sha.cpp

#include <vanetza/security/sha.hpp>
#ifdef VANETZA_WITH_CRYPTOPP
#include <cryptopp/sha.h>
#endif
#ifdef VANETZA_WITH_OPENSSL
#include <openssl/sha.h>
#endif
 
namespace vanetza
{
namespace security
{
 
Sha256Digest calculate_sha256_digest(const uint8_t* data, std::size_t len)
{
    Sha256Digest digest;
#if defined VANETZA_WITH_OPENSSL
    static_assert(SHA256_DIGEST_LENGTH == digest.size(), "size of OpenSSL SHA256_DIGEST_LENGTH does not match");
    SHA256_CTX ctx;
    SHA256_Init(&ctx);
    SHA256_Update(&ctx, data, len);
    SHA256_Final(digest.data(), &ctx);
#elif defined VANETZA_WITH_CRYPTOPP
    static_assert(CryptoPP::SHA256::DIGESTSIZE == digest.size(), "size of CryptoPP::SHA256 does not match digest");
    CryptoPP::SHA256 hash;
    hash.CalculateDigest(digest.data(), data, len);
#else
#   error "no SHA256 implementation available"
#endif
    return digest;
}
 
Sha384Digest calculate_sha384_digest(const uint8_t* data, std::size_t len)
{
    Sha384Digest digest;
#if defined VANETZA_WITH_OPENSSL
    SHA384(data, len, digest.data());
#elif defined VANETZA_WITH_CRYPTOPP
    static_assert(CryptoPP::SHA384::DIGESTSIZE == digest.size(), "size of CryptoPP::SHA384 does not match digest");
    CryptoPP::SHA384 hash;
    hash.CalculateDigest(digest.data(), data, len);
#else
#   error "no SHA384 implementation available"
#endif
    return digest;
}
 
} // namespace security
} // namespace vanetza