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airbag/venv/lib/python3.10/site-packages/passlib/crypto/_blowfish/unrolled.py

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初始化
3 years ago
"""passlib.crypto._blowfish.unrolled - unrolled loop implementation of bcrypt,
autogenerated by _gen_files.py
currently this override the encipher() and expand() methods
with optimized versions, and leaves the other base.py methods alone.
"""
#=============================================================================
# imports
#=============================================================================
# pkg
from passlib.crypto._blowfish.base import BlowfishEngine as _BlowfishEngine
# local
__all__ = [
"BlowfishEngine",
]
#=============================================================================
#
#=============================================================================
class BlowfishEngine(_BlowfishEngine):
def encipher(self, l, r):
"""blowfish encipher a single 64-bit block encoded as two 32-bit ints"""
(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9,
p10, p11, p12, p13, p14, p15, p16, p17) = self.P
S0, S1, S2, S3 = self.S
l ^= p0
# Feistel substitution on left word (round 0)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p1
# Feistel substitution on right word (round 1)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p2
# Feistel substitution on left word (round 2)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p3
# Feistel substitution on right word (round 3)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p4
# Feistel substitution on left word (round 4)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p5
# Feistel substitution on right word (round 5)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p6
# Feistel substitution on left word (round 6)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p7
# Feistel substitution on right word (round 7)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p8
# Feistel substitution on left word (round 8)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p9
# Feistel substitution on right word (round 9)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p10
# Feistel substitution on left word (round 10)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p11
# Feistel substitution on right word (round 11)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p12
# Feistel substitution on left word (round 12)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p13
# Feistel substitution on right word (round 13)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p14
# Feistel substitution on left word (round 14)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p15
# Feistel substitution on right word (round 15)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p16
return r ^ p17, l
def expand(self, key_words):
"""unrolled version of blowfish key expansion"""
##assert len(key_words) >= 18, "size of key_words must be >= 18"
P, S = self.P, self.S
S0, S1, S2, S3 = S
#=============================================================
# integrate key
#=============================================================
p0 = P[0] ^ key_words[0]
p1 = P[1] ^ key_words[1]
p2 = P[2] ^ key_words[2]
p3 = P[3] ^ key_words[3]
p4 = P[4] ^ key_words[4]
p5 = P[5] ^ key_words[5]
p6 = P[6] ^ key_words[6]
p7 = P[7] ^ key_words[7]
p8 = P[8] ^ key_words[8]
p9 = P[9] ^ key_words[9]
p10 = P[10] ^ key_words[10]
p11 = P[11] ^ key_words[11]
p12 = P[12] ^ key_words[12]
p13 = P[13] ^ key_words[13]
p14 = P[14] ^ key_words[14]
p15 = P[15] ^ key_words[15]
p16 = P[16] ^ key_words[16]
p17 = P[17] ^ key_words[17]
#=============================================================
# update P
#=============================================================
#------------------------------------------------
# update P[0] and P[1]
#------------------------------------------------
l, r = p0, 0
# Feistel substitution on left word (round 0)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p1
# Feistel substitution on right word (round 1)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p2
# Feistel substitution on left word (round 2)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p3
# Feistel substitution on right word (round 3)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p4
# Feistel substitution on left word (round 4)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p5
# Feistel substitution on right word (round 5)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p6
# Feistel substitution on left word (round 6)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p7
# Feistel substitution on right word (round 7)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p8
# Feistel substitution on left word (round 8)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p9
# Feistel substitution on right word (round 9)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p10
# Feistel substitution on left word (round 10)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p11
# Feistel substitution on right word (round 11)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p12
# Feistel substitution on left word (round 12)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p13
# Feistel substitution on right word (round 13)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p14
# Feistel substitution on left word (round 14)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p15
# Feistel substitution on right word (round 15)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p16
p0, p1 = l, r = r ^ p17, l
#------------------------------------------------
# update P[2] and P[3]
#------------------------------------------------
l ^= p0
# Feistel substitution on left word (round 0)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p1
# Feistel substitution on right word (round 1)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p2
# Feistel substitution on left word (round 2)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p3
# Feistel substitution on right word (round 3)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p4
# Feistel substitution on left word (round 4)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p5
# Feistel substitution on right word (round 5)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p6
# Feistel substitution on left word (round 6)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p7
# Feistel substitution on right word (round 7)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p8
# Feistel substitution on left word (round 8)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p9
# Feistel substitution on right word (round 9)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p10
# Feistel substitution on left word (round 10)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p11
# Feistel substitution on right word (round 11)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p12
# Feistel substitution on left word (round 12)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p13
# Feistel substitution on right word (round 13)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p14
# Feistel substitution on left word (round 14)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p15
# Feistel substitution on right word (round 15)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p16
p2, p3 = l, r = r ^ p17, l
#------------------------------------------------
# update P[4] and P[5]
#------------------------------------------------
l ^= p0
# Feistel substitution on left word (round 0)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p1
# Feistel substitution on right word (round 1)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p2
# Feistel substitution on left word (round 2)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p3
# Feistel substitution on right word (round 3)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p4
# Feistel substitution on left word (round 4)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p5
# Feistel substitution on right word (round 5)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p6
# Feistel substitution on left word (round 6)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p7
# Feistel substitution on right word (round 7)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p8
# Feistel substitution on left word (round 8)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p9
# Feistel substitution on right word (round 9)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p10
# Feistel substitution on left word (round 10)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p11
# Feistel substitution on right word (round 11)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p12
# Feistel substitution on left word (round 12)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p13
# Feistel substitution on right word (round 13)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p14
# Feistel substitution on left word (round 14)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p15
# Feistel substitution on right word (round 15)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p16
p4, p5 = l, r = r ^ p17, l
#------------------------------------------------
# update P[6] and P[7]
#------------------------------------------------
l ^= p0
# Feistel substitution on left word (round 0)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p1
# Feistel substitution on right word (round 1)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p2
# Feistel substitution on left word (round 2)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p3
# Feistel substitution on right word (round 3)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p4
# Feistel substitution on left word (round 4)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p5
# Feistel substitution on right word (round 5)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p6
# Feistel substitution on left word (round 6)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p7
# Feistel substitution on right word (round 7)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p8
# Feistel substitution on left word (round 8)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p9
# Feistel substitution on right word (round 9)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p10
# Feistel substitution on left word (round 10)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p11
# Feistel substitution on right word (round 11)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p12
# Feistel substitution on left word (round 12)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p13
# Feistel substitution on right word (round 13)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p14
# Feistel substitution on left word (round 14)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p15
# Feistel substitution on right word (round 15)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p16
p6, p7 = l, r = r ^ p17, l
#------------------------------------------------
# update P[8] and P[9]
#------------------------------------------------
l ^= p0
# Feistel substitution on left word (round 0)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p1
# Feistel substitution on right word (round 1)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p2
# Feistel substitution on left word (round 2)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p3
# Feistel substitution on right word (round 3)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p4
# Feistel substitution on left word (round 4)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p5
# Feistel substitution on right word (round 5)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p6
# Feistel substitution on left word (round 6)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p7
# Feistel substitution on right word (round 7)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p8
# Feistel substitution on left word (round 8)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p9
# Feistel substitution on right word (round 9)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p10
# Feistel substitution on left word (round 10)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p11
# Feistel substitution on right word (round 11)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p12
# Feistel substitution on left word (round 12)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p13
# Feistel substitution on right word (round 13)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p14
# Feistel substitution on left word (round 14)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p15
# Feistel substitution on right word (round 15)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p16
p8, p9 = l, r = r ^ p17, l
#------------------------------------------------
# update P[10] and P[11]
#------------------------------------------------
l ^= p0
# Feistel substitution on left word (round 0)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p1
# Feistel substitution on right word (round 1)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p2
# Feistel substitution on left word (round 2)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p3
# Feistel substitution on right word (round 3)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p4
# Feistel substitution on left word (round 4)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p5
# Feistel substitution on right word (round 5)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p6
# Feistel substitution on left word (round 6)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p7
# Feistel substitution on right word (round 7)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p8
# Feistel substitution on left word (round 8)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p9
# Feistel substitution on right word (round 9)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p10
# Feistel substitution on left word (round 10)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p11
# Feistel substitution on right word (round 11)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p12
# Feistel substitution on left word (round 12)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p13
# Feistel substitution on right word (round 13)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p14
# Feistel substitution on left word (round 14)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p15
# Feistel substitution on right word (round 15)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p16
p10, p11 = l, r = r ^ p17, l
#------------------------------------------------
# update P[12] and P[13]
#------------------------------------------------
l ^= p0
# Feistel substitution on left word (round 0)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p1
# Feistel substitution on right word (round 1)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p2
# Feistel substitution on left word (round 2)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p3
# Feistel substitution on right word (round 3)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p4
# Feistel substitution on left word (round 4)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p5
# Feistel substitution on right word (round 5)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p6
# Feistel substitution on left word (round 6)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p7
# Feistel substitution on right word (round 7)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p8
# Feistel substitution on left word (round 8)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p9
# Feistel substitution on right word (round 9)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p10
# Feistel substitution on left word (round 10)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p11
# Feistel substitution on right word (round 11)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p12
# Feistel substitution on left word (round 12)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p13
# Feistel substitution on right word (round 13)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p14
# Feistel substitution on left word (round 14)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p15
# Feistel substitution on right word (round 15)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p16
p12, p13 = l, r = r ^ p17, l
#------------------------------------------------
# update P[14] and P[15]
#------------------------------------------------
l ^= p0
# Feistel substitution on left word (round 0)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p1
# Feistel substitution on right word (round 1)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p2
# Feistel substitution on left word (round 2)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p3
# Feistel substitution on right word (round 3)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p4
# Feistel substitution on left word (round 4)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p5
# Feistel substitution on right word (round 5)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p6
# Feistel substitution on left word (round 6)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p7
# Feistel substitution on right word (round 7)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p8
# Feistel substitution on left word (round 8)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p9
# Feistel substitution on right word (round 9)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p10
# Feistel substitution on left word (round 10)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p11
# Feistel substitution on right word (round 11)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p12
# Feistel substitution on left word (round 12)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p13
# Feistel substitution on right word (round 13)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p14
# Feistel substitution on left word (round 14)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p15
# Feistel substitution on right word (round 15)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p16
p14, p15 = l, r = r ^ p17, l
#------------------------------------------------
# update P[16] and P[17]
#------------------------------------------------
l ^= p0
# Feistel substitution on left word (round 0)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p1
# Feistel substitution on right word (round 1)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p2
# Feistel substitution on left word (round 2)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p3
# Feistel substitution on right word (round 3)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p4
# Feistel substitution on left word (round 4)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p5
# Feistel substitution on right word (round 5)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p6
# Feistel substitution on left word (round 6)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p7
# Feistel substitution on right word (round 7)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p8
# Feistel substitution on left word (round 8)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p9
# Feistel substitution on right word (round 9)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p10
# Feistel substitution on left word (round 10)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p11
# Feistel substitution on right word (round 11)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p12
# Feistel substitution on left word (round 12)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p13
# Feistel substitution on right word (round 13)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p14
# Feistel substitution on left word (round 14)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p15
# Feistel substitution on right word (round 15)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p16
p16, p17 = l, r = r ^ p17, l
#------------------------------------------------
# save changes to original P array
#------------------------------------------------
P[:] = (p0, p1, p2, p3, p4, p5, p6, p7, p8, p9,
p10, p11, p12, p13, p14, p15, p16, p17)
#=============================================================
# update S
#=============================================================
for box in S:
j = 0
while j < 256:
l ^= p0
# Feistel substitution on left word (round 0)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p1
# Feistel substitution on right word (round 1)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p2
# Feistel substitution on left word (round 2)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p3
# Feistel substitution on right word (round 3)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p4
# Feistel substitution on left word (round 4)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p5
# Feistel substitution on right word (round 5)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p6
# Feistel substitution on left word (round 6)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p7
# Feistel substitution on right word (round 7)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p8
# Feistel substitution on left word (round 8)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p9
# Feistel substitution on right word (round 9)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p10
# Feistel substitution on left word (round 10)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p11
# Feistel substitution on right word (round 11)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p12
# Feistel substitution on left word (round 12)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p13
# Feistel substitution on right word (round 13)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p14
# Feistel substitution on left word (round 14)
r ^= ((((S0[l >> 24] + S1[(l >> 16) & 0xff]) ^ S2[(l >> 8) & 0xff]) +
S3[l & 0xff]) & 0xffffffff) ^ p15
# Feistel substitution on right word (round 15)
l ^= ((((S0[r >> 24] + S1[(r >> 16) & 0xff]) ^ S2[(r >> 8) & 0xff]) +
S3[r & 0xff]) & 0xffffffff) ^ p16
box[j], box[j+1] = l, r = r ^ p17, l
j += 2
#===================================================================
# eoc
#===================================================================
#=============================================================================
# eof
#=============================================================================