rsa lesson added

training/h4tum/Intro_to_RSA/demo/PEM/gen.py

@@ -0,0 +1,37 @@
+from cryptography.hazmat.primitives.asymmetric import rsa
+from cryptography.hazmat.primitives import serialization
+from Crypto.Util.number import getPrime
+
+e = 65537
+p = getPrime(512)
+q = getPrime(512)
+n = p * q
+phi = (p - 1) * (q - 1)
+d = pow(e, -1, phi)
+
+dp = d % (p - 1)
+dq = d % (q - 1)
+q_inv = pow(q, -1, p)
+
+private_numbers = rsa.RSAPrivateNumbers(
+    p=p,
+    q=q,
+    d=d,
+    dmp1=dp,
+    dmq1=dq,
+    iqmp=q_inv,
+    public_numbers=rsa.RSAPublicNumbers(e=e, n=n)
+)
+
+key = private_numbers.private_key()
+
+print(key.private_bytes(
+    encoding=serialization.Encoding.PEM,
+    format=serialization.PrivateFormat.PKCS8,
+    encryption_algorithm=serialization.NoEncryption()
+).decode())
+
+print(key.public_key().public_bytes(
+    serialization.Encoding.PEM,
+    serialization.PublicFormat.SubjectPublicKeyInfo
+).decode())