def test_DES_encrypt():
key = '0123456789ABCDEF'
msg = '789AB123456789AA'
expect = 'e7ab74f51fb2e8a4'
result = DES.DES_encrypt(msg, key)
assert expect == result, 'DES encrypt failed'
key = '789ABCDEF0123456'
msg = '45AB1A89678923A7'
expect = '64b8696dfcbdda2f'
result = DES.DES_encrypt(msg, key)
assert expect == result, 'DES encrypt failed'
def encrypt_image():
# Convert image to RGB and generate a new encrypted image
RGB = IMAGE.convert('RGB')
IMAGE_ENCRYPT = Image.new('RGB', (IMAGE.size[0], IMAGE.size[1]), 0)
pixels_encrypt = IMAGE_ENCRYPT.load()
# Variables to print loading
percentage = "0.0%"
count = 0
percentage_increment = 0
# Go trhough matrix to encrypt pixel by pixel
for line in range(IMAGE.size[0]):
for pixel in range(IMAGE.size[1]):
# Get pixel RGB and padding with '0123456789ABCEEF'
red, green, blue = RGB.getpixel((line, pixel))
clean_text = str(red)+ str(green) + str(blue) + '0123456789ABCEEF'
# Run DES and generate obfuscated text
encrypt = DES.DES_encrypt(clean_text, KEY, ROUNDS, ZERO_KEY)
# Get RGB without padding from obfuscated text
red_encrypt = int(encrypt[56:64], 2)
green_encrypt = int(encrypt[47:55], 2)
blue_encrypt = int(encrypt[38:46], 2)
# Merge all encrypted pixels to generate encrypted image
pixels_encrypt[line, pixel] = (red_encrypt, green_encrypt, blue_encrypt, 255)
# Print loading
print_percentage(count, percentage, 0)
print_percentage(count, percentage, 175)
print_percentage(count, percentage, 350)
if (round((100 * count) / (512 * 512), 2) == round(percentage_increment, 2)):
percentage = str(round((100 * count) / (512 * 512), 2)) + "%"
percentage_increment += 0.2
count += 1
# Print complete when image is encrypted
os.system("clear")
print ("Complete [100%]")
# Save encrypted image whit distinct names
if ZERO_KEY:
IMAGE_ENCRYPT.save("image_DES_with_zero_key.png", "PNG")
elif (ROUNDS == 16):
IMAGE_ENCRYPT.save("image_DES.png", "PNG")
elif (ROUNDS == 0):
IMAGE_ENCRYPT.save("image_DES_without_iteration.png", "PNG")
elif (ROUNDS == 1):
IMAGE_ENCRYPT.save("image_DES_with_one_iteration.png", "PNG")
else:
IMAGE_ENCRYPT.save("encrypted_image.png", "PNG")
