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package gpg
// Package gpg wraps around the gpg command line tool and exposes some of its functionality
import (
"bytes"
"os/exec"
)
// Signer implements objects.Signer using gpg
type Signer struct {
Key string
}
func filter(cmd *exec.Cmd, b []byte) ([]byte, error) {
cmd.Stdin = bytes.NewReader(b)
var out bytes.Buffer
cmd.Stdout = &out
err := cmd.Run()
return out.Bytes(), err
}
// Sign signs a message b with the key s.Key
func (s Signer) Sign(b []byte) ([]byte, error) {
cmd := exec.Command("gpg", "--clearsign", "-u", s.Key)
return filter(cmd, b)
}
// Verifyer implements objects.Verifyer using gpg
type Verifyer struct{}
// Verify verifies the signed message b
func (Verifyer) Verify(b []byte) error {
cmd := exec.Command("gpg", "--verify")
cmd.Stdin = bytes.NewReader(b)
return cmd.Run()
}
type Encrypter struct {
Key string
}
func (e Encrypter) Encrypt(b []byte) ([]byte, error) {
cmd := exec.Command("gpg", "--encrypt", "--recipient", e.Key)
return filter(cmd, b)
}
type Decrypter struct{}
func (Decrypter) Decrypt(b []byte) ([]byte, error) {
cmd := exec.Command("gpg", "--decrypt")
return filter(cmd, b)
}
type Crypter struct {
Encrypter
Decrypter
}
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