(Chilkat2-Python) Create XML Signature using Java KeyStore (.jks)

Demonstrates how to create an XML digital signature using a certificate and private key from a Java KeyStore (.jks)

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import sys
import chilkat2

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

# The SOAP XML to be signed in this example contains the following:

# <?xml version="1.0" encoding="UTF-8" standalone="no" ?>
# <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
#     <SOAP-ENV:Header>
#         <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" SOAP-ENV:mustUnderstand="1"></wsse:Security>
#     </SOAP-ENV:Header>
#     <SOAP-ENV:Body xmlns:SOAP-SEC="http://schemas.xmlsoap.org/soap/security/2000-12" SOAP-SEC:id="Body">
#         <z:FooBar xmlns:z="http://example.com" />
#     </SOAP-ENV:Body>
# </SOAP-ENV:Envelope>
# 

# Build the XML to sign.
# Use this online tool to generate the code from sample XML: 
# Generate Code to Create XML

xml = chilkat2.Xml()
xml.Tag = "SOAP-ENV:Envelope"
xml.AddAttribute("xmlns:SOAP-ENV","http://schemas.xmlsoap.org/soap/envelope/")
xml.UpdateAttrAt("SOAP-ENV:Header|wsse:Security",True,"xmlns:wsse","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd")
xml.UpdateAttrAt("SOAP-ENV:Header|wsse:Security",True,"SOAP-ENV:mustUnderstand","1")
xml.UpdateAttrAt("SOAP-ENV:Body",True,"xmlns:SOAP-SEC","http://schemas.xmlsoap.org/soap/security/2000-12")
xml.UpdateAttrAt("SOAP-ENV:Body",True,"SOAP-SEC:id","Body")
xml.UpdateAttrAt("SOAP-ENV:Body|z:FooBar",True,"xmlns:z","http://example.com")

# Load a JavaKeyStore file containing the certificate + private key.
jks = chilkat2.JavaKeyStore()
password = "secret"
success = jks.LoadFile(password,"qa_data/jks/test_secret.jks")
if (success != True):
    print(jks.LastErrorText)
    sys.exit()

# Make sure we have a private key.
if (jks.NumPrivateKeys < 1):
    print("No private key available.")
    sys.exit()

# -------------------------------------------------------------------------
# Get the certificate chain associated with the 1st (and probably only) private key in the JKS.
# chain is a CkCertChain
chain = jks.GetCertChain(0)
if (jks.LastMethodSuccess != True):
    print(jks.LastErrorText)
    sys.exit()

# cert is a CkCert
cert = chain.GetCert(0)
if (chain.LastMethodSuccess != True):
    print(chain.LastErrorText)

    sys.exit()

# Verify again that this cert has a private key.
if (cert.HasPrivateKey() != True):
    print("Certificate has no associated private key.")

    sys.exit()

# Prepare for signing...
# Use this online tool to generate the following code from an already-signed XML sample: 
# Generate Code to Create an XML Signature
gen = chilkat2.XmlDSigGen()

# Indicate where the Signature will be inserted.
gen.SigLocation = "SOAP-ENV:Envelope|SOAP-ENV:Header|wsse:Security"

# Add a reference to the fragment of the XML to be signed.
gen.AddSameDocRef("Body","sha1","EXCL_C14N","","")

# (You can read about the SignedInfoPrefixList in the online reference documentation.  It's optional..)
gen.SignedInfoPrefixList = "wsse SOAP-ENV"

# Provide the private key for signing via the certificate, and indicate that
# we want the base64 of the certificate embedded in the KeyInfo.
gen.KeyInfoType = "X509Data"
gen.X509Type = "Certificate"

# Note: Because our certificate was loaded from a JKS which also contained the private key,
# Chilkat automatically knows and has the private key associated with the certificate.
# We set bUsePrivateKey to tell the SetX509Cert method to automatically use the private key
# associated with the certificate for signing.
bUsePrivateKey = True
success = gen.SetX509Cert(cert,bUsePrivateKey)
if (success != True):
    print(gen.LastErrorText)

    sys.exit()

# Everything's specified.  Now create and insert the Signature
sbXml = chilkat2.StringBuilder()
xml.GetXmlSb(sbXml)
success = gen.CreateXmlDSigSb(sbXml)
if (success != True):
    print(gen.LastErrorText)
    sys.exit()

# Examine the XML with the digital signature inserted
print(sbXml.GetAsString())