Re: DER coding of a default syntax value
Bancroft Scott <75613.602@compuserve.com> Sat, 22 June 1996 04:55 UTC
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Date: Sat, 22 Jun 1996 00:12:12 -0400
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From: Bancroft Scott <75613.602@compuserve.com>
To: Peter Williams <peter@verisign.com>
Cc: PEM-DEV <PEM-DEV@tis.com>
Subject: Re: DER coding of a default syntax value
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Peter Williams <peter@verisign.com> wrote: >let me, with my better yet better ASN.1 education now, again reexpress what >I believe we are saying isnt allowed to be expressed (as the notation >grammar prevents it): > > > foo2 EXTENSION ::= { > SYNTAX PetersBooleanType -- a typereference > IDENTIFIED BY id-foo2 > } > >PetersBooleanType ::= BOOLEAN DEFAULT False > >this is because PeterBooleanType isnt legal notation. a typereference to >"Type" (BOOLEAN) cannot just >arbtraily assign itself with a default value, only component >types can do this. The ASN.1 syntax grammer (happily) prevents >this illegal expression. Correct, the definition of PetersBooleanType is invalid. >Ok next nasty. > > foo3 EXTENSION ::= { > SYNTAX PeterSeqOfType -- a typereference > IDENTIFIED BY id-foo3 > } > >PeterSeqOfType ::= SEQUENCE OF BOOLEAN DEFAULT {} This too is invalid, since DEFAULT can appear only in the definition of a component of a SET or SEQUENCE. Bancroft Scott Open Systems Solutions, Inc.
- DER coding of a default syntax value Peter Williams
- Re: DER coding of a default syntax value Bancroft Scott
- Re: DER coding of a default syntax value Peter Williams
- Re: DER coding of a default syntax value Bancroft Scott
- Re: DER coding of a default syntax value Peter Williams
- Re: DER coding of a default syntax value Bancroft Scott