Re: [ASN.1] Urgent

[Anil]

hello,
    I am not sure about this. But I am sending one attachment, it may
helpful to you.Otherwise gothrough that site
http://renoir.vill.edu/~cassel/netbook/ber/node3.html#id_encode
Regards
Anil

Title: Identifier

   
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Identifier
  
The identifier, or tag, is encoded as one or more octets as shown in Figure 
. It gives 
the type of the data specified in the content component. In a single-octet 
identifier, bits 8 and 7 represent a class (UNIVERSAL is 00, APPLICATION is 01, 
CONTEXT-SPECIFIC is 10, and PRIVATE is 11), bit 6 specifies the data element as 
primitive (0) or structured (1), and bits 5 through 1 give the tag number. For 
example, 00000011 indicates that the tag class is UNIVERSAL (00), the data 
element is primitive (0), and the tag number is 3 (00011), the BIT STRING tag 
number. 

  
Figure: 
Identifier (Tag) encoding  


More than five bits, hence additional octets, are required when the tag 
number is greater than 31. In that case, bits 5 through 1 of the first octet are 
1 and each remaining octet has a 1 or 0 in bit 8, depending on whether the tag 
number is continued in at least one or no octet, respectively. For example, the 
tag APPLICATION 293 is encoded as 01111111 10000010 00100101. 





boots cassel 
Tue Feb 27 17:07:18 EST 1996