CkPython

RSA Sign Using Private Key from .pfx/.p12 to Base64 Signature

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Demonstrates how to RSA sign something using a private key loaded from a .pfx/.p12. The RSA signature is returned in Base64 encoded format. 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.

rsa = chilkat.CkRsa()

# Load the .pfx/.p12
pfx = chilkat.CkPfx()
success = pfx.LoadPfxFile("qa_data/pfx/myKey.p12","myPassword")
if (success == False):
    print(pfx.lastErrorText())
    sys.exit()

# Get the default private key.

privKey = chilkat.CkPrivateKey()
success = pfx.PrivateKeyAt(0,privKey)
if (success == False):
    print(pfx.lastErrorText())
    sys.exit()

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

# Get the signature in base64
rsa.put_EncodingMode("base64")

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

# Sign the string using the sha256 hash algorithm.
# Other valid choices are "sha384", "sha512", "sha-1", "md2" and "md5".
base64Sig = rsa.signStringENC(strData,"sha256")

print(base64Sig)

print("Success!")