Golang RSA-OAEP Encrypt&Decrypt

golang_rsa_oaep.go

package main

import (
	"crypto/rand"
	"crypto/rsa"
	"crypto/sha1"
	"crypto/x509"
	"encoding/base64"
	"encoding/pem"
	"fmt"
)

func main() {
	var publicKeyData = `-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAygGoUiTD+LjwZIgwFZyj
iibWNQ2LM9xZ2pjKQGP8iUBtAuAW629/Ofw8qxToMyixPrG4A7j8+KOPwYrWPGV6
Og//4zm3cG+1hQvnNUWtMjHHBY8OByUPQ6/T8XHER1DxFBfnWfFLZ1yFX6oNNuvt
LgOreI6ehehJd5IB/4mOjMvFEBgOEejado2n55VNdcFpdQ3RcvGV+f/rl/lsIM08
QvL3lc5gqawj53sW9YZi1DL/uN48R+ghvAYhtx2jpHDBvlH1NCF1rU6CynYsgV9Q
Iksv0ihwl4T+k5F9ir0uv0WIS6kKKS1SRpAprRKunos4PlE8l2+jC6LaJUPhDZlj
/wIDAQAB
-----END PUBLIC KEY-----
`
	var privateKeyData = `
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
`
	pubKeyBlock, _ := pem.Decode([]byte(publicKeyData))
	hash := sha1.New()
	random := rand.Reader
	msg := []byte("helloworldjemyme")
	var pub *rsa.PublicKey
	pubInterface, parseErr := x509.ParsePKIXPublicKey(pubKeyBlock.Bytes)
	if parseErr != nil {
		fmt.Println("Load public key error")
		panic(parseErr)
	}
	pub = pubInterface.(*rsa.PublicKey)
	encryptedData, encryptErr := rsa.EncryptOAEP(hash, random, pub, msg, nil)
	if encryptErr != nil {
		fmt.Println("Encrypt data error")
		panic(encryptErr)
	}
	encodedData := base64.URLEncoding.EncodeToString(encryptedData)
	fmt.Println(encodedData)
	fmt.Println()
	fmt.Println("------I AM JUST A LINE------")
	fmt.Println()
	privateKeyBlock, _ := pem.Decode([]byte(privateKeyData))
	var pri *rsa.PrivateKey
	pri, parseErr = x509.ParsePKCS1PrivateKey(privateKeyBlock.Bytes)
	if parseErr != nil {
		fmt.Println("Load private key error")
		panic(parseErr)
	}
	decryptedData, decryptErr := rsa.DecryptOAEP(hash, random, pri, encryptedData, nil)
	if decryptErr != nil {
		fmt.Println("Decrypt data error")
		panic(decryptErr)
	}
	fmt.Println(string(decryptedData))
}