demos/bio/sconnect.c

   1 /* NOCW */
   2 /* demos/bio/sconnect.c */
   3
   4 /* A minimal program to do SSL to a passed host and port.
   5  * It is actually using non-blocking IO but in a very simple manner
   6  * sconnect host:port - it does a 'GET / HTTP/1.0'
   7  *
   8  * cc -I../../include sconnect.c -L../.. -lssl -lcrypto
   9  */
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include "err.h"
  13 #include "ssl.h"
  14
  15 extern int errno;
  16
  17 int main(argc,argv)
  18 int argc;
  19 char *argv[];
  20         {
  21         char *host;
  22         BIO *out;
  23         char buf[1024*10],*p;
  24         SSL_CTX *ssl_ctx=NULL;
  25         SSL *ssl;
  26         BIO *ssl_bio;
  27         int i,len,off,ret=1;
  28
  29         if (argc <= 1)
  30                 host="localhost:4433";
  31         else
  32                 host=argv[1];
  33
  34         /* Lets get nice error messages */
  35         SSL_load_error_strings();
  36
  37         /* Setup all the global SSL stuff */
  38         SSLeay_add_ssl_algorithms();
  39         ssl_ctx=SSL_CTX_new(SSLv23_client_method());
  40
  41         /* Lets make a SSL structure */
  42         ssl=SSL_new(ssl_ctx);
  43         SSL_set_connect_state(ssl);
  44
  45         /* Use it inside an SSL BIO */
  46         ssl_bio=BIO_new(BIO_f_ssl());
  47         BIO_set_ssl(ssl_bio,ssl,BIO_CLOSE);
  48
  49         /* Lets use a connect BIO under the SSL BIO */
  50         out=BIO_new(BIO_s_connect());
  51         BIO_set_conn_hostname(out,host);
  52         BIO_set_nbio(out,1);
  53         out=BIO_push(ssl_bio,out);
  54
  55         p="GET / HTTP/1.0\r\n\r\n";
  56         len=strlen(p);
  57
  58         off=0;
  59         for (;;)
  60                 {
  61                 i=BIO_write(out,&(p[off]),len);
  62                 if (i <= 0)
  63                         {
  64                         if (BIO_should_retry(out))
  65                                 {
  66                                 fprintf(stderr,"write DELAY\n");
  67                                 sleep(1);
  68                                 continue;
  69                                 }
  70                         else
  71                                 {
  72                                 goto err;
  73                                 }
  74                         }
  75                 off+=i;
  76                 len-=i;
  77                 if (len <= 0) break;
  78                 }
  79
  80         for (;;)
  81                 {
  82                 i=BIO_read(out,buf,sizeof(buf));
  83                 if (i == 0) break;
  84                 if (i < 0)
  85                         {
  86                         if (BIO_should_retry(out))
  87                                 {
  88                                 fprintf(stderr,"read DELAY\n");
  89                                 sleep(1);
  90                                 continue;
  91                                 }
  92                         goto err;
  93                         }
  94                 fwrite(buf,1,i,stdout);
  95                 }
  96
  97         ret=1;
  98
  99         if (0)
 100                 {
 101 err:
 102                 if (ERR_peek_error() == 0) /* system call error */
 103                         {
 104                         fprintf(stderr,"errno=%d ",errno);
 105                         perror("error");
 106                         }
 107                 else
 108                         ERR_print_errors_fp(stderr);
 109                 }
 110         BIO_free_all(out);
 111         if (ssl_ctx != NULL) SSL_CTX_free(ssl_ctx);
 112         exit(!ret);
 113         return(ret);
 114         }
 115