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wmi-1.3.16 from opsview.com

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Are Casilla
2019-02-16 00:16:52 +01:00
parent 163fdd3d1b
commit 17b3af2911
2146 changed files with 678824 additions and 0 deletions
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Samba/source/auth/ntlmssp/ntlmssp_sign.c
+549
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/*
* 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 2 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, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "includes.h"
#include "auth/auth.h"
#include "auth/ntlmssp/ntlmssp.h"
#include "auth/ntlmssp/msrpc_parse.h"
#include "lib/crypto/crypto.h"
#include "auth/credentials/credentials.h"
#include "auth/gensec/gensec.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 */
_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,
DATA_BLOB *sig)
{
struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
return ntlmssp_make_packet_signature(gensec_ntlmssp_state, sig_mem_ctx,
data, length,
whole_pdu, pdu_length,
NTLMSSP_SEND, sig, True);
}
/**
* Check the signature of an incoming packet
*
*/
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,
const DATA_BLOB *sig)
{
struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
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;
}
if (sig->length < 8) {
DEBUG(0, ("NTLMSSP packet check failed due to short signature (%lu bytes)!\n",
(unsigned long)sig->length));
}
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 check 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(5, ("BAD SIG NTLM2: wanted signature over %llu bytes of input:\n", (unsigned long long)pdu_length));
dump_data(5, local_sig.data, local_sig.length);
DEBUG(5, ("BAD SIG: got signature over %llu bytes of input:\n", (unsigned long long)pdu_length));
dump_data(5, sig->data, sig->length);
DEBUG(0, ("NTLMSSP NTLM2 packet check failed due to invalid signature on %llu bytes of input!\n", (unsigned long long)pdu_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(5, ("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(5, ("BAD SIG: got signature of %llu bytes of input:\n", (unsigned long long)length));
dump_data(5, sig->data, sig->length);
DEBUG(0, ("NTLMSSP NTLM1 packet check failed due to invalid signature on %llu bytes of input:\n", (unsigned long long)length));
return NT_STATUS_ACCESS_DENIED;
}
}
dump_data_pw("checked ntlmssp signature\n", sig->data, sig->length);
return NT_STATUS_OK;
}
/**
* 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,
DATA_BLOB *sig)
{
struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
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 becouse 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 becouse 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);
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,
const DATA_BLOB *sig)
{
struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
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);
return gensec_ntlmssp_check_packet(gensec_security, sig_mem_ctx, data, length, whole_pdu, pdu_length, sig);
}
/**
Initialise the state for NTLMSSP signing.
*/
/* TODO: make this non-public */
_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));
gensec_ntlmssp_state->crypt.ntlm.seq_num = 0;
}
talloc_free(mem_ctx);
return NT_STATUS_OK;
}
size_t gensec_ntlmssp_sig_size(struct gensec_security *gensec_security, size_t data_size)
{
return NTLMSSP_SIG_SIZE;
}
NTSTATUS gensec_ntlmssp_wrap(struct gensec_security *gensec_security,
TALLOC_CTX *sig_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;
} else {
*out = *in;
return NT_STATUS_OK;
}
}
NTSTATUS gensec_ntlmssp_unwrap(struct gensec_security *gensec_security,
TALLOC_CTX *sig_mem_ctx,
const DATA_BLOB *in,
DATA_BLOB *out)
{
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)) {
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_check_packet(gensec_security, sig_mem_ctx,
out->data, out->length,
out->data, out->length,
&sig);
} else {
*out = *in;
return NT_STATUS_OK;
}
}