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hashcat/src/modules/module_33100.c

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/**
* Author......: See docs/credits.txt
* License.....: MIT
*/
#include "common.h"
#include "types.h"
#include "modules.h"
#include "bitops.h"
#include "convert.h"
#include "shared.h"
static const u32 ATTACK_EXEC = ATTACK_EXEC_OUTSIDE_KERNEL;
static const u32 DGST_POS0 = 0;
static const u32 DGST_POS1 = 1;
static const u32 DGST_POS2 = 2;
static const u32 DGST_POS3 = 3;
static const u32 DGST_SIZE = DGST_SIZE_4_4;
static const u32 HASH_CATEGORY = HASH_CATEGORY_NETWORK_PROTOCOL;
static const char *HASH_NAME = "Kerberos 5, etype 17, AS-REP";
static const u64 KERN_TYPE = 33100;
static const u32 OPTI_TYPE = OPTI_TYPE_ZERO_BYTE
| OPTI_TYPE_NOT_ITERATED
| OPTI_TYPE_SLOW_HASH_SIMD_LOOP;
static const u64 OPTS_TYPE = OPTS_TYPE_STOCK_MODULE
| OPTS_TYPE_PT_GENERATE_LE;
static const u32 SALT_TYPE = SALT_TYPE_EMBEDDED;
static const char *ST_PASS = "hashcat";
static const char *ST_HASH = "$krb5asrep$17$user$EXAMPLE.COM$a419c4030e555734b06c2629$c09a1421f96eb126c757a4b87830381f142477d9a85b2beb3093dbfd44f38ddb6016a479537fb7b36e046315869fe79187217971ff6a12c1e0a2df3f68045e03814b21f756d8981f781803d65e8572823c88979581d93cf7d768f2efced16f3719b8d1004d9e73d798de255383476bced47d1982f16be77d0feb55a1f44f58bd013fa4caee58ac614caf0f1cf9101ec9623c5b8c2a1491b73f134f074790088fdb360b5ebce0d32a8145ed00a81ddf77188e150b92d8e8ddd0285d27f1514253e5546e6bba864b362bb1e6483b26d08fa4cc268bfbefe0f690039bcc524b774599df3680c1c3431d891bfa99514a877f964e";
u32 module_attack_exec (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ATTACK_EXEC; }
u32 module_dgst_pos0 (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS0; }
u32 module_dgst_pos1 (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS1; }
u32 module_dgst_pos2 (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS2; }
u32 module_dgst_pos3 (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS3; }
u32 module_dgst_size (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_SIZE; }
u32 module_hash_category (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return HASH_CATEGORY; }
const char *module_hash_name (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return HASH_NAME; }
u64 module_kern_type (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return KERN_TYPE; }
u32 module_opti_type (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return OPTI_TYPE; }
u64 module_opts_type (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return OPTS_TYPE; }
u32 module_salt_type (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return SALT_TYPE; }
const char *module_st_hash (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_HASH; }
const char *module_st_pass (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_PASS; }
// Struct to store the hash structure - same fields as TGS-REP type 17
typedef struct krb5asrep_17
{
u32 user[128];
u32 domain[128];
u32 account_info[512];
u32 account_info_len;
u32 checksum[3];
u32 edata2[5120];
u32 edata2_len;
u32 format;
} krb5asrep_17_t;
typedef struct krb5asrep_17_tmp
{
u32 ipad[5];
u32 opad[5];
u32 dgst[16];
u32 out[16];
} krb5asrep_17_tmp_t;
static const char *SIGNATURE_KRB5ASREP = "$krb5asrep$17$";
u64 module_tmp_size (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
{
const u64 tmp_size = (const u64) sizeof (krb5asrep_17_tmp_t);
return tmp_size;
}
u64 module_esalt_size (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
{
const u64 esalt_size = (const u64) sizeof (krb5asrep_17_t);
return esalt_size;
}
int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED void *digest_buf, MAYBE_UNUSED salt_t *salt, MAYBE_UNUSED void *esalt_buf, MAYBE_UNUSED void *hook_salt_buf, MAYBE_UNUSED hashinfo_t *hash_info, const char *line_buf, MAYBE_UNUSED const int line_len)
{
u32 *digest = (u32 *) digest_buf;
krb5asrep_17_t *krb5asrep = (krb5asrep_17_t *) esalt_buf;
hc_token_t token;
memset (&token, 0, sizeof (hc_token_t));
token.signatures_cnt = 1;
token.signatures_buf[0] = SIGNATURE_KRB5ASREP;
token.len[0] = strlen (SIGNATURE_KRB5ASREP);
token.attr[0] = TOKEN_ATTR_FIXED_LENGTH
| TOKEN_ATTR_VERIFY_SIGNATURE;
/**
* Haschat
* format 1: $krb5asrep$18$user$realm$checksum$edata2
*
* JtR
* format 2: $krb5asrep$18$salt$edata2$checksum
*/
if (line_len < (int) strlen (SIGNATURE_KRB5ASREP)) return (PARSER_SALT_LENGTH);
memset (krb5asrep, 0, sizeof (krb5asrep_17_t));
/**
* JtR format has the checksum at the end, so can identify it based on the
* separator ('$') being at a fixed length from the end of the line. Checksum
* is 24 characters in length, so then there should be a '$' at line_len - 25
*/
if (line_buf[line_len - 25] == '$')
{
// JtR format
krb5asrep->format = 2;
}
else
{
// Hashcat format
krb5asrep->format = 1;
}
token.token_cnt = 4;
if (krb5asrep->format == 1)
{
token.token_cnt++;
// user
token.sep[1] = '$';
token.len_min[1] = 1;
token.len_max[1] = 512;
token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH;
// realm
token.sep[2] = '$';
token.len_min[2] = 1;
token.len_max[2] = 512;
token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH;
// checksum
token.sep[3] = '$';
// hmac-sha1 stripped to 12bytes
token.len[3] = 24;
token.attr[3] = TOKEN_ATTR_FIXED_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
// edata2
token.sep[4] = '$';
token.len_min[4] = 64;
token.len_max[4] = 40960;
token.attr[4] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
}
else
{
// salt
token.sep[1] = '$';
token.len_min[1] = 1;
token.len_max[1] = 512;
token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH;
// edata2
token.sep[2] = '$';
token.len_min[2] = 64;
token.len_max[2] = 40960;
token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
// checksum
token.sep[3] = '$';
// hmac-sha1 stripped to 12bytes
token.len[3] = 24;
token.attr[3] = TOKEN_ATTR_FIXED_LENGTH
| TOKEN_ATTR_VERIFY_HEX;
}
const int rc_tokenizer = input_tokenizer ((const u8 *) line_buf, line_len, &token);
if (rc_tokenizer != PARSER_OK) return (rc_tokenizer);
const u8 *user_pos;
const u8 *domain_pos;
const u8 *salt_pos;
const u8 *checksum_pos;
const u8 *data_pos;
int user_len;
int domain_len;
int data_len;
int account_info_len;
if (krb5asrep->format == 1)
{
user_pos = token.buf[1];
user_len = token.len[1];
memcpy (krb5asrep->user, user_pos, user_len);
domain_pos = token.buf[2];
domain_len = token.len[2];
memcpy (krb5asrep->domain, domain_pos, domain_len);
checksum_pos = token.buf[3];
data_pos = token.buf[4];
data_len = token.len[4];
account_info_len = token.len[2] + token.len[1];
}
else
{
salt_pos = token.buf[1];
account_info_len = token.len[1];
memcpy (krb5asrep->account_info, salt_pos, account_info_len);
/**
* JtR format only has the final salt/account_info value (combination of
* user and domain), rather than separate "user" and "domain" values. Since
* user and domain won't be used for the JtR format, their values won't
* matter, so set them both to the same value as account_info.
*/
user_pos = token.buf[1];
user_len = token.len[1];
memcpy (krb5asrep->user, user_pos, user_len);
domain_pos = token.buf[1];
domain_len = token.len[1];
memcpy (krb5asrep->domain, domain_pos, domain_len);
data_pos = token.buf[2];
data_len = token.len[2];
checksum_pos = token.buf[3];
}
u8 *account_info_ptr = (u8 *) krb5asrep->account_info;
// Domain must be uppercase
u8 domain[128];
if (krb5asrep->format == 1)
{
memcpy (domain, domain_pos, domain_len);
uppercase (domain, domain_len);
memcpy (account_info_ptr, domain, domain_len);
memcpy (account_info_ptr + domain_len, user_pos, user_len);
}
krb5asrep->account_info_len = account_info_len;
// hmac-sha1 is reduced to 12 bytes
krb5asrep->checksum[0] = byte_swap_32 (hex_to_u32 (checksum_pos + 0));
krb5asrep->checksum[1] = byte_swap_32 (hex_to_u32 (checksum_pos + 8));
krb5asrep->checksum[2] = byte_swap_32 (hex_to_u32 (checksum_pos + 16));
u8 *edata_ptr = (u8 *) krb5asrep->edata2;
for (int i = 0; i < data_len; i += 2)
{
const u8 p0 = data_pos[i + 0];
const u8 p1 = data_pos[i + 1];
*edata_ptr++ = hex_convert (p1) << 0
| hex_convert (p0) << 4;
}
krb5asrep->edata2_len = data_len / 2;
salt->salt_buf[0] = krb5asrep->checksum[0];
salt->salt_buf[1] = krb5asrep->checksum[1];
salt->salt_buf[2] = krb5asrep->checksum[2];
salt->salt_len = 12;
salt->salt_iter = 4096 - 1;
digest[0] = krb5asrep->checksum[0];
digest[1] = krb5asrep->checksum[1];
digest[2] = krb5asrep->checksum[2];
digest[3] = 0;
return (PARSER_OK);
}
int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const void *digest_buf, MAYBE_UNUSED const salt_t *salt, MAYBE_UNUSED const void *esalt_buf, MAYBE_UNUSED const void *hook_salt_buf, MAYBE_UNUSED const hashinfo_t *hash_info, char *line_buf, MAYBE_UNUSED const int line_size)
{
const krb5asrep_17_t *krb5asrep = (const krb5asrep_17_t *) esalt_buf;
char data[5120 * 4 * 2] = { 0 };
for (u32 i = 0, j = 0; i < krb5asrep->edata2_len; i += 1, j += 2)
{
u8 *ptr_edata2 = (u8 *) krb5asrep->edata2;
sprintf (data + j, "%02x", ptr_edata2[i]);
}
int line_len = 0;
if (krb5asrep->format == 1)
{
line_len = snprintf (line_buf, line_size, "%s%s$%s$%08x%08x%08x$%s",
SIGNATURE_KRB5ASREP,
(char *) krb5asrep->user,
(char *) krb5asrep->domain,
krb5asrep->checksum[0],
krb5asrep->checksum[1],
krb5asrep->checksum[2],
data);
}
else
{
line_len = snprintf (line_buf, line_size, "%s%s$%s$%08x%08x%08x",
SIGNATURE_KRB5ASREP,
(char *) krb5asrep->account_info,
data,
krb5asrep->checksum[0],
krb5asrep->checksum[1],
krb5asrep->checksum[2]);
}
return line_len;
}
void module_init (module_ctx_t *module_ctx)
{
module_ctx->module_context_size = MODULE_CONTEXT_SIZE_CURRENT;
module_ctx->module_interface_version = MODULE_INTERFACE_VERSION_CURRENT;
module_ctx->module_attack_exec = module_attack_exec;
module_ctx->module_benchmark_esalt = MODULE_DEFAULT;
module_ctx->module_benchmark_hook_salt = MODULE_DEFAULT;
module_ctx->module_benchmark_mask = MODULE_DEFAULT;
module_ctx->module_benchmark_charset = MODULE_DEFAULT;
module_ctx->module_benchmark_salt = MODULE_DEFAULT;
module_ctx->module_build_plain_postprocess = MODULE_DEFAULT;
module_ctx->module_deep_comp_kernel = MODULE_DEFAULT;
module_ctx->module_deprecated_notice = MODULE_DEFAULT;
module_ctx->module_dgst_pos0 = module_dgst_pos0;
module_ctx->module_dgst_pos1 = module_dgst_pos1;
module_ctx->module_dgst_pos2 = module_dgst_pos2;
module_ctx->module_dgst_pos3 = module_dgst_pos3;
module_ctx->module_dgst_size = module_dgst_size;
module_ctx->module_dictstat_disable = MODULE_DEFAULT;
module_ctx->module_esalt_size = module_esalt_size;
module_ctx->module_extra_buffer_size = MODULE_DEFAULT;
module_ctx->module_extra_tmp_size = MODULE_DEFAULT;
module_ctx->module_extra_tuningdb_block = MODULE_DEFAULT;
module_ctx->module_forced_outfile_format = MODULE_DEFAULT;
module_ctx->module_hash_binary_count = MODULE_DEFAULT;
module_ctx->module_hash_binary_parse = MODULE_DEFAULT;
module_ctx->module_hash_binary_save = MODULE_DEFAULT;
module_ctx->module_hash_decode_postprocess = MODULE_DEFAULT;
module_ctx->module_hash_decode_potfile = MODULE_DEFAULT;
module_ctx->module_hash_decode_zero_hash = MODULE_DEFAULT;
module_ctx->module_hash_decode = module_hash_decode;
module_ctx->module_hash_encode_status = MODULE_DEFAULT;
module_ctx->module_hash_encode_potfile = MODULE_DEFAULT;
module_ctx->module_hash_encode = module_hash_encode;
module_ctx->module_hash_init_selftest = MODULE_DEFAULT;
module_ctx->module_hash_mode = MODULE_DEFAULT;
module_ctx->module_hash_category = module_hash_category;
module_ctx->module_hash_name = module_hash_name;
module_ctx->module_hashes_count_min = MODULE_DEFAULT;
module_ctx->module_hashes_count_max = MODULE_DEFAULT;
module_ctx->module_hlfmt_disable = MODULE_DEFAULT;
module_ctx->module_hook_extra_param_size = MODULE_DEFAULT;
module_ctx->module_hook_extra_param_init = MODULE_DEFAULT;
module_ctx->module_hook_extra_param_term = MODULE_DEFAULT;
module_ctx->module_hook12 = MODULE_DEFAULT;
module_ctx->module_hook23 = MODULE_DEFAULT;
module_ctx->module_hook_salt_size = MODULE_DEFAULT;
module_ctx->module_hook_size = MODULE_DEFAULT;
module_ctx->module_jit_build_options = MODULE_DEFAULT;
module_ctx->module_jit_cache_disable = MODULE_DEFAULT;
module_ctx->module_kernel_accel_max = MODULE_DEFAULT;
module_ctx->module_kernel_accel_min = MODULE_DEFAULT;
module_ctx->module_kernel_loops_max = MODULE_DEFAULT;
module_ctx->module_kernel_loops_min = MODULE_DEFAULT;
module_ctx->module_kernel_threads_max = MODULE_DEFAULT;
module_ctx->module_kernel_threads_min = MODULE_DEFAULT;
module_ctx->module_kern_type = module_kern_type;
module_ctx->module_kern_type_dynamic = MODULE_DEFAULT;
module_ctx->module_opti_type = module_opti_type;
module_ctx->module_opts_type = module_opts_type;
module_ctx->module_outfile_check_disable = MODULE_DEFAULT;
module_ctx->module_outfile_check_nocomp = MODULE_DEFAULT;
module_ctx->module_potfile_custom_check = MODULE_DEFAULT;
module_ctx->module_potfile_disable = MODULE_DEFAULT;
module_ctx->module_potfile_keep_all_hashes = MODULE_DEFAULT;
module_ctx->module_pwdump_column = MODULE_DEFAULT;
module_ctx->module_pw_max = MODULE_DEFAULT;
module_ctx->module_pw_min = MODULE_DEFAULT;
module_ctx->module_salt_max = MODULE_DEFAULT;
module_ctx->module_salt_min = MODULE_DEFAULT;
module_ctx->module_salt_type = module_salt_type;
module_ctx->module_separator = MODULE_DEFAULT;
module_ctx->module_st_hash = module_st_hash;
module_ctx->module_st_pass = module_st_pass;
module_ctx->module_tmp_size = module_tmp_size;
module_ctx->module_unstable_warning = MODULE_DEFAULT;
module_ctx->module_warmup_disable = MODULE_DEFAULT;
}
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