gpg decrypt

decrypt.go

package main

import (
	"code.google.com/p/go.crypto/openpgp"
	"github.com/qiniu/log"
	"io/ioutil"
	"os"
)

func main() {

	sk, err := os.Open("secring.gpg")
	logfatal(err)
	kring, err := openpgp.ReadKeyRing(sk)
	sk.Close()
	logfatal(err)

	passphrase := []byte("pass")
	for _, entity := range kring {

		if entity.PrivateKey != nil && entity.PrivateKey.Encrypted {
			err = entity.PrivateKey.Decrypt(passphrase)
			logfatal(err)
		}

		for _, subkey := range entity.Subkeys {
			if subkey.PrivateKey != nil && subkey.PrivateKey.Encrypted {
				err = subkey.PrivateKey.Decrypt(passphrase)
				logfatal(err)
			}
		}
	}

	eb, err := os.Open("xx")
	logfatal(err)
	defer eb.Close()
	md, err := openpgp.ReadMessage(eb, kring, nil, nil)
	logfatal(err)

	plain, err := ioutil.ReadAll(md.UnverifiedBody)
	logfatal(err)
	err = ioutil.WriteFile("xxx", plain, 0666)
	logfatal(err)
}

func logfatal(err error) {
	if err != nil {
		log.Fatal(err)
	}
}