Integer.tohex()

[pyderasn.git] / README

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-PyDERASN -- strict and fast ASN.1 DER/BER library for Python
+PyDERASN -- strict and fast ASN.1 DER/CER/BER library for Python

 
     I'm going to build my own ASN.1 library with slots and blobs!
     (C) PyDERASN's author
 
 
     I'm going to build my own ASN.1 library with slots and blobs!
     (C) PyDERASN's author
 

-* BER/CER/DER decoding, DER encoding
+* BER/CER/DER decoding, strict DER validation, DER/CER encoding

 * Basic ASN.1 data types (X.208): BOOLEAN, INTEGER, BIT STRING, OCTET
   STRING, NULL, OBJECT IDENTIFIER, ENUMERATED, all strings, UTCTime,
   GeneralizedTime, CHOICE, ANY, SEQUENCE (OF), SET (OF)
 * Size constraints checking
 * Working with sequences as high level data objects with ability to
   (un)marshall them
 * Basic ASN.1 data types (X.208): BOOLEAN, INTEGER, BIT STRING, OCTET
   STRING, NULL, OBJECT IDENTIFIER, ENUMERATED, all strings, UTCTime,
   GeneralizedTime, CHOICE, ANY, SEQUENCE (OF), SET (OF)
 * Size constraints checking
 * Working with sequences as high level data objects with ability to
   (un)marshall them

+* Aimed to be complaint with X.690-201508
+* Streaming decoding and encoding capabilities, allowing working with
+  very small memory footprint

 * Python 2.7/3.5/3.6 compatibility
 * Automatic decoding of DEFINED BY fields
 * Ability to know exact decoded objects offset and lengths in the binary
 * Python 2.7/3.5/3.6 compatibility
 * Automatic decoding of DEFINED BY fields
 * Ability to know exact decoded objects offset and lengths in the binary

+* Ability to allow BER-encoded data with knowing if any of specified
+  field has either DER or BER encoding (or possibly indefinite-length
+  encoding)
+* Ability to use mmap-ed files, memoryviews, iterators, 2-pass DER
+  encoding mode and CER encoder dealing with the writer, giving ability
+  to create huge ASN.1 encoded files with very little memory footprint
+* Ability to decode files in event generation mode, without the need to
+  keep all the data and decoded structures in the memory
+* __slots__, copy.copy() friendliness
+* Workability with pickle
+* Cython compatibility
+* Descriptive errors, with decode paths

 * Pretty printer and command-line decoder, that could conveniently
   replace utilities like either dumpasn1 or openssl asn1parse
 * Pretty printer and command-line decoder, that could conveniently
   replace utilities like either dumpasn1 or openssl asn1parse

-* __slots__, copy.copy(), pickle friendliness

 
 pyderasn is free software: see the file COPYING.LESSER for copying conditions.
 
 
 pyderasn is free software: see the file COPYING.LESSER for copying conditions.