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hashcat/src/modules/module_16500.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"
#include "emu_inc_hash_md5.h"
#include "memory.h"
static const u32 ATTACK_EXEC = ATTACK_EXEC_INSIDE_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_16;
static const u32 HASH_CATEGORY = HASH_CATEGORY_NETWORK_PROTOCOL;
static const char *HASH_NAME = "JWT (JSON Web Token)";
static const u64 KERN_TYPE = 16511;
static const u32 OPTI_TYPE = OPTI_TYPE_ZERO_BYTE
| OPTI_TYPE_NOT_ITERATED;
static const u64 OPTS_TYPE = OPTS_TYPE_PT_GENERATE_BE
| OPTS_TYPE_SELF_TEST_DISABLE;
static const u32 SALT_TYPE = SALT_TYPE_EMBEDDED;
static const char *ST_PASS = "hashcat";
static const char *ST_HASH = "eyJhbGciOiJIUzI1NiJ9.eyIzNDM2MzQyMCI6NTc2ODc1NDd9.f1nXZ3V_Hrr6ee-AFCTLaHRnrkiKmio2t3JqwL32guY";
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; }
typedef struct jwt
{
u32 salt_buf[1024];
u32 salt_len;
u32 signature_len;
} jwt_t;
typedef enum kern_type_jwt
{
KERN_TYPE_JWT_HS256 = 16511,
KERN_TYPE_JWT_HS384 = 16512,
KERN_TYPE_JWT_HS512 = 16513,
} kern_type_jwt_t;
salt_t *module_benchmark_salt (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
{
salt_t *salt = (salt_t *) hcmalloc (sizeof (salt_t));
salt->salt_iter = 1;
salt->salt_len = 16;
return salt;
}
void *module_benchmark_esalt (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
{
jwt_t *jwt = (jwt_t *) hcmalloc (sizeof (jwt_t));
jwt->signature_len = 43;
jwt->salt_len = 32;
return jwt;
}
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 (jwt_t);
return esalt_size;
}
u64 module_kern_type_dynamic (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)
{
const jwt_t *jwt = (const jwt_t *) esalt_buf;
u64 kern_type = -1;
// it would be more accurate to base64 decode the header_pos buffer and then to string match HS256 - same goes for the other algorithms
if (jwt->signature_len == 43)
{
kern_type = KERN_TYPE_JWT_HS256;
}
else if (jwt->signature_len == 64)
{
kern_type = KERN_TYPE_JWT_HS384;
}
else if (jwt->signature_len == 86)
{
kern_type = KERN_TYPE_JWT_HS512;
}
else
{
return (PARSER_HASH_LENGTH);
}
return kern_type;
}
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)
{
jwt_t *jwt = (jwt_t *) esalt_buf;
token_t token;
token.token_cnt = 3;
token.sep[0] = '.';
token.len_min[0] = 1;
token.len_max[0] = 2047;
token.attr[0] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_BASE64C;
token.sep[1] = '.';
token.len_min[1] = 1;
token.len_max[1] = 2047;
token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_BASE64C;
token.sep[2] = '.';
token.len_min[2] = 43;
token.len_max[2] = 86;
token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH
| TOKEN_ATTR_VERIFY_BASE64C;
const int rc_tokenizer = input_tokenizer ((const u8 *) line_buf, line_len, &token);
if (rc_tokenizer != PARSER_OK) return (rc_tokenizer);
// header
const int header_len = token.len[0];
// payload
const int payload_len = token.len[1];
// signature
const u8 *signature_pos = token.buf[2];
const int signature_len = token.len[2];
jwt->signature_len = signature_len;
// esalt
const int esalt_len = header_len + 1 + payload_len;
if (esalt_len > 4096) return (PARSER_SALT_LENGTH);
memcpy (jwt->salt_buf, line_buf, esalt_len);
jwt->salt_len = esalt_len;
// salt
//
// Create a hash of the esalt because esalt buffer can change somewhere behind salt->salt_buf size
// Not a regular MD5 but good enough
u32 hash[4];
hash[0] = 0;
hash[1] = 1;
hash[2] = 2;
hash[3] = 3;
u32 block[16];
memset (block, 0, sizeof (block));
for (int i = 0; i < 1024; i += 16)
{
for (int j = 0; j < 16; j++)
{
block[j] = jwt->salt_buf[i + j];
md5_transform (block + 0, block + 4, block + 8, block + 12, hash);
}
}
salt->salt_buf[0] = hash[0];
salt->salt_buf[1] = hash[1];
salt->salt_buf[2] = hash[2];
salt->salt_buf[3] = hash[3];
salt->salt_len = 16;
// hash
u8 tmp_buf[100] = { 0 };
base64_decode (base64url_to_int, signature_pos, signature_len, tmp_buf);
if (signature_len == 43)
{
memcpy (digest_buf, tmp_buf, 32);
u32 *digest = (u32 *) digest_buf;
digest[0] = byte_swap_32 (digest[0]);
digest[1] = byte_swap_32 (digest[1]);
digest[2] = byte_swap_32 (digest[2]);
digest[3] = byte_swap_32 (digest[3]);
digest[4] = byte_swap_32 (digest[4]);
digest[5] = byte_swap_32 (digest[5]);
digest[6] = byte_swap_32 (digest[6]);
digest[7] = byte_swap_32 (digest[7]);
}
else if (signature_len == 64)
{
memcpy (digest_buf, tmp_buf, 48);
u64 *digest = (u64 *) digest_buf;
digest[0] = byte_swap_64 (digest[0]);
digest[1] = byte_swap_64 (digest[1]);
digest[2] = byte_swap_64 (digest[2]);
digest[3] = byte_swap_64 (digest[3]);
digest[4] = byte_swap_64 (digest[4]);
digest[5] = byte_swap_64 (digest[5]);
}
else if (signature_len == 86)
{
memcpy (digest_buf, tmp_buf, 64);
u64 *digest = (u64 *) digest_buf;
digest[0] = byte_swap_64 (digest[0]);
digest[1] = byte_swap_64 (digest[1]);
digest[2] = byte_swap_64 (digest[2]);
digest[3] = byte_swap_64 (digest[3]);
digest[4] = byte_swap_64 (digest[4]);
digest[5] = byte_swap_64 (digest[5]);
digest[6] = byte_swap_64 (digest[6]);
digest[7] = byte_swap_64 (digest[7]);
}
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 jwt_t *jwt = (const jwt_t *) esalt_buf;
const u32 *digest32 = (const u32 *) digest_buf;
const u64 *digest64 = (const u64 *) digest_buf;
char tmp_buf[128] = { 0 };
char ptr_plain[128];
if (hashconfig->kern_type == KERN_TYPE_JWT_HS256)
{
u32 tmp[8];
tmp[0] = byte_swap_32 (digest32[0]);
tmp[1] = byte_swap_32 (digest32[1]);
tmp[2] = byte_swap_32 (digest32[2]);
tmp[3] = byte_swap_32 (digest32[3]);
tmp[4] = byte_swap_32 (digest32[4]);
tmp[5] = byte_swap_32 (digest32[5]);
tmp[6] = byte_swap_32 (digest32[6]);
tmp[7] = byte_swap_32 (digest32[7]);
memcpy (tmp_buf, tmp, 32);
base64_encode (int_to_base64url, (const u8 *) tmp_buf, 32, (u8 *) ptr_plain);
ptr_plain[43] = 0;
}
else if (hashconfig->kern_type == KERN_TYPE_JWT_HS384)
{
u64 tmp[6];
tmp[0] = byte_swap_64 (digest64[0]);
tmp[1] = byte_swap_64 (digest64[1]);
tmp[2] = byte_swap_64 (digest64[2]);
tmp[3] = byte_swap_64 (digest64[3]);
tmp[4] = byte_swap_64 (digest64[4]);
tmp[5] = byte_swap_64 (digest64[5]);
memcpy (tmp_buf, tmp, 48);
base64_encode (int_to_base64url, (const u8 *) tmp_buf, 48, (u8 *) ptr_plain);
ptr_plain[64] = 0;
}
else if (hashconfig->kern_type == KERN_TYPE_JWT_HS512)
{
u64 tmp[8];
tmp[0] = byte_swap_64 (digest64[0]);
tmp[1] = byte_swap_64 (digest64[1]);
tmp[2] = byte_swap_64 (digest64[2]);
tmp[3] = byte_swap_64 (digest64[3]);
tmp[4] = byte_swap_64 (digest64[4]);
tmp[5] = byte_swap_64 (digest64[5]);
tmp[6] = byte_swap_64 (digest64[6]);
tmp[7] = byte_swap_64 (digest64[7]);
memcpy (tmp_buf, tmp, 64);
base64_encode (int_to_base64url, (const u8 *) tmp_buf, 64, (u8 *) ptr_plain);
ptr_plain[86] = 0;
}
const int line_len = snprintf (line_buf, line_size, "%s.%s", (char *) jwt->salt_buf, (char *) ptr_plain);
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_benchmark_esalt;
module_ctx->module_benchmark_hook_salt = MODULE_DEFAULT;
module_ctx->module_benchmark_mask = MODULE_DEFAULT;
module_ctx->module_benchmark_salt = module_benchmark_salt;
module_ctx->module_build_plain_postprocess = MODULE_DEFAULT;
module_ctx->module_deep_comp_kernel = 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_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_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_kern_type_dynamic;
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_DEFAULT;
module_ctx->module_unstable_warning = MODULE_DEFAULT;
module_ctx->module_warmup_disable = MODULE_DEFAULT;
}
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