Difference between revisions of "PyCryptoPlus"

Revision as of 14:37, 2 September 2008

ciphers from pycrypto are being used with the python chaining modes and not the original pycrypto ones
=> plaintext can be supplied in arbitrary sizes instead of multiples of the blocksize like in pycrypto: the new chaining modes keep a cache to encrypt/decrypt data once the cachesize holds at least a blocksize of data
new possibilities:
- Serpent, Twofish
- CMAC, XTS, CTR mod

add chaining modes: CMAC, CTR mod?
further importing of pycrypto
make test vectors available as variables
add tests:
- CBC for serpent, twofish, blowfish
- XTS is only tested by comparing deciphered ciphertext, not by checking ciphertext
check other implementation of Blowfish
final() method of chains
- add a cipher.final() method? pycrypto doesn't have it, but it doesn't really conflict with the pycrypto API. It will just extend it
- final() method should use padding. Choose padding function at initialization of the cipher => again: extending the API
XTS
- XTS-AES? XTS-AES just denotes XTS using AES cipher? Make only that one available (which is the case for the moment)?
- supply XTS keys by splitting 1 big key or by supplying two keys?
add rijndael instead of only AES

used from python truecrypt implementation
all original code is under MIT license (much freedom according to [1])
- pyTwofish (untouched)
  python truecrypt author isn't the original author = > extra copyright notice that should be left in place
- pyserpent (untouched)
  python truecrypt author isn't the original author = > extra copyright notice that should be left in place
- XTS (modified)
  python truecrypt author is the original author => only MIT License
- GF2n.py(untouched)
  python truecrypt author is the original author => only MIT License
pyblowfish (untouched)
gpl or artistic license
gpl is compatible with public domain
Note from Phil: take care with GPL "viral" behavior, come&talk to me...
rijndael.py (untouched)
using tls lite (public domain) implementation which uses code from Bram Cohen (public domain)
pyDes (untouched)
public domain according to its homepage
blockciphers CBC, ECB, CTR from [2] (modified)
keep copyright notice in place?
CMAC: omac.py
GPL but not really used it, just used as a starting point

@@ Line 37: / Line 37: @@
 ==Info==
 ===Test Vectors===
+*AES: http://cryptome.org/bcm/sp800-38a.htm<br> zip file contains a full set of round values for each of the 25 block and key length combinations from 128, 160, 192, 224 and 256 bits for '''one input block''' and one key value
-*AES http://cryptome.org/bcm/sp800-38a.htm
+*Rijndael: http://fp.gladman.plus.com/cryptography_technology/rijndael/
-*DES (enkel ECB) http://www.skepticfiles.org/faq/testdes.htm
+*DES (enkel ECB): http://www.skepticfiles.org/faq/testdes.htm
 *Blowfish: http://www.schneier.com/code/vectors.txt
 *Serpent: http://www.cs.technion.ac.il/~biham/Reports/Serpent/