github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/crypto/crypto_stdlib.go (about)

     1  // Copyright 2020 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package crypto
    16  
    17  import (
    18  	"crypto/ecdsa"
    19  	"crypto/sha512"
    20  	"math/big"
    21  )
    22  
    23  // EcdsaVerify verifies the signature in r, s of hash using ECDSA and the
    24  // public key, pub. Its return value records whether the signature is valid.
    25  func EcdsaVerify(pub *ecdsa.PublicKey, hash []byte, r, s *big.Int) (bool, error) {
    26  	return ecdsa.Verify(pub, hash, r, s), nil
    27  }
    28  
    29  // SumSha384 returns the SHA384 checksum of the data.
    30  func SumSha384(data []byte) ([sha512.Size384]byte, error) {
    31  	return sha512.Sum384(data), nil
    32  }