case *sha1Hash:
		return C._goboringcrypto_EVP_sha1()
	case *sha224Hash:
		return C._goboringcrypto_EVP_sha224()
	case *sha256Hash:
		return C._goboringcrypto_EVP_sha256()
	case *sha384Hash:
		return C._goboringcrypto_EVP_sha384()
	case *sha512Hash:
		return C._goboringcrypto_EVP_sha512()
	}
	return nil
}

// cryptoHashToMD converts a crypto.Hash
// to a BoringCrypto *C.GO_EVP_MD.