def batchRun(self,
batchsize=1024,
random_key=True,
random_pt=True,
seed=None):
"""
Run multiple encryptions on random data
Args:
batchsize (int): The number of encryption to run (default 1024).
random_key (bool): True if the key is random (default False).
random_pt (bool): True if the plaintext are random (default True).
seed (int): random int32 for the PRG.
"""
if seed is None:
seed = random.randint(0, 2**32)
data = []
data.extend(
packuint32(1 | (random_key << 1) | (random_pt << 2)
| (batchsize << 16)))
data.extend(packuint32(seed))
self.sam3u_write(0, data)
# generate the inputs
if random_key:
key = [[0 for x in range(16)] for y in range(batchsize)]
else:
key = None
if random_pt:
pt = [[0 for x in range(16)] for y in range(batchsize)]
else:
pt = None
for b in range(batchsize):
if random_key:
for j in range(16):
key[b][15 - j] = seed >> 24
seed += ((seed * seed) & 0xffffffff) | 0x5
seed &= 0xffffffff
if random_pt:
for j in range(16):
pt[b][15 - j] = seed >> 24
seed += ((seed * seed) & 0xffffffff) | 0x5
seed &= 0xffffffff
return key, pt
def samples(self, numsamples):
nresp = packuint32(numsamples)
self.usb.sendCtrl(self.USB_SAMPLES, 0, nresp)
def repeat(self, width):
resp = self.usb.readCtrl(self.USB_GLITCH_SETTINGS, 0, 8)
nresp = resp[0:4]
nresp.extend(packuint32(width))
self.usb.sendCtrl(self.USB_GLITCH_SETTINGS, 0, nresp)
def ext_offset(self, offset):
resp = self.usb.readCtrl(self.USB_GLITCH_SETTINGS, 0, 8)
nresp = packuint32(offset)
nresp.extend(resp[4:8])
self.usb.sendCtrl(self.USB_GLITCH_SETTINGS, 0, nresp)
