text: /**
   * 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_64;
  static const u32   HASH_CATEGORY  = HASH_CATEGORY_FRAMEWORK;
  static const char *HASH_NAME      = "Python passlib pbkdf2-sha256";
  static const u64   KERN_TYPE      = 10900;
  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;
  static const u32   SALT_TYPE      = SALT_TYPE_EMBEDDED;
  static const char *ST_PASS        = "hashcat";
  static const char *ST_HASH        = "$pbkdf2-sha256$29000$x9h7j/Ge8x6DMEao1VqrdQ$kra3R1wEnY8mPdDWOpTqOTINaAmZvRMcYd8u5OBQP9A";
  
  static const u32   HASH_LEN_RAW   = 32;
  static const u32   HASH_LEN_B64   = 43;
  
  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 pbkdf2_sha256
  {
    u32 salt_buf[64];
  
  } pbkdf2_sha256_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_PASSLIB_PBKDF2_SHA256 = "pbkdf2-sha256";
  
  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 (pbkdf2_sha256_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;
  }
  
  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 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;
  
    pbkdf2_sha256_t *pbkdf2_sha256 = (pbkdf2_sha256_t *) esalt_buf;
  
    token_t token;
  
    token.token_cnt  = 5;
  
    token.signatures_cnt    = 1;
    token.signatures_buf[0] = SIGNATURE_PASSLIB_PBKDF2_SHA256;
  
    // the hash starts with a $
    token.sep[0]     = '$';
    token.len_min[0] = 0;
    token.len_max[0] = 0;
    token.attr[0]    = TOKEN_ATTR_VERIFY_LENGTH;
  
    token.sep[1]     = '$';
    token.len_min[1] = 13;
    token.len_max[1] = 13;
    token.attr[1]    = TOKEN_ATTR_VERIFY_LENGTH
                     | TOKEN_ATTR_VERIFY_SIGNATURE;
  
    // iterations in decimal representation
    token.sep[2]     = '$';
    token.len_min[2] = 1;
    token.len_max[2] = 6;
    token.attr[2]    = TOKEN_ATTR_VERIFY_LENGTH
                     | TOKEN_ATTR_VERIFY_DIGIT;
  
    // salt in alternate base64 repretentation
    token.sep[3]     = '$';
    token.len_min[3] = SALT_MIN;
    token.len_max[3] = SALT_MAX;
    token.attr[3]    = TOKEN_ATTR_VERIFY_LENGTH
                     | TOKEN_ATTR_VERIFY_BASE64B;
  
    // payload in alternate base64 representanion
    token.sep[4]     = '$';
    token.len_min[4] = HASH_LEN_B64;
    token.len_max[4] = HASH_LEN_B64;
    token.attr[4]    = TOKEN_ATTR_VERIFY_LENGTH
                     | TOKEN_ATTR_VERIFY_BASE64B;
  
    const int rc_tokenizer = input_tokenizer ((const u8 *) line_buf, line_len, &token);
  
    if (rc_tokenizer != PARSER_OK) return (rc_tokenizer);
  
    // iter
    const u8 *iter_pos = token.buf[2];
    salt->salt_iter = hc_strtoul ((const char *) iter_pos, NULL, 10) - 1;
  
  
    // base64 decode salt
    const u8 *salt_pos = token.buf[3];
    const int salt_len = token.len[3];
  
    u8 tmp_buf[256] = { 0 };
  
    const size_t salt_len_decoded = base64_decode (ab64_to_int, (const u8 *) salt_pos, salt_len, tmp_buf);
  
    u8 *salt_buf_ptr = (u8 *) pbkdf2_sha256->salt_buf;
    memcpy (salt_buf_ptr, tmp_buf, salt_len_decoded);
    memcpy (salt->salt_buf, salt_buf_ptr, salt_len_decoded);
  
    salt->salt_len = salt_len_decoded;
  
  
    // base64 decode hash
    const u8 *hash_pos = token.buf[4];
    const int hash_len = token.len[4];
  
    base64_decode (ab64_to_int, (const u8 *) hash_pos, hash_len, tmp_buf);
    memcpy (digest, tmp_buf, HASH_LEN_RAW);
  
    digest[0] = byte_swap_32 (digest[0]);
    digest[1] = byte_swap_32 (digest[1]);
    digest[2] = byte_swap_32 (digest[2]);
    digest[3] = byte_swap_32 (digest[3]);
    digest[4] = byte_swap_32 (digest[4]);
    digest[5] = byte_swap_32 (digest[5]);
    digest[6] = byte_swap_32 (digest[6]);
    digest[7] = byte_swap_32 (digest[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 pbkdf2_sha256_t *pbkdf2_sha256 = (const pbkdf2_sha256_t *) esalt_buf;
  
    // hash
    u32 tmp[9];
  
    tmp[0] = byte_swap_32 (digest[0]);
    tmp[1] = byte_swap_32 (digest[1]);
    tmp[2] = byte_swap_32 (digest[2]);
    tmp[3] = byte_swap_32 (digest[3]);
    tmp[4] = byte_swap_32 (digest[4]);
    tmp[5] = byte_swap_32 (digest[5]);
    tmp[6] = byte_swap_32 (digest[6]);
    tmp[7] = byte_swap_32 (digest[7]);
    tmp[8] = 0;
  
    char salt_enc[257] = { 0 };
    char hash_enc[128] = { 0 };
  
    const size_t salt_len_enc = base64_encode (int_to_ab64, (const u8 *) pbkdf2_sha256->salt_buf, salt->salt_len, (u8 *) salt_enc);
    const size_t hash_len_enc = base64_encode (int_to_ab64, (const u8 *) tmp, HASH_LEN_RAW, (u8 *) hash_enc);
  
    // remove padding =
    for (size_t i = 0; i < salt_len_enc; i++)
    {
      if (salt_enc[i] == '=')
      {
        salt_enc[i] = '\0';
      }
    }
  
    for (size_t i = 0; i < hash_len_enc; i++)
    {
      if (hash_enc[i] == '=')
      {
        hash_enc[i] = '\0';
      }
    }
  
    // output
    const int line_len = snprintf (line_buf, line_size, "$%s$%u$%s$%s", SIGNATURE_PASSLIB_PBKDF2_SHA256, salt->salt_iter + 1, salt_enc, hash_enc);
    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_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_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;
  }
  