ó *§ÑVc@sdZddlZddlZddlmZddlmZddlm Z m Z m ZmZdefd„ƒYZeeeƒZeƒZeZd„Zd „Zd „Zd „Zed „Zd „Zed„Zd„Zd„Ze e ddƒdkr [ne j"ƒdS(s* PRNG management routines, thin wrappers. iÿÿÿÿN(tpartial(t integer_types(tffitlibtexception_from_error_queuet path_stringtErrorcBseZdZRS(s An error occurred in an :mod:`OpenSSL.rand` API. If the current RAND method supports any errors, this is raised when needed. The default method does not raise this when the entropy pool is depleted. Whenever this exception is raised directly, it has a list of error messages from the OpenSSL error queue, where each item is a tuple *(lib, function, reason)*. Here *lib*, *function* and *reason* are all strings, describing where and what the problem is. See :manpage:`err(3)` for more information. (t__name__t __module__t__doc__(((s0/usr/lib/python2.7/dist-packages/OpenSSL/rand.pyRs cCst|tƒstdƒ‚n|dkr9tdƒ‚ntjd|ƒ}tj||ƒ}|dkrstƒntj |ƒS(sÑ Get some random bytes from the PRNG as a string. This is a wrapper for the C function ``RAND_bytes``. :param num_bytes: The number of bytes to fetch. :return: A string of random bytes. snum_bytes must be an integerisnum_bytes must not be negativeschar[]iÿÿÿÿ( t isinstancet_integer_typest TypeErrort ValueErrort_ffitnewt_libt RAND_bytest_raise_current_errortbuffer(t num_bytest result_buffert result_code((s0/usr/lib/python2.7/dist-packages/OpenSSL/rand.pytbytes)s    cCsYt|tƒstdƒ‚nt|tƒs<tdƒ‚ntj|t|ƒ|ƒdS(s| Mix bytes from *string* into the PRNG state. The *entropy* argument is (the lower bound of) an estimate of how much randomness is contained in *string*, measured in bytes. For more information, see e.g. :rfc:`1750`. :param buffer: Buffer with random data. :param entropy: The entropy (in bytes) measurement of the buffer. :return: :obj:`None` sbuffer must be a byte stringsentropy must be an integerN(R t_builtin_bytesR tintRtRAND_addtlen(Rtentropy((s0/usr/lib/python2.7/dist-packages/OpenSSL/rand.pytaddCs cCs8t|tƒstdƒ‚ntj|t|ƒƒdS(s› Equivalent to calling :func:`add` with *entropy* as the length of *buffer*. :param buffer: Buffer with random data :return: :obj:`None` sbuffer must be a byte stringN(R RR Rt RAND_seedR(R((s0/usr/lib/python2.7/dist-packages/OpenSSL/rand.pytseed[scCs tjƒS(s’ Check whether the PRNG has been seeded with enough data. :return: :obj:`True` if the PRNG is seeded enough, :obj:`False` otherwise. (Rt RAND_status(((s0/usr/lib/python2.7/dist-packages/OpenSSL/rand.pytstatusjscCsxtjdtƒt|tƒs.tdƒ‚n|tkrCd}nt|tƒsatdƒ‚ntt j |ƒƒ|S(s Query the system random source and seed the PRNG. Does *not* actually query the EGD. .. deprecated:: 16.0.0 EGD was only necessary for some commercial UNIX systems that all reached their ends of life more than a decade ago. See `pyca/cryptography#1636 `_. :param path: Ignored. :param bytes: (optional) The number of bytes to read, default is 255. :returns: ``len(bytes)`` or 255 if not specified. s.OpenSSL.rand.egd() is deprecated as of 16.0.0.spath must be a byte stringiÿsbytes must be an integer( twarningstwarntDeprecationWarningR RR t _unspecifiedRRtosturandom(tpathR((s0/usr/lib/python2.7/dist-packages/OpenSSL/rand.pytegdss   cCstjƒdS(s‚ Erase the memory used by the PRNG. This is a wrapper for the C function ``RAND_cleanup``. :return: :obj:`None` N(Rt RAND_cleanup(((s0/usr/lib/python2.7/dist-packages/OpenSSL/rand.pytcleanup“s cCsOt|ƒ}|tkr!d}nt|tƒs?tdƒ‚ntj||ƒS(sq Read *maxbytes* of data from *filename* and seed the PRNG with it. Read the whole file if *maxbytes* is not specified or negative. :param filename: The file to read data from (``bytes`` or ``unicode``). :param maxbytes: (optional) The number of bytes to read. Default is to read the entire file. :return: The number of bytes read iÿÿÿÿsmaxbytes must be an integer(t _path_stringR%R RR RtRAND_load_file(tfilenametmaxbytes((s0/usr/lib/python2.7/dist-packages/OpenSSL/rand.pyt load_fileŸs   cCst|ƒ}tj|ƒS(s Write a number of random bytes (currently 1024) to the file *path*. This file can then be used with :func:`load_file` to seed the PRNG again. :param filename: The file to write data to (``bytes`` or ``unicode``). :return: The number of bytes written. (R,RtRAND_write_file(R.((s0/usr/lib/python2.7/dist-packages/OpenSSL/rand.pyt write_fileµs cCstjƒdS(sr Add the current contents of the screen to the PRNG state. Availability: Windows. :return: None N(Rt RAND_screen(((s0/usr/lib/python2.7/dist-packages/OpenSSL/rand.pytscreenÃsR3(#R R&R"t functoolsRtsixRR t OpenSSL._utilRRRRRt_exception_from_error_queueRR,t ExceptionRRtobjectR%RRRRR!R)R+R0R2R4tgetattrtNonetERR_load_RAND_strings(((s0/usr/lib/python2.7/dist-packages/OpenSSL/rand.pyts*  "