(CkPython) 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.

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import sys
import chilkat

# 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 = chilkat.CkPrivateKey()
success = privKey.LoadAnyFormatFile("qa_data/pem/rsa_passwd.pem","passwd")
if (success != True):
    print(privKey.lastErrorText())
    sys.exit()

rsa = chilkat.CkRsa()
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.put_Charset("iso-8859-1")

# We want the RSA signature in base64 format
rsa.put_EncodingMode("base64")

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