mirror of
https://github.com/rls-moe/nyx
synced 2024-11-14 22:12:24 +00:00
101 lines
3.1 KiB
Markdown
101 lines
3.1 KiB
Markdown
passlib for go
|
|
==============
|
|
|
|
[](https://godoc.org/gopkg.in/hlandau/passlib.v1) [](https://travis-ci.org/hlandau/passlib)
|
|
|
|
[Python's passlib](https://pythonhosted.org/passlib/) is quite an amazing
|
|
library. I'm not sure there's a password library in existence with more thought
|
|
put into it, or with more support for obscure password formats.
|
|
|
|
This is a skeleton of a port of passlib to Go. It dogmatically adopts the
|
|
modular crypt format, which [passlib has excellent documentation for](https://pythonhosted.org/passlib/modular_crypt_format.html#modular-crypt-format).
|
|
|
|
Currently, it supports:
|
|
|
|
- sha256-crypt
|
|
- sha512-crypt
|
|
- scrypt-sha256
|
|
- bcrypt
|
|
- passlib's bcrypt-sha256 variant
|
|
- pbkdf2-sha1 (in passlib format)
|
|
- pbkdf2-sha256 (in passlib format)
|
|
- pbkdf2-sha512 (in passlib format)
|
|
|
|
By default, it will hash using scrypt-sha256 and verify existing hashes using
|
|
any of these schemes.
|
|
|
|
Example Usage
|
|
-------------
|
|
There's a default context for ease of use. Most people need only concern
|
|
themselves with the functions `Hash` and `Verify`:
|
|
|
|
```go
|
|
// Hash a plaintext, UTF-8 password.
|
|
func Hash(password string) (hash string, err error)
|
|
|
|
// Verifies a plaintext, UTF-8 password using a previously derived hash.
|
|
// Returns non-nil err if verification fails.
|
|
//
|
|
// Also returns an upgraded password hash if the hash provided is
|
|
// deprecated.
|
|
func Verify(password, hash string) (newHash string, err error)
|
|
```
|
|
|
|
Here's a rough skeleton of typical usage.
|
|
|
|
```go
|
|
import "gopkg.in/hlandau/passlib.v1"
|
|
|
|
func RegisterUser() {
|
|
(...)
|
|
|
|
password := get a (UTF-8, plaintext) password from somewhere
|
|
|
|
hash, err := passlib.Hash(password)
|
|
if err != nil {
|
|
// couldn't hash password for some reason
|
|
return
|
|
}
|
|
|
|
(store hash in database, etc.)
|
|
}
|
|
|
|
func CheckPassword() bool {
|
|
password := get the password the user entered
|
|
hash := the hash you stored from the call to Hash()
|
|
|
|
newHash, err := passlib.Verify(password, hash)
|
|
if err != nil {
|
|
// incorrect password, malformed hash, etc.
|
|
// either way, reject
|
|
return false
|
|
}
|
|
|
|
// The context has decided, as per its policy, that
|
|
// the hash which was used to validate the password
|
|
// should be changed. It has upgraded the hash using
|
|
// the verified password.
|
|
if newHash != "" {
|
|
(store newHash in database, replacing old hash)
|
|
}
|
|
|
|
return true
|
|
}
|
|
```
|
|
|
|
scrypt Modular Crypt Format
|
|
---------------------------
|
|
Since scrypt does not have a pre-existing modular crypt format standard, I made one. It's as follows:
|
|
|
|
$s2$N$r$p$salt$hash
|
|
|
|
...where `N`, `r` and `p` are the respective difficulty parameters to scrypt as positive decimal integers without leading zeroes, and `salt` and `hash` are base64-encoded binary strings. Note that the RFC 4648 base64 encoding is used (not the one used by sha256-crypt and sha512-crypt).
|
|
|
|
Licence
|
|
-------
|
|
passlib is partially derived from Python's passlib and so maintains its BSD license.
|
|
|
|
© 2008-2012 Assurance Technologies LLC. (Python passlib) BSD License
|
|
© 2014 Hugo Landau <hlandau@devever.net> BSD License
|
|
|