예제 #1
0
// UnmarshalSecretStore decrypts and parses the secret store contained
// in the input byte slice.
func UnmarshalSecretStore(in, passphrase []byte, m secret.ScryptMode) (*SecretStore, bool) {
	if len(in) < saltSize {
		return nil, false
	}

	salt := in[:saltSize]
	enc := in[saltSize:]
	key := secret.DeriveKeyStrength(passphrase, salt, m)
	if key == nil {
		return nil, false
	}
	defer util.Zero(key[:])

	data, ok := secret.Decrypt(key, enc)
	if !ok {
		util.Errorf("decrypt fails")
		return nil, false
	}
	defer util.Zero(data)

	var store SecretStore
	err := json.Unmarshal(data, &store)
	if err != nil {
		util.Errorf("encrypt fails")
		return nil, false
	}

	store.passphrase = make([]byte, len(passphrase))
	copy(store.passphrase, passphrase)
	return &store, true
}
예제 #2
0
파일: crypto.go 프로젝트: kisom/cryptutils
// UnlockKey recovers the secured private key with the passphrase.
func UnlockKey(locked, passphrase []byte) (*PrivateKey, bool) {
	if len(locked) <= saltSize {
		return nil, false
	}
	salt := locked[:saltSize]
	locked = locked[saltSize:]

	key := secret.DeriveKey(passphrase, salt)
	defer util.Zero(key[:])

	out, ok := secret.Decrypt(key, locked)
	if !ok {
		return nil, false
	}
	defer util.Zero(out)

	priv, err := UnmarshalPrivate(out)
	if err != nil {
		return nil, false
	}
	return priv, true
}
예제 #3
0
func main() {
	flArmour := flag.Bool("a", false, "armour output")
	flOutDir := flag.String("o", ".", "output directory")
	flOutfile := flag.String("f", "passcrypt.enc", "pack file")
	flShowManifest := flag.Bool("l", false, "list the files in the archive")
	flUnpack := flag.Bool("u", false, "unpack the archive")
	flag.BoolVar(&verbose, "v", false, "verbose mode")
	flVersion := flag.Bool("V", false, "display version and exit")
	flag.Parse()

	if *flVersion {
		fmt.Println("passcrypt version", util.VersionString())
		os.Exit(0)
	}

	if *flUnpack || *flShowManifest {
		if flag.NArg() != 1 {
			util.Errorf("Only one file may be unpacked at a time.\n")
			os.Exit(1)
		}

		in, err := ioutil.ReadFile(flag.Arg(0))
		if err != nil {
			util.Errorf("%v\n", err)
			os.Exit(1)
		}

		if p, _ := pem.Decode(in); p != nil {
			if p.Type != header {
				util.Errorf("Wrong header for archive.\n")
				os.Exit(1)
			}
			in = p.Bytes
		}

		if len(in) <= saltLength {
			util.Errorf("Invalid archive.\n")
			os.Exit(1)
		}
		salt := in[:saltLength]
		in = in[saltLength:]

		passphrase, err := readpass.PasswordPromptBytes("Password: "******"%v\n", err)
			os.Exit(1)
		}

		key := secret.DeriveKey(passphrase, salt)
		if key == nil {
			util.Errorf("Failed to derive key.n\n")
			os.Exit(1)
		}

		in, ok := secret.Decrypt(key, in)
		if !ok {
			util.Errorf("Decryption failed.\n")
			os.Exit(1)
		}
		defer util.Zero(in)

		if *flUnpack {
			err = unpackFiles(in, *flOutDir)
			if err != nil {
				util.Errorf("%v\n", err)
				os.Exit(1)
			}
		} else if *flShowManifest {
			var files []File
			_, err := asn1.Unmarshal(in, &files)
			if err != nil {
				util.Errorf("%v\n", err)
				os.Exit(1)
			}

			fmt.Println("Manifest for", flag.Arg(0))
			fmt.Printf("\n")
			for _, file := range files {
				fmt.Printf("\t%s", file.Path)
				if os.FileMode(file.Mode).IsDir() {
					fmt.Printf("/")
				}
				fmt.Printf("\n")
			}
		}
		return
	}

	if flag.NArg() == 0 {
		return
	}

	passphrase, err := readpass.PasswordPromptBytes("Password: "******"%v\n", err)
		os.Exit(1)
	}

	salt := util.RandBytes(saltLength)
	if salt == nil {
		util.Errorf("Failed to generate a random salt.\n")
		os.Exit(1)
	}

	key := secret.DeriveKey(passphrase, salt)
	if key == nil {
		util.Errorf("Failed to derive key.n\n")
		os.Exit(1)
	}

	out, err := packFiles(flag.Args())
	if err != nil {
		util.Errorf("%v\n", err)
		os.Exit(1)
	}

	var ok bool
	out, ok = secret.Encrypt(key, out)
	if !ok {
		util.Errorf("Encryption failed.\n")
		os.Exit(1)
	}

	out = append(salt, out...)

	if *flArmour {
		p := &pem.Block{
			Type:  header,
			Bytes: out,
		}
		out = pem.EncodeToMemory(p)
	}

	err = ioutil.WriteFile(*flOutfile, out, 0644)
	if err != nil {
		util.Errorf("%v\n", err)
		os.Exit(1)
	}
}