/**
 * 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_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_8;
static const u32   HASH_CATEGORY  = HASH_CATEGORY_PASSWORD_MANAGER;
static const char *HASH_NAME      = "Ethereum Pre-Sale Wallet, PBKDF2-HMAC-SHA256";
static const u64   KERN_TYPE      = 16300;
static const u32   OPTI_TYPE      = OPTI_TYPE_ZERO_BYTE
                                  | OPTI_TYPE_SLOW_HASH_SIMD_LOOP;
static const u64   OPTS_TYPE      = OPTS_TYPE_PT_GENERATE_LE
                                  | OPTS_TYPE_ST_HEX;
static const u32   SALT_TYPE      = SALT_TYPE_EMBEDDED;
static const char *ST_PASS        = "hashcat";
static const char *ST_HASH        = "$ethereum$w*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*f3abede76ac15228f1b161dd9660bb9094e81b1b*d201ccd492c284484c7824c4d37b1593";

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 ethereum_presale
{
  u32 iv[4];
  u32 enc_seed[152];
  u32 enc_seed_len;

} ethereum_presale_t;

typedef struct pbkdf2_sha256_tmp
{
  u32  ipad[8];
  u32  opad[8];

  u32  dgst[32];
  u32  out[32];

} pbkdf2_sha256_tmp_t;

static const char *SIGNATURE_ETHEREUM_PRESALE = "$ethereum$w";
static const int   ROUNDS_ETHEREUM_PRESALE    = 2000;

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 (ethereum_presale_t);

  return esalt_size;
}

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 (pbkdf2_sha256_tmp_t);

  return tmp_size;
}

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;

  if (device_param->is_cuda == true)
  {
    hc_asprintf (&jit_build_options, "-D NO_UNROLL");
  }

  if (device_param->opencl_device_vendor_id == VENDOR_ID_NV)
  {
    hc_asprintf (&jit_build_options, "-D NO_UNROLL");
  }

  if ((device_param->opencl_device_vendor_id == VENDOR_ID_AMD) && (device_param->has_vperm == false))
  {
    hc_asprintf (&jit_build_options, "-D NO_UNROLL");
  }

  return jit_build_options;
}

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;

  ethereum_presale_t *ethereum_presale = (ethereum_presale_t *) esalt_buf;

  token_t token;

  token.token_cnt  = 4;

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

  token.sep[0]     = '*';
  token.len_min[0] = 11;
  token.len_max[0] = 11;
  token.attr[0]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_SIGNATURE;

  token.sep[1]     = '*';
  token.len_min[1] = 64;
  token.len_max[1] = 1248;
  token.attr[1]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[2]     = '*';
  token.len_min[2] = 40;
  token.len_max[2] = 40;
  token.attr[2]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[3]     = '*';
  token.len_min[3] = 32;
  token.len_max[3] = 32;
  token.attr[3]    = 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);

  // encseed

  const u8 *encseed_pos = token.buf[1];
  const int encseed_len = token.len[1];

  ethereum_presale->iv[0] = hex_to_u32 ((const u8 *) &encseed_pos[ 0]);
  ethereum_presale->iv[1] = hex_to_u32 ((const u8 *) &encseed_pos[ 8]);
  ethereum_presale->iv[2] = hex_to_u32 ((const u8 *) &encseed_pos[16]);
  ethereum_presale->iv[3] = hex_to_u32 ((const u8 *) &encseed_pos[24]);

  ethereum_presale->iv[0] = byte_swap_32 (ethereum_presale->iv[0]);
  ethereum_presale->iv[1] = byte_swap_32 (ethereum_presale->iv[1]);
  ethereum_presale->iv[2] = byte_swap_32 (ethereum_presale->iv[2]);
  ethereum_presale->iv[3] = byte_swap_32 (ethereum_presale->iv[3]);

  u32 *esalt_buf_ptr = ethereum_presale->enc_seed;

  for (int i = 32, j = 0; i < encseed_len; i += 8, j++)
  {
    esalt_buf_ptr[j] = hex_to_u32 ((const u8 *) &encseed_pos[i]);

    esalt_buf_ptr[j] = byte_swap_32 (esalt_buf_ptr[j]);
  }

  ethereum_presale->enc_seed_len = (encseed_len - 32) / 2; // encseed length without IV (raw bytes, not hex)

  // salt (address)

  const u8 *ethaddr_pos = token.buf[2];
  const int ethaddr_len = token.len[2];

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

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

  salt->salt_iter = ROUNDS_ETHEREUM_PRESALE - 1;

  // hash (bkp)

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

  digest[0] = hex_to_u32 ((const u8 *) &bkp_pos[ 0]);
  digest[1] = hex_to_u32 ((const u8 *) &bkp_pos[ 8]);
  digest[2] = hex_to_u32 ((const u8 *) &bkp_pos[16]);
  digest[3] = hex_to_u32 ((const u8 *) &bkp_pos[24]);

  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 ethereum_presale_t *ethereum_presale = (const ethereum_presale_t *) esalt_buf;

  // get the initialization vector:

  u8 encseed[1248 + 1] = { 0 };

  u32 iv[4];

  iv[0] = byte_swap_32 (ethereum_presale->iv[0]);
  iv[1] = byte_swap_32 (ethereum_presale->iv[1]);
  iv[2] = byte_swap_32 (ethereum_presale->iv[2]);
  iv[3] = byte_swap_32 (ethereum_presale->iv[3]);

  u32_to_hex (iv[0], encseed +  0);
  u32_to_hex (iv[1], encseed +  8);
  u32_to_hex (iv[2], encseed + 16);
  u32_to_hex (iv[3], encseed + 24);

  // get the raw enc_seed (without iv):

  const u32 *enc_seed_ptr = (const u32 *) ethereum_presale->enc_seed;

  for (u32 i = 0, j = 32; i < ethereum_presale->enc_seed_len / 4; i++, j += 8)
  {
    u32 tmp = enc_seed_ptr[i];

    tmp = byte_swap_32 (tmp);

    u32_to_hex (tmp, encseed + j);
  }

  const u32 max_hex_len = (16 + ethereum_presale->enc_seed_len) * 2; // 16 bytes IV + encrypted seed (in hex)

  const u32 max_pos = MIN (sizeof (encseed) - 1, max_hex_len);

  encseed[max_pos] = 0;

  // salt:

  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;

  // output:

  const int line_len = snprintf (line_buf, line_size, "%s*%s*%s*%08x%08x%08x%08x",
    SIGNATURE_ETHEREUM_PRESALE,
    encseed,
    tmp_salt,
    byte_swap_32 (digest[0]),
    byte_swap_32 (digest[1]),
    byte_swap_32 (digest[2]),
    byte_swap_32 (digest[3])
  );

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