Hi, I am in the process of evaluating WolfSSL for use in our products.  We are basically a client application that connects to many different servers(that we do not control).  I have hit a problem verifying a certificate(-188 error from wolf (No CA signer to verify with)).  This is verifiable through windows schannel and through an online cert checker.  I list the url and snipped from my code. Hopefully someone can tell me what is happening. 

The url is netconnectvar1.paymentech.net on port 443

in user_settings.h of the library added
#define DEBUG_WOLFSSL

#define NO_FILESYSTEM
#pragma message("No FIleSystem!")

///// my application ...
int MySend( WOLFSSL *ssl, char *buf, int sz, void *ctx)
{
    CMyClient* p = (CMyClient*) ctx;
    return p->Send(buf,sz);
}

int MyRecv( WOLFSSL *ssl, char *buf, int sz, void *ctx)
{
    CMyClient* p = (CMyClient*) ctx;
    return p->Receive(buf,sz);
}

void MyLogging(const int logLevel, const char *const logMessage)
{
    CString s = logMessage;
    TRACE("L->%d Msg->%s\n",logLevel,s.Left(256));
}
BYTE ROOT_CERTS_PEM[] =
//syamntec G4
//513fb9743870b73440418d30930699ff
"-----BEGIN CERTIFICATE-----\n"
"MIIFODCCBCCgAwIBAgIQUT+5dDhwtzRAQY0wkwaZ/zANBgkqhkiG9w0BAQsFADCB\n"
"yjELMAkGA1UEBhMCVVMxFzAVBgNVBAoTDlZlcmlTaWduLCBJbmMuMR8wHQYDVQQL\n"
"ExZWZXJpU2lnbiBUcnVzdCBOZXR3b3JrMTowOAYDVQQLEzEoYykgMjAwNiBWZXJp\n"
"U2lnbiwgSW5jLiAtIEZvciBhdXRob3JpemVkIHVzZSBvbmx5MUUwQwYDVQQDEzxW\n"
"ZXJpU2lnbiBDbGFzcyAzIFB1YmxpYyBQcmltYXJ5IENlcnRpZmljYXRpb24gQXV0\n"
"aG9yaXR5IC0gRzUwHhcNMTMxMDMxMDAwMDAwWhcNMjMxMDMwMjM1OTU5WjB+MQsw\n"
"CQYDVQQGEwJVUzEdMBsGA1UEChMUU3ltYW50ZWMgQ29ycG9yYXRpb24xHzAdBgNV\n"
"BAsTFlN5bWFudGVjIFRydXN0IE5ldHdvcmsxLzAtBgNVBAMTJlN5bWFudGVjIENs\n"
"YXNzIDMgU2VjdXJlIFNlcnZlciBDQSAtIEc0MIIBIjANBgkqhkiG9w0BAQEFAAOC\n"
"AQ8AMIIBCgKCAQEAstgFyhx0LbUXVjnFSlIJluhL2AzxaJ+aQihiw6UwU35VEYJb\n"
"A3oNL+F5BMm0lncZgQGUWfm893qZJ4Itt4PdWid/sgN6nFMl6UgfRk/InSn4vnlW\n"
"9vf92Tpo2otLgjNBEsPIPMzWlnqEIRoiBAMnF4scaGGTDw5RgDMdtLXO637QYqzu\n"
"s3sBdO9pNevK1T2p7peYyo2qRA4lmUoVlqTObQJUHypqJuIGOmNIrLRM0XWTUP8T\n"
"L9ba4cYY9Z/JJV3zADreJk20KQnNDz0jbxZKgRb78oMQw7jW2FUyPfG9D72MUpVK\n"
"Fpd6UiFjdS8W+cRmvvW1Cdj/JwDNRHxvSz+w9wIDAQABo4IBYzCCAV8wEgYDVR0T\n"
"AQH/BAgwBgEB/wIBADAwBgNVHR8EKTAnMCWgI6Ahhh9odHRwOi8vczEuc3ltY2Iu\n"
"Y29tL3BjYTMtZzUuY3JsMA4GA1UdDwEB/wQEAwIBBjAvBggrBgEFBQcBAQQjMCEw\n"
"HwYIKwYBBQUHMAGGE2h0dHA6Ly9zMi5zeW1jYi5jb20wawYDVR0gBGQwYjBgBgpg\n"
"hkgBhvhFAQc2MFIwJgYIKwYBBQUHAgEWGmh0dHA6Ly93d3cuc3ltYXV0aC5jb20v\n"
"Y3BzMCgGCCsGAQUFBwICMBwaGmh0dHA6Ly93d3cuc3ltYXV0aC5jb20vcnBhMCkG\n"
"A1UdEQQiMCCkHjAcMRowGAYDVQQDExFTeW1hbnRlY1BLSS0xLTUzNDAdBgNVHQ4E\n"
"FgQUX2DPYZBV34RDFIpgKrL1evRDGO8wHwYDVR0jBBgwFoAUf9Nlp8Ld7LvwMAnz\n"
"Qzn6Aq8zMTMwDQYJKoZIhvcNAQELBQADggEBAF6UVkndji1l9cE2UbYD49qecxny\n"
"H1mrWH5sJgUs+oHXXCMXIiw3k/eG7IXmsKP9H+IyqEVv4dn7ua/ScKAyQmW/hP4W\n"
"Ko8/xabWo5N9Q+l0IZE1KPRj6S7t9/Vcf0uatSDpCr3gRRAMFJSaXaXjS5HoJJtG\n"
"QGX0InLNmfiIEfXzf+YzguaoxX7+0AjiJVgIcWjmzaLmFN5OUiQt/eV5E1PnXi8t\n"
"TRttQBVSK/eHiXgSgW7ZTaoteNTCLD0IX4eRnh8OsN4wUmSGiaqdZpwOdgyA8nTY\n"
"Kvi4Os7X1g8RvmurFPW9QaAiY4nxug9vKWNmLT+sjHLF+8fk1A/yO0+MKcc=\n"
"-----END CERTIFICATE-----\n"
//250ce8e030612e9f2b89f7054d7cf8fd
"-----BEGIN CERTIFICATE-----\n"
"MIIE0DCCBDmgAwIBAgIQJQzo4DBhLp8rifcFTXz4/TANBgkqhkiG9w0BAQUFADBf\n"
"MQswCQYDVQQGEwJVUzEXMBUGA1UEChMOVmVyaVNpZ24sIEluYy4xNzA1BgNVBAsT\n"
"LkNsYXNzIDMgUHVibGljIFByaW1hcnkgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkw\n"
"HhcNMDYxMTA4MDAwMDAwWhcNMjExMTA3MjM1OTU5WjCByjELMAkGA1UEBhMCVVMx\n"
"FzAVBgNVBAoTDlZlcmlTaWduLCBJbmMuMR8wHQYDVQQLExZWZXJpU2lnbiBUcnVz\n"
"dCBOZXR3b3JrMTowOAYDVQQLEzEoYykgMjAwNiBWZXJpU2lnbiwgSW5jLiAtIEZv\n"
"ciBhdXRob3JpemVkIHVzZSBvbmx5MUUwQwYDVQQDEzxWZXJpU2lnbiBDbGFzcyAz\n"
"IFB1YmxpYyBQcmltYXJ5IENlcnRpZmljYXRpb24gQXV0aG9yaXR5IC0gRzUwggEi\n"
"MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCvJAgIKXo1nmAMqudLO07cfLw8\n"
"RRy7K+D+KQL5VwijZIUVJ/XxrcgxiV0i6CqqpkKzj/i5Vbext0uz/o9+B1fs70Pb\n"
"ZmIVYc9gDaTY3vjgw2IIPVQT60nKWVSFJuUrjxuf6/WhkcIzSdhDY2pSS9KP6HBR\n"
"TdGJaXvHcPaz3BJ023tdS1bTlr8Vd6Gw9KIl8q8ckmcY5fQGBO+QueQA5N06tRn/\n"
"Arr0PO7gi+s3i+z016zy9vA9r911kTMZHRxAy3QkGSGT2RT+rCpSx4/VBEnkjWNH\n"
"iDxpg8v+R70rfk/Fla4OndTRQ8Bnc+MUCH7lP59zuDMKz10/NIeWiu5T6CUVAgMB\n"
"AAGjggGbMIIBlzAPBgNVHRMBAf8EBTADAQH/MDEGA1UdHwQqMCgwJqAkoCKGIGh0\n"
"dHA6Ly9jcmwudmVyaXNpZ24uY29tL3BjYTMuY3JsMA4GA1UdDwEB/wQEAwIBBjA9\n"
"BgNVHSAENjA0MDIGBFUdIAAwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly93d3cudmVy\n"
"aXNpZ24uY29tL2NwczAdBgNVHQ4EFgQUf9Nlp8Ld7LvwMAnzQzn6Aq8zMTMwbQYI\n"
"KwYBBQUHAQwEYTBfoV2gWzBZMFcwVRYJaW1hZ2UvZ2lmMCEwHzAHBgUrDgMCGgQU\n"
"j+XTGoasjY5rw8+AatRIGCx7GS4wJRYjaHR0cDovL2xvZ28udmVyaXNpZ24uY29t\n"
"L3ZzbG9nby5naWYwNAYIKwYBBQUHAQEEKDAmMCQGCCsGAQUFBzABhhhodHRwOi8v\n"
"b2NzcC52ZXJpc2lnbi5jb20wPgYDVR0lBDcwNQYIKwYBBQUHAwEGCCsGAQUFBwMC\n"
"BggrBgEFBQcDAwYJYIZIAYb4QgQBBgpghkgBhvhFAQgBMA0GCSqGSIb3DQEBBQUA\n"
"A4GBABMC3fjohgDyWvj4IAxZiGIHzs73Tvm7WaGY5eE43U68ZhjTresY8g3JbT5K\n"
"lCDDPLq9ZVTGr0SzEK0saz6r1we2uIFjxfleLuUqZ87NMwwq14lWAyMfs77oOghZ\n"
"tOxFNfeKW/9mz1Cvxm1XjRl4t7mi0VfqH5pLr7rJjhJ+xr3/\n"
"-----END CERTIFICATE-----\n"
};

bool SendAuthWolf(const CString packet, const bool bIsDebit,const CString debitConfpacket)
{
    gPort = (443);
    gHost = ("netconnectvar1.paymentech.net");

    //int sockfd;
    WOLFSSL_CTX* ctx;
    WOLFSSL* ssl;
    wolfSSL_method_func method = NULL;
    wolfSSL_Init();
   
    wolfSSL_SetLoggingCb(MyLogging);
    wolfSSL_Debugging_ON();   

    CMyClient cl;
    if(!cl.ConnectToServer(gHost,gPort,10000) )
    {
        err_sys("Connect Failed");
    }

    method = wolfTLSv1_2_client_method_ex; /* use TLS v1.2 */

    /* make new ssl context */
    if ( (ctx = wolfSSL_CTX_new(method(NULL))) == NULL)
    {
          err_sys("wolfSSL_CTX_new error");
    }
   
   
    wolfSSL_SetIOSend(ctx,MySend);
    wolfSSL_SetIORecv(ctx,MyRecv);

    ssl = wolfSSL_new(ctx);
    if (ssl == NULL)
    {
        wolfSSL_CTX_free(ctx);
        err_sys("unable to get SSL object");
    }

    /* Add cert to ctx */
    int x =     wolfSSL_CTX_load_verify_buffer(ctx, ROOT_CERTS_PEM,sizeof ROOT_CERTS_PEM, WOLFSSL_FILETYPE_PEM);

if (x != WOLFSSL_SUCCESS)
{
    x = wolfSSL_get_error(ssl, 0);
    CString errStr;
    errStr.Format("%d",x);
    AfxMessageBox( errStr);
}

    /* Connect wolfssl to the socket, server, then send message */

    wolfSSL_SetIOWriteCtx(ssl,&cl);
    wolfSSL_SetIOReadCtx(ssl,&cl);

    int ret,err;

    ret = wolfSSL_connect(ssl);
    if (ret != WOLFSSL_SUCCESS)
    {
        err = wolfSSL_get_error(ssl, 0);
        CString errStr,temp = wc_GetErrorString(err);
        errStr.Format(_T("%s[%d]"),temp,err);
        AfxMessageBox( errStr);
    }
    char buffer[5000];
   
    #define CRLF "\r\n"   
    m_lastError = "Value Not Set";   

    CString payLoad = "TEST PAYLOAD GOES HERE";
    CString Packet =    "POST /interfaces/bp10emu HTTP/1.0"            CRLF;
    Packet +=            "Host: " + gHost; Packet +=                             CRLF;
    Packet +=            "Content-Type: application/x-www-form-urlencoded"    CRLF;
    CString content;
    content.Format("Content-Length: %d"CRLF,payLoad.GetLength());
    Packet +=            content;
    Packet +=            CRLF;
    Packet +=            payLoad;
    wolfSSL_write(ssl, Packet, Packet.GetLength());
    memset(buffer,'\0',sizeof buffer);
    int bytes = wolfSSL_read(ssl, buffer, sizeof buffer);
    if(bytes > 0)
    {
        printf("%s",buffer);
        m_strAuthResponse = buffer;
    }
    /* frees all data before client termination */
    wolfSSL_free(ssl);
    wolfSSL_CTX_free(ctx);
    wolfSSL_Cleanup();
    cl.CloseConnection();
    return 555 != 0;
}
Thanks in Advance,
Bob