(CkPython) Generate an RSA Key and Get as Base64 DER

Demonstrates how to generate a 2048-bit RSA key and return the public and private parts as unencrypted Base64 encoded DER.

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import sys
import chilkat

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

rsa = chilkat.CkRsa()

# Generate a 2048-bit key.  Chilkat RSA supports
success = rsa.GenerateKey(2048)
if (success != True):
    print(rsa.lastErrorText())
    sys.exit()

# Get the public part of the key.
# pubKey is a CkPublicKey
pubKey = rsa.ExportPublicKeyObj()

# There are two possible formats for representing the RSA public key 
# in ASN.1 (DER).  The possible formats are PKCS1 and PKCS8.
# We can get either by setting bChoosePkcs1 to True or False.
bChoosePkcs1 = True
pubKeyBase64Der = pubKey.getEncoded(bChoosePkcs1,"base64")
print("Public Key Base64 DER:")
print(pubKeyBase64Der)

# Now get the private key as Base64 DER:
# Get the private part of the key.
# (Note: A public key is actually just a subset of the private key.  
#  If you have the private key, you also have the public key.
#  Thus Chilkat provides a method to get the public key from the private key.)
# privKey is a CkPrivateKey
privKey = rsa.ExportPrivateKeyObj()

# Again, we can get PKCS1 or PKCS8, but with different methods:
privKeyPkcs1 = privKey.getPkcs1ENC("base64")
print("Private Key PKCS1 Base64 DER:")
print(privKeyPkcs1)

privKeyPkcs8 = privKey.getPkcs8ENC("base64")
print("Private Key PKCS8 Base64 DER:")
print(privKeyPkcs8)