(Chilkat2-Python) RSA Signature SHA256withRSA, iso-8859-1, base64

See more RSA Examples

RSA sign the iso-8859-1 byte representation of a string with SHA256withRSA, and return the signature in the base64 encoding.

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

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

# This example will duplicate the following Java code:
# 
# Signature sign = Signature.getInstance("SHA256withRSA");
# sign.initSign(privateKey);
# sign.update(original.getBytes(Charset.forName("ISO-8859-1")));
# 
# ...
# byte[] resultado = sign.sign();
# sello = encodeByteArrayToBase64(resultado);
# 

# Load an RSA private key for signing.
# You can load any format file.  This example loads a .pem, but you can provide path to any type of file holding a private key.
privKey = chilkat2.PrivateKey()
success = privKey.LoadAnyFormatFile("qa_data/pem/rsa_passwd.pem","passwd")
if (success != True):
    print(privKey.LastErrorText)
    sys.exit()

rsa = chilkat2.Rsa()
rsa.ImportPrivateKeyObj(privKey)

originalData = "This is the string to be hashed an RSA signed."

# Indicate that we want the iso-8859-1 byte representation of the string to be signed
rsa.Charset = "iso-8859-1"

# We want the RSA signature in base64 format
rsa.EncodingMode = "base64"

sigBase64 = rsa.SignStringENC(originalData,"sha256")
print(sigBase64)