/**
 * 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_INSIDE_KERNEL;
static const u32   DGST_POS0      = 3;
static const u32   DGST_POS1      = 4;
static const u32   DGST_POS2      = 2;
static const u32   DGST_POS3      = 1;
static const u32   DGST_SIZE      = DGST_SIZE_4_5;
static const u32   HASH_CATEGORY  = HASH_CATEGORY_NETWORK_SERVER;
static const char *HASH_NAME      = "DNSSEC (NSEC3)";
static const u64   KERN_TYPE      = 8300;
static const u32   OPTI_TYPE      = OPTI_TYPE_ZERO_BYTE
                                  | OPTI_TYPE_REGISTER_LIMIT;
static const u64   OPTS_TYPE      = OPTS_TYPE_STOCK_MODULE
                                  | OPTS_TYPE_PT_GENERATE_BE
                                  | OPTS_TYPE_ST_HEX
                                  | OPTS_TYPE_ST_ADD80;
static const u32   SALT_TYPE      = SALT_TYPE_EMBEDDED;
static const char *ST_PASS        = "hashcat";
static const char *ST_HASH        = "pi6a89u8tca930h8mvolklmesefc5gmn:.fnmlbsik.net:35537886:1";

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;         }

u32 module_pw_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)
{
  u32 pw_max = 63;

  if (hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL)
  {
    pw_max = 32;
  }

  return pw_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;

  hc_token_t token;

  memset (&token, 0, sizeof (hc_token_t));

  token.token_cnt  = 4;

  token.sep[0]     = ':';
  token.len[0]     = 32;
  token.attr[0]    = TOKEN_ATTR_FIXED_LENGTH;

  token.sep[1]     = ':';
  token.len_min[1] = 0;
  token.len_max[1] = (hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL) ? 32 : 256;
  token.attr[1]    = TOKEN_ATTR_VERIFY_LENGTH;

  token.sep[2]     = ':';
  token.len_min[2] = 0;
  token.len_max[2] = (hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL) ? 32 : 256;
  token.attr[2]    = TOKEN_ATTR_VERIFY_LENGTH;

  token.sep[3]     = ':';
  token.len_min[3] = 1;
  token.len_max[3] = 6;
  token.attr[3]    = TOKEN_ATTR_VERIFY_LENGTH;

  const int rc_tokenizer = input_tokenizer ((const u8 *) line_buf, line_len, &token);

  if (rc_tokenizer != PARSER_OK) return (rc_tokenizer);

  // ok, the plan for this algorithm is the following:
  // we have 2 salts here, the domain-name and a random salt
  // while both are used in the initial transformation,
  // only the random salt is used in the following iterations
  // so we create two buffer, one that includes domain-name (stored into salt_buf_pc[])
  // and one that includes only the real salt (stored into salt_buf[]).
  // the domain-name length is put into array position 7 of salt_buf_pc[] since there is not salt_pc_len

  const u8 *hash_pos = token.buf[0];
  const int hash_len = token.len[0];

  u8 tmp_buf[100] = { 0 };

  base32_decode (itoa32_to_int, hash_pos, hash_len, tmp_buf);

  memcpy (digest, tmp_buf, 20);

  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]);

  // domain

  const u8 *domain_pos = token.buf[1];
  const int domain_len = token.len[1];

  u8 *salt_buf_pc_ptr = (u8 *) salt->salt_buf_pc;

  if (domain_len > 0)
  {
    if (domain_pos[0] != '.') return (PARSER_SALT_VALUE);

    memcpy (salt_buf_pc_ptr, domain_pos, domain_len);
  }

  u8 *len_ptr = salt_buf_pc_ptr;

  *len_ptr = 0;

  for (int i = 1; i < domain_len; i++)
  {
    if (salt_buf_pc_ptr[i] == '.')
    {
      len_ptr = salt_buf_pc_ptr + i;

      *len_ptr = 0;
    }
    else
    {
      *len_ptr += 1;
    }
  }

  salt->salt_len_pc = domain_len;

  // "real" salt

  const u8 *salt_pos = token.buf[2];
  const int salt_len = token.len[2];

  const bool parse_rc = generic_salt_decode (hashconfig, salt_pos, salt_len, (u8 *) salt->salt_buf, (int *) &salt->salt_len);

  if (parse_rc == false) return (PARSER_SALT_LENGTH);

  // iteration

  const u8 *iter_pos = token.buf[3];

  salt->salt_iter = hc_strtoul ((const char *) iter_pos, NULL, 10);

  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;

  u32 tmp[5];

  tmp[0] = byte_swap_32 (digest[0]);
  tmp[1] = byte_swap_32 (digest[1]);
  tmp[2] = byte_swap_32 (digest[2]);
  tmp[3] = byte_swap_32 (digest[3]);
  tmp[4] = byte_swap_32 (digest[4]);

  char digest_buf_c[34];

  base32_encode (int_to_itoa32, (const u8 *) tmp, 20, (u8 *) digest_buf_c);

  digest_buf_c[32] = 0;

  // domain

  const u32 salt_pc_len = salt->salt_len_pc;

  char domain_buf_c[256 + 1] = { 0 };

  memcpy (domain_buf_c, (const char *) salt->salt_buf_pc, salt_pc_len);

  for (u32 i = 0; i < salt_pc_len; i++)
  {
    const char next = domain_buf_c[i];

    domain_buf_c[i] = '.';

    i += next;
  }

  domain_buf_c[salt_pc_len] = 0;

  // final

  char tmp_salt[SALT_MAX * 2];

  const int salt_len = generic_salt_encode (hashconfig, (const u8 *) salt->salt_buf, (const int) salt->salt_len, (u8 *) tmp_salt);

  tmp_salt[salt_len] = 0;

  const int line_len = snprintf (line_buf, line_size, "%s:%s:%s:%u", digest_buf_c, domain_buf_c, tmp_salt, salt->salt_iter);

  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_bridge_name              = MODULE_DEFAULT;
  module_ctx->module_bridge_type              = 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_DEFAULT;
  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_pw_max;
  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;
}
