CkPython

RSA Sign using Base64 Private Key

See more RSA Examples

Signs a string using a non-encrypted RSA private key in base64 encoding. Returns the RSA signature as a base64 string. CkPython

import sys
import chilkat

success = False

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

privKey = chilkat.CkPrivateKey()

sbPem = chilkat.CkStringBuilder()
sbPem.AppendLine("-----BEGIN RSA PRIVATE KEY-----",True)
sbPem.AppendLine("MIIC .... j5A==",True)
sbPem.AppendLine("-----END RSA PRIVATE KEY-----",True)

success = privKey.LoadPem(sbPem.getAsString())
if (success == False):
    print(privKey.lastErrorText())
    sys.exit()

rsa = chilkat.CkRsa()

success = rsa.UsePrivateKey(privKey)
if (success == False):
    print(rsa.lastErrorText())
    sys.exit()

bd = chilkat.CkBinData()
bd.AppendString("12345678","utf-8")

success = rsa.SignRawBd(bd)
if (success == False):
    print(rsa.lastErrorText())
    sys.exit()

# Get the base64 RSA signature.
print(bd.getEncoded("base64"))

success = rsa.VerifyRawBd(bd)
if (success == False):
    print(rsa.lastErrorText())
    sys.exit()

strOriginal = bd.getString("utf-8")
print(strOriginal)