/**
 * 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      = 0;
static const u32   DGST_POS1      = 3;
static const u32   DGST_POS2      = 2;
static const u32   DGST_POS3      = 1;
static const u32   DGST_SIZE      = DGST_SIZE_4_4;
static const u32   HASH_CATEGORY  = HASH_CATEGORY_NETWORK_PROTOCOL;
static const char *HASH_NAME      = "IKE-PSK MD5";
static const u64   KERN_TYPE      = 5300;
static const u32   OPTI_TYPE      = OPTI_TYPE_ZERO_BYTE;
static const u64   OPTS_TYPE      = OPTS_TYPE_STOCK_MODULE
                                  | OPTS_TYPE_PT_GENERATE_LE
                                  | OPTS_TYPE_ST_ADD80;
static const u32   SALT_TYPE      = SALT_TYPE_EMBEDDED;
static const char *ST_PASS        = "hashcat";
static const char *ST_HASH        = "50503326cac6e4bd892b8257805b5a59a285f464ad3f63dc01bd0335f8341ef52e00be0b8cb205422a3788f021e4e6e8ccbe34784bc85abe42f62545bac64888426a2f1264fa28cf384ff00b14cfa5eff562dda4fad2a31fd7a6715218cff959916deed856feea5bee2e773241c5fbebf202958f0ce0c432955e0f1f6d1259da:688a7bfa8d5819630a970ed6d27018021a15fbb3e2fdcc36ce9b563d8ff95f510c4b3236c014d1cde9c2f1a999b121bc3ab1bc8049c8ac1e8c167a84f53c867492723eb01ab4b38074b38f4297d6fea8f44e01ea828fce33c433430938b1551f60673ce8088e7d2f41e3b49315344046fefee1e3860064331417562761db3ba4:c66606d691eaade4:8bdc88a2cdb4a1cf:c3b13137fae9f66684d98709939e5c3454ee31a98c80a1c76427d805b5dea866eff045515e8fb42dd259b9448caba9d937f4b3b75ec1b092a92232b4c8c1e70a60a52076e907f887b731d0f66e19e09b535238169c74c04a4b393f9b815c54eef4558cd8a22c9018bb4f24ee6db0e32979f9a353361cdba948f9027551ee40b1c96ba81c28aa3e1a0fac105dc469efa83f6d3ee281b945c6fa8b4677bac26dda:53f757c5b08afad6:aa02d9289e1702e5d7ed1e4ebf35ab31c2688e00:aab8580015cf545ac0b7291d15a4f2c79e06defd:944a0df3939f3bd281c9d05fbc0e3d30";

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 ikepsk
{
  u32 nr_buf[16];
  u32 nr_len;

  u32 msg_buf[128];
  u32 msg_len[6];

} ikepsk_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 (ikepsk_t);

  return esalt_size;
}

bool module_hlfmt_disable (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 bool hlfmt_disable = true;

  return hlfmt_disable;
}

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;

  ikepsk_t *ikepsk = (ikepsk_t *) esalt_buf;

  hc_token_t token;

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

  token.token_cnt = 9;

  token.sep[0]     = ':';
  token.len_min[0] = 0;
  token.len_max[0] = 1024;
  token.attr[0]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[1]     = ':';
  token.len_min[1] = 0;
  token.len_max[1] = 1024;
  token.attr[1]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[2]     = ':';
  token.len_min[2] = 0;
  token.len_max[2] = 1024;
  token.attr[2]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[3]     = ':';
  token.len_min[3] = 0;
  token.len_max[3] = 1024;
  token.attr[3]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[4]     = ':';
  token.len_min[4] = 0;
  token.len_max[4] = 1024;
  token.attr[4]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[5]     = ':';
  token.len_min[5] = 0;
  token.len_max[5] = 1024;
  token.attr[5]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[6]     = ':';
  token.len_min[6] = 0;
  token.len_max[6] = 128;
  token.attr[6]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[7]     = ':';
  token.len_min[7] = 0;
  token.len_max[7] = 128;
  token.attr[7]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[8]     = ':';
  token.len[8]     = 32;
  token.attr[8]    = 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);

  ikepsk->msg_len[0] =                      token.len[0] / 2;
  ikepsk->msg_len[1] = ikepsk->msg_len[0] + token.len[1] / 2;
  ikepsk->msg_len[2] = ikepsk->msg_len[1] + token.len[2] / 2;
  ikepsk->msg_len[3] = ikepsk->msg_len[2] + token.len[3] / 2;
  ikepsk->msg_len[4] = ikepsk->msg_len[3] + token.len[4] / 2;
  ikepsk->msg_len[5] = ikepsk->msg_len[4] + token.len[5] / 2;
  ikepsk->nr_len  = (token.len[6] + token.len[7]) / 2;

  if (ikepsk->msg_len[5] > 512) return (PARSER_SALT_LENGTH);
  if (ikepsk->nr_len  > 64)  return (PARSER_SALT_LENGTH);

  u8 *ptr1 = (u8 *) ikepsk->msg_buf;
  u8 *ptr2 = (u8 *) ikepsk->nr_buf;

  for (int i = 0; i < token.len[0]; i += 2) *ptr1++ = hex_to_u8 (token.buf[0] + i);
  for (int i = 0; i < token.len[1]; i += 2) *ptr1++ = hex_to_u8 (token.buf[1] + i);
  for (int i = 0; i < token.len[2]; i += 2) *ptr1++ = hex_to_u8 (token.buf[2] + i);
  for (int i = 0; i < token.len[3]; i += 2) *ptr1++ = hex_to_u8 (token.buf[3] + i);
  for (int i = 0; i < token.len[4]; i += 2) *ptr1++ = hex_to_u8 (token.buf[4] + i);
  for (int i = 0; i < token.len[5]; i += 2) *ptr1++ = hex_to_u8 (token.buf[5] + i);
  for (int i = 0; i < token.len[6]; i += 2) *ptr2++ = hex_to_u8 (token.buf[6] + i);
  for (int i = 0; i < token.len[7]; i += 2) *ptr2++ = hex_to_u8 (token.buf[7] + i);

  *ptr1++ = 0x80;
  *ptr2++ = 0x80;

  /**
   * Store to database
   */

  const u8 *hash_pos = token.buf[8];

  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);

  salt->salt_len = 32;

  salt->salt_buf[0] = ikepsk->nr_buf[0];
  salt->salt_buf[1] = ikepsk->nr_buf[1];
  salt->salt_buf[2] = ikepsk->nr_buf[2];
  salt->salt_buf[3] = ikepsk->nr_buf[3];
  salt->salt_buf[4] = ikepsk->nr_buf[4];
  salt->salt_buf[5] = ikepsk->nr_buf[5];
  salt->salt_buf[6] = ikepsk->nr_buf[6];
  salt->salt_buf[7] = ikepsk->nr_buf[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 u32 *digest = (const u32 *) digest_buf;

  const ikepsk_t *ikepsk = (const ikepsk_t *) esalt_buf;

  int line_len = 0;

  // msg_buf

  const u32 ikepsk_msg_len = ikepsk->msg_len[5] / 4;

  for (u32 i = 0; i < ikepsk_msg_len; i++)
  {
    if ((i == ikepsk->msg_len[0] / 4) || (i == ikepsk->msg_len[1] / 4) || (i == ikepsk->msg_len[2] / 4) || (i == ikepsk->msg_len[3] / 4) || (i == ikepsk->msg_len[4] / 4))
    {
      line_len += snprintf (line_buf + line_len, line_size - line_len, ":");
    }

    line_len += snprintf (line_buf + line_len, line_size - line_len, "%08x", byte_swap_32 (ikepsk->msg_buf[i]));
  }

  // nr_buf

  const u32 ikepsk_nr_len = ikepsk->nr_len / 4;

  for (u32 i = 0; i < ikepsk_nr_len; i++)
  {
    if ((i == 0) || (i == 5))
    {
      line_len += snprintf (line_buf + line_len, line_size - line_len, ":");
    }

    line_len += snprintf (line_buf + line_len, line_size - line_len, "%08x", byte_swap_32 (ikepsk->nr_buf[i]));
  }

  // digest_buf

  for (u32 i = 0; i < 4; i++)
  {
    if (i == 0)
    {
      line_len += snprintf (line_buf + line_len, line_size - line_len, ":");
    }

    line_len += snprintf (line_buf + line_len, line_size - line_len, "%08x", byte_swap_32 (digest[i]));
  }

  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_hlfmt_disable;
  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_DEFAULT;
  module_ctx->module_unstable_warning         = MODULE_DEFAULT;
  module_ctx->module_warmup_disable           = MODULE_DEFAULT;
}