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aes.py
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aes.py
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import os, sys, unittest, binascii
import pycuda.driver as cuda
import pycuda.autoinit
from pycuda.compiler import SourceModule
import numpy
import array, time, math, numpy
class AES:
sbox = (99,124,119,123,242,107,111,197,48,1,103,43,254,215,171,
118,202,130,201,125,250,89,71,240,173,212,162,175,156,164,114,192,183,253,
147,38,54,63,247,204,52,165,229,241,113,216,49,21,4,199,35,195,24,150,5,154,
7,18,128,226,235,39,178,117,9,131,44,26,27,110,90,160,82,59,214,179,41,227,
47,132,83,209,0,237,32,252,177,91,106,203,190,57,74,76,88,207,208,239,170,
251,67,77,51,133,69,249,2,127,80,60,159,168,81,163,64,143,146,157,56,245,
188,182,218,33,16,255,243,210,205,12,19,236,95,151,68,23,196,167,126,61,
100,93,25,115,96,129,79,220,34,42,144,136,70,238,184,20,222,94,11,219,224,
50,58,10,73,6,36,92,194,211,172,98,145,149,228,121,231,200,55,109,141,213,
78,169,108,86,244,234,101,122,174,8,186,120,37,46,28,166,180,198,232,221,
116,31,75,189,139,138,112,62,181,102,72,3,246,14,97,53,87,185,134,193,29,
158,225,248,152,17,105,217,142,148,155,30,135,233,206,85,40,223,140,161,
137,13,191,230,66,104,65,153,45,15,176,84,187,22)
cuda_inited = False
threadMax = 1024
blockMax = 1024
cuda_buf_size = 16 * blockMax * threadMax
def __init__(self, key, threadMax = 1024, blockMax = 1024):
self.key = key
self.threadMax = threadMax
self.blockMax = blockMax
self.expandKey()
self.gen_tbox()
def gen_tbox(self):
self.Te = [numpy.zeros(256, numpy.uint32) for i in xrange(4)]
d = bytearray(256)
for i in xrange(128):
d[i] = i << 1;
d[128 + i] = (i << 1) ^ 0x1b;
for i in xrange(256):
self.Te[0][i] = self.tuple2word((d[self.sbox[i]], self.sbox[i], self.sbox[i], d[self.sbox[i]] ^ self.sbox[i]))
self.Te[1][i] = self.tuple2word((d[self.sbox[i]] ^ self.sbox[i], d[self.sbox[i]], self.sbox[i], self.sbox[i]))
self.Te[2][i] = self.tuple2word((self.sbox[i], d[self.sbox[i]] ^ self.sbox[i], d[self.sbox[i]], self.sbox[i]))
self.Te[3][i] = self.tuple2word((self.sbox[i], self.sbox[i], d[self.sbox[i]] ^ self.sbox[i], d[self.sbox[i]]))
def tuple2word(self, x):
return (x[0] << 24) | (x[1] << 16) | (x[2] << 8) | x[3]
def byte2word(self, bArr):
return (bArr[0] << 24) | (bArr[1] << 16) | (bArr[2] << 8) | bArr[3]
def word2byte(self, w):
b = bytearray(4)
b[0] = w >> 24
b[1] = (w >> 16) & 0xff
b[2] = (w >> 8) & 0xff
b[3] = w & 0xff
return b
def expandKey(self):
if not self.key or len(self.key) not in (16, 16):
raise Exception("invalid key")
ks = bytearray((len(self.key) / 4 + 7) * 16)
ks[0 : 16] = self.key
self.keySchedule = numpy.zeros(4 * (len(self.key) / 4 + 7), numpy.uint32)
rcon = 1
for i in xrange(len(self.key), len(ks), 4):
temp = ks[i - 4 : i]
if i % len(self.key) == 0:
temp = (self.sbox[temp[1]] ^ rcon, self.sbox[temp[2]], self.sbox[temp[3]], self.sbox[temp[0]])
rcon = rcon << 1
if rcon >= 256:
rcon ^= 0x11b;
for j in xrange(0, 4):
ks[i + j] = ks[i + j - len(self.key)] ^ temp[j]
for i in xrange(len(ks) / 16):
self.keySchedule[i * 4 : (i + 1) * 4] = (self.byte2word(ks[i * 16 : i * 16 + 4]), self.byte2word(ks[i * 16 + 4 : i * 16 + 8]), self.byte2word(ks[i * 16 + 8 : i * 16 + 12]), self.byte2word(ks[i * 16 + 12 : i * 16 + 16]))
def printKeySchedule(self):
for i in xrange(0, len(self.keySchedule)):
line = "(%08x, %08x, %08x, %08x)" % (self.keySchedule[i][0], self.keySchedule[i][1], self.keySchedule[i][2], self.keySchedule[i][3])
print line
def printDebugInfo(self):
print self.Te
def __addRoundKey(self, dst, src):
for i in xrange(len(dst)):
dst[i] ^= src[i]
def __block_encrypt(self, pt):
s = [0] * 4
rk = self.keySchedule[0 : 4]
for i in xrange(4):
s[i] = self.byte2word(pt[i * 4 : (i + 1) * 4])
# add round key
s[i] ^= rk[i]
t = [0] * 4
for i in xrange(1, 10):
rk = self.keySchedule[i * 4 : (i + 1) * 4]
t[0] = self.Te[0][s[0] >> 24] ^ self.Te[1][(s[1] >> 16) & 0xff] ^ self.Te[2][(s[2] >> 8 ) & 0xff] ^ self.Te[3][(s[3]) & 0xff] ^ rk[0]
t[1] = self.Te[0][s[1] >> 24] ^ self.Te[1][(s[2] >> 16) & 0xff] ^ self.Te[2][(s[3] >> 8 ) & 0xff] ^ self.Te[3][(s[0]) & 0xff] ^ rk[1]
t[2] = self.Te[0][s[2] >> 24] ^ self.Te[1][(s[3] >> 16) & 0xff] ^ self.Te[2][(s[0] >> 8 ) & 0xff] ^ self.Te[3][(s[1]) & 0xff] ^ rk[2]
t[3] = self.Te[0][s[3] >> 24] ^ self.Te[1][(s[0] >> 16) & 0xff] ^ self.Te[2][(s[1] >> 8 ) & 0xff] ^ self.Te[3][(s[2]) & 0xff] ^ rk[3]
for j in xrange(4):
s[j] = t[j]
rk = self.keySchedule[40 : 44]
s[0] = (self.Te[2][(t[0] >> 24)] & 0xff000000) ^ (self.Te[3][(t[1] >> 16) & 0xff] & 0x00ff0000) ^ (self.Te[0][(t[2] >> 8) & 0xff] & 0x0000ff00) ^ (self.Te[1][t[3] & 0xff] & 0x000000ff) ^ rk[0]
s[1] = (self.Te[2][(t[1] >> 24)] & 0xff000000) ^ (self.Te[3][(t[2] >> 16) & 0xff] & 0x00ff0000) ^ (self.Te[0][(t[3] >> 8) & 0xff] & 0x0000ff00) ^ (self.Te[1][t[0] & 0xff] & 0x000000ff) ^ rk[1]
s[2] = (self.Te[2][(t[2] >> 24)] & 0xff000000) ^ (self.Te[3][(t[3] >> 16) & 0xff] & 0x00ff0000) ^ (self.Te[0][(t[0] >> 8) & 0xff] & 0x0000ff00) ^ (self.Te[1][t[1] & 0xff] & 0x000000ff) ^ rk[2]
s[3] = (self.Te[2][(t[3] >> 24)] & 0xff000000) ^ (self.Te[3][(t[0] >> 16) & 0xff] & 0x00ff0000) ^ (self.Te[0][(t[1] >> 8) & 0xff] & 0x0000ff00) ^ (self.Te[1][t[2] & 0xff] & 0x000000ff) ^ rk[3]
ct = bytearray(len(pt))
for i in range(4):
ct[i * 4 : (i + 1) * 4] = self.word2byte(s[i])
return ct
def basic_encrypt(self, pt):
if len(pt) % 16 != 0:
raise Exception("invalid block size: " + str(len(pt)))
if not isinstance(pt, bytearray):
if isinstance(pt, str):
pt = bytearray(pt)
ct = bytearray(len(pt))
for i in xrange(0, len(pt), 16):
ct[i : i + 16] = self.__block_encrypt(pt[i : i + 16])
return ct
def init_cuda(self):
if self.cuda_inited:
return
cuda_kernel = """
#include <stdio.h>
__device__ __constant__ unsigned int keySchedule[44];
__device__ __constant__ unsigned int Te0[256];
__device__ __constant__ unsigned int Te1[256];
__device__ __constant__ unsigned int Te2[256];
__device__ __constant__ unsigned int Te3[256];
__device__ __constant__ unsigned int length;
__device__ __constant__ unsigned int threadMax;
__global__ void printKeySchedule(){
for(int i = 0; i < 11; i++){
for(int j = 0; j < 4; j++){
printf("%08x", keySchedule[i * 4 + j]);
}
printf("\\n");
}
}
__device__ unsigned int bytestoword(unsigned char* b){
return (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | b[3];
}
__device__ void wordtobytes(unsigned char* b, unsigned int w){
b[0] = (w >> 24);
b[1] = (w >> 16) & 0xff;
b[2] = (w >> 8) & 0xff;
b[3] = w & 0xff;
}
__device__ void addRoundKey(unsigned int *s, unsigned int *k){
s[0] ^= k[0];
s[1] ^= k[1];
s[2] ^= k[2];
s[3] ^= k[3];
}
__global__ void encrypt(unsigned char* in){
int p = blockIdx.x * 1024 + threadIdx.x;
if(p * 16 >= length)
return;
unsigned char* block = in + p * 16;
unsigned int s[4], t[4];
unsigned int *rk;
s[0] = bytestoword(block);
s[1] = bytestoword(block + 4);
s[2] = bytestoword(block + 8);
s[3] = bytestoword(block + 12);
addRoundKey(s, keySchedule);
for(int i = 1; i < 10; i++){
rk = keySchedule + i * 4;
t[0] = Te0[s[0] >> 24] ^ Te1[(s[1] >> 16) & 0xff] ^ Te2[(s[2] >> 8 ) & 0xff] ^ Te3[(s[3]) & 0xff] ^ rk[0];
t[1] = Te0[s[1] >> 24] ^ Te1[(s[2] >> 16) & 0xff] ^ Te2[(s[3] >> 8 ) & 0xff] ^ Te3[(s[0]) & 0xff] ^ rk[1];
t[2] = Te0[s[2] >> 24] ^ Te1[(s[3] >> 16) & 0xff] ^ Te2[(s[0] >> 8 ) & 0xff] ^ Te3[(s[1]) & 0xff] ^ rk[2];
t[3] = Te0[s[3] >> 24] ^ Te1[(s[0] >> 16) & 0xff] ^ Te2[(s[1] >> 8 ) & 0xff] ^ Te3[(s[2]) & 0xff] ^ rk[3];
for(int j = 0; j < 4; j++)
s[j] = t[j];
}
rk = keySchedule + 4 * 10;
s[0] = (Te2[(t[0] >> 24)] & 0xff000000) ^ (Te3[(t[1] >> 16) & 0xff] & 0x00ff0000) ^ (Te0[(t[2] >> 8) & 0xff] & 0x0000ff00) ^ (Te1[t[3] & 0xff] & 0x000000ff) ^ rk[0];
s[1] = (Te2[(t[1] >> 24)] & 0xff000000) ^ (Te3[(t[2] >> 16) & 0xff] & 0x00ff0000) ^ (Te0[(t[3] >> 8) & 0xff] & 0x0000ff00) ^ (Te1[t[0] & 0xff] & 0x000000ff) ^ rk[1];
s[2] = (Te2[(t[2] >> 24)] & 0xff000000) ^ (Te3[(t[3] >> 16) & 0xff] & 0x00ff0000) ^ (Te0[(t[0] >> 8) & 0xff] & 0x0000ff00) ^ (Te1[t[1] & 0xff] & 0x000000ff) ^ rk[2];
s[3] = (Te2[(t[3] >> 24)] & 0xff000000) ^ (Te3[(t[0] >> 16) & 0xff] & 0x00ff0000) ^ (Te0[(t[1] >> 8) & 0xff] & 0x0000ff00) ^ (Te1[t[2] & 0xff] & 0x000000ff) ^ rk[3];
wordtobytes(block, s[0]);
wordtobytes(block + 4, s[1]);
wordtobytes(block + 8, s[2]);
wordtobytes(block + 12, s[3]);
}
"""
mod = SourceModule(cuda_kernel)
dKeySchedule = mod.get_global("keySchedule")[0]
cuda.memcpy_htod(dKeySchedule, self.keySchedule)
dThreadMax = mod.get_global("threadMax")[0]
cuda.memcpy_htod(dThreadMax, numpy.array([self.threadMax], numpy.uint32))
self.dLength = mod.get_global('length')[0]
dTe0 = mod.get_global("Te0")[0]
cuda.memcpy_htod(dTe0, self.Te[0])
dTe1 = mod.get_global("Te1")[0]
cuda.memcpy_htod(dTe1, self.Te[1])
dTe2 = mod.get_global("Te2")[0]
cuda.memcpy_htod(dTe2, self.Te[2])
dTe3 = mod.get_global("Te3")[0]
cuda.memcpy_htod(dTe3, self.Te[3])
self.mod = mod
self.cuda_buf = cuda.mem_alloc(self.cuda_buf_size)
self.batchMax = self.threadMax * self.blockMax * 16
self.cuda_inited = True
def cuda_encrypt(self, pt):
if len(pt) <= 0 or len(pt) % 16 != 0:
raise Exception("invalid block size: " + str(len(pt)))
if isinstance(pt, str):
pass
elif isinstance(pt, bytearray):
pass
else:
raise Exception("invalid input type: " + type(pt))
self.init_cuda()
# printKS = self.mod.get_function("printKeySchedule")
# printKS(block = (1, 1, 1))
enc = self.mod.get_function("encrypt");
ct = numpy.empty(len(pt), dtype = numpy.ubyte)
start = 0
remain = len(pt)
while remain > 0:
threadNum = self.blockMax
blockNum = 1
if remain >= self.batchMax:
dispose = self.batchMax
blockNum = self.blockMax
threadNum = self.threadMax
elif remain > self.blockMax * 16:
blockNum = int(math.ceil(float(remain / 16) / self.threadMax))
threadm = self.threadMax
dispose = remain
else:
threadNum = remain / 16
dispose = remain
remain -= dispose
cuda.memcpy_htod(self.cuda_buf, pt[start : start + dispose])
cuda.memcpy_htod(self.dLength, numpy.array([dispose], numpy.uint32))
enc(self.cuda_buf, block = (threadNum, 1, 1), grid = (blockNum, 1))
cuda.memcpy_dtoh(ct[start : start + dispose], self.cuda_buf)
start += dispose
return ct
class TestCUDAAES(unittest.TestCase):
def setUp(self):
pass
def tearDown(self):
pass
def _test_debuginfo(self):
aes = AES('abcdefghijklmnop')
aes.printKeySchedule()
def test_basic_encrypt(self):
key = bytearray(16)
for i in xrange(16):
key[i] = i
rslt = (210,83,99,252,114,19,55,100,138,104,243,74,190,243,180,5)
aes = AES(key)
# aes.printKeySchedule()
# print binascii.hexlify(key)
pt = 'abcdefghijklmnop'
# print binascii.hexlify(pt)
ct = aes.basic_encrypt(pt)
# print binascii.hexlify(ct)
for i in xrange(len(rslt)):
self.assertEqual(rslt[i], ct[i])
def test_cuda_encrypt(self):
key = bytearray(16)
for i in xrange(16):
key[i] = i
rslt = (210,83,99,252,114,19,55,100,138,104,243,74,190,243,180,5)
aes = AES(key)
pt = 'abcdefghijklmnop'
# print binascii.hexlify(pt)
ct = aes.cuda_encrypt(pt)
# print binascii.hexlify(ct)
for i in xrange(len(rslt)):
self.assertEqual(rslt[i], ct[i])
def test_compare(self):
key = bytearray(16)
for i in xrange(16):
key[i] = i
aes = AES(key, 4)
bs = 1024
pt = numpy.random.bytes(bs)
ct1 = aes.basic_encrypt(pt)
ct2 = aes.cuda_encrypt(pt)
for i in xrange(len(pt)):
self.assertEqual(ct1[i], ct2[i])
def test_benchmark(self):
key = numpy.random.bytes(16)
aes = AES(key)
for i in xrange(17):
bs = 16 * pow(2, i)
print "block size: %d" % bs
# pt = 'abcdefghijklmnop' * (bs / 16)
pt = numpy.random.bytes(bs)
s = time.clock()
# aes.basic_encrypt(pt)
e = time.clock()
print "basic: %f" % (e - s)
s = time.clock()
aes.cuda_encrypt(pt)
e = time.clock()
print "cuda: %f" % (e - s)
if __name__ == "__main__":
unittest.main()