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diff --git a/Doc/pycrypt.rst b/Doc/pycrypt.rst index 2c46d92..4b8114b 100644 --- a/Doc/pycrypt.rst +++ b/Doc/pycrypt.rst @@ -852,7 +852,32 @@ corresponding length; the ``get_bytes()`` method of a ``RandomPool`` object will serve the purpose nicely, as will the ``read()`` method of an opened file such as ``/dev/random``. -**getRandomNumber(N, randfunc)**: +**getStrongPrime(N, e=0, false_positive_prob=1e-6, randfunc=None)**: +Return a random strong ``N``-bit prime number. +In this context p is a strong prime if p-1 and p+1 have at +least one large prime factor. +``N`` should be a multiple of 128 and > 512. + +If ``e`` is provided the returned prime p-1 will be coprime to ``e`` +and thus suitable for RSA where e is the public exponent. + +The optional ``false_positive_prob`` is the statistical probability +that true is returned even though it is not (pseudo-prime). +It defaults to 1e-6 (less than 1:1000000). +Note that the real probability of a false-positive is far less. This is +just the mathematically provable limit. + +``randfunc`` should take a single int parameter and return that +many random bytes as a string. +If randfunc is omitted, then ``Random.new().read`` is used. + +**getRandomNBitInteger(N, randfunc)**: +Return an ``N``-bit random number, using random data obtained from the +function ``randfunc``. As usual, ``randfunc`` must take a single +integer argument and return a string of random data of the +corresponding length. + +**getRandomNBitInteger(N, randfunc)**: Return an ``N``-bit random number, using random data obtained from the function ``randfunc``. As usual, ``randfunc`` must take a single integer argument and return a string of random data of the |