Package web2py :: Package gluon :: Module utils

Module utils

This file is part of the web2py Web Framework Copyrighted by Massimo Di Pierro <mdipierro@cs.depaul.edu> License: LGPLv3 (http://www.gnu.org/licenses/lgpl.html)

This file specifically includes utilities for security.

Functions

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md5_hash(text)
Generate a md5 hash with the given text

source code

simple_hash(text, digest_alg='md5')
Generates hash with the given text using the specified digest hashing algorithm source code

get_digest(value)
Returns a hashlib digest algorithm from a string

source code

hmac_hash(value, key, digest_alg='md5', salt=global_settings.applications_parent) source code

initialize_urandom()
This function and the web2py_uuid follow from the following discussion: http://groups.google.com/group/web2py-developers/browse_thread/thread/7fd5789a7da3f09

source code

web2py_uuid()
This function follows from the following discussion: http://groups.google.com/group/web2py-developers/browse_thread/thread/7fd5789a7da3f09

source code

Variables

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logger = logging.getLogger("web2py")

ctokens = [201, 47, 247, 170, 36, 180, 201, 47, 247, 170, 36, ...

Function Details

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initialize_urandom()

source code

This function and the web2py_uuid follow from the following discussion: http://groups.google.com/group/web2py-developers/browse_thread/thread/7fd5789a7da3f09

At startup web2py compute a unique ID that identifies the machine by adding uuid.getnode() + int(time.time() * 1e3)

This is a 48-bit number. It converts the number into 16 8-bit tokens. It uses this value to initialize the entropy source ('/dev/urandom') and to seed random.

If os.random() is not supported, it falls back to using random and issues a warning.

web2py_uuid()

source code

This function follows from the following discussion: http://groups.google.com/group/web2py-developers/browse_thread/thread/7fd5789a7da3f09

It works like uuid.uuid4 except that tries to use os.urandom() if possible and it XORs the output with the tokens uniquely associated with this machine.

Variables Details

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ctokens

Value:

[201,
 47,
 247,
 170,
 36,
 180,
 201,
 47,
...