mirror of
https://github.com/ergochat/ergo.git
synced 2024-11-29 23:49:25 +01:00
43 lines
1.8 KiB
Go
43 lines
1.8 KiB
Go
// Copyright 2018 by David A. Golden. All rights reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
// not use this file except in compliance with the License. You may obtain
|
|
// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
package scram
|
|
|
|
import (
|
|
"crypto/sha1"
|
|
"crypto/sha256"
|
|
"hash"
|
|
)
|
|
|
|
// HashGeneratorFcn abstracts a factory function that returns a hash.Hash
|
|
// value to be used for SCRAM operations. Generally, one would use the
|
|
// provided package variables, `scram.SHA1` and `scram.SHA256`, for the most
|
|
// common forms of SCRAM.
|
|
type HashGeneratorFcn func() hash.Hash
|
|
|
|
// SHA1 is a function that returns a crypto/sha1 hasher and should be used to
|
|
// create Client objects configured for SHA-1 hashing.
|
|
var SHA1 HashGeneratorFcn = func() hash.Hash { return sha1.New() }
|
|
|
|
// SHA256 is a function that returns a crypto/sha256 hasher and should be used
|
|
// to create Client objects configured for SHA-256 hashing.
|
|
var SHA256 HashGeneratorFcn = func() hash.Hash { return sha256.New() }
|
|
|
|
// NewClientUnprepped acts like NewClient, except none of the arguments will
|
|
// be normalized via SASLprep. This is not generally recommended, but is
|
|
// provided for users that may have custom normalization needs.
|
|
func (f HashGeneratorFcn) NewClientUnprepped(username, password, authzID string) (*Client, error) {
|
|
return newClient(username, password, authzID, f), nil
|
|
}
|
|
|
|
// NewServer constructs a SCRAM server component based on a given hash.Hash
|
|
// factory receiver. To be maximally generic, it uses dependency injection to
|
|
// handle credential lookup, which is the process of turning a username string
|
|
// into a struct with stored credentials for authentication.
|
|
func (f HashGeneratorFcn) NewServer(cl CredentialLookup) (*Server, error) {
|
|
return newServer(cl, f)
|
|
}
|