1 /* 2 * Copyright 2013-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <string.h> 11 #include <openssl/err.h> 12 #include <openssl/ssl.h> 13 #include <openssl/conf.h> 14 15 int main(int argc, char **argv) 16 { 17 BIO *sbio = NULL, *out = NULL; 18 int i, len, rv; 19 char tmpbuf[1024]; 20 SSL_CTX *ctx = NULL; 21 SSL_CONF_CTX *cctx = NULL; 22 SSL *ssl = NULL; 23 CONF *conf = NULL; 24 STACK_OF(CONF_VALUE) *sect = NULL; 25 CONF_VALUE *cnf; 26 const char *connect_str = "localhost:4433"; 27 long errline = -1; 28 29 conf = NCONF_new(NULL); 30 31 if (NCONF_load(conf, "connect.cnf", &errline) <= 0) { 32 if (errline <= 0) 33 fprintf(stderr, "Error processing config file\n"); 34 else 35 fprintf(stderr, "Error on line %ld\n", errline); 36 goto end; 37 } 38 39 sect = NCONF_get_section(conf, "default"); 40 41 if (sect == NULL) { 42 fprintf(stderr, "Error retrieving default section\n"); 43 goto end; 44 } 45 46 ctx = SSL_CTX_new(TLS_client_method()); 47 cctx = SSL_CONF_CTX_new(); 48 SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CLIENT); 49 SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_FILE); 50 SSL_CONF_CTX_set_ssl_ctx(cctx, ctx); 51 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) { 52 cnf = sk_CONF_VALUE_value(sect, i); 53 rv = SSL_CONF_cmd(cctx, cnf->name, cnf->value); 54 if (rv > 0) 55 continue; 56 if (rv != -2) { 57 fprintf(stderr, "Error processing %s = %s\n", 58 cnf->name, cnf->value); 59 ERR_print_errors_fp(stderr); 60 goto end; 61 } 62 if (strcmp(cnf->name, "Connect") == 0) { 63 connect_str = cnf->value; 64 } else { 65 fprintf(stderr, "Unknown configuration option %s\n", cnf->name); 66 goto end; 67 } 68 } 69 70 if (!SSL_CONF_CTX_finish(cctx)) { 71 fprintf(stderr, "Finish error\n"); 72 ERR_print_errors_fp(stderr); 73 goto end; 74 } 75 76 /* 77 * We'd normally set some stuff like the verify paths and * mode here 78 * because as things stand this will connect to * any server whose 79 * certificate is signed by any CA. 80 */ 81 82 sbio = BIO_new_ssl_connect(ctx); 83 84 BIO_get_ssl(sbio, &ssl); 85 86 if (!ssl) { 87 fprintf(stderr, "Can't locate SSL pointer\n"); 88 goto end; 89 } 90 91 /* We might want to do other things with ssl here */ 92 93 BIO_set_conn_hostname(sbio, connect_str); 94 95 out = BIO_new_fp(stdout, BIO_NOCLOSE); 96 if (BIO_do_connect(sbio) <= 0) { 97 fprintf(stderr, "Error connecting to server\n"); 98 ERR_print_errors_fp(stderr); 99 goto end; 100 } 101 102 /* Could examine ssl here to get connection info */ 103 104 BIO_puts(sbio, "GET / HTTP/1.0\n\n"); 105 for (;;) { 106 len = BIO_read(sbio, tmpbuf, 1024); 107 if (len <= 0) 108 break; 109 BIO_write(out, tmpbuf, len); 110 } 111 end: 112 SSL_CONF_CTX_free(cctx); 113 BIO_free_all(sbio); 114 BIO_free(out); 115 NCONF_free(conf); 116 return 0; 117 } 118