Hesham/hesham-rsa
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New keys folder and global variables.

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Signed-off-by: HeshamTB <hishaminv@gmail.com>
This commit is contained in:
HeshamTB 2020-04-17 05:21:58 +03:00
parent d23b2d4ae0
commit 936a6eebb6
Signed by: Hesham
GPG Key ID: 74876157D199B09E
2 changed files with 9 additions and 5 deletions
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1
.gitignore vendored
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@ -1 +1,2 @@
__pycache__/
keys/

13
rsa.py
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@ -7,6 +7,9 @@ import math
import os
import sys
keysFolder = "keys/"
byteOrder = "little"
def main():
if sys.argv[1] == "gen" and len(sys.argv) == 4: ##rsa gen <keysize> <keyname>
@ -72,7 +75,7 @@ def encrypt(message, publicKey):
e = publicKey[1]
print("using n: {0}, e: {1}".format(n, e))
msg_number_form = int.from_bytes(msg_text.encode(),"little")
msg_number_form = int.from_bytes(msg_text.encode(), byteOrder)
print("Message: %s or %d" % (msg_text, msg_number_form))
msg_encrypted_number_form = pow(msg_number_form, e, n) # c = msg^e mod n
@ -84,7 +87,7 @@ def decrypt(cipher, privateKey, n):
msg_decrypted_number_form = pow(msg_encrypted_number_form, d, n) # msg = c^d mod n
msg_decrypted = int(msg_decrypted_number_form)
try:
msg_decrypted = str(msg_decrypted.to_bytes(msg_decrypted.bit_length(), "little").decode()).strip()
msg_decrypted = str(msg_decrypted.to_bytes(msg_decrypted.bit_length(), byteOrder).decode()).strip()
except UnicodeDecodeError:
print("Cant decrypt properly")
return msg_decrypted
@ -92,7 +95,7 @@ def decrypt(cipher, privateKey, n):
def getPrime(bits):
while True:
#Byte order "little" or "big" does not matter here since we want a random number from os.urandom()
x = int.from_bytes(os.urandom(int(bits/8)),"little")
x = int.from_bytes(os.urandom(int(bits/8)), byteOrder)
print("trying: ", x, end="")
if isPrime(x):
print("\nprime: ", x)
@ -124,14 +127,14 @@ def isPrime(number):
def readKeyFile(keyName):
key = tuple()
with open(keyName, "r") as keyFile:
with open(keysFolder+keyName, "r") as keyFile:
tempkey = keyFile.readlines()
key = (int(tempkey[0].strip(), 16), int(tempkey[1].strip(), 16), int(tempkey[2].strip(), 16))
return key
def saveKeyFile(key, fileName):
with open(fileName, "w") as keyFile:
with open(keysFolder+fileName, "w") as keyFile:
keyFile.write("{0}\n{1}\n{2}\n".format(hex(key[0]), hex(key[1]), hex(key[2])))
if __name__ == "__main__":