Chilkat2-Python

Sign Italian SPID Metadata XML

See more XML Digital Signatures Examples

Demonstrates how to create an XML digital signature for Italian SPID Metadata. Chilkat2-Python

import sys
import chilkat2

success = False

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

success = True

# Load the XML to be signed.
sbXml = chilkat2.StringBuilder()
success = sbXml.LoadFile("qa_data/xml_dsig/spid_metadata.xml","utf-8")
if (success == False):
    print("Failed to load the input file.")
    sys.exit()

# The XML to sign contains XML such as this:

# <?xml version="1.0" encoding="utf-8"?>
# <md:EntityDescriptor xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" entityID="https://***.it" ID="_AE17AFFF-A600-49D5-B81D-76EEA55B50FF">
#     <md:SPSSODescriptor protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol" AuthnRequestsSigned="true" WantAssertionsSigned="true">
#         <md:KeyDescriptor use="signing">
#             <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
#                 <ds:X509Data>
#                     <ds:X509Certificate>MIIF5...</ds:X509Certificate>
#                 </ds:X509Data>
#             </ds:KeyInfo>
#         </md:KeyDescriptor>
#         <md:KeyDescriptor use="encryption">
#             <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
#                 <ds:X509Data>
#                     <ds:X509Certificate>MIIF5...</ds:X509Certificate>
#                 </ds:X509Data>
#             </ds:KeyInfo>
#         </md:KeyDescriptor>
#         <md:SingleLogoutService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://***.it/it-it/spid/logout"/>
#         <md:NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:transient</md:NameIDFormat>
#         <md:AssertionConsumerService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://***.it/it-it/spid/loginresp" index="0" isDefault="true"/>
#         <md:AttributeConsumingService index="1">
#             <md:ServiceName xml:lang="it">Servizi Online</md:ServiceName>
#             <md:ServiceDescription xml:lang="it">Accesso ai Servizi Online</md:ServiceDescription>
#             <md:RequestedAttribute Name="spidCode" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
#             <md:RequestedAttribute Name="name" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
#             <md:RequestedAttribute Name="familyName" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
#             <md:RequestedAttribute Name="fiscalNumber" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
#         </md:AttributeConsumingService>
#     </md:SPSSODescriptor>
#     <md:Organization>
#         <md:OrganizationName xml:lang="it">SomeCompany s.r.l.</md:OrganizationName>
#         <md:OrganizationDisplayName xml:lang="it">SomeCompany s.r.l.</md:OrganizationDisplayName>
#         <md:OrganizationURL xml:lang="it">https://***.it</md:OrganizationURL>
#     </md:Organization>
# </md:EntityDescriptor>

gen = chilkat2.XmlDSigGen()

gen.SigLocation = "md:EntityDescriptor|md:SPSSODescriptor"
gen.SigLocationMod = 2
gen.SignedInfoCanonAlg = "EXCL_C14N"
gen.SignedInfoDigestMethod = "sha256"

# -------- Reference 1 --------
gen.AddSameDocRef("_AE17AFFF-A600-49D5-B81D-76EEA55B50FF","sha256","EXCL_C14N","","")

# Provide a certificate + private key. (PFX password is test123)
cert = chilkat2.Cert()
success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
if (success != True):
    print(cert.LastErrorText)
    sys.exit()

gen.SetX509Cert(cert,True)

gen.KeyInfoType = "X509Data+KeyValue"
gen.X509Type = "Certificate"

gen.Behaviors = "IndentedSignature,ForceAddEnvelopedSignatureTransform,OmitAlreadyDefinedSigNamespace"

# Sign the XML...
success = gen.CreateXmlDSigSb(sbXml)
if (success != True):
    print(gen.LastErrorText)
    sys.exit()

# -----------------------------------------------

# Save the signed XML to a file.
success = sbXml.WriteFile("qa_output/signedXml.xml","utf-8",False)

print(sbXml.GetAsString())

# ----------------------------------------
# Verify the signatures we just produced...
verifier = chilkat2.XmlDSig()
success = verifier.LoadSignatureSb(sbXml)
if (success != True):
    print(verifier.LastErrorText)
    sys.exit()

numSigs = verifier.NumSignatures
verifyIdx = 0
while verifyIdx < numSigs :
    verifier.Selector = verifyIdx
    verified = verifier.VerifySignature(True)
    if (verified != True):
        print(verifier.LastErrorText)
        sys.exit()

    verifyIdx = verifyIdx + 1

print("All signatures were successfully verified.")