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sign.go
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sign.go
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package rsa
import (
"errors"
"crypto/rsa"
"crypto/rand"
"github.com/deatil/go-cryptobin/tool"
)
// 私钥签名
func (this Rsa) Sign() Rsa {
if this.privateKey == nil {
err := errors.New("Rsa: privateKey error.")
return this.AppendError(err)
}
hash, err := tool.GetCryptoHash(this.signHash)
if err != nil {
return this.AppendError(err)
}
hashed, err := tool.CryptoHashSum(this.signHash, this.data)
if err != nil {
return this.AppendError(err)
}
paredData, err := rsa.SignPKCS1v15(rand.Reader, this.privateKey, hash, hashed)
this.paredData = paredData
return this.AppendError(err)
}
// 公钥验证
// 使用原始数据[data]对比签名后数据
func (this Rsa) Verify(data []byte) Rsa {
if this.publicKey == nil {
err := errors.New("Rsa: publicKey error.")
return this.AppendError(err)
}
hash, err := tool.GetCryptoHash(this.signHash)
if err != nil {
return this.AppendError(err)
}
hashed, err := tool.CryptoHashSum(this.signHash, data)
if err != nil {
return this.AppendError(err)
}
err = rsa.VerifyPKCS1v15(this.publicKey, hash, hashed, this.data)
if err != nil {
return this.AppendError(err)
}
this.verify = true
return this
}