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>>>> "Kurt D. Zeilenga" <Kurt@OpenLDAP.org> 10/30/00
6:02:12 PM >>>
>At 05:12 PM 10/30/00 -0700, Jim Sermersheim wrote: >>There are some inconsistencies between the two ways the string is represented in 2.4 and 3. > >>2.4 talks about escaping a space character at the beginning or the end of the string. It doesn't say whether multiple spaces each need to be escaped. > >They MAY be escaped (like any other character). > > cn=\20 John Smith \20,dc=example,dc=com > >is fine. My read of 2.4 says that there are 10 things that need to be escaped by the
\ prefix mechanism (not \xx). These are:
A space or "#" at the begining
A space at the end
one of the other special char's.
When I read "If a character to be escaped is one of the list shown above,
then it is prefixed by a backslash ('\' ASCII 92)" I apply it to the full set of
characters (including pre space and #, and post space. Maybe it means only the
list of characters in the third bullet item, but that's not how I read it. This
tells me that these are legaI, and the proper way to escape pre/post spaces and
inital #:
cn=\ John Smith \ ,dc=example,dc=com
cn=\#John Smith,dc=example,dc=com >>3 includes "#" as a special char but not " ". > >" " should not be in special as it would allow: > cn=\ foo\ ,dc=example,dc=com > >which is bogus per 2.4.... Again, this is not how I interpret 2.4. the wording "the list shown above"
is open to interpretation.
>>The only time "#" needs to be escaped is when it appears at the beginning of the string. > >3's special should be consistent with 2.4's > o one of the characters ",", "+", """, "\", "<", ">" or ";" >that is, the '#' should not be listed. That, is: > > cn=foo#bar,dc=example,dc=com > >is fine per 2.4. I agree
>>Likewise, the space char should be accounted for. >>Adjust if only the first or last of multiple leading or following spaces needs to be escaped. > >No requirement to escape, hence no adjustment needed for space. > A beginning or ending space needs to be escaped. One of my original
questions is also, do multiple beginning or ending spaces need to be escaped?
i.e.:
cn=\ \ foo\ \ ,dc=example,dc=com
or, as the case may be, cn=\20\20foo\20\20,dc=example,dc=com
>How's this: > > distinguishedName = [name] > ; may be empty > > name = name-component *("," name-component) > > name-component = attributeTypeAndValue *("+" attributeTypeAndValue) > > attributeTypeAndValue > = attributeType "=" attributeValue > > attributeType = (ALPHA 1*keychar) / oid > > keychar = ALPHA / DIGIT / "-" > > oid = 1*DIGIT *("." 1*DIGIT) > > attributeValue = string | hexstring > > string = *( stringchar | pair ) > > special = "," / "=" / "+" / """ / "<" / ">" / ";" > > pair = ESC ( ESC / special / hexpair ) > stringchar = <any character except one of special or ESC> > > hexstring = "#" 1*hexpair > > hexpair = HEX HEX > > HEX = DIGIT > / "A" / "B" / "C" / "D" / "E" / "F" > / "a" / "b" / "c" / "d" / "e" / "f" > > ALPHA = <any ASCII alphabetic character> > ; decimal 65-90 and 97-122 > DIGIT = <any ASCII decimal digit> > ; decimal 48-57 > ESC = <the ASCII backslash character "\"> > ; decimal 92 > This BNF doesn't tell me how to properly represent these in LDAP v3: cn="#123 foo",dc=example,dc=com cn=" foo ",dc=example,dc=com It also now allows me to do this:
cn=#123 foo,dc=example,dc=com Jim
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