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/*
* Copyright (C) 2001 Sebastian Krahmer.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Sebastian Krahmer.
* 4. The name Sebastian Krahmer may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdio.h>
#include <openssl/ssl.h>
#include <openssl/bio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include "session.h"
int main(int argc, char **argv)
{
struct hostent *he;
struct sockaddr_in sin;
BIO *bio;
X509 *x509;
int sfd;
if (argc < 3) {
printf("\ncf -- SSL certfetch (C) 2001 by Sebastian Krahmer\n\n");
printf("Usage: %s <host> <port>\n\n", *argv);
exit(1);
}
// Usual network stuff
if ((sfd = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
exit(errno);
}
if ((he = gethostbyname(argv[1])) == NULL) {
herror("gethostbyname");
exit(1);
}
memset(&sin, 0, sizeof(sin));
sin.sin_port = htons(atoi(argv[2]));
sin.sin_family = AF_INET;
memcpy(&sin.sin_addr.s_addr, he->h_addr, he->h_length);
if (connect(sfd, (struct sockaddr*)&sin, sizeof(sin)) < 0) {
perror("connect");
exit(errno);
}
// start client-session
CSession *sess = NULL;
try {
sess = new CSession;
} catch (int) {
fprintf(stderr, "%s", sess->why());
exit(1);
}
sess->start();
sess->fileno(sfd);
if (sess->connect() < 0) {
fprintf(stderr, "Host not SSL capable (handshake failed).\n");
exit(2);
}
// and lets get the certificate
x509 = SSL_get_peer_certificate(sess->ssl());
if (!x509) {
fprintf(stderr, "Host has no cert.\n");
exit(3);
}
// just print in readable form. :> 'openssl x509 -text < cert for
// analyzation must be done by you.
bio = BIO_new_fp(stdout, 0);
PEM_write_bio_X509(bio, x509);
BIO_flush(bio);
return 0;
}
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