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Add ECDSA P-521 signature verification algorithm

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This commit is contained in:
Carles Fernandez 2024-07-17 19:53:21 +02:00
parent a06897590b
commit fcb20cb914
No known key found for this signature in database
GPG Key ID: 4C583C52B0C3877D
3 changed files with 166 additions and 0 deletions
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119
src/core/system_parameters/gnss_crypto.cc
View File

@ -866,6 +866,125 @@ bool Gnss_Crypto::verify_signature(const std::vector<uint8_t>& message, const st
}
bool Gnss_Crypto::verify_signature_p521(const std::vector<uint8_t>& message, const std::vector<uint8_t>& signature) const
{
if (!have_public_key())
{
std::cerr << "Galileo OSNMA KROOT verification error: Public key is not available" << std::endl;
return false;
}
bool success = false;
// Convert signature to DER format
std::vector<uint8_t> der_sig;
if (!convert_raw_to_der_ecdsa(signature, der_sig))
{
LOG(INFO) << "Failed to convert raw ECDSA signature to DER format";
return false;
}
#if USE_GNUTLS_FALLBACK
// Compute SHA-512 hash of the message
std::vector<uint8_t> digest(64);
gnutls_hash_hd_t hash;
if (gnutls_hash_init(&hash, GNUTLS_DIG_SHA512) != GNUTLS_E_SUCCESS)
{
LOG(INFO) << "OpenSSL: gnutls_hash_init failed";
return false;
}
gnutls_hash(hash, message.data(), message.size());
gnutls_hash_deinit(hash, digest.data());
gnutls_datum_t digest_data = {const_cast<unsigned char*>(digest.data()), static_cast<unsigned int>(digest.size())};
gnutls_datum_t signature_data = {const_cast<unsigned char*>(der_sig.data()), static_cast<unsigned int>(der_sig.size())};
// Verify the ECDSA signature
int ret = gnutls_pubkey_verify_data2(d_PublicKey, GNUTLS_SIGN_ECDSA_SHA512, 0, &digest_data, &signature_data);
success = (ret >= 0);
if (success)
{
LOG(INFO) << "GnuTLS: OSNMA signature authenticated successfully";
}
else
{
std::cerr << "GnuTLS: OSNMA message authentication failed: " << gnutls_strerror(ret) << std::endl;
LOG(WARNING) << "GnuTLS: OSNMA message authentication failed: " << gnutls_strerror(ret);
}
#else // OpenSSL
// Compute SHA-512 hash of the message
std::vector<uint8_t> digest(SHA512_DIGEST_LENGTH);
if (!EVP_Digest(message.data(), message.size(), digest.data(), nullptr, EVP_sha512(), nullptr))
{
LOG(INFO) << "OpenSSL: EVP_Digest failed";
return false;
}
#if USE_OPENSSL_3
// Verify the signature
EVP_PKEY_CTX* pctx = EVP_PKEY_CTX_new(d_PublicKey, nullptr);
if (pctx == nullptr)
{
LOG(INFO) << "OpenSSL: EVP_PKEY_CTX_new failed";
return false;
}
if (EVP_PKEY_verify_init(pctx) <= 0)
{
LOG(INFO) << "OpenSSL: EVP_PKEY_verify_init failed";
EVP_PKEY_CTX_free(pctx);
return false;
}
if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha512()) <= 0)
{
LOG(INFO) << "OpenSSL: EVP_PKEY_CTX_set_signature_md failed";
EVP_PKEY_CTX_free(pctx);
return false;
}
int verification = EVP_PKEY_verify(pctx, der_sig.data(), der_sig.size(), digest.data(), digest.size());
EVP_PKEY_CTX_free(pctx);
if (verification == 1)
{
LOG(INFO) << "OpenSSL: OSNMA signature authenticated successfully";
success = true;
}
else if (verification == 0)
{
LOG(INFO) << "OpenSSL: invalid signature found when verifying message";
}
else
{
LOG(INFO) << "OpenSSL: OSNMA message authentication failed";
}
#else // OpenSSL 1.x
const unsigned char* sig_ptr = der_sig.data();
ECDSA_SIG* ecdsa_sig = d2i_ECDSA_SIG(nullptr, &sig_ptr, der_sig.size());
if (ecdsa_sig == nullptr)
{
LOG(INFO) << "OpenSSL: d2i_ECDSA_SIG failed";
return false;
}
int verification = ECDSA_do_verify(digest.data(), digest.size(), ecdsa_sig, d_PublicKey);
ECDSA_SIG_free(ecdsa_sig);
if (verification == 1)
{
LOG(INFO) << "OpenSSL: OSNMA signature authenticated successfully";
success = true;
}
else if (verification == 0)
{
LOG(INFO) << "OpenSSL: invalid signature found when verifying message";
}
else
{
LOG(INFO) << "OpenSSL: OSNMA message authentication failed";
}
#endif
#endif
return success;
}
void Gnss_Crypto::set_public_key(const std::vector<uint8_t>& publicKey)
{
#if USE_GNUTLS_FALLBACK

2
src/core/system_parameters/gnss_crypto.h
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@ -44,7 +44,9 @@ public:
void set_public_key(const std::vector<uint8_t>& publickey);
bool have_public_key() const;
bool verify_signature(const std::vector<uint8_t>& message, const std::vector<uint8_t>& signature) const;
bool verify_signature_p521(const std::vector<uint8_t>& message, const std::vector<uint8_t>& signature) const;
bool store_public_key(const std::string& pubKeyFilePath) const;
std::vector<uint8_t> getPublicKey() const;
std::vector<uint8_t> computeSHA256(const std::vector<uint8_t>& input) const;
std::vector<uint8_t> computeSHA3_256(const std::vector<uint8_t>& input) const;

45
src/tests/unit-tests/signal-processing-blocks/osnma/gnss_crypto_test.cc
View File

@ -64,6 +64,51 @@ TEST(GnssCryptoTest, VerifySignature)
}
TEST(GnssCryptoTest, VerifySignatureP521)
{
std::unique_ptr<Gnss_Crypto> d_crypto = std::make_unique<Gnss_Crypto>();
// Message to be verified
std::vector<uint8_t> message = {
0x48, 0x65, 0x6C, 0x6C, 0x6F, 0x20, 0x57, 0x6F, 0x72, 0x6C, 0x64 // "Hello World"
};
// Public key in PEM format
std::vector<uint8_t> publicKey = {
0x2d, 0x2d, 0x2d, 0x2d, 0x2d, 0x42, 0x45, 0x47, 0x49, 0x4e, 0x20, 0x50, 0x55, 0x42, 0x4c, 0x49, 0x43, 0x20, 0x4b, 0x45, 0x59, 0x2d, 0x2d, 0x2d, 0x2d, 0x2d, 0x0a,
0x4d, 0x49, 0x47, 0x62, 0x4d, 0x42, 0x41, 0x47, 0x42, 0x79, 0x71, 0x47, 0x53, 0x4d, 0x34, 0x39, 0x41, 0x67, 0x45, 0x47, 0x42, 0x53, 0x75, 0x42, 0x42, 0x41, 0x41,
0x6a, 0x41, 0x34, 0x47, 0x47, 0x41, 0x41, 0x51, 0x41, 0x6f, 0x35, 0x76, 0x77, 0x66, 0x6e, 0x47, 0x57, 0x47, 0x33, 0x44, 0x63, 0x59, 0x75, 0x2b, 0x2f, 0x61, 0x58,
0x47, 0x32, 0x7a, 0x74, 0x65, 0x41, 0x46, 0x50, 0x54, 0x33, 0x0a, 0x48, 0x36, 0x4c, 0x76, 0x4f, 0x4c, 0x76, 0x49, 0x51, 0x6a, 0x61, 0x2b, 0x6a, 0x74, 0x57, 0x73,
0x70, 0x4f, 0x38, 0x37, 0x6f, 0x50, 0x32, 0x4e, 0x6d, 0x72, 0x34, 0x6e, 0x50, 0x68, 0x76, 0x62, 0x53, 0x58, 0x52, 0x4d, 0x37, 0x6a, 0x49, 0x69, 0x46, 0x38, 0x47,
0x70, 0x6b, 0x75, 0x58, 0x6a, 0x75, 0x4e, 0x7a, 0x34, 0x72, 0x61, 0x56, 0x4f, 0x65, 0x49, 0x4d, 0x42, 0x77, 0x45, 0x2b, 0x61, 0x0a, 0x30, 0x4c, 0x76, 0x7a, 0x37,
0x69, 0x54, 0x4d, 0x5a, 0x46, 0x41, 0x41, 0x51, 0x64, 0x2b, 0x70, 0x47, 0x72, 0x56, 0x54, 0x47, 0x77, 0x66, 0x53, 0x48, 0x49, 0x72, 0x49, 0x49, 0x45, 0x78, 0x74,
0x5a, 0x35, 0x77, 0x30, 0x38, 0x51, 0x4f, 0x43, 0x58, 0x2f, 0x75, 0x46, 0x65, 0x2b, 0x30, 0x78, 0x52, 0x78, 0x4c, 0x64, 0x2f, 0x33, 0x36, 0x42, 0x4e, 0x74, 0x63,
0x74, 0x69, 0x2f, 0x45, 0x4c, 0x0a, 0x4b, 0x31, 0x35, 0x67, 0x2b, 0x4b, 0x32, 0x71, 0x67, 0x2f, 0x6c, 0x39, 0x46, 0x42, 0x47, 0x67, 0x4d, 0x2b, 0x51, 0x3d, 0x0a,
0x2d, 0x2d, 0x2d, 0x2d, 0x2d, 0x45, 0x4e, 0x44, 0x20, 0x50, 0x55, 0x42, 0x4c, 0x49, 0x43, 0x20, 0x4b, 0x45, 0x59, 0x2d, 0x2d, 0x2d, 0x2d, 0x2d, 0x0a};
// ECDSA P-521 signature
std::vector<uint8_t> signature = {
0x01, 0x7b, 0x59, 0xac, 0x3a, 0x03, 0x5c, 0xb4, 0x07, 0xcd, 0xc1, 0xeb, 0xbe, 0xe5, 0xa6, 0xcb,
0xda, 0x0a, 0xff, 0x4d, 0x38, 0x61, 0x16, 0x0f, 0xb3, 0x77, 0xe5, 0x8a, 0xdc, 0xf3, 0xfd, 0x79,
0x38, 0x1e, 0xe8, 0x08, 0x3d, 0x5d, 0xbc, 0xc2, 0x80, 0x6e, 0xe9, 0x2b, 0xc3, 0xef, 0x07, 0x3d,
0x0c, 0x82, 0x4c, 0x9b, 0x7a, 0x5c, 0x2e, 0xd5, 0x46, 0xbd, 0x22, 0x21, 0x13, 0x8a, 0xb2, 0xca,
0x96, 0x3d, 0x01, 0xba, 0x2a, 0xc4, 0x3f, 0xdb, 0x66, 0x3c, 0x40, 0x26, 0xd9, 0xbc, 0x26, 0xd5, 0x57, 0xd4,
0xbd, 0x15, 0x16, 0x88, 0x21, 0x3b, 0xaa, 0x07, 0x89, 0xef, 0x29, 0x8f, 0x2f, 0x85, 0x76, 0x58,
0x9d, 0xca, 0x00, 0xcc, 0xc8, 0x30, 0x88, 0x31, 0x99, 0xc1, 0x94, 0xb9, 0xaf, 0x91, 0xdc, 0xc4,
0x6f, 0x19, 0x2b, 0x12, 0xa2, 0x82, 0xa5, 0x66, 0x5e, 0x4b, 0xbb, 0xdf, 0x65, 0x81, 0x52, 0x14,
0x01, 0xd7};
d_crypto->set_public_key(publicKey);
bool result = d_crypto->verify_signature_p521(message, signature);
ASSERT_TRUE(result);
std::vector<uint8_t> wrong_signature = signature;
wrong_signature[1] = 1;
bool result2 = d_crypto->verify_signature_p521(message, wrong_signature);
ASSERT_TRUE(!result2);
}
TEST(GnssCryptoTest, VerifyPubKeyImport)
{
auto d_crypto = std::make_unique<Gnss_Crypto>();