(CkPython) RSA Sign with PKCS8 Encrypted Key

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

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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.

pkey = chilkat.CkPrivateKey()

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

# Get the private key in XML format:
pkeyXml = pkey.getXml()

rsa = chilkat.CkRsa()

# Import the private key into the RSA object:
success = rsa.ImportPrivateKey(pkeyXml)
if (success != True):
    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)