/**
 * 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"

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; // actually only DGST_SIZE_4_1
static const u32   HASH_CATEGORY  = HASH_CATEGORY_ARCHIVE;
static const char *HASH_NAME      = "RAR3-p (Uncompressed)";
static const u64   KERN_TYPE      = 23700;
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_POST_AMP_UTF16LE;
static const u32   SALT_TYPE      = SALT_TYPE_EMBEDDED;
static const char *ST_PASS        = "hashcat";
static const char *ST_HASH        = "$RAR3$*1*e54a73729887cb53*49b0a846*16*14*1*34620bcca8176642a210b1051901921e*30";

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 rar3
{
  u32 data[81920];

  u32 pack_size;
  u32 unpack_size;

} rar3_t;

typedef struct rar3_tmp
{
  u32 dgst[5];

  u32 w[66]; // 256 byte pass + 8 byte salt

  u32 iv[4];

} rar3_tmp_t;

typedef struct rar3_tmp_optimized
{
  u32 dgst[17][5];

} rar3_tmp_optimized_t;

static const int   ROUNDS_RAR3    = 262144;
static const char *SIGNATURE_RAR3 = "$RAR3$";

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 bool optimized_kernel = user_options->optimized_kernel;

  u64 tmp_size = (u64) sizeof (rar3_tmp_t);

  if (optimized_kernel == true)
  {
    tmp_size = (u64) sizeof (rar3_tmp_optimized_t);
  }

  return tmp_size;
}

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)
{
  u64 esalt_size = (u64) sizeof (rar3_t);

  return esalt_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)
{
  const u32 kernel_loops_min = ROUNDS_RAR3 / 16;

  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 = ROUNDS_RAR3 / 16;

  return kernel_loops_max;
}

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);

  u32 pw_max = 128;

  if (optimized_kernel == true)
  {
    pw_max = 20;
  }

  return pw_max;
}

const char *module_benchmark_mask (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 char *mask = "?l?l?l?l?l";

  return mask;
}

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;

  rar3_t *rar3 = (rar3_t *) esalt_buf;

  hc_token_t token;

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

  token.token_cnt  = 9;

  token.signatures_cnt    = 1;
  token.signatures_buf[0] = SIGNATURE_RAR3;

  token.sep[0]     = '*';
  token.len[0]     = 6;
  token.attr[0]    = TOKEN_ATTR_FIXED_LENGTH
                   | TOKEN_ATTR_VERIFY_SIGNATURE;

  token.sep[1]     = '*';
  token.len[1]     = 1;
  token.attr[1]    = TOKEN_ATTR_FIXED_LENGTH
                   | TOKEN_ATTR_VERIFY_DIGIT;

  token.sep[2]     = '*';
  token.len[2]     = 16;
  token.attr[2]    = TOKEN_ATTR_FIXED_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[3]     = '*';
  token.len[3]     = 8;
  token.attr[3]    = TOKEN_ATTR_FIXED_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[4]     = '*';
  token.len_min[4] = 1;
  token.len_max[4] = 7;
  token.attr[4]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_DIGIT;

  token.sep[5]     = '*';
  token.len_min[5] = 1;
  token.len_max[5] = 6;
  token.attr[5]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_DIGIT;

  token.sep[6]     = '*';
  token.len[6]     = 1;
  token.attr[6]    = TOKEN_ATTR_FIXED_LENGTH
                   | TOKEN_ATTR_VERIFY_DIGIT;

  token.sep[7]     = '*';
  token.len_min[7] = 2;
  token.len_max[7] = 655056;
  token.attr[7]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.len[8]     = 2;
  token.attr[8]    = TOKEN_ATTR_FIXED_LENGTH
                   | TOKEN_ATTR_VERIFY_DIGIT;

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

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

  const u8 *type_pos    = token.buf[1];

  if (type_pos[0] != '1') return (PARSER_SIGNATURE_UNMATCHED);

  // salt

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

  salt->salt_buf[0] = hex_to_u32 (salt_pos + 0);
  salt->salt_buf[1] = hex_to_u32 (salt_pos + 8);

  salt->salt_len  = 8;
  salt->salt_iter = ROUNDS_RAR3;

  // CRC32

  const u8 *crc32_pos = token.buf[3];

  u32 crc32_sum = hex_to_u32 (crc32_pos);

  // pack size

  const u8 *pack_size_pos = token.buf[4];

  const u32 pack_size = hc_strtoul ((const char *) pack_size_pos, NULL, 10);

  if (pack_size <      1) return (PARSER_SALT_VALUE);
  if (pack_size > 327680) return (PARSER_SALT_VALUE);

  if ((pack_size % 16) != 0) return (PARSER_SALT_VALUE);

  rar3->pack_size = pack_size;

  // unpack size

  const u8 *unpack_size_pos = token.buf[5];

  const u32 unpack_size = hc_strtoul ((const char *) unpack_size_pos, NULL, 10);

  if (unpack_size <      1) return (PARSER_SALT_VALUE);
  if (unpack_size > 655360) return (PARSER_SALT_VALUE);

  if (unpack_size > pack_size) return (PARSER_SALT_VALUE);

  rar3->unpack_size = unpack_size;

  // data is within the hash line

  const u8 *is_data_pos = token.buf[6];

  if (is_data_pos[0] != '1') return (PARSER_SALT_VALUE);

  // data

  const u8 *data_pos = token.buf[7];
  const u32 data_len = token.len[7];

  if (data_len != (pack_size * 2)) return (PARSER_SALT_VALUE);

  // like hex decode, but swapped:
  // hex_decode (data_pos, data_len, (u8 *) rar3->data);

  for (u32 i = 0, j = 0; i < data_len; i += 8, j++)
  {
    rar3->data[j] = hex_to_u32 (data_pos + i);

    rar3->data[j] = byte_swap_32 (rar3->data[j]);
  }

  // method

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

  const u32 method = hc_strtoul ((const char *) method_pos, NULL, 10);

  if (method != 30) return (PARSER_SALT_VALUE);

  // digest

  digest[0] = crc32_sum ^ 0xffffffff;
  digest[1] = 0;
  digest[2] = 0;
  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;
  const rar3_t *rar3   = (const rar3_t *) esalt_buf;

  const u32 data_len = rar3->pack_size;

  u8 *data = (u8 *) hcmalloc ((data_len * 2) + 1);

  // like hex encode, but swapped:
  // hex_encode ((const u8 *) rar3->data, rar3->pack_size, data);

  for (u32 i = 0, j = 0; i < data_len / 4; i += 1, j += 8)
  {
    const u32 d = byte_swap_32 (rar3->data[i]);

    u32_to_hex (d, data + j);
  }

  data[data_len * 2] = 0;

  const int line_len = snprintf (line_buf, line_size, "%s*1*%08x%08x*%08x*%u*%u*1*%s*30",
      SIGNATURE_RAR3,
      byte_swap_32 (salt->salt_buf[0]),
      byte_swap_32 (salt->salt_buf[1]),
      byte_swap_32 (digest[0]) ^ 0xffffffff,
      rar3->pack_size,
      rar3->unpack_size,
      data);

  hcfree (data);

  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_benchmark_mask;
  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_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;
}