66 lines
2.4 KiB
Diff
66 lines
2.4 KiB
Diff
From 59786b186d4de8fd6cd5aeebedbce2362a849566 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Josef=20=C4=8Cejka?= <jcejka@suse.cz>
|
|
Date: Tue, 6 Feb 2024 15:14:29 +0100
|
|
Subject: [PATCH] Always add extension indicators to kex_algorithms
|
|
|
|
KEX pseudo-methods "ext-info-c" and "kex-strict-c-v00@openssh.com"
|
|
are in default kex method list but they were lost
|
|
after configuring custom kex method list in libssh2_session_method_pref().
|
|
---
|
|
src/kex.c | 19 +++++++++++++++++++
|
|
1 file changed, 19 insertions(+)
|
|
|
|
diff --git a/src/kex.c b/src/kex.c
|
|
index 8c65a0fe..1d1dadfa 100644
|
|
--- a/src/kex.c
|
|
+++ b/src/kex.c
|
|
@@ -4027,13 +4027,25 @@ libssh2_session_method_pref(LIBSSH2_SESSION * session, int method_type,
|
|
const char *prefs)
|
|
{
|
|
char **prefvar, *s, *newprefs;
|
|
+ char *tmpprefs = NULL;
|
|
size_t prefs_len = strlen(prefs);
|
|
const LIBSSH2_COMMON_METHOD **mlist;
|
|
+ const char *kex_extensions = "ext-info-c,kex-strict-c-v00@openssh.com,";
|
|
+ size_t kex_extensions_len = strlen(kex_extensions);
|
|
|
|
switch(method_type) {
|
|
case LIBSSH2_METHOD_KEX:
|
|
prefvar = &session->kex_prefs;
|
|
mlist = (const LIBSSH2_COMMON_METHOD **)libssh2_kex_methods;
|
|
+ tmpprefs = LIBSSH2_ALLOC(session, kex_extensions_len + prefs_len + 1);
|
|
+ if(!tmpprefs) {
|
|
+ return _libssh2_error(session, LIBSSH2_ERROR_ALLOC,
|
|
+ "Error allocated space for kex method preferences");
|
|
+ }
|
|
+ memcpy(tmpprefs, kex_extensions, kex_extensions_len);
|
|
+ memcpy(tmpprefs + kex_extensions_len, prefs, prefs_len + 1);
|
|
+ prefs = tmpprefs;
|
|
+ prefs_len = strlen(prefs);
|
|
break;
|
|
|
|
case LIBSSH2_METHOD_HOSTKEY:
|
|
@@ -4093,6 +4105,9 @@ libssh2_session_method_pref(LIBSSH2_SESSION * session, int method_type,
|
|
|
|
s = newprefs = LIBSSH2_ALLOC(session, prefs_len + 1);
|
|
if(!newprefs) {
|
|
+ if (tmpprefs) {
|
|
+ LIBSSH2_FREE(session, tmpprefs);
|
|
+ }
|
|
return _libssh2_error(session, LIBSSH2_ERROR_ALLOC,
|
|
"Error allocated space for method preferences");
|
|
}
|
|
@@ -4121,6 +4136,10 @@ libssh2_session_method_pref(LIBSSH2_SESSION * session, int method_type,
|
|
}
|
|
}
|
|
|
|
+ if (tmpprefs) {
|
|
+ LIBSSH2_FREE(session, tmpprefs);
|
|
+ }
|
|
+
|
|
if(!*newprefs) {
|
|
LIBSSH2_FREE(session, newprefs);
|
|
return _libssh2_error(session, LIBSSH2_ERROR_METHOD_NOT_SUPPORTED,
|
|
--
|
|
2.26.2
|