/**
 * 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;
static const u32   HASH_CATEGORY  = HASH_CATEGORY_PASSWORD_MANAGER;
static const char *HASH_NAME      = "Bitcoin/Litecoin wallet.dat";
static const u32   HASH_TYPE      = HASH_TYPE_GENERIC;
static const u64   KERN_TYPE      = 11300;
static const u32   OPTI_TYPE      = OPTI_TYPE_ZERO_BYTE
                                  | OPTI_TYPE_USES_BITS_64
                                  | OPTI_TYPE_SLOW_HASH_SIMD_LOOP;
static const u64   OPTS_TYPE      = OPTS_TYPE_STATE_BUFFER_LE
                                  | OPTS_TYPE_PT_GENERATE_LE
                                  | 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        = "$bitcoin$96$c265931309b4a59307921cf054b4ec6b6e4554369be79802e94e16477645777d948ae1d375191831efc78e5acd1f0443$16$8017214013543185$200460$96$480008005625057442352316337722323437108374245623701184230273883222762730232857701607167815448714$66$014754433300175043011633205413774877455616682000536368706315333388";

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;       }
u32         module_hash_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 HASH_TYPE;       }
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 bitcoin_wallet
{
  u32 cry_master_buf[64];
  u32 ckey_buf[64];
  u32 public_key_buf[64];

  u32 cry_master_len;
  u32 ckey_len;
  u32 public_key_len;

} bitcoin_wallet_t;

typedef struct bitcoin_wallet_tmp
{
  u64 dgst[8];

} bitcoin_wallet_tmp_t;

static const char *SIGNATURE_BITCOIN_WALLET = "$bitcoin$";

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 (bitcoin_wallet_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 (bitcoin_wallet_tmp_t);

  return tmp_size;
}

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)
{
  // this overrides the reductions of PW_MAX in case optimized kernel is selected
  // IOW, even in optimized kernel mode it support length 256

  const u32 pw_max = 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;

  bitcoin_wallet_t *bitcoin_wallet = (bitcoin_wallet_t *) esalt_buf;

  token_t token;

  token.token_cnt  = 10;

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

  token.len[0]     = 9;
  token.attr[0]    = TOKEN_ATTR_FIXED_LENGTH
                   | TOKEN_ATTR_VERIFY_SIGNATURE;

  token.sep[1]     = '$';
  token.len_min[1] = 2;
  token.len_max[1] = 2;
  token.attr[1]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_DIGIT;

  token.sep[2]     = '$';
  token.len_min[2] = 16;
  token.len_max[2] = 256;
  token.attr[2]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[3]     = '$';
  token.len_min[3] = 2;
  token.len_max[3] = 2;
  token.attr[3]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_DIGIT;

  token.sep[4]     = '$';
  token.len_min[4] = 16;
  token.len_max[4] = 16;
  token.attr[4]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  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_min[6] = 2;
  token.len_max[6] = 2;
  token.attr[6]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_DIGIT;

  token.sep[7]     = '$';
  token.len_min[7] = 96;
  token.len_max[7] = 96;
  token.attr[7]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.sep[8]     = '$';
  token.len_min[8] = 1;
  token.len_max[8] = 3;
  token.attr[8]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_DIGIT;

  token.sep[9]     = '$';
  token.len_min[9] = 2;
  token.len_max[9] = 512;
  token.attr[9]    = 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);

  const u8 *cry_master_len_pos  = token.buf[1];
  const u8 *cry_master_buf_pos  = token.buf[2];
  const u8 *cry_salt_len_pos    = token.buf[3];
  const u8 *cry_salt_buf_pos    = token.buf[4];
  const u8 *cry_rounds_pos      = token.buf[5];
  const u8 *ckey_len_pos        = token.buf[6];
  const u8 *ckey_buf_pos        = token.buf[7];
  const u8 *public_key_len_pos  = token.buf[8];
  const u8 *public_key_buf_pos  = token.buf[9];

  const int cry_master_buf_len  = token.len[2];
  const int cry_salt_buf_len    = token.len[4];
  const int ckey_buf_len        = token.len[7];
  const int public_key_buf_len  = token.len[9];

  // verify

  const int cry_master_len = hc_strtoul ((const char *) cry_master_len_pos, NULL, 10);
  const int cry_salt_len   = hc_strtoul ((const char *) cry_salt_len_pos,   NULL, 10);
  const int ckey_len       = hc_strtoul ((const char *) ckey_len_pos,       NULL, 10);
  const int public_key_len = hc_strtoul ((const char *) public_key_len_pos, NULL, 10);

  if (cry_master_buf_len != cry_master_len) return (PARSER_SALT_VALUE);
  if (cry_salt_buf_len   != cry_salt_len)   return (PARSER_SALT_VALUE);
  if (ckey_buf_len       != ckey_len)       return (PARSER_SALT_VALUE);
  if (public_key_buf_len != public_key_len) return (PARSER_SALT_VALUE);

  if (cry_master_len % 16) return (PARSER_SALT_VALUE);

  // esalt

  for (int i = 0, j = 0; j < cry_master_len; i += 1, j += 8)
  {
    bitcoin_wallet->cry_master_buf[i] = hex_to_u32 ((const u8 *) &cry_master_buf_pos[j]);
  }

  for (int i = 0, j = 0; j < ckey_len; i += 1, j += 8)
  {
    bitcoin_wallet->ckey_buf[i] = hex_to_u32 ((const u8 *) &ckey_buf_pos[j]);
  }

  for (int i = 0, j = 0; j < public_key_len; i += 1, j += 8)
  {
    bitcoin_wallet->public_key_buf[i] = hex_to_u32 ((const u8 *) &public_key_buf_pos[j]);
  }

  bitcoin_wallet->cry_master_len = cry_master_len / 2;
  bitcoin_wallet->ckey_len       = ckey_len / 2;
  bitcoin_wallet->public_key_len = public_key_len / 2;

  // hash

  digest[0] = bitcoin_wallet->cry_master_buf[0];
  digest[1] = bitcoin_wallet->cry_master_buf[1];
  digest[2] = bitcoin_wallet->cry_master_buf[2];
  digest[3] = bitcoin_wallet->cry_master_buf[3];

  // iter

  const int cry_rounds = hc_strtoul ((const char *) cry_rounds_pos, NULL, 10);

  salt->salt_iter = cry_rounds - 1;

  // salt

  const bool parse_rc = parse_and_store_generic_salt ((u8 *) salt->salt_buf, (int *) &salt->salt_len, cry_salt_buf_pos, cry_salt_buf_len, hashconfig);

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

  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)
{
  bitcoin_wallet_t *bitcoin_wallet = (bitcoin_wallet_t *) esalt_buf;

  const u32 cry_master_len = bitcoin_wallet->cry_master_len;
  const u32 ckey_len       = bitcoin_wallet->ckey_len;
  const u32 public_key_len = bitcoin_wallet->public_key_len;

  char *cry_master_buf = (char *) hcmalloc ((cry_master_len * 2) + 1);
  char *ckey_buf       = (char *) hcmalloc ((ckey_len * 2)       + 1);
  char *public_key_buf = (char *) hcmalloc ((public_key_len * 2) + 1);

  for (u32 i = 0, j = 0; i < cry_master_len; i += 1, j += 2)
  {
    const u8 *ptr = (const u8 *) bitcoin_wallet->cry_master_buf;

    sprintf (cry_master_buf + j, "%02x", ptr[i]);
  }

  for (u32 i = 0, j = 0; i < ckey_len; i += 1, j += 2)
  {
    const u8 *ptr = (const u8 *) bitcoin_wallet->ckey_buf;

    sprintf (ckey_buf + j, "%02x", ptr[i]);
  }

  for (u32 i = 0, j = 0; i < public_key_len; i += 1, j += 2)
  {
    const u8 *ptr = (const u8 *) bitcoin_wallet->public_key_buf;

    sprintf (public_key_buf + j, "%02x", ptr[i]);
  }

  const int line_len = snprintf (line_buf, line_size, "%s%u$%s$%u$%08x%08x$%u$%u$%s$%u$%s",
    SIGNATURE_BITCOIN_WALLET,
    cry_master_len * 2,
    cry_master_buf,
    salt->salt_len * 2,
    byte_swap_32 (salt->salt_buf[0]),
    byte_swap_32 (salt->salt_buf[1]),
    salt->salt_iter + 1,
    ckey_len * 2,
    ckey_buf,
    public_key_len * 2,
    public_key_buf
  );

  hcfree (cry_master_buf);
  hcfree (ckey_buf);
  hcfree (public_key_buf);

  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_outfile      = 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              = 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_hash_type                = module_hash_type;
  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_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_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;
}