SAGE & cryptology - Revision history

PhilippeTeuwen: /* Misc */

2010-04-13T07:48:28Z

Misc

← Older revision		Revision as of 07:48, 13 April 2010
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	* [http://labix.org/python-mcrypt Python-mcrypt]<br> python-mcrypt is a comprehensive Python interface to the mcrypt library, which is a library providing a uniform interface to several symmetric encryption algorithms. It is intended to have a simple interface to access encryption algorithms in ofb, cbc, cfb, ecb and stream modes. The algorithms it supports are DES, 3DES, RIJNDAEL, Twofish, IDEA, GOST, CAST-256, ARCFOUR, SERPENT, SAFER+, and more.		* [http://labix.org/python-mcrypt Python-mcrypt]<br> python-mcrypt is a comprehensive Python interface to the mcrypt library, which is a library providing a uniform interface to several symmetric encryption algorithms. It is intended to have a simple interface to access encryption algorithms in ofb, cbc, cfb, ecb and stream modes. The algorithms it supports are DES, 3DES, RIJNDAEL, Twofish, IDEA, GOST, CAST-256, ARCFOUR, SERPENT, SAFER+, and more.
	* [http://del.icio.us/tag/python%2Bcrypto on Del.icio.us]		* [http://del.icio.us/tag/python%2Bcrypto on Del.icio.us]
			* [http://mikeivanov.com/pc/python-crypto.pdf Comparison of Python crypto modules (pdf)]

	==Wishes==		==Wishes==

Newacct at 06:59, 24 December 2009

2009-12-24T06:59:37Z

← Older revision		Revision as of 06:59, 24 December 2009
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	def long2string(i):		def long2string(i):
	s='0'+hex(i)[2:-1]		s='0'+hex(i)[2:-1]
	return ~~binascii.unhexlify(~~s[len(s) % 2:])		return s[len(s) % 2:].decode('hex')
	timeit long2string(123456789012345678901234)		timeit long2string(123456789012345678901234)
	#100000 loops, best of 3: 2.7 µs per loop		#100000 loops, best of 3: 2.7 µs per loop
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	===Python===		===Python===
	*~~binascii module:~~ conversion between "binary string" and "hexadecimal string"		*conversion between "binary string" and "hexadecimal string"
	** convert hexadecimal to appropriate string input via:<br>''sage: ~~import binascii''<br>''sage: binascii.unhexlify(~~"A0B1C2")''		** convert hexadecimal to appropriate string input via:<br>''sage: "A0B1C2".decode('hex')''
	** convert string output to hexadecimal via:<br>''sage: ~~import binascii''<br>''sage: binascii.hexlify(~~"\xA0\xB1\xC2")''		** convert string output to hexadecimal via:<br>''sage: "\xA0\xB1\xC2".encode('hex')''
	* modules: hmac, md5, sha, hashlib[http://docs.python.org/lib/module-hashlib.html] (contains: md5(), sha1(), sha224(), sha256(), sha384(), and sha512())		* modules: hmac, md5, sha, hashlib[http://docs.python.org/lib/module-hashlib.html] (contains: md5(), sha1(), sha224(), sha256(), sha384(), and sha512())

Tiftof: /* Misc */

2008-09-05T09:43:27Z

Misc

← Older revision		Revision as of 09:43, 5 September 2008
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	*[http://www.cryptool.org/ Cryptool]: open source windows program for educational use of cryptography		*[http://www.cryptool.org/ Cryptool]: open source windows program for educational use of cryptography
	*[http://www.libtom.org LibtomCrypt]: C library with lots of stuff with good documentation		*[http://www.libtom.org LibtomCrypt]: C library with lots of stuff with good documentation
			*[https://sourceforge.net/projects/cryptopy/ CryptoPy]: has some code to analyze SBox<br> AES Sbox Analysis - a simple analysis of the AES Sbox that determines the number and size of the permutation subgroups in the transformation. Could be extended to examine any Sbox ...
	*[http://www.stuvel.eu/rsa RSA implementation in Python]		*[http://www.stuvel.eu/rsa RSA implementation in Python]
	* [http://jclement.ca/software/pyrijndael/ PyRijndael]		* [http://jclement.ca/software/pyrijndael/ PyRijndael]

Tiftof: /* Misc */

2008-09-05T08:56:27Z

Misc

← Older revision		Revision as of 08:56, 5 September 2008
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	*[http://twhiteman.netfirms.com/des.html pyDes]: python implementation of DES and 3DES		*[http://twhiteman.netfirms.com/des.html pyDes]: python implementation of DES and 3DES
	*[http://www.cryptool.org/ Cryptool]: open source windows program for educational use of cryptography		*[http://www.cryptool.org/ Cryptool]: open source windows program for educational use of cryptography
			*[http://www.libtom.org LibtomCrypt]: C library with lots of stuff with good documentation
	*[http://www.stuvel.eu/rsa RSA implementation in Python]		*[http://www.stuvel.eu/rsa RSA implementation in Python]
	* [http://jclement.ca/software/pyrijndael/ PyRijndael]		* [http://jclement.ca/software/pyrijndael/ PyRijndael]

Tiftof at 12:46, 1 September 2008

2008-09-01T12:46:00Z

← Older revision		Revision as of 12:46, 1 September 2008
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	==[[Sage Cross Reference Table of Wishes and Availability \| Cross Reference Table: wishes <-> availability]]==		==[[Sage Cross Reference Table of Wishes and Availability \| Cross Reference Table: wishes <-> availability]]==
	==[[Sage Sandbox]]==		==[[Sage Sandbox]]==
			==[[PyCryptoPlus]]==

Tiftof: /* Misc */

2008-08-29T07:31:12Z

Misc

← Older revision		Revision as of 07:31, 29 August 2008
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	*** [http://py.vaults.ca/apyllo.py?find=crypt Vaults of Parnassus]		*** [http://py.vaults.ca/apyllo.py?find=crypt Vaults of Parnassus]
	** [http://wiki.python.org/moin/CodingProjectIdeas/Libraries Python Coding Project Ideas]: M2Crypto & TLS Lite are mentioned there		** [http://wiki.python.org/moin/CodingProjectIdeas/Libraries Python Coding Project Ideas]: M2Crypto & TLS Lite are mentioned there
			* Blockcipher API for ECB, CBC, CFB & OFB: [http://www.nightsong.com/phr/crypto/blockcipher.tgz]

	'''To be looked at:'''		'''To be looked at:'''

Tiftof: /* PyCrypto, the Python Cryptography Toolkit */

2008-08-26T15:35:08Z

PyCrypto, the Python Cryptography Toolkit

← Older revision		Revision as of 15:35, 26 August 2008
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	** AES & DES example: [http://www.yobi.be:8300/home/pub/7 on Sage Notebook]		** AES & DES example: [http://www.yobi.be:8300/home/pub/7 on Sage Notebook]
	** All block cipher support the interface described in [http://www.python.org/dev/peps/pep-0272/ PEP 272]		** All block cipher support the interface described in [http://www.python.org/dev/peps/pep-0272/ PEP 272]
	** Chaining modes: ECB, CBC, CFB and ~~PGP~~		** Chaining modes: ECB, CBC, CFB, PGP, OFB and CTR
	** Possibilities: Define a new cipher object after importing the module and define the key, mode (cbc,cfb,ecb or pgp) and possible IV.<br>The object gives you two methods: 'encrypt()' and 'decrypt()'.<br>For AES: S-Box not modifiable, LookUp Tables are being used.		** Possibilities: Define a new cipher object after importing the module and define the key, mode (cbc,cfb,ecb or pgp) and possible IV.<br>The object gives you two methods: 'encrypt()' and 'decrypt()'.<br>For AES: S-Box not modifiable, LookUp Tables are being used.
	* '''Stream encryption algorithms''': ARC4, simple XOR		* '''Stream encryption algorithms''': ARC4, simple XOR

Tiftof: /* TODO */

2008-08-25T13:24:14Z

TODO

← Older revision		Revision as of 13:24, 25 August 2008
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	</blockquote>		</blockquote>
	* analyse structure of integers and strings and see if the representation from sage is compatible with the one from python		* analyse structure of integers and strings and see if the representation from sage is compatible with the one from python
			** Integers:<br>Integers in Sage are a different type than the Python integers. Problems can occur when executing standard python code in Sage. To avoid problems: add 'r' after a number to let it be interpreted as a Python integer.<br>More info:<br>Google Groups: [http://groups.google.com/group/sage-support/browse_thread/thread/49f5e14f36083782/f97f6997d5164da0] [http://groups.google.com/group/sage-support/browse_thread/thread/a815fa8c73411da3/6c967fbd741a31c7]<br>Sage Tutorial on differences caused by the Sage preparser: [http://www.sagemath.org/doc/tut/node72.html]
			** Strings:<br>Strings in Sage are the same type as Python strings
	* analyse the format of objects used by different libraries and see if they are compatible		* analyse the format of objects used by different libraries and see if they are compatible
			** Almost all libraries used "binary strings" as input/output with some exceptions:
			*** PyCrypto: RSA signatures are "long"
			*** TLS Lite: RSA signatures are "array of bytes" (defined by the TLS Lite library)
	* write a unified API for the different libraries		* write a unified API for the different libraries
	* write wrapper for internal C library		* write wrapper for internal C library

PhilippeTeuwen: /* TODO */

2008-08-22T11:39:34Z

TODO

← Older revision		Revision as of 11:39, 22 August 2008
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	==TODO==		==TODO==
	* check licensing of different packages and compare them to requirements for sage		* check licensing of different packages and compare them to requirements for sage
			** PyCrypto:
			<blockquote> I've filed a bug in PyCrypto's bug tracker: https://bugs.launchpad.net/pycrypto/+bug/260130
			The PyCrypto licensing status is a bit of a mess. It looks like a bunch of reference implementations were simply copied-and-pasted into the source tree, and each has its own licensing statement.
			I recommend looking at each source file and making a judgment for yourself.
			I'm slowly working on a new release of PyCrypto (I've just taken over from Andrew Kuchling). In the next release, I'll try to document things better, and fix the most obvious problems (I've already written a replacement for RIPEMD.c).
			However, some of the software is unattributed. I assume that most of it was written by A.M. Kuchling, but I can't be totally sure. I'll try to contact Andrew and see if he can clear things up.
			- Dwayne
			</blockquote>
	* analyse structure of integers and strings and see if the representation from sage is compatible with the one from python		* analyse structure of integers and strings and see if the representation from sage is compatible with the one from python
	* analyse the format of objects used by different libraries and see if they are compatible		* analyse the format of objects used by different libraries and see if they are compatible

PhilippeTeuwen at 14:06, 18 August 2008

2008-08-18T14:06:04Z

← Older revision		Revision as of 14:06, 18 August 2008
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			Back to [[Sage]]
	==Discussions==		==Discussions==
	* [http://groups.google.com/group/sage-devel/browse_thread/thread/9557f299b1ec2fab?hl=en this thread in the ML]		* [http://groups.google.com/group/sage-devel/browse_thread/thread/9557f299b1ec2fab?hl=en this thread in the ML]