forked from mongodb/mongo-go-driver
/
mongodbcr.go
94 lines (78 loc) · 2.64 KB
/
mongodbcr.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
// Copyright (C) MongoDB, Inc. 2017-present.
//
// 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 auth
import (
"context"
"crypto/md5"
"fmt"
"io"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/x/bsonx/bsoncore"
"go.mongodb.org/mongo-driver/x/mongo/driver"
"go.mongodb.org/mongo-driver/x/mongo/driver/description"
"go.mongodb.org/mongo-driver/x/mongo/driver/operation"
)
// MONGODBCR is the mechanism name for MONGODB-CR.
//
// The MONGODB-CR authentication mechanism is deprecated in MongoDB 4.0.
const MONGODBCR = "MONGODB-CR"
func newMongoDBCRAuthenticator(cred *Cred) (Authenticator, error) {
return &MongoDBCRAuthenticator{
DB: cred.Source,
Username: cred.Username,
Password: cred.Password,
}, nil
}
// MongoDBCRAuthenticator uses the MONGODB-CR algorithm to authenticate a connection.
//
// The MONGODB-CR authentication mechanism is deprecated in MongoDB 4.0.
type MongoDBCRAuthenticator struct {
DB string
Username string
Password string
}
// Auth authenticates the connection.
//
// The MONGODB-CR authentication mechanism is deprecated in MongoDB 4.0.
func (a *MongoDBCRAuthenticator) Auth(ctx context.Context, _ description.Server, conn driver.Connection) error {
db := a.DB
if db == "" {
db = defaultAuthDB
}
doc := bsoncore.BuildDocumentFromElements(nil, bsoncore.AppendInt32Element(nil, "getnonce", 1))
cmd := operation.NewCommand(doc).Database(db).Deployment(driver.SingleConnectionDeployment{conn})
err := cmd.Execute(ctx)
if err != nil {
return newError(err, MONGODBCR)
}
rdr := cmd.Result()
var getNonceResult struct {
Nonce string `bson:"nonce"`
}
err = bson.Unmarshal(rdr, &getNonceResult)
if err != nil {
return newAuthError("unmarshal error", err)
}
doc = bsoncore.BuildDocumentFromElements(nil,
bsoncore.AppendInt32Element(nil, "authenticate", 1),
bsoncore.AppendStringElement(nil, "user", a.Username),
bsoncore.AppendStringElement(nil, "nonce", getNonceResult.Nonce),
bsoncore.AppendStringElement(nil, "key", a.createKey(getNonceResult.Nonce)),
)
cmd = operation.NewCommand(doc).Database(db).Deployment(driver.SingleConnectionDeployment{conn})
err = cmd.Execute(ctx)
if err != nil {
return newError(err, MONGODBCR)
}
return nil
}
func (a *MongoDBCRAuthenticator) createKey(nonce string) string {
h := md5.New()
_, _ = io.WriteString(h, nonce)
_, _ = io.WriteString(h, a.Username)
_, _ = io.WriteString(h, mongoPasswordDigest(a.Username, a.Password))
return fmt.Sprintf("%x", h.Sum(nil))
}