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keys: use (*Int).FillBytes where appropriate

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Allows to avoid some allocations. Refs. #1319.
This commit is contained in:
Roman Khimov 2021-08-25 20:03:40 +03:00
parent 76eca07961
commit f4ba21a41a
1 changed files with 3 additions and 5 deletions
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8
pkg/crypto/keys/private_key.go
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@ -155,10 +155,9 @@ func (p *PrivateKey) SignHashable(net uint32, hh hash.Hashable) []byte {
func getSignatureSlice(curve elliptic.Curve, r, s *big.Int) []byte {
params := curve.Params()
curveOrderByteSize := params.P.BitLen() / 8
rBytes, sBytes := r.Bytes(), s.Bytes()
signature := make([]byte, curveOrderByteSize*2)
copy(signature[curveOrderByteSize-len(rBytes):], rBytes)
copy(signature[curveOrderByteSize*2-len(sBytes):], sBytes)
_ = r.FillBytes(signature[:curveOrderByteSize])
_ = s.FillBytes(signature[curveOrderByteSize:])
return signature
}
@ -170,9 +169,8 @@ func (p *PrivateKey) String() string {
// Bytes returns the underlying bytes of the PrivateKey.
func (p *PrivateKey) Bytes() []byte {
bytes := p.D.Bytes()
result := make([]byte, 32)
copy(result[32-len(bytes):], bytes)
_ = p.D.FillBytes(result)
return result
}