/* A little hacked up program that makes a TCP/IP call and reads a script to
drive it, for testing Exim server code running as a daemon. It's got a bit
messy with the addition of support for either OpenSSL or GnuTLS. The code for
-those was hacked out of Exim itself. */
+those was hacked out of Exim itself, then code for OCSP stapling was ripped
+from the openssl ocsp and s_client utilities. */
/* ANSI C standard includes */
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <openssl/rand.h>
+#include <openssl/ocsp.h>
+
+char * ocsp_stapling = NULL;
#endif
/****************************************************************************/
#ifdef HAVE_OPENSSL
+
+X509_STORE *
+setup_verify(BIO *bp, char *CAfile, char *CApath)
+{
+ X509_STORE *store;
+ X509_LOOKUP *lookup;
+ if(!(store = X509_STORE_new())) goto end;
+ lookup=X509_STORE_add_lookup(store,X509_LOOKUP_file());
+ if (lookup == NULL) goto end;
+ if (CAfile) {
+ if(!X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM)) {
+ BIO_printf(bp, "Error loading file %s\n", CAfile);
+ goto end;
+ }
+ } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
+
+ lookup=X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir());
+ if (lookup == NULL) goto end;
+ if (CApath) {
+ if(!X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM)) {
+ BIO_printf(bp, "Error loading directory %s\n", CApath);
+ goto end;
+ }
+ } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
+
+ ERR_clear_error();
+ return store;
+ end:
+ X509_STORE_free(store);
+ return NULL;
+}
+
+
+static int
+tls_client_stapling_cb(SSL *s, void *arg)
+{
+const unsigned char *p;
+int len;
+OCSP_RESPONSE *rsp;
+OCSP_BASICRESP *bs;
+char *CAfile = NULL;
+X509_STORE *store = NULL;
+int ret = 1;
+
+len = SSL_get_tlsext_status_ocsp_resp(s, &p);
+/*BIO_printf(arg, "OCSP response: ");*/
+if (!p)
+ {
+ BIO_printf(arg, "no response received\n");
+ return 1;
+ }
+if(!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len)))
+ {
+ BIO_printf(arg, "response parse error\n");
+ BIO_dump_indent(arg, (char *)p, len, 4);
+ return 0;
+ }
+if(!(bs = OCSP_response_get1_basic(rsp)))
+ {
+ BIO_printf(arg, "error parsing response\n");
+ return 0;
+ }
+
+CAfile = ocsp_stapling;
+if(!(store = setup_verify(arg, CAfile, NULL)))
+ {
+ BIO_printf(arg, "error in cert setup\n");
+ return 0;
+ }
+
+/* No file of alternate certs, no options */
+if(OCSP_basic_verify(bs, NULL, store, 0) <= 0)
+ {
+ BIO_printf(arg, "Response Verify Failure\n");
+ ERR_print_errors(arg);
+ ret = 0;
+ }
+else
+ BIO_printf(arg, "Response verify OK\n");
+
+X509_STORE_free(store);
+return ret;
+}
+
+
/*************************************************
* Start an OpenSSL TLS session *
*************************************************/
SSL_set_fd (*ssl, sock);
SSL_set_connect_state(*ssl);
+if (ocsp_stapling)
+ {
+ SSL_CTX_set_tlsext_status_cb(ctx, tls_client_stapling_cb);
+ SSL_CTX_set_tlsext_status_arg(ctx, BIO_new_fp(stdout, BIO_NOCLOSE));
+ SSL_set_tlsext_status_type(*ssl, TLSEXT_STATUSTYPE_ocsp);
+ }
+
signal(SIGALRM, sigalrm_handler_flag);
sigalrm_seen = 0;
alarm(5);
* Main Program *
*************************************************/
-/* Usage: client
- <IP address>
- <port>
- [<outgoing interface>]
- [<cert file>]
- [<key file>]
-*/
+const char * const HELP_MESSAGE = "\n\
+Usage: client\n\
+ <IP address>\n\
+ <port>\n\
+ [<outgoing interface>]\n\
+ [<cert file>]\n\
+ [<key file>]\n\
+\n";
int main(int argc, char **argv)
{
char *address = NULL;
char *certfile = NULL;
char *keyfile = NULL;
+char *end = NULL;
int argi = 1;
int host_af, port, s_len, rc, sock, save_errno;
int timeout = 1;
int tls_active = 0;
int sent_starttls = 0;
int tls_on_connect = 0;
+long tmplong;
#if HAVE_IPV6
struct sockaddr_in6 s_in6;
while (argc >= argi + 1 && argv[argi][0] == '-')
{
+ if (strcmp(argv[argi], "-help") == 0 ||
+ strcmp(argv[argi], "--help") == 0 ||
+ strcmp(argv[argi], "-h") == 0)
+ {
+ printf(HELP_MESSAGE);
+ exit(0);
+ }
if (strcmp(argv[argi], "-tls-on-connect") == 0)
{
tls_on_connect = 1;
argi++;
}
+#ifdef HAVE_OPENSSL
+ else if (strcmp(argv[argi], "-ocsp") == 0)
+ {
+ if (argc < ++argi + 1)
+ {
+ fprintf(stderr, "Missing required certificate file for ocsp option\n");
+ exit(1);
+ }
+ ocsp_stapling = argv[argi++];
+ }
+#endif
else if (argv[argi][1] == 't' && isdigit(argv[argi][2]))
{
- timeout = atoi(argv[argi]+1);
+ tmplong = strtol(argv[argi]+2, &end, 10);
+ if (end == argv[argi]+2 || *end)
+ {
+ fprintf(stderr, "Failed to parse seconds from option <%s>\n",
+ argv[argi]);
+ exit(1);
+ }
+ if (tmplong > 10000L)
+ {
+ fprintf(stderr, "Unreasonably long wait of %d seconds requested\n",
+ tmplong);
+ exit(1);
+ }
+ if (tmplong < 0L)
+ {
+ fprintf(stderr, "Timeout must not be negative (%d)\n", tmplong);
+ exit(1);
+ }
+ timeout = (int) tmplong;
argi++;
}
else
{
- printf("Unrecognized option %s\n", argv[argi]);
+ fprintf(stderr, "Unrecognized option %s\n", argv[argi]);
exit(1);
}
}
if (argc < argi+1)
{
- printf("No IP address given\n");
+ fprintf(stderr, "No IP address given\n");
exit(1);
}
if (argc < argi+1)
{
- printf("No port number given\n");
+ fprintf(stderr, "No port number given\n");
exit(1);
}
git://git.exim.org / users / jgh / exim.git / blobdiff