selfpass/sp/commands/decrypt.go

51 lines
1.1 KiB
Go

package commands
import (
"fmt"
"io/ioutil"
"os"
"github.com/spf13/cobra"
"github.com/mitchell/selfpass/sp/crypto"
"github.com/mitchell/selfpass/sp/types"
)
func makeDecrypt(repo types.ConfigRepo) *cobra.Command {
decryptCmd := &cobra.Command{
Use: "decrypt [file]",
Short: "Decrypt a file using your masterpass and secret key",
Long: `Decrypt a file using your masterpass and secret key, and replace the old file with
the new file.`,
Args: cobra.ExactArgs(1),
Run: func(cmd *cobra.Command, args []string) {
masterpass, cfg, err := repo.OpenConfig()
check(err)
file := args[0]
fileout := file
if file[len(file)-4:] == ".enc" {
fileout = file[:len(file)-4]
}
contents, err := ioutil.ReadFile(file)
check(err)
key := cfg.GetString(types.KeyPrivateKey)
passkey := crypto.GeneratePBKDF2Key([]byte(masterpass), []byte(key))
contents, err = crypto.GCMDecrypt(passkey, contents)
check(err)
check(ioutil.WriteFile(fileout, contents, 0600))
check(os.Remove(file))
fmt.Println("Decrypted file: ", fileout)
},
}
return decryptCmd
}