fix encryption

- moving to crypto/ssh/terminal, which should also work on Windows
  and be better maintained (code.google.com is going away)
- fix support for padding

Closes #2.

gauth.go

@@ -2,7 +2,6 @@ package main
 
 import (
  "bytes"
- "code.google.com/p/gopass"
  "crypto/aes"
  "crypto/cipher"
  "crypto/hmac"
@@ -11,12 +10,14 @@ import (
  "encoding/base32"
  "encoding/csv"
  "fmt"
+ "golang.org/x/crypto/ssh/terminal"
  "io/ioutil"
  "log"
  "math/big"
  "os/user"
  "path"
  "strings"
+ "syscall"
  "time"
 )
 
@@ -82,7 +83,8 @@ func main() {
 
  // Support for 'openssl enc -aes-128-cbc -md sha256 -pass pass:'
  if bytes.Compare(cfgContent[:8], []byte{0x53, 0x61, 0x6c, 0x74, 0x65, 0x64, 0x5f, 0x5f}) == 0 {
- passwd, e := gopass.GetPass("Encryption password: ")
+ fmt.Printf("Encryption password: ")
+ passwd, e := terminal.ReadPassword(syscall.Stdin)
  if e != nil {
  log.Fatal(e)
  }
@@ -102,7 +104,7 @@ func main() {
  mode := cipher.NewCBCDecrypter(block, iv)
  mode.CryptBlocks(rest, rest)
  // Remove padding
- i := len(rest)
+ i := len(rest) - 1
  for rest[i] < 16 {
  i--
  }