/usr/lib/python2.7/dist-packages/impacket/ldap/ldapasn1.py is in python-impacket 0.9.15-1.
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#
# This software is provided under under a slightly modified version
# of the Apache Software License. See the accompanying LICENSE file
# for more information.
#
# Author: Alberto Solino (@agsolino)
#
# Description:
# RFC 4511 Minimalistic implementation. We don't need much functionality yet
# If we need more complex use cases we might opt to use a third party implementation
# Keep in mind the APIs are still unstable, might require to re-write your scripts
# as we change them.
# Adding [MS-ADTS] specific functionality
#
# ToDo:
# [ ]
#
from pyasn1.type.univ import Sequence, Integer, Choice, SequenceOf, OctetString, Boolean, Enumerated, SetOf
from pyasn1.type.constraint import ValueRangeConstraint, ValueSizeConstraint
from pyasn1.type.namedtype import NamedType, OptionalNamedType, NamedTypes
from pyasn1.type.tag import Tag, tagClassContext, tagFormatConstructed, tagClassApplication, tagFormatSimple
from pyasn1.type.namedval import NamedValues
################################################################################
# CONSTANTS
################################################################################
MAXINT = 2147483647
# Search Scope constants
SCOPE_BASE = 0
SCOPE_ONE = 1
SCOPE_SUB = 2
# Search deref
DEREF_NEVER = 0
DEREF_SEARC = 1
DEREF_FIND = 2
DEREF_ALWAYS = 3
################################################################################
# CLASSES
################################################################################
class Integer7Bit(Integer):
# INTEGER (1 .. 127)
subtypeSpec = ValueRangeConstraint(1, 127)
class IntegerPositive(Integer):
subtypeSpec = Integer.subtypeSpec + ValueRangeConstraint(0, MAXINT)
class LDAPString(OctetString):
"""
LDAPString ::= OCTET STRING -- UTF-8 encoded,
-- [ISO10646] characters
"""
encoding = 'utf-8'
pass
class LDAPDN(LDAPString):
"""
LDAPDN ::= LDAPString -- Constrained to <distinguishedName>
-- [RFC4514]
"""
pass
class AuthSimple(OctetString):
tagSet = OctetString.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatSimple, 0))
encoding = 'utf-8'
class Credentials(OctetString):
encoding = 'utf-8'
class SaslCredentials(Sequence):
"""
SaslCredentials ::= SEQUENCE {
mechanism LDAPString,
credentials OCTET STRING OPTIONAL }
"""
tagSet = Sequence.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatConstructed, 3))
componentType = NamedTypes(
NamedType('mechanism', LDAPString()),
OptionalNamedType('credentials', Credentials())
)
class SicilyPackageDiscovery(OctetString):
tagSet = OctetString.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatSimple, 9))
encoding = 'utf-8'
class SicilyNegotiate(OctetString):
tagSet = OctetString.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatSimple, 10))
encoding = 'utf-8'
class SicilyResponse(OctetString):
tagSet = OctetString.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatSimple, 11))
encoding = 'utf-8'
class AuthenticationChoice(Choice):
"""
AuthenticationChoice ::= CHOICE {
simple [0] OCTET STRING,
sasl [3] SaslCredentials
sicilyPackageDiscovery [9] OCTET STRING
sicilyNegotiate [10] OCTET STRING
sicilyResponse [11] OCTET STRING }
"""
componentType = NamedTypes(
NamedType('simple', AuthSimple()),
NamedType('sasl', SaslCredentials()),
NamedType('sicilyPackageDiscovery', SicilyPackageDiscovery()),
NamedType('sicilyNegotiate', SicilyNegotiate()),
NamedType('sicilyResponse', SicilyResponse()),
)
class BindRequest(Sequence):
"""
BindRequest ::= [APPLICATION 0] SEQUENCE {
version INTEGER (1 .. 127),
name LDAPDN,
authentication AuthenticationChoice }
"""
tagSet = Sequence.tagSet.tagImplicitly(Tag(tagClassApplication, tagFormatConstructed, 0))
componentType = NamedTypes(
NamedType('version', Integer7Bit()),
NamedType('name', LDAPDN()),
NamedType('authentication', AuthenticationChoice()),
)
class URI(LDAPString):
pass
class Referral(SequenceOf):
"""
Referral ::= SEQUENCE SIZE (1..MAX) OF uri URI
"""
tagSet = SequenceOf.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatConstructed, 3))
componentType = URI()
class ResultCode(Enumerated):
"""
resultCode ENUMERATED {
success (0),
operationsError (1),
protocolError (2),
timeLimitExceeded (3),
sizeLimitExceeded (4),
compareFalse (5),
compareTrue (6),
authMethodNotSupported (7),
strongerAuthRequired (8),
-- 9 reserved --
referral (10),
adminLimitExceeded (11),
unavailableCriticalExtension (12),
confidentialityRequired (13),
saslBindInProgress (14),
noSuchAttribute (16),
undefinedAttributeType (17),
inappropriateMatching (18),
constraintViolation (19),
attributeOrValueExists (20),
invalidAttributeSyntax (21),
-- 22-31 unused --
noSuchObject (32),
aliasProblem (33),
invalidDNSyntax (34),
-- 35 reserved for undefined isLeaf --
aliasDereferencingProblem (36),
-- 37-47 unused --
inappropriateAuthentication (48),
invalidCredentials (49),
insufficientAccessRights (50),
busy (51),
unavailable (52),
unwillingToPerform (53),
loopDetect (54),
-- 55-63 unused --
namingViolation (64),
objectClassViolation (65),
notAllowedOnNonLeaf (66),
notAllowedOnRDN (67),
entryAlreadyExists (68),
objectClassModsProhibited (69),
-- 70 reserved for CLDAP --
affectsMultipleDSAs (71),
-- 72-79 unused --
other (80),
... },
"""
namedValues = NamedValues(
('success', 0),
('operationsError', 1),
('protocolError', 2),
('timeLimitExceeded', 3),
('sizeLimitExceeded', 4),
('compareFalse', 5),
('compareTrue', 6),
('authMethodNotSupported', 7),
('strongerAuthRequired', 8),
('referral', 10),
('adminLimitExceeded', 11),
('unavailableCriticalExtension', 12),
('confidentialityRequired', 13),
('saslBindInProgress', 14),
('noSuchAttribute', 16),
('undefinedAttributeType', 17),
('inappropriateMatching', 18),
('constraintViolatio', 19),
('attributeOrValueExists', 20),
('invalidAttributeSyntax', 21),
('noSuchObject', 32),
('aliasProblem', 33),
('invalidDNSyntaxn', 34),
('aliasDereferencingProblem', 36),
('inappropriateAuthentication', 48),
('invalidCredentials', 49),
('insufficientAccessRights', 50),
('busy', 51),
('unavailable', 52),
('unwillingToPerform', 53),
('loopDetect', 54),
('namingViolation', 64),
('objectClassViolation', 65),
('notAllowedOnNonLeaf', 66),
('notAllowedOnRDN', 67),
('entryAlreadyExists', 68),
('objectClassModsProhibited', 69),
('affectsMultipleDSAs', 71),
('other', 80),
)
class ServerSaslCreds(OctetString):
# serverSaslCreds [7] OCTET STRING OPTIONAL
tagSet = OctetString.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatSimple, 7))
class BindResponse(Sequence):
"""
BindResponse ::= [APPLICATION 1] SEQUENCE {
COMPONENTS OF LDAPResult,
serverSaslCreds [7] OCTET STRING OPTIONAL }
"""
tagSet = Sequence.tagSet.tagImplicitly(Tag(tagClassApplication, tagFormatConstructed, 1))
componentType = NamedTypes(
NamedType('resultCode', ResultCode()),
NamedType('matchedDN', LDAPDN()),
NamedType('diagnosticMessage', LDAPString()),
OptionalNamedType('referral', Referral()),
OptionalNamedType('serverSaslCreds', ServerSaslCreds()),
)
class Scope(Enumerated):
"""
scope ENUMERATED {
baseObject (0),
singleLevel (1),
wholeSubtree (2),
... },
"""
namedValues = NamedValues(
('baseObject', 0),
('singleLevel', 1),
('wholeSubtree', 2),
)
class DeRefAliases(Enumerated):
"""
derefAliases ENUMERATED {
neverDerefAliases (0),
derefInSearching (1),
derefFindingBaseObj (2),
derefAlways (3) }
"""
namedValues = NamedValues(
('neverDerefAliases', 0),
('derefInSearching', 1),
('derefFindingBaseObj', 2),
('derefAlways', 3),
)
class And(SetOf):
# and [0] SET SIZE (1..MAX) OF filter Filter
tagSet = SetOf.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatConstructed, 0))
subtypeSpec = SetOf.subtypeSpec + ValueSizeConstraint(1, MAXINT)
class Or(SetOf):
# or [1] SET SIZE (1..MAX) OF filter Filter
tagSet = SetOf.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatConstructed, 1))
subtypeSpec = SetOf.subtypeSpec + ValueSizeConstraint(1, MAXINT)
class Not(Choice):
# not [2] Filter
pass
class AttributeDescription(LDAPString):
"""
AttributeDescription::= LDAPString
-- Constrained
to < attributedescription >
-- [RFC4512]
"""
pass
class AttributeValue(OctetString):
# AttributeValue::= OCTET STRING
pass
class AttributeValueAssertion(Sequence):
"""
AttributeValueAssertion::= SEQUENCE
{
attributeDesc AttributeDescription,
assertionValue AssertionValue}
"""
componentType = NamedTypes(
NamedType('attributeDesc', AttributeDescription()),
NamedType('assertionValue', AttributeValue()),
)
class EqualityMatch(AttributeValueAssertion):
# equalityMatch [3] AttributeValueAssertion
tagSet = AttributeValueAssertion.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatConstructed, 3))
class GreaterOrEqual(AttributeValueAssertion):
# greaterOrEqual [5] AttributeValueAssertion
tagSet = AttributeValueAssertion.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatConstructed, 5))
class LessOrEqual(AttributeValueAssertion):
# lessOrEqual [6] AttributeValueAssertion
tagSet = AttributeValueAssertion.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatConstructed, 6))
class Present(AttributeDescription):
# Present [7] AttributeValueAssertion
tagSet = AttributeDescription.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatConstructed, 7))
class ApproxMatch(AttributeValueAssertion):
# approxMatch [8] AttributeValueAssertion
tagSet = AttributeValueAssertion.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatConstructed, 7))
class AssertionValue(OctetString):
# AssertionValue ::= OCTET STRING
encoding = 'utf-8'
class InitialAssertion(AssertionValue):
# initial [0] AssertionValue, -- can occur at most once
tagSet = AssertionValue.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatSimple, 0))
class AnyAssertion(AssertionValue):
# any [1] AssertionValue
tagSet = AssertionValue.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatSimple, 1))
class FinalAssertion(AssertionValue):
# final [2] AssertionValue } -- can occur at most once
tagSet = AssertionValue.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatSimple, 2))
class SubString(Choice):
"""
substring CHOICE {
initial [0] AssertionValue, -- can occur at most once
any [1] AssertionValue,
final [2] AssertionValue } -- can occur at most once
}
"""
componentType = NamedTypes(
NamedType('initial', InitialAssertion()),
NamedType('any', AnyAssertion()),
NamedType('final', FinalAssertion()),
)
class SubStrings(SequenceOf):
"""
substrings SEQUENCE SIZE (1..MAX) OF substring CHOICE {
initial [0] AssertionValue, -- can occur at most once
any [1] AssertionValue,
final [2] AssertionValue } -- can occur at most once
}
"""
componentType = SubString()
subtypeSpec = SequenceOf.subtypeSpec + ValueSizeConstraint(1, MAXINT)
class SubstringFilter(Sequence):
"""
SubstringFilter ::= SEQUENCE {
type AttributeDescription,
substrings SEQUENCE SIZE (1..MAX) OF substring CHOICE {
initial [0] AssertionValue, -- can occur at most once
any [1] AssertionValue,
final [2] AssertionValue } -- can occur at most once
}
"""
tagSet = Sequence.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatConstructed, 4))
componentType = NamedTypes(
NamedType('type', AttributeDescription()),
NamedType('substrings', SubStrings()),
)
class TypeDescription(AttributeDescription):
# type [2] AttributeDescription OPTIONAL
tagSet = AttributeDescription.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatSimple, 2))
class matchValueAssertion(AssertionValue):
# matchValue [3] AssertionValue
tagSet = AssertionValue.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatSimple, 3))
class MatchingRuleId(LDAPString):
# matchingRule [1] MatchingRuleId OPTIONAL
tagSet = LDAPString.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatSimple, 1))
pass
class DnAttributes(Boolean):
# dnAttributes [4] BOOLEAN DEFAULT FALSE }
tagSet = Boolean.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatSimple, 4))
defaultValue = Boolean(False)
class MatchingRuleAssertion(Sequence):
"""
MatchingRuleAssertion ::= SEQUENCE {
matchingRule [1] MatchingRuleId OPTIONAL,
type [2] AttributeDescription OPTIONAL,
matchValue [3] AssertionValue,
dnAttributes [4] BOOLEAN DEFAULT FALSE }
"""
tagSet = Sequence.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatConstructed, 9))
componentType = NamedTypes(
OptionalNamedType('matchingRule', MatchingRuleId()),
OptionalNamedType('type', TypeDescription()),
NamedType('matchValue', matchValueAssertion()),
NamedType('dnAttributes', DnAttributes()),
)
class Filter(Choice):
"""
Filter ::= CHOICE {
and [0] SET SIZE (1..MAX) OF filter Filter,
or [1] SET SIZE (1..MAX) OF filter Filter,
not [2] Filter,
equalityMatch [3] AttributeValueAssertion,
substrings [4] SubstringFilter,
greaterOrEqual [5] AttributeValueAssertion,
lessOrEqual [6] AttributeValueAssertion,
present [7] AttributeDescription,
approxMatch [8] AttributeValueAssertion,
extensibleMatch [9] MatchingRuleAssertion,
... }
"""
componentType = NamedTypes(
NamedType('and', And()),
NamedType('or', Or()),
NamedType('not', Not()),
NamedType('equalityMatch', EqualityMatch()),
NamedType('substrings', SubstringFilter()),
NamedType('greaterOrEqual', GreaterOrEqual()),
NamedType('lessOrEqual', LessOrEqual()),
NamedType('present', Present()),
NamedType('approxMatch', ApproxMatch()),
NamedType('extensibleMatch', MatchingRuleAssertion()),
)
# Similar trick to what we did with DRSUAPI (pNextEntInf). Trying to cheat Python, using Filter() now with And(),
# Or() and Not() now that is defined
And.componentType = Filter()
Or.componentType = Filter()
Not.componentType = NamedTypes(NamedType('notFilter', Filter()))
Not.tagSet = Filter.tagSet.tagExplicitly(Tag(tagClassContext, tagFormatConstructed, 2))
class Selector(LDAPString):
pass
class AttributeSelection(SequenceOf):
"""
AttributeSelection ::= SEQUENCE OF selector LDAPString
-- The LDAPString is constrained to
-- <attributeSelector> in Section 4.5.1.8
"""
componentType = Selector()
class SearchRequest(Sequence):
"""
SearchRequest ::= [APPLICATION 3] SEQUENCE {
baseObject LDAPDN,
scope ENUMERATED {
baseObject (0),
singleLevel (1),
wholeSubtree (2),
... },
derefAliases ENUMERATED {
neverDerefAliases (0),
derefInSearching (1),
derefFindingBaseObj (2),
derefAlways (3) },
sizeLimit INTEGER (0 .. maxInt),
timeLimit INTEGER (0 .. maxInt),
typesOnly BOOLEAN,
filter Filter,
attributes AttributeSelection }
"""
tagSet = Sequence.tagSet.tagImplicitly(Tag(tagClassApplication, tagFormatConstructed, 3))
componentType = NamedTypes(
NamedType('baseObject', LDAPDN()),
NamedType('scope', Scope()),
NamedType('derefAliases', DeRefAliases()),
NamedType('sizeLimit', IntegerPositive()),
NamedType('timeLimit', IntegerPositive()),
NamedType('typesOnly', Boolean()),
NamedType('filter', Filter()),
NamedType('attributes', AttributeSelection()),
)
class AttributeValue(OctetString):
# AttributeValue ::= OCTET STRING
encoding = 'utf-8'
class Vals(SetOf):
componentType = AttributeValue()
class PartialAttribute(Sequence):
"""
PartialAttribute ::= SEQUENCE {
type AttributeDescription,
vals SET OF value AttributeValue }
"""
componentType = NamedTypes(
NamedType('type', AttributeDescription()),
NamedType('vals', Vals()),
)
class PartialAttributeList(SequenceOf):
"""
PartialAttributeList ::= SEQUENCE OF
partialAttribute PartialAttribute
"""
componentType = PartialAttribute()
class Attributes(PartialAttributeList):
pass
class SearchResultEntry(Sequence):
"""
SearchResultEntry ::= [APPLICATION 4] SEQUENCE {
objectName LDAPDN,
attributes PartialAttributeList }
"""
tagSet = Sequence.tagSet.tagImplicitly(Tag(tagClassApplication, tagFormatConstructed, 4))
componentType = NamedTypes(
NamedType('objectName', LDAPDN()),
NamedType('attributes', Attributes()),
)
class LDAPResult(Sequence):
"""
LDAPResult ::= SEQUENCE {
resultCode ENUMERATED {
success (0),
operationsError (1),
protocolError (2),
timeLimitExceeded (3),
sizeLimitExceeded (4),
compareFalse (5),
compareTrue (6),
authMethodNotSupported (7),
strongerAuthRequired (8),
-- 9 reserved --
referral (10),
adminLimitExceeded (11),
unavailableCriticalExtension (12),
confidentialityRequired (13),
saslBindInProgress (14),
noSuchAttribute (16),
undefinedAttributeType (17),
inappropriateMatching (18),
constraintViolation (19),
attributeOrValueExists (20),
invalidAttributeSyntax (21),
-- 22-31 unused --
noSuchObject (32),
aliasProblem (33),
invalidDNSyntax (34),
-- 35 reserved for undefined isLeaf --
aliasDereferencingProblem (36),
-- 37-47 unused --
inappropriateAuthentication (48),
invalidCredentials (49),
insufficientAccessRights (50),
busy (51),
unavailable (52),
unwillingToPerform (53),
loopDetect (54),
-- 55-63 unused --
namingViolation (64),
objectClassViolation (65),
notAllowedOnNonLeaf (66),
notAllowedOnRDN (67),
entryAlreadyExists (68),
objectClassModsProhibited (69),
-- 70 reserved for CLDAP --
affectsMultipleDSAs (71),
-- 72-79 unused --
other (80),
... },
matchedDN LDAPDN,
diagnosticMessage LDAPString,
referral [3] Referral OPTIONAL }
"""
componentType = NamedTypes(
NamedType('resultCode', ResultCode()),
NamedType('matchedDN', LDAPDN()),
NamedType('diagnosticMessage', LDAPString()),
OptionalNamedType('referral', Referral()),
)
class SearchResultDone(LDAPResult):
# SearchResultDone ::= [APPLICATION 5] LDAPResult
tagSet = LDAPResult.tagSet.tagImplicitly(Tag(tagClassApplication, tagFormatConstructed, 5))
class SearchResultReference(SequenceOf):
"""
SearchResultReference ::= [APPLICATION 19] SEQUENCE
SIZE (1..MAX) OF uri URI
"""
tagSet = SequenceOf.tagSet.tagImplicitly(Tag(tagClassApplication, tagFormatConstructed, 19))
componentType = URI()
subtypeSpec = SequenceOf.subtypeSpec + ValueSizeConstraint(1, MAXINT)
class ProtocolOp(Choice):
"""
protocolOp CHOICE {
bindRequest BindRequest,
bindResponse BindResponse,
unbindRequest UnbindRequest,
searchRequest SearchRequest,
searchResEntry SearchResultEntry,
searchResDone SearchResultDone,
searchResRef SearchResultReference,
modifyRequest ModifyRequest,
modifyResponse ModifyResponse,
addRequest AddRequest,
addResponse AddResponse,
delRequest DelRequest,
delResponse DelResponse,
modDNRequest ModifyDNRequest,
modDNResponse ModifyDNResponse,
compareRequest CompareRequest,
compareResponse CompareResponse,
abandonRequest AbandonRequest,
extendedReq ExtendedRequest,
extendedResp ExtendedResponse,
...,
intermediateResponse IntermediateResponse },
"""
# For now we just implement a few choices
componentType = NamedTypes(
NamedType('bindRequest', BindRequest()),
NamedType('bindResponse', BindResponse()),
NamedType('searchRequest', SearchRequest()),
NamedType('searchResEntry', SearchResultEntry()),
NamedType('searchResDone', SearchResultDone()),
NamedType('searchResRef', SearchResultReference()),
)
class LDAPOID(OctetString):
"""
LDAPOID ::= OCTET STRING -- Constrained to <numericoid>
-- [RFC4512]
"""
pass
class Control(Sequence):
"""
Control ::= SEQUENCE {
controlType LDAPOID,
criticality BOOLEAN DEFAULT FALSE,
controlValue OCTET STRING OPTIONAL }
"""
componentType = NamedTypes(
NamedType('controlType', LDAPOID()),
NamedType('criticality', Boolean(False)),
OptionalNamedType('controlValue', OctetString()),
)
class Controls(SequenceOf):
# Controls ::= SEQUENCE OF control Control
tagSet = SequenceOf.tagSet.tagImplicitly(Tag(tagClassContext, tagFormatConstructed, 0))
componentType = Control()
class MessageID(IntegerPositive):
# MessageID ::= INTEGER (0 .. maxInt)
pass
class LDAPMessage(Sequence):
"""
LDAPMessage ::= SEQUENCE {
messageID MessageID,
protocolOp CHOICE {
bindRequest BindRequest,
bindResponse BindResponse,
unbindRequest UnbindRequest,
searchRequest SearchRequest,
searchResEntry SearchResultEntry,
searchResDone SearchResultDone,
searchResRef SearchResultReference,
modifyRequest ModifyRequest,
modifyResponse ModifyResponse,
addRequest AddRequest,
addResponse AddResponse,
delRequest DelRequest,
delResponse DelResponse,
modDNRequest ModifyDNRequest,
modDNResponse ModifyDNResponse,
compareRequest CompareRequest,
compareResponse CompareResponse,
abandonRequest AbandonRequest,
extendedReq ExtendedRequest,
extendedResp ExtendedResponse,
...,
intermediateResponse IntermediateResponse },
controls [0] Controls OPTIONAL }
MessageID ::= INTEGER (0 .. maxInt)
maxInt INTEGER ::= 2147483647 -- (2^^31 - 1) --
"""
componentType = NamedTypes(
NamedType('messageID', MessageID()),
NamedType('protocolOp', ProtocolOp()),
OptionalNamedType('controls', Controls())
)
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