CkPython Requires Chilkat v11.0.0+

Create PKCS1 RSA Signature with PEM Private Key

See more RSA Examples

Demonstrates how to load a private key from a PEM file and create a PKCS1 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.LoadPemFile("pvkey2_rsa.pem")
if (success == False):
    print(pkey.lastErrorText())
    sys.exit()

rsa = chilkat.CkRsa()

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

#  Get the signature as 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", "md5", "sha256",
#  "sha384", and "sha512".
hexSig = rsa.signStringENC(strData,"sha-1")

print(hexSig)

print("Success!")