(Chilkat2-Python) Create EBICS Signature (XMLDSIG)

See more EBICS Examples

Demonstrates how to create an EBICS signature. (EBICS is the Electronic Banking Internet Communication Standard)

Note: This example requires Chilkat v9.5.0.88 or above.

Chilkat2 Python Downloads

install with pip
pip3 install chilkat2
or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

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

# This is the sample XML to be signed:

# <?xml version="1.0" encoding="UTF-8"?>
# <ebicsRequest
#   xmlns="urn:org:ebics:H005"
#   xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
#   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
#   xsi:schemaLocation="urn:org:ebics:H005 ebics_request_H005.xsd"
#   Version="H005" Revision="1">
#   <header authenticate="true">
#     <static>
#       <HostID>EBIXHOST</HostID>
#       <Nonce>BDA2312973890654FAC9879A89794E65</Nonce>
#       <Timestamp>2005-01-30T15:30:45.123Z</Timestamp>
#       <PartnerID>CUSTM001</PartnerID>
#       <UserID>USR100</UserID>
#       <Product Language="en" InstituteID="Institute ID">Product Identifier</Product>
#       <OrderDetails>
#         <AdminOrderType>BTU</AdminOrderType>
#         <BTUOrderParams>
#           <Service>
#             <ServiceName>SCT</ServiceName>
#             <MsgName>pain.001</MsgName>
#           </Service>
#         </BTUOrderParams>
#       </OrderDetails>
#       <BankPubKeyDigests>
#         <Authentication Version="X002" Algorithm="http://www.w3.org/2001/04/xmlenc#sha256">1H/rQr2Axe9hYTV2n/tCp+3UIQQ=</Authentication>
#         <Encryption Version="E002" Algorithm="http://www.w3.org/2001/04/xmlenc#sha256">2lwiueWOIER823jSoiOkjl+woeI=</Encryption>
#       </BankPubKeyDigests>
#       <SecurityMedium>0000</SecurityMedium>
#       <NumSegments>2</NumSegments>
#     </static>
#     <mutable>
#       <TransactionPhase>Initialisation</TransactionPhase>
#     </mutable>
#   </header>
#   <body>
#     <PreValidation authenticate="true">
#       <DataDigest SignatureVersion="A006"> MTIzNDU2Nzg5MDEyMzQ1Njc4OTAxMjM0NTY3ODkwMTI=</DataDigest>
#     </PreValidation>
#     <DataTransfer>
#       <DataEncryptionInfo authenticate="true">
#         <EncryptionPubKeyDigest Version="E002" Algorithm="http://www.w3.org/2001/04/xmlenc#sha256">..here hash value of the public bank key for encryption..</EncryptionPubKeyDigest>
#         <TransactionKey>EIGI4En6KEB6ArEzw+iq4N1wm6EptcyxXxStA...</TransactionKey>
#         <HostID>EBIXHOST</HostID>
#       </DataEncryptionInfo>
#       <SignatureData authenticate="true">n6KEB6ArEzw+iq4N1wm6EptcyxXxStAO...</SignatureData>
#       <DataDigest SignatureVersion="A006"> MTIzNDU2Nzg5MDEyMzQ1Njc4OTAxMjM0NTY3ODkwMTI=</DataDigest>
#     </DataTransfer>
#   </body>
# </ebicsRequest>

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

gen = chilkat2.XmlDSigGen()

# We're going to insert the signature between the </header> and the <body>
gen.SigLocation = "ebicsRequest|header"

# Set the SigLocationMod = 1 to insert *after* the SigLocation
gen.SigLocationMod = 1

# We wish to use "ds" for the namespace..
gen.SigNamespacePrefix = "ds"
gen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#"

# Specify canonicalization and hash algorithms
gen.SignedInfoCanonAlg = "C14N"
gen.SignedInfoDigestMethod = "sha256"

# Add the reference.
# For EBICS signatures, we pass the special keyword "EBICS" in the 1st argument.
# This tells Chilkat to create the reference using URI="#xpointer(//*[@authenticate='true'])"
# The "EBICS" keyword was introduced in Chilkat v9.5.0.88.
gen.AddSameDocRef("EBICS","sha256","C14N","","")

# Provide our certificate + private key. (PFX password is test123)
# (You'll use your own certificate, which can be loaded from many different sources by Chilkat, including smart cards.)
cert = chilkat2.Cert()
success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
if (success == False):
    print(cert.LastErrorText)
    sys.exit()

success = gen.SetX509Cert(cert,True)
if (success == False):
    print(gen.LastErrorText)
    sys.exit()

# We don't want a KeyInfo to be included.
gen.KeyInfoType = "None"

# Request an indented signature for readability.
# This can be removed after debugging (for a more compact signature).
gen.Behaviors = "IndentedSignature"

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

# This is the XML with the EBICS signature added:

# <?xml version="1.0" encoding="UTF-8"?>
# <ebicsRequest
# xmlns="urn:org:ebics:H005"
# xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
# xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
# xsi:schemaLocation="urn:org:ebics:H005 ebics_request_H005.xsd"
# Version="H005" Revision="1">
#   <header authenticate="true">
#     <static>
#       <HostID>EBIXHOST</HostID>
#       <Nonce>BDA2312973890654FAC9879A89794E65</Nonce>
#       <Timestamp>2005-01-30T15:30:45.123Z</Timestamp>
#       <PartnerID>CUSTM001</PartnerID>
#       <UserID>USR100</UserID>
#       <Product Language="en" InstituteID="Institute ID">Product Identifier</Product>
#       <OrderDetails>
#         <AdminOrderType>BTU</AdminOrderType>
#         <BTUOrderParams>
#           <Service>
#             <ServiceName>SCT</ServiceName>
#             <MsgName>pain.001</MsgName>
#           </Service>
#         </BTUOrderParams>
#       </OrderDetails>
#       <BankPubKeyDigests>
#         <Authentication Version="X002" Algorithm="http://www.w3.org/2001/04/xmlenc#sha256">1H/rQr2Axe9hYTV2n/tCp+3UIQQ=</Authentication>
#         <Encryption Version="E002" Algorithm="http://www.w3.org/2001/04/xmlenc#sha256">2lwiueWOIER823jSoiOkjl+woeI=</Encryption>
#       </BankPubKeyDigests>
#       <SecurityMedium>0000</SecurityMedium>
#       <NumSegments>2</NumSegments>
#     </static>
#     <mutable>
#       <TransactionPhase>Initialisation</TransactionPhase>
#     </mutable>
#   </header><AuthSignature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
#   <ds:SignedInfo>
#     <ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
#     <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
#     <ds:Reference URI="#xpointer(//*[@authenticate='true'])">
#       <ds:Transforms>
#         <ds:Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
#       </ds:Transforms>
#       <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
#       <ds:DigestValue>jjLD90BedcIVxFENHse6pOnRubVUlHpKjXUF5BUd00k=</ds:DigestValue>
#     </ds:Reference>
#   </ds:SignedInfo>
#   <ds:SignatureValue>TlVgCXGf+3kKZ4LLwqxKoMaDZSBdiDRcGpdKB+tFZ7MZse9jDqtCai7PxcvRLC7yRGRj3XWrAB6IVqXh6tXGqiAtRfa7XjezvJTmUdMEJ3hTEgKqm7cKjjZX5C+lN5XTJghOy0X1bZBl/NBJu/aqY9s8PKsD5Cpm8bFkl2ReBBTCTSF5CRK3XZr+fvWuUX2sFrFS5UDXG8/cmhaKHT15LBOJgYuLYr80dtL251Jy20rIJ5KK8xUz9gpexE61Y/ml6mUPLm8YgdACRdNvCOPRLjCqYwFbnfgaVO6MtSRG819rWyNtBhqVxdzbntiV1UobKbwFiJ1LMMHF0NCo2LGLCw==</ds:SignatureValue>
# </AuthSignature>
#   <body>
#     <PreValidation authenticate="true">
#       <DataDigest SignatureVersion="A006"> MTIzNDU2Nzg5MDEyMzQ1Njc4OTAxMjM0NTY3ODkwMTI=</DataDigest>
#     </PreValidation>
#     <DataTransfer>
#       <DataEncryptionInfo authenticate="true">
#         <EncryptionPubKeyDigest Version="E002" Algorithm="http://www.w3.org/2001/04/xmlenc#sha256">..here hash value of the public bank key for encryption..</EncryptionPubKeyDigest>
#         <TransactionKey>EIGI4En6KEB6ArEzw+iq4N1wm6EptcyxXxStA...</TransactionKey>
#         <HostID>EBIXHOST</HostID>
#       </DataEncryptionInfo>
#       <SignatureData authenticate="true">n6KEB6ArEzw+iq4N1wm6EptcyxXxStAO...</SignatureData>
#       <DataDigest SignatureVersion="A006"> MTIzNDU2Nzg5MDEyMzQ1Njc4OTAxMjM0NTY3ODkwMTI=</DataDigest>
#     </DataTransfer>
#   </body>
# </ebicsRequest>

print("Here's the EBICS signed XML:")
print(sbXml.GetAsString())
print("----")

# Verify the signature we just produced...
verifier = chilkat2.XmlDSig()
success = verifier.LoadSignatureSb(sbXml)
if (success == False):
    print(verifier.LastErrorText)
    sys.exit()

# The signature has no KeyInfo, so we must externally provide the key.
# pubKey is a CkPublicKey
pubKey = cert.ExportPublicKey()
success = verifier.SetPublicKey(pubKey)
if (success == False):
    print(verifier.LastErrorText)

    sys.exit()

success = verifier.VerifySignature(True)
if (success == False):
    print(verifier.LastErrorText)
    sys.exit()

print("EBICS signature verified.")