139 lines
3.6 KiB
C
139 lines
3.6 KiB
C
/* NOCW */
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/* demos/bio/saccept-conf.c */
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/*
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* A minimal program to serve an SSL connection. It uses blocking. It uses
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* the SSL_CONF API with a configuration file. cc -I../../include saccept.c
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* -L../.. -lssl -lcrypto -ldl
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*/
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#include <stdio.h>
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#include <signal.h>
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#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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char *port = "*:4433";
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BIO *in = NULL;
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BIO *ssl_bio, *tmp;
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SSL_CTX *ctx;
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SSL_CONF_CTX *cctx = 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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long errline = -1;
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char buf[512];
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int ret = 1, i;
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SSL_load_error_strings();
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/* Add ciphers and message digests */
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OpenSSL_add_ssl_algorithms();
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conf = NCONF_new(NULL);
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if (NCONF_load(conf, "accept.cnf", &errline) <= 0) {
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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 err;
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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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fprintf(stderr, "Error retrieving default section\n");
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goto err;
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}
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ctx = SSL_CTX_new(SSLv23_server_method());
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cctx = SSL_CONF_CTX_new();
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SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_SERVER);
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SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CERTIFICATE);
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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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int rv;
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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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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 err;
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}
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if (!strcmp(cnf->name, "Port")) {
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port = cnf->value;
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} else {
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fprintf(stderr, "Unknown configuration option %s\n", cnf->name);
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goto err;
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}
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}
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if (!SSL_CONF_CTX_finish(cctx)) {
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fprintf(stderr, "Finish error\n");
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ERR_print_errors_fp(stderr);
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goto err;
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}
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/* Setup server side SSL bio */
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ssl_bio = BIO_new_ssl(ctx, 0);
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if ((in = BIO_new_accept(port)) == NULL)
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goto err;
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/*
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* This means that when a new connection is accepted on 'in', The ssl_bio
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* will be 'duplicated' and have the new socket BIO push into it.
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* Basically it means the SSL BIO will be automatically setup
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*/
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BIO_set_accept_bios(in, ssl_bio);
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again:
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/*
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* The first call will setup the accept socket, and the second will get a
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* socket. In this loop, the first actual accept will occur in the
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* BIO_read() function.
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*/
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if (BIO_do_accept(in) <= 0)
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goto err;
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for (;;) {
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i = BIO_read(in, buf, 512);
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if (i == 0) {
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/*
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* If we have finished, remove the underlying BIO stack so the
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* next time we call any function for this BIO, it will attempt
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* to do an accept
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*/
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printf("Done\n");
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tmp = BIO_pop(in);
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BIO_free_all(tmp);
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goto again;
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}
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if (i < 0) {
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if (BIO_should_retry(in))
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continue;
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goto err;
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}
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fwrite(buf, 1, i, stdout);
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fflush(stdout);
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}
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ret = 0;
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err:
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if (ret) {
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ERR_print_errors_fp(stderr);
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}
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if (in != NULL)
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BIO_free(in);
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exit(ret);
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return (!ret);
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}
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