Hi,
9f (10011111) : 10 means context specific tag class.
0 means primitive type tag.
11111 means value is greater than 31.
81 (10000001) : fist bit 1 means that there are more tag bytes.
7 bits are tag value.
18 (00011000) : first bit 0 means end of tag.
7 bits are tag value.
so, tag value of '9f8118' -> 1(of 2nd bytes) 0011000(of 3rd bytes)
0x98(152)
Regards,
/Hong-Gi Ko
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> Sent: Saturday, September 15, 2001 2:31 PM
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]
> Subject: RE: [ASN.1] RE:
>
>
> Hi
>
> If the tag is 3 byte like 9F8118 , then how to calculate the value in
> the
> tag
>
> Regards
> Prajnananda
> -----Original Message-----
> From: Hong-Gi Ko (???) [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, September 06, 2001 03:05 PM
> To: [EMAIL PROTECTED]
> Subject: RE: [ASN.1] RE:
>
>
> Tripathy,
>
> Same rule..
>
> 9F8118 : 1001 1111 1000 0001 0001 1000
>
> First 2 bit : tag class (UNIVERSAL / APPLICATION / CONTEXT-SPECIFIC /
> PRIVATE)
> next 1 bit : primitive/constructed
>
> if 1 byte tag(tag value is less than 31, i.e., max 30) : next 5 bit is
> value.
> (For instance, the tag for MIN, 0x88(1000 1000) tag value is 8)
>
> if 2 bye tag(tag value range 31 ~ 127) : next 5 bits filled with all
1.
> next 7bits of 1 byte(except first 1 bit) is value.
> (For instance, the tag for SMS_NotificationIndicator, 0x9F6D
> SMS_NotificationIndicator ::= [109] OCTET STRING,
>
>
> See X.218, X.209 and X.600 series for more detail.
>
> Visit following sites.
> http://www-sop.inria.fr/rodeo/personnel/hoschka/asn1.html
> http://asn1.elibel.tm.fr/en/index.htm
>
>
> Good luck with it,
> /Hong-Gi Ko
>
>
>
>
>
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, September 06, 2001 5:55 PM
> > To: [EMAIL PROTECTED]
> > Subject: RE: [ASN.1] RE:
> >
> >
> > Hi Hong-Gi Ko
> >
> > Thanks a lot for helping me . If I write the asn1
> > specifications the
> > way u have suggested I may get the two octet tag like 9F69 . But
> > if i want a
> > tag like 9F8118 what i have to do . Please guide me .
> >
> > Thanks & Regards
> > Tripathy
> >
> >
> >
> >
> >
> > -----Original Message-----
> > From: Hong-Gi Ko (???) [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, September 06, 2001 12:38 PM
> > To: [EMAIL PROTECTED]
> > Subject: [ASN.1] RE:
> >
> >
> > Tripathy,
> > describe like this
> > :
> > aaa [105] IMPLICIT OCTET STRING,
> > bbb [109] IMPLICIT OCTET STRING,
> > :
> > then, you can get what you want.
> >
> > Regards,
> > /Hong-Gi Ko
> >
> >
> >
> > > -----Original Message-----
> > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> > > Sent: Thursday, September 06, 2001 2:45 PM
> > > To: [EMAIL PROTECTED]
> > > Subject:
> > >
> > >
> > > Hi All
> > > Good Evening. I am from india and I want some help regarding
> > the tag. My
> > > problem is like this. I want to encode some message of the ANSI .
> While
> > > encoding the same I get the tag like 89,90,91,etc. Since i
> > want to define
> > > my own tag like 9F69 , 9F6d in that place . Can help me by sending
> some
> > > examples or tips so that i can use the user defined tags while
> > writing the
> > > ASN1 specification. If not posssible can u send me some mailing
> > > list so that
> > > i can get some info regarding this.Please help me in this regard
> > >
> > > Regards
> > > Pajnananda Tripathy
> > >
> > >
