zircon/system/ulib/kms-stateless/include/kms-stateless/kms-stateless.h

#ifndef KMS_STATELESS_KMS_STATELESS_H_
#define KMS_STATELESS_KMS_STATELESS_H_

#include <stdint.h>
#include <fbl/function.h>
#include <fbl/unique_ptr.h>
#include <zircon/types.h>

namespace kms_stateless {
    const size_t kExpectedKeyInfoSize = 32;

    // The callback called when a hardware key is successfully derived. Arguments to the callback
    // is a unique_ptr of the key buffer and the key size.
    using GetHardwareDerivedKeyCallback = fbl::Function<zx_status_t(fbl::unique_ptr<uint8_t>,
                                                                    size_t)>;

    // Get a hardware derived key using
    zx_status_t GetHardwareDerivedKey(GetHardwareDerivedKeyCallback callback,
                                      uint8_t key_info[kExpectedKeyInfoSize]);
}

#endif  // KMS_STATELESS_KMS_STATELESS_H_