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(VB.NET) Verify SOAP XML using a wsse:SecurityTokenReference

This example verifies a SOAP XML Digital Signature where the KeyInfo in the XML Signature is a wsse:SecurityTokenReference to the X.509 certificate embedded elsewhere in the SOAP XML.

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

'  The SOAP XML with digital signature verified in this example is available at
'  https://www.chilkatsoft.com/exampleData/signedSoapBinarySecurityToken.xml

Dim signedSoapXmlUrl As String = "https://www.chilkatsoft.com/exampleData/signedSoapBinarySecurityToken.xml"

'  First, let's get the signed SOAP XML..
Dim http As New Chilkat.Http
Dim sbXml As New Chilkat.StringBuilder
Dim success As Boolean = http.QuickGetSb(signedSoapXmlUrl,sbXml)
If (success <> True) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


'  The signed XML downloaded from the above URL contains the following.
'  Note: Everything we need to verify the signature is already available within the signed XML.
'  The KeyInfo part of the Signature contains a reference to the wsse:BinarySecurityToken
'  For clarity, here is the KeyInfo section extracted from the Signature below:
' 
'  <ds:KeyInfo><wsse:SecurityTokenReference><wsse:Reference URI="#x509cert00" ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509" /></wsse:SecurityTokenReference></ds:KeyInfo>
' 
'  Chilkat has the capability to automatically follow the SecurityTokenReference.  It will automatically locate the
'  certificate contained in the wsse:BinarySecurityToken element (in this case identified by Id="x509cert00"),
'  automatically extracts the public key from the base64 X.509 certificate, and uses it to verify the signature.

'  <?xml version="1.0" encoding="UTF8"?>
'  <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
'  <SOAP-ENV:Header>
'   <wsse:Security xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
'                  xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd"
'                  xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"
'                  xmlns:xenc="http://www.w3.org/2001/04/xmlenc#" SOAP-ENV:mustUnderstand="1">
'   <wsse:BinarySecurityToken
'                 EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary"
'                 ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509"
'                 wsu:Id="x509cert00">MIIDgzCCAmugAwIBAgIBADANBgkqhkiG9w0BAQUFADBcMRUwEwYDVQQDDAxUZXN0
'  IENvbXBhbnkxCzAJBgNVBAYTAkFVMRMwEQYDVQQIDApTb21lLVN0YXRlMSEwHwYD
'  VQQKDBhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQwHhcNMTcwOTEzMDA1NTM1WhcN
'  MTgwOTEzMDA1NTM1WjBcMRUwEwYDVQQDDAxUZXN0IENvbXBhbnkxCzAJBgNVBAYT
'  AkFVMRMwEQYDVQQIDApTb21lLVN0YXRlMSEwHwYDVQQKDBhJbnRlcm5ldCBXaWRn
'  aXRzIFB0eSBMdGQwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDiWRKl
'  x+88u4SKZnfCMraqMsfJCs6tcz3EjMYTWmRKhhUOE9pDkvZfv0mgF7pNHsTKvFRt
'  oVnEVQaZC5TlHNOGa2QWit9YuruWjW8VSaU4s9gR1/Cg9/Zc8Z0yUEDpsaVnwuoA
'  RpVzvzoRzPmTNpMNEcQ07aBjHP7OJrwyvcdqQA1BbfDVMmRmw1d+/i8tyR3cTyzl
'  /3TismN5nrmhGh/ZF75FFA/xDN7PbVYDPowiFnEVHiBrYh2mFTabRUnb7K4oLx+d
'  1L5x3Az299F/HYZlBenXpJLtnCL3+HY6qsGXVbzKjlKNqbXsmlzVkChu093weN/q
'  UvWO2883cEiXmdqxAgMBAAGjUDBOMB0GA1UdDgQWBBRsMy2bxsCKYyUYtTYz/zZb
'  z7Le0zAfBgNVHSMEGDAWgBRsMy2bxsCKYyUYtTYz/zZbz7Le0zAMBgNVHRMEBTAD
'  AQH/MA0GCSqGSIb3DQEBBQUAA4IBAQBnFQ+Sc3s8y79DTsA7CvvAFeG/zvWQiu8y
'  UM5LO1QcWeQQj29GMThqrY21dNfkynl7mZUMEeXKvwwzweFCc2odiUPHxoV1G4FE
'  tzNaZ8Ap9jye78YQ8SB8NPQwC7ovecfSqNflT4NMAThSuxpGp8Ugf7a24LXozLzL
'  bCRvG9sLGyRneZbfU8B43ELRLCkjzWR32N7D2pmKk4CEMiW0ScphU1JEHaimneMa
'  TFc63hNzKpuj7+BGv4ZuvB1j/Mbmz53PGgFKnGQHPb2TIvMxyB+lML5vE0Bm8YWt
'  P8DNyx11CCCdBdMWfeta6MjmmqcV5/YEq92c5O2Ql94tWFNLR6wQ
'  </wsse:BinarySecurityToken>
'   <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"><ds:SignedInfo><ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"><InclusiveNamespaces xmlns="http://www.w3.org/2001/10/xml-exc-c14n#" PrefixList="wsse SOAP-ENV"/></ds:CanonicalizationMethod><ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/><ds:Reference URI="#TheBody"><ds:Transforms><ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/></ds:Transforms><ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><ds:DigestValue>VhsSnaEAFsY0OYegKQh99v9csXg=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>Ynp3H4rtzpXIh4TaVxkpEkS1bMCCu672aeCzUOzheNNfnpmLsCZz3+zQjMBbchPggCayC5ihpEdhRe3XvPXjPXXAgxDP4mic091QPmjHlmUcu8yqRKfxnPtD35nqaxDtCYw+jGIzj+ch094vA4RPCfY8JQnb1mpy1ZjjsMW8741CIh1epbsd/0bZt6tfINUQ37seg07yvLbCJZ/Zf+h8FlFryQk6lHTTeZl/GfQ9NlDBcShby3x8Hc1KwW++zFqEA7G783R9AYPYn3fWTOBhYk5gkgFc+HaPRLR/L0Bp7ZPbmOR/iZQ+HK4W672tTdN/R2GdN7/deV7QTp2DYK1Z8w==</ds:SignatureValue><ds:KeyInfo><wsse:SecurityTokenReference><wsse:Reference URI="#x509cert00" ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509" /></wsse:SecurityTokenReference></ds:KeyInfo></ds:Signature></wsse:Security>
'  </SOAP-ENV:Header>
'  <SOAP-ENV:Body xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="TheBody">
'   <getVersion xmlns="http://msgsec.wssecfvt.ws.ibm.com"/>
'  </SOAP-ENV:Body>
'  </SOAP-ENV:Envelope>
' 

'  To verify this signature, we simply load and verify:
Dim verifier As New Chilkat.XmlDSig
success = verifier.LoadSignatureSb(sbXml)
If (success <> True) Then
    Debug.WriteLine(verifier.LastErrorText)
    Exit Sub
End If


Dim bVerified As Boolean = verifier.VerifySignature(True)
If (bVerified <> True) Then
    Debug.WriteLine(verifier.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Signature verified!")

 

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