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xc.go
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xc.go
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package xc
import (
"context"
"io/ioutil"
"os"
"strings"
"github.com/justwatchcom/gopass/pkg/action"
"github.com/justwatchcom/gopass/pkg/agent/client"
"github.com/justwatchcom/gopass/pkg/backend/crypto/xc"
"github.com/justwatchcom/gopass/pkg/config"
"github.com/justwatchcom/gopass/pkg/fsutil"
"github.com/justwatchcom/gopass/pkg/out"
"github.com/justwatchcom/gopass/pkg/termio"
"github.com/urfave/cli"
)
var crypto *xc.XC
func initCrypto() error {
if crypto != nil {
return nil
}
cfgdir := config.Directory()
c, err := xc.New(cfgdir, client.New(cfgdir))
if err != nil {
return err
}
crypto = c
return nil
}
// ListPrivateKeys list the XC private keys
func ListPrivateKeys(ctx context.Context, c *cli.Context) error {
if err := initCrypto(); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to init XC")
}
kl, err := crypto.ListPrivateKeyIDs(ctx)
if err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to list private keys")
}
out.Print(ctx, "XC Private Keys:")
for _, key := range kl {
out.Print(ctx, "%s - %s", key, crypto.FormatKey(ctx, key))
}
return nil
}
// ListPublicKeys lists the XC public keys
func ListPublicKeys(ctx context.Context, c *cli.Context) error {
if err := initCrypto(); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to init XC")
}
kl, err := crypto.ListPublicKeyIDs(ctx)
if err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to list public keys")
}
out.Print(ctx, "XC Public Keys:")
for _, key := range kl {
out.Print(ctx, "%s - %s", key, crypto.FormatKey(ctx, key))
}
return nil
}
// GenerateKeypair generates a new XC keypair
func GenerateKeypair(ctx context.Context, c *cli.Context) error {
if err := initCrypto(); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to init XC")
}
name := c.String("name")
email := c.String("email")
pw := c.String("passphrase")
if name == "" {
var err error
name, err = termio.AskForString(ctx, "What is your full name?", "")
if err != nil || name == "" {
return action.ExitError(ctx, action.ExitNoName, err, "please provide a name")
}
}
if email == "" {
var err error
email, err = termio.AskForString(ctx, "What is your email?", "")
if err != nil || email == "" {
return action.ExitError(ctx, action.ExitNoName, err, "please provide an email")
}
}
if pw == "" {
var err error
pw, err = termio.AskForPassword(ctx, "")
if err != nil || pw == "" {
return action.ExitError(ctx, action.ExitIO, err, "failed to ask for password: %s", err)
}
}
return crypto.CreatePrivateKeyBatch(ctx, name, email, pw)
}
// ExportPublicKey exports an XC key
func ExportPublicKey(ctx context.Context, c *cli.Context) error {
if err := initCrypto(); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to init XC")
}
id := c.String("id")
file := c.String("file")
if id == "" {
return action.ExitError(ctx, action.ExitUsage, nil, "need id")
}
if file == "" {
return action.ExitError(ctx, action.ExitUsage, nil, "need file")
}
if fsutil.IsFile(file) {
return action.ExitError(ctx, action.ExitUnknown, nil, "output file already exists")
}
pk, err := crypto.ExportPublicKey(ctx, id)
if err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to export key: %s", err)
}
if err := ioutil.WriteFile(file, pk, 0600); err != nil {
return action.ExitError(ctx, action.ExitIO, err, "failed to write file")
}
return nil
}
// ImportPublicKey imports an XC key
func ImportPublicKey(ctx context.Context, c *cli.Context) error {
if err := initCrypto(); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to init XC")
}
file := c.String("file")
if file == "" {
return action.ExitError(ctx, action.ExitUsage, nil, "need file")
}
if !fsutil.IsFile(file) {
return action.ExitError(ctx, action.ExitNotFound, nil, "input file not found")
}
buf, err := ioutil.ReadFile(file)
if err != nil {
return action.ExitError(ctx, action.ExitIO, err, "failed to read file")
}
return crypto.ImportPublicKey(ctx, buf)
}
// RemoveKey removes a key from the keyring
func RemoveKey(ctx context.Context, c *cli.Context) error {
if err := initCrypto(); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to init XC")
}
id := c.String("id")
if id == "" {
return action.ExitError(ctx, action.ExitUsage, nil, "need id")
}
return crypto.RemoveKey(id)
}
// ExportPrivateKey exports an XC key
func ExportPrivateKey(ctx context.Context, c *cli.Context) error {
if err := initCrypto(); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to init XC")
}
id := c.String("id")
file := c.String("file")
if id == "" {
return action.ExitError(ctx, action.ExitUsage, nil, "need id")
}
if file == "" {
return action.ExitError(ctx, action.ExitUsage, nil, "need file")
}
if fsutil.IsFile(file) {
return action.ExitError(ctx, action.ExitUnknown, nil, "output file already exists")
}
pk, err := crypto.ExportPrivateKey(ctx, id)
if err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to export key: %s", err)
}
if err := ioutil.WriteFile(file, pk, 0600); err != nil {
return action.ExitError(ctx, action.ExitIO, err, "failed to write file")
}
return nil
}
// ImportPrivateKey imports an XC key
func ImportPrivateKey(ctx context.Context, c *cli.Context) error {
if err := initCrypto(); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to init XC")
}
file := c.String("file")
if file == "" {
return action.ExitError(ctx, action.ExitUsage, nil, "need file")
}
if !fsutil.IsFile(file) {
return action.ExitError(ctx, action.ExitNotFound, nil, "input file not found")
}
buf, err := ioutil.ReadFile(file)
if err != nil {
return action.ExitError(ctx, action.ExitIO, err, "failed to read file")
}
return crypto.ImportPrivateKey(ctx, buf)
}
// EncryptFile encrypts a single file
func EncryptFile(ctx context.Context, c *cli.Context) error {
if err := initCrypto(); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to init XC")
}
if c.Bool("stream") {
return EncryptFileStream(ctx, c)
}
inFile := c.String("file")
if inFile == "" {
return action.ExitError(ctx, action.ExitUsage, nil, "need file")
}
recipients := c.StringSlice("recipients")
outFile := inFile + ".xc"
if !fsutil.IsFile(inFile) {
return action.ExitError(ctx, action.ExitNotFound, nil, "input file not found")
}
if fsutil.IsFile(outFile) {
return action.ExitError(ctx, action.ExitIO, nil, "output file already exists")
}
plaintext, err := ioutil.ReadFile(inFile)
if err != nil {
return action.ExitError(ctx, action.ExitIO, err, "failed to read file")
}
ciphertext, err := crypto.Encrypt(ctx, plaintext, recipients)
if err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to encrypt file: %s", err)
}
if err := ioutil.WriteFile(outFile, ciphertext, 0600); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to write ciphertext")
}
return nil
}
// DecryptFile decrypts a single file
func DecryptFile(ctx context.Context, c *cli.Context) error {
if err := initCrypto(); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to init XC")
}
if c.Bool("stream") {
return DecryptFileStream(ctx, c)
}
inFile := c.String("file")
if inFile == "" {
return action.ExitError(ctx, action.ExitUsage, nil, "need file")
}
if !strings.HasSuffix(inFile, ".xc") {
return action.ExitError(ctx, action.ExitUsage, nil, "unknown extension. expecting .xc")
}
outFile := strings.TrimSuffix(inFile, ".xc")
if !fsutil.IsFile(inFile) {
return action.ExitError(ctx, action.ExitNotFound, nil, "input file not found")
}
if fsutil.IsFile(outFile) {
return action.ExitError(ctx, action.ExitIO, nil, "output file already exists")
}
ciphertext, err := ioutil.ReadFile(inFile)
if err != nil {
return action.ExitError(ctx, action.ExitIO, err, "failed to read file")
}
plaintext, err := crypto.Decrypt(ctx, ciphertext)
if err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to decrypt file: %s", err)
}
if err := ioutil.WriteFile(outFile, plaintext, 0600); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to write plaintext")
}
return nil
}
// EncryptFileStream encrypts a single file
func EncryptFileStream(ctx context.Context, c *cli.Context) error {
if err := initCrypto(); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to init XC")
}
inFile := c.String("file")
if inFile == "" {
return action.ExitError(ctx, action.ExitUsage, nil, "need file")
}
recipients := c.StringSlice("recipients")
outFile := inFile + ".xc"
if !fsutil.IsFile(inFile) {
return action.ExitError(ctx, action.ExitNotFound, nil, "input file not found")
}
if fsutil.IsFile(outFile) {
return action.ExitError(ctx, action.ExitIO, nil, "output file already exists")
}
plaintext, err := os.Open(inFile)
if err != nil {
return action.ExitError(ctx, action.ExitIO, err, "failed to open file")
}
defer func() { _ = plaintext.Close() }()
ciphertext, err := os.OpenFile(outFile, os.O_CREATE|os.O_WRONLY, 0600)
if err != nil {
return action.ExitError(ctx, action.ExitIO, err, "failed to open file")
}
defer func() { _ = ciphertext.Close() }()
if err := crypto.EncryptStream(ctx, plaintext, recipients, ciphertext); err != nil {
_ = os.Remove(outFile)
return action.ExitError(ctx, action.ExitUnknown, err, "failed to encrypt file: %s", err)
}
return nil
}
// DecryptFileStream decrypts a single file
func DecryptFileStream(ctx context.Context, c *cli.Context) error {
if err := initCrypto(); err != nil {
return action.ExitError(ctx, action.ExitUnknown, err, "failed to init XC")
}
inFile := c.String("file")
if inFile == "" {
return action.ExitError(ctx, action.ExitUsage, nil, "need file")
}
if !strings.HasSuffix(inFile, ".xc") {
return action.ExitError(ctx, action.ExitUsage, nil, "unknown extension. expecting .xc")
}
outFile := strings.TrimSuffix(inFile, ".xc")
if !fsutil.IsFile(inFile) {
return action.ExitError(ctx, action.ExitNotFound, nil, "input file not found")
}
if fsutil.IsFile(outFile) {
return action.ExitError(ctx, action.ExitIO, nil, "output file already exists")
}
ciphertext, err := os.Open(inFile)
if err != nil {
return action.ExitError(ctx, action.ExitIO, err, "failed to read file")
}
defer func() { _ = ciphertext.Close() }()
plaintext, err := os.OpenFile(outFile, os.O_CREATE|os.O_WRONLY, 0600)
if err != nil {
return action.ExitError(ctx, action.ExitIO, err, "failed to read file")
}
defer func() { _ = plaintext.Close() }()
if err := crypto.DecryptStream(ctx, ciphertext, plaintext); err != nil {
_ = os.Remove(outFile)
return action.ExitError(ctx, action.ExitUnknown, err, "failed to decrypt file: %s", err)
}
return nil
}