c46990b13b
Two example programs one for command line argument processing and
one for configuration file processing.
(cherry picked from commit 3646578ae7)
125 lines
2.6 KiB
C
125 lines
2.6 KiB
C
#include <openssl/err.h>
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#include <openssl/ssl.h>
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#include <openssl/conf.h>
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int main(int argc, char **argv)
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{
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BIO *sbio = NULL, *out = NULL;
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int i, len, rv;
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char tmpbuf[1024];
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SSL_CTX *ctx = NULL;
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SSL_CONF_CTX *cctx = NULL;
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SSL *ssl = NULL;
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CONF *conf = NULL;
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STACK_OF(CONF_VALUE) *sect = NULL;
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CONF_VALUE *cnf;
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const char *connect_str = "localhost:4433";
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long errline = -1;
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ERR_load_crypto_strings();
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ERR_load_SSL_strings();
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SSL_library_init();
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conf = NCONF_new(NULL);
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if (NCONF_load(conf, "connect.cnf", &errline) <= 0)
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{
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if (errline <= 0)
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fprintf(stderr, "Error processing config file\n");
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else
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fprintf(stderr, "Error on line %ld\n", errline);
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goto end;
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}
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sect = NCONF_get_section(conf, "default");
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if (sect == NULL)
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{
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fprintf(stderr, "Error retrieving default section\n");
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goto end;
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}
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ctx = SSL_CTX_new(SSLv23_client_method());
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cctx = SSL_CONF_CTX_new();
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SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CLIENT);
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SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_FILE);
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SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
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for (i = 0; i < sk_CONF_VALUE_num(sect); i++)
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{
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cnf = sk_CONF_VALUE_value(sect, i);
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rv = SSL_CONF_cmd(cctx, cnf->name, cnf->value);
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if (rv > 0)
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continue;
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if (rv != -2)
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{
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fprintf(stderr, "Error processing %s = %s\n",
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cnf->name, cnf->value);
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ERR_print_errors_fp(stderr);
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goto end;
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}
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if (!strcmp(cnf->name, "Connect"))
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{
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connect_str = cnf->value;
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}
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else
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{
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fprintf(stderr, "Unknown configuration option %s\n",
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cnf->name);
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goto end;
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}
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}
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/* We'd normally set some stuff like the verify paths and
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* mode here because as things stand this will connect to
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* any server whose certificate is signed by any CA.
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*/
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sbio = BIO_new_ssl_connect(ctx);
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BIO_get_ssl(sbio, &ssl);
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if(!ssl)
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{
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fprintf(stderr, "Can't locate SSL pointer\n");
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goto end;
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}
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/* Don't want any retries */
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SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);
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/* We might want to do other things with ssl here */
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BIO_set_conn_hostname(sbio, connect_str);
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out = BIO_new_fp(stdout, BIO_NOCLOSE);
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if(BIO_do_connect(sbio) <= 0)
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{
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fprintf(stderr, "Error connecting to server\n");
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ERR_print_errors_fp(stderr);
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goto end;
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}
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if(BIO_do_handshake(sbio) <= 0)
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{
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fprintf(stderr, "Error establishing SSL connection\n");
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ERR_print_errors_fp(stderr);
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goto end;
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}
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/* Could examine ssl here to get connection info */
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BIO_puts(sbio, "GET / HTTP/1.0\n\n");
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for(;;)
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{
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len = BIO_read(sbio, tmpbuf, 1024);
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if(len <= 0) break;
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BIO_write(out, tmpbuf, len);
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}
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end:
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SSL_CONF_CTX_free(cctx);
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BIO_free_all(sbio);
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BIO_free(out);
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NCONF_free(conf);
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return 0;
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}
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