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signature.go
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signature.go
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/*
* Copyright (C) 2021 Zilliqa
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package core
import (
"math/big"
)
type Signature struct {
R *big.Int
S *big.Int
}
func (s *Signature) Serialize(data []byte, offset uint) []byte {
bns := BIGNumSerialize{}
data = bns.SetNumber(data, offset, signatureChallengeSize, s.R)
data = bns.SetNumber(data, offset+signatureChallengeSize, signatureChallengeSize, s.S)
return data
}
func NewFromByteArray(bytes []byte) *Signature {
rb := make([]byte, 32)
sb := make([]byte, 32)
copy(rb, bytes[0:32])
copy(sb, bytes[32:])
r := new(big.Int).SetBytes(rb)
s := new(big.Int).SetBytes(sb)
return &Signature{
R: r,
S: s,
}
}
type CoSignatures struct {
CS1 *Signature
B1 []bool
CS2 *Signature
B2 []bool
}