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// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef TINK_JWT_JWT_MAC_H_
#define TINK_JWT_JWT_MAC_H_
#include <string>
#include "absl/strings/string_view.h"
#include "tink/jwt/jwt_validator.h"
#include "tink/jwt/raw_jwt.h"
#include "tink/jwt/verified_jwt.h"
#include "tink/util/status.h"
#include "tink/util/statusor.h"
namespace crypto {
namespace tink {
///////////////////////////////////////////////////////////////////////////////
// Interface for authenticating and verifying JWT with JWS MAC.
//
// Sees RFC 7519 and RFC 7515. Security guarantees: similar to MAC.
class JwtMac {
public:
// Computes a MAC and encodes the raw JWT token and the MAC in the JWS compact
// serialization format.
virtual crypto::tink::util::StatusOr<std::string> ComputeMacAndEncode(
const RawJwt& token) const = 0;
// Verifies and decodes a JWT token in the JWS compact serialization format.
//
// The JWT is validated against the rules in validator. That is, every claim
// in validator must also be present in the JWT. For example, if validator
// contains an issuer (iss) claim, the JWT must contain an identical claim.
// The JWT can contain claims that are NOT in the validator. However, if the
// JWT contains a list of audiences, the validator must also contain an
// audience in the list.
//
// If the JWT contains timestamp claims such as expiration (exp), issued_at
// (iat) or not_before (nbf), they will also be validated. validator allows to
// set a clock skew, to deal with small clock differences among different
// machines.
virtual crypto::tink::util::StatusOr<VerifiedJwt> VerifyMacAndDecode(
absl::string_view compact, const JwtValidator& validator) const = 0;
virtual ~JwtMac() = default;
};
} // namespace tink
} // namespace crypto
#endif // TINK_JWT_JWT_MAC_H_
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