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Code Issues Releases Wiki Activity

Do not increase output length in parse_and_store_generic_salt() if OPTS_TYPE_ST_ADD80 or similar is used

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This commit is contained in:
jsteube 2018-06-29 12:33:02 +02:00
parent 319374e917
commit 6817876324
1 changed files with 32 additions and 21 deletions
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53
src/interface.c
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@ -2602,7 +2602,7 @@ static bool parse_and_store_generic_salt (u8 *out_buf, int *out_len, const u8 *i
}
else
{
memcpy (tmp_buf, in_buf, in_len);
if (in_len) memcpy (tmp_buf, in_buf, in_len);
tmp_len = in_len;
}
@ -2632,25 +2632,27 @@ static bool parse_and_store_generic_salt (u8 *out_buf, int *out_len, const u8 *i
uppercase (tmp_buf, tmp_len);
}
int tmp2_len = tmp_len;
if (hashconfig->opts_type & OPTS_TYPE_ST_ADD80)
{
if (tmp_len >= 256) return false;
if (tmp2_len >= 256) return false;
tmp_buf[tmp_len++] = 0x80;
tmp_buf[tmp2_len++] = 0x80;
}
if (hashconfig->opts_type & OPTS_TYPE_ST_ADD01)
{
if (tmp_len >= 256) return false;
if (tmp2_len >= 256) return false;
tmp_buf[tmp_len++] = 0x01;
tmp_buf[tmp2_len++] = 0x01;
}
if (hashconfig->opts_type & OPTS_TYPE_ST_GENERATE_LE)
{
u32 max = tmp_len / 4;
u32 max = tmp2_len / 4;
if (tmp_len % 4) max++;
if (tmp2_len % 4) max++;
for (u32 i = 0; i < max; i++)
{
@ -2664,10 +2666,10 @@ static bool parse_and_store_generic_salt (u8 *out_buf, int *out_len, const u8 *i
// we swapped them, some important bytes could be in positions
// we normally skip with the original len
if (tmp_len % 4) tmp_len += 4 - (tmp_len % 4);
if (tmp2_len % 4) tmp2_len += 4 - (tmp2_len % 4);
}
memcpy (out_buf, tmp_buf, tmp_len);
memcpy (out_buf, tmp_buf, tmp2_len);
*out_len = tmp_len;
@ -4995,18 +4997,29 @@ int postgresql_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE
int md5md5_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNUSED hashconfig_t *hashconfig)
{
if ((input_len < DISPLAY_LEN_MIN_2600) || (input_len > DISPLAY_LEN_MAX_2600)) return (PARSER_GLOBAL_LENGTH);
u32 *digest = (u32 *) hash_buf->digest;
salt_t *salt = hash_buf->salt;
if (is_valid_hex_string (input_buf, 32) == false) return (PARSER_HASH_ENCODING);
token_t token;
digest[0] = hex_to_u32 ((const u8 *) &input_buf[ 0]);
digest[1] = hex_to_u32 ((const u8 *) &input_buf[ 8]);
digest[2] = hex_to_u32 ((const u8 *) &input_buf[16]);
digest[3] = hex_to_u32 ((const u8 *) &input_buf[24]);
token.token_cnt = 1;
token.len_min[0] = 32;
token.len_max[0] = 32;
token.attr[0] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
const int rc_tokenizer = input_tokenizer (input_buf, input_len, &token);
if (rc_tokenizer != PARSER_OK) return (rc_tokenizer);
u8 *hash_pos = token.buf[0];
digest[0] = hex_to_u32 (hash_pos + 0);
digest[1] = hex_to_u32 (hash_pos + 8);
digest[2] = hex_to_u32 (hash_pos + 16);
digest[3] = hex_to_u32 (hash_pos + 24);
if (hashconfig->opti_type & OPTI_TYPE_PRECOMPUTE_MERKLE)
{
@ -5022,13 +5035,11 @@ int md5md5_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_UNU
* This way we can save a special md5md5 kernel and reuse the one from vbull.
*/
u8 *salt_buf_ptr = (u8 *) salt->salt_buf;
static const u8 *zero = "";
u32 salt_len = parse_and_store_salt_legacy (salt_buf_ptr, (u8 *) "", 0, hashconfig);
const bool parse_rc = parse_and_store_generic_salt ((u8 *) salt->salt_buf, (int *) &salt->salt_len, zero, 0, hashconfig);
if (salt_len == UINT_MAX) return (PARSER_SALT_LENGTH);
salt->salt_len = salt_len;
if (parse_rc == false) return (PARSER_SALT_LENGTH);
return (PARSER_OK);
}