/usr/lib/python3/dist-packages/passlib/crypto/scrypt/_gen_files.py is in python3-passlib 1.7.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | """passlib.utils.scrypt._gen_files - meta script that generates _salsa.py"""
#==========================================================================
# imports
#==========================================================================
# core
import os
# pkg
# local
#==========================================================================
# constants
#==========================================================================
_SALSA_OPS = [
# row = (target idx, source idx 1, source idx 2, rotate)
# interpreted as salsa operation over uint32...
# target = (source1+source2)<<rotate
##/* Operate on columns. */
##define R(a,b) (((a) << (b)) | ((a) >> (32 - (b))))
##x[ 4] ^= R(x[ 0]+x[12], 7); x[ 8] ^= R(x[ 4]+x[ 0], 9);
##x[12] ^= R(x[ 8]+x[ 4],13); x[ 0] ^= R(x[12]+x[ 8],18);
( 4, 0, 12, 7),
( 8, 4, 0, 9),
( 12, 8, 4, 13),
( 0, 12, 8, 18),
##x[ 9] ^= R(x[ 5]+x[ 1], 7); x[13] ^= R(x[ 9]+x[ 5], 9);
##x[ 1] ^= R(x[13]+x[ 9],13); x[ 5] ^= R(x[ 1]+x[13],18);
( 9, 5, 1, 7),
( 13, 9, 5, 9),
( 1, 13, 9, 13),
( 5, 1, 13, 18),
##x[14] ^= R(x[10]+x[ 6], 7); x[ 2] ^= R(x[14]+x[10], 9);
##x[ 6] ^= R(x[ 2]+x[14],13); x[10] ^= R(x[ 6]+x[ 2],18);
( 14, 10, 6, 7),
( 2, 14, 10, 9),
( 6, 2, 14, 13),
( 10, 6, 2, 18),
##x[ 3] ^= R(x[15]+x[11], 7); x[ 7] ^= R(x[ 3]+x[15], 9);
##x[11] ^= R(x[ 7]+x[ 3],13); x[15] ^= R(x[11]+x[ 7],18);
( 3, 15, 11, 7),
( 7, 3, 15, 9),
( 11, 7, 3, 13),
( 15, 11, 7, 18),
##/* Operate on rows. */
##x[ 1] ^= R(x[ 0]+x[ 3], 7); x[ 2] ^= R(x[ 1]+x[ 0], 9);
##x[ 3] ^= R(x[ 2]+x[ 1],13); x[ 0] ^= R(x[ 3]+x[ 2],18);
( 1, 0, 3, 7),
( 2, 1, 0, 9),
( 3, 2, 1, 13),
( 0, 3, 2, 18),
##x[ 6] ^= R(x[ 5]+x[ 4], 7); x[ 7] ^= R(x[ 6]+x[ 5], 9);
##x[ 4] ^= R(x[ 7]+x[ 6],13); x[ 5] ^= R(x[ 4]+x[ 7],18);
( 6, 5, 4, 7),
( 7, 6, 5, 9),
( 4, 7, 6, 13),
( 5, 4, 7, 18),
##x[11] ^= R(x[10]+x[ 9], 7); x[ 8] ^= R(x[11]+x[10], 9);
##x[ 9] ^= R(x[ 8]+x[11],13); x[10] ^= R(x[ 9]+x[ 8],18);
( 11, 10, 9, 7),
( 8, 11, 10, 9),
( 9, 8, 11, 13),
( 10, 9, 8, 18),
##x[12] ^= R(x[15]+x[14], 7); x[13] ^= R(x[12]+x[15], 9);
##x[14] ^= R(x[13]+x[12],13); x[15] ^= R(x[14]+x[13],18);
( 12, 15, 14, 7),
( 13, 12, 15, 9),
( 14, 13, 12, 13),
( 15, 14, 13, 18),
]
def main():
target = os.path.join(os.path.dirname(__file__), "_salsa.py")
fh = file(target, "w")
write = fh.write
VNAMES = ["v%d" % i for i in range(16)]
PAD = " " * 4
PAD2 = " " * 8
PAD3 = " " * 12
TLIST = ", ".join("b%d" % i for i in range(16))
VLIST = ", ".join(VNAMES)
kwds = dict(
VLIST=VLIST,
TLIST=TLIST,
)
write('''\
"""passlib.utils.scrypt._salsa - salsa 20/8 core, autogenerated by _gen_salsa.py"""
#=================================================================
# salsa function
#=================================================================
def salsa20(input):
\"""apply the salsa20/8 core to the provided input
:args input: input list containing 16 32-bit integers
:returns: result list containing 16 32-bit integers
\"""
%(TLIST)s = input
%(VLIST)s = \\
%(TLIST)s
i = 0
while i < 4:
''' % kwds)
for idx, (target, source1, source2, rotate) in enumerate(_SALSA_OPS):
write('''\
# salsa op %(idx)d: [%(it)d] ^= ([%(is1)d]+[%(is2)d])<<<%(rot1)d
t = (%(src1)s + %(src2)s) & 0xffffffff
%(dst)s ^= ((t & 0x%(rmask)08x) << %(rot1)d) | (t >> %(rot2)d)
''' % dict(
idx=idx, is1 = source1, is2=source2, it=target,
src1=VNAMES[source1],
src2=VNAMES[source2],
dst=VNAMES[target],
rmask=(1<<(32-rotate))-1,
rot1=rotate,
rot2=32-rotate,
))
write('''\
i += 1
''')
for idx in range(16):
write(PAD + "b%d = (b%d + v%d) & 0xffffffff\n" % (idx,idx,idx))
write('''\
return %(TLIST)s
#=================================================================
# eof
#=================================================================
''' % kwds)
if __name__ == "__main__":
main()
#==========================================================================
# eof
#==========================================================================
|