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15 July 2013

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LDAP Lightweight Directory Access Protocol           Standards LDAP


rfc4515

rfc4515

Représentation des chaînes dans le filtres de recherche

Définition d'un filtre de recherche


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 }
    
SubstringFilter ::= SEQUENCE {
    type AttributeDescription, initial and final can occur at most once
    substrings SEQUENCE SIZE (1..MAX) OF substring CHOICE {
        initial [0] AssertionValue,
        any [1] AssertionValue,
        final [2] AssertionValue } }
    
AttributeValueAssertion ::= SEQUENCE {
    attributeDesc AttributeDescription,
    assertionValue AssertionValue }
    
MatchingRuleAssertion ::= SEQUENCE {
    matchingRule [1] MatchingRuleId OPTIONAL,
    type [2] AttributeDescription OPTIONAL,
    matchValue [3] AssertionValue,
    dnAttributes [4] BOOLEAN DEFAULT FALSE }
    
AttributeDescription ::= LDAPString Constrained to ‹attributedescription› [RFC4512]
    
AttributeValue ::= OCTET STRING
    
MatchingRuleId ::= LDAPString
    
AssertionValue ::= OCTET STRING
    
LDAPString ::= OCTET STRING UTF-8 encoded, [Unicode] characters

AttributeDescription est une représentation chaîne d'une description d'attribut
AttributeValue et AssertionValue ont une forme définie dans la RFC4517

Définition des filtres de recherche

Un filtre LDAP est une chaîne UTF8 définis par la grammaire suivante (notation ABNF)
filter = LPAREN filtercomp RPAREN
filtercomp = and / or / not / item
and = AMPERSAND filterlist
or = VERTBAR filterlist
not = EXCLAMATION filter
filterlist = 1*filter
item = simple / present / substring / extensible
simple = attr filtertype assertionvalue
filtertype = equal / approx / greaterorequal / lessorequal
equal = EQUALS
approx = TILDE EQUALS
greaterorequal = RANGLE EQUALS
lessorequal = LANGLE EQUALS
extensible = ( attr [dnattrs]
    [matchingrule] COLON EQUALS assertionvalue )
    / ( [dnattrs]
    matchingrule COLON EQUALS assertionvalue )
present = attr EQUALS ASTERISK
substring = attr EQUALS [initial] any [final]
initial = assertionvalue
any = ASTERISK *(assertionvalue ASTERISK)
final = assertionvalue
attr = attributedescription
dnattrs = COLON "dn"
matchingrule = COLON oid
assertionvalue = valueencoding
valueencoding = 0*(normal / escaped)
normal = UTF1SUBSET / UTFMB
escaped = ESC HEX HEX
UTF1SUBSET = %x01-27 / %x2B-5B / %x5D-7F
    ; UTF1SUBSET excludes 0x00 (NUL), LPAREN,
    ; RPAREN, ASTERISK, and ESC.
EXCLAMATION = %x21 ; exclamation mark ("!")
AMPERSAND = %x26 ; ampersand (or AND symbol) ("&")
ASTERISK = %x2A ; asterisk ("*")
COLON = %x3A ; colon (":")
VERTBAR = %x7C ; vertical bar (or pipe) ("|")
TILDE = %x7E ; tilde ("~")

Exemples

cn=Babs Jensen)
(!(cn=Tim Howes))
(&(objectClass=Person)(|(sn=Jensen)(cn=Babs J*)))
(o=univ*of*mich*)
(seeAlso=)
utilisation du matching rule "caseExactMatch":
(cn:caseExactMatch:=Fred Flintstone)
utilisation d'un MatchingRuleAssertion sans matchingRule:
(cn:=Betty Rubble)
Utilisation de la notation :oid:
(sn:dn:2.4.6.8.10:=Barney Rubble)
equality match, excepté que le DN devrait faire partie de l'entrée:
(o:dn:=Ace Industry)
exemples de matching rules:
(:1.2.3:=Wilma Flintstone)
(:DN:2.4.6.8.10:=Dino)
utilisation du mécanisme d'échappement:
(o=Parens R Us \28for all your parenthetical needs\29)
(cn=*\2A*)
(filename=C:\5cMyFile)
(bin=\00\00\00\04)
(sn=Lu\c4\8di\c4\87)
(1.3.6.1.4.1.1466.0=\04\02\48\69)