From 007b56943bbec3c3b9b28be08c3088b0d28ba2d8 Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@samba.org>
Date: Tue, 12 Nov 2019 16:56:45 +0100
Subject: [PATCH 199/208] s3:rpc_server: Allow RC4 encrypted buffers in
 samr_SetUserInfo()

This is only allowed if we have a sealed connections!

Signed-off-by: Andreas Schneider <asn@samba.org>
---
 source3/rpc_server/samr/srv_samr_nt.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/source3/rpc_server/samr/srv_samr_nt.c b/source3/rpc_server/samr/srv_samr_nt.c
index 91771e34502..509bce57a3b 100644
--- a/source3/rpc_server/samr/srv_samr_nt.c
+++ b/source3/rpc_server/samr/srv_samr_nt.c
@@ -5210,9 +5210,15 @@ NTSTATUS _samr_SetUserInfo(struct pipes_struct *p,
 			if(!NT_STATUS_IS_OK(status)) {
 				break;
 			}
+			/*
+			 * This can be allowed as it requires a session key
+			 * which we only have if we have a SMB session.
+			 */
+			GNUTLS_FIPS140_SET_LAX_MODE();
 			status = arc4_decrypt_data(session_key,
 						   info->info23.password.data,
 						   516);
+			GNUTLS_FIPS140_SET_STRICT_MODE();
 			if(!NT_STATUS_IS_OK(status)) {
 				break;
 			}
@@ -5233,9 +5239,15 @@ NTSTATUS _samr_SetUserInfo(struct pipes_struct *p,
 			if(!NT_STATUS_IS_OK(status)) {
 				break;
 			}
+			/*
+			 * This can be allowed as it requires a session key
+			 * which we only have if we have a SMB session.
+			 */
+			GNUTLS_FIPS140_SET_LAX_MODE();
 			status = arc4_decrypt_data(session_key,
 						   info->info24.password.data,
 						   516);
+			GNUTLS_FIPS140_SET_STRICT_MODE();
 			if(!NT_STATUS_IS_OK(status)) {
 				break;
 			}
@@ -5254,8 +5266,14 @@ NTSTATUS _samr_SetUserInfo(struct pipes_struct *p,
 			if(!NT_STATUS_IS_OK(status)) {
 				break;
 			}
+			/*
+			 * This can be allowed as it requires a session key
+			 * which we only have if we have a SMB session.
+			 */
+			GNUTLS_FIPS140_SET_LAX_MODE();
 			status = decode_rc4_passwd_buffer(&session_key,
 					&info->info25.password);
+			GNUTLS_FIPS140_SET_STRICT_MODE();
 			if (!NT_STATUS_IS_OK(status)) {
 				break;
 			}
@@ -5274,8 +5292,14 @@ NTSTATUS _samr_SetUserInfo(struct pipes_struct *p,
 			if(!NT_STATUS_IS_OK(status)) {
 				break;
 			}
+			/*
+			 * This can be allowed as it requires a session key
+			 * which we only have if we have a SMB session.
+			 */
+			GNUTLS_FIPS140_SET_LAX_MODE();
 			status = decode_rc4_passwd_buffer(&session_key,
 					&info->info26.password);
+			GNUTLS_FIPS140_SET_STRICT_MODE();
 			if (!NT_STATUS_IS_OK(status)) {
 				break;
 			}
-- 
2.23.0