def main(argv):
if len(argv) > 2:
die("Too many arguments.", show_usage=True)
try:
opts, args = getopt.getopt(argv, "h", ["help"])
except getopt.GetoptError:
usage()
sys.exit(2)
for opt in opts:
if opt in ("-h", "--help"):
usage()
sys.exit()
key = False
source = False
destination = False
if len(args) > 0:
source = args[0]
if len(args) > 1:
destination = args[1]
else:
usage()
sys.exit()
while not key:
k = raw_input(
"Enter the key to use for encryption. If you do not enter a key, one will be chosen for you at random: "
)
if k == '':
key = None
break
try:
k = int(k)
except ValueError:
print "Invalid input (enter an integer between 0 and 25)"
continue
if (0 <= int(k) <= 25):
key = int(k)
else:
print "Invalid input (enter an integer between 0 and 25)"
plain = load_file(source)
if not plain:
plain = source
if plain:
cipher = caesar.encipher(plain, key)
else:
die("Could not determine source.")
if not cipher:
die("Could not encipher.")
if destination:
save_to_file(destination, cipher)
else:
print cipher
def test_1():
"""Test every three-character-long combination of printables for every 4th key. Return True if success, False if failure.
"""
for word in [a + b + c for a in string.printable for b in string.printable for c in string.printable]:
for i in range(0, 26, 4):
if caesar.decipher(caesar.encipher(word, i), i) != word:
print "TEST 1 FAILED"
return False
print "TEST 1 SUCCEEDED"
return True
def main(argv):
if len(argv) > 2:
die("Too many arguments.", show_usage=True)
try:
opts, args = getopt.getopt(argv, "h", ["help"])
except getopt.GetoptError:
usage()
sys.exit(2)
for opt in opts:
if opt in ("-h", "--help"):
usage()
sys.exit()
key = False
source = False
destination = False
if len(args) > 0:
source = args[0]
if len(args) > 1:
destination = args[1]
else:
usage()
sys.exit()
while not key:
k = raw_input("Enter the key to use for encryption. If you do not enter a key, one will be chosen for you at random: ")
if k == '':
key = None
break
try:
k = int(k)
except ValueError:
print "Invalid input (enter an integer between 0 and 25)"
continue
if (0 <= int(k) <= 25):
key = int(k)
else:
print "Invalid input (enter an integer between 0 and 25)"
plain = load_file(source)
if not plain:
plain = source
if plain:
cipher = caesar.encipher(plain, key)
else:
die("Could not determine source.")
if not cipher:
die("Could not encipher.")
if destination:
save_to_file(destination, cipher)
else:
print cipher
def test_3():
"""Test random key encipherment, and unknown key decipherment."""
words = caesar.get_words()
random.shuffle(words)
plain = ''
for i in range(100):
plain += words[i]
plain += ' '
if caesar.decipher(caesar.encipher(plain)) != plain:
print "TEST 3 FAILED"
return False
print "TEST 3 SUCCEEDED"
return True
def test_3():
"""Test random key encipherment, and unknown key decipherment."""
words = caesar.get_words()
random.shuffle(words)
plain = ""
for i in range(100):
plain += words[i]
plain += " "
if caesar.decipher(caesar.encipher(plain)) != plain:
print "TEST 3 FAILED"
return False
print "TEST 3 SUCCEEDED"
return True
def test_1():
"""Test every three-character-long combination of printables for every 4th key. Return True if success, False if failure.
"""
for word in [
a + b + c for a in string.printable for b in string.printable
for c in string.printable
]:
for i in range(0, 26, 4):
if caesar.decipher(caesar.encipher(word, i), i) != word:
print "TEST 1 FAILED"
return False
print "TEST 1 SUCCEEDED"
return True
def test_2():
"""Test a long random string. Return True if success, False if failure."""
long_string = ''
numbers = range(100)
random.shuffle(numbers)
j = 0
for i in range(100001):
if j == 99:
random.shuffle(numbers)
j = 0
long_string += string.printable[numbers[0]]
j += 1
for i in range(26):
if caesar.decipher(caesar.encipher(long_string, i), i) == long_string:
print "TEST 2 SUCCEEDED"
return True
print "TEST 2 FAILED"
return False
def test_2():
"""Test a long random string. Return True if success, False if failure."""
long_string = ""
numbers = range(100)
random.shuffle(numbers)
j = 0
for i in range(100001):
if j == 99:
random.shuffle(numbers)
j = 0
long_string += string.printable[numbers[0]]
j += 1
for i in range(26):
if caesar.decipher(caesar.encipher(long_string, i), i) == long_string:
print "TEST 2 SUCCEEDED"
return True
print "TEST 2 FAILED"
return False