Full signing and verification system.

Signed-off-by: HeshamTB <hishaminv@gmail.com>
This commit is contained in:
HeshamTB 2020-04-18 02:27:16 +03:00
parent 99e2ac0655
commit ff3df34597
Signed by: Hesham
GPG Key ID: 74876157D199B09E

19
rsa.py
View File

@ -54,12 +54,15 @@ def main():
if sys.argv[1] == "decrypt": ##rsa decrypt <cipher> <key>
cipher = sys.argv[2]
cipher_list = cipher.split()
sig = verify(cipher_list)
del cipher_list[-1]
msg_decrypted = ""
key = readKeyFile(sys.argv[3])
for cipher_word in cipher_list:
msg_decrypted = msg_decrypted + " " + str(decrypt(int(cipher_word),key[D],key[N]))
#with open(fileName, "r") as cipherFile:
# cipher = int(cipherFile.readline()) ##one line may make problems later with padding
print("Signed by: ", sig)
print("Decrypted message: \n", msg_decrypted)
@ -155,7 +158,20 @@ def sign(encrypted_msg, key):
signed_msg = ""
for word in encrypted_msg_list:
signed_msg = str(signed_msg) + " " + str(word)
return signed_msg
return signed_msg.strip()
def verify(cipher_list):
sig = "Unknown"
local_keys = os.listdir(keysFolder)
cipher_list.reverse() #To get last word using index 0
encrypted_sig = cipher_list[0]
cipher_list.reverse()
for key_name in local_keys:
key = readKeyFile(key_name)
print("Found key: ", key_name)
sig = str(decrypt(int(encrypted_sig), key[E], key[N]))
if "sig:" in sig:
return sig.replace("sig:","")
def readKeyFile(keyName):
key = tuple()
@ -187,6 +203,7 @@ def printKey(key):
e = key[E]
d = key[D]
print("----------------------------------------------"+
"\nID: {}".format(key[ID]) +
"\n{}-BIT KEY".format(n.bit_length())+
"\nPUBLIC PART:"+
"\n{0}/{1}".format(hex(n), hex(e))+