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-rw-r--r--source4/auth/ntlmssp/ntlmssp_sign.c184
1 files changed, 110 insertions, 74 deletions
diff --git a/source4/auth/ntlmssp/ntlmssp_sign.c b/source4/auth/ntlmssp/ntlmssp_sign.c
index 7877439962..50ad2fdd3a 100644
--- a/source4/auth/ntlmssp/ntlmssp_sign.c
+++ b/source4/auth/ntlmssp/ntlmssp_sign.c
@@ -1,20 +1,20 @@
-/*
+/*
* 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/>.
*/
@@ -42,7 +42,7 @@
static void calc_ntlmv2_key(TALLOC_CTX *mem_ctx,
DATA_BLOB *subkey,
- DATA_BLOB session_key,
+ DATA_BLOB session_key,
const char *constant)
{
struct MD5Context ctx3;
@@ -66,7 +66,6 @@ static NTSTATUS ntlmssp_make_packet_signature(struct ntlmssp_state *ntlmssp_stat
DATA_BLOB *sig, bool encrypt_sig)
{
if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
-
HMACMD5Context ctx;
uint8_t digest[16];
uint8_t seq_num[4];
@@ -94,13 +93,15 @@ static NTSTATUS ntlmssp_make_packet_signature(struct ntlmssp_state *ntlmssp_stat
hmac_md5_update(whole_pdu, pdu_length, &ctx);
hmac_md5_final(digest, &ctx);
- if (encrypt_sig && ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
+ if (encrypt_sig && (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)) {
switch (direction) {
case NTLMSSP_SEND:
- arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state, digest, 8);
+ arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state,
+ digest, 8);
break;
case NTLMSSP_RECEIVE:
- arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state, digest, 8);
+ arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state,
+ digest, 8);
break;
}
}
@@ -109,11 +110,12 @@ static NTSTATUS ntlmssp_make_packet_signature(struct ntlmssp_state *ntlmssp_stat
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));
+ 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,
@@ -122,9 +124,11 @@ static NTSTATUS ntlmssp_make_packet_signature(struct ntlmssp_state *ntlmssp_stat
}
ntlmssp_state->crypt.ntlm.seq_num++;
- arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm.arcfour_state, sig->data+4, sig->length-4);
+ arcfour_crypt_sbox(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));
+ 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;
@@ -136,11 +140,15 @@ NTSTATUS ntlmssp_sign_packet(struct ntlmssp_state *ntlmssp_state,
const uint8_t *whole_pdu, size_t pdu_length,
DATA_BLOB *sig)
{
- return ntlmssp_make_packet_signature(ntlmssp_state,
- sig_mem_ctx,
- data, length,
- whole_pdu, pdu_length,
- NTLMSSP_SEND, sig, true);
+ NTSTATUS nt_status;
+
+ nt_status = ntlmssp_make_packet_signature(ntlmssp_state,
+ sig_mem_ctx,
+ data, length,
+ whole_pdu, pdu_length,
+ NTLMSSP_SEND, sig, true);
+
+ return nt_status;
}
/**
@@ -162,40 +170,45 @@ NTSTATUS ntlmssp_check_packet(struct ntlmssp_state *ntlmssp_state,
return NT_STATUS_NO_USER_SESSION_KEY;
}
- nt_status = ntlmssp_make_packet_signature(ntlmssp_state, sig_mem_ctx,
+ nt_status = ntlmssp_make_packet_signature(ntlmssp_state,
+ sig_mem_ctx,
data, length,
whole_pdu, pdu_length,
- NTLMSSP_RECEIVE, &local_sig, true);
+ 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)));
+ DEBUG(0,("NTLMSSP packet sig creation failed with %s\n",
+ nt_errstr(nt_status)));
return nt_status;
}
if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
if (local_sig.length != sig->length ||
- memcmp(local_sig.data,
- sig->data, sig->length) != 0) {
+ 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));
+ 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));
+
+ DEBUG(10,("BAD SIG: got signature over %llu bytes of input:\n",
+ (unsigned long long)pdu_length));
dump_data(10, sig->data, sig->length);
-
+
data_blob_free(&local_sig);
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));
+ 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));
+
+ DEBUG(10,("BAD SIG: got signature of %llu bytes of input:\n",
+ (unsigned long long)length));
dump_data(10, sig->data, sig->length);
-
+
data_blob_free(&local_sig);
return NT_STATUS_ACCESS_DENIED;
}
@@ -218,8 +231,6 @@ NTSTATUS ntlmssp_seal_packet(struct ntlmssp_state *ntlmssp_state,
const uint8_t *whole_pdu, size_t pdu_length,
DATA_BLOB *sig)
{
- NTSTATUS nt_status;
-
if (!ntlmssp_state->session_key.length) {
DEBUG(3, ("NO session key, cannot seal packet\n"));
return NT_STATUS_NO_USER_SESSION_KEY;
@@ -228,19 +239,33 @@ NTSTATUS ntlmssp_seal_packet(struct ntlmssp_state *ntlmssp_state,
DEBUG(10,("ntlmssp_seal_data: seal\n"));
dump_data_pw("ntlmssp clear data\n", data, length);
if (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(ntlmssp_state, sig_mem_ctx,
+ NTSTATUS nt_status;
+ /*
+ * 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(ntlmssp_state,
+ sig_mem_ctx,
data, length,
whole_pdu, pdu_length,
- NTLMSSP_SEND, sig, false);
- arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state, data, length);
+ NTLMSSP_SEND,
+ sig, false);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return nt_status;
+ }
+
+ arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state,
+ data, length);
if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
- arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state, sig->data+4, 8);
+ arcfour_crypt_sbox(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,
@@ -248,23 +273,27 @@ NTSTATUS ntlmssp_seal_packet(struct ntlmssp_state *ntlmssp_state,
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 */
+ /*
+ * The order of these two operations matters - we
+ * must first seal the packet, then seal the
+ * sequence number - this is because the ntlmv1_arc4_state
+ * is not constant, but is is rather updated with
+ * each iteration
+ */
+
+ arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm.arcfour_state,
+ data, length);
+
+ arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm.arcfour_state,
+ sig->data+4, sig->length-4);
- arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm.arcfour_state, data, length);
- arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm.arcfour_state, sig->data+4, sig->length-4);
/* increment counter on send */
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);
-
- return nt_status;
+ return NT_STATUS_OK;
}
/**
@@ -287,15 +316,22 @@ NTSTATUS ntlmssp_unseal_packet(struct ntlmssp_state *ntlmssp_state,
dump_data_pw("ntlmssp sealed data\n", data, length);
if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
- arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state, data, length);
+ arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state,
+ data, length);
} else {
- arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm.arcfour_state, data, length);
+ arcfour_crypt_sbox(ntlmssp_state->crypt.ntlm.arcfour_state,
+ data, length);
}
dump_data_pw("ntlmssp clear data\n", data, length);
- status = ntlmssp_check_packet(ntlmssp_state, sig_mem_ctx, data, length, whole_pdu, pdu_length, sig);
+ status = ntlmssp_check_packet(ntlmssp_state,
+ 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));
+ DEBUG(1,("NTLMSSP packet check for unseal failed due to invalid signature on %llu bytes of input:\n",
+ (unsigned long long)length));
}
return status;
}
@@ -321,8 +357,7 @@ NTSTATUS ntlmssp_sign_init(struct ntlmssp_state *ntlmssp_state)
return NT_STATUS_NO_USER_SESSION_KEY;
}
- if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2)
- {
+ if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
DATA_BLOB weak_session_key = ntlmssp_state->session_key;
const char *send_sign_const;
const char *send_seal_const;
@@ -355,29 +390,27 @@ NTSTATUS ntlmssp_sign_init(struct ntlmssp_state *ntlmssp_state)
ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state = talloc(ntlmssp_state, struct arcfour_state);
NT_STATUS_HAVE_NO_MEMORY(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.
+ /*
+ * 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, but must be done on the encryption subkeys only.
*/
if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_128) {
-
+ /* nothing to do */
} else if (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.data,
weak_session_key.length);
/* SEND: sign key */
@@ -387,7 +420,7 @@ NTSTATUS ntlmssp_sign_init(struct ntlmssp_state *ntlmssp_state)
dump_data_pw("NTLMSSP send sign key:\n",
ntlmssp_state->crypt.ntlm2.send_sign_key.data,
ntlmssp_state->crypt.ntlm2.send_sign_key.length);
-
+
/* SEND: seal ARCFOUR pad */
calc_ntlmv2_key(mem_ctx,
&send_seal_key,
@@ -401,6 +434,9 @@ NTSTATUS ntlmssp_sign_init(struct ntlmssp_state *ntlmssp_state)
ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state->sbox,
sizeof(ntlmssp_state->crypt.ntlm2.send_seal_arcfour_state->sbox));
+ /* SEND: seq num */
+ ntlmssp_state->crypt.ntlm2.send_seq_num = 0;
+
/* RECV: sign key */
calc_ntlmv2_key(ntlmssp_state,
&ntlmssp_state->crypt.ntlm2.recv_sign_key,
@@ -422,7 +458,7 @@ NTSTATUS ntlmssp_sign_init(struct ntlmssp_state *ntlmssp_state)
ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state->sbox,
sizeof(ntlmssp_state->crypt.ntlm2.recv_seal_arcfour_state->sbox));
- ntlmssp_state->crypt.ntlm2.send_seq_num = 0;
+ /* RECV: seq num */
ntlmssp_state->crypt.ntlm2.recv_seq_num = 0;
} else {
generated by cgit (git 2.34.1) at 2024-12-18 16:54:49 +0000