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r2099: Get rid of another private ARCFOUR implementation from the codebase.

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Andrew Bartlett
This commit is contained in:
Andrew Bartlett 2004-08-30 01:34:01 +00:00 committed by Gerald (Jerry) Carter
parent 16ef31a79e
commit 0237389ce7
3 changed files with 77 additions and 108 deletions
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8
source/libcli/auth/ntlmssp.h
View File

@ -166,10 +166,10 @@ struct ntlmssp_state
uint32_t ntlmssp_seq_num;
/* ntlmv2 */
char send_sign_key[16];
char send_seal_key[16];
char recv_sign_key[16];
char recv_seal_key[16];
DATA_BLOB send_sign_key;
DATA_BLOB send_seal_key;
DATA_BLOB recv_sign_key;
DATA_BLOB recv_seal_key;
uint8_t send_seal_hash[258];
uint8_t recv_seal_hash[258];

135
source/libcli/auth/ntlmssp_sign.c
View File

@ -27,57 +27,6 @@
#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"
static void NTLMSSPcalc_ap(uint8_t *hash, uint8_t *data, int len)
{
uint8_t index_i = hash[256];
uint8_t index_j = hash[257];
int ind;
for (ind = 0; ind < len; ind++)
{
uint8_t tc;
uint8_t t;
index_i++;
index_j += hash[index_i];
tc = hash[index_i];
hash[index_i] = hash[index_j];
hash[index_j] = tc;
t = hash[index_i] + hash[index_j];
data[ind] = data[ind] ^ hash[t];
}
hash[256] = index_i;
hash[257] = index_j;
}
static void calc_hash(uint8_t hash[258], const uint8 *key, size_t key_len)
{
uint8_t j = 0;
int ind;
for (ind = 0; ind < 256; ind++)
{
hash[ind] = (uint8_t)ind;
}
for (ind = 0; ind < 256; ind++)
{
uint8_t tc;
j += (hash[ind] + key[ind%key_len]);
tc = hash[ind];
hash[ind] = hash[j];
hash[j] = tc;
}
hash[256] = 0;
hash[257] = 0;
}
/**
* Some notes on then NTLM2 code:
*
@ -94,16 +43,17 @@ static void calc_hash(uint8_t hash[258], const uint8 *key, size_t key_len)
*
*/
static void calc_ntlmv2_key(uint8_t subkey[16],
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, constant, strlen(constant)+1);
MD5Final(subkey, &ctx3);
MD5Final(subkey->data, &ctx3);
}
enum ntlmssp_direction {
@ -120,31 +70,31 @@ static NTSTATUS ntlmssp_make_packet_signature(struct ntlmssp_state *ntlmssp_stat
if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
HMACMD5Context ctx;
uint8_t seq_num[4];
uint8_t digest[16];
uint8_t seq_num[4];
SIVAL(seq_num, 0, ntlmssp_state->ntlmssp_seq_num);
switch (direction) {
case NTLMSSP_SEND:
hmac_md5_init_limK_to_64(ntlmssp_state->send_sign_key,
sizeof(ntlmssp_state->send_sign_key), &ctx);
hmac_md5_init_limK_to_64(ntlmssp_state->send_sign_key.data,
ntlmssp_state->send_sign_key.length, &ctx);
break;
case NTLMSSP_RECEIVE:
hmac_md5_init_limK_to_64(ntlmssp_state->recv_sign_key,
sizeof(ntlmssp_state->recv_sign_key), &ctx);
hmac_md5_init_limK_to_64(ntlmssp_state->recv_sign_key.data,
ntlmssp_state->recv_sign_key.length, &ctx);
break;
}
hmac_md5_update(seq_num, 4, &ctx);
hmac_md5_update(seq_num, sizeof(seq_num), &ctx);
hmac_md5_update(data, length, &ctx);
hmac_md5_final(digest, &ctx);
if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
switch (direction) {
case NTLMSSP_SEND:
NTLMSSPcalc_ap(ntlmssp_state->send_seal_hash, digest, 8);
arcfour_crypt_sbox(ntlmssp_state->send_seal_hash, digest, 8);
break;
case NTLMSSP_RECEIVE:
NTLMSSPcalc_ap(ntlmssp_state->recv_seal_hash, digest, 8);
arcfour_crypt_sbox(ntlmssp_state->recv_seal_hash, digest, 8);
break;
}
}
@ -160,7 +110,7 @@ static NTSTATUS ntlmssp_make_packet_signature(struct ntlmssp_state *ntlmssp_stat
return NT_STATUS_NO_MEMORY;
}
NTLMSSPcalc_ap(ntlmssp_state->ntlmssp_hash, sig->data+4, sig->length-4);
arcfour_crypt_sbox(ntlmssp_state->ntlmssp_hash, sig->data+4, sig->length-4);
}
dump_data_pw("calculated ntlmssp signature\n", sig->data, sig->length);
return NT_STATUS_OK;
@ -286,8 +236,8 @@ NTSTATUS ntlmssp_seal_packet(struct ntlmssp_state *ntlmssp_state,
uint8_t digest[16];
SIVAL(seq_num, 0, ntlmssp_state->ntlmssp_seq_num);
hmac_md5_init_limK_to_64(ntlmssp_state->send_sign_key,
sizeof(ntlmssp_state->send_sign_key), &ctx);
hmac_md5_init_limK_to_64(ntlmssp_state->send_sign_key.data,
ntlmssp_state->send_sign_key.length, &ctx);
hmac_md5_update(seq_num, 4, &ctx);
hmac_md5_update(data, length, &ctx);
hmac_md5_final(digest, &ctx);
@ -296,10 +246,10 @@ NTSTATUS ntlmssp_seal_packet(struct ntlmssp_state *ntlmssp_state,
then seal the sequence number - this is becouse the send_seal_hash is not
constant, but is is rather updated with each iteration */
NTLMSSPcalc_ap(ntlmssp_state->send_seal_hash, data, length);
arcfour_crypt_sbox(ntlmssp_state->send_seal_hash, data, length);
if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
NTLMSSPcalc_ap(ntlmssp_state->send_seal_hash, digest, 8);
arcfour_crypt_sbox(ntlmssp_state->send_seal_hash, digest, 8);
}
*sig = data_blob_talloc(sig_mem_ctx, NULL, 16);
@ -317,9 +267,9 @@ NTSTATUS ntlmssp_seal_packet(struct ntlmssp_state *ntlmssp_state,
then seal the sequence number - this is becouse the ntlmssp_hash is not
constant, but is is rather updated with each iteration */
NTLMSSPcalc_ap(ntlmssp_state->ntlmssp_hash, data, length);
arcfour_crypt_sbox(ntlmssp_state->ntlmssp_hash, data, length);
NTLMSSPcalc_ap(ntlmssp_state->ntlmssp_hash, sig->data+4, sig->length-4);
arcfour_crypt_sbox(ntlmssp_state->ntlmssp_hash, sig->data+4, sig->length-4);
}
dump_data_pw("ntlmssp signature\n", sig->data, sig->length);
dump_data_pw("ntlmssp sealed data\n", data, length);
@ -347,9 +297,9 @@ 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) {
NTLMSSPcalc_ap(ntlmssp_state->recv_seal_hash, data, length);
arcfour_crypt_sbox(ntlmssp_state->recv_seal_hash, data, length);
} else {
NTLMSSPcalc_ap(ntlmssp_state->ntlmssp_hash, data, length);
arcfour_crypt_sbox(ntlmssp_state->ntlmssp_hash, data, length);
}
dump_data_pw("ntlmssp clear data\n", data, length);
@ -414,41 +364,43 @@ NTSTATUS ntlmssp_sign_init(struct ntlmssp_state *ntlmssp_state)
weak_session_key.length);
/* SEND */
calc_ntlmv2_key(ntlmssp_state->send_sign_key,
calc_ntlmv2_key(ntlmssp_state->mem_ctx,
&ntlmssp_state->send_sign_key,
ntlmssp_state->session_key, send_sign_const);
dump_data_pw("NTLMSSP send sign key:\n",
ntlmssp_state->send_sign_key,
sizeof(ntlmssp_state->send_sign_key));
ntlmssp_state->send_sign_key.data,
ntlmssp_state->send_sign_key.length);
calc_ntlmv2_key(ntlmssp_state->send_seal_key,
calc_ntlmv2_key(ntlmssp_state->mem_ctx,
&ntlmssp_state->send_seal_key,
weak_session_key, send_seal_const);
dump_data_pw("NTLMSSP send seal key:\n",
ntlmssp_state->send_seal_key,
sizeof(ntlmssp_state->send_seal_key));
ntlmssp_state->send_seal_key.data,
ntlmssp_state->send_seal_key.length);
calc_hash(ntlmssp_state->send_seal_hash,
ntlmssp_state->send_seal_key,
sizeof(ntlmssp_state->send_seal_key));
arcfour_init(ntlmssp_state->send_seal_hash,
&ntlmssp_state->send_seal_key);
dump_data_pw("NTLMSSP send sesl hash:\n",
ntlmssp_state->send_seal_hash,
sizeof(ntlmssp_state->send_seal_hash));
/* RECV */
calc_ntlmv2_key(ntlmssp_state->recv_sign_key,
calc_ntlmv2_key(ntlmssp_state->mem_ctx,
&ntlmssp_state->recv_sign_key,
ntlmssp_state->session_key, recv_sign_const);
dump_data_pw("NTLMSSP recv sign key:\n",
ntlmssp_state->recv_sign_key,
sizeof(ntlmssp_state->recv_sign_key));
ntlmssp_state->recv_sign_key.data,
ntlmssp_state->recv_sign_key.length);
calc_ntlmv2_key(ntlmssp_state->recv_seal_key,
calc_ntlmv2_key(ntlmssp_state->mem_ctx,
&ntlmssp_state->recv_seal_key,
weak_session_key, recv_seal_const);
dump_data_pw("NTLMSSP recv seal key:\n",
ntlmssp_state->recv_seal_key,
sizeof(ntlmssp_state->recv_seal_key));
calc_hash(ntlmssp_state->recv_seal_hash,
ntlmssp_state->recv_seal_key,
sizeof(ntlmssp_state->recv_seal_key));
ntlmssp_state->recv_seal_key.data,
ntlmssp_state->recv_seal_key.length);
arcfour_init(ntlmssp_state->recv_seal_hash,
&ntlmssp_state->recv_seal_key);
dump_data_pw("NTLMSSP receive seal hash:\n",
ntlmssp_state->recv_seal_hash,
@ -456,9 +408,8 @@ NTSTATUS ntlmssp_sign_init(struct ntlmssp_state *ntlmssp_state)
} else {
DEBUG(5, ("NTLMSSP Sign/Seal - using NTLM1\n"));
calc_hash(ntlmssp_state->ntlmssp_hash,
ntlmssp_state->session_key.data,
ntlmssp_state->session_key.length);
arcfour_init(ntlmssp_state->ntlmssp_hash,
&ntlmssp_state->session_key);
dump_data_pw("NTLMSSP hash:\n", ntlmssp_state->ntlmssp_hash,
sizeof(ntlmssp_state->ntlmssp_hash));
}

36
source/libcli/util/smbdes.c
View File

@ -364,17 +364,11 @@ void des_crypt112_16(uint8_t out[16], uint8_t in[16], const uint8_t key[14], int
des_crypt56(out + 8, in + 8, key+7, forw);
}
/*
arcfour encryption with a blob key
*/
void arcfour_crypt_blob(uint8_t *data, int len, const DATA_BLOB *key)
/* initialise the arcfour sbox with key */
void arcfour_init(uint8_t s_box[256], const DATA_BLOB *key)
{
uint8_t s_box[256];
uint8_t index_i = 0;
uint8_t index_j = 0;
uint8_t j = 0;
int ind;
uint8_t j = 0;
for (ind = 0; ind < 256; ind++) {
s_box[ind] = (uint8_t)ind;
}
@ -388,6 +382,18 @@ void arcfour_crypt_blob(uint8_t *data, int len, const DATA_BLOB *key)
s_box[ind] = s_box[j];
s_box[j] = tc;
}
s_box[256] = 0; /* i */
s_box[257] = 0; /* j */
}
/* crypt the data with arcfour */
void arcfour_crypt_sbox(uint8_t s_box[258], uint8_t *data, int len)
{
uint8_t index_i = s_box[256];
uint8_t index_j = s_box[257];
int ind;
for (ind = 0; ind < len; ind++) {
uint8_t tc;
uint8_t t;
@ -402,6 +408,18 @@ void arcfour_crypt_blob(uint8_t *data, int len, const DATA_BLOB *key)
t = s_box[index_i] + s_box[index_j];
data[ind] = data[ind] ^ s_box[t];
}
s_box[256] = index_i;
s_box[257] = index_j;
}
/*
arcfour encryption with a blob key
*/
void arcfour_crypt_blob(uint8_t *data, int len, const DATA_BLOB *key)
{
uint8_t s_box[258];
arcfour_init(s_box, key);
arcfour_crypt_sbox(s_box, data, len);
}
/*