def test_function(self):
# Test all possible inputs up to 4 bits.
for size in xrange(2, 5):
space = [[0, 1] for _ in xrange(0, size)]
for output in itertools.product(*space):
for shift in xrange(0, 2 * size):
c = sources.digital_source_circuit(output)
# It's the same algorithm as the code being tested...
shifted = output[shift % size:] + output[:shift % size]
shifted = list(shifted)
# Also make sure it's not in place
result = shifters.left_rotate(c, shift)
self.assertIsNot(c, result)
self.assertEqual(shifted, result.evaluate())
def create_words(chunk, rounds=80):
w = [None] * rounds
for i in xrange(0, min(rounds, 16)):
w[i] = (chunk, xrange(i * 32, i * 32 + 32))
for i in xrange(16, min(rounds, 80)):
# w[i] = (w[i-3] xor w[i-8] xor w[i-14] xor w[i-16]) leftrotate 1
xtemp = bitwise_xor_circuit(32)
connect_circuits(w[i - 3][0], xtemp, {
x: y for (x, y) in izip(w[i - 3][1], xrange(0, 32))
})
connect_circuits(w[i - 8][0], xtemp, {
x: y for (x, y) in izip(w[i - 8][1], xrange(32, 64))
})
# result xor w[i - 14]
xtemp2 = bitwise_xor_circuit(32)
connect_circuits(xtemp, xtemp2, {x: x for x in xrange(0, 32)})
connect_circuits(w[i - 14][0], xtemp2, {
x: y for (x, y) in izip(w[i - 14][1], xrange(32, 64))
})
# result xor w[i - 16]
xtemp = bitwise_xor_circuit(32)
connect_circuits(xtemp2, xtemp, {x: x for x in xrange(0, 32)})
connect_circuits(w[i - 16][0], xtemp, {
x: y for (x, y) in izip(w[i - 16][1], xrange(32, 64))
})
# leftrotate 1
word = left_rotate(xtemp, 1)
w[i] = (word, xrange(0, 32))
return w
def block_operation(chunk, h0, h1, h2, h3, h4, rounds=80):
"""
Returns (h0, h1, h2, h3, h4), the h-constants that result from running
the SHA-1 algorithm on one block.
"""
a, b, c, d, e = h0, h1, h2, h3, h4
w = create_words(chunk, rounds)
# Main loop here
for i in xrange(0, rounds):
if 0 <= i <= 19:
# f = (b and c) or ((not b) and d)
b_and_c = bitwise_and_circuit(32)
connect_circuits(b, b_and_c, {x: x for x in xrange(0, 32)})
connect_circuits(c, b_and_c, {x: x + 32 for x in xrange(0, 32)})
not_b = bitwise_not_circuit(32)
connect_circuits(b, not_b, {x: x for x in xrange(0, 32)})
not_b_and_d = bitwise_and_circuit(32)
connect_circuits(not_b, not_b_and_d, {x: x for x in xrange(0, 32)})
connect_circuits(d, not_b_and_d, {x: x + 32 for x in xrange(0, 32)})
f = bitwise_or_circuit(32)
connect_circuits(b_and_c, f, {x: x for x in xrange(0, 32)})
connect_circuits(not_b_and_d, f, {x: x + 32 for x in xrange(0, 32)})
k = digital_source_int_circuit(0x5A827999, 32)
elif 20 <= i <= 39:
# f = b xor c xor d
b_xor_c = bitwise_xor_circuit(32)
connect_circuits(b, b_xor_c, {x: x for x in xrange(0, 32)})
connect_circuits(c, b_xor_c, {x: x + 32 for x in xrange(0, 32)})
f = bitwise_xor_circuit(32)
connect_circuits(b_xor_c, f, {x: x for x in xrange(0, 32)})
connect_circuits(d, f, {x: x + 32 for x in xrange(0, 32)})
k = digital_source_int_circuit(0x6ED9EBA1, 32)
elif 40 <= i <= 59:
# f = (b and c) or (b and d) or (c and d)
b_and_c = bitwise_and_circuit(32)
connect_circuits(b, b_and_c, {x: x for x in xrange(0, 32)})
connect_circuits(c, b_and_c, {x: x + 32 for x in xrange(0, 32)})
b_and_d = bitwise_and_circuit(32)
connect_circuits(b, b_and_d, {x: x for x in xrange(0, 32)})
connect_circuits(d, b_and_d, {x: x + 32 for x in xrange(0, 32)})
c_and_d = bitwise_and_circuit(32)
connect_circuits(c, c_and_d, {x: x for x in xrange(0, 32)})
connect_circuits(d, c_and_d, {x: x + 32 for x in xrange(0, 32)})
bnc_or_bnd = bitwise_or_circuit(32)
connect_circuits(b_and_c, bnc_or_bnd, {x: x for x in xrange(0, 32)})
connect_circuits(b_and_d, bnc_or_bnd, {x: x + 32 for x in xrange(0, 32)})
f = bitwise_or_circuit(32)
connect_circuits(bnc_or_bnd, f, {x: x for x in xrange(0, 32)})
connect_circuits(c_and_d, f, {x: x + 32 for x in xrange(0, 32)})
k = digital_source_int_circuit(0x8F1BBCDC, 32)
elif 60 <= i <= 79:
# f = b xor c xor d
b_xor_c = bitwise_xor_circuit(32)
connect_circuits(b, b_xor_c, {x: x for x in xrange(0, 32)})
connect_circuits(c, b_xor_c, {x: x + 32 for x in xrange(0, 32)})
f = bitwise_xor_circuit(32)
connect_circuits(b_xor_c, f, {x: x for x in xrange(0, 32)})
connect_circuits(d, f, {x: x + 32 for x in xrange(0, 32)})
k = digital_source_int_circuit(0xCA62C1D6, 32)
else:
raise Exception("Invalid word index in main loop!")
# (a leftrotate 5) + f
temp = ripple_adder_no_carry(32)
connect_circuits(a, temp, {x: x - 5 for x in xrange(5, 32)})
connect_circuits(a, temp, {x: x + 27 for x in xrange(0, 5)})
connect_circuits(f, temp, {x: x + 32 for x in xrange(0, 32)})
# result + e
temp2 = ripple_adder_no_carry(32)
connect_circuits(temp, temp2, {x: x for x in xrange(0, 32)})
connect_circuits(e, temp2, {x: x + 32 for x in xrange(0, 32)})
# result + k
temp = ripple_adder_no_carry(32)
connect_circuits(temp2, temp, {x: x for x in xrange(0, 32)})
connect_circuits(k, temp, {x: x + 32 for x in xrange(0, 32)})
# result + w[i]
temp2 = ripple_adder_no_carry(32)
connect_circuits(temp, temp2, {x: x for x in xrange(0, 32)})
connect_circuits(w[i][0], temp2, {x: y for (x, y) in izip(w[i][1], xrange(32, 64))})
# temp = (a leftrotate 5) + f + e + k + w[i]
temp = temp2
e = d
d = c
c = left_rotate(b, 30)
b = a
a = temp
h0_add = ripple_adder_no_carry(32)
connect_circuits(h0, h0_add, {i: i for i in xrange(0, 32)})
connect_circuits(a, h0_add, {i: i + 32 for i in xrange(0, 32)})
h1_add = ripple_adder_no_carry(32)
connect_circuits(h1, h1_add, {i: i for i in xrange(0, 32)})
connect_circuits(b, h1_add, {i: i + 32 for i in xrange(0, 32)})
h2_add = ripple_adder_no_carry(32)
connect_circuits(h2, h2_add, {i: i for i in xrange(0, 32)})
connect_circuits(c, h2_add, {i: i + 32 for i in xrange(0, 32)})
h3_add = ripple_adder_no_carry(32)
connect_circuits(h3, h3_add, {i: i for i in xrange(0, 32)})
connect_circuits(d, h3_add, {i: i + 32 for i in xrange(0, 32)})
h4_add = ripple_adder_no_carry(32)
connect_circuits(h4, h4_add, {i: i for i in xrange(0, 32)})
connect_circuits(e, h4_add, {i: i + 32 for i in xrange(0, 32)})
return h0_add, h1_add, h2_add, h3_add, h4_add