/*************************************************************************
* Copyright (C) 2023 Intel Corporation
*
* Licensed under the Apache License,  Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* 	http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law  or agreed  to  in  writing,  software
* distributed under  the License  is  distributed  on  an  "AS IS"  BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the  specific  language  governing  permissions  and
* limitations under the License.
*************************************************************************/
#ifdef MBX_FIPS_MODE

#include <crypto_mb/ec_nistp256.h>
#include <crypto_mb/fips_cert.h>

#include <internal/fips_cert/common.h>

#ifndef BN_OPENSSL_DISABLE
  #include <openssl/ecdsa.h>
#endif

/* KAT TEST (taken from FIPS 186-4 examples) */
// msg ==
// "e1130af6a38ccb412a9c8d13e15dbfc9e69a16385af3c3f1e5da954fd5e7c45f"
// "d75e2b8c36699228e92840c0562fbf3772f07e17f1add56588dd45f7450e1217"
// "ad239922dd9c32695dc71ff2424ca0dec1321aa47064a044b7fe3c2b97d03ce4"
// "70a592304c5ef21eed9f93da56bb232d1eeb0035f9bf0dfafdcc4606272b20a3"

/* msgDigest == SHA-256(msg) */
static const int8u msg_digest[MBX_NISTP256_DATA_BYTE_LEN] = {0xd1,0xb8,0xef,0x21,0xeb,0x41,0x82,0xee,
                                                         0x27,0x06,0x38,0x06,0x10,0x63,0xa3,0xf3,
                                                         0xc1,0x6c,0x11,0x4e,0x33,0x93,0x7f,0x69,
                                                         0xfb,0x23,0x2c,0xc8,0x33,0x96,0x5a,0x94};
/* public key */
static const int8u Qx[MBX_NISTP256_DATA_BYTE_LEN]         = {0x3c,0xbf,0x9a,0xf4,0x12,0x6e,0x2e,0xf8,
                                                         0x74,0xc0,0x67,0x7a,0x6f,0xe1,0x34,0x51,
                                                         0x0c,0x7a,0x95,0xf8,0xa7,0x44,0x43,0xef,
                                                         0xb7,0x3c,0xbb,0xd4,0x61,0xdc,0x24,0xe4};

static const int8u Qy[MBX_NISTP256_DATA_BYTE_LEN]         = {0x27,0xe9,0xae,0xdf,0xe7,0x60,0x6f,0x3d,
                                                         0x24,0xd1,0x85,0xac,0x65,0x59,0x7e,0x12,
                                                         0xf0,0xda,0xdd,0xe1,0x9d,0x94,0x45,0x15,
                                                         0x65,0x48,0xbc,0xa2,0x7a,0xed,0x0e,0x97};
/* signature */
static const int8u r[MBX_NISTP256_DATA_BYTE_LEN]          = {0xbf,0x96,0xb9,0x9a,0xa4,0x9c,0x70,0x5c,
                                                         0x91,0x0b,0xe3,0x31,0x42,0x01,0x7c,0x64,
                                                         0x2f,0xf5,0x40,0xc7,0x63,0x49,0xb9,0xda,
                                                         0xb7,0x2f,0x98,0x1f,0xd9,0x34,0x7f,0x4f};

static const int8u s[MBX_NISTP256_DATA_BYTE_LEN]          = {0x17,0xc5,0x50,0x95,0x81,0x90,0x89,0xc2,
                                                         0xe0,0x3b,0x9c,0xd4,0x15,0xab,0xdf,0x12,
                                                         0x44,0x4e,0x32,0x30,0x75,0xd9,0x8f,0x31,
                                                         0x92,0x0b,0x9e,0x0f,0x57,0xec,0x87,0x1c};

DLL_PUBLIC
fips_test_status fips_selftest_mbx_nistp256_ecdsa_verify_mb8(void) {
  fips_test_status test_result = MBX_ALGO_SELFTEST_OK;

  /* function input parameters */
  // msg digest
  const int8u *const pa_pub_msg_digest[MBX_LANES] = {
      msg_digest, msg_digest, msg_digest, msg_digest,
      msg_digest, msg_digest, msg_digest, msg_digest};
  // public key
  const int64u *const pa_pub_Qx[MBX_LANES] = {
      (const int64u *const)Qx, (const int64u *const)Qx,
      (const int64u *const)Qx, (const int64u *const)Qx,
      (const int64u *const)Qx, (const int64u *const)Qx,
      (const int64u *const)Qx, (const int64u *const)Qx};
  const int64u *const pa_pub_Qy[MBX_LANES] = {
      (const int64u *const)Qy, (const int64u *const)Qy,
      (const int64u *const)Qy, (const int64u *const)Qy,
      (const int64u *const)Qy, (const int64u *const)Qy,
      (const int64u *const)Qy, (const int64u *const)Qy};
  // KAT signature
  const int8u *const pa_sign_r[MBX_LANES] = {r, r, r, r, r, r, r, r};
  const int8u *const pa_sign_s[MBX_LANES] = {s, s, s, s, s, s, s, s};

  /* test function */
  mbx_status expected_sts_mb8 = MBX_SET_STS_ALL(MBX_STATUS_OK);

  mbx_status sts;
  sts = mbx_nistp256_ecdsa_verify_mb8(pa_sign_r, pa_sign_s, pa_pub_msg_digest, pa_pub_Qx, pa_pub_Qy, NULL, NULL);
  if (expected_sts_mb8 != sts) {
    test_result = MBX_ALGO_SELFTEST_KAT_ERR;
  }

  return test_result;
}

#ifndef BN_OPENSSL_DISABLE

#define MEM_FREE(BN_PTR1, BN_PTR2, SIG_PTR1) { \
    BN_free(BN_PTR1);                          \
    BN_free(BN_PTR2);                          \
    ECDSA_SIG_free(SIG_PTR1); }

DLL_PUBLIC
fips_test_status fips_selftest_mbx_nistp256_ecdsa_verify_ssl_mb8(void) {
  fips_test_status test_result = MBX_ALGO_SELFTEST_OK;

  /* ssl public key */
  BIGNUM *BN_Qx = BN_new();
  BIGNUM *BN_Qy = BN_new();
  // ssl signature
  BIGNUM *BN_r = BN_new();
  BIGNUM *BN_s = BN_new();
  ECDSA_SIG *sig = ECDSA_SIG_new();
  /* check if allocated memory is valid */
  if(NULL == BN_Qx || NULL == BN_Qy || NULL == BN_r || NULL == BN_s || NULL == sig) {
    test_result = MBX_ALGO_SELFTEST_BAD_ARGS_ERR;
    MEM_FREE(BN_Qx, BN_Qy, sig)
    // Handled separately, since memory management of
    // these variables is transferred to sig below
    BN_free(BN_r);
    BN_free(BN_s);
    return test_result;
  }

  // set ssl public key and signature
  BN_lebin2bn(Qx, MBX_NISTP256_DATA_BYTE_LEN, BN_Qx);
  BN_lebin2bn(Qy, MBX_NISTP256_DATA_BYTE_LEN, BN_Qy);
  BN_bin2bn(r, MBX_NISTP256_DATA_BYTE_LEN, BN_r);
  BN_bin2bn(s, MBX_NISTP256_DATA_BYTE_LEN, BN_s);
  ECDSA_SIG_set0(sig, BN_r, BN_s);

  /* function input parameters */
  // msg digest
  const int8u *const pa_pub_msg_digest[MBX_LANES] = {
      msg_digest, msg_digest, msg_digest, msg_digest,
      msg_digest, msg_digest, msg_digest, msg_digest};
  // public key
  const BIGNUM *const pa_pub_Qx[MBX_LANES] = {BN_Qx, BN_Qx, BN_Qx, BN_Qx,
                                              BN_Qx, BN_Qx, BN_Qx, BN_Qx};
  const BIGNUM *const pa_pub_Qy[MBX_LANES] = {BN_Qy, BN_Qy, BN_Qy, BN_Qy,
                                              BN_Qy, BN_Qy, BN_Qy, BN_Qy};
  // signature
  const ECDSA_SIG *const pa_sig[MBX_LANES] = {sig, sig, sig, sig,
                                              sig, sig, sig, sig};

  /* test function */
  mbx_status expected_sts_mb8 = MBX_SET_STS_ALL(MBX_STATUS_OK);

  mbx_status sts;
  sts = mbx_nistp256_ecdsa_verify_ssl_mb8(pa_sig, pa_pub_msg_digest, pa_pub_Qx, pa_pub_Qy, NULL, NULL);
  if (expected_sts_mb8 != sts) {
    test_result = MBX_ALGO_SELFTEST_KAT_ERR;
  }

  // memory free
  MEM_FREE(BN_Qx, BN_Qy, sig)

  return test_result;
}

#endif // BN_OPENSSL_DISABLE
#endif // MBX_FIPS_MODE
