CkPython Requires Chilkat v11.0.0+

RSA Sign with PKCS8 Encrypted Key

See more RSA Examples

Demonstrates how to load a private key from an encrypted PKCS8 file and create an RSA digital signature. CkPython

import sys
import chilkat

success = False

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

pkey = chilkat.CkPrivateKey()

#  Load the private key from an RSA PEM file:
success = pkey.LoadPkcs8EncryptedFile("privateKey.key","myPassword")

rsa = chilkat.CkRsa()

#  Import the private key into the RSA object:
success = rsa.UsePrivateKey(pkey)
if (success == False):
    print(rsa.lastErrorText())
    sys.exit()

#  Return the signature in hex
rsa.put_EncodingMode("hex")

strData = "This is the string to be signed."

#  Sign the string using the sha-1 hash algorithm.
#  Other valid choices are "md2", "sha256", "sha384", "sha512",  and "md5".
hexSig = rsa.signStringENC(strData,"sha-1")

print(hexSig)