mirror of https://github.com/minio/minio.git
86 lines
3.2 KiB
Go
86 lines
3.2 KiB
Go
/*
|
|
* MinIO Object Storage (c) 2021 MinIO, Inc.
|
|
*
|
|
* 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
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package target
|
|
|
|
import (
|
|
"crypto/sha512"
|
|
|
|
"github.com/Shopify/sarama"
|
|
"github.com/xdg/scram"
|
|
|
|
"github.com/minio/minio/internal/hash/sha256"
|
|
)
|
|
|
|
func initScramClient(args KafkaArgs, config *sarama.Config) {
|
|
switch args.SASL.Mechanism {
|
|
case "sha512":
|
|
config.Net.SASL.SCRAMClientGeneratorFunc = func() sarama.SCRAMClient { return &XDGSCRAMClient{HashGeneratorFcn: KafkaSHA512} }
|
|
config.Net.SASL.Mechanism = sarama.SASLMechanism(sarama.SASLTypeSCRAMSHA512)
|
|
case "sha256":
|
|
config.Net.SASL.SCRAMClientGeneratorFunc = func() sarama.SCRAMClient { return &XDGSCRAMClient{HashGeneratorFcn: KafkaSHA256} }
|
|
config.Net.SASL.Mechanism = sarama.SASLMechanism(sarama.SASLTypeSCRAMSHA256)
|
|
default:
|
|
// default to PLAIN
|
|
config.Net.SASL.Mechanism = sarama.SASLMechanism(sarama.SASLTypePlaintext)
|
|
}
|
|
}
|
|
|
|
// KafkaSHA256 is a function that returns a crypto/sha256 hasher and should be used
|
|
// to create Client objects configured for SHA-256 hashing.
|
|
var KafkaSHA256 scram.HashGeneratorFcn = sha256.New
|
|
|
|
// KafkaSHA512 is a function that returns a crypto/sha512 hasher and should be used
|
|
// to create Client objects configured for SHA-512 hashing.
|
|
var KafkaSHA512 scram.HashGeneratorFcn = sha512.New
|
|
|
|
// XDGSCRAMClient implements the client-side of an authentication
|
|
// conversation with a server. A new conversation must be created for
|
|
// each authentication attempt.
|
|
type XDGSCRAMClient struct {
|
|
*scram.Client
|
|
*scram.ClientConversation
|
|
scram.HashGeneratorFcn
|
|
}
|
|
|
|
// Begin constructs a SCRAM client component based on a given hash.Hash
|
|
// factory receiver. This constructor will normalize the username, password
|
|
// and authzID via the SASLprep algorithm, as recommended by RFC-5802. If
|
|
// SASLprep fails, the method returns an error.
|
|
func (x *XDGSCRAMClient) Begin(userName, password, authzID string) (err error) {
|
|
x.Client, err = x.HashGeneratorFcn.NewClient(userName, password, authzID)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
x.ClientConversation = x.Client.NewConversation()
|
|
return nil
|
|
}
|
|
|
|
// Step takes a string provided from a server (or just an empty string for the
|
|
// very first conversation step) and attempts to move the authentication
|
|
// conversation forward. It returns a string to be sent to the server or an
|
|
// error if the server message is invalid. Calling Step after a conversation
|
|
// completes is also an error.
|
|
func (x *XDGSCRAMClient) Step(challenge string) (response string, err error) {
|
|
response, err = x.ClientConversation.Step(challenge)
|
|
return
|
|
}
|
|
|
|
// Done returns true if the conversation is completed or has errored.
|
|
func (x *XDGSCRAMClient) Done() bool {
|
|
return x.ClientConversation.Done()
|
|
}
|