/**
 * 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_hash_sha1.h"

static const u32   ATTACK_EXEC    = ATTACK_EXEC_INSIDE_KERNEL;
static const u32   DGST_POS0      = 3;
static const u32   DGST_POS1      = 4;
static const u32   DGST_POS2      = 2;
static const u32   DGST_POS3      = 1;
static const u32   DGST_SIZE      = DGST_SIZE_4_5;
static const u32   HASH_CATEGORY  = HASH_CATEGORY_EAS;
static const char *HASH_NAME      = "PeopleSoft PS_TOKEN";
static const u64   KERN_TYPE      = 13500;
static const u32   OPTI_TYPE      = OPTI_TYPE_ZERO_BYTE
                                  | OPTI_TYPE_PRECOMPUTE_INIT
                                  | OPTI_TYPE_NOT_ITERATED
                                  | OPTI_TYPE_PREPENDED_SALT
                                  | OPTI_TYPE_RAW_HASH;
static const u64   OPTS_TYPE      = OPTS_TYPE_PT_GENERATE_BE
                                  | OPTS_TYPE_PT_UTF16LE
                                  | OPTS_TYPE_PT_ADD80;
static const u32   SALT_TYPE      = SALT_TYPE_EMBEDDED;
static const char *ST_PASS        = "hashcat";
static const char *ST_HASH        = "24eea51b53d02b4c5ff99bcb05a6847fdb2d9308:4f10a0de76e242040c28e9d3dd15c903343489c79765f9118c098c266b9ff505c95bd75bbe406ff3404849eea73930ad17937c0ba6fc3e7bb6d37362941318938b8af96d1292a310b3fd29a67e411ecb10d30247c99183a16951b3859054d4eba9dcd50709c7b21dee836d7ed195cc6b33317aeb557cc56392dc551faa8d5a0fb42212";

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 pstoken
{
  u32 salt_buf[128];
  u32 salt_len;

  u32 pc_digest[5];
  u32 pc_offset;

} pstoken_t;

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 (pstoken_t);

  return esalt_size;
}

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;

  pstoken_t *pstoken = (pstoken_t *) esalt_buf;

  token_t token;

  token.token_cnt  = 2;

  token.sep[0]     = hashconfig->separator;
  token.len_min[0] = 40;
  token.len_max[0] = 40;
  token.attr[0]    = TOKEN_ATTR_VERIFY_LENGTH
                   | TOKEN_ATTR_VERIFY_HEX;

  token.len_min[1] = 32;
  token.len_max[1] = 1024;
  token.attr[1]    = 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 *hash_pos = token.buf[0];

  digest[0] = hex_to_u32 (hash_pos +  0);
  digest[1] = hex_to_u32 (hash_pos +  8);
  digest[2] = hex_to_u32 (hash_pos + 16);
  digest[3] = hex_to_u32 (hash_pos + 24);
  digest[4] = hex_to_u32 (hash_pos + 32);

  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]);

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

  u8 *pstoken_ptr = (u8 *) pstoken->salt_buf;

  for (int i = 0, j = 0; i < salt_len; i += 2, j += 1)
  {
    pstoken_ptr[j] = hex_to_u8 (salt_pos + i);
  }

  pstoken->salt_len = salt_len / 2;

  /* some fake salt for the sorting mechanisms */

  salt->salt_buf[0] = pstoken->salt_buf[0];
  salt->salt_buf[1] = pstoken->salt_buf[1];
  salt->salt_buf[2] = pstoken->salt_buf[2];
  salt->salt_buf[3] = pstoken->salt_buf[3];
  salt->salt_buf[4] = pstoken->salt_buf[4];
  salt->salt_buf[5] = pstoken->salt_buf[5];
  salt->salt_buf[6] = pstoken->salt_buf[6];
  salt->salt_buf[7] = pstoken->salt_buf[7];

  salt->salt_len = 32;

  /* we need to check if we can precompute some of the data --
     this is possible since the scheme is badly designed */

  pstoken->pc_digest[0] = SHA1M_A;
  pstoken->pc_digest[1] = SHA1M_B;
  pstoken->pc_digest[2] = SHA1M_C;
  pstoken->pc_digest[3] = SHA1M_D;
  pstoken->pc_digest[4] = SHA1M_E;

  pstoken->pc_offset = 0;

  for (int i = 0; i < (int) pstoken->salt_len - 63; i += 64)
  {
    u32 w[16];

    w[ 0] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset +  0]);
    w[ 1] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset +  1]);
    w[ 2] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset +  2]);
    w[ 3] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset +  3]);
    w[ 4] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset +  4]);
    w[ 5] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset +  5]);
    w[ 6] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset +  6]);
    w[ 7] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset +  7]);
    w[ 8] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset +  8]);
    w[ 9] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset +  9]);
    w[10] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset + 10]);
    w[11] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset + 11]);
    w[12] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset + 12]);
    w[13] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset + 13]);
    w[14] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset + 14]);
    w[15] = byte_swap_32 (pstoken->salt_buf[pstoken->pc_offset + 15]);

    sha1_transform (w + 0, w + 4, w + 8, w + 12, pstoken->pc_digest);

    pstoken->pc_offset += 16;
  }

  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 pstoken_t *pstoken = (const pstoken_t *) esalt_buf;

  const u32 salt_len = (pstoken->salt_len > 512) ? 512 : pstoken->salt_len;

  char pstoken_tmp[1024 + 1] = { 0 };

  for (u32 i = 0, j = 0; i < salt_len; i += 1, j += 2)
  {
    const u8 *ptr = (const u8 *) pstoken->salt_buf;

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

  const int line_len = snprintf (line_buf, line_size, "%08x%08x%08x%08x%08x:%s",
    digest[0],
    digest[1],
    digest[2],
    digest[3],
    digest[4],
    pstoken_tmp);

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