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-m 11600 = 7-Zip: added support for parsing $7z$1... and $7z$2... hashes

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Attention: the LZMA/LZMA2 decompression step still needs to be implemented (e.g. via a hook)
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philsmd 2017-01-12 20:28:16 +01:00
parent a1c13778c7
commit 98fee66486
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GPG Key ID: 4F25D016D9D6A8AF
2 changed files with 24 additions and 10 deletions
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5
docs/changes.txt
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@ -1,4 +1,9 @@
* changes v3.30 -> v3.xx:
##
## Features
##
- Added support for parsing 7-Zip hashes with LZMA/LZMA2 compression indicator set to a non-zero value
##
## Workarounds

29
src/interface.c
View File

@ -11054,13 +11054,13 @@ int seven_zip_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_
* parse line
*/
u8 *p_buf_pos = input_buf + 4;
u8 *lzma_buf_pos = input_buf + 4;
u8 *NumCyclesPower_pos = (u8 *) strchr ((const char *) p_buf_pos, '$');
u8 *NumCyclesPower_pos = (u8 *) strchr ((const char *) lzma_buf_pos, '$');
if (NumCyclesPower_pos == NULL) return (PARSER_SEPARATOR_UNMATCHED);
u32 p_buf_len = NumCyclesPower_pos - p_buf_pos;
u32 lzma_buf_len = NumCyclesPower_pos - lzma_buf_pos;
NumCyclesPower_pos++;
@ -11128,11 +11128,11 @@ int seven_zip_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_
data_buf_pos++;
u32 data_buf_len = input_len - 1 - 2 - 1 - p_buf_len - 1 - NumCyclesPower_len - 1 - salt_len_len - 1 - salt_buf_len - 1 - iv_len_len - 1 - iv_buf_len - 1 - crc_buf_len - 1 - data_len_len - 1 - unpack_size_len - 1;
u32 data_buf_len = input_len - 1 - 2 - 1 - lzma_buf_len - 1 - NumCyclesPower_len - 1 - salt_len_len - 1 - salt_buf_len - 1 - iv_len_len - 1 - iv_buf_len - 1 - crc_buf_len - 1 - data_len_len - 1 - unpack_size_len - 1;
const u32 iter = atoll ((const char *) NumCyclesPower_pos);
const u32 crc = atoll ((const char *) crc_buf_pos);
const u32 p_buf = atoll ((const char *) p_buf_pos);
const u32 lzma_buf = atoll ((const char *) lzma_buf_pos);
const u32 salt_len = atoll ((const char *) salt_len_pos);
const u32 iv_len = atoll ((const char *) iv_len_pos);
const u32 unpack_size = atoll ((const char *) unpack_size_pos);
@ -11142,8 +11142,8 @@ int seven_zip_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_
* verify some data
*/
if (p_buf != 0) return (PARSER_SALT_VALUE);
if (salt_len != 0) return (PARSER_SALT_VALUE);
if (lzma_buf > 2) return (PARSER_SALT_VALUE);
if (salt_len != 0) return (PARSER_SALT_VALUE);
if ((data_len * 2) != data_buf_len) return (PARSER_SALT_VALUE);
@ -11195,7 +11195,7 @@ int seven_zip_parse_hash (u8 *input_buf, u32 input_len, hash_t *hash_buf, MAYBE_
salt->salt_len = 16;
salt->salt_sign[0] = iter;
salt->salt_sign[0] = lzma_buf;
salt->salt_iter = 1u << iter;
@ -15675,11 +15675,20 @@ int ascii_digest (hashcat_ctx_t *hashcat_ctx, char *out_buf, const size_t out_le
sprintf (data_buf + j, "%02x", ptr[i]);
}
u32 salt_iter = salt.salt_iter;
u32 cost = 0; // the log2 () of salt_iter
while (salt_iter >>= 1)
{
cost++;
}
snprintf (out_buf, out_len - 1, "%s%d$%u$%d$%s$%u$%08x%08x%08x%08x$%u$%u$%u$%s",
SIGNATURE_SEVEN_ZIP,
0,
salt.salt_sign[0],
0,
cost,
seven_zip->salt_len,
(char *) seven_zip->salt_buf,
seven_zip->iv_len,
seven_zip->iv_buf[0],