salt/random_salt_generator.h

// Copyright 2026 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
//
//    https://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 THIRD_PARTY_CREDENTIO_SALT_RANDOM_SALT_GENERATOR_H_
#define THIRD_PARTY_CREDENTIO_SALT_RANDOM_SALT_GENERATOR_H_

#include <string>

#include "absl/status/statusor.h"
#include "salt/salt_generator.h"

namespace credentio {

// Generates salts of `kDefaultSaltLength` bytes from a cryptographically secure
// pseudorandom number generator, for use as C2PA salts (C2PA specification v2.2
// Section 8.4.2.3). Thread-safe.
class RandomSaltGenerator final : public SaltGenerator {
 public:
  // Returns a process-wide instance.
  static const RandomSaltGenerator& Default();

  absl::StatusOr<std::string> Generate() const override;
};

}  // namespace credentio

#endif  // THIRD_PARTY_CREDENTIO_SALT_RANDOM_SALT_GENERATOR_H_