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1.Q: Is it possible to build the asn1c compiler on Win32?
1.A:
At this point, the asn1c source code is tied to GCC-specific
extensions in several key places. The CYGWIN environment with
gcc compiler may be what are you looking for.
Please also consider using the Online ASN.1 compiler at
http://lionet.info/asn1c
which generates platform-independent code.
2.Q: How to build a simplest BER (XER) encoder or decoder?
2.A:
Please check the "Quick Start Guide" on ./doc/asn1c-quick.pdf
Please check the "Examples" section of ./doc/asn1c-usage.pdf
Also, try the following to build the X.509v3 parser:
cd ./examples/sample.source.PKIX1
make
./x509dump -h
3.Q: Your compiler supplies a der_encode() procedure. How do I encode BER?
3.A:
The DER (and CER) are stricter subsets of a more generic BER encoding
method. If you encode data with DER or CER, all BER-conformant decoders
will easily understand that. Hence, to encode data in the BER format,
simply use the DER encoder, der_encode().
See also: ISO/IEC 8825-1 / X.690:
"ASN.1 encoding rules: Specification of
Basic Encoding Rules (BER),
Canonical Encoding Rules (CER) and
Distinguished Encoding Rules (DER)"
--
Lev Walkin
vlm@lionet.info
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