#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. */
-#if !defined(EXIM_HAVE_OPENSSL_TLSEXT) && !defined(DISABLE_OCSP)
-# warning "OpenSSL library version too old; define DISABLE_OCSP in Makefile"
-# define DISABLE_OCSP
-#endif
-
#ifdef HAVE_OPENSSL
# define HAVE_TLS
# include <openssl/crypto.h>
# include <openssl/ssl.h>
# include <openssl/err.h>
# include <openssl/rand.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
# 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*/
/****************************************************************************/
#ifdef HAVE_OPENSSL
+# ifndef DISABLE_OCSP
-X509_STORE *
-setup_verify(BIO *bp, char *CAfile, char *CApath)
+static STACK_OF(X509) *
+chain_from_pem_file(const uschar * file)
{
- 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;
+BIO * bp;
+X509 * x;
+STACK_OF(X509) * sk;
+
+if (!(sk = sk_X509_new_null())) return NULL;
+if (!(bp = BIO_new_file(CS file, "r"))) return NULL;
+while ((x = PEM_read_bio_X509(bp, NULL, 0, NULL)))
+ sk_X509_push(sk, x);
+BIO_free(bp);
+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);
}
-#ifndef DISABLE_OCSP
static int
tls_client_stapling_cb(SSL *s, void *arg)
{
int len;
OCSP_RESPONSE *rsp;
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)))
+
+if (!(sk = chain_from_pem_file(ocsp_stapling)))
{
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)
+/* 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");
-X509_STORE_free(store);
+cert_stack_free(sk);
return ret;
}
-#endif
+# endif /*DISABLE_OCSP*/
/*************************************************
tls_start(int sock, SSL **ssl, SSL_CTX *ctx)
{
int rc;
-static const unsigned 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);
{
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);
/****************************************************************************/
+/* Turn "\n" and "\r" into the relevant characters. This is a hack. */
+
+static int
+unescape_buf(unsigned char * buf, int len)
+{
+unsigned char * s;
+unsigned char c, t;
+unsigned shift;
+
+for (s = buf; s < buf+len; s++) if (*s == '\\')
+ {
+ switch (s[1])
+ {
+ default: c = s[1]; shift = 1; break;
+ case 'n': c = '\n'; shift = 1; break;
+ case 'r': c = '\r'; shift = 1; break;
+ case 'x':
+ t = s[2];
+ if (t >= 'A' && t <= 'F') t -= 'A'-'9'-1;
+ else if (t >= 'a' && t <= 'f') t -= 'a'-'9'-1;
+ t -= '0';
+ c = (t<<4) & 0xf0;
+ t = s[3];
+ if (t >= 'A' && t <= 'F') t -= 'A'-'9'-1;
+ else if (t >= 'a' && t <= 'f') t -= 'a'-'9'-1;
+ t -= '0';
+ c |= t & 0xf;
+ shift = 3;
+ break;
+ }
+ *s = c;
+ memmove(s+1, s+shift+1, len-shift);
+ len -= shift;
+ }
+return len;
+}
+
+
/****************************************************************************/
*************************************************/
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\
[<key file>]\n\
\n";
-int main(int argc, char **argv)
+int
+main(int argc, char **argv)
{
struct sockaddr *s_ptr;
struct sockaddr_in s_in4;
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;
+ int crlf = 1;
+
+ /* 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);
+ n = unescape_buf(outbuffer, n);
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("Unexpected 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
{
}
printf("<<< %s\n", lineptr);
- if (strncmp(CS lineptr, CS outbuffer + 4, (int)strlen(CS outbuffer) - 4) != 0)
+ if (strncmp(CS lineptr, CS outbuffer + 4, n - 4) != 0)
{
printf("\n******** Input mismatch ********\n");
exit(79);
#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)
else
{
- unsigned char *escape;
+ unsigned char * out = outbuffer;
+
+ if (strncmp(CS outbuffer, ">>> ", 4) == 0)
+ {
+ crlf = 0;
+ out += 4;
+ n -= 4;
+ }
if (*inptr != 0)
{
printf("Unconsumed input: %s", inptr);
- printf(" About to send: %s\n", outbuffer);
+ printf(" About to send: %s\n", out);
exit(78);
}
/* Shutdown TLS */
- if (strcmp(CS outbuffer, "stoptls") == 0 ||
- strcmp(CS outbuffer, "STOPTLS") == 0)
+ if (strcmp(CS out, "stoptls") == 0 ||
+ strcmp(CS out, "STOPTLS") == 0)
{
if (!tls_active)
{
/* Remember that we sent STARTTLS */
- sent_starttls = (strcmp(CS outbuffer, "starttls") == 0 ||
- strcmp(CS outbuffer, "STARTTLS") == 0);
+ sent_starttls = (strcmp(CS out, "starttls") == 0 ||
+ strcmp(CS out, "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(CS outbuffer, "starttls_wait") == 0)
+ if (strcmp(CS out, "starttls_wait") == 0)
{
- outbuffer[8] = 0;
+ out[8] = 0;
n = 8;
}
#endif
- printf(">>> %s\n", outbuffer);
- strcpy(CS outbuffer + n, "\r\n");
-
- /* Turn "\n" and "\r" into the relevant characters. This is a hack. */
-
- while ((escape = US strstr(CS outbuffer, "\\r")) != NULL)
+ printf(">>> %s\n", out);
+ if (crlf)
{
- *escape = '\r';
- memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2);
- n--;
+ strcpy(CS out + n, "\r\n");
+ n += 2;
}
- while ((escape = US strstr(CS outbuffer, "\\n")) != NULL)
- {
- *escape = '\n';
- memmove(escape + 1, escape + 2, (n + 2) - (escape - outbuffer) - 2);
- n--;
- }
+ n = unescape_buf(out, n);
/* OK, do it */
if (tls_active)
{
#ifdef HAVE_OPENSSL
- rc = SSL_write (ssl, outbuffer, n + 2);
+ rc = SSL_write (ssl, out, n);
#endif
#ifdef HAVE_GNUTLS
- rc = gnutls_record_send(tls_session, CS outbuffer, n + 2);
- if (rc < 0)
+ if ((rc = gnutls_record_send(tls_session, CS out, n)) < 0)
{
printf("GnuTLS write error: %s\n", gnutls_strerror(rc));
exit(76);
#endif
}
else
- {
- rc = write(sock, outbuffer, n + 2);
- }
+ rc = write(sock, out, n);
alarm(0);
if (rc < 0)
}
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 / exim.git / blobdiff