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authorVolker Lendecke <vl@samba.org>2008-09-12 23:05:51 +0200
committerVolker Lendecke <vl@samba.org>2008-09-12 23:09:17 +0200
commitffbc38abe116fb6edc1739c6440207edc8230de9 (patch)
tree330ad3ef22264bfaf7698747d59d3cffc1f123ad /source3/libsmb
parentced409b5f754623652580b708943ead6d98adb6d (diff)
downloadsamba-ffbc38abe116fb6edc1739c6440207edc8230de9.tar.gz
samba-ffbc38abe116fb6edc1739c6440207edc8230de9.tar.bz2
samba-ffbc38abe116fb6edc1739c6440207edc8230de9.zip
Factor out validate_smb_crypto
(This used to be commit 37fcc9dc462dfb006fdac294e49c0dae7588c103)
Diffstat (limited to 'source3/libsmb')
-rw-r--r--source3/libsmb/async_smb.c94
1 files changed, 53 insertions, 41 deletions
diff --git a/source3/libsmb/async_smb.c b/source3/libsmb/async_smb.c
index c8d010a3fe..d5eac07b48 100644
--- a/source3/libsmb/async_smb.c
+++ b/source3/libsmb/async_smb.c
@@ -690,6 +690,57 @@ NTSTATUS cli_pull_reply(struct async_req *req,
}
/**
+ * Decrypt a PDU, check the signature
+ * @param[in] cli The cli_state that received something
+ * @param[in] pdu The incoming bytes
+ * @retval error code
+ */
+
+
+static NTSTATUS validate_smb_crypto(struct cli_state *cli, char *pdu)
+{
+ NTSTATUS status;
+
+ if ((IVAL(pdu, 4) != 0x424d53ff) /* 0xFF"SMB" */
+ && (SVAL(pdu, 4) != 0x45ff)) /* 0xFF"E" */ {
+ DEBUG(10, ("Got non-SMB PDU\n"));
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
+
+ if (cli_encryption_on(cli) && CVAL(pdu, 0) == 0) {
+ uint16_t enc_ctx_num;
+
+ status = get_enc_ctx_num((uint8_t *)pdu, &enc_ctx_num);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("get_enc_ctx_num returned %s\n",
+ nt_errstr(status)));
+ return status;
+ }
+
+ if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
+ DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
+ enc_ctx_num,
+ cli->trans_enc_state->enc_ctx_num));
+ return NT_STATUS_INVALID_HANDLE;
+ }
+
+ status = common_decrypt_buffer(cli->trans_enc_state, pdu);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("common_decrypt_buffer returned %s\n",
+ nt_errstr(status)));
+ return status;
+ }
+ }
+
+ if (!cli_check_sign_mac(cli, pdu)) {
+ DEBUG(10, ("cli_check_sign_mac failed\n"));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ return NT_STATUS_OK;
+}
+
+/**
* A PDU has arrived on cli->evt_inbuf
* @param[in] cli The cli_state that received something
*/
@@ -758,47 +809,8 @@ static void handle_incoming_pdu(struct cli_state *cli)
}
}
- if ((IVAL(pdu, 4) != 0x424d53ff) /* 0xFF"SMB" */
- && (SVAL(pdu, 4) != 0x45ff)) /* 0xFF"E" */ {
- DEBUG(10, ("Got non-SMB PDU\n"));
- status = NT_STATUS_INVALID_NETWORK_RESPONSE;
- goto invalidate_requests;
- }
-
- /*
- * TODO: Handle oplock break requests
- */
-
- if (cli_encryption_on(cli) && CVAL(pdu, 0) == 0) {
- uint16_t enc_ctx_num;
-
- status = get_enc_ctx_num((uint8_t *)pdu, &enc_ctx_num);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("get_enc_ctx_num returned %s\n",
- nt_errstr(status)));
- goto invalidate_requests;
- }
-
- if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
- DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
- enc_ctx_num,
- cli->trans_enc_state->enc_ctx_num));
- status = NT_STATUS_INVALID_HANDLE;
- goto invalidate_requests;
- }
-
- status = common_decrypt_buffer(cli->trans_enc_state,
- pdu);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("common_decrypt_buffer returned %s\n",
- nt_errstr(status)));
- goto invalidate_requests;
- }
- }
-
- if (!cli_check_sign_mac(cli, pdu)) {
- DEBUG(10, ("cli_check_sign_mac failed\n"));
- status = NT_STATUS_ACCESS_DENIED;
+ status = validate_smb_crypto(cli, pdu);
+ if (!NT_STATUS_IS_OK(status)) {
goto invalidate_requests;
}