81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
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#ifndef BACKEND_OPENSSL_HPP_CRRV8DCH
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#define BACKEND_OPENSSL_HPP_CRRV8DCH
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#include <vanetza/security/backend.hpp>
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#include <array>
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#include <cstdint>
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namespace vanetza
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{
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namespace security
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{
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// forward declaration
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namespace openssl
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{
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class Key;
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class Point;
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class Signature;
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} // namespace openssl
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/**
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* \brief Backend implementation based on OpenSSL
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*/
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class BackendOpenSsl : public Backend
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{
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public:
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static constexpr auto backend_name = "OpenSSL";
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BackendOpenSsl();
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/// \see Backend::sign_data
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EcdsaSignature sign_data(const ecdsa256::PrivateKey& private_key, const ByteBuffer& data_buffer) override;
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/// \see Backend::sign_digest
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Signature sign_digest(const PrivateKey&, const ByteBuffer& digest) override;
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/// \see Backend::verify_data
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bool verify_data(const ecdsa256::PublicKey& public_key, const ByteBuffer& data, const EcdsaSignature& sig) override;
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/// \see Backend::verify_digest
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bool verify_digest(const PublicKey&, const ByteBuffer& digest, const Signature&) override;
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ByteBuffer calculate_hash(HashAlgorithm, const ByteBuffer&) override;
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/// \see Backend::decompress_point
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boost::optional<Uncompressed> decompress_point(const EccPoint& ecc_point) override;
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/// \see Backend::generate_key_pair
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ecdsa256::KeyPair generate_key_pair() override;
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private:
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/// calculate SHA256 digest of data buffer
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std::array<uint8_t, 32> calculate_sha256_digest(const ByteBuffer& data) const;
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/// calculate SHA384 digest of data buffer
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std::array<uint8_t, 48> calculate_sha384_digest(const ByteBuffer& data) const;
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/// convert to internal format of private key
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openssl::Key internal_private_key(const ecdsa256::PrivateKey&) const;
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openssl::Key internal_private_key(const PrivateKey&) const;
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/// convert to internal format of public key
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openssl::Key internal_public_key(const ecdsa256::PublicKey&) const;
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openssl::Key internal_public_key(const PublicKey&) const;
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/// convert to internal format of an EC point
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openssl::Point internal_ec_point(const PublicKey&) const;
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};
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namespace openssl
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{
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/// Derive the public key from a private key (pub = priv * G), on the key's own curve.
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PublicKey derive_public_key(const PrivateKey& private_key);
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} // namespace openssl
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} // namespace security
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} // namespace vanetza
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#endif /* BACKEND_OPENSSL_HPP_CRRV8DCH */
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