# Testing sha module (NIST's Secure Hash Algorithm)

# 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

from pypy.lib import sha 

class TestSHA: 
    def check(self, data, digest):
        computed = sha.new(data).hexdigest()
        assert computed == digest

    def test_case_1(self):
        self.check("abc",
                   "a9993e364706816aba3e25717850c26c9cd0d89d")

    def test_case_2(self):
        self.check("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
                   "84983e441c3bd26ebaae4aa1f95129e5e54670f1")

    def disabled_too_slow_test_case_3(self):
        self.check("a" * 1000000,
                   "34aa973cd4c4daa4f61eeb2bdbad27316534016f")


def test_attributes():
    assert sha.digest_size == 20
    assert sha.digestsize == 20
    assert sha.blocksize == 1
    assert sha.sha().digest_size == 20
    assert sha.sha().digestsize == 20