EllipticCurveDSA.h

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// (c) IMT - Information Management Technology AG, CH-9470 Buchs, www.imt.ch.
 
#ifndef IMT_BASE_LIB_CRYPTO_ELLIPTICCURVEDSA_H
#define IMT_BASE_LIB_CRYPTO_ELLIPTICCURVEDSA_H
 
#include <Imt.Base.Core.Platform/Platform.h>
#include <Imt.Base.Core.Platform/StaticClass.h>
#include <Imt.Base.Core.Util/Span.h>
 
// AXIVION FILE Style AutosarC++19_03-A18.1.1: use C-style array for compatibility
// AXIVION FILE Style AutosarC++19_03-A8.4.7: pointer parameters are to pass an array and can not be passed by value
 
namespace imt {
namespace base {
namespace lib {
namespace crypto {
 
// AXIVION Next Construct AutosarC++19_03-A0.1.6: Type may not be used in the projects
class EllipticCurveDSA final : private ::imt::base::core::platform::StaticClass {
 
public:
 
    static constexpr uint32_t PUBLIC_KEY_SIZE {179U};
 
    static constexpr uint32_t MAX_SIGNATURE_SIZE {73U};
 
    static constexpr uint32_t PRIVATE_KEY_SIZE {228U};
 
    static constexpr uint32_t const RAW_SIGNATURE_SIZE {64U}; // AXIVION Line AutosarC++19_03-M11.0.1: constant declaration is allowed
 
    static constexpr size_t PUBKEY_POINT_LENGTH {32U};
 
    static constexpr size_t PUB_DER_MAX_BYTES {94U};
 
    static bool generateKeyPair(uint8_t privateKey[PRIVATE_KEY_SIZE], uint8_t publicKey[PUBLIC_KEY_SIZE], uint8_t const* pInitBuffer, uint32_t const initBufferSize);
 
    static uint32_t writeSignature(uint8_t const privateKey[PRIVATE_KEY_SIZE], uint8_t const* pMessage, uint32_t const messageSize, uint8_t signature[MAX_SIGNATURE_SIZE]);
 
    static bool verifySignature(uint8_t const publicKey[PUBLIC_KEY_SIZE], uint8_t const* pSignature, uint32_t const signatureSize, uint8_t const* pMessage, uint32_t const messageSize);
 
    static bool parseAsn1Signature(uint8_t const* pSignature, uint32_t const signatureSize, uint8_t rawSignature[RAW_SIGNATURE_SIZE]);
 
    static size_t createAsn1Signature(uint8_t const rawSignature[RAW_SIGNATURE_SIZE], uint8_t signature[MAX_SIGNATURE_SIZE]);
 
    static size_t createPublicKeyAsn1(uint8_t const pKeyX[PUBKEY_POINT_LENGTH], uint8_t const pKeyY[PUBKEY_POINT_LENGTH], core::util::Span<uint8_t> publicKey);
};
 
} // namespace crypto
} // namespace lib
} // namespace base
} // namespace imt
 
#endif // IMT_BASE_LIB_CRYPTO_ELLIPTICCURVEDSA_H