github.com/pingcap/ticdc@v0.0.0-20220526033649-485a10ef2652/pkg/security/scram_client.go (about)

     1  // Copyright 2021 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package security
    15  
    16  import (
    17  	"crypto/sha256"
    18  	"crypto/sha512"
    19  	"hash"
    20  
    21  	"github.com/xdg/scram"
    22  )
    23  
    24  var (
    25  	// SHA256 func
    26  	SHA256 scram.HashGeneratorFcn = func() hash.Hash { return sha256.New() }
    27  	// SHA512 func
    28  	SHA512 scram.HashGeneratorFcn = func() hash.Hash { return sha512.New() }
    29  )
    30  
    31  // XDGSCRAMClient xdg scram client
    32  type XDGSCRAMClient struct {
    33  	*scram.Client
    34  	*scram.ClientConversation
    35  	scram.HashGeneratorFcn
    36  }
    37  
    38  // Begin xdg scram client Begin
    39  func (x *XDGSCRAMClient) Begin(userName, password, authzID string) (err error) {
    40  	x.Client, err = x.HashGeneratorFcn.NewClient(userName, password, authzID)
    41  	if err != nil {
    42  		return err
    43  	}
    44  	x.ClientConversation = x.Client.NewConversation()
    45  	return nil
    46  }
    47  
    48  // Step xdg scram client Step
    49  func (x *XDGSCRAMClient) Step(challenge string) (response string, err error) {
    50  	response, err = x.ClientConversation.Step(challenge)
    51  	return
    52  }
    53  
    54  // Done xdg scram client Done
    55  func (x *XDGSCRAMClient) Done() bool {
    56  	return x.ClientConversation.Done()
    57  }