39 lines
1.4 KiB
C++
39 lines
1.4 KiB
C++
// Copyright 2021 The Pigweed Authors
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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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#pragma once
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#include "pw_bytes/span.h"
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#include "pw_status/status.h"
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namespace pw::crypto::ecdsa {
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// VerifyP256Signature verifies the `signature` of `digest` using `public_key`.
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//
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// `public_key` is a byte string in SEC 1 uncompressed form (0x04||X||Y), which
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// is exactly 65 bytes. Compressed forms (02/03||X) *may* not be supported
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// by some backends, e.g. Mbed TLS.
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//
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// `digest` is a raw byte string, truncated to 32 bytes.
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//
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// `signature` is a raw byte string (r||s) of exactly 64 bytes.
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//
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// Returns Status::OkStatus() for a successful verification, or an error Status
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// otherwise.
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Status VerifyP256Signature(ConstByteSpan public_key,
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ConstByteSpan digest,
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ConstByteSpan signature);
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} // namespace pw::crypto::ecdsa
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