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encrypt.py
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encrypt.py
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from PIL import Image
from random import randint
import numpy
import sys
from rsa import encrypt
from helper import *
im = Image.open(sys.argv[1])
if(len(sys.argv) > 3):
key = int(sys.argv[3])
N = int(sys.argv[4])
pix = im.load()
#Obtaining the RGB matrices
r = []
g = []
b = []
for i in range(im.size[0]):
r.append([])
g.append([])
b.append([])
for j in range(im.size[1]):
rgbPerPixel = pix[i,j]
r[i].append(rgbPerPixel[0])
g[i].append(rgbPerPixel[1])
b[i].append(rgbPerPixel[2])
m = im.size[0]
n = im.size[1]
# Vectors Kr and Kc
alpha = 8
Kr = [randint(0,pow(2,alpha)-1) for i in range(m)]
Kc = [randint(0,pow(2,alpha)-1) for i in range(n)]
ITER_MAX = int(sys.argv[2])
# print('Vector Kr : ', Kr)
# print('Vector Kc : ', Kc)
f = open('keys.txt','w+')
# f.write('Vector Kr : \n')
for a in Kr:
f.write(str(a) + '\n' if len(sys.argv) == 3 else str(encrypt((key,N), a)) + '\n')
# f.write('Vector Kc : \n')
for a in Kc:
f.write(str(a) + '\n' if len(sys.argv) == 3 else str(encrypt((key,N), a)) + '\n')
# f.write('ITER_MAX : \n')
f.write(str(ITER_MAX) + '\n' if len(sys.argv) == 3 else str(encrypt((key,N), ITER_MAX)) + '\n')
for iterations in range(ITER_MAX):
# For each row
for i in range(m):
rTotalSum = sum(r[i])
gTotalSum = sum(g[i])
bTotalSum = sum(b[i])
rModulus = rTotalSum % 2
gModulus = gTotalSum % 2
bModulus = bTotalSum % 2
if(rModulus==0):
r[i] = numpy.roll(r[i],Kr[i])
else:
r[i] = numpy.roll(r[i],-Kr[i])
if(gModulus==0):
g[i] = numpy.roll(g[i],Kr[i])
else:
g[i] = numpy.roll(g[i],-Kr[i])
if(bModulus==0):
b[i] = numpy.roll(b[i],Kr[i])
else:
b[i] = numpy.roll(b[i],-Kr[i])
# For each column
for i in range(n):
rTotalSum = 0
gTotalSum = 0
bTotalSum = 0
for j in range(m):
rTotalSum += r[j][i]
gTotalSum += g[j][i]
bTotalSum += b[j][i]
rModulus = rTotalSum % 2
gModulus = gTotalSum % 2
bModulus = bTotalSum % 2
if(rModulus==0):
upshift(r,i,Kc[i])
else:
downshift(r,i,Kc[i])
if(gModulus==0):
upshift(g,i,Kc[i])
else:
downshift(g,i,Kc[i])
if(bModulus==0):
upshift(b,i,Kc[i])
else:
downshift(b,i,Kc[i])
# For each row
for i in range(m):
for j in range(n):
if(i%2==1):
r[i][j] = r[i][j] ^ Kc[j]
g[i][j] = g[i][j] ^ Kc[j]
b[i][j] = b[i][j] ^ Kc[j]
else:
r[i][j] = r[i][j] ^ rotate180(Kc[j])
g[i][j] = g[i][j] ^ rotate180(Kc[j])
b[i][j] = b[i][j] ^ rotate180(Kc[j])
# For each column
for j in range(n):
for i in range(m):
if(j%2==0):
r[i][j] = r[i][j] ^ Kr[i]
g[i][j] = g[i][j] ^ Kr[i]
b[i][j] = b[i][j] ^ Kr[i]
else:
r[i][j] = r[i][j] ^ rotate180(Kr[i])
g[i][j] = g[i][j] ^ rotate180(Kr[i])
b[i][j] = b[i][j] ^ rotate180(Kr[i])
for i in range(m):
for j in range(n):
pix[i,j] = (r[i][j],g[i][j],b[i][j])
path = sys.argv[1]
im.save('encrypted_images/' + path[path.rfind('/')+1:])
print("Done!")