| |
| 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 |