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95 lines
3.0 KiB
Python
95 lines
3.0 KiB
Python
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# Based on FreeBSD src/lib/libcrypt/crypt.c 1.2
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# http://www.freebsd.org/cgi/cvsweb.cgi/~checkout~/src/lib/libcrypt/crypt.c?rev=1.2&content-type=text/plain
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# Original license:
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# * "THE BEER-WARE LICENSE" (Revision 42):
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# * <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
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# * can do whatever you want with this stuff. If we meet some day, and you think
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# * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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# This port adds no further stipulations. I forfeit any copyright interest.
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import md5
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def md5crypt(password, salt, magic='$1$'):
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# /* The password first, since that is what is most unknown */ /* Then our magic string */ /* Then the raw salt */
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m = md5.new()
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m.update(password + magic + salt)
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# /* Then just as many characters of the MD5(pw,salt,pw) */
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mixin = md5.md5(password + salt + password).digest()
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for i in range(0, len(password)):
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m.update(mixin[i % 16])
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# /* Then something really weird... */
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# Also really broken, as far as I can tell. -m
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i = len(password)
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while i:
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if i & 1:
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m.update('\x00')
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else:
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m.update(password[0])
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i >>= 1
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final = m.digest()
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# /* and now, just to make sure things don't run too fast */
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for i in range(1000):
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m2 = md5.md5()
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if i & 1:
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m2.update(password)
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else:
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m2.update(final)
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if i % 3:
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m2.update(salt)
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if i % 7:
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m2.update(password)
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if i & 1:
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m2.update(final)
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else:
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m2.update(password)
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final = m2.digest()
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# This is the bit that uses to64() in the original code.
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itoa64 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
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rearranged = ''
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for a, b, c in ((0, 6, 12), (1, 7, 13), (2, 8, 14), (3, 9, 15), (4, 10, 5)):
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v = ord(final[a]) << 16 | ord(final[b]) << 8 | ord(final[c])
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for i in range(4):
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rearranged += itoa64[v & 0x3f]; v >>= 6
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v = ord(final[11])
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for i in range(2):
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rearranged += itoa64[v & 0x3f]; v >>= 6
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return magic + salt + '$' + rearranged
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if __name__ == '__main__':
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def test(clear_password, the_hash):
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magic, salt = the_hash[1:].split('$')[:2]
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magic = '$' + magic + '$'
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return md5crypt(clear_password, salt, magic) == the_hash
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test_cases = (
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(' ', '$1$yiiZbNIH$YiCsHZjcTkYd31wkgW8JF.'),
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('pass', '$1$YeNsbWdH$wvOF8JdqsoiLix754LTW90'),
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('____fifteen____', '$1$s9lUWACI$Kk1jtIVVdmT01p0z3b/hw1'),
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('____sixteen_____', '$1$dL3xbVZI$kkgqhCanLdxODGq14g/tW1'),
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('____seventeen____', '$1$NaH5na7J$j7y8Iss0hcRbu3kzoJs5V.'),
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('__________thirty-three___________', '$1$HO7Q6vzJ$yGwp2wbL5D7eOVzOmxpsy.'),
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('apache', '$apr1$J.w5a/..$IW9y6DR0oO/ADuhlMF5/X1')
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)
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for clearpw, hashpw in test_cases:
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if test(clearpw, hashpw):
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print '%s: pass' % clearpw
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else:
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print '%s: FAIL' % clearpw
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