# Test hashlib module

#

# $Id: test_hashlib.py 66496 2008-09-18 01:22:16Z benjamin.peterson $

#

#  Copyright (C) 2005   Gregory P. Smith (greg@krypto.org)

#  Licensed to PSF under a Contributor Agreement.

#

import hashlib

import unittest

from test import test_support

from test.test_support import _4G, precisionbigmemtest

def hexstr(s):

    import string

    h = string.hexdigits

    r = ''

    for c in s:

        i = ord(c)

        r = r + h[(i >> 4) & 0xF] + h[i & 0xF]

    return r

class HashLibTestCase(unittest.TestCase):

    supported_hash_names = ( 'md5', 'MD5', 'sha1', 'SHA1',

                             'sha224', 'SHA224', 'sha256', 'SHA256',

                             'sha384', 'SHA384', 'sha512', 'SHA512' )

    def test_unknown_hash(self):

        try:

            hashlib.new('spam spam spam spam spam')

        except ValueError:

            pass

        else:

            self.assert_(0 == "hashlib didn't reject bogus hash name")

    def test_hexdigest(self):

        for name in self.supported_hash_names:

            h = hashlib.new(name)

            self.assert_(hexstr(h.digest()) == h.hexdigest())

    def test_large_update(self):

        aas = 'a' * 128

        bees = 'b' * 127

        cees = 'c' * 126

        for name in self.supported_hash_names:

            m1 = hashlib.new(name)

            m1.update(aas)

            m1.update(bees)

            m1.update(cees)

            m2 = hashlib.new(name)

            m2.update(aas + bees + cees)

            self.assertEqual(m1.digest(), m2.digest())

    def check(self, name, data, digest):

        # test the direct constructors

        computed = getattr(hashlib, name)(data).hexdigest()

        self.assert_(computed == digest)

        # test the general new() interface

        computed = hashlib.new(name, data).hexdigest()

        self.assert_(computed == digest)

    def test_case_md5_0(self):

        self.check('md5', '', 'd41d8cd98f00b204e9800998ecf8427e')

    def test_case_md5_1(self):

        self.check('md5', 'abc', '900150983cd24fb0d6963f7d28e17f72')

    def test_case_md5_2(self):

        self.check('md5', 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789',

                   'd174ab98d277d9f5a5611c2c9f419d9f')

    @precisionbigmemtest(size=_4G + 5, memuse=1)

    def test_case_md5_huge(self, size):

        if size == _4G + 5:

            try:

                self.check('md5', 'A'*size, 'c9af2dff37468ce5dfee8f2cfc0a9c6d')

            except OverflowError:

                pass # 32-bit arch

    @precisionbigmemtest(size=_4G - 1, memuse=1)

    def test_case_md5_uintmax(self, size):

        if size == _4G - 1:

            try:

                self.check('md5', 'A'*size, '28138d306ff1b8281f1a9067e1a1a2b3')

            except OverflowError:

                pass # 32-bit arch

    # use the three examples from Federal Information Processing Standards

    # Publication 180-1, Secure Hash Standard,  1995 April 17

    # http://www.itl.nist.gov/div897/pubs/fip180-1.htm

    def test_case_sha1_0(self):

        self.check('sha1', "",

                   "da39a3ee5e6b4b0d3255bfef95601890afd80709")

    def test_case_sha1_1(self):

        self.check('sha1', "abc",

                   "a9993e364706816aba3e25717850c26c9cd0d89d")

    def test_case_sha1_2(self):

        self.check('sha1', "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",

                   "84983e441c3bd26ebaae4aa1f95129e5e54670f1")

    def test_case_sha1_3(self):

        self.check('sha1', "a" * 1000000,

                   "34aa973cd4c4daa4f61eeb2bdbad27316534016f")

    # use the examples from Federal Information Processing Standards

    # Publication 180-2, Secure Hash Standard,  2002 August 1

    # http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf

    def test_case_sha224_0(self):

        self.check('sha224', "",

          "d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f")

    def test_case_sha224_1(self):

        self.check('sha224', "abc",

          "23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7")

    def test_case_sha224_2(self):

        self.check('sha224',

          "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",

          "75388b16512776cc5dba5da1fd890150b0c6455cb4f58b1952522525")

    def test_case_sha224_3(self):

        self.check('sha224', "a" * 1000000,

          "20794655980c91d8bbb4c1ea97618a4bf03f42581948b2ee4ee7ad67")

    def test_case_sha256_0(self):

        self.check('sha256', "",

          "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")

    def test_case_sha256_1(self):

        self.check('sha256', "abc",

          "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad")

    def test_case_sha256_2(self):

        self.check('sha256',

          "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",

          "248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1")

    def test_case_sha256_3(self):

        self.check('sha256', "a" * 1000000,

          "cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0")

    def test_case_sha384_0(self):

        self.check('sha384', "",

          "38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da"+

          "274edebfe76f65fbd51ad2f14898b95b")

    def test_case_sha384_1(self):

        self.check('sha384', "abc",

          "cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed"+

          "8086072ba1e7cc2358baeca134c825a7")

    def test_case_sha384_2(self):

        self.check('sha384',

                   "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"+

                   "hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",

          "09330c33f71147e83d192fc782cd1b4753111b173b3b05d22fa08086e3b0f712"+

          "fcc7c71a557e2db966c3e9fa91746039")

    def test_case_sha384_3(self):

        self.check('sha384', "a" * 1000000,

          "9d0e1809716474cb086e834e310a4a1ced149e9c00f248527972cec5704c2a5b"+

          "07b8b3dc38ecc4ebae97ddd87f3d8985")

    def test_case_sha512_0(self):

        self.check('sha512', "",

          "cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce"+

          "47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e")

    def test_case_sha512_1(self):

        self.check('sha512', "abc",

          "ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a"+

          "2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f")

    def test_case_sha512_2(self):

        self.check('sha512',

                   "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"+

                   "hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",

          "8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018"+

          "501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909")

    def test_case_sha512_3(self):

        self.check('sha512', "a" * 1000000,

          "e718483d0ce769644e2e42c7bc15b4638e1f98b13b2044285632a803afa973eb"+

          "de0ff244877ea60a4cb0432ce577c31beb009c5c2c49aa2e4eadb217ad8cc09b")

def test_main():

    test_support.run_unittest(HashLibTestCase)

if __name__ == "__main__":

    test_main()