Can't load client's private key ?

[Dennis Xu]

Hi,   I have a problem when I try load a private key from a PEM-format key file: The private key and certificate are both exported and converted from Verisign's free Personal ID (which is installed into IE 5). My load_key function is : ....... static EVP_PKEY *load_key(char *key_file, int format) {  BIO *key=NULL;  EVP_PKEY *pkey=NULL;    key=BIO_new(BIO_s_file());  if (key == NULL)  { ....  }  if (BIO_read_filename(key,key_file) <= 0)  { ....  }   if (format == FORMAT_PEM)   {    pkey=PEM_read_bio_PrivateKey(key,NULL,NULL,NULL);   } ...................  if (key != NULL) BIO_free(key);  return(pkey); } ......   When it is called, pkey is always return NULL.   And When I use the private and certificate to make SSL connection, everything works well.  // Register a certificate from Cert file  if (SSL_CTX_use_certificate_file(pchSslSupport->sslCtx, certFile, cfType) <= 0)  {   SslErrorHandler(ERR_SSL_CTX_USE_CERTF_FAILED);   return(-1);  }  // Establish private key from Key file  if (SSL_CTX_use_PrivateKey_file(pchSslSupport->sslCtx, keyFile, kfType) <= 0)  {   SslErrorHandler(ERR_SSL_CTX_USE_PRIKEYF_FAILED);   return(-1);  }     What is wrong??   My private key file looks like : -----BEGIN RSA PRIVATE KEY----- Proc-Type: 4,ENCRYPTED DEK-Info: DES-EDE3-CBC,C780DCD57F8F0503 ................................................................................................................. -----END RSA PRIVATE KEY-----   Any advice is appreciated,   Dennis