/**
 * 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_aes.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;
static const u32   HASH_CATEGORY  = HASH_CATEGORY_OS;
static const char *HASH_NAME      = "Juniper IVE";
static const u64   KERN_TYPE      = 500;
static const u32   OPTI_TYPE      = OPTI_TYPE_ZERO_BYTE;
static const u64   OPTS_TYPE      = OPTS_TYPE_PT_GENERATE_LE
                                  | OPTS_TYPE_HASH_COPY;
static const u32   SALT_TYPE      = SALT_TYPE_EMBEDDED;
static const char *ST_PASS        = "hashcat";
static const char *ST_HASH        = "3u+UR6n8AgABAAAAHxxdXKmiOmUoqKnZlf8lTOhlPYy93EAkbPfs5+49YLFd/B1+omSKbW7DoqNM40/EeVnwJ8kYoXv9zy9D5C5m5A==";

typedef struct md5crypt_tmp
{
  u32 digest_buf[4];

} md5crypt_tmp_t;

static const u32   ROUNDS_MD5CRYPT    = 1000;
static const char *SIGNATURE_MD5CRYPT = "$1$";

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;         }

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 (md5crypt_tmp_t);

  return tmp_size;
}

static void AES128_decrypt_cbc (const u32 key[4], const u32 iv[4], const u32 in[16], u32 out[16])
{
  AES_KEY skey;

  aes128_set_decrypt_key (skey.rdk, key, (u32 *) te0, (u32 *) te1, (u32 *) te2, (u32 *) te3, (u32 *) td0, (u32 *) td1, (u32 *) td2, (u32 *) td3);

  u32 _iv[4] = { 0 };

  _iv[0] = iv[0];
  _iv[1] = iv[1];
  _iv[2] = iv[2];
  _iv[3] = iv[3];

  for (int i = 0; i < 16; i += 4)
  {
    u32 _in[4] = { 0 };
    u32 _out[4] = { 0 };

    _in[0] = in[i + 0];
    _in[1] = in[i + 1];
    _in[2] = in[i + 2];
    _in[3] = in[i + 3];

    aes128_decrypt (skey.rdk, _in, _out, (u32 *) td0, (u32 *) td1, (u32 *) td2, (u32 *) td3, (u32 *) td4);

    _out[0] ^= _iv[0];
    _out[1] ^= _iv[1];
    _out[2] ^= _iv[2];
    _out[3] ^= _iv[3];

    out[i + 0] = _out[0];
    out[i + 1] = _out[1];
    out[i + 2] = _out[2];
    out[i + 3] = _out[3];

    _iv[0] = _in[0];
    _iv[1] = _in[1];
    _iv[2] = _in[2];
    _iv[3] = _in[3];
  }
}

static void juniper_decrypt_hash (const u8 *in, const int in_len, u8 *out)
{
  // base64 decode

  u8 base64_buf[100] = { 0 };

  base64_decode (base64_to_int, (const u8 *) in, in_len, base64_buf);

  // iv stuff

  u32 juniper_iv[4] = { 0 };

  memcpy (juniper_iv, base64_buf, 12);

  memcpy (out, juniper_iv, 12);

  // reversed key

  u32 juniper_key[4] = { 0 };

  juniper_key[0] = byte_swap_32 (0xa6707a7e);
  juniper_key[1] = byte_swap_32 (0x8df91059);
  juniper_key[2] = byte_swap_32 (0xdea70ae5);
  juniper_key[3] = byte_swap_32 (0x2f9c2442);

  // AES decrypt

  u32 *in_ptr  = (u32 *) (base64_buf + 12);
  u32 *out_ptr = (u32 *) (out        + 12);

  AES128_decrypt_cbc (juniper_key, juniper_iv, in_ptr, out_ptr);
}

static void md5crypt_decode (u8 digest[16], const u8 buf[22])
{
  int l;

  l  = itoa64_to_int (buf[ 0]) <<  0;
  l |= itoa64_to_int (buf[ 1]) <<  6;
  l |= itoa64_to_int (buf[ 2]) << 12;
  l |= itoa64_to_int (buf[ 3]) << 18;

  digest[ 0] = (l >> 16) & 0xff;
  digest[ 6] = (l >>  8) & 0xff;
  digest[12] = (l >>  0) & 0xff;

  l  = itoa64_to_int (buf[ 4]) <<  0;
  l |= itoa64_to_int (buf[ 5]) <<  6;
  l |= itoa64_to_int (buf[ 6]) << 12;
  l |= itoa64_to_int (buf[ 7]) << 18;

  digest[ 1] = (l >> 16) & 0xff;
  digest[ 7] = (l >>  8) & 0xff;
  digest[13] = (l >>  0) & 0xff;

  l  = itoa64_to_int (buf[ 8]) <<  0;
  l |= itoa64_to_int (buf[ 9]) <<  6;
  l |= itoa64_to_int (buf[10]) << 12;
  l |= itoa64_to_int (buf[11]) << 18;

  digest[ 2] = (l >> 16) & 0xff;
  digest[ 8] = (l >>  8) & 0xff;
  digest[14] = (l >>  0) & 0xff;

  l  = itoa64_to_int (buf[12]) <<  0;
  l |= itoa64_to_int (buf[13]) <<  6;
  l |= itoa64_to_int (buf[14]) << 12;
  l |= itoa64_to_int (buf[15]) << 18;

  digest[ 3] = (l >> 16) & 0xff;
  digest[ 9] = (l >>  8) & 0xff;
  digest[15] = (l >>  0) & 0xff;

  l  = itoa64_to_int (buf[16]) <<  0;
  l |= itoa64_to_int (buf[17]) <<  6;
  l |= itoa64_to_int (buf[18]) << 12;
  l |= itoa64_to_int (buf[19]) << 18;

  digest[ 4] = (l >> 16) & 0xff;
  digest[10] = (l >>  8) & 0xff;
  digest[ 5] = (l >>  0) & 0xff;

  l  = itoa64_to_int (buf[20]) <<  0;
  l |= itoa64_to_int (buf[21]) <<  6;

  digest[11] = (l >>  0) & 0xff;
}

/* uses OPTS_TYPE_HASH_COPY
static void md5crypt_encode (const u8 digest[16], u8 buf[22])
{
  int l;

  l = (digest[ 0] << 16) | (digest[ 6] << 8) | (digest[12] << 0);

  buf[ 0] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[ 1] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[ 2] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[ 3] = int_to_itoa64 (l & 0x3f); //l >>= 6;

  l = (digest[ 1] << 16) | (digest[ 7] << 8) | (digest[13] << 0);

  buf[ 4] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[ 5] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[ 6] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[ 7] = int_to_itoa64 (l & 0x3f); //l >>= 6;

  l = (digest[ 2] << 16) | (digest[ 8] << 8) | (digest[14] << 0);

  buf[ 8] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[ 9] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[10] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[11] = int_to_itoa64 (l & 0x3f); //l >>= 6;

  l = (digest[ 3] << 16) | (digest[ 9] << 8) | (digest[15] << 0);

  buf[12] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[13] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[14] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[15] = int_to_itoa64 (l & 0x3f); //l >>= 6;

  l = (digest[ 4] << 16) | (digest[10] << 8) | (digest[ 5] << 0);

  buf[16] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[17] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[18] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[19] = int_to_itoa64 (l & 0x3f); //l >>= 6;

  l = (digest[11] << 0);

  buf[20] = int_to_itoa64 (l & 0x3f); l >>= 6;
  buf[21] = int_to_itoa64 (l & 0x3f); //l >>= 6;
}
*/

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)
{
  const bool optimized_kernel = (hashconfig->opti_type & OPTI_TYPE_OPTIMIZED_KERNEL);

  const u32 pw_max = (optimized_kernel == true) ? 15 : PW_MAX;

  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;

  token_t token;

  token.token_cnt  = 1;

  token.len_min[0] = 104;
  token.len_max[0] = 104;
  token.attr[0]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_BASE64A;

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

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

  u8 decrypted[76] = { 0 }; // iv + hash

  juniper_decrypt_hash (token.buf[0], token.len[0], decrypted);

  // from here we are parsing a normal md5crypt hash

  u8 *md5crypt_hash = decrypted + 12;

  token_t token2;

  token2.token_cnt  = 3;

  token2.signatures_cnt    = 1;
  token2.signatures_buf[0] = SIGNATURE_MD5CRYPT;

  token2.len[0]     = 3;
  token2.attr[0]    = TOKEN_ATTR_FIXED_LENGTH
                    | TOKEN_ATTR_VERIFY_SIGNATURE;

  token2.len_min[1] = 8;
  token2.len_max[1] = 8;
  token2.sep[1]     = '$';
  token2.attr[1]    = TOKEN_ATTR_VERIFY_LENGTH;

  token2.len[2]     = 22;
  token2.attr[2]    = TOKEN_ATTR_FIXED_LENGTH
                    | TOKEN_ATTR_VERIFY_BASE64B;

  const int rc_tokenizer2 = input_tokenizer (md5crypt_hash, 34, &token2);

  if (rc_tokenizer2 != PARSER_OK) return (rc_tokenizer2);

  static const char *danastre = "danastre";

  if (memcmp (token2.buf[1], danastre, 8) != 0) return (PARSER_SALT_VALUE);

  salt->salt_iter = ROUNDS_MD5CRYPT;

  const u8 *salt_pos = token2.buf[1];
  const int salt_len = token2.len[1];

  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);

  const u8 *hash_pos = token2.buf[2];

  md5crypt_decode ((u8 *) digest, hash_pos);

  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 int line_len = snprintf (line_buf, line_size, "%s", hash_info->orighash);

  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_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_DEFAULT;
  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_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_tmp_size;
  module_ctx->module_unstable_warning         = MODULE_DEFAULT;
  module_ctx->module_warmup_disable           = MODULE_DEFAULT;
}