[SIPForum-discussion] HELP NEEDED URGENTLY

[Ganesh Bhattathiri]

Hi  People,

 

Some of the values in the ABNF is suppose to be 32LHEX (32  Hex Digits in
lowercase), but the problem is that when implemented these values are
encoded into a base64, how will I go forward with this problem now? How will
I parse such Headers, do I go against the ABNF and use BASE64 in the
expression or do I use 32LHEX and take a risk of getting an error?

 

The following is one of the header which has the problem what I am speaking
about.

 

ABNF

 

Identity= "Identity" HCOLON signed-identity-digest

signed-identity-digest= LDQUOT 32LHEX RDQUOT

 

While Implementing

 

Identity:
     "sv5CTo05KqpSmtHt3dcEiO/1CWTSZtnG3iV+1nmurLXV/HmtyNS7Ltrg9dlxkWzo
      eU7d7OV8HweTTDobV3itTmgPwCFjaEmMyEI3d7SyN21yNDo2ER/Ovgtw0Lu5csIp
      pPqOg1uXndzHbG7mR6Rl9BnUhHufVRbp51Mn3w0gfUs="
 
the above value of identity is the BASE64 encoded. How do I parse it? Please
help.
 
Can you help me out with this?
 
RFC 4474 is the RFC for this header used in SIP.

 

Thanks and regards,

 

Ganesh

            

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