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Code Issues Releases Wiki Activity

Added support to use 'John the Ripper' hash format with hash-type 13100

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This commit is contained in:
Gabriele Gristina 2022-02-26 19:14:20 +01:00
parent 4ed01c2299
commit 8e00ef9a88
2 changed files with 125 additions and 48 deletions
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1
docs/changes.txt
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@ -18,6 +18,7 @@
- Added support to building universal macOS binary on Apple Silicon
- Added hex encoding format for --separator option
- Added password candidates range to --status-json output
- Added support to use 'John the Ripper' hash format with hash-type 13100
##
## Bugs

172
src/modules/module_13100.c
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@ -48,9 +48,11 @@ typedef struct krb5tgs
u32 edata2[5120];
u32 edata2_len;
u32 format;
} krb5tgs_t;
static const char *SIGNATURE_KRB5TGS = "$krb5tgs$23$";
static const char *SIGNATURE_KRB5TGS = "$krb5tgs$";
char *module_jit_build_options (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra, MAYBE_UNUSED const hashes_t *hashes, MAYBE_UNUSED const hc_device_param_t *device_param)
{
@ -117,33 +119,90 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
token.signatures_cnt = 1;
token.signatures_buf[0] = SIGNATURE_KRB5TGS;
token.len[0] = 12;
token.len[0] = 9;
token.attr[0] = TOKEN_ATTR_FIXED_LENGTH
| TOKEN_ATTR_VERIFY_SIGNATURE;
/**
* $krb5tgs$23$checksum$edata2
* $krb5tgs$23$*user*realm*spn*$checksum$edata2
* hc
* format 1: $krb5tgs$23$*user*realm*spn*$checksum$edata2
* format 2: $krb5tgs$23$checksum$edata2
*
* jtr
* format 3: $krb5tgs$spn$checksum$edata2
*/
if (line_len < 16) return (PARSER_SALT_LENGTH);
if (line_len < 9) return (PARSER_SALT_LENGTH);
if (line_buf[12] == '*')
if (line_buf[9] == '2' && line_buf[10] == '3' && line_buf[11] == '$')
{
char *account_info_start = (char *) line_buf + 12; // we want the * char included
char *account_info_stop = strchr ((const char *) account_info_start + 1, '*');
if (line_buf[12] == '*')
{
char *account_info_start = (char *) line_buf + 12; // we want the * char included
if (account_info_stop == NULL) return (PARSER_SEPARATOR_UNMATCHED);
char *account_info_stop = strchr ((const char *) account_info_start + 1, '*');
account_info_stop++; // we want the * char included
account_info_stop++; // we want the $ char included
if (account_info_stop == NULL) return (PARSER_SEPARATOR_UNMATCHED);
const int account_info_len = account_info_stop - account_info_start;
account_info_stop++; // we want the * char included
account_info_stop++; // we want the $ char included
const int account_info_len = account_info_stop - account_info_start;
token.token_cnt = 5;
token.sep[1] = '$';
token.len_min[1] = 2;
token.len_max[1] = 2;
token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_DIGIT;
token.len[2] = account_info_len;
token.attr[2] = TOKEN_ATTR_FIXED_LENGTH;
token.sep[3] = '$';
token.len_min[3] = 32;
token.len_max[3] = 32;
token.attr[3] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
token.sep[4] = '$';
token.len_min[4] = 64;
token.len_max[4] = 40960;
token.attr[4] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
}
else
{
token.token_cnt = 4;
token.sep[1] = '$';
token.len_min[1] = 2;
token.len_max[1] = 2;
token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_DIGIT;
token.sep[2] = '$';
token.len_min[2] = 32;
token.len_max[2] = 32;
token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
token.sep[3] = '$';
token.len_min[3] = 64;
token.len_max[3] = 40960;
token.attr[3] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
}
}
else
{
token.token_cnt = 4;
token.len[1] = account_info_len;
token.attr[1] = TOKEN_ATTR_FIXED_LENGTH;
token.sep[1] = ':';
token.len_min[1] = 0;
token.len_max[1] = 2048;
token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH;
token.sep[2] = '$';
token.len_min[2] = 32;
@ -157,22 +216,6 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
token.attr[3] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
}
else
{
token.token_cnt = 3;
token.sep[1] = '$';
token.len_min[1] = 32;
token.len_max[1] = 32;
token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
token.sep[2] = '$';
token.len_min[2] = 64;
token.len_max[2] = 40960;
token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
}
const int rc_tokenizer = input_tokenizer ((const u8 *) line_buf, line_len, &token);
@ -183,7 +226,30 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
int data_len;
if (line_buf[12] == '*')
if (line_buf[9] == '2' && line_buf[10] == '3' && line_buf[11] == '$')
{
if (line_buf[12] == '*')
{
checksum_pos = token.buf[3];
data_pos = token.buf[4];
data_len = token.len[4];
memcpy (krb5tgs->account_info, token.buf[2], token.len[2]);
krb5tgs->format = 1;
}
else
{
checksum_pos = token.buf[2];
data_pos = token.buf[3];
data_len = token.len[3];
krb5tgs->account_info[0] = 0;
krb5tgs->format = 2;
}
}
else
{
checksum_pos = token.buf[2];
@ -191,15 +257,7 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
data_len = token.len[3];
memcpy (krb5tgs->account_info, token.buf[1], token.len[1]);
}
else
{
checksum_pos = token.buf[1];
data_pos = token.buf[2];
data_len = token.len[2];
krb5tgs->account_info[0] = 0;
krb5tgs->format = 3;
}
krb5tgs->checksum[0] = hex_to_u32 (checksum_pos + 0);
@ -251,14 +309,32 @@ int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
sprintf (data + j, "%02x", ptr_edata2[i]);
}
const int line_len = snprintf (line_buf, line_size, "%s%s%08x%08x%08x%08x$%s",
SIGNATURE_KRB5TGS,
(char *) krb5tgs->account_info,
byte_swap_32 (krb5tgs->checksum[0]),
byte_swap_32 (krb5tgs->checksum[1]),
byte_swap_32 (krb5tgs->checksum[2]),
byte_swap_32 (krb5tgs->checksum[3]),
data);
int line_len;
// preserve the input hash format
if (krb5tgs->format != 3) // hc
{
line_len = snprintf (line_buf, line_size, "%s23$%s%08x%08x%08x%08x$%s",
SIGNATURE_KRB5TGS,
(char *) krb5tgs->account_info,
byte_swap_32 (krb5tgs->checksum[0]),
byte_swap_32 (krb5tgs->checksum[1]),
byte_swap_32 (krb5tgs->checksum[2]),
byte_swap_32 (krb5tgs->checksum[3]),
data);
}
else // jtr
{
line_len = snprintf (line_buf, line_size, "%s%s:%08x%08x%08x%08x$%s",
SIGNATURE_KRB5TGS,
(char *) krb5tgs->account_info,
byte_swap_32 (krb5tgs->checksum[0]),
byte_swap_32 (krb5tgs->checksum[1]),
byte_swap_32 (krb5tgs->checksum[2]),
byte_swap_32 (krb5tgs->checksum[3]),
data);
}
return line_len;
}