ASN.1 encoder & decoder

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  • Doug Stell
    #1

    ASN.1 encoder & decoder

    Can anyone provide guidance on building an ASN.1 decoder and encoder
    in Python? This does not have to be a general purpose implementation,
    drivenf from an ASN.1 template. It can be dedicated hard coded to a
    particular template.

    Doug Stell, celiadoug@mchsi .com
    Tags: None
    • Bruce Stephens
      #2
      Re: ASN.1 encoder & decoder

      Doug Stell <celiadoug@mchs i.comwrites:
      Can anyone provide guidance on building an ASN.1 decoder and encoder
      in Python?
      <http://sourceforge.net/projects/pyasn1/>?

        Comment

        • Doug Stell
          #3
          Re: ASN.1 encoder &amp; decoder

          I looked at pyasn1. Unfortunately, it is not useful and provides a C
          interface. Thanks, anyhow.

          I figure that I will have to write my own, but am unsure of the best
          approach. Nested lists and distionaries might be useful and I am
          looking to the feasibility of those mechanisms.

          On Fri, 25 Aug 2006 23:20:41 +0100, Bruce Stephens
          <bruce+usenet@c enderis.demon.c o.ukwrote:
          >Doug Stell <celiadoug@mchs i.comwrites:
          >
          >Can anyone provide guidance on building an ASN.1 decoder and encoder
          >in Python?
          >
          ><http://sourceforge.net/projects/pyasn1/>?

            Comment

            • Paul Rubin
              #4
              Re: ASN.1 encoder &amp; decoder

              Doug Stell <celiadoug@mchs i.comwrites:
              Can anyone provide guidance on building an ASN.1 decoder and encoder
              in Python? This does not have to be a general purpose implementation,
              drivenf from an ASN.1 template. It can be dedicated hard coded to a
              particular template.
              There might be some useful code in www.trevp.com/tlslite .

                Comment

                • Bruce Stephens
                  #5
                  Re: ASN.1 encoder &amp; decoder

                  Doug Stell <celiadoug@mchs i.comwrites:
                  I looked at pyasn1. Unfortunately, it is not useful and provides a C
                  interface. Thanks, anyhow.
                  What makes you say that? It appears to me (looking at the code in
                  CVS) to be written entirely in Python, and the home page,
                  <http://pyasn1.sourcefo rge.net/shows examples clearly with a Python
                  interface.

                  I've no idea whether or not it's useful in any other sense.

                  [...]

                    Comment

                    • etingof@gmail.com
                      #6
                      Re: ASN.1 encoder &amp; decoder

                      I looked at pyasn1. Unfortunately, it is not useful and provides a C
                      interface. Thanks, anyhow.
                      pyasn1 is a pure-python implementation. C interface is not supported.
                      I figure that I will have to write my own, but am unsure of the best
                      approach. Nested lists and distionaries might be useful and I am
                      looking to the feasibility of those mechanisms.
                      Try looking at the pyasn1 homepage http://pyasn1.sf.net where some
                      design ideas were discussed.

                      -ilya

                        Comment

                        • Doug Stell
                          #7
                          Re: ASN.1 encoder &amp; decoder

                          Thanks Paul. This is exactly the type andlevel of implementation that
                          I was looking for.

                          I will look at the other implementation again.

                          On 25 Aug 2006 16:32:46 -0700, Paul Rubin
                          <http://phr.cx@NOSPAM.i nvalidwrote:
                          >Doug Stell <celiadoug@mchs i.comwrites:
                          >Can anyone provide guidance on building an ASN.1 decoder and encoder
                          >in Python? This does not have to be a general purpose implementation,
                          >drivenf from an ASN.1 template. It can be dedicated hard coded to a
                          >particular template.
                          >
                          >There might be some useful code in www.trevp.com/tlslite .

                            Comment

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