/* test.h */

#ifndef wolfSSL_TEST_H
#define wolfSSL_TEST_H

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <ctype.h>
#include <wolfssl/wolfcrypt/types.h>
#include <wolfssl/wolfcrypt/error-crypt.h>
#include <wolfssl/wolfcrypt/random.h>
#include <wolfssl/wolfcrypt/mem_track.h>
#if defined(SHOW_CERTS) && \
    (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
    #include <wolfssl/wolfcrypt/asn.h> /* for domain component NID value */
#endif

#ifdef ATOMIC_USER
    #include <wolfssl/wolfcrypt/aes.h>
    #include <wolfssl/wolfcrypt/arc4.h>
    #include <wolfssl/wolfcrypt/hmac.h>
#endif
#ifdef HAVE_PK_CALLBACKS
    #include <wolfssl/wolfcrypt/asn.h>
    #ifndef NO_RSA
        #include <wolfssl/wolfcrypt/rsa.h>
    #endif
    #ifdef HAVE_ECC
        #include <wolfssl/wolfcrypt/ecc.h>
    #endif /* HAVE_ECC */
    #ifndef NO_DH
        #include <wolfssl/wolfcrypt/dh.h>
    #endif /* !NO_DH */
    #ifdef HAVE_ED25519
        #include <wolfssl/wolfcrypt/ed25519.h>
    #endif /* HAVE_ED25519 */
    #ifdef HAVE_CURVE25519
        #include <wolfssl/wolfcrypt/curve25519.h>
    #endif /* HAVE_ECC */
    #ifdef HAVE_ED448
        #include <wolfssl/wolfcrypt/ed448.h>
    #endif /* HAVE_ED448 */
    #ifdef HAVE_CURVE448
        #include <wolfssl/wolfcrypt/curve448.h>
    #endif /* HAVE_ECC */
#endif /*HAVE_PK_CALLBACKS */

#ifdef USE_WINDOWS_API
    #include <winsock2.h>
    #include <process.h>
    #ifdef TEST_IPV6            /* don't require newer SDK for IPV4 */
        #include <ws2tcpip.h>
        #include <wspiapi.h>
    #endif
    #define SOCKET_T SOCKET
    #define SNPRINTF _snprintf
    #define XSLEEP_MS(t) Sleep(t)
#elif defined(WOLFSSL_MDK_ARM) || defined(WOLFSSL_KEIL_TCP_NET)
    #include <string.h>
    #include "rl_net.h"
    #define SOCKET_T int
    typedef int socklen_t ;
    #define inet_addr wolfSSL_inet_addr
    static unsigned long wolfSSL_inet_addr(const char *cp)
    {
        unsigned int a[4] ; unsigned long ret ;
        sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) ;
        ret = ((a[3]<<24) + (a[2]<<16) + (a[1]<<8) + a[0]) ;
        return(ret) ;
    }
    #if defined(HAVE_KEIL_RTX)
        #define XSLEEP_MS(t)  os_dly_wait(t)
    #elif defined(WOLFSSL_CMSIS_RTOS) || defined(WOLFSSL_CMSIS_RTOSv2)
        #define XSLEEP_MS(t)  osDelay(t)
    #endif
#elif defined(WOLFSSL_TIRTOS)
    #include <string.h>
    #include <netdb.h>
    #include <sys/types.h>
    #include <arpa/inet.h>
    #include <sys/socket.h>
    #include <ti/sysbios/knl/Task.h>
    struct hostent {
        char *h_name; /* official name of host */
        char **h_aliases; /* alias list */
        int h_addrtype; /* host address type */
        int h_length; /* length of address */
        char **h_addr_list; /* list of addresses from name server */
    };
    #define SOCKET_T int
    #define XSLEEP_MS(t) Task_sleep(t/1000)
#elif defined(WOLFSSL_VXWORKS)
    #include <hostLib.h>
    #include <sockLib.h>
    #include <arpa/inet.h>
    #include <string.h>
    #include <selectLib.h>
    #include <sys/types.h>
    #include <netinet/in.h>
    #include <fcntl.h>
    #include <sys/time.h>
    #include <netdb.h>
    #include <pthread.h>
    #define SOCKET_T int
#elif defined(WOLFSSL_ZEPHYR)
    #include <string.h>
    #include <sys/types.h>
    #include <net/socket.h>
    #define SOCKET_T int
    #define SOL_SOCKET 1
    #define SO_REUSEADDR 201
    #define WOLFSSL_USE_GETADDRINFO

    static unsigned long inet_addr(const char *cp)
    {
        unsigned int a[4]; unsigned long ret;
        int i, j;
        for (i=0, j=0; i<4; i++) {
            a[i] = 0;
            while (cp[j] != '.' && cp[j] != '\0') {
                a[i] *= 10;
                a[i] += cp[j] - '0';
                j++;
            }
        }
        ret = ((a[3]<<24) + (a[2]<<16) + (a[1]<<8) + a[0]) ;
        return(ret) ;
    }
#else
    #include <string.h>
    #include <sys/types.h>
#ifndef WOLFSSL_LEANPSK
    #include <unistd.h>
    #include <netdb.h>
    #include <netinet/in.h>
    #include <netinet/tcp.h>
    #include <arpa/inet.h>
    #include <sys/ioctl.h>
    #include <sys/time.h>
    #include <sys/socket.h>
    #include <pthread.h>
    #include <fcntl.h>
    #ifdef TEST_IPV6
        #include <netdb.h>
    #endif
#endif
    #ifdef FREESCALE_MQX
        typedef int socklen_t ;
    #endif
    #define SOCKET_T int
    #ifndef SO_NOSIGPIPE
        #include <signal.h>  /* ignore SIGPIPE */
    #endif
    #define SNPRINTF snprintf

    #define XSELECT_WAIT(x,y) do { \
        struct timeval tv = {(x),(y)}; \
        select(0, NULL, NULL, NULL, &tv); \
    } while (0)
    #define XSLEEP_US(u) XSELECT_WAIT(0,u)
    #define XSLEEP_MS(m) XSELECT_WAIT(0,(m)*1000)
#endif /* USE_WINDOWS_API */

#ifndef XSLEEP_MS
    #define XSLEEP_MS(t) sleep(t/1000)
#endif

#ifdef WOLFSSL_ASYNC_CRYPT
    #include <wolfssl/wolfcrypt/async.h>
#endif
#ifdef HAVE_CAVIUM
    #include <wolfssl/wolfcrypt/port/cavium/cavium_nitrox.h>
#endif
#ifdef _MSC_VER
    /* disable conversion warning */
    /* 4996 warning to use MS extensions e.g., strcpy_s instead of strncpy */
    #pragma warning(disable:4244 4996)
#endif

#ifndef WOLFSSL_CIPHER_LIST_MAX_SIZE
    #define WOLFSSL_CIPHER_LIST_MAX_SIZE 4096
#endif
/* Buffer for benchmark tests */
#ifndef TEST_BUFFER_SIZE
    #define TEST_BUFFER_SIZE 16384
#endif

#ifndef WOLFSSL_HAVE_MIN
    #define WOLFSSL_HAVE_MIN
    static WC_INLINE word32 min(word32 a, word32 b)
    {
        return a > b ? b : a;
    }
#endif /* WOLFSSL_HAVE_MIN */

/* Socket Handling */
#ifndef WOLFSSL_SOCKET_INVALID
#ifdef USE_WINDOWS_API
    #define WOLFSSL_SOCKET_INVALID  ((SOCKET_T)INVALID_SOCKET)
#elif defined(WOLFSSL_TIRTOS)
    #define WOLFSSL_SOCKET_INVALID  ((SOCKET_T)-1)
#else
    #define WOLFSSL_SOCKET_INVALID  (SOCKET_T)(0)
#endif
#endif /* WOLFSSL_SOCKET_INVALID */

#ifndef WOLFSSL_SOCKET_IS_INVALID
#if defined(USE_WINDOWS_API) || defined(WOLFSSL_TIRTOS)
    #define WOLFSSL_SOCKET_IS_INVALID(s)  ((SOCKET_T)(s) == WOLFSSL_SOCKET_INVALID)
#else
    #define WOLFSSL_SOCKET_IS_INVALID(s)  ((SOCKET_T)(s) < WOLFSSL_SOCKET_INVALID)
#endif
#endif /* WOLFSSL_SOCKET_IS_INVALID */

#if defined(__MACH__) || defined(USE_WINDOWS_API)
    #ifndef _SOCKLEN_T
        typedef int socklen_t;
    #endif
#endif


/* HPUX doesn't use socklent_t for third parameter to accept, unless
   _XOPEN_SOURCE_EXTENDED is defined */
#if !defined(__hpux__) && !defined(WOLFSSL_MDK_ARM) && !defined(WOLFSSL_IAR_ARM)\
 && !defined(WOLFSSL_ROWLEY_ARM)  && !defined(WOLFSSL_KEIL_TCP_NET)
    typedef socklen_t* ACCEPT_THIRD_T;
#else
    #if defined _XOPEN_SOURCE_EXTENDED
        typedef socklen_t* ACCEPT_THIRD_T;
    #else
        typedef int*       ACCEPT_THIRD_T;
    #endif
#endif



#ifdef SINGLE_THREADED
    typedef unsigned int  THREAD_RETURN;
    typedef void*         THREAD_TYPE;
    #define WOLFSSL_THREAD
#else
    #if defined(_POSIX_THREADS) && !defined(__MINGW32__)
        typedef void*         THREAD_RETURN;
        typedef pthread_t     THREAD_TYPE;
        #define WOLFSSL_THREAD
        #define INFINITE -1
        #define WAIT_OBJECT_0 0L
    #elif defined(WOLFSSL_MDK_ARM)|| defined(WOLFSSL_KEIL_TCP_NET) || defined(FREESCALE_MQX)
        typedef unsigned int  THREAD_RETURN;
        typedef int           THREAD_TYPE;
        #define WOLFSSL_THREAD
    #elif defined(WOLFSSL_TIRTOS)
        typedef void          THREAD_RETURN;
        typedef Task_Handle   THREAD_TYPE;
        #define WOLFSSL_THREAD
    #elif defined(WOLFSSL_ZEPHYR)
        typedef void            THREAD_RETURN;
        typedef struct k_thread THREAD_TYPE;
        #define WOLFSSL_THREAD
    #else
        typedef unsigned int  THREAD_RETURN;
        typedef intptr_t      THREAD_TYPE;
        #define WOLFSSL_THREAD __stdcall
    #endif
#endif


#ifdef TEST_IPV6
    typedef struct sockaddr_in6 SOCKADDR_IN_T;
    #define AF_INET_V    AF_INET6
#else
    typedef struct sockaddr_in  SOCKADDR_IN_T;
    #define AF_INET_V    AF_INET
#endif


#ifndef WOLFSSL_NO_TLS12
#define SERVER_DEFAULT_VERSION 3
#else
#define SERVER_DEFAULT_VERSION 4
#endif
#define SERVER_DTLS_DEFAULT_VERSION (-2)
#define SERVER_INVALID_VERSION (-99)
#define SERVER_DOWNGRADE_VERSION (-98)
#ifndef WOLFSSL_NO_TLS12
#define CLIENT_DEFAULT_VERSION 3
#else
#define CLIENT_DEFAULT_VERSION 4
#endif
#define CLIENT_DTLS_DEFAULT_VERSION (-2)
#define CLIENT_INVALID_VERSION (-99)
#define CLIENT_DOWNGRADE_VERSION (-98)
#define EITHER_DOWNGRADE_VERSION (-97)
#if !defined(NO_FILESYSTEM) && defined(WOLFSSL_MAX_STRENGTH)
    #define DEFAULT_MIN_DHKEY_BITS 2048
    #define DEFAULT_MAX_DHKEY_BITS 3072
#else
    #define DEFAULT_MIN_DHKEY_BITS 1024
    #define DEFAULT_MAX_DHKEY_BITS 2048
#endif
#if !defined(NO_FILESYSTEM) && defined(WOLFSSL_MAX_STRENGTH)
    #define DEFAULT_MIN_RSAKEY_BITS 2048
#else
    #ifndef DEFAULT_MIN_RSAKEY_BITS
    #define DEFAULT_MIN_RSAKEY_BITS 1024
    #endif
#endif
#if !defined(NO_FILESYSTEM) && defined(WOLFSSL_MAX_STRENGTH)
    #define DEFAULT_MIN_ECCKEY_BITS 256
#else
    #ifndef DEFAULT_MIN_ECCKEY_BITS
    #define DEFAULT_MIN_ECCKEY_BITS 224
    #endif
#endif

/* all certs relative to wolfSSL home directory now */
#if defined(WOLFSSL_NO_CURRDIR) || defined(WOLFSSL_MDK_SHELL)
#define caCertFile        "certs/ca-cert.pem"
#define eccCertFile       "certs/server-ecc.pem"
#define eccKeyFile        "certs/ecc-key.pem"
#define eccRsaCertFile    "certs/server-ecc-rsa.pem"
#define svrCertFile       "certs/server-cert.pem"
#define svrKeyFile        "certs/server-key.pem"
#define cliCertFile       "certs/client-cert.pem"
#define cliCertDerFile    "certs/client-cert.der"
#define cliCertFileExt    "certs/client-cert-ext.pem"
#define cliCertDerFileExt "certs/client-cert-ext.der"
#define cliKeyFile        "certs/client-key.pem"
#define ntruCertFile      "certs/ntru-cert.pem"
#define ntruKeyFile       "certs/ntru-key.raw"
#define dhParamFile       "certs/dh2048.pem"
#define cliEccKeyFile     "certs/ecc-client-key.pem"
#define cliEccCertFile    "certs/client-ecc-cert.pem"
#define caEccCertFile     "certs/ca-ecc-cert.pem"
#define crlPemDir         "certs/crl"
#define edCertFile        "certs/ed25519/server-ed25519-cert.pem"
#define edKeyFile         "certs/ed25519/server-ed25519-priv.pem"
#define cliEdCertFile     "certs/ed25519/client-ed25519.pem"
#define cliEdKeyFile      "certs/ed25519/client-ed25519-priv.pem"
#define caEdCertFile      "certs/ed25519/ca-ed25519.pem"
#define ed448CertFile     "certs/ed448/server-ed448-cert.pem"
#define ed448KeyFile      "certs/ed448/server-ed448-priv.pem"
#define cliEd448CertFile  "certs/ed448/client-ed448.pem"
#define cliEd448KeyFile   "certs/ed448/client-ed448-priv.pem"
#define caEd448CertFile   "certs/ed448/ca-ed448.pem"
#ifdef HAVE_WNR
    /* Whitewood netRandom default config file */
    #define wnrConfig     "wnr-example.conf"
#endif
#else
#define caCertFile        "./certs/ca-cert.pem"
#define eccCertFile       "./certs/server-ecc.pem"
#define eccKeyFile        "./certs/ecc-key.pem"
#define eccRsaCertFile    "./certs/server-ecc-rsa.pem"
#define svrCertFile       "./certs/server-cert.pem"
#define svrKeyFile        "./certs/server-key.pem"
#define cliCertFile       "./certs/client-cert.pem"
#define cliCertDerFile    "./certs/client-cert.der"
#define cliCertFileExt    "./certs/client-cert-ext.pem"
#define cliCertDerFileExt "./certs/client-cert-ext.der"
#define cliKeyFile        "./certs/client-key.pem"
#define ntruCertFile      "./certs/ntru-cert.pem"
#define ntruKeyFile       "./certs/ntru-key.raw"
#define dhParamFile       "./certs/dh2048.pem"
#define cliEccKeyFile     "./certs/ecc-client-key.pem"
#define cliEccCertFile    "./certs/client-ecc-cert.pem"
#define caEccCertFile     "./certs/ca-ecc-cert.pem"
#define crlPemDir         "./certs/crl"
#define edCertFile        "./certs/ed25519/server-ed25519-cert.pem"
#define edKeyFile         "./certs/ed25519/server-ed25519-priv.pem"
#define cliEdCertFile     "./certs/ed25519/client-ed25519.pem"
#define cliEdKeyFile      "./certs/ed25519/client-ed25519-priv.pem"
#define caEdCertFile      "./certs/ed25519/ca-ed25519.pem"
#define ed448CertFile     "./certs/ed448/server-ed448-cert.pem"
#define ed448KeyFile      "./certs/ed448/server-ed448-priv.pem"
#define cliEd448CertFile  "./certs/ed448/client-ed448.pem"
#define cliEd448KeyFile   "./certs/ed448/client-ed448-priv.pem"
#define caEd448CertFile   "./certs/ed448/ca-ed448.pem"
#ifdef HAVE_WNR
    /* Whitewood netRandom default config file */
    #define wnrConfig     "./wnr-example.conf"
#endif
#endif

typedef struct tcp_ready {
    word16 ready;              /* predicate */
    word16 port;
    char*  srfName;     /* server ready file name */
#if defined(_POSIX_THREADS) && !defined(__MINGW32__)
    pthread_mutex_t mutex;
    pthread_cond_t  cond;
#endif
} tcp_ready;


static WC_INLINE void InitTcpReady(tcp_ready* ready)
{
    ready->ready = 0;
    ready->port = 0;
    ready->srfName = NULL;
#ifdef SINGLE_THREADED
#elif defined(_POSIX_THREADS) && !defined(__MINGW32__)
    pthread_mutex_init(&ready->mutex, 0);
    pthread_cond_init(&ready->cond, 0);
#endif
}


static WC_INLINE void FreeTcpReady(tcp_ready* ready)
{
#ifdef SINGLE_THREADED
    (void)ready;
#elif defined(_POSIX_THREADS) && !defined(__MINGW32__)
    pthread_mutex_destroy(&ready->mutex);
    pthread_cond_destroy(&ready->cond);
#else
    (void)ready;
#endif
}

typedef WOLFSSL_METHOD* (*method_provider)(void);
typedef void (*ctx_callback)(WOLFSSL_CTX* ctx);
typedef void (*ssl_callback)(WOLFSSL* ssl);

typedef struct callback_functions {
    method_provider method;
    ctx_callback ctx_ready;
    ssl_callback ssl_ready;
    ssl_callback on_result;
    WOLFSSL_CTX* ctx;
    unsigned char isSharedCtx:1;
} callback_functions;

typedef struct func_args {
    int    argc;
    char** argv;
    int    return_code;
    tcp_ready* signal;
    callback_functions *callbacks;
} func_args;




void wait_tcp_ready(func_args*);

#ifdef WOLFSSL_ZEPHYR
typedef void THREAD_FUNC(void*, void*, void*);
#else
typedef THREAD_RETURN WOLFSSL_THREAD THREAD_FUNC(void*);
#endif

void start_thread(THREAD_FUNC, func_args*, THREAD_TYPE*);
void join_thread(THREAD_TYPE);

/* wolfSSL */
#ifndef TEST_IPV6
    static const char* const wolfSSLIP   = "127.0.0.1";
#else
    static const char* const wolfSSLIP   = "::1";
#endif
static const word16      wolfSSLPort = 11111;



#ifndef MY_EX_USAGE
#define MY_EX_USAGE 2
#endif

#ifndef EXIT_FAILURE
#define EXIT_FAILURE 1
#endif

#if defined(WOLFSSL_FORCE_MALLOC_FAIL_TEST) || defined(WOLFSSL_ZEPHYR)
    #ifndef EXIT_SUCCESS
        #define EXIT_SUCCESS   0
    #endif
    #define XEXIT(rc)   return rc
    #define XEXIT_T(rc) return (THREAD_RETURN)rc
#else
    #define XEXIT(rc)   exit((int)(rc))
    #define XEXIT_T(rc) exit((int)(rc))
#endif


static WC_INLINE
#if defined(WOLFSSL_FORCE_MALLOC_FAIL_TEST) || defined(WOLFSSL_ZEPHYR)
THREAD_RETURN
#else
WC_NORETURN void
#endif
err_sys(const char* msg)
{
#if !defined(__GNUC__)
    /* scan-build (which pretends to be gnuc) can get confused and think the
     * msg pointer can be null even when hardcoded and then it won't exit,
     * making null pointer checks above the err_sys() call useless.
     * We could just always exit() but some compilers will complain about no
     * possible return, with gcc we know the attribute to handle that with
     * WC_NORETURN. */
    if (msg)
#endif
    {
        printf("wolfSSL error: %s\n", msg);

        XEXIT_T(EXIT_FAILURE);
    }
}

static WC_INLINE
#if defined(WOLFSSL_FORCE_MALLOC_FAIL_TEST) || defined(WOLFSSL_ZEPHYR)
THREAD_RETURN
#else
WC_NORETURN void
#endif
err_sys_with_errno(const char* msg)
{
#if !defined(__GNUC__)
    /* scan-build (which pretends to be gnuc) can get confused and think the
     * msg pointer can be null even when hardcoded and then it won't exit,
     * making null pointer checks above the err_sys() call useless.
     * We could just always exit() but some compilers will complain about no
     * possible return, with gcc we know the attribute to handle that with
     * WC_NORETURN. */
    if (msg)
#endif
    {
#if defined(HAVE_STRING_H) && defined(HAVE_ERRNO_H)
        printf("wolfSSL error: %s: %s\n", msg, strerror(errno));
#else
        printf("wolfSSL error: %s\n", msg);
#endif

        XEXIT_T(EXIT_FAILURE);
    }
}


extern int   myoptind;
extern char* myoptarg;

/**
 *
 * @param argc Number of argv strings
 * @param argv Array of string arguments
 * @param optstring String containing the supported alphanumeric arguments.
 *                  A ':' following a character means that it requires a
 *                  value in myoptarg to be set. A ';' means that the
 *                  myoptarg is optional. myoptarg is set to "" if not
 *                  present.
 * @return Option letter in argument
 */
static WC_INLINE int mygetopt(int argc, char** argv, const char* optstring)
{
    static char* next = NULL;

    char  c;
    char* cp;

    /* Added sanity check becuase scan-build complains argv[myoptind] access 
     * results in a null pointer dereference. */
    if (argv == NULL)  {
        myoptarg = NULL;
        return -1;
    }

    if (myoptind == 0)
        next = NULL;   /* we're starting new/over */

    if (next == NULL || *next == '\0') {
        if (myoptind == 0)
            myoptind++;

        if (myoptind >= argc || argv[myoptind] == NULL ||
                argv[myoptind][0] != '-' || argv[myoptind][1] == '\0') {
            myoptarg = NULL;
            if (myoptind < argc)
                myoptarg = argv[myoptind];

            return -1;
        }

        if (strcmp(argv[myoptind], "--") == 0) {
            myoptind++;
            myoptarg = NULL;

            if (myoptind < argc)
                myoptarg = argv[myoptind];

            return -1;
        }

        next = argv[myoptind];
        next++;                  /* skip - */
        myoptind++;
    }

    c  = *next++;
    /* The C++ strchr can return a different value */
    cp = (char*)strchr(optstring, c);

    if (cp == NULL || c == ':' || c == ';')
        return '?';

    cp++;

    if (*cp == ':') {
        if (*next != '\0') {
            myoptarg = next;
            next     = NULL;
        }
        else if (myoptind < argc) {
            myoptarg = argv[myoptind];
            myoptind++;
        }
        else
            return '?';
    }
    else if (*cp == ';') {
        myoptarg = (char*)"";
        if (*next != '\0') {
            myoptarg = next;
            next     = NULL;
        }
        else if (myoptind < argc) {
            /* Check if next argument is not a parameter argument */
            if (argv[myoptind] && argv[myoptind][0] != '-') {
                myoptarg = argv[myoptind];
                myoptind++;
            }
        }
    }

    return c;
}


#ifdef WOLFSSL_ENCRYPTED_KEYS

static WC_INLINE int PasswordCallBack(char* passwd, int sz, int rw, void* userdata)
{
    (void)rw;
    (void)userdata;
    if (userdata != NULL) {
        strncpy(passwd, (char*)userdata, sz);
        return (int)XSTRLEN((char*)userdata);
    }
    else {
        strncpy(passwd, "yassl123", sz);
        return 8;
    }
}

#endif

static const char* client_showpeer_msg[][8] = {
    /* English */
    {
        "SSL version is",
        "SSL cipher suite is",
        "SSL curve name is",
        "SSL DH size is",
        "SSL reused session",
        "Alternate cert chain used",
        "peer's cert info:",
        NULL
    },
#ifndef NO_MULTIBYTE_PRINT
    /* Japanese */
    {
        "SSL バージョンは",
        "SSL 暗号スイートは",
        "SSL 曲線名は",
        "SSL DH サイズは",
        "SSL 再利用セッション",
        "代替証明チェーンを使用",
        "相手方証明書情報",
        NULL
    },
#endif
};

#if defined(KEEP_PEER_CERT) || defined(KEEP_OUR_CERT) || defined(SESSION_CERTS)
static const char* client_showx509_msg[][5] = {
    /* English */
    {
        "issuer",
        "subject",
        "altname",
        "serial number",
        NULL
    },
#ifndef NO_MULTIBYTE_PRINT
    /* Japanese */
    {
        "発行者",
        "サブジェクト",
        "代替名",
        "シリアル番号",
        NULL
    },
#endif
};

/* lng_index is to specify the language for displaying message.              */
/* 0:English, 1:Japanese                                                     */
static WC_INLINE void ShowX509Ex(WOLFSSL_X509* x509, const char* hdr,
                                                                 int lng_index)
{
    char* altName;
    char* issuer;
    char* subject;
    byte  serial[32];
    int   ret;
    int   sz = sizeof(serial);
    const char** words = client_showx509_msg[lng_index];

    if (x509 == NULL) {
        printf("%s No Cert\n", hdr);
        return;
    }

    issuer  = wolfSSL_X509_NAME_oneline(
                                      wolfSSL_X509_get_issuer_name(x509), 0, 0);
    subject = wolfSSL_X509_NAME_oneline(
                                     wolfSSL_X509_get_subject_name(x509), 0, 0);

    printf("%s\n %s : %s\n %s: %s\n", hdr, words[0], issuer, words[1], subject);

    while ( (altName = wolfSSL_X509_get_next_altname(x509)) != NULL)
        printf(" %s = %s\n", words[2], altName);

    ret = wolfSSL_X509_get_serial_number(x509, serial, &sz);
    if (ret == WOLFSSL_SUCCESS) {
        int  i;
        int  strLen;
        char serialMsg[80];

        /* testsuite has multiple threads writing to stdout, get output
           message ready to write once */
        strLen = sprintf(serialMsg, " %s", words[3]);
        for (i = 0; i < sz; i++)
            sprintf(serialMsg + strLen + (i*3), ":%02x ", serial[i]);
        printf("%s\n", serialMsg);
    }

    XFREE(subject, 0, DYNAMIC_TYPE_OPENSSL);
    XFREE(issuer,  0, DYNAMIC_TYPE_OPENSSL);

#if defined(SHOW_CERTS) && defined(OPENSSL_EXTRA)
    {
        WOLFSSL_BIO* bio;
        char buf[256]; /* should be size of ASN_NAME_MAX */
        int  textSz;

        /* print out domain component if certificate has it */
        textSz = wolfSSL_X509_NAME_get_text_by_NID(
                wolfSSL_X509_get_subject_name(x509), NID_domainComponent,
                buf, sizeof(buf));
        if (textSz > 0) {
            printf("Domain Component = %s\n", buf);
        }

        bio = wolfSSL_BIO_new(wolfSSL_BIO_s_file());
        if (bio != NULL) {
            wolfSSL_BIO_set_fp(bio, stdout, BIO_NOCLOSE);
            wolfSSL_X509_print(bio, x509);
            wolfSSL_BIO_free(bio);
        }
    }
#endif /* SHOW_CERTS && OPENSSL_EXTRA */
}
/* original ShowX509 to maintain compatibility */
static WC_INLINE void ShowX509(WOLFSSL_X509* x509, const char* hdr)
{
    ShowX509Ex(x509, hdr, 0);
}

#endif /* KEEP_PEER_CERT || KEEP_OUR_CERT || SESSION_CERTS */

#if defined(SHOW_CERTS) && defined(SESSION_CERTS) && \
    (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
static WC_INLINE void ShowX509Chain(WOLFSSL_X509_CHAIN* chain, int count,
    const char* hdr)
{
    int i;
    int length;
    unsigned char buffer[3072];
    WOLFSSL_X509* chainX509;

    for (i = 0; i < count; i++) {
        wolfSSL_get_chain_cert_pem(chain, i, buffer, sizeof(buffer), &length);
        buffer[length] = 0;
        printf("\n%s: %d has length %d data = \n%s\n", hdr, i, length, buffer);

        chainX509 = wolfSSL_get_chain_X509(chain, i);
        if (chainX509)
            ShowX509(chainX509, hdr);
        else
            printf("get_chain_X509 failed\n");
        wolfSSL_FreeX509(chainX509);
    }
}
#endif /* SHOW_CERTS && SESSION_CERTS */

/* lng_index is to specify the language for displaying message.              */
/* 0:English, 1:Japanese                                                     */
static WC_INLINE void showPeerEx(WOLFSSL* ssl, int lng_index)
{
    WOLFSSL_CIPHER* cipher;
    const char** words = client_showpeer_msg[lng_index];

#if defined(HAVE_ECC) || defined(HAVE_CURVE25519) || defined(HAVE_CURVE448) || \
                                                                 !defined(NO_DH)
    const char *name;
#endif
#ifndef NO_DH
    int bits;
#endif
#ifdef KEEP_PEER_CERT
    WOLFSSL_X509* peer = wolfSSL_get_peer_certificate(ssl);
    if (peer)
        ShowX509Ex(peer, words[6], lng_index);
    else
        printf("peer has no cert!\n");
    wolfSSL_FreeX509(peer);
#endif
#if defined(SHOW_CERTS) && defined(KEEP_OUR_CERT) && \
    (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
    ShowX509(wolfSSL_get_certificate(ssl), "our cert info:");
    printf("Peer verify result = %lu\n", wolfSSL_get_verify_result(ssl));
#endif /* SHOW_CERTS && KEEP_OUR_CERT */
    printf("%s %s\n", words[0], wolfSSL_get_version(ssl));

    cipher = wolfSSL_get_current_cipher(ssl);
#ifdef HAVE_QSH
    printf("%s %s%s\n", words[1], (wolfSSL_isQSH(ssl))? "QSH:": "",
            wolfSSL_CIPHER_get_name(cipher));
#else
    printf("%s %s\n", words[1], wolfSSL_CIPHER_get_name(cipher));
#endif
#if defined(HAVE_ECC) || defined(HAVE_CURVE25519) || defined(HAVE_CURVE448) || \
                                                                 !defined(NO_DH)
    if ((name = wolfSSL_get_curve_name(ssl)) != NULL)
        printf("%s %s\n", words[2], name);
#endif
#ifndef NO_DH
    else if ((bits = wolfSSL_GetDhKey_Sz(ssl)) > 0)
        printf("%s %d bits\n", words[3], bits);
#endif
    if (wolfSSL_session_reused(ssl))
        printf("%s\n", words[4]);
#ifdef WOLFSSL_ALT_CERT_CHAINS
    if (wolfSSL_is_peer_alt_cert_chain(ssl))
        printf("%s\n", words[5]);
#endif

#if defined(SHOW_CERTS) && defined(SESSION_CERTS) && \
    (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
    {
        WOLFSSL_X509_CHAIN* chain;

        chain = wolfSSL_get_peer_chain(ssl);
        ShowX509Chain(chain, wolfSSL_get_chain_count(chain), "session cert");

    #ifdef WOLFSSL_ALT_CERT_CHAINS
        if (wolfSSL_is_peer_alt_cert_chain(ssl)) {
            chain = wolfSSL_get_peer_alt_chain(ssl);
            ShowX509Chain(chain, wolfSSL_get_chain_count(chain), "alt cert");
        }
    #endif
    }
#endif /* SHOW_CERTS && SESSION_CERTS */
  (void)ssl;
}
/* original showPeer to maintain compatibility */
static WC_INLINE void showPeer(WOLFSSL* ssl)
{
    showPeerEx(ssl, 0);
}

static WC_INLINE void build_addr(SOCKADDR_IN_T* addr, const char* peer,
                              word16 port, int udp, int sctp)
{
    int useLookup = 0;
    (void)useLookup;
    (void)udp;
    (void)sctp;

    if (addr == NULL)
        err_sys("invalid argument to build_addr, addr is NULL");

    XMEMSET(addr, 0, sizeof(SOCKADDR_IN_T));

#ifndef TEST_IPV6
    /* peer could be in human readable form */
    if ( ((size_t)peer != INADDR_ANY) && isalpha((int)peer[0])) {
    #ifndef WOLFSSL_USE_GETADDRINFO
        #if defined(WOLFSSL_MDK_ARM) || defined(WOLFSSL_KEIL_TCP_NET)
            int err;
            struct hostent* entry = gethostbyname(peer, &err);
        #elif defined(WOLFSSL_TIRTOS)
            struct hostent* entry = DNSGetHostByName(peer);
        #elif defined(WOLFSSL_VXWORKS)
            struct hostent* entry = (struct hostent*)hostGetByName((char*)peer);
        #else
            struct hostent* entry = gethostbyname(peer);
        #endif

        if (entry) {
            XMEMCPY(&addr->sin_addr.s_addr, entry->h_addr_list[0],
                   entry->h_length);
            useLookup = 1;
        }
    #else
        struct zsock_addrinfo hints, *addrInfo;
        char portStr[6];
        XSNPRINTF(portStr, sizeof(portStr), "%d", port);
        memset(&hints, 0, sizeof(hints));
        hints.ai_family = AF_UNSPEC;
        hints.ai_socktype = udp ? SOCK_DGRAM : SOCK_STREAM;
        hints.ai_protocol = udp ? IPPROTO_UDP : IPPROTO_TCP;
        if (getaddrinfo((char*)peer, portStr, &hints, &addrInfo) == 0) {
            XMEMCPY(addr, addrInfo->ai_addr, sizeof(*addr));
            useLookup = 1;
        }
    #endif
        else
            err_sys("no entry for host");
    }
#endif


#ifndef TEST_IPV6
    #if defined(WOLFSSL_MDK_ARM) || defined(WOLFSSL_KEIL_TCP_NET)
        addr->sin_family = PF_INET;
    #else
        addr->sin_family = AF_INET_V;
    #endif
    addr->sin_port = XHTONS(port);
    if ((size_t)peer == INADDR_ANY)
        addr->sin_addr.s_addr = INADDR_ANY;
    else {
        if (!useLookup)
            addr->sin_addr.s_addr = inet_addr(peer);
    }
#else
    addr->sin6_family = AF_INET_V;
    addr->sin6_port = XHTONS(port);
    if ((size_t)peer == INADDR_ANY) {
        addr->sin6_addr = in6addr_any;
    }
    else {
        #if defined(HAVE_GETADDRINFO) || defined(WOLF_C99)
            struct addrinfo  hints;
            struct addrinfo* answer = NULL;
            int    ret;
            char   strPort[80];

            XMEMSET(&hints, 0, sizeof(hints));

            hints.ai_family   = AF_INET_V;
            if (udp) {
                hints.ai_socktype = SOCK_DGRAM;
                hints.ai_protocol = IPPROTO_UDP;
            }
        #ifdef WOLFSSL_SCTP
            else if (sctp) {
                hints.ai_socktype = SOCK_STREAM;
                hints.ai_protocol = IPPROTO_SCTP;
            }
        #endif
            else {
                hints.ai_socktype = SOCK_STREAM;
                hints.ai_protocol = IPPROTO_TCP;
            }

            SNPRINTF(strPort, sizeof(strPort), "%d", port);
            strPort[79] = '\0';

            ret = getaddrinfo(peer, strPort, &hints, &answer);
            if (ret < 0 || answer == NULL)
                err_sys("getaddrinfo failed");

            XMEMCPY(addr, answer->ai_addr, answer->ai_addrlen);
            freeaddrinfo(answer);
        #else
            printf("no ipv6 getaddrinfo, loopback only tests/examples\n");
            addr->sin6_addr = in6addr_loopback;
        #endif
    }
#endif
}


static WC_INLINE void tcp_socket(SOCKET_T* sockfd, int udp, int sctp)
{
    (void)sctp;

    if (udp)
        *sockfd = socket(AF_INET_V, SOCK_DGRAM, IPPROTO_UDP);
#ifdef WOLFSSL_SCTP
    else if (sctp)
        *sockfd = socket(AF_INET_V, SOCK_STREAM, IPPROTO_SCTP);
#endif
    else
        *sockfd = socket(AF_INET_V, SOCK_STREAM, IPPROTO_TCP);

    if(WOLFSSL_SOCKET_IS_INVALID(*sockfd)) {
        err_sys_with_errno("socket failed\n");
    }

#ifndef USE_WINDOWS_API
#ifdef SO_NOSIGPIPE
    {
        int       on = 1;
        socklen_t len = sizeof(on);
        int       res = setsockopt(*sockfd, SOL_SOCKET, SO_NOSIGPIPE, &on, len);
        if (res < 0)
            err_sys_with_errno("setsockopt SO_NOSIGPIPE failed\n");
    }
#elif defined(WOLFSSL_MDK_ARM) || defined (WOLFSSL_TIRTOS) ||\
                        defined(WOLFSSL_KEIL_TCP_NET) || defined(WOLFSSL_ZEPHYR)
    /* nothing to define */
#else  /* no S_NOSIGPIPE */
    signal(SIGPIPE, SIG_IGN);
#endif /* S_NOSIGPIPE */

#if defined(TCP_NODELAY)
    if (!udp && !sctp)
    {
        int       on = 1;
        socklen_t len = sizeof(on);
        int       res = setsockopt(*sockfd, IPPROTO_TCP, TCP_NODELAY, &on, len);
        if (res < 0)
            err_sys_with_errno("setsockopt TCP_NODELAY failed\n");
    }
#endif
#endif  /* USE_WINDOWS_API */
}

static WC_INLINE void tcp_connect(SOCKET_T* sockfd, const char* ip, word16 port,
                               int udp, int sctp, WOLFSSL* ssl)
{
    SOCKADDR_IN_T addr;
    build_addr(&addr, ip, port, udp, sctp);
    if (udp) {
        wolfSSL_dtls_set_peer(ssl, &addr, sizeof(addr));
    }
    tcp_socket(sockfd, udp, sctp);

    if (!udp) {
        if (connect(*sockfd, (const struct sockaddr*)&addr, sizeof(addr)) != 0)
            err_sys_with_errno("tcp connect failed");
    }
}


static WC_INLINE void udp_connect(SOCKET_T* sockfd, void* addr, int addrSz)
{
    if (connect(*sockfd, (const struct sockaddr*)addr, addrSz) != 0)
        err_sys_with_errno("tcp connect failed");
}


enum {
    TEST_SELECT_FAIL,
    TEST_TIMEOUT,
    TEST_RECV_READY,
    TEST_SEND_READY,
    TEST_ERROR_READY
};


#if !defined(WOLFSSL_MDK_ARM) && !defined(WOLFSSL_KEIL_TCP_NET) && \
                                 !defined(WOLFSSL_TIRTOS)
static WC_INLINE int tcp_select_ex(SOCKET_T socketfd, int to_sec, int rx)
{
    fd_set fds, errfds;
    fd_set* recvfds = NULL;
    fd_set* sendfds = NULL;
    SOCKET_T nfds = socketfd + 1;
#if !defined(__INTEGRITY)
    struct timeval timeout = {(to_sec > 0) ? to_sec : 0, 0};
#else
    struct timeval timeout;
#endif
    int result;

    FD_ZERO(&fds);
    FD_SET(socketfd, &fds);
    FD_ZERO(&errfds);
    FD_SET(socketfd, &errfds);

    if (rx)
        recvfds = &fds;
    else
        sendfds = &fds;

#if defined(__INTEGRITY)
    timeout.tv_sec = (long long)(to_sec > 0) ? to_sec : 0, 0;
#endif
    result = select(nfds, recvfds, sendfds, &errfds, &timeout);

    if (result == 0)
        return TEST_TIMEOUT;
    else if (result > 0) {
        if (FD_ISSET(socketfd, &fds)) {
            if (rx)
                return TEST_RECV_READY;
            else
                return TEST_SEND_READY;
        }
        else if(FD_ISSET(socketfd, &errfds))
            return TEST_ERROR_READY;
    }

    return TEST_SELECT_FAIL;
}

static WC_INLINE int tcp_select(SOCKET_T socketfd, int to_sec)
{
    return tcp_select_ex(socketfd, to_sec, 1);
}

static WC_INLINE int tcp_select_tx(SOCKET_T socketfd, int to_sec)
{
    return tcp_select_ex(socketfd, to_sec, 0);
}

#elif defined(WOLFSSL_TIRTOS) || defined(WOLFSSL_KEIL_TCP_NET)
static WC_INLINE int tcp_select(SOCKET_T socketfd, int to_sec)
{
    return TEST_RECV_READY;
}
static WC_INLINE int tcp_select_tx(SOCKET_T socketfd, int to_sec)
{
    return TEST_SEND_READY;
}
#endif /* !WOLFSSL_MDK_ARM */


static WC_INLINE void tcp_listen(SOCKET_T* sockfd, word16* port, int useAnyAddr,
                              int udp, int sctp)
{
    SOCKADDR_IN_T addr;

    /* don't use INADDR_ANY by default, firewall may block, make user switch
       on */
    build_addr(&addr, (useAnyAddr ? INADDR_ANY : wolfSSLIP), *port, udp, sctp);
    tcp_socket(sockfd, udp, sctp);

#if !defined(USE_WINDOWS_API) && !defined(WOLFSSL_MDK_ARM)\
                   && !defined(WOLFSSL_KEIL_TCP_NET) && !defined(WOLFSSL_ZEPHYR)
    {
        int       res, on  = 1;
        socklen_t len = sizeof(on);
        res = setsockopt(*sockfd, SOL_SOCKET, SO_REUSEADDR, &on, len);
        if (res < 0)
            err_sys_with_errno("setsockopt SO_REUSEADDR failed\n");
    }
#ifdef SO_REUSEPORT
    {
        int       res, on  = 1;
        socklen_t len = sizeof(on);
        res = setsockopt(*sockfd, SOL_SOCKET, SO_REUSEPORT, &on, len);
        if (res < 0)
            err_sys_with_errno("setsockopt SO_REUSEPORT failed\n");
    }
#endif
#endif

    if (bind(*sockfd, (const struct sockaddr*)&addr, sizeof(addr)) != 0)
        err_sys_with_errno("tcp bind failed");
    if (!udp) {
        #ifdef WOLFSSL_KEIL_TCP_NET
            #define SOCK_LISTEN_MAX_QUEUE 1
        #else
            #define SOCK_LISTEN_MAX_QUEUE 5
        #endif
        if (listen(*sockfd, SOCK_LISTEN_MAX_QUEUE) != 0)
                err_sys_with_errno("tcp listen failed");
    }
    #if !defined(USE_WINDOWS_API) && !defined(WOLFSSL_TIRTOS) \
                                                     && !defined(WOLFSSL_ZEPHYR)
        if (*port == 0) {
            socklen_t len = sizeof(addr);
            if (getsockname(*sockfd, (struct sockaddr*)&addr, &len) == 0) {
                #ifndef TEST_IPV6
                    *port = XNTOHS(addr.sin_port);
                #else
                    *port = XNTOHS(addr.sin6_port);
                #endif
            }
        }
    #endif
}


#if 0
static WC_INLINE int udp_read_connect(SOCKET_T sockfd)
{
    SOCKADDR_IN_T cliaddr;
    byte          b[1500];
    int           n;
    socklen_t     len = sizeof(cliaddr);

    n = (int)recvfrom(sockfd, (char*)b, sizeof(b), MSG_PEEK,
                      (struct sockaddr*)&cliaddr, &len);
    if (n > 0) {
        if (connect(sockfd, (const struct sockaddr*)&cliaddr,
                    sizeof(cliaddr)) != 0)
            err_sys("udp connect failed");
    }
    else
        err_sys("recvfrom failed");

    return sockfd;
}
#endif

static WC_INLINE void udp_accept(SOCKET_T* sockfd, SOCKET_T* clientfd,
                              int useAnyAddr, word16 port, func_args* args)
{
    SOCKADDR_IN_T addr;

    (void)args;
    build_addr(&addr, (useAnyAddr ? INADDR_ANY : wolfSSLIP), port, 1, 0);
    tcp_socket(sockfd, 1, 0);


#if !defined(USE_WINDOWS_API) && !defined(WOLFSSL_MDK_ARM) \
                   && !defined(WOLFSSL_KEIL_TCP_NET) && !defined(WOLFSSL_ZEPHYR)
    {
        int       res, on  = 1;
        socklen_t len = sizeof(on);
        res = setsockopt(*sockfd, SOL_SOCKET, SO_REUSEADDR, &on, len);
        if (res < 0)
            err_sys_with_errno("setsockopt SO_REUSEADDR failed\n");
    }
#ifdef SO_REUSEPORT
    {
        int       res, on  = 1;
        socklen_t len = sizeof(on);
        res = setsockopt(*sockfd, SOL_SOCKET, SO_REUSEPORT, &on, len);
        if (res < 0)
            err_sys_with_errno("setsockopt SO_REUSEPORT failed\n");
    }
#endif
#endif

    if (bind(*sockfd, (const struct sockaddr*)&addr, sizeof(addr)) != 0)
        err_sys_with_errno("tcp bind failed");

    #if (defined(NO_MAIN_DRIVER) && !defined(USE_WINDOWS_API)) && !defined(WOLFSSL_TIRTOS)
        if (port == 0) {
            socklen_t len = sizeof(addr);
            if (getsockname(*sockfd, (struct sockaddr*)&addr, &len) == 0) {
                #ifndef TEST_IPV6
                    port = XNTOHS(addr.sin_port);
                #else
                    port = XNTOHS(addr.sin6_port);
                #endif
            }
        }
    #endif

#if defined(_POSIX_THREADS) && defined(NO_MAIN_DRIVER) && !defined(__MINGW32__)
    /* signal ready to accept data */
    {
    tcp_ready* ready = args->signal;
    pthread_mutex_lock(&ready->mutex);
    ready->ready = 1;
    ready->port = port;
    pthread_cond_signal(&ready->cond);
    pthread_mutex_unlock(&ready->mutex);
    }
#elif defined (WOLFSSL_TIRTOS)
    /* Need mutex? */
    tcp_ready* ready = args->signal;
    ready->ready = 1;
    ready->port = port;
#else
    (void)port;
#endif

    *clientfd = *sockfd;
}

static WC_INLINE void tcp_accept(SOCKET_T* sockfd, SOCKET_T* clientfd,
                              func_args* args, word16 port, int useAnyAddr,
                              int udp, int sctp, int ready_file, int do_listen)
{
    SOCKADDR_IN_T client_addr;
    socklen_t client_len = sizeof(client_addr);
    tcp_ready* ready = NULL;

    (void) ready; /* Account for case when "ready" is not used */

    if (udp) {
        udp_accept(sockfd, clientfd, useAnyAddr, port, args);
        return;
    }

    if(do_listen) {
        tcp_listen(sockfd, &port, useAnyAddr, udp, sctp);

    #if defined(_POSIX_THREADS) && defined(NO_MAIN_DRIVER) && !defined(__MINGW32__)
        /* signal ready to tcp_accept */
        if (args)
            ready = args->signal;
        if (ready) {
            pthread_mutex_lock(&ready->mutex);
            ready->ready = 1;
            ready->port = port;
            pthread_cond_signal(&ready->cond);
            pthread_mutex_unlock(&ready->mutex);
        }
    #elif defined (WOLFSSL_TIRTOS)
        /* Need mutex? */
        if (args)
            ready = args->signal;
        if (ready) {
            ready->ready = 1;
            ready->port = port;
        }
    #endif

        if (ready_file) {
        #if !defined(NO_FILESYSTEM) || defined(FORCE_BUFFER_TEST)
            XFILE srf = NULL;
            if (args)
                ready = args->signal;

            if (ready) {
                srf = XFOPEN(ready->srfName, "w");

                if (srf) {
                    /* let's write port sever is listening on to ready file
                       external monitor can then do ephemeral ports by passing
                       -p 0 to server on supported platforms with -R ready_file
                       client can then wait for existence of ready_file and see
                       which port the server is listening on. */
                    fprintf(srf, "%d\n", (int)port);
                    fclose(srf);
                }
            }
        #endif
        }
    }

    *clientfd = accept(*sockfd, (struct sockaddr*)&client_addr,
                      (ACCEPT_THIRD_T)&client_len);
    if(WOLFSSL_SOCKET_IS_INVALID(*clientfd)) {
        err_sys_with_errno("tcp accept failed");
    }
}


static WC_INLINE void tcp_set_nonblocking(SOCKET_T* sockfd)
{
    #ifdef USE_WINDOWS_API
        unsigned long blocking = 1;
        int ret = ioctlsocket(*sockfd, FIONBIO, &blocking);
        if (ret == SOCKET_ERROR)
            err_sys_with_errno("ioctlsocket failed");
    #elif defined(WOLFSSL_MDK_ARM) || defined(WOLFSSL_KEIL_TCP_NET) \
        || defined (WOLFSSL_TIRTOS)|| defined(WOLFSSL_VXWORKS) \
        || defined(WOLFSSL_ZEPHYR)
         /* non blocking not supported, for now */
    #else
        int flags = fcntl(*sockfd, F_GETFL, 0);
        if (flags < 0)
            err_sys_with_errno("fcntl get failed");
        flags = fcntl(*sockfd, F_SETFL, flags | O_NONBLOCK);
        if (flags < 0)
            err_sys_with_errno("fcntl set failed");
    #endif
}


#ifndef NO_PSK

/* identity is OpenSSL testing default for openssl s_client, keep same */
static const char* kIdentityStr = "Client_identity";

static WC_INLINE unsigned int my_psk_client_cb(WOLFSSL* ssl, const char* hint,
        char* identity, unsigned int id_max_len, unsigned char* key,
        unsigned int key_max_len)
{
    (void)ssl;
    (void)hint;
    (void)key_max_len;

    /* see internal.h MAX_PSK_ID_LEN for PSK identity limit */
    XSTRNCPY(identity, kIdentityStr, id_max_len);

    if (wolfSSL_GetVersion(ssl) < WOLFSSL_TLSV1_3) {
        /* test key in hex is 0x1a2b3c4d , in decimal 439,041,101 , we're using
           unsigned binary */
        key[0] = 0x1a;
        key[1] = 0x2b;
        key[2] = 0x3c;
        key[3] = 0x4d;

        return 4;   /* length of key in octets or 0 for error */
    }
    else {
        int i;
        int b = 0x01;

        for (i = 0; i < 32; i++, b += 0x22) {
            if (b >= 0x100)
                b = 0x01;
            key[i] = b;
        }

        return 32;   /* length of key in octets or 0 for error */
    }
}


static WC_INLINE unsigned int my_psk_server_cb(WOLFSSL* ssl, const char* identity,
        unsigned char* key, unsigned int key_max_len)
{
    (void)ssl;
    (void)key_max_len;

    /* see internal.h MAX_PSK_ID_LEN for PSK identity limit */
    if (XSTRNCMP(identity, kIdentityStr, XSTRLEN(kIdentityStr)) != 0)
        return 0;

    if (wolfSSL_GetVersion(ssl) < WOLFSSL_TLSV1_3) {
        /* test key in hex is 0x1a2b3c4d , in decimal 439,041,101 , we're using
           unsigned binary */
        key[0] = 0x1a;
        key[1] = 0x2b;
        key[2] = 0x3c;
        key[3] = 0x4d;

        return 4;   /* length of key in octets or 0 for error */
    }
    else {
        int i;
        int b = 0x01;

        for (i = 0; i < 32; i++, b += 0x22) {
            if (b >= 0x100)
                b = 0x01;
            key[i] = b;
        }

        return 32;   /* length of key in octets or 0 for error */
    }
}


static WC_INLINE unsigned int my_psk_client_tls13_cb(WOLFSSL* ssl,
        const char* hint, char* identity, unsigned int id_max_len,
        unsigned char* key, unsigned int key_max_len, const char** ciphersuite)
{
    int i;
    int b = 0x01;
    const char* userCipher = (const char*)wolfSSL_get_psk_callback_ctx(ssl);

    (void)ssl;
    (void)hint;
    (void)key_max_len;

    /* see internal.h MAX_PSK_ID_LEN for PSK identity limit */
    XSTRNCPY(identity, kIdentityStr, id_max_len);

    for (i = 0; i < 32; i++, b += 0x22) {
        if (b >= 0x100)
            b = 0x01;
        key[i] = b;
    }

    *ciphersuite = userCipher ? userCipher : "TLS13-AES128-GCM-SHA256";

    return 32;   /* length of key in octets or 0 for error */
}


static WC_INLINE unsigned int my_psk_server_tls13_cb(WOLFSSL* ssl,
        const char* identity, unsigned char* key, unsigned int key_max_len,
        const char** ciphersuite)
{
    int i;
    int b = 0x01;
    const char* userCipher = (const char*)wolfSSL_get_psk_callback_ctx(ssl);

    (void)ssl;
    (void)key_max_len;

    /* see internal.h MAX_PSK_ID_LEN for PSK identity limit */
    if (XSTRNCMP(identity, kIdentityStr, XSTRLEN(kIdentityStr)) != 0)
        return 0;

    for (i = 0; i < 32; i++, b += 0x22) {
        if (b >= 0x100)
            b = 0x01;
        key[i] = b;
    }

    *ciphersuite = userCipher ? userCipher : "TLS13-AES128-GCM-SHA256";

    return 32;   /* length of key in octets or 0 for error */
}

#endif /* !NO_PSK */


#if defined(WOLFSSL_USER_CURRTIME)
    extern   double current_time(int reset);

#elif defined(USE_WINDOWS_API)

    #define WIN32_LEAN_AND_MEAN
    #include <windows.h>

    static WC_INLINE double current_time(int reset)
    {
        static int init = 0;
        static LARGE_INTEGER freq;

        LARGE_INTEGER count;

        if (!init) {
            QueryPerformanceFrequency(&freq);
            init = 1;
        }

        QueryPerformanceCounter(&count);

        (void)reset;
        return (double)count.QuadPart / freq.QuadPart;
    }

#elif defined(WOLFSSL_TIRTOS)
    extern double current_time();
#elif defined(WOLFSSL_ZEPHYR)
    extern double current_time();
#else

#if !defined(WOLFSSL_MDK_ARM) && !defined(WOLFSSL_KEIL_TCP_NET) && !defined(WOLFSSL_CHIBIOS)
    #include <sys/time.h>

    static WC_INLINE double current_time(int reset)
    {
        struct timeval tv;
        gettimeofday(&tv, 0);
        (void)reset;

        return (double)tv.tv_sec + (double)tv.tv_usec / 1000000;
    }
#else
    extern double current_time(int reset);
#endif
#endif /* USE_WINDOWS_API */


#if defined(HAVE_OCSP) && defined(WOLFSSL_NONBLOCK_OCSP)
static WC_INLINE int OCSPIOCb(void* ioCtx, const char* url, int urlSz,
    unsigned char* request, int requestSz, unsigned char** response)
{
#ifdef TEST_NONBLOCK_CERTS
    static int ioCbCnt = 0;
#endif

    (void)ioCtx;
    (void)url;
    (void)urlSz;
    (void)request;
    (void)requestSz;
    (void)response;

#ifdef TEST_NONBLOCK_CERTS
    if (ioCbCnt) {
        ioCbCnt = 0;
        return EmbedOcspLookup(ioCtx, url, urlSz, request, requestSz, response);
    }
    else {
        ioCbCnt = 1;
        return WOLFSSL_CBIO_ERR_WANT_READ;
    }
#else
    return EmbedOcspLookup(ioCtx, url, urlSz, request, requestSz, response);
#endif
}

static WC_INLINE void OCSPRespFreeCb(void* ioCtx, unsigned char* response)
{
    return EmbedOcspRespFree(ioCtx, response);
}
#endif

#if !defined(NO_CERTS)
    #if !defined(NO_FILESYSTEM) || \
        (defined(NO_FILESYSTEM) && defined(FORCE_BUFFER_TEST))

    /* reads file size, allocates buffer, reads into buffer, returns buffer */
    static WC_INLINE int load_file(const char* fname, byte** buf, size_t* bufLen)
    {
        int ret;
        long int fileSz;
        XFILE lFile;

        if (fname == NULL || buf == NULL || bufLen == NULL)
            return BAD_FUNC_ARG;

        /* set defaults */
        *buf = NULL;
        *bufLen = 0;

        /* open file (read-only binary) */
        lFile = XFOPEN(fname, "rb");
        if (!lFile) {
            printf("Error loading %s\n", fname);
            return BAD_PATH_ERROR;
        }

        fseek(lFile, 0, SEEK_END);
        fileSz = (int)ftell(lFile);
        rewind(lFile);
        if (fileSz  > 0) {
            *bufLen = (size_t)fileSz;
            *buf = (byte*)malloc(*bufLen);
            if (*buf == NULL) {
                ret = MEMORY_E;
                printf("Error allocating %lu bytes\n", (unsigned long)*bufLen);
            }
            else {
                size_t readLen = fread(*buf, *bufLen, 1, lFile);

                /* check response code */
                ret = (readLen > 0) ? 0 : -1;
            }
        }
        else {
            ret = BUFFER_E;
        }
        fclose(lFile);

        return ret;
    }

    enum {
        WOLFSSL_CA   = 1,
        WOLFSSL_CERT = 2,
        WOLFSSL_KEY  = 3,
        WOLFSSL_CERT_CHAIN = 4,
    };

    static WC_INLINE void load_buffer(WOLFSSL_CTX* ctx, const char* fname, int type)
    {
        int format = WOLFSSL_FILETYPE_PEM;
        byte* buff = NULL;
        size_t sz = 0;

        if (load_file(fname, &buff, &sz) != 0) {
            err_sys("can't open file for buffer load "
                    "Please run from wolfSSL home directory if not");
        }

        /* determine format */
        if (strstr(fname, ".der"))
            format = WOLFSSL_FILETYPE_ASN1;

        if (type == WOLFSSL_CA) {
            if (wolfSSL_CTX_load_verify_buffer(ctx, buff, (long)sz, format)
                                              != WOLFSSL_SUCCESS)
                err_sys("can't load buffer ca file");
        }
        else if (type == WOLFSSL_CERT) {
            if (wolfSSL_CTX_use_certificate_buffer(ctx, buff, (long)sz,
                        format) != WOLFSSL_SUCCESS)
                err_sys("can't load buffer cert file");
        }
        else if (type == WOLFSSL_KEY) {
            if (wolfSSL_CTX_use_PrivateKey_buffer(ctx, buff, (long)sz,
                        format) != WOLFSSL_SUCCESS)
                err_sys("can't load buffer key file");
        }
        else if (type == WOLFSSL_CERT_CHAIN) {
            if (wolfSSL_CTX_use_certificate_chain_buffer_format(ctx, buff,
                    (long)sz, format) != WOLFSSL_SUCCESS)
                err_sys("can't load cert chain buffer");
        }

        if (buff)
            free(buff);
    }

    static WC_INLINE void load_ssl_buffer(WOLFSSL* ssl, const char* fname, int type)
    {
        int format = WOLFSSL_FILETYPE_PEM;
        byte* buff = NULL;
        size_t sz = 0;

        if (load_file(fname, &buff, &sz) != 0) {
            err_sys("can't open file for buffer load "
                    "Please run from wolfSSL home directory if not");
        }

        /* determine format */
        if (strstr(fname, ".der"))
            format = WOLFSSL_FILETYPE_ASN1;

        if (type == WOLFSSL_CA) {
            /* verify certs (CA's) use the shared ctx->cm (WOLFSSL_CERT_MANAGER) */
            WOLFSSL_CTX* ctx = wolfSSL_get_SSL_CTX(ssl);
            if (wolfSSL_CTX_load_verify_buffer(ctx, buff, (long)sz, format)
                                              != WOLFSSL_SUCCESS)
                err_sys("can't load buffer ca file");
        }
        else if (type == WOLFSSL_CERT) {
            if (wolfSSL_use_certificate_buffer(ssl, buff, (long)sz,
                        format) != WOLFSSL_SUCCESS)
                err_sys("can't load buffer cert file");
        }
        else if (type == WOLFSSL_KEY) {
            if (wolfSSL_use_PrivateKey_buffer(ssl, buff, (long)sz,
                        format) != WOLFSSL_SUCCESS)
                err_sys("can't load buffer key file");
        }
        else if (type == WOLFSSL_CERT_CHAIN) {
            if (wolfSSL_use_certificate_chain_buffer_format(ssl, buff,
                    (long)sz, format) != WOLFSSL_SUCCESS)
                err_sys("can't load cert chain buffer");
        }

        if (buff)
            free(buff);
    }

    #ifdef TEST_PK_PRIVKEY
    static WC_INLINE int load_key_file(const char* fname, byte** derBuf, word32* derLen)
    {
        int ret;
        byte* buf = NULL;
        size_t bufLen;

        ret = load_file(fname, &buf, &bufLen);
        if (ret != 0)
            return ret;

        *derBuf = (byte*)malloc(bufLen);
        if (*derBuf == NULL) {
            free(buf);
            return MEMORY_E;
        }

        ret = wc_KeyPemToDer(buf, (word32)bufLen, *derBuf, (word32)bufLen, NULL);
        if (ret < 0) {
            free(buf);
            free(*derBuf);
            return ret;
        }
        *derLen = ret;
        free(buf);

        return 0;
    }
    #endif /* TEST_PK_PRIVKEY */

    #endif /* !NO_FILESYSTEM || (NO_FILESYSTEM && FORCE_BUFFER_TEST) */
#endif /* !NO_CERTS */

enum {
    VERIFY_OVERRIDE_ERROR,
    VERIFY_FORCE_FAIL,
    VERIFY_USE_PREVERFIY,
    VERIFY_OVERRIDE_DATE_ERR,
};
static THREAD_LS_T int myVerifyAction = VERIFY_OVERRIDE_ERROR;

/* The verify callback is called for every certificate only when
 * --enable-opensslextra is defined because it sets WOLFSSL_ALWAYS_VERIFY_CB and
 * WOLFSSL_VERIFY_CB_ALL_CERTS.
 * Normal cases of the verify callback only occur on certificate failures when the
 * wolfSSL_set_verify(ssl, SSL_VERIFY_PEER, myVerifyCb); is called
*/

static WC_INLINE int myVerify(int preverify, WOLFSSL_X509_STORE_CTX* store)
{
    char buffer[WOLFSSL_MAX_ERROR_SZ];
#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
    WOLFSSL_X509* peer;
#if defined(SHOW_CERTS) && !defined(NO_FILESYSTEM)
    WOLFSSL_BIO* bio = NULL;
    WOLFSSL_STACK* sk = NULL;
    X509* x509 = NULL;
    int i = 0;
#endif
#endif
    (void)preverify;

    /* Verify Callback Arguments:
     * preverify:           1=Verify Okay, 0=Failure
     * store->error:        Failure error code (0 indicates no failure)
     * store->current_cert: Current WOLFSSL_X509 object (only with OPENSSL_EXTRA)
     * store->error_depth:  Current Index
     * store->domain:       Subject CN as string (null term)
     * store->totalCerts:   Number of certs presented by peer
     * store->certs[i]:     A `WOLFSSL_BUFFER_INFO` with plain DER for each cert
     * store->store:        WOLFSSL_X509_STORE with CA cert chain
     * store->store->cm:    WOLFSSL_CERT_MANAGER
     * store->ex_data:      The WOLFSSL object pointer
     * store->discardSessionCerts: When set to non-zero value session certs
        will be discarded (only with SESSION_CERTS)
     */

    printf("In verification callback, error = %d, %s\n", store->error,
                                 wolfSSL_ERR_error_string(store->error, buffer));
#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
    peer = store->current_cert;
    if (peer) {
        char* issuer  = wolfSSL_X509_NAME_oneline(
                                       wolfSSL_X509_get_issuer_name(peer), 0, 0);
        char* subject = wolfSSL_X509_NAME_oneline(
                                      wolfSSL_X509_get_subject_name(peer), 0, 0);
        printf("\tPeer's cert info:\n issuer : %s\n subject: %s\n", issuer,
                                                                  subject);
        XFREE(subject, 0, DYNAMIC_TYPE_OPENSSL);
        XFREE(issuer,  0, DYNAMIC_TYPE_OPENSSL);
#if defined(SHOW_CERTS) && !defined(NO_FILESYSTEM)
        /* avoid printing duplicate certs */
        if (store->depth == 1) {
            /* retrieve x509 certs and display them on stdout */
            sk = wolfSSL_X509_STORE_GetCerts(store);

            for (i = 0; i < wolfSSL_sk_X509_num(sk); i++) {
                x509 = wolfSSL_sk_X509_value(sk, i);
                bio = wolfSSL_BIO_new(wolfSSL_BIO_s_file());
                if (bio != NULL) {
                    wolfSSL_BIO_set_fp(bio, stdout, BIO_NOCLOSE);
                    wolfSSL_X509_print(bio, x509);
                    wolfSSL_BIO_free(bio);
                }
            }
            wolfSSL_sk_X509_free(sk);
        }
#endif
    }
    else
        printf("\tPeer has no cert!\n");
#else
    printf("\tPeer certs: %d\n", store->totalCerts);
    #ifdef SHOW_CERTS
    {   int i;
        for (i=0; i<store->totalCerts; i++) {
            WOLFSSL_BUFFER_INFO* cert = &store->certs[i];
            printf("\t\tCert %d: Ptr %p, Len %u\n", i, cert->buffer, cert->length);
        }
    }
    #endif /* SHOW_CERTS */
#endif /* OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL */

    printf("\tSubject's domain name at %d is %s\n", store->error_depth, store->domain);

    /* Testing forced fail case by return zero */
    if (myVerifyAction == VERIFY_FORCE_FAIL) {
        return 0; /* test failure case */
    }

    if (myVerifyAction == VERIFY_OVERRIDE_DATE_ERR && 
        (store->error == ASN_BEFORE_DATE_E || store->error == ASN_AFTER_DATE_E)) {
        printf("Overriding cert date error as example for bad clock testing\n");
        return 1;
    }

    /* If error indicate we are overriding it for testing purposes */
    if (store->error != 0 && myVerifyAction == VERIFY_OVERRIDE_ERROR) {
        printf("\tAllowing failed certificate check, testing only "
            "(shouldn't do this in production)\n");
    }

    /* A non-zero return code indicates failure override */
    return (myVerifyAction == VERIFY_OVERRIDE_ERROR) ? 1 : preverify;
}


#ifdef HAVE_EXT_CACHE

static WC_INLINE WOLFSSL_SESSION* mySessGetCb(WOLFSSL* ssl, unsigned char* id,
    int id_len, int* copy)
{
    (void)ssl;
    (void)id;
    (void)id_len;
    (void)copy;

    /* using internal cache, this is for testing only */
    return NULL;
}

static WC_INLINE int mySessNewCb(WOLFSSL* ssl, WOLFSSL_SESSION* session)
{
    (void)ssl;
    (void)session;

    /* using internal cache, this is for testing only */
    return 0;
}

static WC_INLINE void mySessRemCb(WOLFSSL_CTX* ctx, WOLFSSL_SESSION* session)
{
    (void)ctx;
    (void)session;

    /* using internal cache, this is for testing only */
}

#endif /* HAVE_EXT_CACHE */


#ifdef HAVE_CRL

static WC_INLINE void CRL_CallBack(const char* url)
{
    printf("CRL callback url = %s\n", url);
}

#endif

#ifndef NO_DH
static WC_INLINE void SetDH(WOLFSSL* ssl)
{
    /* dh1024 p */
    static const unsigned char p[] =
    {
        0xE6, 0x96, 0x9D, 0x3D, 0x49, 0x5B, 0xE3, 0x2C, 0x7C, 0xF1, 0x80, 0xC3,
        0xBD, 0xD4, 0x79, 0x8E, 0x91, 0xB7, 0x81, 0x82, 0x51, 0xBB, 0x05, 0x5E,
        0x2A, 0x20, 0x64, 0x90, 0x4A, 0x79, 0xA7, 0x70, 0xFA, 0x15, 0xA2, 0x59,
        0xCB, 0xD5, 0x23, 0xA6, 0xA6, 0xEF, 0x09, 0xC4, 0x30, 0x48, 0xD5, 0xA2,
        0x2F, 0x97, 0x1F, 0x3C, 0x20, 0x12, 0x9B, 0x48, 0x00, 0x0E, 0x6E, 0xDD,
        0x06, 0x1C, 0xBC, 0x05, 0x3E, 0x37, 0x1D, 0x79, 0x4E, 0x53, 0x27, 0xDF,
        0x61, 0x1E, 0xBB, 0xBE, 0x1B, 0xAC, 0x9B, 0x5C, 0x60, 0x44, 0xCF, 0x02,
        0x3D, 0x76, 0xE0, 0x5E, 0xEA, 0x9B, 0xAD, 0x99, 0x1B, 0x13, 0xA6, 0x3C,
        0x97, 0x4E, 0x9E, 0xF1, 0x83, 0x9E, 0xB5, 0xDB, 0x12, 0x51, 0x36, 0xF7,
        0x26, 0x2E, 0x56, 0xA8, 0x87, 0x15, 0x38, 0xDF, 0xD8, 0x23, 0xC6, 0x50,
        0x50, 0x85, 0xE2, 0x1F, 0x0D, 0xD5, 0xC8, 0x6B,
    };

    /* dh1024 g */
    static const unsigned char g[] =
    {
      0x02,
    };

    wolfSSL_SetTmpDH(ssl, p, sizeof(p), g, sizeof(g));
}

static WC_INLINE void SetDHCtx(WOLFSSL_CTX* ctx)
{
    /* dh1024 p */
    static const unsigned char p[] =
    {
        0xE6, 0x96, 0x9D, 0x3D, 0x49, 0x5B, 0xE3, 0x2C, 0x7C, 0xF1, 0x80, 0xC3,
        0xBD, 0xD4, 0x79, 0x8E, 0x91, 0xB7, 0x81, 0x82, 0x51, 0xBB, 0x05, 0x5E,
        0x2A, 0x20, 0x64, 0x90, 0x4A, 0x79, 0xA7, 0x70, 0xFA, 0x15, 0xA2, 0x59,
        0xCB, 0xD5, 0x23, 0xA6, 0xA6, 0xEF, 0x09, 0xC4, 0x30, 0x48, 0xD5, 0xA2,
        0x2F, 0x97, 0x1F, 0x3C, 0x20, 0x12, 0x9B, 0x48, 0x00, 0x0E, 0x6E, 0xDD,
        0x06, 0x1C, 0xBC, 0x05, 0x3E, 0x37, 0x1D, 0x79, 0x4E, 0x53, 0x27, 0xDF,
        0x61, 0x1E, 0xBB, 0xBE, 0x1B, 0xAC, 0x9B, 0x5C, 0x60, 0x44, 0xCF, 0x02,
        0x3D, 0x76, 0xE0, 0x5E, 0xEA, 0x9B, 0xAD, 0x99, 0x1B, 0x13, 0xA6, 0x3C,
        0x97, 0x4E, 0x9E, 0xF1, 0x83, 0x9E, 0xB5, 0xDB, 0x12, 0x51, 0x36, 0xF7,
        0x26, 0x2E, 0x56, 0xA8, 0x87, 0x15, 0x38, 0xDF, 0xD8, 0x23, 0xC6, 0x50,
        0x50, 0x85, 0xE2, 0x1F, 0x0D, 0xD5, 0xC8, 0x6B,
    };

    /* dh1024 g */
    static const unsigned char g[] =
    {
      0x02,
    };

    wolfSSL_CTX_SetTmpDH(ctx, p, sizeof(p), g, sizeof(g));
}
#endif /* NO_DH */

#ifndef NO_CERTS

static WC_INLINE void CaCb(unsigned char* der, int sz, int type)
{
    (void)der;
    printf("Got CA cache add callback, derSz = %d, type = %d\n", sz, type);
}

#endif /* !NO_CERTS */


/* Wolf Root Directory Helper */
/* KEIL-RL File System does not support relative directory */
#if !defined(WOLFSSL_MDK_ARM) && !defined(WOLFSSL_KEIL_FS) && !defined(WOLFSSL_TIRTOS)
    /* Maximum depth to search for WolfSSL root */
    #define MAX_WOLF_ROOT_DEPTH 5

    static WC_INLINE int ChangeToWolfRoot(void)
    {
        #if !defined(NO_FILESYSTEM) || defined(FORCE_BUFFER_TEST)
            int depth, res;
            XFILE keyFile;
            for(depth = 0; depth <= MAX_WOLF_ROOT_DEPTH; depth++) {
                keyFile = XFOPEN(ntruKeyFile, "rb");
                if (keyFile != NULL) {
                    fclose(keyFile);
                    return depth;
                }
            #ifdef USE_WINDOWS_API
                res = SetCurrentDirectoryA("..\\");
            #else
                res = chdir("../");
            #endif
                if (res < 0) {
                    printf("chdir to ../ failed!\n");
                    break;
                }
            }

            err_sys("wolf root not found");
            return -1;
        #else
            return 0;
        #endif
    }
#endif /* !defined(WOLFSSL_MDK_ARM) && !defined(WOLFSSL_KEIL_FS) && !defined(WOLFSSL_TIRTOS) */

#ifdef HAVE_STACK_SIZE

typedef THREAD_RETURN WOLFSSL_THREAD (*thread_func)(void* args);
#define STACK_CHECK_VAL 0x01

struct stack_size_debug_context {
  unsigned char *myStack;
  size_t stackSize;
#ifdef HAVE_STACK_SIZE_VERBOSE
  size_t *stackSizeHWM_ptr;
  thread_func fn;
  void *args;
#endif
};

#ifdef HAVE_STACK_SIZE_VERBOSE

/* per-subtest stack high water mark tracking.
 *
 * enable with
 *
 * ./configure --enable-stacksize=verbose [...]
 */

static THREAD_RETURN debug_stack_size_verbose_shim(struct stack_size_debug_context *shim_args) {
  StackSizeCheck_myStack = shim_args->myStack;
  StackSizeCheck_stackSize = shim_args->stackSize;
  StackSizeCheck_stackSizeHWM_ptr = shim_args->stackSizeHWM_ptr;
  return shim_args->fn(shim_args->args);
}

static WC_INLINE int StackSizeSetOffset(const char *funcname, void *p)
{
    if (StackSizeCheck_myStack == NULL)
        return -BAD_FUNC_ARG;

    StackSizeCheck_stackOffsetPointer = p;

    printf("setting stack relative offset reference mark in %s to +%lu\n",
        funcname, (unsigned long)((char*)(StackSizeCheck_myStack +
                                  StackSizeCheck_stackSize) - (char *)p));

    return 0;
}

static WC_INLINE ssize_t StackSizeHWM(void)
{
    size_t i;
    ssize_t used;

    if (StackSizeCheck_myStack == NULL)
        return -BAD_FUNC_ARG;

    for (i = 0; i < StackSizeCheck_stackSize; i++) {
        if (StackSizeCheck_myStack[i] != STACK_CHECK_VAL) {
            break;
        }
    }

    used = StackSizeCheck_stackSize - i;
    if ((ssize_t)*StackSizeCheck_stackSizeHWM_ptr < used)
      *StackSizeCheck_stackSizeHWM_ptr = used;

    return used;
}

static WC_INLINE ssize_t StackSizeHWM_OffsetCorrected(void)
{
    ssize_t used = StackSizeHWM();
    if (used < 0)
        return used;
    if (StackSizeCheck_stackOffsetPointer)
        used -= (ssize_t)(((char *)StackSizeCheck_myStack + StackSizeCheck_stackSize) - (char *)StackSizeCheck_stackOffsetPointer);
    return used;
}

static
#ifdef __GNUC__
__attribute__((unused)) __attribute__((noinline))
#endif
int StackSizeHWMReset(void)
{
    volatile ssize_t i;

    if (StackSizeCheck_myStack == NULL)
        return -BAD_FUNC_ARG;

    for (i = (ssize_t)((char *)&i - (char *)StackSizeCheck_myStack) - (ssize_t)sizeof i - 1; i >= 0; --i)
    {
        StackSizeCheck_myStack[i] = STACK_CHECK_VAL;
    }

    return 0;
}

#define STACK_SIZE_CHECKPOINT(...) ({  \
    ssize_t HWM = StackSizeHWM_OffsetCorrected();    \
    __VA_ARGS__;                                     \
    printf("relative stack used = %ld\n", HWM);      \
    StackSizeHWMReset();                             \
    })

#define STACK_SIZE_CHECKPOINT_WITH_MAX_CHECK(max, ...) ({  \
    ssize_t HWM = StackSizeHWM_OffsetCorrected();    \
    int _ret;                                        \
    __VA_ARGS__;                                     \
    printf("relative stack used = %ld\n", HWM);      \
    _ret = StackSizeHWMReset();                      \
    if ((max >= 0) && (HWM > (ssize_t)(max))) {      \
        printf("relative stack usage at %s L%d exceeds designated max %ld.\n", __FILE__, __LINE__, (ssize_t)(max)); \
        _ret = -1;                                   \
    }                                                \
    _ret;                                            \
    })


#ifdef __GNUC__
#define STACK_SIZE_INIT() (void)StackSizeSetOffset(__FUNCTION__, __builtin_frame_address(0))
#endif

#endif /* HAVE_STACK_SIZE_VERBOSE */

static WC_INLINE int StackSizeCheck(func_args* args, thread_func tf)
{
    size_t         i;
    int            ret;
    void*          status;
    unsigned char* myStack = NULL;
    size_t         stackSize = 1024*1024;
    pthread_attr_t myAttr;
    pthread_t      threadId;
#ifdef HAVE_STACK_SIZE_VERBOSE
    struct stack_size_debug_context shim_args;
#endif

#ifdef PTHREAD_STACK_MIN
    if (stackSize < PTHREAD_STACK_MIN)
        stackSize = PTHREAD_STACK_MIN;
#endif

    ret = posix_memalign((void**)&myStack, sysconf(_SC_PAGESIZE), stackSize);
    if (ret != 0 || myStack == NULL)
        err_sys_with_errno("posix_memalign failed\n");

    XMEMSET(myStack, STACK_CHECK_VAL, stackSize);

    ret = pthread_attr_init(&myAttr);
    if (ret != 0)
        err_sys("attr_init failed");

    ret = pthread_attr_setstack(&myAttr, myStack, stackSize);
    if (ret != 0)
        err_sys("attr_setstackaddr failed");

#ifdef HAVE_STACK_SIZE_VERBOSE
    StackSizeCheck_stackSizeHWM = 0;
    shim_args.myStack = myStack;
    shim_args.stackSize = stackSize;
    shim_args.stackSizeHWM_ptr = &StackSizeCheck_stackSizeHWM;
    shim_args.fn = tf;
    shim_args.args = args;
    ret = pthread_create(&threadId, &myAttr, (thread_func)debug_stack_size_verbose_shim, (void *)&shim_args);
#else
    ret = pthread_create(&threadId, &myAttr, tf, args);
#endif
    if (ret != 0) {
        perror("pthread_create failed");
        exit(EXIT_FAILURE);
    }

    ret = pthread_join(threadId, &status);
    if (ret != 0)
        err_sys("pthread_join failed");

    for (i = 0; i < stackSize; i++) {
        if (myStack[i] != STACK_CHECK_VAL) {
            break;
        }
    }

    free(myStack);
#ifdef HAVE_STACK_SIZE_VERBOSE
    printf("stack used = %lu\n", StackSizeCheck_stackSizeHWM > (stackSize - i)
        ? (unsigned long)StackSizeCheck_stackSizeHWM
        : (unsigned long)(stackSize - i));
#else
    {
      size_t used = stackSize - i;
      printf("stack used = %lu\n", (unsigned long)used);
    }
#endif

    return (int)((size_t)status);
}

static WC_INLINE int StackSizeCheck_launch(func_args* args, thread_func tf, pthread_t *threadId, void **stack_context)
{
    int ret;
    unsigned char* myStack = NULL;
    size_t stackSize = 1024*1024;
    pthread_attr_t myAttr;

#ifdef PTHREAD_STACK_MIN
    if (stackSize < PTHREAD_STACK_MIN)
        stackSize = PTHREAD_STACK_MIN;
#endif

    struct stack_size_debug_context *shim_args = (struct stack_size_debug_context *)malloc(sizeof *shim_args);
    if (! shim_args) {
        perror("malloc");
        exit(EXIT_FAILURE);
    }

    ret = posix_memalign((void**)&myStack, sysconf(_SC_PAGESIZE), stackSize);
    if (ret != 0 || myStack == NULL)
        err_sys_with_errno("posix_memalign failed\n");

    XMEMSET(myStack, STACK_CHECK_VAL, stackSize);

    ret = pthread_attr_init(&myAttr);
    if (ret != 0)
        err_sys("attr_init failed");

    ret = pthread_attr_setstack(&myAttr, myStack, stackSize);
    if (ret != 0)
        err_sys("attr_setstackaddr failed");

    shim_args->myStack = myStack;
    shim_args->stackSize = stackSize;
#ifdef HAVE_STACK_SIZE_VERBOSE
    shim_args->stackSizeHWM_ptr = &StackSizeCheck_stackSizeHWM;
    shim_args->fn = tf;
    shim_args->args = args;
    ret = pthread_create(threadId, &myAttr, (thread_func)debug_stack_size_verbose_shim, (void *)shim_args);
#else
    ret = pthread_create(threadId, &myAttr, tf, args);
#endif
    if (ret != 0) {
        fprintf(stderr,"pthread_create failed: %s",strerror(ret));
        exit(EXIT_FAILURE);
    }

    *stack_context = (void *)shim_args;

    return 0;
}

static WC_INLINE int StackSizeCheck_reap(pthread_t threadId, void *stack_context)
{
    struct stack_size_debug_context *shim_args = (struct stack_size_debug_context *)stack_context;
    size_t i;
    void *status;
    int ret = pthread_join(threadId, &status);
    if (ret != 0)
        err_sys("pthread_join failed");

    for (i = 0; i < shim_args->stackSize; i++) {
        if (shim_args->myStack[i] != STACK_CHECK_VAL) {
            break;
        }
    }

    free(shim_args->myStack);
#ifdef HAVE_STACK_SIZE_VERBOSE
    printf("stack used = %lu\n",
        *shim_args->stackSizeHWM_ptr > (shim_args->stackSize - i)
        ? (unsigned long)*shim_args->stackSizeHWM_ptr
        : (unsigned long)(shim_args->stackSize - i));
#else
    {
      size_t used = shim_args->stackSize - i;
      printf("stack used = %lu\n", (unsigned long)used);
    }
#endif
    free(shim_args);

    return (int)((size_t)status);
}


#endif /* HAVE_STACK_SIZE */

#ifndef STACK_SIZE_CHECKPOINT
#define STACK_SIZE_CHECKPOINT(...) (__VA_ARGS__)
#endif
#ifndef STACK_SIZE_INIT
#define STACK_SIZE_INIT()
#endif

#ifdef STACK_TRAP

/* good settings
   --enable-debug --disable-shared C_EXTRA_FLAGS="-DUSER_TIME -DTFM_TIMING_RESISTANT -DPOSITIVE_EXP_ONLY -DSTACK_TRAP"

*/

#ifdef HAVE_STACK_SIZE
    /* client only for now, setrlimit will fail if pthread_create() called */
    /* STACK_SIZE does pthread_create() on client */
    #error "can't use STACK_TRAP with STACK_SIZE, setrlimit will fail"
#endif /* HAVE_STACK_SIZE */

static WC_INLINE void StackTrap(void)
{
    struct rlimit  rl;
    if (getrlimit(RLIMIT_STACK, &rl) != 0)
        err_sys_with_errno("getrlimit failed");
    printf("rlim_cur = %llu\n", rl.rlim_cur);
    rl.rlim_cur = 1024*21;  /* adjust trap size here */
    if (setrlimit(RLIMIT_STACK, &rl) != 0)
        err_sys_with_errno("setrlimit failed");
}

#else /* STACK_TRAP */

static WC_INLINE void StackTrap(void)
{
}

#endif /* STACK_TRAP */


#if defined(ATOMIC_USER) && !defined(WOLFSSL_AEAD_ONLY)

/* Atomic Encrypt Context example */
typedef struct AtomicEncCtx {
    int  keySetup;           /* have we done key setup yet */
    Aes  aes;                /* for aes example */
} AtomicEncCtx;


/* Atomic Decrypt Context example */
typedef struct AtomicDecCtx {
    int  keySetup;           /* have we done key setup yet */
    Aes  aes;                /* for aes example */
} AtomicDecCtx;


static WC_INLINE int myMacEncryptCb(WOLFSSL* ssl, unsigned char* macOut,
       const unsigned char* macIn, unsigned int macInSz, int macContent,
       int macVerify, unsigned char* encOut, const unsigned char* encIn,
       unsigned int encSz, void* ctx)
{
    int  ret;
    Hmac hmac;
    byte myInner[WOLFSSL_TLS_HMAC_INNER_SZ];
    AtomicEncCtx* encCtx = (AtomicEncCtx*)ctx;
    const char* tlsStr = "TLS";

    /* example supports (d)tls aes */
    if (wolfSSL_GetBulkCipher(ssl) != wolfssl_aes) {
        printf("myMacEncryptCb not using AES\n");
        return -1;
    }

    if (strstr(wolfSSL_get_version(ssl), tlsStr) == NULL) {
        printf("myMacEncryptCb not using (D)TLS\n");
        return -1;
    }

    /* hmac, not needed if aead mode */
    wolfSSL_SetTlsHmacInner(ssl, myInner, macInSz, macContent, macVerify);

    ret = wc_HmacInit(&hmac, NULL, INVALID_DEVID);
    if (ret != 0)
        return ret;
    ret = wc_HmacSetKey(&hmac, wolfSSL_GetHmacType(ssl),
               wolfSSL_GetMacSecret(ssl, macVerify), wolfSSL_GetHmacSize(ssl));
    if (ret != 0)
        return ret;
    ret = wc_HmacUpdate(&hmac, myInner, sizeof(myInner));
    if (ret != 0)
        return ret;
    ret = wc_HmacUpdate(&hmac, macIn, macInSz);
    if (ret != 0)
        return ret;
    ret = wc_HmacFinal(&hmac, macOut);
    if (ret != 0)
        return ret;


    /* encrypt setup on first time */
    if (encCtx->keySetup == 0) {
        int   keyLen = wolfSSL_GetKeySize(ssl);
        const byte* key;
        const byte* iv;

        if (wolfSSL_GetSide(ssl) == WOLFSSL_CLIENT_END) {
            key = wolfSSL_GetClientWriteKey(ssl);
            iv  = wolfSSL_GetClientWriteIV(ssl);
        }
        else {
            key = wolfSSL_GetServerWriteKey(ssl);
            iv  = wolfSSL_GetServerWriteIV(ssl);
        }

        ret = wc_AesSetKey(&encCtx->aes, key, keyLen, iv, AES_ENCRYPTION);
        if (ret != 0) {
            printf("AesSetKey failed in myMacEncryptCb\n");
            return ret;
        }
        encCtx->keySetup = 1;
    }

    /* encrypt */
    return wc_AesCbcEncrypt(&encCtx->aes, encOut, encIn, encSz);
}


static WC_INLINE int myDecryptVerifyCb(WOLFSSL* ssl,
       unsigned char* decOut, const unsigned char* decIn,
       unsigned int decSz, int macContent, int macVerify,
       unsigned int* padSz, void* ctx)
{
    AtomicDecCtx* decCtx = (AtomicDecCtx*)ctx;
    int ret      = 0;
    int macInSz  = 0;
    int ivExtra  = 0;
    int digestSz = wolfSSL_GetHmacSize(ssl);
    unsigned int pad     = 0;
    unsigned int padByte = 0;
    Hmac hmac;
    byte myInner[WOLFSSL_TLS_HMAC_INNER_SZ];
    byte verify[WC_MAX_DIGEST_SIZE];
    const char* tlsStr = "TLS";

    /* example supports (d)tls aes */
    if (wolfSSL_GetBulkCipher(ssl) != wolfssl_aes) {
        printf("myMacEncryptCb not using AES\n");
        return -1;
    }

    if (strstr(wolfSSL_get_version(ssl), tlsStr) == NULL) {
        printf("myMacEncryptCb not using (D)TLS\n");
        return -1;
    }

    /*decrypt */
    if (decCtx->keySetup == 0) {
        int   keyLen = wolfSSL_GetKeySize(ssl);
        const byte* key;
        const byte* iv;

        /* decrypt is from other side (peer) */
        if (wolfSSL_GetSide(ssl) == WOLFSSL_SERVER_END) {
            key = wolfSSL_GetClientWriteKey(ssl);
            iv  = wolfSSL_GetClientWriteIV(ssl);
        }
        else {
            key = wolfSSL_GetServerWriteKey(ssl);
            iv  = wolfSSL_GetServerWriteIV(ssl);
        }

        ret = wc_AesSetKey(&decCtx->aes, key, keyLen, iv, AES_DECRYPTION);
        if (ret != 0) {
            printf("AesSetKey failed in myDecryptVerifyCb\n");
            return ret;
        }
        decCtx->keySetup = 1;
    }

    /* decrypt */
    ret = wc_AesCbcDecrypt(&decCtx->aes, decOut, decIn, decSz);
    if (ret != 0)
        return ret;

    if (wolfSSL_GetCipherType(ssl) == WOLFSSL_AEAD_TYPE) {
        *padSz = wolfSSL_GetAeadMacSize(ssl);
        return 0; /* hmac, not needed if aead mode */
    }

    if (wolfSSL_GetCipherType(ssl) == WOLFSSL_BLOCK_TYPE) {
        pad     = *(decOut + decSz - 1);
        padByte = 1;
        if (wolfSSL_IsTLSv1_1(ssl))
            ivExtra = wolfSSL_GetCipherBlockSize(ssl);
    }

    *padSz  = wolfSSL_GetHmacSize(ssl) + pad + padByte;
    macInSz = decSz - ivExtra - digestSz - pad - padByte;

    wolfSSL_SetTlsHmacInner(ssl, myInner, macInSz, macContent, macVerify);

    ret = wc_HmacInit(&hmac, NULL, INVALID_DEVID);
    if (ret != 0)
        return ret;
    ret = wc_HmacSetKey(&hmac, wolfSSL_GetHmacType(ssl),
               wolfSSL_GetMacSecret(ssl, macVerify), digestSz);
    if (ret != 0)
        return ret;
    ret = wc_HmacUpdate(&hmac, myInner, sizeof(myInner));
    if (ret != 0)
        return ret;
    ret = wc_HmacUpdate(&hmac, decOut + ivExtra, macInSz);
    if (ret != 0)
        return ret;
    ret = wc_HmacFinal(&hmac, verify);
    if (ret != 0)
        return ret;

    if (XMEMCMP(verify, decOut + decSz - digestSz - pad - padByte,
               digestSz) != 0) {
        printf("myDecryptVerify verify failed\n");
        return -1;
    }

    return ret;
}

#if defined(HAVE_ENCRYPT_THEN_MAC)

static WC_INLINE int myEncryptMacCb(WOLFSSL* ssl, unsigned char* macOut,
       int content, int macVerify, unsigned char* encOut,
       const unsigned char* encIn, unsigned int encSz, void* ctx)
{
    int  ret;
    Hmac hmac;
    AtomicEncCtx* encCtx = (AtomicEncCtx*)ctx;
    byte myInner[WOLFSSL_TLS_HMAC_INNER_SZ];
    const char* tlsStr = "TLS";

    /* example supports (d)tls aes */
    if (wolfSSL_GetBulkCipher(ssl) != wolfssl_aes) {
        printf("myMacEncryptCb not using AES\n");
        return -1;
    }

    if (strstr(wolfSSL_get_version(ssl), tlsStr) == NULL) {
        printf("myMacEncryptCb not using (D)TLS\n");
        return -1;
    }

    /* encrypt setup on first time */
    if (encCtx->keySetup == 0) {
        int   keyLen = wolfSSL_GetKeySize(ssl);
        const byte* key;
        const byte* iv;

        if (wolfSSL_GetSide(ssl) == WOLFSSL_CLIENT_END) {
            key = wolfSSL_GetClientWriteKey(ssl);
            iv  = wolfSSL_GetClientWriteIV(ssl);
        }
        else {
            key = wolfSSL_GetServerWriteKey(ssl);
            iv  = wolfSSL_GetServerWriteIV(ssl);
        }

        ret = wc_AesSetKey(&encCtx->aes, key, keyLen, iv, AES_ENCRYPTION);
        if (ret != 0) {
            printf("AesSetKey failed in myMacEncryptCb\n");
            return ret;
        }
        encCtx->keySetup = 1;
    }

    /* encrypt */
    ret = wc_AesCbcEncrypt(&encCtx->aes, encOut, encIn, encSz);
    if (ret != 0)
        return ret;

    /* Reconstruct record header. */
    wolfSSL_SetTlsHmacInner(ssl, myInner, encSz, content, macVerify);

    ret = wc_HmacInit(&hmac, NULL, INVALID_DEVID);
    if (ret != 0)
        return ret;
    ret = wc_HmacSetKey(&hmac, wolfSSL_GetHmacType(ssl),
               wolfSSL_GetMacSecret(ssl, macVerify), wolfSSL_GetHmacSize(ssl));
    if (ret != 0)
        return ret;
    ret = wc_HmacUpdate(&hmac, myInner, sizeof(myInner));
    if (ret != 0)
        return ret;
    ret = wc_HmacUpdate(&hmac, encOut, encSz);
    if (ret != 0)
        return ret;
    return wc_HmacFinal(&hmac, macOut);
}


static WC_INLINE int myVerifyDecryptCb(WOLFSSL* ssl,
       unsigned char* decOut, const unsigned char* decIn,
       unsigned int decSz, int content, int macVerify,
       unsigned int* padSz, void* ctx)
{
    AtomicDecCtx* decCtx = (AtomicDecCtx*)ctx;
    int ret      = 0;
    int digestSz = wolfSSL_GetHmacSize(ssl);
    Hmac hmac;
    byte myInner[WOLFSSL_TLS_HMAC_INNER_SZ];
    byte verify[WC_MAX_DIGEST_SIZE];
    const char* tlsStr = "TLS";

    /* example supports (d)tls aes */
    if (wolfSSL_GetBulkCipher(ssl) != wolfssl_aes) {
        printf("myMacEncryptCb not using AES\n");
        return -1;
    }

    if (strstr(wolfSSL_get_version(ssl), tlsStr) == NULL) {
        printf("myMacEncryptCb not using (D)TLS\n");
        return -1;
    }

    /* Reconstruct record header. */
    wolfSSL_SetTlsHmacInner(ssl, myInner, decSz, content, macVerify);

    ret = wc_HmacInit(&hmac, NULL, INVALID_DEVID);
    if (ret != 0)
        return ret;
    ret = wc_HmacSetKey(&hmac, wolfSSL_GetHmacType(ssl),
               wolfSSL_GetMacSecret(ssl, macVerify), digestSz);
    if (ret != 0)
        return ret;
    ret = wc_HmacUpdate(&hmac, myInner, sizeof(myInner));
    if (ret != 0)
        return ret;
    ret = wc_HmacUpdate(&hmac, decIn, decSz);
    if (ret != 0)
        return ret;
    ret = wc_HmacFinal(&hmac, verify);
    if (ret != 0)
        return ret;

    if (XMEMCMP(verify, decOut + decSz, digestSz) != 0) {
        printf("myDecryptVerify verify failed\n");
        return -1;
    }

    /* decrypt */
    if (decCtx->keySetup == 0) {
        int   keyLen = wolfSSL_GetKeySize(ssl);
        const byte* key;
        const byte* iv;

        /* decrypt is from other side (peer) */
        if (wolfSSL_GetSide(ssl) == WOLFSSL_SERVER_END) {
            key = wolfSSL_GetClientWriteKey(ssl);
            iv  = wolfSSL_GetClientWriteIV(ssl);
        }
        else {
            key = wolfSSL_GetServerWriteKey(ssl);
            iv  = wolfSSL_GetServerWriteIV(ssl);
        }

        ret = wc_AesSetKey(&decCtx->aes, key, keyLen, iv, AES_DECRYPTION);
        if (ret != 0) {
            printf("AesSetKey failed in myDecryptVerifyCb\n");
            return ret;
        }
        decCtx->keySetup = 1;
    }

    /* decrypt */
    ret = wc_AesCbcDecrypt(&decCtx->aes, decOut, decIn, decSz);
    if (ret != 0)
        return ret;

    *padSz  = *(decOut + decSz - 1) + 1;

    return 0;
}

#endif


static WC_INLINE void SetupAtomicUser(WOLFSSL_CTX* ctx, WOLFSSL* ssl)
{
    AtomicEncCtx* encCtx;
    AtomicDecCtx* decCtx;

    encCtx = (AtomicEncCtx*)malloc(sizeof(AtomicEncCtx));
    if (encCtx == NULL)
        err_sys_with_errno("AtomicEncCtx malloc failed");
    XMEMSET(encCtx, 0, sizeof(AtomicEncCtx));

    decCtx = (AtomicDecCtx*)malloc(sizeof(AtomicDecCtx));
    if (decCtx == NULL) {
        free(encCtx);
        err_sys_with_errno("AtomicDecCtx malloc failed");
    }
    XMEMSET(decCtx, 0, sizeof(AtomicDecCtx));

    wolfSSL_CTX_SetMacEncryptCb(ctx, myMacEncryptCb);
    wolfSSL_SetMacEncryptCtx(ssl, encCtx);

    wolfSSL_CTX_SetDecryptVerifyCb(ctx, myDecryptVerifyCb);
    wolfSSL_SetDecryptVerifyCtx(ssl, decCtx);

#if defined(HAVE_ENCRYPT_THEN_MAC)
    wolfSSL_CTX_SetEncryptMacCb(ctx, myEncryptMacCb);
    wolfSSL_SetEncryptMacCtx(ssl, encCtx);

    wolfSSL_CTX_SetVerifyDecryptCb(ctx, myVerifyDecryptCb);
    wolfSSL_SetVerifyDecryptCtx(ssl, decCtx);
#endif
}


static WC_INLINE void FreeAtomicUser(WOLFSSL* ssl)
{
    AtomicEncCtx* encCtx = (AtomicEncCtx*)wolfSSL_GetMacEncryptCtx(ssl);
    AtomicDecCtx* decCtx = (AtomicDecCtx*)wolfSSL_GetDecryptVerifyCtx(ssl);

    /* Encrypt-Then-MAC callbacks use same contexts. */

    free(decCtx);
    free(encCtx);
}

#endif /* ATOMIC_USER */

#ifdef WOLFSSL_STATIC_MEMORY
static WC_INLINE int wolfSSL_PrintStats(WOLFSSL_MEM_STATS* stats)
{
    word16 i;

    if (stats == NULL) {
        return 0;
    }

    /* print to stderr so is on the same pipe as WOLFSSL_DEBUG */
    fprintf(stderr, "Total mallocs   = %d\n", stats->totalAlloc);
    fprintf(stderr, "Total frees     = %d\n", stats->totalFr);
    fprintf(stderr, "Current mallocs = %d\n", stats->curAlloc);
    fprintf(stderr, "Available IO    = %d\n", stats->avaIO);
    fprintf(stderr, "Max con. handshakes  = %d\n", stats->maxHa);
    fprintf(stderr, "Max con. IO          = %d\n", stats->maxIO);
    fprintf(stderr, "State of memory blocks: size   : available \n");
    for (i = 0; i < WOLFMEM_MAX_BUCKETS; i++) {
       fprintf(stderr, "                      : %d\t : %d\n", stats->blockSz[i],
                                                            stats->avaBlock[i]);
    }

    return 1;
}
#endif /* WOLFSSL_STATIC_MEMORY */

#ifdef HAVE_PK_CALLBACKS

typedef struct PkCbInfo {
    const char* ourKey;
#ifdef TEST_PK_PRIVKEY
    union {
    #ifdef HAVE_ECC
        ecc_key ecc;
    #endif
    #ifdef HAVE_CURVE25519
        curve25519_key curve;
    #endif
    #ifdef HAVE_CURVE448
        curve448_key curve;
    #endif
    } keyGen;
#endif
} PkCbInfo;

#if defined(DEBUG_PK_CB) || defined(TEST_PK_PRIVKEY)
    #define WOLFSSL_PKMSG(_f_, ...) printf(_f_, ##__VA_ARGS__)
#else
    #define WOLFSSL_PKMSG(_f_, ...)
#endif

#ifdef HAVE_ECC

static WC_INLINE int myEccKeyGen(WOLFSSL* ssl, ecc_key* key, word32 keySz,
    int ecc_curve, void* ctx)
{
    int       ret;
    WC_RNG    rng;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;
    ecc_key*  new_key;
#ifdef TEST_PK_PRIVKEY
    byte qx[MAX_ECC_BYTES], qy[MAX_ECC_BYTES];
    word32 qxLen = sizeof(qx), qyLen = sizeof(qy);

    new_key = &cbInfo->keyGen.ecc;
#else
    new_key = key;
#endif

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK ECC KeyGen: keySz %d, Curve ID %d\n", keySz, ecc_curve);

    ret = wc_InitRng(&rng);
    if (ret != 0)
        return ret;

    ret = wc_ecc_init(new_key);
    if (ret == 0) {
        /* create new key */
        ret = wc_ecc_make_key_ex(&rng, keySz, new_key, ecc_curve);

    #ifdef TEST_PK_PRIVKEY
        if (ret == 0) {
            /* extract public portion from new key into `key` arg */
            ret = wc_ecc_export_public_raw(new_key, qx, &qxLen, qy, &qyLen);
            if (ret == 0) {
                /* load public portion only into key */
                ret = wc_ecc_import_unsigned(key, qx, qy, NULL, ecc_curve);
            }
            (void)qxLen;
            (void)qyLen;
        }
    #endif
    }

    WOLFSSL_PKMSG("PK ECC KeyGen: ret %d\n", ret);

    wc_FreeRng(&rng);

    return ret;
}

static WC_INLINE int myEccSign(WOLFSSL* ssl, const byte* in, word32 inSz,
        byte* out, word32* outSz, const byte* key, word32 keySz, void* ctx)
{
    int       ret;
    WC_RNG    rng;
    word32    idx = 0;
    ecc_key   myKey;
    byte*     keyBuf = (byte*)key;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK ECC Sign: inSz %d, keySz %d\n", inSz, keySz);

#ifdef TEST_PK_PRIVKEY
    ret = load_key_file(cbInfo->ourKey, &keyBuf, &keySz);
    if (ret != 0)
        return ret;
#endif

    ret = wc_InitRng(&rng);
    if (ret != 0)
        return ret;

    ret = wc_ecc_init(&myKey);
    if (ret == 0) {
        ret = wc_EccPrivateKeyDecode(keyBuf, &idx, &myKey, keySz);
        if (ret == 0) {
            WOLFSSL_PKMSG("PK ECC Sign: Curve ID %d\n", myKey.dp->id);
            ret = wc_ecc_sign_hash(in, inSz, out, outSz, &rng, &myKey);
        }
        wc_ecc_free(&myKey);
    }
    wc_FreeRng(&rng);

#ifdef TEST_PK_PRIVKEY
    free(keyBuf);
#endif

    WOLFSSL_PKMSG("PK ECC Sign: ret %d outSz %d\n", ret, *outSz);

    return ret;
}


static WC_INLINE int myEccVerify(WOLFSSL* ssl, const byte* sig, word32 sigSz,
        const byte* hash, word32 hashSz, const byte* key, word32 keySz,
        int* result, void* ctx)
{
    int       ret;
    word32    idx = 0;
    ecc_key   myKey;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK ECC Verify: sigSz %d, hashSz %d, keySz %d\n", sigSz, hashSz, keySz);

    ret = wc_ecc_init(&myKey);
    if (ret == 0) {
        ret = wc_EccPublicKeyDecode(key, &idx, &myKey, keySz);
        if (ret == 0)
            ret = wc_ecc_verify_hash(sig, sigSz, hash, hashSz, result, &myKey);
        wc_ecc_free(&myKey);
    }

    WOLFSSL_PKMSG("PK ECC Verify: ret %d, result %d\n", ret, *result);

    return ret;
}

static WC_INLINE int myEccSharedSecret(WOLFSSL* ssl, ecc_key* otherKey,
        unsigned char* pubKeyDer, unsigned int* pubKeySz,
        unsigned char* out, unsigned int* outlen,
        int side, void* ctx)
{
    int       ret;
    ecc_key*  privKey = NULL;
    ecc_key*  pubKey = NULL;
    ecc_key   tmpKey;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK ECC PMS: Side %s, Peer Curve %d\n",
        side == WOLFSSL_CLIENT_END ? "client" : "server", otherKey->dp->id);

    ret = wc_ecc_init(&tmpKey);
    if (ret != 0) {
        return ret;
    }

    /* for client: create and export public key */
    if (side == WOLFSSL_CLIENT_END) {
        WC_RNG rng;

        privKey = &tmpKey;
        pubKey = otherKey;

        ret = wc_InitRng(&rng);
        if (ret == 0) {
            ret = wc_ecc_make_key_ex(&rng, 0, privKey, otherKey->dp->id);
        #ifdef WOLFSSL_ASYNC_CRYPT
            if (ret == WC_PENDING_E) {
                ret = wc_AsyncWait(ret, &privKey->asyncDev, WC_ASYNC_FLAG_NONE);
            }
        #endif
            if (ret == 0)
                ret = wc_ecc_export_x963(privKey, pubKeyDer, pubKeySz);
            wc_FreeRng(&rng);
        }
    }

    /* for server: import public key */
    else if (side == WOLFSSL_SERVER_END) {
    #ifdef TEST_PK_PRIVKEY
        privKey = &cbInfo->keyGen.ecc;
    #else
        privKey = otherKey;
    #endif
        pubKey = &tmpKey;

        ret = wc_ecc_import_x963_ex(pubKeyDer, *pubKeySz, pubKey,
            otherKey->dp->id);
    }
    else {
        ret = BAD_FUNC_ARG;
    }

#if defined(ECC_TIMING_RESISTANT) && !defined(HAVE_FIPS) && \
                                                         !defined(HAVE_SELFTEST)
    if (ret == 0) {
        ret = wc_ecc_set_rng(privKey, wolfSSL_GetRNG(ssl));
    }
#endif

    /* generate shared secret and return it */
    if (ret == 0) {
        ret = wc_ecc_shared_secret(privKey, pubKey, out, outlen);

    #ifdef WOLFSSL_ASYNC_CRYPT
        if (ret == WC_PENDING_E) {
            ret = wc_AsyncWait(ret, &privKey->asyncDev, WC_ASYNC_FLAG_CALL_AGAIN);
        }
    #endif
    }

#ifdef TEST_PK_PRIVKEY
    if (side == WOLFSSL_SERVER_END) {
        wc_ecc_free(&cbInfo->keyGen.ecc);
    }
#endif

    wc_ecc_free(&tmpKey);

    WOLFSSL_PKMSG("PK ECC PMS: ret %d, PubKeySz %d, OutLen %d\n", ret, *pubKeySz, *outlen);

    return ret;
}

#ifdef HAVE_ED25519
static WC_INLINE int myEd25519Sign(WOLFSSL* ssl, const byte* in, word32 inSz,
        byte* out, word32* outSz, const byte* key, word32 keySz, void* ctx)
{
    int         ret;
    word32      idx = 0;
    ed25519_key myKey;
    byte*       keyBuf = (byte*)key;
    PkCbInfo*   cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK 25519 Sign: inSz %d, keySz %d\n", inSz, keySz);

#ifdef TEST_PK_PRIVKEY
    ret = load_key_file(cbInfo->ourKey, &keyBuf, &keySz);
    if (ret != 0)
        return ret;
#endif

    ret = wc_ed25519_init(&myKey);
    if (ret == 0) {
        ret = wc_Ed25519PrivateKeyDecode(keyBuf, &idx, &myKey, keySz);
        if (ret == 0)
            ret = wc_ed25519_sign_msg(in, inSz, out, outSz, &myKey);
        wc_ed25519_free(&myKey);
    }

#ifdef TEST_PK_PRIVKEY
    free(keyBuf);
#endif

    WOLFSSL_PKMSG("PK 25519 Sign: ret %d, outSz %d\n", ret, *outSz);

    return ret;
}


static WC_INLINE int myEd25519Verify(WOLFSSL* ssl, const byte* sig, word32 sigSz,
        const byte* msg, word32 msgSz, const byte* key, word32 keySz,
        int* result, void* ctx)
{
    int         ret;
    ed25519_key myKey;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK 25519 Verify: sigSz %d, msgSz %d, keySz %d\n", sigSz, msgSz, keySz);

    ret = wc_ed25519_init(&myKey);
    if (ret == 0) {
        ret = wc_ed25519_import_public(key, keySz, &myKey);
        if (ret == 0) {
            ret = wc_ed25519_verify_msg(sig, sigSz, msg, msgSz, result, &myKey);
        }
        wc_ed25519_free(&myKey);
    }

    WOLFSSL_PKMSG("PK 25519 Verify: ret %d, result %d\n", ret, *result);

    return ret;
}
#endif /* HAVE_ED25519 */

#ifdef HAVE_CURVE25519
static WC_INLINE int myX25519KeyGen(WOLFSSL* ssl, curve25519_key* key,
    unsigned int keySz, void* ctx)
{
    int       ret;
    WC_RNG    rng;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK 25519 KeyGen: keySz %d\n", keySz);

    ret = wc_InitRng(&rng);
    if (ret != 0)
        return ret;

    ret = wc_curve25519_make_key(&rng, keySz, key);

    wc_FreeRng(&rng);

    WOLFSSL_PKMSG("PK 25519 KeyGen: ret %d\n", ret);

    return ret;
}

static WC_INLINE int myX25519SharedSecret(WOLFSSL* ssl, curve25519_key* otherKey,
        unsigned char* pubKeyDer, unsigned int* pubKeySz,
        unsigned char* out, unsigned int* outlen,
        int side, void* ctx)
{
    int      ret;
    curve25519_key* privKey = NULL;
    curve25519_key* pubKey = NULL;
    curve25519_key  tmpKey;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK 25519 PMS: side %s\n",
        side == WOLFSSL_CLIENT_END ? "client" : "server");

    ret = wc_curve25519_init(&tmpKey);
    if (ret != 0) {
        return ret;
    }

    /* for client: create and export public key */
    if (side == WOLFSSL_CLIENT_END) {
        WC_RNG rng;

        privKey = &tmpKey;
        pubKey = otherKey;

        ret = wc_InitRng(&rng);
        if (ret == 0) {
            ret = wc_curve25519_make_key(&rng, CURVE25519_KEYSIZE, privKey);
            if (ret == 0) {
                ret = wc_curve25519_export_public_ex(privKey, pubKeyDer,
                    pubKeySz, EC25519_LITTLE_ENDIAN);
            }
            wc_FreeRng(&rng);
        }
    }

    /* for server: import public key */
    else if (side == WOLFSSL_SERVER_END) {
        privKey = otherKey;
        pubKey = &tmpKey;

        ret = wc_curve25519_import_public_ex(pubKeyDer, *pubKeySz, pubKey,
            EC25519_LITTLE_ENDIAN);
    }
    else {
        ret = BAD_FUNC_ARG;
    }

    /* generate shared secret and return it */
    if (ret == 0) {
        ret = wc_curve25519_shared_secret_ex(privKey, pubKey, out, outlen,
            EC25519_LITTLE_ENDIAN);
    }

    wc_curve25519_free(&tmpKey);

    WOLFSSL_PKMSG("PK 25519 PMS: ret %d, pubKeySz %d, outLen %d\n",
        ret, *pubKeySz, *outlen);

    return ret;
}
#endif /* HAVE_CURVE25519 */

#ifdef HAVE_ED448
static WC_INLINE int myEd448Sign(WOLFSSL* ssl, const byte* in, word32 inSz,
        byte* out, word32* outSz, const byte* key, word32 keySz, void* ctx)
{
    int         ret;
    word32      idx = 0;
    ed448_key   myKey;
    byte*       keyBuf = (byte*)key;
    PkCbInfo*   cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK 448 Sign: inSz %d, keySz %d\n", inSz, keySz);

#ifdef TEST_PK_PRIVKEY
    ret = load_key_file(cbInfo->ourKey, &keyBuf, &keySz);
    if (ret != 0)
        return ret;
#endif

    ret = wc_ed448_init(&myKey);
    if (ret == 0) {
        ret = wc_Ed448PrivateKeyDecode(keyBuf, &idx, &myKey, keySz);
        if (ret == 0)
            ret = wc_ed448_sign_msg(in, inSz, out, outSz, &myKey, NULL, 0);
        wc_ed448_free(&myKey);
    }

#ifdef TEST_PK_PRIVKEY
    free(keyBuf);
#endif

    WOLFSSL_PKMSG("PK 448 Sign: ret %d, outSz %d\n", ret, *outSz);

    return ret;
}


static WC_INLINE int myEd448Verify(WOLFSSL* ssl, const byte* sig, word32 sigSz,
        const byte* msg, word32 msgSz, const byte* key, word32 keySz,
        int* result, void* ctx)
{
    int         ret;
    ed448_key   myKey;
    PkCbInfo*   cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK 448 Verify: sigSz %d, msgSz %d, keySz %d\n", sigSz, msgSz,
                  keySz);

    ret = wc_ed448_init(&myKey);
    if (ret == 0) {
        ret = wc_ed448_import_public(key, keySz, &myKey);
        if (ret == 0) {
            ret = wc_ed448_verify_msg(sig, sigSz, msg, msgSz, result, &myKey,
                                                                       NULL, 0);
        }
        wc_ed448_free(&myKey);
    }

    WOLFSSL_PKMSG("PK 448 Verify: ret %d, result %d\n", ret, *result);

    return ret;
}
#endif /* HAVE_ED448 */

#ifdef HAVE_CURVE448
static WC_INLINE int myX448KeyGen(WOLFSSL* ssl, curve448_key* key,
    unsigned int keySz, void* ctx)
{
    int       ret;
    WC_RNG    rng;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK 448 KeyGen: keySz %d\n", keySz);

    ret = wc_InitRng(&rng);
    if (ret != 0)
        return ret;

    ret = wc_curve448_make_key(&rng, keySz, key);

    wc_FreeRng(&rng);

    WOLFSSL_PKMSG("PK 448 KeyGen: ret %d\n", ret);

    return ret;
}

static WC_INLINE int myX448SharedSecret(WOLFSSL* ssl, curve448_key* otherKey,
        unsigned char* pubKeyDer, unsigned int* pubKeySz,
        unsigned char* out, unsigned int* outlen,
        int side, void* ctx)
{
    int           ret;
    curve448_key* privKey = NULL;
    curve448_key* pubKey = NULL;
    curve448_key  tmpKey;
    PkCbInfo*     cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK 448 PMS: side %s\n",
        side == WOLFSSL_CLIENT_END ? "client" : "server");

    ret = wc_curve448_init(&tmpKey);
    if (ret != 0) {
        return ret;
    }

    /* for client: create and export public key */
    if (side == WOLFSSL_CLIENT_END) {
        WC_RNG rng;

        privKey = &tmpKey;
        pubKey = otherKey;

        ret = wc_InitRng(&rng);
        if (ret == 0) {
            ret = wc_curve448_make_key(&rng, CURVE448_KEY_SIZE, privKey);
            if (ret == 0) {
                ret = wc_curve448_export_public_ex(privKey, pubKeyDer,
                    pubKeySz, EC448_LITTLE_ENDIAN);
            }
            wc_FreeRng(&rng);
        }
    }

    /* for server: import public key */
    else if (side == WOLFSSL_SERVER_END) {
        privKey = otherKey;
        pubKey = &tmpKey;

        ret = wc_curve448_import_public_ex(pubKeyDer, *pubKeySz, pubKey,
            EC448_LITTLE_ENDIAN);
    }
    else {
        ret = BAD_FUNC_ARG;
    }

    /* generate shared secret and return it */
    if (ret == 0) {
        ret = wc_curve448_shared_secret_ex(privKey, pubKey, out, outlen,
            EC448_LITTLE_ENDIAN);
    }

    wc_curve448_free(&tmpKey);

    WOLFSSL_PKMSG("PK 448 PMS: ret %d, pubKeySz %d, outLen %d\n",
        ret, *pubKeySz, *outlen);

    return ret;
}
#endif /* HAVE_CURVE448 */

#endif /* HAVE_ECC */

#ifndef NO_DH
static WC_INLINE int myDhCallback(WOLFSSL* ssl, struct DhKey* key,
        const unsigned char* priv, unsigned int privSz,
        const unsigned char* pubKeyDer, unsigned int pubKeySz,
        unsigned char* out, unsigned int* outlen,
        void* ctx)
{
    int ret;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    /* return 0 on success */
    ret = wc_DhAgree(key, out, outlen, priv, privSz, pubKeyDer, pubKeySz);

    WOLFSSL_PKMSG("PK ED Agree: ret %d, privSz %d, pubKeySz %d, outlen %d\n",
        ret, privSz, pubKeySz, *outlen);

    return ret;
};

#endif /* !NO_DH */

#ifndef NO_RSA

static WC_INLINE int myRsaSign(WOLFSSL* ssl, const byte* in, word32 inSz,
        byte* out, word32* outSz, const byte* key, word32 keySz, void* ctx)
{
    WC_RNG  rng;
    int     ret;
    word32  idx = 0;
    RsaKey  myKey;
    byte*   keyBuf = (byte*)key;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK RSA Sign: inSz %d, keySz %d\n", inSz, keySz);

#ifdef TEST_PK_PRIVKEY
    ret = load_key_file(cbInfo->ourKey, &keyBuf, &keySz);
    if (ret != 0)
        return ret;
#endif

    ret = wc_InitRng(&rng);
    if (ret != 0)
        return ret;

    ret = wc_InitRsaKey(&myKey, NULL);
    if (ret == 0) {
        ret = wc_RsaPrivateKeyDecode(keyBuf, &idx, &myKey, keySz);
        if (ret == 0)
            ret = wc_RsaSSL_Sign(in, inSz, out, *outSz, &myKey, &rng);
        if (ret > 0) {  /* save and convert to 0 success */
            *outSz = ret;
            ret = 0;
        }
        wc_FreeRsaKey(&myKey);
    }
    wc_FreeRng(&rng);

#ifdef TEST_PK_PRIVKEY
    free(keyBuf);
#endif

    WOLFSSL_PKMSG("PK RSA Sign: ret %d, outSz %d\n", ret, *outSz);

    return ret;
}


static WC_INLINE int myRsaVerify(WOLFSSL* ssl, byte* sig, word32 sigSz,
        byte** out, const byte* key, word32 keySz, void* ctx)
{
    int     ret;
    word32  idx = 0;
    RsaKey  myKey;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK RSA Verify: sigSz %d, keySz %d\n", sigSz, keySz);

    ret = wc_InitRsaKey(&myKey, NULL);
    if (ret == 0) {
        ret = wc_RsaPublicKeyDecode(key, &idx, &myKey, keySz);
        if (ret == 0)
            ret = wc_RsaSSL_VerifyInline(sig, sigSz, out, &myKey);
        wc_FreeRsaKey(&myKey);
    }

    WOLFSSL_PKMSG("PK RSA Verify: ret %d\n", ret);

    return ret;
}

static WC_INLINE int myRsaSignCheck(WOLFSSL* ssl, byte* sig, word32 sigSz,
        byte** out, const byte* key, word32 keySz, void* ctx)
{
    int     ret;
    word32  idx = 0;
    RsaKey  myKey;
    byte*   keyBuf = (byte*)key;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK RSA SignCheck: sigSz %d, keySz %d\n", sigSz, keySz);

#ifdef TEST_PK_PRIVKEY
    ret = load_key_file(cbInfo->ourKey, &keyBuf, &keySz);
    if (ret != 0)
        return ret;
#endif

    ret = wc_InitRsaKey(&myKey, NULL);
    if (ret == 0) {
        ret = wc_RsaPrivateKeyDecode(keyBuf, &idx, &myKey, keySz);
        if (ret == 0)
            ret = wc_RsaSSL_VerifyInline(sig, sigSz, out, &myKey);
        wc_FreeRsaKey(&myKey);
    }
#ifdef TEST_PK_PRIVKEY
    free(keyBuf);
#endif

    WOLFSSL_PKMSG("PK RSA SignCheck: ret %d\n", ret);

    return ret;
}

#ifdef WC_RSA_PSS
static WC_INLINE int myRsaPssSign(WOLFSSL* ssl, const byte* in, word32 inSz,
        byte* out, word32* outSz, int hash, int mgf, const byte* key,
        word32 keySz, void* ctx)
{
    enum wc_HashType hashType = WC_HASH_TYPE_NONE;
    WC_RNG           rng;
    int              ret;
    word32           idx = 0;
    RsaKey           myKey;
    byte*            keyBuf = (byte*)key;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK RSA PSS Sign: inSz %d, hash %d, mgf %d, keySz %d\n",
        inSz, hash, mgf, keySz);

#ifdef TEST_PK_PRIVKEY
    ret = load_key_file(cbInfo->ourKey, &keyBuf, &keySz);
    if (ret != 0)
        return ret;
#endif

    switch (hash) {
#ifndef NO_SHA256
        case SHA256h:
            hashType = WC_HASH_TYPE_SHA256;
            break;
#endif
#ifdef WOLFSSL_SHA384
        case SHA384h:
            hashType = WC_HASH_TYPE_SHA384;
            break;
#endif
#ifdef WOLFSSL_SHA512
        case SHA512h:
            hashType = WC_HASH_TYPE_SHA512;
            break;
#endif
    }

    ret = wc_InitRng(&rng);
    if (ret != 0)
        return ret;

    ret = wc_InitRsaKey(&myKey, NULL);
    if (ret == 0) {
        ret = wc_RsaPrivateKeyDecode(keyBuf, &idx, &myKey, keySz);
        if (ret == 0) {
            ret = wc_RsaPSS_Sign(in, inSz, out, *outSz, hashType, mgf, &myKey,
                                 &rng);
        }
        if (ret > 0) {  /* save and convert to 0 success */
            *outSz = ret;
            ret = 0;
        }
        wc_FreeRsaKey(&myKey);
    }
    wc_FreeRng(&rng);

#ifdef TEST_PK_PRIVKEY
    free(keyBuf);
#endif

    WOLFSSL_PKMSG("PK RSA PSS Sign: ret %d, outSz %d\n", ret, *outSz);

    return ret;
}


static WC_INLINE int myRsaPssVerify(WOLFSSL* ssl, byte* sig, word32 sigSz,
        byte** out, int hash, int mgf, const byte* key, word32 keySz, void* ctx)
{
    int       ret;
    word32    idx = 0;
    RsaKey    myKey;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;
    enum wc_HashType hashType = WC_HASH_TYPE_NONE;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK RSA PSS Verify: sigSz %d, hash %d, mgf %d, keySz %d\n",
        sigSz, hash, mgf, keySz);

    switch (hash) {
#ifndef NO_SHA256
        case SHA256h:
            hashType = WC_HASH_TYPE_SHA256;
            break;
#endif
#ifdef WOLFSSL_SHA384
        case SHA384h:
            hashType = WC_HASH_TYPE_SHA384;
            break;
#endif
#ifdef WOLFSSL_SHA512
        case SHA512h:
            hashType = WC_HASH_TYPE_SHA512;
            break;
#endif
    }

    ret = wc_InitRsaKey(&myKey, NULL);
    if (ret == 0) {
        ret = wc_RsaPublicKeyDecode(key, &idx, &myKey, keySz);
        if (ret == 0) {
            ret = wc_RsaPSS_VerifyInline(sig, sigSz, out, hashType, mgf,
                                         &myKey);
            }
        wc_FreeRsaKey(&myKey);
    }

    WOLFSSL_PKMSG("PK RSA PSS Verify: ret %d\n", ret);

    return ret;
}

static WC_INLINE int myRsaPssSignCheck(WOLFSSL* ssl, byte* sig, word32 sigSz,
        byte** out, int hash, int mgf, const byte* key, word32 keySz, void* ctx)
{
    int       ret;
    word32    idx = 0;
    RsaKey    myKey;
    byte*     keyBuf = (byte*)key;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;
    enum wc_HashType hashType = WC_HASH_TYPE_NONE;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK RSA PSS SignCheck: sigSz %d, hash %d, mgf %d, keySz %d\n",
        sigSz, hash, mgf, keySz);

#ifdef TEST_PK_PRIVKEY
    ret = load_key_file(cbInfo->ourKey, &keyBuf, &keySz);
    if (ret != 0)
        return ret;
#endif

    switch (hash) {
#ifndef NO_SHA256
        case SHA256h:
            hashType = WC_HASH_TYPE_SHA256;
            break;
#endif
#ifdef WOLFSSL_SHA384
        case SHA384h:
            hashType = WC_HASH_TYPE_SHA384;
            break;
#endif
#ifdef WOLFSSL_SHA512
        case SHA512h:
            hashType = WC_HASH_TYPE_SHA512;
            break;
#endif
    }

    ret = wc_InitRsaKey(&myKey, NULL);
    if (ret == 0) {
        ret = wc_RsaPrivateKeyDecode(keyBuf, &idx, &myKey, keySz);
        if (ret == 0) {
            ret = wc_RsaPSS_VerifyInline(sig, sigSz, out, hashType, mgf,
                                         &myKey);
            }
        wc_FreeRsaKey(&myKey);
    }

#ifdef TEST_PK_PRIVKEY
    free(keyBuf);
#endif

    WOLFSSL_PKMSG("PK RSA PSS SignCheck: ret %d\n", ret);

    return ret;
}
#endif


static WC_INLINE int myRsaEnc(WOLFSSL* ssl, const byte* in, word32 inSz,
                           byte* out, word32* outSz, const byte* key,
                           word32 keySz, void* ctx)
{
    int       ret;
    word32    idx = 0;
    RsaKey    myKey;
    WC_RNG    rng;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK RSA Enc: inSz %d, keySz %d\n", inSz, keySz);

    ret = wc_InitRng(&rng);
    if (ret != 0)
        return ret;

    ret = wc_InitRsaKey(&myKey, NULL);
    if (ret == 0) {
        ret = wc_RsaPublicKeyDecode(key, &idx, &myKey, keySz);
        if (ret == 0) {
            ret = wc_RsaPublicEncrypt(in, inSz, out, *outSz, &myKey, &rng);
            if (ret > 0) {
                *outSz = ret;
                ret = 0;  /* reset to success */
            }
        }
        wc_FreeRsaKey(&myKey);
    }
    wc_FreeRng(&rng);

    WOLFSSL_PKMSG("PK RSA Enc: ret %d, outSz %d\n", ret, *outSz);

    return ret;
}

static WC_INLINE int myRsaDec(WOLFSSL* ssl, byte* in, word32 inSz,
                           byte** out,
                           const byte* key, word32 keySz, void* ctx)
{
    int       ret;
    word32    idx = 0;
    RsaKey    myKey;
    byte*     keyBuf = (byte*)key;
    PkCbInfo* cbInfo = (PkCbInfo*)ctx;

    (void)ssl;
    (void)cbInfo;

    WOLFSSL_PKMSG("PK RSA Dec: inSz %d, keySz %d\n", inSz, keySz);

#ifdef TEST_PK_PRIVKEY
    ret = load_key_file(cbInfo->ourKey, &keyBuf, &keySz);
    if (ret != 0)
        return ret;
#endif

    ret = wc_InitRsaKey(&myKey, NULL);
    if (ret == 0) {
        ret = wc_RsaPrivateKeyDecode(keyBuf, &idx, &myKey, keySz);
        if (ret == 0) {
            #ifdef WC_RSA_BLINDING
                ret = wc_RsaSetRNG(&myKey, wolfSSL_GetRNG(ssl));
                if (ret != 0) {
                    wc_FreeRsaKey(&myKey);
                    return ret;
                }
            #endif
            ret = wc_RsaPrivateDecryptInline(in, inSz, out, &myKey);
        }
        wc_FreeRsaKey(&myKey);
    }

#ifdef TEST_PK_PRIVKEY
    free(keyBuf);
#endif

    WOLFSSL_PKMSG("PK RSA Dec: ret %d\n", ret);

    return ret;
}

#endif /* NO_RSA */

static WC_INLINE void SetupPkCallbacks(WOLFSSL_CTX* ctx)
{
    (void)ctx;

    #ifdef HAVE_ECC
        wolfSSL_CTX_SetEccKeyGenCb(ctx, myEccKeyGen);
        wolfSSL_CTX_SetEccSignCb(ctx, myEccSign);
        wolfSSL_CTX_SetEccVerifyCb(ctx, myEccVerify);
        wolfSSL_CTX_SetEccSharedSecretCb(ctx, myEccSharedSecret);
    #endif /* HAVE_ECC */
    #ifndef NO_DH
        wolfSSL_CTX_SetDhAgreeCb(ctx, myDhCallback);
    #endif
    #ifdef HAVE_ED25519
        wolfSSL_CTX_SetEd25519SignCb(ctx, myEd25519Sign);
        wolfSSL_CTX_SetEd25519VerifyCb(ctx, myEd25519Verify);
    #endif
    #ifdef HAVE_CURVE25519
        wolfSSL_CTX_SetX25519KeyGenCb(ctx, myX25519KeyGen);
        wolfSSL_CTX_SetX25519SharedSecretCb(ctx, myX25519SharedSecret);
    #endif
    #ifdef HAVE_ED448
        wolfSSL_CTX_SetEd448SignCb(ctx, myEd448Sign);
        wolfSSL_CTX_SetEd448VerifyCb(ctx, myEd448Verify);
    #endif
    #ifdef HAVE_CURVE448
        wolfSSL_CTX_SetX448KeyGenCb(ctx, myX448KeyGen);
        wolfSSL_CTX_SetX448SharedSecretCb(ctx, myX448SharedSecret);
    #endif
    #ifndef NO_RSA
        wolfSSL_CTX_SetRsaSignCb(ctx, myRsaSign);
        wolfSSL_CTX_SetRsaVerifyCb(ctx, myRsaVerify);
        wolfSSL_CTX_SetRsaSignCheckCb(ctx, myRsaSignCheck);
        #ifdef WC_RSA_PSS
            wolfSSL_CTX_SetRsaPssSignCb(ctx, myRsaPssSign);
            wolfSSL_CTX_SetRsaPssVerifyCb(ctx, myRsaPssVerify);
            wolfSSL_CTX_SetRsaPssSignCheckCb(ctx, myRsaPssSignCheck);
        #endif
        wolfSSL_CTX_SetRsaEncCb(ctx, myRsaEnc);
        wolfSSL_CTX_SetRsaDecCb(ctx, myRsaDec);
    #endif /* NO_RSA */
}

static WC_INLINE void SetupPkCallbackContexts(WOLFSSL* ssl, void* myCtx)
{
    #ifdef HAVE_ECC
        wolfSSL_SetEccKeyGenCtx(ssl, myCtx);
        wolfSSL_SetEccSignCtx(ssl, myCtx);
        wolfSSL_SetEccVerifyCtx(ssl, myCtx);
        wolfSSL_SetEccSharedSecretCtx(ssl, myCtx);
    #endif /* HAVE_ECC */
    #ifndef NO_DH
        wolfSSL_SetDhAgreeCtx(ssl, myCtx);
    #endif
    #ifdef HAVE_ED25519
        wolfSSL_SetEd25519SignCtx(ssl, myCtx);
        wolfSSL_SetEd25519VerifyCtx(ssl, myCtx);
    #endif
    #ifdef HAVE_CURVE25519
        wolfSSL_SetX25519KeyGenCtx(ssl, myCtx);
        wolfSSL_SetX25519SharedSecretCtx(ssl, myCtx);
    #endif
    #ifdef HAVE_ED448
        wolfSSL_SetEd448SignCtx(ssl, myCtx);
        wolfSSL_SetEd448VerifyCtx(ssl, myCtx);
    #endif
    #ifdef HAVE_CURVE448
        wolfSSL_SetX448KeyGenCtx(ssl, myCtx);
        wolfSSL_SetX448SharedSecretCtx(ssl, myCtx);
    #endif
    #ifndef NO_RSA
        wolfSSL_SetRsaSignCtx(ssl, myCtx);
        wolfSSL_SetRsaVerifyCtx(ssl, myCtx);
        #ifdef WC_RSA_PSS
            wolfSSL_SetRsaPssSignCtx(ssl, myCtx);
            wolfSSL_SetRsaPssVerifyCtx(ssl, myCtx);
        #endif
        wolfSSL_SetRsaEncCtx(ssl, myCtx);
        wolfSSL_SetRsaDecCtx(ssl, myCtx);
    #endif /* NO_RSA */
}

#endif /* HAVE_PK_CALLBACKS */

static WC_INLINE int SimulateWantWriteIOSendCb(WOLFSSL *ssl, char *buf, int sz, void *ctx)
{
    static int wantWriteFlag = 1;

    int sent;
    int sd = *(int*)ctx;

    (void)ssl;

    if (!wantWriteFlag)
    {
        wantWriteFlag = 1;

        sent = wolfIO_Send(sd, buf, sz, 0);
        if (sent < 0) {
            int err = errno;

            if (err == SOCKET_EWOULDBLOCK || err == SOCKET_EAGAIN) {
                return WOLFSSL_CBIO_ERR_WANT_WRITE;
            }
            else if (err == SOCKET_ECONNRESET) {
                return WOLFSSL_CBIO_ERR_CONN_RST;
            }
            else if (err == SOCKET_EINTR) {
                return WOLFSSL_CBIO_ERR_ISR;
            }
            else if (err == SOCKET_EPIPE) {
                return WOLFSSL_CBIO_ERR_CONN_CLOSE;
            }
            else {
                return WOLFSSL_CBIO_ERR_GENERAL;
            }
        }

        return sent;
    }
    else
    {
        wantWriteFlag = 0;
        return WOLFSSL_CBIO_ERR_WANT_WRITE;
    }
}

#if defined(__hpux__) || defined(__MINGW32__) || defined (WOLFSSL_TIRTOS) \
                      || defined(_MSC_VER)

/* HP/UX doesn't have strsep, needed by test/suites.c */
static WC_INLINE char* strsep(char **stringp, const char *delim)
{
    char* start;
    char* end;

    start = *stringp;
    if (start == NULL)
        return NULL;

    if ((end = strpbrk(start, delim))) {
        *end++ = '\0';
        *stringp = end;
    } else {
        *stringp = NULL;
    }

    return start;
}

#endif /* __hpux__ and others */

/* Create unique filename, len is length of tempfn name, assuming
   len does not include null terminating character,
   num is number of characters in tempfn name to randomize */
static WC_INLINE const char* mymktemp(char *tempfn, int len, int num)
{
    int x, size;
    static const char alphanum[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
                                   "abcdefghijklmnopqrstuvwxyz";
    WC_RNG rng;
    byte   out;

    if (tempfn == NULL || len < 1 || num < 1 || len <= num) {
        printf("Bad input\n");
        return NULL;
    }

    size = len - 1;

    if (wc_InitRng(&rng) != 0) {
        printf("InitRng failed\n");
        return NULL;
    }

    for (x = size; x > size - num; x--) {
        if (wc_RNG_GenerateBlock(&rng,(byte*)&out, sizeof(out)) != 0) {
            printf("RNG_GenerateBlock failed\n");
            return NULL;
        }
        tempfn[x] = alphanum[out % (sizeof(alphanum) - 1)];
    }
    tempfn[len] = '\0';

    wc_FreeRng(&rng);
    (void)rng; /* for WC_NO_RNG case */

    return tempfn;
}



#if defined(HAVE_SESSION_TICKET) && defined(HAVE_CHACHA) && \
                                    defined(HAVE_POLY1305)

    #include <wolfssl/wolfcrypt/chacha20_poly1305.h>

    typedef struct key_ctx {
        byte name[WOLFSSL_TICKET_NAME_SZ];        /* name for this context */
        byte key[CHACHA20_POLY1305_AEAD_KEYSIZE]; /* cipher key */
    } key_ctx;

    static THREAD_LS_T key_ctx myKey_ctx;
    static THREAD_LS_T WC_RNG myKey_rng;

    static WC_INLINE int TicketInit(void)
    {
        int ret = wc_InitRng(&myKey_rng);
        if (ret != 0) return ret;

        ret = wc_RNG_GenerateBlock(&myKey_rng, myKey_ctx.key, sizeof(myKey_ctx.key));
        if (ret != 0) return ret;

        ret = wc_RNG_GenerateBlock(&myKey_rng, myKey_ctx.name,sizeof(myKey_ctx.name));
        if (ret != 0) return ret;

        return 0;
    }

    static WC_INLINE void TicketCleanup(void)
    {
        wc_FreeRng(&myKey_rng);
    }

    static WC_INLINE int myTicketEncCb(WOLFSSL* ssl,
                             byte key_name[WOLFSSL_TICKET_NAME_SZ],
                             byte iv[WOLFSSL_TICKET_IV_SZ],
                             byte mac[WOLFSSL_TICKET_MAC_SZ],
                             int enc, byte* ticket, int inLen, int* outLen,
                             void* userCtx)
    {
        int ret;
        word16 sLen = XHTONS(inLen);
        byte aad[WOLFSSL_TICKET_NAME_SZ + WOLFSSL_TICKET_IV_SZ + 2];
        int  aadSz = WOLFSSL_TICKET_NAME_SZ + WOLFSSL_TICKET_IV_SZ + 2;
        byte* tmp = aad;

        (void)ssl;
        (void)userCtx;

        /* encrypt */
        if (enc) {
            XMEMCPY(key_name, myKey_ctx.name, WOLFSSL_TICKET_NAME_SZ);

            ret = wc_RNG_GenerateBlock(&myKey_rng, iv, WOLFSSL_TICKET_IV_SZ);
            if (ret != 0) return WOLFSSL_TICKET_RET_REJECT;

            /* build aad from key name, iv, and length */
            XMEMCPY(tmp, key_name, WOLFSSL_TICKET_NAME_SZ);
            tmp += WOLFSSL_TICKET_NAME_SZ;
            XMEMCPY(tmp, iv, WOLFSSL_TICKET_IV_SZ);
            tmp += WOLFSSL_TICKET_IV_SZ;
            XMEMCPY(tmp, &sLen, 2);

            ret = wc_ChaCha20Poly1305_Encrypt(myKey_ctx.key, iv,
                                              aad, aadSz,
                                              ticket, inLen,
                                              ticket,
                                              mac);
            if (ret != 0) return WOLFSSL_TICKET_RET_REJECT;
            *outLen = inLen;  /* no padding in this mode */
        }
        /* decrypt */
        else {

            /* see if we know this key */
            if (XMEMCMP(key_name, myKey_ctx.name, WOLFSSL_TICKET_NAME_SZ) != 0){
                printf("client presented unknown ticket key name ");
                return WOLFSSL_TICKET_RET_FATAL;
            }

            /* build aad from key name, iv, and length */
            XMEMCPY(tmp, key_name, WOLFSSL_TICKET_NAME_SZ);
            tmp += WOLFSSL_TICKET_NAME_SZ;
            XMEMCPY(tmp, iv, WOLFSSL_TICKET_IV_SZ);
            tmp += WOLFSSL_TICKET_IV_SZ;
            XMEMCPY(tmp, &sLen, 2);

            ret = wc_ChaCha20Poly1305_Decrypt(myKey_ctx.key, iv,
                                              aad, aadSz,
                                              ticket, inLen,
                                              mac,
                                              ticket);
            if (ret != 0) return WOLFSSL_TICKET_RET_REJECT;
            *outLen = inLen;  /* no padding in this mode */
        }

        return WOLFSSL_TICKET_RET_OK;
    }

#endif  /* HAVE_SESSION_TICKET && HAVE_CHACHA && HAVE_POLY1305 */

static WC_INLINE word16 GetRandomPort(void)
{
    word16 port = 0;

    /* Generate random port for testing */
    WC_RNG rng;
    if (wc_InitRng(&rng) == 0) {
        if (wc_RNG_GenerateBlock(&rng, (byte*)&port, sizeof(port)) == 0) {
            port |= 0xC000; /* Make sure its in the 49152 - 65535 range */
        }
        wc_FreeRng(&rng);
    }
    (void)rng; /* for WC_NO_RNG case */
    return port;
}

#endif /* wolfSSL_TEST_H */
