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50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
#
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# Test suite to check compliance with PEP 247, the standard API for
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# hashing algorithms.
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#
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import md5, sha, hmac
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def check_hash_module(module, key=None):
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assert hasattr(module, 'digest_size'), "Must have digest_size"
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assert (module.digest_size is None or
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module.digest_size > 0), "digest_size must be None or positive"
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if key is not None:
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obj1 = module.new(key)
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obj2 = module.new(key, "string")
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h1 = module.new(key, "string").digest()
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obj3 = module.new(key) ; obj3.update("string") ; h2 = obj3.digest()
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assert h1 == h2, "Hashes must match"
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else:
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obj1 = module.new()
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obj2 = module.new("string")
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h1 = module.new("string").digest()
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obj3 = module.new() ; obj3.update("string") ; h2 = obj3.digest()
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assert h1 == h2, "Hashes must match"
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assert hasattr(obj1, 'digest_size'), "Objects must have digest_size attr"
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if module.digest_size is not None:
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assert obj1.digest_size == module.digest_size, "digest_size must match"
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assert obj1.digest_size == len(h1), "digest_size must match actual size"
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obj1.update("string")
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obj_copy = obj1.copy()
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assert obj1.digest() == obj_copy.digest(), "Copied objects must match"
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assert obj1.hexdigest() == obj_copy.hexdigest(), \
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"Copied objects must match"
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digest, hexdigest = obj1.digest(), obj1.hexdigest()
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hd2 = ""
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for byte in digest:
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hd2 += "%02x" % ord(byte)
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assert hd2 == hexdigest, "hexdigest doesn't appear correct"
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print 'Module', module.__name__, 'seems to comply with PEP 247'
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if __name__ == '__main__':
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check_hash_module(md5)
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check_hash_module(sha)
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check_hash_module(hmac, key='abc')
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