-/*
+/*
* Unix SMB/CIFS implementation.
* Version 3.0
* NTLMSSP Signing routines
* Copyright (C) Luke Kenneth Casson Leighton 1996-2001
* Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2005
- *
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
- *
+ *
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
+ *
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "auth/ntlmssp/ntlmssp.h"
-#include "../libcli/auth/libcli_auth.h"
-#include "../lib/crypto/crypto.h"
#include "auth/gensec/gensec.h"
+#include "../libcli/auth/ntlmssp_private.h"
-#define CLI_SIGN "session key to client-to-server signing key magic constant"
-#define CLI_SEAL "session key to client-to-server sealing key magic constant"
-#define SRV_SIGN "session key to server-to-client signing key magic constant"
-#define SRV_SEAL "session key to server-to-client sealing key magic constant"
-
-/**
- * Some notes on the NTLM2 code:
- *
- * NTLM2 is a AEAD system. This means that the data encrypted is not
- * all the data that is signed. In DCE-RPC case, the headers of the
- * DCE-RPC packets are also signed. This prevents some of the
- * fun-and-games one might have by changing them.
- *
- */
-
-static void calc_ntlmv2_key(TALLOC_CTX *mem_ctx,
- DATA_BLOB *subkey,
- DATA_BLOB session_key,
- const char *constant)
-{
- struct MD5Context ctx3;
- *subkey = data_blob_talloc(mem_ctx, NULL, 16);
- MD5Init(&ctx3);
- MD5Update(&ctx3, session_key.data, session_key.length);
- MD5Update(&ctx3, (const uint8_t *)constant, strlen(constant)+1);
- MD5Final(subkey->data, &ctx3);
-}
-
-enum ntlmssp_direction {
- NTLMSSP_SEND,
- NTLMSSP_RECEIVE
-};
-
-static NTSTATUS ntlmssp_make_packet_signature(struct gensec_ntlmssp_state *gensec_ntlmssp_state,
- TALLOC_CTX *sig_mem_ctx,
- const uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- enum ntlmssp_direction direction,
- DATA_BLOB *sig, bool encrypt_sig)
-{
- if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
-
- HMACMD5Context ctx;
- uint8_t digest[16];
- uint8_t seq_num[4];
-
- *sig = data_blob_talloc(sig_mem_ctx, NULL, NTLMSSP_SIG_SIZE);
- if (!sig->data) {
- return NT_STATUS_NO_MEMORY;
- }
-
- switch (direction) {
- case NTLMSSP_SEND:
- SIVAL(seq_num, 0, gensec_ntlmssp_state->crypt.ntlm2.send_seq_num);
- gensec_ntlmssp_state->crypt.ntlm2.send_seq_num++;
- hmac_md5_init_limK_to_64(gensec_ntlmssp_state->crypt.ntlm2.send_sign_key.data,
- gensec_ntlmssp_state->crypt.ntlm2.send_sign_key.length, &ctx);
- break;
- case NTLMSSP_RECEIVE:
- SIVAL(seq_num, 0, gensec_ntlmssp_state->crypt.ntlm2.recv_seq_num);
- gensec_ntlmssp_state->crypt.ntlm2.recv_seq_num++;
- hmac_md5_init_limK_to_64(gensec_ntlmssp_state->crypt.ntlm2.recv_sign_key.data,
- gensec_ntlmssp_state->crypt.ntlm2.recv_sign_key.length, &ctx);
- break;
- }
- hmac_md5_update(seq_num, sizeof(seq_num), &ctx);
- hmac_md5_update(whole_pdu, pdu_length, &ctx);
- hmac_md5_final(digest, &ctx);
-
- if (encrypt_sig && gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
- switch (direction) {
- case NTLMSSP_SEND:
- arcfour_crypt_sbox(gensec_ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state, digest, 8);
- break;
- case NTLMSSP_RECEIVE:
- arcfour_crypt_sbox(gensec_ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state, digest, 8);
- break;
- }
- }
-
- SIVAL(sig->data, 0, NTLMSSP_SIGN_VERSION);
- memcpy(sig->data + 4, digest, 8);
- memcpy(sig->data + 12, seq_num, 4);
-
- DEBUG(10, ("NTLM2: created signature over %llu bytes of input:\n", (unsigned long long)pdu_length));
- dump_data(11, sig->data, sig->length);
-
- } else {
- uint32_t crc;
- crc = crc32_calc_buffer(data, length);
- if (!msrpc_gen(sig_mem_ctx,
- sig, "dddd", NTLMSSP_SIGN_VERSION, 0, crc, gensec_ntlmssp_state->crypt.ntlm.seq_num)) {
- return NT_STATUS_NO_MEMORY;
- }
- gensec_ntlmssp_state->crypt.ntlm.seq_num++;
-
- arcfour_crypt_sbox(gensec_ntlmssp_state->crypt.ntlm.arcfour_state, sig->data+4, sig->length-4);
-
- DEBUG(10, ("NTLM1: created signature over %llu bytes of input:\n", (unsigned long long)length));
- dump_data(11, sig->data, sig->length);
- }
- return NT_STATUS_OK;
-}
-
-/* TODO: make this non-public */
-NTSTATUS gensec_ntlmssp_sign_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *sig_mem_ctx,
- const uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
+NTSTATUS gensec_ntlmssp_sign_packet(struct gensec_security *gensec_security,
+ TALLOC_CTX *sig_mem_ctx,
+ const uint8_t *data, size_t length,
+ const uint8_t *whole_pdu, size_t pdu_length,
DATA_BLOB *sig)
{
struct gensec_ntlmssp_context *gensec_ntlmssp =
talloc_get_type_abort(gensec_security->private_data,
struct gensec_ntlmssp_context);
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
+ NTSTATUS nt_status;
- return ntlmssp_make_packet_signature(gensec_ntlmssp_state, sig_mem_ctx,
- data, length,
- whole_pdu, pdu_length,
- NTLMSSP_SEND, sig, true);
-}
+ nt_status = ntlmssp_sign_packet(gensec_ntlmssp->ntlmssp_state,
+ sig_mem_ctx,
+ data, length,
+ whole_pdu, pdu_length,
+ sig);
-/**
- * Check the signature of an incoming packet
- *
- */
+ return nt_status;
+}
-NTSTATUS gensec_ntlmssp_check_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *sig_mem_ctx,
- const uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
+NTSTATUS gensec_ntlmssp_check_packet(struct gensec_security *gensec_security,
+ const uint8_t *data, size_t length,
+ const uint8_t *whole_pdu, size_t pdu_length,
const DATA_BLOB *sig)
{
struct gensec_ntlmssp_context *gensec_ntlmssp =
talloc_get_type_abort(gensec_security->private_data,
struct gensec_ntlmssp_context);
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
-
- DATA_BLOB local_sig;
NTSTATUS nt_status;
- if (!gensec_ntlmssp_state->session_key.length) {
- DEBUG(3, ("NO session key, cannot check packet signature\n"));
- return NT_STATUS_NO_USER_SESSION_KEY;
- }
-
- nt_status = ntlmssp_make_packet_signature(gensec_ntlmssp_state, sig_mem_ctx,
- data, length,
- whole_pdu, pdu_length,
- NTLMSSP_RECEIVE, &local_sig, true);
-
- if (!NT_STATUS_IS_OK(nt_status)) {
- DEBUG(0, ("NTLMSSP packet sig creation failed with %s\n", nt_errstr(nt_status)));
- return nt_status;
- }
-
- if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
- if (local_sig.length != sig->length ||
- memcmp(local_sig.data,
- sig->data, sig->length) != 0) {
-
- DEBUG(10, ("BAD SIG NTLM2: wanted signature over %llu bytes of input:\n", (unsigned long long)pdu_length));
- dump_data(10, local_sig.data, local_sig.length);
-
- DEBUG(10, ("BAD SIG: got signature over %llu bytes of input:\n", (unsigned long long)pdu_length));
- dump_data(10, sig->data, sig->length);
-
- return NT_STATUS_ACCESS_DENIED;
- }
- } else {
- if (local_sig.length != sig->length ||
- memcmp(local_sig.data + 8,
- sig->data + 8, sig->length - 8) != 0) {
- DEBUG(10, ("BAD SIG NTLM1: wanted signature of %llu bytes of input:\n", (unsigned long long)length));
- dump_data(5, local_sig.data, local_sig.length);
-
- DEBUG(10, ("BAD SIG: got signature of %llu bytes of input:\n", (unsigned long long)length));
- dump_data(10, sig->data, sig->length);
-
- return NT_STATUS_ACCESS_DENIED;
- }
- }
- dump_data_pw("checked ntlmssp signature\n", sig->data, sig->length);
+ nt_status = ntlmssp_check_packet(gensec_ntlmssp->ntlmssp_state,
+ data, length,
+ whole_pdu, pdu_length,
+ sig);
- return NT_STATUS_OK;
+ return nt_status;
}
-
-/**
- * Seal data with the NTLMSSP algorithm
- *
- */
-
-NTSTATUS gensec_ntlmssp_seal_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *sig_mem_ctx,
- uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
+NTSTATUS gensec_ntlmssp_seal_packet(struct gensec_security *gensec_security,
+ TALLOC_CTX *sig_mem_ctx,
+ uint8_t *data, size_t length,
+ const uint8_t *whole_pdu, size_t pdu_length,
DATA_BLOB *sig)
{
struct gensec_ntlmssp_context *gensec_ntlmssp =
talloc_get_type_abort(gensec_security->private_data,
struct gensec_ntlmssp_context);
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
NTSTATUS nt_status;
- if (!gensec_ntlmssp_state->session_key.length) {
- DEBUG(3, ("NO session key, cannot seal packet\n"));
- return NT_STATUS_NO_USER_SESSION_KEY;
- }
-
- DEBUG(10,("ntlmssp_seal_data: seal\n"));
- dump_data_pw("ntlmssp clear data\n", data, length);
- if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
- /* The order of these two operations matters - we must first seal the packet,
- then seal the sequence number - this is because the send_seal_hash is not
- constant, but is is rather updated with each iteration */
- nt_status = ntlmssp_make_packet_signature(gensec_ntlmssp_state, sig_mem_ctx,
- data, length,
- whole_pdu, pdu_length,
- NTLMSSP_SEND, sig, false);
- arcfour_crypt_sbox(gensec_ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state, data, length);
- if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
- arcfour_crypt_sbox(gensec_ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state, sig->data+4, 8);
- }
- } else {
- uint32_t crc;
- crc = crc32_calc_buffer(data, length);
- if (!msrpc_gen(sig_mem_ctx,
- sig, "dddd", NTLMSSP_SIGN_VERSION, 0, crc, gensec_ntlmssp_state->crypt.ntlm.seq_num)) {
- return NT_STATUS_NO_MEMORY;
- }
-
- /* The order of these two operations matters - we must
- first seal the packet, then seal the sequence
- number - this is because the ntlmssp_hash is not
- constant, but is is rather updated with each
- iteration */
-
- arcfour_crypt_sbox(gensec_ntlmssp_state->crypt.ntlm.arcfour_state, data, length);
- arcfour_crypt_sbox(gensec_ntlmssp_state->crypt.ntlm.arcfour_state, sig->data+4, sig->length-4);
- /* increment counter on send */
- gensec_ntlmssp_state->crypt.ntlm.seq_num++;
- nt_status = NT_STATUS_OK;
- }
- dump_data_pw("ntlmssp signature\n", sig->data, sig->length);
- dump_data_pw("ntlmssp sealed data\n", data, length);
+ nt_status = ntlmssp_seal_packet(gensec_ntlmssp->ntlmssp_state,
+ sig_mem_ctx,
+ data, length,
+ whole_pdu, pdu_length,
+ sig);
return nt_status;
}
-/**
- * Unseal data with the NTLMSSP algorithm
- *
- */
-
/*
wrappers for the ntlmssp_*() functions
*/
-NTSTATUS gensec_ntlmssp_unseal_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *sig_mem_ctx,
- uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
+NTSTATUS gensec_ntlmssp_unseal_packet(struct gensec_security *gensec_security,
+ uint8_t *data, size_t length,
+ const uint8_t *whole_pdu, size_t pdu_length,
const DATA_BLOB *sig)
{
- NTSTATUS status;
struct gensec_ntlmssp_context *gensec_ntlmssp =
talloc_get_type_abort(gensec_security->private_data,
struct gensec_ntlmssp_context);
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
- if (!gensec_ntlmssp_state->session_key.length) {
- DEBUG(3, ("NO session key, cannot unseal packet\n"));
- return NT_STATUS_NO_USER_SESSION_KEY;
- }
-
- dump_data_pw("ntlmssp sealed data\n", data, length);
- if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
- arcfour_crypt_sbox(gensec_ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state, data, length);
- } else {
- arcfour_crypt_sbox(gensec_ntlmssp_state->crypt.ntlm.arcfour_state, data, length);
- }
- dump_data_pw("ntlmssp clear data\n", data, length);
- status = gensec_ntlmssp_check_packet(gensec_security, sig_mem_ctx, data, length, whole_pdu, pdu_length, sig);
-
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("NTLMSSP packet check for unseal failed due to invalid signature on %llu bytes of input:\n", (unsigned long long)length));
- }
- return status;
-}
-
-/**
- Initialise the state for NTLMSSP signing.
-*/
-/* TODO: make this non-public */
-NTSTATUS ntlmssp_sign_init(struct gensec_ntlmssp_state *gensec_ntlmssp_state)
-{
- TALLOC_CTX *mem_ctx = talloc_new(gensec_ntlmssp_state);
-
- if (!mem_ctx) {
- return NT_STATUS_NO_MEMORY;
- }
-
- DEBUG(3, ("NTLMSSP Sign/Seal - Initialising with flags:\n"));
- debug_ntlmssp_flags(gensec_ntlmssp_state->neg_flags);
-
- if (gensec_ntlmssp_state->session_key.length < 8) {
- talloc_free(mem_ctx);
- DEBUG(3, ("NO session key, cannot intialise signing\n"));
- return NT_STATUS_NO_USER_SESSION_KEY;
- }
-
- if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2)
- {
- DATA_BLOB weak_session_key = gensec_ntlmssp_state->session_key;
- const char *send_sign_const;
- const char *send_seal_const;
- const char *recv_sign_const;
- const char *recv_seal_const;
-
- DATA_BLOB send_seal_key;
- DATA_BLOB recv_seal_key;
-
- switch (gensec_ntlmssp_state->role) {
- case NTLMSSP_CLIENT:
- send_sign_const = CLI_SIGN;
- send_seal_const = CLI_SEAL;
- recv_sign_const = SRV_SIGN;
- recv_seal_const = SRV_SEAL;
- break;
- case NTLMSSP_SERVER:
- send_sign_const = SRV_SIGN;
- send_seal_const = SRV_SEAL;
- recv_sign_const = CLI_SIGN;
- recv_seal_const = CLI_SEAL;
- break;
- default:
- talloc_free(mem_ctx);
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- gensec_ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state = talloc(gensec_ntlmssp_state, struct arcfour_state);
- NT_STATUS_HAVE_NO_MEMORY(gensec_ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state);
- gensec_ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state = talloc(gensec_ntlmssp_state, struct arcfour_state);
- NT_STATUS_HAVE_NO_MEMORY(gensec_ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state);
-
- /**
- Weaken NTLMSSP keys to cope with down-level
- clients, servers and export restrictions.
-
- We probably should have some parameters to control
- this, once we get NTLM2 working.
- */
-
- /* Key weakening was not performed on the master key
- * for NTLM2 (in ntlmssp_weaken_keys()), but must be
- * done on the encryption subkeys only. That is why
- * we don't have this code for the ntlmv1 case.
- */
-
- if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_128) {
-
- } else if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_56) {
- weak_session_key.length = 7;
- } else { /* forty bits */
- weak_session_key.length = 5;
- }
- dump_data_pw("NTLMSSP weakend master key:\n",
- weak_session_key.data,
- weak_session_key.length);
-
- /* SEND: sign key */
- calc_ntlmv2_key(gensec_ntlmssp_state,
- &gensec_ntlmssp_state->crypt.ntlm2.send_sign_key,
- gensec_ntlmssp_state->session_key, send_sign_const);
- dump_data_pw("NTLMSSP send sign key:\n",
- gensec_ntlmssp_state->crypt.ntlm2.send_sign_key.data,
- gensec_ntlmssp_state->crypt.ntlm2.send_sign_key.length);
-
- /* SEND: seal ARCFOUR pad */
- calc_ntlmv2_key(mem_ctx,
- &send_seal_key,
- weak_session_key, send_seal_const);
- dump_data_pw("NTLMSSP send seal key:\n",
- send_seal_key.data,
- send_seal_key.length);
- arcfour_init(gensec_ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state,
- &send_seal_key);
- dump_data_pw("NTLMSSP send sesl hash:\n",
- gensec_ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state->sbox,
- sizeof(gensec_ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state->sbox));
-
- /* RECV: sign key */
- calc_ntlmv2_key(gensec_ntlmssp_state,
- &gensec_ntlmssp_state->crypt.ntlm2.recv_sign_key,
- gensec_ntlmssp_state->session_key, recv_sign_const);
- dump_data_pw("NTLMSSP recv sign key:\n",
- gensec_ntlmssp_state->crypt.ntlm2.recv_sign_key.data,
- gensec_ntlmssp_state->crypt.ntlm2.recv_sign_key.length);
-
- /* RECV: seal ARCFOUR pad */
- calc_ntlmv2_key(mem_ctx,
- &recv_seal_key,
- weak_session_key, recv_seal_const);
- dump_data_pw("NTLMSSP recv seal key:\n",
- recv_seal_key.data,
- recv_seal_key.length);
- arcfour_init(gensec_ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state,
- &recv_seal_key);
- dump_data_pw("NTLMSSP receive seal hash:\n",
- gensec_ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state->sbox,
- sizeof(gensec_ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state->sbox));
-
- gensec_ntlmssp_state->crypt.ntlm2.send_seq_num = 0;
- gensec_ntlmssp_state->crypt.ntlm2.recv_seq_num = 0;
-
- } else {
- DATA_BLOB weak_session_key = ntlmssp_weakend_key(gensec_ntlmssp_state, mem_ctx);
- DEBUG(5, ("NTLMSSP Sign/Seal - using NTLM1\n"));
-
- gensec_ntlmssp_state->crypt.ntlm.arcfour_state = talloc(gensec_ntlmssp_state, struct arcfour_state);
- NT_STATUS_HAVE_NO_MEMORY(gensec_ntlmssp_state->crypt.ntlm.arcfour_state);
-
- arcfour_init(gensec_ntlmssp_state->crypt.ntlm.arcfour_state,
- &weak_session_key);
- dump_data_pw("NTLMSSP hash:\n", gensec_ntlmssp_state->crypt.ntlm.arcfour_state->sbox,
- sizeof(gensec_ntlmssp_state->crypt.ntlm.arcfour_state->sbox));
+ NTSTATUS nt_status;
- gensec_ntlmssp_state->crypt.ntlm.seq_num = 0;
- }
+ nt_status = ntlmssp_unseal_packet(gensec_ntlmssp->ntlmssp_state,
+ data, length,
+ whole_pdu, pdu_length,
+ sig);
- talloc_free(mem_ctx);
- return NT_STATUS_OK;
+ return nt_status;
}
size_t gensec_ntlmssp_sig_size(struct gensec_security *gensec_security, size_t data_size)
}
NTSTATUS gensec_ntlmssp_wrap(struct gensec_security *gensec_security,
- TALLOC_CTX *sig_mem_ctx,
+ TALLOC_CTX *out_mem_ctx,
const DATA_BLOB *in,
DATA_BLOB *out)
{
- DATA_BLOB sig;
- NTSTATUS nt_status;
-
- if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
-
- *out = data_blob_talloc(sig_mem_ctx, NULL, in->length + NTLMSSP_SIG_SIZE);
- if (!out->data) {
- return NT_STATUS_NO_MEMORY;
- }
- memcpy(out->data + NTLMSSP_SIG_SIZE, in->data, in->length);
-
- nt_status = gensec_ntlmssp_seal_packet(gensec_security, sig_mem_ctx,
- out->data + NTLMSSP_SIG_SIZE,
- out->length - NTLMSSP_SIG_SIZE,
- out->data + NTLMSSP_SIG_SIZE,
- out->length - NTLMSSP_SIG_SIZE,
- &sig);
-
- if (NT_STATUS_IS_OK(nt_status)) {
- memcpy(out->data, sig.data, NTLMSSP_SIG_SIZE);
- }
- return nt_status;
-
- } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
-
- *out = data_blob_talloc(sig_mem_ctx, NULL, in->length + NTLMSSP_SIG_SIZE);
- if (!out->data) {
- return NT_STATUS_NO_MEMORY;
- }
- memcpy(out->data + NTLMSSP_SIG_SIZE, in->data, in->length);
-
- nt_status = gensec_ntlmssp_sign_packet(gensec_security, sig_mem_ctx,
- out->data + NTLMSSP_SIG_SIZE,
- out->length - NTLMSSP_SIG_SIZE,
- out->data + NTLMSSP_SIG_SIZE,
- out->length - NTLMSSP_SIG_SIZE,
- &sig);
-
- if (NT_STATUS_IS_OK(nt_status)) {
- memcpy(out->data, sig.data, NTLMSSP_SIG_SIZE);
- }
- return nt_status;
+ struct gensec_ntlmssp_context *gensec_ntlmssp =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gensec_ntlmssp_context);
- } else {
- *out = *in;
- return NT_STATUS_OK;
- }
+ return ntlmssp_wrap(gensec_ntlmssp->ntlmssp_state,
+ out_mem_ctx,
+ in, out);
}
NTSTATUS gensec_ntlmssp_unwrap(struct gensec_security *gensec_security,
- TALLOC_CTX *sig_mem_ctx,
+ TALLOC_CTX *out_mem_ctx,
const DATA_BLOB *in,
DATA_BLOB *out)
{
struct gensec_ntlmssp_context *gensec_ntlmssp =
talloc_get_type_abort(gensec_security->private_data,
struct gensec_ntlmssp_context);
- struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
- DATA_BLOB sig;
-
- if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
- if (in->length < NTLMSSP_SIG_SIZE) {
- return NT_STATUS_INVALID_PARAMETER;
- }
- sig.data = in->data;
- sig.length = NTLMSSP_SIG_SIZE;
-
- *out = data_blob_talloc(sig_mem_ctx, in->data + NTLMSSP_SIG_SIZE, in->length - NTLMSSP_SIG_SIZE);
-
- return gensec_ntlmssp_unseal_packet(gensec_security, sig_mem_ctx,
- out->data, out->length,
- out->data, out->length,
- &sig);
-
- } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
- NTSTATUS status;
- uint32_t ntlm_seqnum;
- struct arcfour_state ntlm_state;
- uint32_t ntlm2_seqnum_r;
- uint8_t ntlm2_key_r[16];
- struct arcfour_state ntlm2_state_r;
-
- if (in->length < NTLMSSP_SIG_SIZE) {
- return NT_STATUS_INVALID_PARAMETER;
- }
- sig.data = in->data;
- sig.length = NTLMSSP_SIG_SIZE;
- *out = data_blob_talloc(sig_mem_ctx, in->data + NTLMSSP_SIG_SIZE, in->length - NTLMSSP_SIG_SIZE);
- if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
- ntlm2_seqnum_r = gensec_ntlmssp_state->crypt.ntlm2.recv_seq_num;
- ntlm2_state_r = *gensec_ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state;
- memcpy(ntlm2_key_r,
- gensec_ntlmssp_state->crypt.ntlm2.recv_sign_key.data,
- 16);
- } else {
- ntlm_seqnum = gensec_ntlmssp_state->crypt.ntlm.seq_num;
- ntlm_state = *gensec_ntlmssp_state->crypt.ntlm.arcfour_state;
- }
-
- status = gensec_ntlmssp_check_packet(gensec_security, sig_mem_ctx,
- out->data, out->length,
- out->data, out->length,
- &sig);
- if (!NT_STATUS_IS_OK(status)) {
- NTSTATUS check_status = status;
- /*
- * The Windows LDAP libraries seems to have a bug
- * and always use sealing even if only signing was
- * negotiated. So we need to fallback.
- */
-
- if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
- gensec_ntlmssp_state->crypt.ntlm2.recv_seq_num = ntlm2_seqnum_r;
- *gensec_ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state = ntlm2_state_r;
- memcpy(gensec_ntlmssp_state->crypt.ntlm2.recv_sign_key.data,
- ntlm2_key_r, 16);
- } else {
- gensec_ntlmssp_state->crypt.ntlm.seq_num = ntlm_seqnum;
- *gensec_ntlmssp_state->crypt.ntlm.arcfour_state = ntlm_state;
- }
-
- status = gensec_ntlmssp_unseal_packet(gensec_security,
- sig_mem_ctx,
- out->data,
- out->length,
- out->data,
- out->length,
- &sig);
- if (NT_STATUS_IS_OK(status)) {
- gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
- } else {
- status = check_status;
- }
- }
-
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("NTLMSSP packet check for unwrap failed due to invalid signature\n"));
- }
- return status;
- } else {
- *out = *in;
- return NT_STATUS_OK;
- }
+ return ntlmssp_unwrap(gensec_ntlmssp->ntlmssp_state,
+ out_mem_ctx,
+ in, out);
}
-
git.samba.org / idra / samba.git / blobdiff