58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
// Copyright 2022 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 BORINGSSL_ECDSA_UTILS_H_
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#define BORINGSSL_ECDSA_UTILS_H_
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#include <stddef.h>
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#include <stdint.h>
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#include "dice/dice.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define P384_PRIVATE_KEY_SIZE 48
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#define P384_PUBLIC_KEY_SIZE 96
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#define P384_SIGNATURE_SIZE 96
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// Deterministically generates a public and private key pair from |seed|.
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// Since this is deterministic, |seed| is as sensitive as a private key and can
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// be used directly as the private key. The |private_key| may use an
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// implementation defined format so may only be passed to the |sign| operation.
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int P384KeypairFromSeed(uint8_t public_key[P384_PUBLIC_KEY_SIZE],
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uint8_t private_key[P384_PRIVATE_KEY_SIZE],
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const uint8_t seed[DICE_PRIVATE_KEY_SEED_SIZE]);
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// Calculates a signature of |message_size| bytes from |message| using
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// |private_key|. |private_key| was generated by |keypair_from_seed| to allow
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// an implementation to use their own private key format. |signature| points to
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// the buffer where the calculated signature is written.
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int P384Sign(uint8_t signature[P384_SIGNATURE_SIZE], const uint8_t* message,
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size_t message_size,
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const uint8_t private_key[P384_PRIVATE_KEY_SIZE]);
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// Verifies, using |public_key|, that |signature| covers |message_size| bytes
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// from |message|.
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int P384Verify(const uint8_t* message, size_t message_size,
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const uint8_t signature[P384_SIGNATURE_SIZE],
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const uint8_t public_key[P384_PUBLIC_KEY_SIZE]);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // BORINGSSL_ECDSA_UTILS_H_
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