43 lines
1.3 KiB
Go
43 lines
1.3 KiB
Go
// Copyright 2020 The gVisor Authors.
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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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// http://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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//go:build go1.1
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// +build go1.1
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package crypto
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import (
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/sha512"
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"fmt"
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"math/big"
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)
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// EcdsaP384Sha384Verify verifies the signature in r, s of hash using ECDSA
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// P384 + SHA 384 and the public key, pub. Its return value records whether
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// the signature is valid.
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func EcdsaP384Sha384Verify(pub *ecdsa.PublicKey, data []byte, r, s *big.Int) (bool, error) {
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if pub.Curve != elliptic.P384() {
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return false, fmt.Errorf("unsupported key curve: want P-384, got %v", pub.Curve)
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}
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digest := sha512.Sum384(data)
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return ecdsa.Verify(pub, digest[:], r, s), nil
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}
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// SumSha384 returns the SHA384 checksum of the data.
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func SumSha384(data []byte) ([sha512.Size384]byte, error) {
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return sha512.Sum384(data), nil
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}
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