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algo_sha256.py
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# SHA256 abstract
# http://en.wikipedia.org/wiki/SHA256
# Copyright © 2015 Aleksey Cherepanov <[email protected]>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted.
Var.setup('be', 4)
# Getting in
w = make_array('w', 64)
for i in range(0, 16):
t = input()
# print_var(t)
set_item(w, i, t)
# print_verbatim('input')
# for i in range(16):
# print_var(w[i])
# State, Getting in too
H_default = [0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19]
H = [new_state_var(v) for v in H_default]
# print_verbatim('state')
# map(print_var, H)
k = [
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
]
k = new_array('k', *[new_const(v) for v in k])
i = cycle_const_range('setupW', 16, 64 - 1, 1)
s0 = ror(w[i - 15], 7) ^ ror(w[i - 15], 18) ^ (w[i - 15] >> 3)
s1 = ror(w[i - 2], 17) ^ ror(w[i - 2], 19) ^ (w[i - 2] >> 10)
set_item(w, i, w[i - 16] + s0 + w[i - 7] + s1)
cycle_end('setupW')
a, b, c, d, e, f, g, h = [new_var() for i in range(8)]
a // H[0];
b // H[1];
c // H[2];
d // H[3];
e // H[4];
f // H[5];
g // H[6];
h // H[7];
# Main loop
i = cycle_const_range('main', 0, 63, 1)
# i = cycle_const_range('main', 0, 2, 1)
# print_verbatim('round')
# # print_var(i)
# map(print_var, [a, b, c, d, e, f, g, h])
s0 = ror(a, 2) ^ ror(a, 13) ^ ror(a, 22)
maj = (a & b) ^ (a & c) ^ (b & c)
t2 = s0 + maj
s1 = ror(e, 6) ^ ror(e, 11) ^ ror(e, 25)
ch = (e & f) ^ (~e & g)
t1 = h + s1 + ch + k[i] + w[i]
# t2 = k[i]
# # t1 = w[i]
# s1 = ror(e, 6) ^ ror(e, 11) ^ ror(e, 25)
# s2 = ror(a, 8) ^ ror(a, 19) ^ ror(a, 13)
# ch = (e & f) ^ (~e & g)
# maj = (a & b) ^ (a & c) ^ (b & c)
# t1 = h + s1 + s2 + ch + maj + k[i] + w[i]
h // g
g // f
f // e
e // (d + t1)
d // c
c // b
b // a
a // (t1 + t2)
# print_verbatim('round')
# map(print_var, [a, b, c, d, e, f, g, h])
# debug_exit('exit')
# End of main loop
cycle_end('main')
# a, b, c, d, e, f, g, h = H
# for i in range(64):
# s0 = ror(a, 2) ^ ror(a, 13) ^ ror(a, 22)
# maj = (a & b) ^ (a & c) ^ (b & c)
# t2 = s0 + maj
# s1 = ror(e, 6) ^ ror(e, 11) ^ ror(e, 25)
# ch = (e & f) ^ (~e & g)
# t1 = h + s1 + ch + k[i] + w[i]
# h = g
# g = f
# f = e
# e = (d + t1)
# d = c
# c = b
# b = a
# a = (t1 + t2)
# Updating state
H[0] += a
H[1] += b
H[2] += c
H[3] += d
H[4] += e
H[5] += f
H[6] += g
H[7] += h
# print_verbatim('end')
# print_verbatim('debug_end')
# map(print_var, H)
# Getting out
for v in H:
# v = swap_to_be(v)
# print_var(v)
output(v)