55 lines
1.9 KiB
C
55 lines
1.9 KiB
C
// Copyright 2021 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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#ifndef DICE_OPS_TRAIT_COSE_H_
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#define DICE_OPS_TRAIT_COSE_H_
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#include <dice/config.h>
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#include <dice/dice.h>
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#include <stddef.h>
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#include <stdint.h>
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// These functions may optionally be implemented by a COSE based integration.
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// They aren't directly depended on by the main DICE functions but provide
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// extra utilities that can be used as part of the integration.
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Encodes a public key into |buffer| as a COSE_Key structure, setting
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// |encoded_size| to the number of bytes used.
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DiceResult DiceCoseEncodePublicKey(
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void* context, const uint8_t public_key[DICE_PUBLIC_KEY_SIZE],
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size_t buffer_size, uint8_t* buffer, size_t* encoded_size);
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// Signs the payload and additional authenticated data, formatting the result
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// into a COSE_Sign1 structure. There are no unprotected attributes included in
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// the result.
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//
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// |buffer| is used to hold the intermediate To-Be-Signed (TBS) structure and
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// then the final result. |encoded_size| is set to the size of the final result
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// in |buffer|.
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DiceResult DiceCoseSignAndEncodeSign1(
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void* context, const uint8_t* payload, size_t payload_size,
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const uint8_t* aad, size_t aad_size,
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const uint8_t private_key[DICE_PRIVATE_KEY_SIZE], size_t buffer_size,
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uint8_t* buffer, size_t* encoded_size);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // DICE_OPS_TRAIT_COSE_H_
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