2 * A minimal program to serve an SSL connection. It uses blocking. It uses
3 * the SSL_CONF API with a configuration file. cc -I../../include saccept.c
4 * -L../.. -lssl -lcrypto -ldl
9 #include <openssl/err.h>
10 #include <openssl/ssl.h>
11 #include <openssl/conf.h>
13 int main(int argc, char *argv[])
15 char *port = "*:4433";
19 SSL_CONF_CTX *cctx = NULL;
21 STACK_OF(CONF_VALUE) *sect = NULL;
27 SSL_load_error_strings();
29 /* Add ciphers and message digests */
30 OpenSSL_add_ssl_algorithms();
32 conf = NCONF_new(NULL);
34 if (NCONF_load(conf, "accept.cnf", &errline) <= 0) {
36 fprintf(stderr, "Error processing config file\n");
38 fprintf(stderr, "Error on line %ld\n", errline);
42 sect = NCONF_get_section(conf, "default");
45 fprintf(stderr, "Error retrieving default section\n");
49 ctx = SSL_CTX_new(TLS_server_method());
50 cctx = SSL_CONF_CTX_new();
51 SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_SERVER);
52 SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CERTIFICATE);
53 SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_FILE);
54 SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
55 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
57 cnf = sk_CONF_VALUE_value(sect, i);
58 rv = SSL_CONF_cmd(cctx, cnf->name, cnf->value);
62 fprintf(stderr, "Error processing %s = %s\n",
63 cnf->name, cnf->value);
64 ERR_print_errors_fp(stderr);
67 if (strcmp(cnf->name, "Port") == 0) {
70 fprintf(stderr, "Unknown configuration option %s\n", cnf->name);
75 if (!SSL_CONF_CTX_finish(cctx)) {
76 fprintf(stderr, "Finish error\n");
77 ERR_print_errors_fp(stderr);
81 /* Setup server side SSL bio */
82 ssl_bio = BIO_new_ssl(ctx, 0);
84 if ((in = BIO_new_accept(port)) == NULL)
88 * This means that when a new connection is accepted on 'in', The ssl_bio
89 * will be 'duplicated' and have the new socket BIO push into it.
90 * Basically it means the SSL BIO will be automatically setup
92 BIO_set_accept_bios(in, ssl_bio);
96 * The first call will setup the accept socket, and the second will get a
97 * socket. In this loop, the first actual accept will occur in the
98 * BIO_read() function.
101 if (BIO_do_accept(in) <= 0)
105 i = BIO_read(in, buf, 512);
108 * If we have finished, remove the underlying BIO stack so the
109 * next time we call any function for this BIO, it will attempt
118 if (BIO_should_retry(in))
122 fwrite(buf, 1, i, stdout);
129 ERR_print_errors_fp(stderr);