* Exim - an Internet mail transport agent *
*************************************************/
+/* Copyright (c) The Exim Maintainers 2020 - 2024 */
/* Copyright (c) University of Cambridge 1995 - 2018 */
-/* Copyright (c) The Exim Maintainers 2020 */
/* See the file NOTICE for conditions of use and distribution. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "../exim.h"
uschar * clear, * end;
int len;
- if ((len = b64decode(data, &clear)) < 0) return BAD64;
+ if ((len = b64decode(data, &clear, GET_TAINTED)) < 0) return BAD64;
DEBUG(D_auth) debug_printf("auth input decode:");
for (end = clear + len; clear < end && expand_nmax < EXPAND_MAXN; )
{
Returns: OK on success
BAD64 if response too large for buffer
CANCELLED if response is "*"
+
+NOTE: the data came from the wire so should be tainted - but
+big_buffer is not taint-tracked. EVERY CALLER needs to apply
+tainting.
*/
int
{
int c;
int p = 0;
-smtp_printf("334 %s\r\n", FALSE, b64encode(challenge, challen));
+smtp_printf("334 %s\r\n", SP_NO_MORE, b64encode(challenge, challen));
while ((c = receive_getc(GETC_BUFFER_UNLIMITED)) != '\n' && c != EOF)
{
if (p >= big_buffer_size - 1) return BAD64;
if ((rc = auth_get_data(&resp, challenge, Ustrlen(challenge))) != OK)
return rc;
-if ((len = b64decode(resp, &clear)) < 0)
+if ((len = b64decode(resp, &clear, GET_TAINTED)) < 0)
return BAD64;
end = clear + len;
/* Now that we know we'll continue, we put the received data into $auth<n>,
if possible. First, decode it: buffer+4 skips over the SMTP status code. */
-clear_len = b64decode(buffer+4, &clear);
+clear_len = b64decode(buffer+4, &clear, buffer+4);
/* If decoding failed, the default is to terminate the authentication, and
return FAIL, with the SMTP response still in the buffer. However, if client_