1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
21. 21
22. 22
23. 23
24. 24
25. 25
26. 26
27. 27
28. 28
29. 29
30. 30
31. 31
32. 32
33. 33
34. 34
35. 35
36. 36
37. 37
38. 38
39. 39
40. 40
41. 41
42. 42
43. 43
44. 44
45. 45
46. 46
47. 47
48. 48
49. 49
50. 50
51. 51
52. 52
53. 53
54. 54
55. 55
56. 56
57. 57
58. 58
59. 59
60. 60
61. 61
62. 62
63. 63
64. 64
65. 65
66. 66
67. 67
68. 68
69. 69
70. 70
71. 71
72. 72
73. 73
74. 74
75. 75
76. 76
77. 77
78. 78
79. 79
80. 80
81. 81
82. 82
83. 83
84. 84
85. 85
86. 86
87. 87
88. 88
89. 89
90. 90
91. 91
92. 92
93. 93
94. 94
95. 95
96. 96
97. 97
98. 98
99. 99
100. 100
101. 101
102. 102
103. 103
104. 104
105. 105
106. 106
107. 107
108. 108
109. 109
110. 110
111. 111
112. 112
113. 113
114. 114
115. 115
116. 116
117. 117
118. 118
119. 119
120. 120
121. 121
122. 122
123. 123
124. 124
125. 125
126. 126

package ldap

import (
	"fmt"

	ber "github.com/go-asn1-ber/asn1-ber"
)

const (
	passwordModifyOID = "1.3.6.1.4.1.4203.1.11.1"
)

// PasswordModifyRequest implements the Password Modify Extended Operation as defined in https://www.ietf.org/rfc/rfc3062.txt
type PasswordModifyRequest struct {
	// UserIdentity is an optional string representation of the user associated with the request.
	// This string may or may not be an LDAPDN [RFC2253].
	// If no UserIdentity field is present, the request acts up upon the password of the user currently associated with the LDAP session
	UserIdentity string
	// OldPassword, if present, contains the user's current password
	OldPassword string
	// NewPassword, if present, contains the desired password for this user
	NewPassword string
}

// PasswordModifyResult holds the server response to a PasswordModifyRequest
type PasswordModifyResult struct {
	// GeneratedPassword holds a password generated by the server, if present
	GeneratedPassword string
	// Referral are the returned referral
	Referral string
}

func (req *PasswordModifyRequest) appendTo(envelope *ber.Packet) error {
	pkt := ber.Encode(ber.ClassApplication, ber.TypeConstructed, ApplicationExtendedRequest, nil, "Password Modify Extended Operation")
	pkt.AppendChild(ber.NewString(ber.ClassContext, ber.TypePrimitive, 0, passwordModifyOID, "Extended Request Name: Password Modify OID"))

	extendedRequestValue := ber.Encode(ber.ClassContext, ber.TypePrimitive, 1, nil, "Extended Request Value: Password Modify Request")
	passwordModifyRequestValue := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "Password Modify Request")
	if req.UserIdentity != "" {
		passwordModifyRequestValue.AppendChild(ber.NewString(ber.ClassContext, ber.TypePrimitive, 0, req.UserIdentity, "User Identity"))
	}
	if req.OldPassword != "" {
		passwordModifyRequestValue.AppendChild(ber.NewString(ber.ClassContext, ber.TypePrimitive, 1, req.OldPassword, "Old Password"))
	}
	if req.NewPassword != "" {
		passwordModifyRequestValue.AppendChild(ber.NewString(ber.ClassContext, ber.TypePrimitive, 2, req.NewPassword, "New Password"))
	}
	extendedRequestValue.AppendChild(passwordModifyRequestValue)

	pkt.AppendChild(extendedRequestValue)

	envelope.AppendChild(pkt)

	return nil
}

// NewPasswordModifyRequest creates a new PasswordModifyRequest
//
// According to the RFC 3602 (https://tools.ietf.org/html/rfc3062):
// userIdentity is a string representing the user associated with the request.
// This string may or may not be an LDAPDN (RFC 2253).
// If userIdentity is empty then the operation will act on the user associated
// with the session.
//
// oldPassword is the current user's password, it can be empty or it can be
// needed depending on the session user access rights (usually an administrator
// can change a user's password without knowing the current one) and the
// password policy (see pwdSafeModify password policy's attribute)
//
// newPassword is the desired user's password. If empty the server can return
// an error or generate a new password that will be available in the
// PasswordModifyResult.GeneratedPassword
//
func NewPasswordModifyRequest(userIdentity string, oldPassword string, newPassword string) *PasswordModifyRequest {
	return &PasswordModifyRequest{
		UserIdentity: userIdentity,
		OldPassword:  oldPassword,
		NewPassword:  newPassword,
	}
}

// PasswordModify performs the modification request
func (l *Conn) PasswordModify(passwordModifyRequest *PasswordModifyRequest) (*PasswordModifyResult, error) {
	msgCtx, err := l.doRequest(passwordModifyRequest)
	if err != nil {
		return nil, err
	}
	defer l.finishMessage(msgCtx)

	packet, err := l.readPacket(msgCtx)
	if err != nil {
		return nil, err
	}

	result := &PasswordModifyResult{}

	if packet.Children[1].Tag == ApplicationExtendedResponse {
		err := GetLDAPError(packet)
		if err != nil {
			if IsErrorWithCode(err, LDAPResultReferral) {
				for _, child := range packet.Children[1].Children {
					if child.Tag == 3 {
						result.Referral = child.Children[0].Value.(string)
					}
				}
			}
			return result, err
		}
	} else {
		return nil, NewError(ErrorUnexpectedResponse, fmt.Errorf("unexpected Response: %d", packet.Children[1].Tag))
	}

	extendedResponse := packet.Children[1]
	for _, child := range extendedResponse.Children {
		if child.Tag == 11 {
			passwordModifyResponseValue := ber.DecodePacket(child.Data.Bytes())
			if len(passwordModifyResponseValue.Children) == 1 {
				if passwordModifyResponseValue.Children[0].Tag == 0 {
					result.GeneratedPassword = ber.DecodeString(passwordModifyResponseValue.Children[0].Data.Bytes())
				}
			}
		}
	}

	return result, nil
}