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(), _secret_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(), _secret_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), _secret_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());
int security_ecc::generate_and_derive_ephemeral_key(const encryption_algotithm p_enc_algorithm, const std::vector<unsigned char>& p_recipients_public_key_x, const std::vector<unsigned char>& p_recipients_public_key_y) {
loggers::get_instance().log(">>> security_ecc::generate_and_derive_ephemeral_key");
loggers::get_instance().warning("security_ecc::generate_and_derive_ephemeral_key: Key shall be generated");
if ((_pub_key_x.size() == 0) || (_pub_key_y.size() == 0)) {
loggers::get_instance().warning("security_ecc::generate_and_derive_ephemeral_key format: Keys shall be generated");
return -1;
}
_encryption_algotithm = p_enc_algorithm;
// Set buffers size
int len = (EC_GROUP_get_degree(_ec_group) + 7) / 8;
// Convert the peer public encryption key to an EC point
EC_POINT *ec_point = nullptr;
bin_to_ec_point(p_recipients_public_key_x, p_recipients_public_key_y, &ec_point);
int result = ::ECDH_compute_key(_secret_key.data(), _secret_key.size(), ec_point, _ec_key, NULL);
loggers::get_instance().warning("security_ecc::generate_and_derive_ephemeral_key format: Failed to generate shared secret key");
::EC_POINT_free(ec_point);
return -1;
}
::EC_POINT_free(ec_point);
loggers::get_instance().log_to_hexa("security_ecc::generate_and_derive_ephemeral_key: _secret_key: ", _secret_key.data(), _secret_key.size());
// Derive the shared secret key
std::vector<unsigned char> k_enc(12 + 16 + 16, 0x00); // Nonce + AES 128 CCM key + Tag
// TODO Use ec_encryption_algorithm
std::vector<unsigned char> k_mac(32 + 32, 0x00);
std::vector<unsigned char> digest(k_enc.size() + k_mac.size(), 0x00);
loggers::get_instance().log("security_ecc::generate_and_derive_ephemeral_key: k_enc size:%d - k_mac size: %d - digest size:%d: ", k_enc.size(), k_mac.size(), digest.size());
if (PKCS5_PBKDF2_HMAC((const char*)_secret_key.data(), _secret_key.size(), NULL, 0, 2000, EVP_sha256(), digest.size(), digest.data()) != 1) {
loggers::get_instance().warning("security_ecc::generate_and_derive_ephemeral_key format: Failed to derive shared secret key");
return -1;
}
loggers::get_instance().log_to_hexa("security_ecc::generate_and_derive_ephemeral_key: digest: ", digest.data(), digest.size());
// Extract AES 128 parameters
_nonce.resize(12); // TODO Use ec_encryption_algorithm
std::copy(digest.begin(), digest.begin() + _nonce.size(), _nonce.begin());
loggers::get_instance().log_to_hexa("security_ecc::generate_and_derive_ephemeral_key: _nonce: ", _nonce.data(), _nonce.size());
_sym_key.resize(16);
std::copy(digest.begin() + _nonce.size(), digest.begin() + _nonce.size() + _sym_key.size(), _sym_key.begin());
loggers::get_instance().log_to_hexa("security_ecc::generate_and_derive_ephemeral_key: _sym_key: ", _sym_key.data(), _sym_key.size());
_tag.resize(16);
std::copy(digest.begin() + _nonce.size() + _sym_key.size(), digest.begin() + _nonce.size() + _sym_key.size() + _tag.size(), _tag.begin()); // TODO Useless???
loggers::get_instance().log_to_hexa("security_ecc::generate_and_derive_ephemeral_key: _tag: ", _tag.data(), _tag.size());
// Extract the HMAC key
std::vector<unsigned char> hmac_secret(32 + 32, 0x00);
std::copy(digest.data() + 44, digest.data() + 44 + 32 + 32, hmac_secret.begin());
loggers::get_instance().log_to_hexa("security_ecc::generate_and_derive_ephemeral_key: hmac_secret: ", hmac_secret.data(), hmac_secret.size());
// Encrypt the _sym_key
if (encrypt(encryption_algotithm::aes_128_ccm, _sym_key, _nonce, _sym_key, _enc_sym_key) == -1) {
loggers::get_instance().warning("security_ecc::generate_and_derive_ephemeral_key format: Failed to encrypt key");
return -1;
}
loggers::get_instance().log_to_hexa("security_ecc::generate_and_derive_ephemeral_key: Encrypted symmetric key: ", encrypted_symmetric_key().data(), encrypted_symmetric_key().size());
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
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
335
336
337
::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);
_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");
_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::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) || (_secret_key.size() == 0)) {
loggers::get_instance().warning("security_ecc::decrypt: Constrictor format #2 shall be used");
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
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, _secret_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
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
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;
}
/*int security_ecc::multiply_point_with_bn(const EC_POINT& a, const BIGNUM& b, EC_POINT** P) {
loggers::get_instance().log(">>> security_ecc::multiply_point_with_bn");
EC_POINT *O = EC_POINT_new(_ec_group);
if (*P == NULL) *P = EC_POINT_new(_ec_group);
for(int i = BN_num_bits(&b); i >= 0; i--) {
EC_POINT_dbl(_ec_group, *P, *P, _bn_ctx);
if (BN_is_bit_set(&b, i))
EC_POINT_add(_ec_group, *P, *P, &a, _bn_ctx);
else
EC_POINT_add(_ec_group, *P, *P, O, _bn_ctx);
}
EC_POINT_free(O);
return 0;
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
int security_ecc::derive_s_from_private_key(BIGNUM* S, BIGNUM* R) {
loggers::get_instance().log(">>> security_ecc::derive_s_from_private_key");
const EC_POINT *Kb = EC_KEY_get0_public_key(_ec_key);
BIGNUM *n = BN_new();
BIGNUM *r = BN_new();
EC_POINT *P = NULL;
EC_POINT *Rp = EC_POINT_new(_ec_group);
BIGNUM *Py = BN_new();
const EC_POINT *G = EC_GROUP_get0_generator(_ec_group);
int bits,ret=-1;
EC_GROUP_get_order(_ec_group, n, _bn_ctx);
bits = BN_num_bits(n);
BN_rand(r, bits, -1, 0);
// calculate R = rG
Rp = multiply_point_with_bn(Rp, G, r);
// calculate S = Px, P = (Px,Py) = Kb R
P = multiply_point_with_bn(P, Kb, r);
if (!EC_POINT_is_at_infinity(_ec_group, P)) {
EC_POINT_get_affine_coordinates_GFp(_ec_group, P, S, Py, _bn_ctx); // TODO Add 'switch'
EC_POINT_point2bn(_ec_group, Rp, POINT_CONVERSION_COMPRESSED, R, _bn_ctx);
ret = 0;
}
BN_free(r);
BN_free(n);
BN_free(Py);
EC_POINT_free(P);
EC_POINT_free(Rp);
return ret;
}
int security_ecc::derive_s_from_public_key(BIGNUM* S, BIGNUM* R) {
loggers::get_instance().log(">>> security_ecc::derive_s_from_public_key");
return 0;
}*/