Newer
Older
security_ecc::security_ecc(const ec_elliptic_curves p_elliptic_curve): _elliptic_curve(p_elliptic_curve), _encryption_algotithm(encryption_algotithm::aes_128_ccm), _ec_key(nullptr), _ec_group(nullptr), _bn_ctx(nullptr), _pri_key(), _pub_key_x(), _pub_key_y(), _eph_key(), _enc_key_x(), _enc_key_y(), _sym_key(), _nonce(), _tag() {
loggers::get_instance().log(">>> security_ecc::security_ecc: %d", static_cast<int>(p_elliptic_curve));
const int result = init();
if (result == -1) {
loggers::get_instance().error("security_ecc::security_ecc: Unsupported elliptic_curve %d", _elliptic_curve);
security_ecc::security_ecc(const ec_elliptic_curves p_elliptic_curve, const std::vector<unsigned char>& p_private_key): _elliptic_curve(p_elliptic_curve), _encryption_algotithm(encryption_algotithm::aes_128_ccm), _ec_key(nullptr), _ec_group(nullptr), _bn_ctx(nullptr), _pri_key(p_private_key), _pub_key_x(), _pub_key_y(), _eph_key(), _enc_key_x(), _enc_key_y(), _sym_key(), _nonce(), _tag() {
loggers::get_instance().log(">>> security_ecc::security_ecc (1): %d", static_cast<int>(p_elliptic_curve));
// Sanity checks
if ((_elliptic_curve == ec_elliptic_curves::nist_p_256) || (_elliptic_curve == ec_elliptic_curves::brainpool_p_256_r1)) {
if (p_private_key.size() != 32) {
loggers::get_instance().error("security_ecc::security_ecc: Invalid public keys size");
}
} else if (_elliptic_curve == ec_elliptic_curves::brainpool_p_384_r1) {
if ((p_private_key.size() != 48)) {
loggers::get_instance().error("security_ecc::security_ecc: Invalid public keys size");
loggers::get_instance().error("security_ecc::security_ecc: Unsupported elliptic_curve %d", _elliptic_curve);
::EC_KEY_set_conv_form(_ec_key, POINT_CONVERSION_COMPRESSED);
// Build private key
BIGNUM p;
::BN_init(&p);
::BN_bin2bn(_pri_key.data(), _pri_key.size(), &p);
// Build public keys
EC_POINT* ec_point = ::EC_POINT_new(_ec_group);
::EC_POINT_mul(_ec_group, ec_point, &p, NULL, NULL, _bn_ctx);
// Set private key
::EC_KEY_set_private_key(_ec_key, &p);
if (::EC_KEY_check_key(_ec_key) != 0) {
loggers::get_instance().error("security_ecc::security_ecc (1): Invalid private key");
}
// Private key is correct, set public keys
::EC_KEY_set_public_key(_ec_key, ec_point);
BIGNUM xy;
::BN_init(&xy);
::EC_POINT_point2bn(_ec_group, ec_point, POINT_CONVERSION_COMPRESSED, &xy, _bn_ctx);
std::vector<unsigned char> v(BN_num_bytes(&xy));
_pub_key_x.resize(l);
std::copy(v.cbegin(), v.cbegin() + l - 1, _pub_key_x.begin());
_pub_key_y.resize(l);
std::copy(v.cbegin() + l, v.cend(), _pub_key_y.begin());
::EC_POINT_free(ec_point);
} // End of constructor
security_ecc::security_ecc(const ec_elliptic_curves p_elliptic_curve, const std::vector<unsigned char>& p_public_key_x, const std::vector<unsigned char>& p_public_key_y): _elliptic_curve(p_elliptic_curve), _encryption_algotithm(encryption_algotithm::aes_128_ccm), _ec_key(nullptr), _ec_group(nullptr), _bn_ctx(nullptr), _pri_key(), _pub_key_x(p_public_key_x), _pub_key_y(p_public_key_y), _eph_key(), _enc_key_x(), _enc_key_y(), _sym_key(), _nonce(), _tag() {
loggers::get_instance().log(">>> security_ecc::security_ecc (2): %d", static_cast<int>(p_elliptic_curve));
// Sanity checks
if ((_elliptic_curve == ec_elliptic_curves::nist_p_256) || (_elliptic_curve == ec_elliptic_curves::brainpool_p_256_r1)) {
if ((p_public_key_x.size() != 32) || (p_public_key_y.size() != 32)) {
loggers::get_instance().error("security_ecc::security_ecc: Invalid public keys size");
}
} else if (_elliptic_curve == ec_elliptic_curves::brainpool_p_384_r1) {
if ((p_public_key_x.size() != 48) || (p_public_key_y.size() != 48)) {
loggers::get_instance().error("security_ecc::security_ecc: Invalid public keys size");
loggers::get_instance().error("security_ecc::security_ecc: Unsupported elliptic_curve %d", _elliptic_curve);
::EC_KEY_set_conv_form(_ec_key, POINT_CONVERSION_COMPRESSED);
// Set public key
BIGNUM x;
::BN_init(&x);
::BN_bin2bn(_pub_key_x.data(), _pub_key_x.size(), &x);
::BN_bin2bn(_pub_key_y.data(), _pub_key_y.size(), &y);
EC_POINT* ec_point = ::EC_POINT_new(_ec_group);
result = 0;
switch (_elliptic_curve) {
case ec_elliptic_curves::nist_p_256: // Use primary
// No break;
case ec_elliptic_curves::brainpool_p_256_r1:
// No break;
case ec_elliptic_curves::brainpool_p_384_r1:
result = ::EC_POINT_set_affine_coordinates_GFp(_ec_group, ec_point, &x, &y, _bn_ctx); // Use primary elliptic curve
break;
result = ::EC_POINT_set_affine_coordinates_GF2m(_ec_group, ec_point, &x, &y, _bn_ctx);
} // End of 'switch' statement
if (result == 0) {
loggers::get_instance().error("security_ecc::security_ecc (1): Failed to get coordinates");
}
::EC_KEY_set_public_key(_ec_key, ec_point);
::EC_POINT_free(ec_point);
} // End of constructor
security_ecc::~security_ecc() {
loggers::get_instance().log(">>> security_ecc::~security_ecc");
if(_ec_key != nullptr) {
::EC_KEY_free(_ec_key);
}
loggers::get_instance().log("<<< security_ecc::~security_ecc");
int security_ecc::generate() {
loggers::get_instance().log(">>> security_ecc::generate");
if (!::EC_KEY_generate_key(_ec_key)) { // Generate the private and public keys
loggers::get_instance().error("security_ecc::generate: Failed to generate private/public keys");
const EC_POINT* ec_point = EC_KEY_get0_public_key(_ec_key);
int result = 0;
switch (_elliptic_curve) {
case ec_elliptic_curves::nist_p_256: // Use primary
// No break;
case ec_elliptic_curves::brainpool_p_256_r1:
// No break;
case ec_elliptic_curves::brainpool_p_384_r1:
result = ::EC_POINT_get_affine_coordinates_GFp(_ec_group, ec_point, &x, &y, _bn_ctx); // Use primer on elliptic curve
break;
result = ::EC_POINT_get_affine_coordinates_GF2m(_ec_group, ec_point, &x, &y, _bn_ctx);
} // End of 'switch' statement
if (result == 0) {
loggers::get_instance().error("security_ecc::generate: Failed to get coordinates");
}
const BIGNUM* p = ::EC_KEY_get0_private_key(_ec_key);
_pri_key.resize(BN_num_bytes(p));
::BN_bn2bin(p, _pri_key.data());
_pub_key_x.resize(BN_num_bytes(&x));
::BN_bn2bin(&x, _pub_key_x.data());
_pub_key_y.resize(BN_num_bytes(&y));
::BN_bn2bin(&y, _pub_key_y.data());
// Compressed
int len = ::EC_POINT_point2oct(_ec_group, ec_point, POINT_CONVERSION_COMPRESSED, NULL, 0, _bn_ctx);
std::vector<unsigned char> cy;
cy.resize(len);
::EC_POINT_point2oct(_ec_group, ec_point, POINT_CONVERSION_COMPRESSED, (unsigned char *)cy.data(), len, _bn_ctx);
// TODO Create a compressed _pub_key_compressed_y
//_pub_key_compressed_y.resize(BN_num_bytes(&compressed_y));
//::BN_bn2bin(&compressed_y, _pub_key_compressed_y.data());
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
//int security_ecc::generate_and_derive_ephemeral_key(const std::vector<unsigned char>& p_public_key_x, const std::vector<unsigned char>& p_public_key_y) {
// loggers::get_instance().log(">>> security_ecc::generate_and_derive_ephemeral_key (1)");
//
// // Sanity checks
// if ((_pub_key_x.size() != 0) || (_pub_key_y.size() != 0)) {
// loggers::get_instance().warning("security_ecc::generate_and_derive_ephemeral_key: Constrictor format #1 shall be used");
// return -1;
// }
// ::EC_KEY_generate_key(_ec_key);
//
// // Set buffers size
// int len = (EC_GROUP_get_degree(_ec_group) + 7) / 8;
// _eph_key.resize(len);
//
// // Convert the public keys (X,Y) into EC_POINT data structure
// EC_POINT *ec_point = nullptr;
// bin_to_ec_point(p_public_key_x, p_public_key_y, &ec_point);
// // Generate the shared secret key
// int result = ::ECDH_compute_key(_eph_key.data(), _eph_key.size(), ec_point, _ec_key, NULL);
// if (result == -1) {
// ::EC_POINT_free(ec_point);
// return -1;
// }
// ::EC_POINT_free(ec_point);
// // Write the ephemeral key's public key to the output buffer
// std::vector<unsigned char> enc_key;
// public_key_to_bin(enc_key);
// // Extract X-coordinate and Y-coordinate
// _enc_key_x.assign(1 + enc_key.cbegin(), 1 + len + enc_key.cbegin());
// _enc_key_y.assign(1 + len + enc_key.cbegin(), enc_key.cend());
//
// return 0;
//}
//
int security_ecc::generate_and_derive_ephemeral_key(const std::vector<unsigned char>& p_peer_public_enc_key_x, const std::vector<unsigned char>& p_peer_public_enc_key_y) {
loggers::get_instance().log(">>> security_ecc::generate_and_derive_ephemeral_key (2)");
loggers::get_instance().warning("security_ecc::generate_and_derive_ephemeral_key: Constructor format #2 shall be used");
return -1;
}
// Set buffers size
int len = (EC_GROUP_get_degree(_ec_group) + 7) / 8;
_eph_key.resize(len);
// Convert the peer public encryption key to an EC point
EC_POINT *ec_point = nullptr;
bin_to_ec_point(p_peer_public_enc_key_x, p_peer_public_enc_key_y, &ec_point);
// Generate the shared secret key
int result = ::ECDH_compute_key(_eph_key.data(), _eph_key.size(), ec_point, _ec_key, NULL);
if (result == -1) {
::EC_POINT_free(ec_point);
return -1;
}
::EC_POINT_free(ec_point);
return 0;
int security_ecc::encrypt(const encryption_algotithm p_enc_algorithm, const std::vector<unsigned char>& p_message, std::vector<unsigned char>& p_enc_message) {
loggers::get_instance().log(">>> security_ecc::encrypt: %d", p_enc_algorithm);
// Sanity checks
if ((_pub_key_x.size() != 0) || (_pub_key_y.size() != 0)) {
loggers::get_instance().warning("security_ecc::encrypt: Constructor format #1 shall be used");
return -1;
}
_encryption_algotithm = p_enc_algorithm;
// Initialize the context and encryption operation
EVP_CIPHER_CTX *ctx = ::EVP_CIPHER_CTX_new();
switch (_encryption_algotithm) {
case encryption_algotithm::aes_128_ccm:
::EVP_EncryptInit_ex(ctx, EVP_aes_128_ccm(), NULL, NULL, NULL);
// Allocate buffers size
_nonce.resize(12);
_tag.resize(16);
p_enc_message.resize(p_message.size());
break;
case encryption_algotithm::aes_256_ccm:
::EVP_EncryptInit_ex(ctx, EVP_aes_256_ccm(), NULL, NULL, NULL);
break;
case encryption_algotithm::aes_128_gcm:
::EVP_EncryptInit_ex(ctx, EVP_aes_128_gcm(), NULL, NULL, NULL);
break;
case encryption_algotithm::aes_256_gcm:
::EVP_EncryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, NULL, NULL);
break;
} // End of 'switch' statement
// Generate _sym_key
::RAND_pseudo_bytes(_sym_key.data(), _sym_key.size());
loggers::get_instance().log_to_hexa("security_ecc::encrypt: _sym_key: ", _sym_key.data(), _sym_key.size());
// Generate _nonce
::RAND_pseudo_bytes(_nonce.data(), _nonce.size());
loggers::get_instance().log_to_hexa("security_ecc::encrypt: nonce: ", _nonce.data(), _nonce.size());
// Set nonce length
::EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_IVLEN, _nonce.size(), NULL);
// Set tag length
::EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_TAG, _tag.size(), NULL);
// Prime the key and nonce
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
::EVP_EncryptInit_ex(ctx, NULL, NULL, _sym_key.data(), _nonce.data());
// No authentication data
// Encrypt the data
int len = 0;
::EVP_EncryptUpdate(ctx, p_enc_message.data(), &len, p_message.data(), p_message.size());
// Finalize the encryption session
::EVP_EncryptFinal_ex(ctx, p_enc_message.data() + len, &len);
// Get the authentication tag
::EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_GET_TAG, _tag.size(), _tag.data());
loggers::get_instance().log_to_hexa("security_ecc::encrypt: tag: ", _tag.data(), _tag.size());
::EVP_CIPHER_CTX_free(ctx);
return 0;
}
int security_ecc::encrypt(const encryption_algotithm p_enc_algorithm, const std::vector<unsigned char>& p_symmetric_key, const std::vector<unsigned char>& p_nonce, const std::vector<unsigned char>& p_message, std::vector<unsigned char>& p_enc_message) {
loggers::get_instance().log(">>> security_ecc::encrypt (2): %d", p_enc_algorithm);
// Sanity checks
if ((_pub_key_x.size() != 0) || (_pub_key_y.size() != 0)) {
loggers::get_instance().warning("security_ecc::encrypt: Constructor format #1 shall be used");
return -1;
}
_encryption_algotithm = p_enc_algorithm;
_sym_key = p_symmetric_key;
_nonce = p_nonce;
// Initialize the context and encryption operation
EVP_CIPHER_CTX *ctx = ::EVP_CIPHER_CTX_new();
switch (_encryption_algotithm) {
case encryption_algotithm::aes_128_ccm:
::EVP_EncryptInit_ex(ctx, EVP_aes_128_ccm(), NULL, NULL, NULL);
// Allocate buffers size
_tag.resize(16);
p_enc_message.resize(p_message.size());
break;
case encryption_algotithm::aes_256_ccm:
::EVP_EncryptInit_ex(ctx, EVP_aes_256_ccm(), NULL, NULL, NULL);
break;
case encryption_algotithm::aes_128_gcm:
::EVP_EncryptInit_ex(ctx, EVP_aes_128_gcm(), NULL, NULL, NULL);
break;
case encryption_algotithm::aes_256_gcm:
::EVP_EncryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, NULL, NULL);
break;
} // End of 'switch' statement
loggers::get_instance().log_to_hexa("security_ecc::encrypt: _sym_key: ", _sym_key.data(), _sym_key.size());
loggers::get_instance().log_to_hexa("security_ecc::encrypt: nonce: ", _nonce.data(), _nonce.size());
// Set nonce length
::EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_IVLEN, _nonce.size(), NULL);
// Set tag length
::EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_TAG, _tag.size(), NULL);
// Prime the key and nonce
::EVP_EncryptInit_ex(ctx, NULL, NULL, _sym_key.data(), _nonce.data());
// No authentication data
// Encrypt the data
int len = 0;
::EVP_EncryptUpdate(ctx, p_enc_message.data(), &len, p_message.data(), p_message.size());
// Finalize the encryption session
::EVP_EncryptFinal_ex(ctx, p_enc_message.data() + len, &len);
// Get the authentication tag
::EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_GET_TAG, _tag.size(), _tag.data());
loggers::get_instance().log_to_hexa("security_ecc::encrypt: tag: ", _tag.data(), _tag.size());
::EVP_CIPHER_CTX_free(ctx);
return 0;
}
int security_ecc::decrypt(const encryption_algotithm p_enc_algorithm, const std::vector<unsigned char>& p_key, const std::vector<unsigned char>& p_nonce, const std::vector<unsigned char>& p_tag, const std::vector<unsigned char>& p_enc_message, std::vector<unsigned char>& p_message) {
loggers::get_instance().log(">>> security_ecc::decrypt");
loggers::get_instance().warning("security_ecc::decrypt: Constrictor format #2 shall be used");
return -1;
}
_encryption_algotithm = p_enc_algorithm;
_nonce = p_nonce;
_tag = p_tag;
// Initialize the context and decryption operation
EVP_CIPHER_CTX *ctx = ::EVP_CIPHER_CTX_new();
switch (_encryption_algotithm) {
case encryption_algotithm::aes_128_ccm:
::EVP_DecryptInit_ex(ctx, EVP_aes_128_ccm(), NULL, NULL, NULL);
break;
case encryption_algotithm::aes_256_ccm:
::EVP_DecryptInit_ex(ctx, EVP_aes_256_ccm(), NULL, NULL, NULL);
break;
case encryption_algotithm::aes_128_gcm:
::EVP_DecryptInit_ex(ctx, EVP_aes_128_gcm(), NULL, NULL, NULL);
break;
case encryption_algotithm::aes_256_gcm:
::EVP_DecryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, NULL, NULL);
break;
} // End of 'switch' statement
// Set nonce length
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_IVLEN, _nonce.size(), NULL);
// Set expected tag value
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_TAG, _tag.size(), _tag.data());
// Specify key and IV
EVP_DecryptInit_ex(ctx, NULL, NULL, _sym_key.data(), _nonce.data());
// Decrypt plaintext, verify tag: can only be called once
p_message.resize(p_enc_message.size());
int len = 0;
int result = EVP_DecryptUpdate(ctx, p_message.data(), &len, p_enc_message.data(), p_enc_message.size());
::EVP_CIPHER_CTX_free(ctx);
return (result > 0) ? 0 : -1;
}
/*int security_ecc::encrypt(const std::vector<unsigned char>& p_message, std::vector<unsigned char>& p_enc_message) {
loggers::get_instance().log(">>> security_ecc::encrypt");
// Sanity checks
if ((_pub_key_x.size() != 0) || (_pub_key_y.size() != 0)) {
loggers::get_instance().error("security_ecc::encrypt: Constructor format #1 shall be used");
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
return -1;
}
// Initialize the context and encryption operation
EVP_CIPHER_CTX *ctx = ::EVP_CIPHER_CTX_new();
switch (_encryption_algotithm) {
case encryption_algotithm::aes_128_ccm:
::EVP_EncryptInit_ex(ctx, EVP_aes_128_ccm(), NULL, NULL, NULL);
// Allocate buffers size
_nonce.resize(12);
_tag.resize(16);
p_enc_message.resize(p_message.size());
break;
case encryption_algotithm::aes_256_ccm:
::EVP_EncryptInit_ex(ctx, EVP_aes_256_ccm(), NULL, NULL, NULL);
break;
case encryption_algotithm::aes_128_gcm:
::EVP_EncryptInit_ex(ctx, EVP_aes_128_gcm(), NULL, NULL, NULL);
break;
case encryption_algotithm::aes_256_gcm:
::EVP_EncryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, NULL, NULL);
break;
} // End of 'switch' statement
// Generate _nonce
::RAND_pseudo_bytes(_nonce.data(), _nonce.size());
// Set nonce length
::EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_IVLEN, _nonce.size(), NULL);
// Set tag length
::EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_TAG, _tag.size(), NULL);
// Prime the key and nonce
::EVP_EncryptInit_ex(ctx, NULL, NULL, _eph_key.data(), _nonce.data());
// No authentication data
// Encrypt the data
::EVP_EncryptUpdate(ctx, p_enc_message.data(), &len, p_message.data(), p_message.size());
// Finalize the encryption session
::EVP_EncryptFinal_ex(ctx, p_enc_message.data() + len, &len);
// Get the authentication tag
::EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_GET_TAG, _tag.size(), _tag.data());
::EVP_CIPHER_CTX_free(ctx);
return 0;
int security_ecc::decrypt(const std::vector<unsigned char>& p_nonce, const std::vector<unsigned char>& p_tag, const std::vector<unsigned char>& p_enc_message, std::vector<unsigned char>& p_message) {
loggers::get_instance().log(">>> security_ecc::decrypt");
if ((_pri_key.size() == 0) || (_eph_key.size() == 0)) {
loggers::get_instance().warning("security_ecc::decrypt: Constrictor format #2 shall be used");
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
return -1;
}
_nonce = p_nonce;
_tag = p_tag;
// Initialize the context and decryption operation
EVP_CIPHER_CTX *ctx = ::EVP_CIPHER_CTX_new();
switch (_encryption_algotithm) {
case encryption_algotithm::aes_128_ccm:
::EVP_DecryptInit_ex(ctx, EVP_aes_128_ccm(), NULL, NULL, NULL);
break;
case encryption_algotithm::aes_256_ccm:
::EVP_DecryptInit_ex(ctx, EVP_aes_256_ccm(), NULL, NULL, NULL);
break;
case encryption_algotithm::aes_128_gcm:
::EVP_DecryptInit_ex(ctx, EVP_aes_128_gcm(), NULL, NULL, NULL);
break;
case encryption_algotithm::aes_256_gcm:
::EVP_DecryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, NULL, NULL);
break;
} // End of 'switch' statement
// Set nonce length
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_IVLEN, _nonce.size(), NULL);
// Set expected tag value
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_TAG, _tag.size(), _tag.data());
// Specify key and IV
EVP_DecryptInit_ex(ctx, NULL, NULL, _eph_key.data(), _nonce.data());
// Decrypt plaintext, verify tag: can only be called once
p_message.resize(p_enc_message.size());
int len = 0;
int result = EVP_DecryptUpdate(ctx, p_message.data(), &len, p_enc_message.data(), p_enc_message.size());
::EVP_CIPHER_CTX_free(ctx);
return (result > 0) ? 0 : -1;
}
int security_ecc::sign(const std::vector<unsigned char>& p_data, std::vector<unsigned char>& p_r_sig, std::vector<unsigned char>& p_s_sig) {
loggers::get_instance().log(">>> security_ecc::sign");
if(_pri_key.size() == 0) { // No private key
ECDSA_SIG *signature = ::ECDSA_do_sign(p_data.data(), p_data.size(), _ec_key);
if (signature == nullptr) {
loggers::get_instance().warning("security_ecc::sign: Signature failed");
loggers::get_instance().log("security_ecc::sign: succeed");
if (::ECDSA_do_verify(p_data.data(), p_data.size(), signature, _ec_key) != 1) {
loggers::get_instance().warning("security_ecc::sign: Signature not verified");
return -1;
}
p_r_sig.resize(BN_num_bytes(signature->r));
::BN_bn2bin(signature->r, p_r_sig.data());
//loggers::get_instance().log_to_hexa("security_ecc::sign: r=", p_r_sig.data(), p_r_sig.size());
p_s_sig.resize(BN_num_bytes(signature->r));
::BN_bn2bin(signature->s, p_s_sig.data());
//loggers::get_instance().log_to_hexa("security_ecc::sign: s=", p_s_sig.data(), p_s_sig.size());
::ECDSA_SIG_free(signature);
return 0;
}
int security_ecc::sign_verif(const std::vector<unsigned char>& p_data, const std::vector<unsigned char>& p_signature) {
loggers::get_instance().log(">>> security_ecc::sign_verif");
if (p_data.size() == 0) {
return false;
}
// Build the signature
BIGNUM r, s;
::BN_init(&r);
::BN_init(&s);
::BN_bin2bn(p_signature.data(), p_signature.size() / 2, &r);
::BN_bin2bn(p_signature.data() + p_signature.size() / 2, p_signature.size() / 2, &s);
ECDSA_SIG *signature = ECDSA_SIG_new();
signature->r = &r;
signature->s = &s;
int result = ::ECDSA_do_verify(p_data.data(), p_data.size(), signature, _ec_key);
::ECDSA_SIG_free(signature);
loggers::get_instance().log("security_ecc::sign_verif: %s", (result == 1) ? "succeed": "failed");
const int security_ecc::init() {
loggers::get_instance().log(">>> security_ecc::init: %d", static_cast<int>(_elliptic_curve));
::OpenSSL_add_all_algorithms();
switch (_elliptic_curve) { // TODO Group this cde into a private method
case ec_elliptic_curves::nist_p_256: // Use the ANSI X9.62 Prime 256v1 curve
result = ::OBJ_txt2nid("prime256v1");
break;
case ec_elliptic_curves::brainpool_p_256_r1:
result = ::OBJ_txt2nid("brainpoolP256r1");
break;
case ec_elliptic_curves::brainpool_p_384_r1:
result = ::OBJ_txt2nid("brainpoolP384r1");
break;
default:
loggers::get_instance().error("security_ecc::security_ecc: Unsupported EC elliptic_curve");
loggers::get_instance().warning("security_ecc::security_ecc: Unaible to set EC elliptic_curve");
return -1;
}
_ec_key = ::EC_KEY_new_by_curve_name(result); // Set the elliptic curve
::EC_KEY_set_asn1_flag(_ec_key, OPENSSL_EC_NAMED_CURVE); // Used to save and retrieve keys
_ec_group = ::EC_KEY_get0_group(_ec_key); // Get pointer to the EC_GROUP
_bn_ctx = ::BN_CTX_new();
return 0;
} // End of init
int security_ecc::bin_to_ec_point(const std::vector<unsigned char>& p_public_key_x, const std::vector<unsigned char>& p_public_key_y, EC_POINT** p_ec_point) { // ec_key_public_key_bin_to_point
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
BIGNUM* pubk_bn;
std::vector<unsigned char> v(1, 0x04);
v.insert(v.end(), std::make_move_iterator(p_public_key_x.begin()), std::make_move_iterator(p_public_key_x.end()));
v.insert(v.end(), std::make_move_iterator(p_public_key_y.begin()), std::make_move_iterator(p_public_key_y.end()));
pubk_bn = ::BN_bin2bn(v.data(), v.size(), NULL);
*p_ec_point = ::EC_POINT_new(_ec_group);
::EC_POINT_bn2point(_ec_group, pubk_bn, *p_ec_point, _bn_ctx);
// BIO *bio_out = NULL; /* stdout */
// bio_out = BIO_new_fp(stdout, BIO_NOCLOSE);
// BIGNUM *x = BN_new();
// BIGNUM *y = BN_new();
// if (EC_POINT_get_affine_coordinates_GFp(_ec_group, *p_ec_point, x, y, NULL)) {
// BN_print_fp(stdout, x);
// putc('\n', stdout);
// BN_print_fp(stdout, y);
// putc('\n', stdout);
// }
// BN_free(x); BN_free(y);
return 0;
}
int security_ecc::public_key_to_bin(std::vector<unsigned char>& p_bin_key) { // ec_key_public_key_to_bin
const EC_GROUP *ec_group = EC_KEY_get0_group(_ec_key);
const EC_POINT *pub = EC_KEY_get0_public_key(_ec_key);
BIGNUM *pub_bn = BN_new();
::EC_POINT_point2bn(ec_group, pub, POINT_CONVERSION_UNCOMPRESSED, pub_bn, _bn_ctx);
p_bin_key.resize(BN_num_bytes(pub_bn));
::BN_bn2bin(pub_bn, p_bin_key.data());
::BN_clear_free(pub_bn);
return 0;
}