[Buzilla 376] Preliminary DKIM support

[exim.git] / src / src / tls-openssl.c

diff --git a/src/src/tls-openssl.c b/src/src/tls-openssl.c
index c9bdcf79c1f3909982fc0aa0a3edff921ce91153..a9b67dcdd3876e1bdb537febecba522a701ef99a 100644 (file)
--- a/src/src/tls-openssl.c
+++ b/src/src/tls-openssl.c
@@ -1,10 +1,10 @@
-/* $Cambridge: exim/src/src/tls-openssl.c,v 1.5 2005/05/03 14:20:01 ph10 Exp $ */
+/* $Cambridge: exim/src/src/tls-openssl.c,v 1.12 2007/04/13 15:13:47 ph10 Exp $ */
 
 /*************************************************
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2005 */
+/* Copyright (c) University of Cambridge 1995 - 2007 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* This module provides the TLS (aka SSL) support for Exim using the OpenSSL
@@ -290,8 +290,8 @@ Returns:          OK/DEFER/FAIL
 */
 
 static int
-tls_init(host_item *host, uschar *dhparam, uschar *certificate, uschar *privatekey,
-  address_item *addr)
+tls_init(host_item *host, uschar *dhparam, uschar *certificate,
+  uschar *privatekey, address_item *addr)
 {
 SSL_load_error_strings();          /* basic set up */
 OpenSSL_add_ssl_algorithms();
@@ -343,8 +343,7 @@ if (!RAND_status())
 /* Set up the information callback, which outputs if debugging is at a suitable
 level. */
 
-if (!(SSL_CTX_set_info_callback(ctx, (void (*)())info_callback)))
-  return tls_error(US"SSL_CTX_set_info_callback", host);
+SSL_CTX_set_info_callback(ctx, (void (*)())info_callback);
 
 /* The following patch was supplied by Robert Roselius */
 
@@ -386,7 +385,11 @@ if (certificate != NULL)
       !expand_check(privatekey, US"tls_privatekey", &expanded))
     return DEFER;
 
-  if (expanded != NULL)
+  /* If expansion was forced to fail, key_expanded will be NULL. If the result
+  of the expansion is an empty string, ignore it also, and assume the private
+  key is in the same file as the certificate. */
+
+  if (expanded != NULL && *expanded != 0)
     {
     DEBUG(D_tls) debug_printf("tls_privatekey file %s\n", expanded);
     if (!SSL_CTX_use_PrivateKey_file(ctx, CS expanded, SSL_FILETYPE_PEM))
@@ -594,6 +597,11 @@ a TLS session.
 
 Arguments:
   require_ciphers   allowed ciphers
+  ------------------------------------------------------
+  require_mac      list of allowed MACs                 ) Not used
+  require_kx       list of allowed key_exchange methods )   for
+  require_proto    list of allowed protocols            ) OpenSSL
+  ------------------------------------------------------
 
 Returns:            OK on success
                     DEFER for errors before the start of the negotiation
@@ -602,7 +610,8 @@ Returns:            OK on success
 */
 
 int
-tls_server_start(uschar *require_ciphers)
+tls_server_start(uschar *require_ciphers, uschar *require_mac,
+  uschar *require_kx, uschar *require_proto)
 {
 int rc;
 uschar *expciphers;
@@ -680,7 +689,8 @@ if (!tls_on_connect)
 /* Now negotiate the TLS session. We put our own timer on it, since it seems
 that the OpenSSL library doesn't. */
 
-SSL_set_fd(ssl, fileno(smtp_out));
+SSL_set_wfd(ssl, fileno(smtp_out));
+SSL_set_rfd(ssl, fileno(smtp_in));
 SSL_set_accept_state(ssl);
 
 DEBUG(D_tls) debug_printf("Calling SSL_accept\n");
@@ -723,6 +733,7 @@ receive_getc = tls_getc;
 receive_ungetc = tls_ungetc;
 receive_feof = tls_feof;
 receive_ferror = tls_ferror;
+receive_smtp_buffered = tls_smtp_buffered;
 
 tls_active = fileno(smtp_out);
 return OK;
@@ -741,12 +752,19 @@ return OK;
 Argument:
   fd               the fd of the connection
   host             connected host (for messages)
+  addr             the first address
   dhparam          DH parameter file
   certificate      certificate file
   privatekey       private key file
   verify_certs     file for certificate verify
   crl              file containing CRL
   require_ciphers  list of allowed ciphers
+  ------------------------------------------------------
+  require_mac      list of allowed MACs                 ) Not used
+  require_kx       list of allowed key_exchange methods )   for
+  require_proto    list of allowed protocols            ) OpenSSL
+  ------------------------------------------------------
+  timeout          startup timeout
 
 Returns:           OK on success
                    FAIL otherwise - note that tls_error() will not give DEFER
@@ -756,7 +774,8 @@ Returns:           OK on success
 int
 tls_client_start(int fd, host_item *host, address_item *addr, uschar *dhparam,
   uschar *certificate, uschar *privatekey, uschar *verify_certs, uschar *crl,
-  uschar *require_ciphers, int timeout)
+  uschar *require_ciphers, uschar *require_mac, uschar *require_kx,
+  uschar *require_proto, int timeout)
 {
 static uschar txt[256];
 uschar *expciphers;
@@ -868,6 +887,7 @@ if (ssl_xfer_buffer_lwm >= ssl_xfer_buffer_hwm)
     receive_ungetc = smtp_ungetc;
     receive_feof = smtp_feof;
     receive_ferror = smtp_ferror;
+    receive_smtp_buffered = smtp_buffered;
 
     SSL_free(ssl);
     ssl = NULL;