text: /**
   * 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_cipher_des.h"
  #include "emu_inc_hash_md5.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_4;
  static const u32   HASH_CATEGORY  = HASH_CATEGORY_NETWORK_PROTOCOL;
  static const char *HASH_NAME      = "NetNTLMv1 / NetNTLMv1+ESS";
  static const u64   KERN_TYPE      = 5500;
  static const u32   OPTI_TYPE      = OPTI_TYPE_ZERO_BYTE;
  static const u64   OPTS_TYPE      = OPTS_TYPE_PT_GENERATE_LE
                                    | OPTS_TYPE_PT_ADD80
                                    | OPTS_TYPE_PT_ADDBITS14
                                    | OPTS_TYPE_PT_UTF16LE
                                    | OPTS_TYPE_ST_HEX;
  static const u32   SALT_TYPE      = SALT_TYPE_EMBEDDED;
  static const char *ST_PASS        = "hashcat";
  static const char *ST_HASH        = "::5V4T:ada06359242920a500000000000000000000000000000000:0556d5297b5daa70eaffde82ef99293a3f3bb59b7c9704ea:9c23f6c094853920";
  
  typedef struct netntlm
  {
    int user_len;
    int domain_len;
    int srvchall_len;
    int clichall_len;
  
    u32 userdomain_buf[64];
    u32 chall_buf[256];
  
  } netntlm_t;
  
  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 void transform_netntlmv1_key (const u8 *nthash, u8 *key)
  {
    key[0] =                    (nthash[0] >> 0);
    key[1] = (nthash[0] << 7) | (nthash[1] >> 1);
    key[2] = (nthash[1] << 6) | (nthash[2] >> 2);
    key[3] = (nthash[2] << 5) | (nthash[3] >> 3);
    key[4] = (nthash[3] << 4) | (nthash[4] >> 4);
    key[5] = (nthash[4] << 3) | (nthash[5] >> 5);
    key[6] = (nthash[5] << 2) | (nthash[6] >> 6);
    key[7] = (nthash[6] << 1);
  
    key[0] |= 0x01;
    key[1] |= 0x01;
    key[2] |= 0x01;
    key[3] |= 0x01;
    key[4] |= 0x01;
    key[5] |= 0x01;
    key[6] |= 0x01;
    key[7] |= 0x01;
  }
  
  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)
  {
    char *jit_build_options = NULL;
  
    // Extra treatment for Apple systems
    if (device_param->opencl_platform_vendor_id == VENDOR_ID_APPLE)
    {
      return jit_build_options;
    }
  
    // Intel CPU
    if ((device_param->opencl_device_vendor_id == VENDOR_ID_INTEL_SDK) && (device_param->opencl_device_type & CL_DEVICE_TYPE_CPU))
    {
      hc_asprintf (&jit_build_options, "-D _unroll");
    }
  
    return jit_build_options;
  }
  
  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 (netntlm_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;
  
    netntlm_t *netntlm = (netntlm_t *) esalt_buf;
  
    token_t token;
  
    token.token_cnt  = 6;
  
    // username
    token.len_min[0] = 0;
    token.len_max[0] = 60;
    token.sep[0]     = ':';
    token.attr[0]    = TOKEN_ATTR_VERIFY_LENGTH;
  
    // unused
    token.len_min[1] = 0;
    token.len_max[1] = 0;
    token.sep[1]     = ':';
    token.attr[1]    = TOKEN_ATTR_VERIFY_LENGTH;
  
    // domain
    token.len_min[2] = 0;
    token.len_max[2] = 45;
    token.sep[2]     = ':';
    token.attr[2]    = TOKEN_ATTR_VERIFY_LENGTH;
  
    // lm response
    token.len_min[3] = 0;
    token.len_max[3] = 48;
    token.sep[3]     = ':';
    token.attr[3]    = TOKEN_ATTR_VERIFY_LENGTH
                     | TOKEN_ATTR_VERIFY_HEX;
  
    // ntlm response
    token.len_min[4] = 48;
    token.len_max[4] = 48;
    token.sep[4]     = ':';
    token.attr[4]    = TOKEN_ATTR_VERIFY_LENGTH
                     | TOKEN_ATTR_VERIFY_HEX;
  
    // challenge
    token.len_min[5] = 16;
    token.len_max[5] = 16;
    token.sep[5]     = ':';
    token.attr[5]    = TOKEN_ATTR_VERIFY_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     = token.buf[0];
    const u8 *domain_pos   = token.buf[2];
    const u8 *srvchall_pos = token.buf[3];
    const u8 *hash_pos     = token.buf[4];
    const u8 *clichall_pos = token.buf[5];
  
    const int user_len     = token.len[0];
    const int domain_len   = token.len[2];
    const int srvchall_len = token.len[3];
    const int clichall_len = token.len[5];
  
    /**
     * store some data for later use
     */
  
    netntlm->user_len     = user_len     * 2;
    netntlm->domain_len   = domain_len   * 2;
    netntlm->srvchall_len = srvchall_len / 2;
    netntlm->clichall_len = clichall_len / 2;
  
    u8 *userdomain_ptr = (u8 *) netntlm->userdomain_buf;
    u8 *chall_ptr      = (u8 *) netntlm->chall_buf;
  
    /**
     * handle username and domainname
     */
  
    for (int i = 0; i < user_len; i++)
    {
      *userdomain_ptr++ = user_pos[i];
      *userdomain_ptr++ = 0;
    }
  
    for (int i = 0; i < domain_len; i++)
    {
      *userdomain_ptr++ = domain_pos[i];
      *userdomain_ptr++ = 0;
    }
  
    /**
     * handle server challenge encoding
     */
  
    for (int i = 0; i < srvchall_len; i += 2)
    {
      const u8 p0 = srvchall_pos[i + 0];
      const u8 p1 = srvchall_pos[i + 1];
  
      *chall_ptr++ = hex_convert (p1) << 0
                   | hex_convert (p0) << 4;
    }
  
    /**
     * handle client challenge encoding
     */
  
    for (int i = 0; i < clichall_len; i += 2)
    {
      const u8 p0 = clichall_pos[i + 0];
      const u8 p1 = clichall_pos[i + 1];
  
      *chall_ptr++ = hex_convert (p1) << 0
                   | hex_convert (p0) << 4;
    }
  
    /**
     * store data
     */
  
    const bool parse_rc = generic_salt_decode (hashconfig, clichall_pos, clichall_len, (u8 *) salt->salt_buf, (int *) &salt->salt_len);
  
    if (parse_rc == false) return (PARSER_SALT_LENGTH);
  
    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] = hex_to_u32 (hash_pos + 24);
  
    /* special case, last 8 byte do not need to be checked since they are brute-forced next */
  
    u32 digest_tmp[2];
  
    digest_tmp[0] = hex_to_u32 (hash_pos + 32);
    digest_tmp[1] = hex_to_u32 (hash_pos + 40);
  
    /* special case 2: ESS */
  
    if (srvchall_len == 48)
    {
      if ((netntlm->chall_buf[2] == 0) && (netntlm->chall_buf[3] == 0) && (netntlm->chall_buf[4] == 0) && (netntlm->chall_buf[5] == 0))
      {
        u32 w[16] = { 0 };
  
        w[ 0] = salt->salt_buf[0];
        w[ 1] = salt->salt_buf[1];
        w[ 2] = netntlm->chall_buf[0];
        w[ 3] = netntlm->chall_buf[1];
        w[ 4] = 0x80;
        w[14] = 16 * 8;
  
        u32 dgst[4] = { 0 };
  
        dgst[0] = MD5M_A;
        dgst[1] = MD5M_B;
        dgst[2] = MD5M_C;
        dgst[3] = MD5M_D;
  
        md5_transform (w + 0, w + 4, w + 8, w + 12, dgst);
  
        salt->salt_buf[0] = dgst[0];
        salt->salt_buf[1] = dgst[1];
      }
    }
  
    /* precompute netntlmv1 exploit start */
  
    for (u32 i = 0; i < 0x10000; i++)
    {
      u32 key_md4[2] = { 0 };
      u32 key_des[2] = { 0 };
  
      key_md4[0] = i;
  
      transform_netntlmv1_key ((const u8 *) key_md4, (u8 *) key_des);
  
      u32 Kc[16] = { 0 };
      u32 Kd[16] = { 0 };
  
      _des_crypt_keysetup (key_des[0], key_des[1], Kc, Kd, (u32 (*)[64]) c_skb);
  
      u32 data3[2] = { salt->salt_buf[0], salt->salt_buf[1] };
  
      _des_crypt_encrypt (data3, data3, Kc, Kd, (u32 (*)[64]) c_SPtrans);
  
      if (data3[0] != digest_tmp[0]) continue;
      if (data3[1] != digest_tmp[1]) continue;
  
      salt->salt_buf[2] = i;
  
      salt->salt_len = 24;
  
      break;
    }
  
    salt->salt_buf_pc[0] = digest_tmp[0];
    salt->salt_buf_pc[1] = digest_tmp[1];
  
    /* precompute netntlmv1 exploit stop */
  
    DES_IP (digest[0], digest[1]);
    DES_IP (digest[2], digest[3]);
  
    digest[0] = rotr32 (digest[0], 29);
    digest[1] = rotr32 (digest[1], 29);
    digest[2] = rotr32 (digest[2], 29);
    digest[3] = rotr32 (digest[3], 29);
  
    DES_IP (salt->salt_buf[0], salt->salt_buf[1]);
  
    salt->salt_buf[0] = rotl32 (salt->salt_buf[0], 3);
    salt->salt_buf[1] = rotl32 (salt->salt_buf[1], 3);
  
    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;
  
    const netntlm_t *netntlm = (const netntlm_t *) esalt_buf;
  
    // we can not change anything in the original buffer, otherwise destroying sorting
    // therefore create some local buffer
  
    u32 tmp[4];
  
    tmp[0] = digest[0];
    tmp[1] = digest[1];
    tmp[2] = digest[2];
    tmp[3] = digest[3];
  
    tmp[0] = rotl32 (tmp[0], 29);
    tmp[1] = rotl32 (tmp[1], 29);
    tmp[2] = rotl32 (tmp[2], 29);
    tmp[3] = rotl32 (tmp[3], 29);
  
    DES_FP (tmp[1], tmp[0]);
    DES_FP (tmp[3], tmp[2]);
  
    u8 *out_buf = (u8 *) line_buf;
  
    int out_len = 0;
  
    u8 *ptr;
  
    ptr = (u8 *) netntlm->userdomain_buf;
  
    for (int i = 0; i < netntlm->user_len; i += 2)
    {
      out_buf[out_len++] = ptr[i];
    }
  
    out_buf[out_len++] = ':';
    out_buf[out_len++] = ':';
  
    ptr += netntlm->user_len;
  
    for (int i = 0; i < netntlm->domain_len; i += 2)
    {
      out_buf[out_len++] = ptr[i];
    }
  
    out_buf[out_len++] = ':';
  
    ptr = (u8 *) netntlm->chall_buf;
  
    for (int i = 0; i < netntlm->srvchall_len; i++)
    {
      u8_to_hex (ptr[i], out_buf + out_len); out_len += 2;
    }
  
    out_buf[out_len++] = ':';
  
    u32_to_hex (tmp[0], out_buf + out_len); out_len += 8;
    u32_to_hex (tmp[1], out_buf + out_len); out_len += 8;
    u32_to_hex (tmp[2], out_buf + out_len); out_len += 8;
    u32_to_hex (tmp[3], out_buf + out_len); out_len += 8;
  
    u32_to_hex (salt->salt_buf_pc[0], out_buf + out_len); out_len += 8;
    u32_to_hex (salt->salt_buf_pc[1], out_buf + out_len); out_len += 8;
  
    out_buf[out_len++] = ':';
  
    ptr += netntlm->srvchall_len;
  
    for (int i = 0; i < netntlm->clichall_len; i++)
    {
      u8_to_hex (ptr[i], out_buf + out_len); out_len += 2;
    }
  
    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_salt           = MODULE_DEFAULT;
    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_jit_build_options;
    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_DEFAULT;
    module_ctx->module_unstable_warning         = MODULE_DEFAULT;
    module_ctx->module_warmup_disable           = MODULE_DEFAULT;
  }
  