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Direktori : /proc/thread-self/root/proc/self/root/lib64/python2.7/site-packages/M2Crypto/ |
Current File : //proc/thread-self/root/proc/self/root/lib64/python2.7/site-packages/M2Crypto/BN.py |
""" M2Crypto wrapper for OpenSSL BN (BIGNUM) API. Copyright (c) 2005 Open Source Applications Foundation. All rights reserved. """ import m2 def rand(bits, top=-1, bottom=0): """ Generate cryptographically strong random number. @param bits: Length of random number in bits. @param top: If -1, the most significant bit can be 0. If 0, the most significant bit is 1, and if 1, the two most significant bits will be 1. @param bottom: If bottom is true, the number will be odd. """ return m2.bn_rand(bits, top, bottom) def rand_range(range): """ Generate a random number in a range. @param range: Upper limit for range. @return: A random number in the range [0, range) """ return m2.bn_rand_range(range) def randfname(length): """ Return a random filename, which is simply a string where all the characters are from the set [a-zA-Z0-9]. @param length: Length of filename to return. @type length: int @return: random filename string """ letters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890' lettersLen = len(letters) fname = [] for x in range(length): fname += [letters[m2.bn_rand_range(lettersLen)]] return ''.join(fname)