Fix crash after TLS channel shutdown

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

diff --git a/src/src/tls-openssl.c b/src/src/tls-openssl.c
index 39e7fc8f4946f52245cfa86f4367324d0eeb8297..e219f5cc15f19a56f1864d1c6ef44ade8116c36b 100644 (file)
--- a/src/src/tls-openssl.c
+++ b/src/src/tls-openssl.c
@@ -1715,17 +1715,17 @@ if(!p)
   return cbinfo->u_ocsp.client.verify_required ? 0 : 1;
  }
 
-if(!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len)))
- {
-  tls_out.ocsp = OCSP_FAILED;
+if (!(rsp = d2i_OCSP_RESPONSE(NULL, &p, len)))
+  {
+  tls_out.ocsp = OCSP_FAILED;  /*XXX should use tlsp-> to permit concurrent outbound */
   if (LOGGING(tls_cipher))
     log_write(0, LOG_MAIN, "Received TLS cert status response, parse error");
   else
     DEBUG(D_tls) debug_printf(" parse error\n");
   return 0;
- }
+  }
 
-if(!(bs = OCSP_response_get1_basic(rsp)))
+if (!(bs = OCSP_response_get1_basic(rsp)))
   {
   tls_out.ocsp = OCSP_FAILED;
   if (LOGGING(tls_cipher))
@@ -2739,12 +2739,14 @@ if (tlsp->host_resumable)
          debug_printf("decoding session: %s\n", ssl_errstring);
          }
        }
+#ifdef EXIM_HAVE_SESSION_TICKET
       else if ( SSL_SESSION_get_ticket_lifetime_hint(ss) + dt->time_stamp
               < time(NULL))
        {
        DEBUG(D_tls) debug_printf("session expired\n");
        dbfn_delete(dbm_file, key);
        }
+#endif
       else if (!SSL_set_session(ssl, ss))
        {
        DEBUG(D_tls)
@@ -2759,6 +2761,7 @@ if (tlsp->host_resumable)
        DEBUG(D_tls) debug_printf("good session\n");
        tlsp->resumption |= RESUME_CLIENT_SUGGESTED;
        tlsp->verify_override = dt->verify_override;
+       tlsp->ocsp = dt->ocsp;
        }
       }
     else
@@ -2787,7 +2790,7 @@ if (SSL_SESSION_is_resumable(ss))         /* 1.1.1 */
   {
   int len = i2d_SSL_SESSION(ss, NULL);
   int dlen = sizeof(dbdata_tls_session) + len;
-  dbdata_tls_session * dt = store_get(dlen);
+  dbdata_tls_session * dt = store_get(dlen, TRUE);
   uschar * s = dt->session;
   open_db dbblock, * dbm_file;
 
@@ -2795,6 +2798,7 @@ if (SSL_SESSION_is_resumable(ss))         /* 1.1.1 */
   tlsp->resumption |= RESUME_SERVER_TICKET;    /* server gave us a ticket */
 
   dt->verify_override = tlsp->verify_override;
+  dt->ocsp = tlsp->ocsp;
   (void) i2d_SSL_SESSION(ss, &s);              /* s gets bumped to end */
 
   if ((dbm_file = dbfn_open(US"tls", O_RDWR, &dbblock, FALSE, FALSE)))
@@ -2904,7 +2908,7 @@ BOOL require_ocsp = FALSE;
 
 rc = store_pool;
 store_pool = POOL_PERM;
-exim_client_ctx = store_get(sizeof(exim_openssl_client_tls_ctx));
+exim_client_ctx = store_get(sizeof(exim_openssl_client_tls_ctx), FALSE);
 exim_client_ctx->corked = NULL;
 store_pool = rc;
 
@@ -3024,12 +3028,6 @@ if (!(exim_client_ctx->ssl = SSL_new(exim_client_ctx->ctx)))
   }
 SSL_set_session_id_context(exim_client_ctx->ssl, sid_ctx, Ustrlen(sid_ctx));
 
-#ifdef EXPERIMENTAL_TLS_RESUME
-if (!tls_client_ssl_resume_prehandshake(exim_client_ctx->ssl, tlsp, host,
-      errstr))
-  return FALSE;
-#endif
-
 SSL_set_fd(exim_client_ctx->ssl, cctx->sock);
 SSL_set_connect_state(exim_client_ctx->ssl);
 
@@ -3089,6 +3087,12 @@ if (request_ocsp)
   }
 #endif
 
+#ifdef EXPERIMENTAL_TLS_RESUME
+if (!tls_client_ssl_resume_prehandshake(exim_client_ctx->ssl, tlsp, host,
+      errstr))
+  return FALSE;
+#endif
+
 #ifndef DISABLE_EVENT
 client_static_cbinfo->event_action = tb ? tb->event_action : NULL;
 #endif
@@ -3185,32 +3189,10 @@ switch(error)
   case SSL_ERROR_ZERO_RETURN:
     DEBUG(D_tls) debug_printf("Got SSL_ERROR_ZERO_RETURN\n");
 
-    receive_getc = smtp_getc;
-    receive_getbuf = smtp_getbuf;
-    receive_get_cache = smtp_get_cache;
-    receive_ungetc = smtp_ungetc;
-    receive_feof = smtp_feof;
-    receive_ferror = smtp_ferror;
-    receive_smtp_buffered = smtp_buffered;
-
     if (SSL_get_shutdown(server_ssl) == SSL_RECEIVED_SHUTDOWN)
          SSL_shutdown(server_ssl);
 
-#ifndef DISABLE_OCSP
-    sk_X509_pop_free(server_static_cbinfo->verify_stack, X509_free);
-    server_static_cbinfo->verify_stack = NULL;
-#endif
-    SSL_free(server_ssl);
-    SSL_CTX_free(server_ctx);
-    server_ctx = NULL;
-    server_ssl = NULL;
-    tls_in.active.sock = -1;
-    tls_in.active.tls_ctx = NULL;
-    tls_in.bits = 0;
-    tls_in.cipher = NULL;
-    tls_in.peerdn = NULL;
-    tls_in.sni = NULL;
-
+    tls_close(NULL, TLS_NO_SHUTDOWN);
     return FALSE;
 
   /* Handle genuine errors */
@@ -3391,14 +3373,14 @@ a store reset there, so use POOL_PERM. */
 
 if ((more || corked))
   {
-#ifdef EXPERIMENTAL_PIPE_CONNECT
+#ifdef SUPPORT_PIPE_CONNECT
   int save_pool = store_pool;
   store_pool = POOL_PERM;
 #endif
 
   corked = string_catn(corked, buff, len);
 
-#ifdef EXPERIMENTAL_PIPE_CONNECT
+#ifdef SUPPORT_PIPE_CONNECT
   store_pool = save_pool;
 #endif
 
@@ -3499,14 +3481,25 @@ if (shutdown)
     }
   }
 
-#ifndef DISABLE_OCSP
 if (!o_ctx)            /* server side */
   {
+#ifndef DISABLE_OCSP
   sk_X509_pop_free(server_static_cbinfo->verify_stack, X509_free);
   server_static_cbinfo->verify_stack = NULL;
-  }
 #endif
 
+  receive_getc =       smtp_getc;
+  receive_getbuf =     smtp_getbuf;
+  receive_get_cache =  smtp_get_cache;
+  receive_ungetc =     smtp_ungetc;
+  receive_feof =       smtp_feof;
+  receive_ferror =     smtp_ferror;
+  receive_smtp_buffered = smtp_buffered;
+  tls_in.active.tls_ctx = NULL;
+  tls_in.sni = NULL;
+  /* Leave bits, peercert, cipher, peerdn, certificate_verified set, for logging */
+  }
+
 SSL_CTX_free(*ctxp);
 SSL_free(*sslp);
 *ctxp = NULL;