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gerrit.osmocom.org / asn1c / refs/heads/old-master / . / FAQ
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vlmcfa6f742004-08-20 13:38:07 +0000[diff] [blame]1
vlm3990f892005-03-20 13:26:08 +0000[diff] [blame]21.Q: Is it possible to build the asn1c compiler on Win32?
31.A:
4 At this point, the asn1c source code is tied to GCC-specific
5 extensions in several key places. The CYGWIN environment with
6 gcc compiler may be what are you looking for.
vlm547269c2005-02-28 15:34:47 +0000[diff] [blame]7
vlm3990f892005-03-20 13:26:08 +0000[diff] [blame]8 Please also consider using the Online ASN.1 compiler at
9 http://lionet.info/asn1c
10 which generates platform-independent code.
11
12
132.Q: How to build a simplest BER (XER) encoder or decoder?
142.A:
vlm30ea5442005-12-22 21:36:47 +0000[diff] [blame]15 Please check the "Quick Start Guide" on ./doc/asn1c-quick.pdf
16 Please check the "Examples" section of ./doc/asn1c-usage.pdf
vlm547269c2005-02-28 15:34:47 +0000[diff] [blame]17
18 Also, try the following to build the X.509v3 parser:
19
20 cd ./examples/sample.source.PKIX1
21 make
22 ./x509dump -h
23
24
vlm3990f892005-03-20 13:26:08 +0000[diff] [blame]253.Q: Your compiler supplies a der_encode() procedure. How do I encode BER?
263.A:
vlmcfa6f742004-08-20 13:38:07 +0000[diff] [blame]27 The DER (and CER) are stricter subsets of a more generic BER encoding
28 method. If you encode data with DER or CER, all BER-conformant decoders
29 will easily understand that. Hence, to encode data in the BER format,
30 simply use the DER encoder, der_encode().
31
32 See also: ISO/IEC 8825-1 / X.690:
33 "ASN.1 encoding rules: Specification of
34 Basic Encoding Rules (BER),
35 Canonical Encoding Rules (CER) and
36 Distinguished Encoding Rules (DER)"
37
vlme6bdf512004-09-05 10:41:17 +0000[diff] [blame]38
vlme6bdf512004-09-05 10:41:17 +0000[diff] [blame]39
40--
41Lev Walkin
42vlm@lionet.info