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hai007
05ae5583f8
them with chromium ::crypto symbols of the same names. PiperOrigin-RevId: 684566882
66 lines
2.4 KiB
C++
66 lines
2.4 KiB
C++
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of 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,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef THIRD_PARTY_NEARBY_INTERNAL_CRYPTO_EC_SIGNATURE_CREATOR_H_
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#define THIRD_PARTY_NEARBY_INTERNAL_CRYPTO_EC_SIGNATURE_CREATOR_H_
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#include <stdint.h>
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#include <memory>
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#include <string>
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#include <vector>
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#include "absl/types/span.h"
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#include "internal/crypto_cros/crypto_export.h"
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namespace nearby::crypto {
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class ECPrivateKey;
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class ECSignatureCreator;
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// Signs data using a bare private key (as opposed to a full certificate).
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// We need this class because SignatureCreator is hardcoded to use
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// RSAPrivateKey.
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class CRYPTO_EXPORT ECSignatureCreator {
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public:
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virtual ~ECSignatureCreator() {}
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// Create an instance. The caller must ensure that the provided PrivateKey
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// instance outlives the created ECSignatureCreator.
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// TODO(rch): This is currently hard coded to use SHA256. Ideally, we should
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// pass in the hash algorithm identifier.
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static std::unique_ptr<ECSignatureCreator> Create(ECPrivateKey* key);
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// Signs |data| and writes the results into |signature| as a DER encoded
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// ECDSA-Sig-Value from RFC 3279.
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//
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// ECDSA-Sig-Value ::= SEQUENCE {
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// r INTEGER,
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// s INTEGER }
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virtual bool Sign(absl::Span<const uint8_t> data,
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std::vector<uint8_t>* signature) = 0;
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// DecodeSignature converts from a DER encoded ECDSA-Sig-Value (as produced
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// by Sign) to a `raw' ECDSA signature which consists of a pair of
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// big-endian, zero-padded, 256-bit integers, r and s. On success it returns
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// true and puts the raw signature into |out_raw_sig|.
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// (Only P-256 signatures are supported.)
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virtual bool DecodeSignature(const std::vector<uint8_t>& signature,
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std::vector<uint8_t>* out_raw_sig) = 0;
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};
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} // namespace nearby::crypto
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#endif // THIRD_PARTY_NEARBY_INTERNAL_CRYPTO_EC_SIGNATURE_CREATOR_H_
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