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rsasign.go
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rsasign.go
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package goEncrypt
import (
"encoding/pem"
"crypto/x509"
"runtime"
"crypto/sha256"
"crypto/rsa"
"crypto/rand"
"crypto"
"log"
)
/*
@Time : 2018/11/4 17:13
@Author : wuman
@File : RsaSign
@Software: GoLand
*/
func init(){
log.SetFlags(log.Ldate|log.Lshortfile)
}
func RsaSign(msg ,Key []byte)(cryptText []byte,err error){
block, _ := pem.Decode(Key)
defer func(){
if err:=recover();err!=nil{
switch err.(type){
case runtime.Error:
log.Println("runtime err:",err,"Check that the key is correct")
default:
log.Println("error:",err)
}
}
}()
privateKey,err := x509.ParsePKCS1PrivateKey(block.Bytes)
myHash := sha256.New()
myHash.Write(msg)
hashed := myHash.Sum(nil)
sign, err := rsa.SignPKCS1v15(rand.Reader, privateKey, crypto.SHA256, hashed)
if err!=nil{
return nil,err
}
return sign,nil
}
func RsaVerifySign(msg []byte,sign []byte,Key []byte)bool{
block, _ := pem.Decode(Key)
defer func(){
if err:=recover();err!=nil{
switch err.(type){
case runtime.Error:
log.Println("runtime err:",err,"Check that the key is correct")
default:
log.Println("error:",err)
}
}
}()
publicInterface,_ := x509.ParsePKIXPublicKey(block.Bytes)
publicKey:=publicInterface.(*rsa.PublicKey)
myHash := sha256.New()
myHash.Write(msg)
hashed := myHash.Sum(nil)
result := rsa.VerifyPKCS1v15(publicKey, crypto.SHA256, hashed, sign)
return result == nil
}