/** * 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 "memory.h" #include "emu_inc_hash_md5.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; // 4_3 static const u32 HASH_CATEGORY = HASH_CATEGORY_NETWORK_PROTOCOL; static const char *HASH_NAME = "SNMPv3 HMAC-MD5-96"; static const u64 KERN_TYPE = 25100; static const u32 OPTI_TYPE = OPTI_TYPE_ZERO_BYTE; 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 = "hashcat1"; static const char *ST_HASH = "$SNMPv3$1$45889431$30818f0201033011020409242fc0020300ffe304010102010304383036041180001f88808106d566db57fd600000000002011002020118040a6d61747269785f4d4435040c0000000000000000000000000400303d041180001f88808106d566db57fd60000000000400a226020411f319300201000201003018301606082b06010201010200060a2b06010401bf0803020a$80001f88808106d566db57fd6000000000$1b37c3ea872731f922959e90"; 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; } static const char *SIGNATURE_SNMPV3 = "$SNMPv3$1$"; #define SNMPV3_SALT_MAX 1500 #define SNMPV3_ENGINEID_MAX 34 #define SNMPV3_MSG_AUTH_PARAMS_LEN 12 #define SNMPV3_ROUNDS 1048576 #define SNMPV3_MAX_PW_LENGTH 64 #define SNMPV3_TMP_ELEMS 4096 // 4096 = (256 (max pw length) * 64) / sizeof (u32) #define SNMPV3_HASH_ELEMS 4 #define SNMPV3_MAX_SALT_ELEMS 512 // 512 * 4 = 2048 > 1500, also has to be multiple of 64 #define SNMPV3_MAX_ENGINE_ELEMS 16 // 16 * 4 = 64 > 32, also has to be multiple of 64 #define SNMPV3_MAX_PNUM_ELEMS 4 // 4 * 4 = 16 > 9 typedef struct hmac_md5_tmp { u32 tmp[SNMPV3_TMP_ELEMS]; u32 h[SNMPV3_HASH_ELEMS]; } hmac_md5_tmp_t; typedef struct snmpv3 { u32 salt_buf[SNMPV3_MAX_SALT_ELEMS]; u32 salt_len; u32 engineID_buf[SNMPV3_MAX_ENGINE_ELEMS]; u32 engineID_len; u32 packet_number[SNMPV3_MAX_PNUM_ELEMS]; } snmpv3_t; 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 (snmpv3_t); return esalt_size; } 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 (hmac_md5_tmp_t); return tmp_size; } u32 module_kernel_loops_min (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { // we need to fix iteration count to guarantee the loop count is a multiple of 64 // 2k calls to md5_transform typically is enough to overtime pcie bottleneck const u32 kernel_loops_min = 2048 * 64; return kernel_loops_min; } u32 module_kernel_loops_max (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 u32 kernel_loops_max = 2048 * 64; return kernel_loops_max; } 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; snmpv3_t *snmpv3 = (snmpv3_t *) esalt_buf; hc_token_t token; memset (&token, 0, sizeof (hc_token_t)); token.token_cnt = 5; token.signatures_cnt = 1; token.signatures_buf[0] = SIGNATURE_SNMPV3; token.len[0] = 10; token.attr[0] = TOKEN_ATTR_FIXED_LENGTH | TOKEN_ATTR_VERIFY_SIGNATURE; // packet number token.len_min[1] = 1; token.len_max[1] = 8; token.sep[1] = '$'; token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH | TOKEN_ATTR_VERIFY_DIGIT; // salt token.len_min[2] = SNMPV3_MSG_AUTH_PARAMS_LEN * 2; token.len_max[2] = SNMPV3_SALT_MAX * 2; token.sep[2] = '$'; token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH | TOKEN_ATTR_VERIFY_HEX; // engineid token.len_min[3] = 26; token.len_max[3] = SNMPV3_ENGINEID_MAX; token.sep[3] = '$'; token.attr[3] = TOKEN_ATTR_VERIFY_LENGTH | TOKEN_ATTR_VERIFY_HEX; // digest token.len[4] = SNMPV3_MSG_AUTH_PARAMS_LEN * 2; token.sep[4] = '$'; token.attr[4] = 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); // packet number const u8 *packet_number_pos = token.buf[1]; const int packet_number_len = token.len[1]; memset (snmpv3->packet_number, 0, sizeof (snmpv3->packet_number)); strncpy ((char *) snmpv3->packet_number, (char *) packet_number_pos, packet_number_len); // salt const u8 *salt_pos = token.buf[2]; const int salt_len = token.len[2]; u8 *salt_ptr = (u8 *) snmpv3->salt_buf; snmpv3->salt_len = hex_decode (salt_pos, salt_len, salt_ptr); salt->salt_iter = SNMPV3_ROUNDS; // handle unique salts detection md5_ctx_t md5_ctx; md5_init (&md5_ctx); md5_update (&md5_ctx, snmpv3->salt_buf, snmpv3->salt_len); md5_final (&md5_ctx); // store md5(snmpv3->salt_buf) in salt_buf salt->salt_len = 16; memcpy (salt->salt_buf, md5_ctx.h, salt->salt_len); // engineid const u8 *engineID_pos = token.buf[3]; const int engineID_len = token.len[3]; u8 *engineID_ptr = (u8 *) snmpv3->engineID_buf; snmpv3->engineID_len = hex_decode (engineID_pos, engineID_len, engineID_ptr); // digest const u8 *hash_pos = token.buf[4]; 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] = 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 u32 *digest = (const u32 *) digest_buf; snmpv3_t *snmpv3 = (snmpv3_t *) esalt_buf; u8 *out_buf = (u8 *) line_buf; int out_len = snprintf (line_buf, line_size, "%s%s$", SIGNATURE_SNMPV3, (char *) snmpv3->packet_number); out_len += hex_encode ((u8 *) snmpv3->salt_buf, snmpv3->salt_len, out_buf + out_len); out_buf[out_len] = '$'; out_len++; out_len += hex_encode ((u8 *) snmpv3->engineID_buf, snmpv3->engineID_len, out_buf + out_len); out_buf[out_len] = '$'; out_len++; u32_to_hex (digest[0], out_buf + out_len); out_len += 8; u32_to_hex (digest[1], out_buf + out_len); out_len += 8; u32_to_hex (digest[2], out_buf + out_len); out_len += 8; out_buf[out_len] = 0; return out_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_kernel_loops_max; module_ctx->module_kernel_loops_min = module_kernel_loops_min; 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; }