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// A base class for verifying signatures of unstructured data. This class is
// mockable.
#ifndef CERT_TRANS_LOG_VERIFIER_H_
#define CERT_TRANS_LOG_VERIFIER_H_
#include <openssl/evp.h>
#include <openssl/x509.h> // for i2d_PUBKEY
#include <stdint.h>
#include "base/macros.h"
#include "proto/ct.pb.h"
#include "util/openssl_scoped_types.h"
namespace cert_trans {
class Verifier {
public:
enum Status {
OK,
HASH_ALGORITHM_MISMATCH,
SIGNATURE_ALGORITHM_MISMATCH,
INVALID_SIGNATURE,
};
explicit Verifier(EVP_PKEY* pkey);
virtual ~Verifier() = default;
virtual std::string KeyID() const;
virtual Status Verify(const std::string& input,
const ct::DigitallySigned& signature) const;
static std::string ComputeKeyID(EVP_PKEY* pkey);
protected:
// A constructor for mocking.
Verifier();
private:
bool RawVerify(const std::string& data, const std::string& sig_string) const;
ScopedEVP_PKEY pkey_;
ct::DigitallySigned::HashAlgorithm hash_algo_;
ct::DigitallySigned::SignatureAlgorithm sig_algo_;
std::string key_id_;
DISALLOW_COPY_AND_ASSIGN(Verifier);
};
} // namespace cert_trans
#endif // CERT_TRANS_LOG_VERIFIER_H_
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