#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
+#include <netinet/tcp.h>
#include <netdb.h>
#include <arpa/inet.h>
/* TLS support can be optionally included, either for OpenSSL or GnuTLS. The
latter needs a whole pile of tables. */
-
#ifdef HAVE_OPENSSL
# define HAVE_TLS
# include <openssl/crypto.h>
# include <openssl/ssl.h>
# include <openssl/err.h>
# include <openssl/rand.h>
-# include <openssl/ocsp.h>
+
+# if OPENSSL_VERSION_NUMBER < 0x0090806fL && !defined(DISABLE_OCSP) && !defined(OPENSSL_NO_TLSEXT)
+# warning "OpenSSL library version too old; define DISABLE_OCSP in Makefile"
+# define DISABLE_OCSP
+# endif
+# ifndef DISABLE_OCSP
+# include <openssl/ocsp.h>
+# endif
#endif
# define HAVE_OCSP
# include <gnutls/ocsp.h>
# endif
+# ifndef GNUTLS_NO_EXTENSIONS
+# define GNUTLS_NO_EXTENSIONS 0
+# endif
# define DH_BITS 768
/* Local static variables for GNUTLS */
-static gnutls_dh_params dh_params = NULL;
+static gnutls_dh_params_t dh_params = NULL;
static gnutls_certificate_credentials_t x509_cred = NULL;
-static gnutls_session tls_session = NULL;
+static gnutls_session_t tls_session = NULL;
static int ssl_session_timeout = 200;
/* Priorities for TLS algorithms to use. */
+#if GNUTLS_VERSION_NUMBER < 0x030400
static const int protocol_priority[16] = { GNUTLS_TLS1, GNUTLS_SSL3, 0 };
static const int kx_priority[16] = {
0 };
static const int comp_priority[16] = { GNUTLS_COMP_NULL, 0 };
-static const int cert_type_priority[16] = { GNUTLS_CRT_X509, 0 };
+#endif
#endif /*HAVE_GNUTLS*/
}
+#ifndef DISABLE_OCSP
+static STACK_OF(X509) *
+cert_stack_from_store(X509_STORE * store)
+{
+STACK_OF(X509_OBJECT) * roots= store->objs;
+STACK_OF(X509) * sk = sk_X509_new_null();
+int i;
+
+for(i = sk_X509_OBJECT_num(roots) - 1; i >= 0; i--)
+ {
+ X509_OBJECT * tmp_obj= sk_X509_OBJECT_value(roots, i);
+ if(tmp_obj->type == X509_LU_X509)
+ {
+ X509 * x = tmp_obj->data.x509;
+ sk_X509_push(sk, x);
+ }
+ }
+return sk;
+}
+
+static void
+cert_stack_free(STACK_OF(X509) * sk)
+{
+while (sk_X509_num(sk) > 0) (void) sk_X509_pop(sk);
+sk_X509_free(sk);
+}
+
+
static int
tls_client_stapling_cb(SSL *s, void *arg)
{
OCSP_BASICRESP *bs;
char *CAfile = NULL;
X509_STORE *store = NULL;
+STACK_OF(X509) * sk;
int ret = 1;
len = SSL_get_tlsext_status_ocsp_resp(s, &p);
return 0;
}
+
CAfile = ocsp_stapling;
if(!(store = setup_verify(arg, CAfile, NULL)))
{
return 0;
}
-/* No file of alternate certs, no options */
-if(OCSP_basic_verify(bs, NULL, store, 0) <= 0)
+sk = cert_stack_from_store(store);
+
+/* OCSP_basic_verify takes a "store" arg, but does not
+use it for the chain verification, which is all we do
+when OCSP_NOVERIFY is set. The content from the wire
+(in "bs") and a cert-stack "sk" are all that is used. */
+
+if(OCSP_basic_verify(bs, sk, NULL, OCSP_NOVERIFY) <= 0)
{
BIO_printf(arg, "Response Verify Failure\n");
ERR_print_errors(arg);
else
BIO_printf(arg, "Response verify OK\n");
+cert_stack_free(sk);
X509_STORE_free(store);
return ret;
}
+#endif
/*************************************************
tls_start(int sock, SSL **ssl, SSL_CTX *ctx)
{
int rc;
-static const char *sid_ctx = "exim";
+static const unsigned char *sid_ctx = US"exim";
RAND_load_file("client.c", -1); /* Not *very* random! */
*ssl = SSL_new (ctx);
-SSL_set_session_id_context(*ssl, sid_ctx, strlen(sid_ctx));
+SSL_set_session_id_context(*ssl, sid_ctx, strlen(CS sid_ctx));
SSL_set_fd (*ssl, sock);
SSL_set_connect_state(*ssl);
+#ifndef DISABLE_OCSP
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);
}
+#endif
signal(SIGALRM, sigalrm_handler_flag);
sigalrm_seen = 0;
{
int fd;
int ret;
-gnutls_datum m;
+gnutls_datum_t m;
uschar filename[200];
struct stat statbuf;
* Initialize a single GNUTLS session *
*************************************************/
-static gnutls_session
+static gnutls_session_t
tls_session_init(void)
{
-gnutls_session session;
+gnutls_session_t session;
-gnutls_init(&session, GNUTLS_CLIENT);
+gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_NO_EXTENSIONS);
+#if GNUTLS_VERSION_NUMBER < 0x030400
gnutls_cipher_set_priority(session, default_cipher_priority);
gnutls_compression_set_priority(session, comp_priority);
gnutls_kx_set_priority(session, kx_priority);
gnutls_mac_set_priority(session, mac_priority);
gnutls_cred_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+#else
+gnutls_set_default_priority(session);
+gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+#endif
gnutls_dh_set_prime_bits(session, DH_BITS);
gnutls_db_set_cache_expiration(session, ssl_session_timeout);
*************************************************/
const char * const HELP_MESSAGE = "\n\
-Usage: client\n\
+Usage: client\n"
+#ifdef HAVE_TLS
+"\
+ [-tls-on-connect]\n\
+ [-ocsp]\n"
+#endif
+"\
+ [-tn] n seconds timeout\n\
<IP address>\n\
<port>\n\
[<outgoing interface>]\n\
if (ocsp_stapling)
gnutls_ocsp_status_request_enable_client(tls_session, NULL, 0, NULL);
#endif
-gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr)sock);
+gnutls_transport_set_ptr(tls_session, (gnutls_transport_ptr_t)(intptr_t)sock);
/* When the server asks for a certificate and the client does not have one,
there is a SIGPIPE error in the gnutls_handshake() function for some reason
{
printf("Attempting to start TLS\n");
- #ifdef HAVE_OPENSSL
+#ifdef HAVE_OPENSSL
tls_active = tls_start(sock, &ssl, ctx);
- #endif
+#endif
- #ifdef HAVE_GNUTLS
+#ifdef HAVE_GNUTLS
+ {
+ int rc;
sigalrm_seen = FALSE;
alarm(timeout);
- tls_active = gnutls_handshake(tls_session) >= 0;
+ do {
+ rc = gnutls_handshake(tls_session);
+ } while (rc < 0 && gnutls_error_is_fatal(rc) == 0);
+ tls_active = rc >= 0;
alarm(0);
- #endif
+
+ if (!tls_active) printf("%s\n", gnutls_strerror(rc));
+ }
+#endif
if (!tls_active)
printf("Failed to start TLS\n");
- #if defined(HAVE_GNUTLS) && defined(HAVE_OCSP)
+#if defined(HAVE_GNUTLS) && defined(HAVE_OCSP)
else if ( ocsp_stapling
&& gnutls_ocsp_status_request_is_checked(tls_session, 0) == 0)
printf("Failed to verify certificate status\n");
- #endif
+#endif
else
printf("Succeeded in starting TLS\n");
}
while (fgets(CS outbuffer, sizeof(outbuffer), stdin) != NULL)
{
int n = (int)strlen(CS outbuffer);
- while (n > 0 && isspace(outbuffer[n-1])) n--;
- outbuffer[n] = 0;
+
+ /* Strip trailing newline */
+ if (outbuffer[n-1] == '\n') outbuffer[--n] = 0;
/* Expect incoming */
- if (strncmp(CS outbuffer, "??? ", 4) == 0)
+ if ( strncmp(CS outbuffer, "???", 3) == 0
+ && (outbuffer[3] == ' ' || outbuffer[3] == '*')
+ )
{
unsigned char *lineptr;
+ unsigned exp_eof = outbuffer[3] == '*';
+
printf("%s\n", outbuffer);
if (*inptr == 0) /* Refill input buffer */
}
if (rc < 0)
- {
+ {
printf("Read error %s\n", strerror(errno));
- exit(81) ;
- }
+ exit(81);
+ }
else if (rc == 0)
+ if (exp_eof)
+ {
+ printf("Expected EOF read\n");
+ continue;
+ }
+ else
+ {
+ printf("Enexpected EOF read\n");
+ close(sock);
+ exit(80);
+ }
+ else if (exp_eof)
{
- printf("Unexpected EOF read\n");
+ printf("Expected EOF not read\n");
close(sock);
- exit(80);
+ exit(74);
}
else
{
#endif
#ifdef HAVE_GNUTLS
- sigalrm_seen = FALSE;
- alarm(timeout);
- tls_active = gnutls_handshake(tls_session) >= 0;
- alarm(0);
+ {
+ int rc;
+ sigalrm_seen = FALSE;
+ alarm(timeout);
+ do {
+ rc = gnutls_handshake(tls_session);
+ } while (rc < 0 && gnutls_error_is_fatal(rc) == 0);
+ tls_active = rc >= 0;
+ alarm(0);
+
+ if (!tls_active) printf("%s\n", gnutls_strerror(rc));
+ }
#endif
if (!tls_active)
/* Shutdown TLS */
- if (strcmp(outbuffer, "stoptls") == 0 ||
- strcmp(outbuffer, "STOPTLS") == 0)
+ if (strcmp(CS outbuffer, "stoptls") == 0 ||
+ strcmp(CS outbuffer, "STOPTLS") == 0)
{
if (!tls_active)
{
/* Remember that we sent STARTTLS */
- sent_starttls = (strcmp(outbuffer, "starttls") == 0 ||
- strcmp(outbuffer, "STARTTLS") == 0);
+ sent_starttls = (strcmp(CS outbuffer, "starttls") == 0 ||
+ strcmp(CS outbuffer, "STARTTLS") == 0);
/* Fudge: if the command is "starttls_wait", we send the starttls bit,
but we haven't set the flag, so that there is no negotiation. This is for
testing the server's timeout. */
- if (strcmp(outbuffer, "starttls_wait") == 0)
+ if (strcmp(CS outbuffer, "starttls_wait") == 0)
{
outbuffer[8] = 0;
n = 8;
n--;
}
- while ((escape = strstr(outbuffer, "\\n")) != NULL)
+ while ((escape = US strstr(CS outbuffer, "\\n")) != NULL)
{
*escape = '\n';
memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2);
}
printf("End of script\n");
+shutdown(sock, SHUT_WR);
+while ((rc = read(sock, inbuffer, sizeof(inbuffer))) > 0) ;
close(sock);
exit(0);
git://git.exim.org / users / jgh / exim.git / blobdiff