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Use Certificate and Private Key PEM Files to Create a Digital SignatureDemonstrates how to load a digital certificate from a PEM file, load it's corresponding private key from a PEM file, save the private key to a key container (if necessary), link the certificate to the key container, and use it to create a digital signature.
import sys import chilkat cert = chilkat.CkCert() # Load the cert from a PEM file; cert.LoadFromFile("cert.pem") pkey = chilkat.CkPrivateKey() # Load the private key from an RSA PEM file: pkey.LoadPemFile("pkey_rsa.pem") # If the "chilkat" key container does not already exist, # we'll create it and import the private key: container = chilkat.CkKeyContainer() needPrivateKeyAccess = True machineKeyset = False if (container.OpenContainer("chilkat",needPrivateKeyAccess,machineKeyset) == False): # We need to create the key container and import # the private key: success = container.CreateContainer("chilkat",machineKeyset) if (success == True): isKeyExchangePair = False success = container.ImportPrivateKey(pkey,isKeyExchangePair) if (success == False): print "Failed to import private key into key container" sys.exit() else: print "Failed to create key container" sys.exit() # At this point, the key container contains the private key. # Link the certificate with the key container: bForSigning = True success = cert.LinkPrivateKey("chilkat",machineKeyset,bForSigning) if (success == False): print "Failed to link certificate with key container" sys.exit() # Use Chilkat Crypt (a non-freeware component) to create # a digital signature using the certificate w/ private key: crypt = chilkat.CkCrypt2() # Any string argument automatically begins the 30-day trial. success = crypt.UnlockComponent("30-day trial") if (success != True): print "Crypt component unlock failed" sys.exit() # Tell the crypt component to use this cert. crypt.SetSigningCert(cert) # We can sign any type of file, creating a .p7s as output: success = crypt.CreateP7S("license.rtf","license.p7s") if (success == False): print crypt.lastErrorText() sys.exit() print crypt.lastErrorText() # Verify and restore the original file: crypt.SetVerifyCert(cert) success = crypt.VerifyP7S("license.rtf","license.p7s") if (success == False): print crypt.lastErrorText() sys.exit() print "Success!" # The Chilkat Certificate, Certificate Store, Private Key, # Public Key, and Key Container classes / objects are freeware. # They are used by and included with the Chilkat Email, # Crypt, S/MIME, and other commercial Chilkat components. |
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