def generiraj_moj_sha1(self):
ulaz_items = fh.load(self.ulaz_path)
data = str(fh.concatList(fh.get_items("Data", ulaz_items)))
data = fh.toHex(data)
sha1 = moj_sha1.mojSha1(data)
sazetak = str(sha1.digest()).upper()
fh.writeSha1(self.sazetak_path, "Data hash", "MOJ SHA-1", sazetak)
def generiraj_moj_pecat(self):
ulaz_items = fh.load(self.ulaz_path)
data = fh.concatList(fh.get_items('Data', ulaz_items))
rsa_b_javni_items = fh.load(self.rsa_b_javni_path)
rsa_b_javni_kljuc = bytes.fromhex(
fh.concatList(fh.get_items('Secret key', rsa_b_javni_items)))
if len(data) % 16 != 0:
data += ' ' * (16 - len(data) % 16)
desKey = os.urandom(8)
self.iv = Random.new().read(DES.block_size)
des_enkriptor = DES.new(desKey, DES.MODE_OFB, self.iv)
kriptirano = str(des_enkriptor.encrypt(data).hex()).upper()
RSAenkripter = RSA.importKey(rsa_b_javni_kljuc)
enkripter = PKCS1_OAEP.new(RSAenkripter)
desKeyKriptirano = enkripter.encrypt(desKey).hex().upper()
keylen = len(fh.get_items("Secret key", rsa_b_javni_items))
if keylen == 10:
keylen = '0800'
elif keylen == 19:
keylen = '1000'
else:
keylen = '0400'
fh.writeOmotnica(self.omotnica_path, 'Envelope', 'DES\n\tRSA',
'0010\n\t' + keylen, kriptirano, desKeyKriptirano)
rsa_a_tajni_items = fh.load(self.rsa_a_tajni_path)
kriptirano = fh.toHex(kriptirano)
sha1 = moj_sha1.mojSha1(kriptirano)
sazetak = str(sha1.digest()).upper()
fh.writeSha1(self.sazetak_path, "Data hash", "MOJ SHA-1", sazetak)
sazetak = bytes.fromhex(sazetak)
rsa_a_tajni_kljuc = bytes.fromhex(
fh.concatList(fh.get_items("Secret key", rsa_a_tajni_items)))
RSAenkripter = RSA.importKey(rsa_a_tajni_kljuc)
potpis = str(RSAenkripter.sign(sazetak, '')[0])
fh.writePotpis(self.potpis_path, "Signature", "SHA-1\n\tRSA", "0080",
potpis)
def otvori_moj_pecat(self):
omotnica_items = fh.load(self.omotnica_path)
rsa_a_javni_items = fh.load(self.rsa_a_javni_path)
potpis_items = fh.load(self.potpis_path)
data = fh.concatList(fh.get_items("Envelope data", omotnica_items))
data = fh.toHex(data)
rsa_a_javni_kljuc = bytes.fromhex(
fh.concatList(fh.get_items("Secret key", rsa_a_javni_items)))
potpis = str(fh.concatList(fh.get_items("Signature", potpis_items)))
sha1 = moj_sha1.mojSha1(data)
sazetak = bytes.fromhex(str(sha1.digest()).upper())
RSAenkriptor = RSA.importKey(rsa_a_javni_kljuc)
if RSAenkriptor.verify(sazetak, (int(potpis), '')):
print("PORUKA JE AUTENTICNA")
else:
print("PORUKA NIJE AUTENTICNA")
envelope_data_items = fh.load(self.omotnica_path)
envelope_data = bytes.fromhex(
fh.concatList(fh.get_items("Envelope data", envelope_data_items)))
envelope_crypt_key = fh.concatList(
fh.get_items("Envelope crypt key", envelope_data_items))
envelope_crypt_key = bytes.fromhex(envelope_crypt_key)
rsa_b_tajni_items = fh.load(self.rsa_b_tajni_path)
rsa_b_tajni_key = fh.concatList(
fh.get_items("Secret key", rsa_b_tajni_items))
rsa_b_tajni_key = bytes.fromhex(rsa_b_tajni_key)
RSAkey = RSA.importKey(rsa_b_tajni_key)
cipher = PKCS1_OAEP.new(RSAkey)
desKey = cipher.decrypt(envelope_crypt_key)
DESdekripter = DES.new(desKey, DES.MODE_OFB, self.iv)
data = DESdekripter.decrypt(envelope_data)
data = data.decode('utf-8', 'ignore')
fh.writeIzlaz(self.izlaz_path, "Dekriptirana omotnica", "DES\n\tRSA",
data)
def provjeri_moj_potpis(self):
ulaz_items = fh.load(self.ulaz_path)
rsa_a_javni_items = fh.load(self.rsa_a_javni_path)
potpis_items = fh.load(self.potpis_path)
data = fh.concatList(fh.get_items("Data", ulaz_items))
data = fh.toHex(data)
rsa_a_javni_kljuc = bytes.fromhex(fh.concatList(fh.get_items("Secret key", rsa_a_javni_items)))
potpis = str(fh.concatList(fh.get_items("Signature", potpis_items)))
sha1 = moj_sha1.mojSha1(data)
sazetak = bytes.fromhex(str(sha1.digest()).upper())
RSAenkriptor = RSA.importKey(rsa_a_javni_kljuc)
if RSAenkriptor.verify(sazetak, (int(potpis), '')):
print("PORUKA JE AUTENTICNA")
else:
print("PORUKA NIJE AUTENTICNA")
def generiraj_moj_potpis(self):
ulaz_items = fh.load(self.ulaz_path)
rsa_a_tajni_items = fh.load(self.rsa_a_tajni_path)
data = fh.concatList(fh.get_items("Data", ulaz_items))
data = fh.toHex(data)
sha1 = moj_sha1.mojSha1(data)
sazetak = str(sha1.digest()).upper()
fh.writeSha1(self.sazetak_path, "Data hash", "MOJ SHA-1", sazetak)
sazetak = bytes.fromhex(sazetak)
rsa_a_tajni_kljuc = bytes.fromhex(fh.concatList(fh.get_items("Secret key", rsa_a_tajni_items)))
RSAenkripter = RSA.importKey(rsa_a_tajni_kljuc)
potpis = str(RSAenkripter.sign(sazetak, '')[0])
fh.writePotpis(self.potpis_path, "Signature", "MOJ SHA-1\n\tRSA", "0080", potpis)