demos/bio/client-conf.c

   1 #include <openssl/err.h>
   2 #include <openssl/ssl.h>
   3 #include <openssl/conf.h>
   4
   5 int main(int argc, char **argv)
   6         {
   7         BIO *sbio = NULL, *out = NULL;
   8         int i, len, rv;
   9         char tmpbuf[1024];
  10         SSL_CTX *ctx = NULL;
  11         SSL_CONF_CTX *cctx = NULL;
  12         SSL *ssl = NULL;
  13         CONF *conf = NULL;
  14         STACK_OF(CONF_VALUE) *sect = NULL;
  15         CONF_VALUE *cnf;
  16         const char *connect_str = "localhost:4433";
  17         long errline = -1;
  18
  19         ERR_load_crypto_strings();
  20         ERR_load_SSL_strings();
  21         SSL_library_init();
  22
  23         conf = NCONF_new(NULL);
  24
  25         if (NCONF_load(conf, "connect.cnf", &errline) <= 0)
  26                 {
  27                 if (errline <= 0)
  28                         fprintf(stderr, "Error processing config file\n");
  29                 else
  30                         fprintf(stderr, "Error on line %ld\n", errline);
  31                 goto end;
  32                 }
  33
  34         sect = NCONF_get_section(conf, "default");
  35
  36         if (sect == NULL)
  37                 {
  38                 fprintf(stderr, "Error retrieving default section\n");
  39                 goto end;
  40                 }
  41
  42         ctx = SSL_CTX_new(SSLv23_client_method());
  43         cctx = SSL_CONF_CTX_new();
  44         SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CLIENT);
  45         SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_FILE);
  46         SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
  47         for (i = 0; i < sk_CONF_VALUE_num(sect); i++)
  48                 {
  49                 cnf = sk_CONF_VALUE_value(sect, i);
  50                 rv = SSL_CONF_cmd(cctx, cnf->name, cnf->value);
  51                 if (rv > 0)
  52                         continue;
  53                 if (rv != -2)
  54                         {
  55                         fprintf(stderr, "Error processing %s = %s\n",
  56                                                 cnf->name, cnf->value);
  57                         ERR_print_errors_fp(stderr);
  58                         goto end;
  59                         }
  60                 if (!strcmp(cnf->name, "Connect"))
  61                         {
  62                         connect_str = cnf->value;
  63                         }
  64                 else
  65                         {
  66                         fprintf(stderr, "Unknown configuration option %s\n",
  67                                                         cnf->name);
  68                         goto end;
  69                         }
  70                 }
  71
  72         /* We'd normally set some stuff like the verify paths and
  73         * mode here because as things stand this will connect to
  74         * any server whose certificate is signed by any CA.
  75          */
  76
  77         sbio = BIO_new_ssl_connect(ctx);
  78
  79         BIO_get_ssl(sbio, &ssl);
  80
  81         if(!ssl)
  82                 {
  83                 fprintf(stderr, "Can't locate SSL pointer\n");
  84                 goto end;
  85                 }
  86
  87         /* Don't want any retries */
  88         SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);
  89
  90         /* We might want to do other things with ssl here */
  91
  92         BIO_set_conn_hostname(sbio, connect_str);
  93
  94         out = BIO_new_fp(stdout, BIO_NOCLOSE);
  95         if(BIO_do_connect(sbio) <= 0)
  96                 {
  97                 fprintf(stderr, "Error connecting to server\n");
  98                 ERR_print_errors_fp(stderr);
  99                 goto end;
 100                 }
 101
 102         if(BIO_do_handshake(sbio) <= 0)
 103                 {
 104                 fprintf(stderr, "Error establishing SSL connection\n");
 105                 ERR_print_errors_fp(stderr);
 106                 goto end;
 107                 }
 108
 109         /* Could examine ssl here to get connection info */
 110
 111         BIO_puts(sbio, "GET / HTTP/1.0\n\n");
 112         for(;;)
 113                 {
 114                 len = BIO_read(sbio, tmpbuf, 1024);
 115                 if(len <= 0) break;
 116                 BIO_write(out, tmpbuf, len);
 117                 }
 118         end:
 119         SSL_CONF_CTX_free(cctx);
 120         BIO_free_all(sbio);
 121         BIO_free(out);
 122         NCONF_free(conf);
 123         return 0;
 124         }
 125