Chilkat2-Python

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. Chilkat2-Python

import sys
import chilkat2

success = False

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

pkey = chilkat2.PrivateKey()

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

rsa = chilkat2.Rsa()

# 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.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)