demos/bio/sconnect.c

   1 /* NOCW */
   2 /* demos/bio/sconnect.c */
   3
   4 /*-
   5  * A minimal program to do SSL to a passed host and port.
   6  * It is actually using non-blocking IO but in a very simple manner
   7  * sconnect host:port - it does a 'GET / HTTP/1.0'
   8  *
   9  * cc -I../../include sconnect.c -L../.. -lssl -lcrypto
  10  */
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <openssl/err.h>
  15 #include <openssl/ssl.h>
  16
  17 extern int errno;
  18
  19 int main(argc, argv)
  20 int argc;
  21 char *argv[];
  22 {
  23     char *host;
  24     BIO *out;
  25     char buf[1024 * 10], *p;
  26     SSL_CTX *ssl_ctx = NULL;
  27     SSL *ssl;
  28     BIO *ssl_bio;
  29     int i, len, off, ret = 1;
  30
  31     if (argc <= 1)
  32         host = "localhost:4433";
  33     else
  34         host = argv[1];
  35
  36 #ifdef WATT32
  37     dbug_init();
  38     sock_init();
  39 #endif
  40
  41     /* Lets get nice error messages */
  42     SSL_load_error_strings();
  43
  44     /* Setup all the global SSL stuff */
  45     OpenSSL_add_ssl_algorithms();
  46     ssl_ctx = SSL_CTX_new(SSLv23_client_method());
  47
  48     /* Lets make a SSL structure */
  49     ssl = SSL_new(ssl_ctx);
  50     SSL_set_connect_state(ssl);
  51
  52     /* Use it inside an SSL BIO */
  53     ssl_bio = BIO_new(BIO_f_ssl());
  54     BIO_set_ssl(ssl_bio, ssl, BIO_CLOSE);
  55
  56     /* Lets use a connect BIO under the SSL BIO */
  57     out = BIO_new(BIO_s_connect());
  58     BIO_set_conn_hostname(out, host);
  59     BIO_set_nbio(out, 1);
  60     out = BIO_push(ssl_bio, out);
  61
  62     p = "GET / HTTP/1.0\r\n\r\n";
  63     len = strlen(p);
  64
  65     off = 0;
  66     for (;;) {
  67         i = BIO_write(out, &(p[off]), len);
  68         if (i <= 0) {
  69             if (BIO_should_retry(out)) {
  70                 fprintf(stderr, "write DELAY\n");
  71                 sleep(1);
  72                 continue;
  73             } else {
  74                 goto err;
  75             }
  76         }
  77         off += i;
  78         len -= i;
  79         if (len <= 0)
  80             break;
  81     }
  82
  83     for (;;) {
  84         i = BIO_read(out, buf, sizeof(buf));
  85         if (i == 0)
  86             break;
  87         if (i < 0) {
  88             if (BIO_should_retry(out)) {
  89                 fprintf(stderr, "read DELAY\n");
  90                 sleep(1);
  91                 continue;
  92             }
  93             goto err;
  94         }
  95         fwrite(buf, 1, i, stdout);
  96     }
  97
  98     ret = 1;
  99
 100     if (0) {
 101  err:
 102         if (ERR_peek_error() == 0) { /* system call error */
 103             fprintf(stderr, "errno=%d ", errno);
 104             perror("error");
 105         } else
 106             ERR_print_errors_fp(stderr);
 107     }
 108     BIO_free_all(out);
 109     if (ssl_ctx != NULL)
 110         SSL_CTX_free(ssl_ctx);
 111     exit(!ret);
 112     return (ret);
 113 }