以太坊椭圆曲线Specp256k1经过消息的hash和签名（对消息的hash的签名）来恢复出公钥和计算r值

时间 2019-12-13

标签以太椭圆曲线 specp256k1 specp 经过消息 hash 签名复出计算繁體版

原文原文链接

源代码 https://github.com/ethereum/go-ethereum/blob/master/crypto/secp256k1/secp256.go git

// RecoverPubkey returns the the public key of the signer.

// msg must be the 32-byte hash of the message to be signed.

// sig must be a 65-byte compact ECDSA signature containing the

// recovery id as the last element.

RecoverPubkey(msg []byte, sig []byte)

其中”sig must be a 65-byte compact ECDSA signature containing the recovery id as the last element.“，说明了最后一个recovery id指的是 rG的x坐标。github

。。。细节以后解释。element