golang Rsa

package models

import (
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
)

func RsaDecrypt(ciphertext []byte, pri_key []byte) ([]byte, error) {

block, _ := pem.Decode(pri_key)
if block == nil {
return nil, errors.New("invalid rsa private key")
}

priv, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return nil, err
}

return rsa.DecryptPKCS1v15(rand.Reader, priv, ciphertext)
}

func RsaEncrypt(plaintext []byte, pub_key []byte) ([]byte, error) {

block, _ := pem.Decode(pub_key)
if block == nil {
return nil, errors.New("invalid rsa public key")
}

pubInf, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
return nil, err
}
pub := pubInf.(*rsa.PublicKey)
return rsa.EncryptPKCS1v15(rand.Reader, pub, plaintext)
}