Classic ASP
Classic ASP
SAML Signature Validation
See more XML Digital Signatures Examples
A SAML Signature is an XML Digital Signature (XMLDSig) just like any other XML digital signature. It can be verified by using Chilkat' XmlDSig class, as shown in this example.Chilkat Classic ASP Downloads
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0
' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.
set dsig = Server.CreateObject("Chilkat.XmlDSig")
success = dsig.LoadSignature("XML xml signature goes here...")
' A sample SAML signature is shown below..
numSignatures = dsig.NumSignatures
i = 0
Do While i < numSignatures
dsig.Selector = i
bVerifyRefDigests = 0
bSignatureVerified = dsig.VerifySignature(bVerifyRefDigests)
If (bSignatureVerified = 1) Then
Response.Write "<pre>" & Server.HTMLEncode( "Signature " & i + 1 & " verified") & "</pre>"
Else
Response.Write "<pre>" & Server.HTMLEncode( "Signature " & i + 1 & " invalid") & "</pre>"
End If
' Check each of the reference digests separately..
numRefDigests = dsig.NumReferences
j = 0
Do While j < numRefDigests
bDigestVerified = dsig.VerifyReferenceDigest(j)
Response.Write "<pre>" & Server.HTMLEncode( "reference digest " & j + 1 & " verified = " & bDigestVerified) & "</pre>"
If (bDigestVerified = 0) Then
Response.Write "<pre>" & Server.HTMLEncode( " reference digest fail reason: " & dsig.RefFailReason) & "</pre>"
End If
j = j + 1
Loop
i = i + 1
Loop
' --------------------------------------
' Here is a sample SAML XML Signature
'
'
' <?xml version="1.0" encoding="UTF-8"?>
' <saml2p:Response xmlns:saml2p="urn:oasis:names:tc:SAML:2.0:protocol" ID="abc123" Version="2.0" IssueInstant="2022-04-01T12:34:56Z" Destination="https://sp.example.com/sso">
' <saml2:Issuer xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion">https://idp.example.com</saml2:Issuer>
' <saml2p:Status>
' <saml2p:StatusCode Value="urn:oasis:names:tc:SAML:2.0:status:Success"/>
' </saml2p:Status>
' <saml2:Assertion xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion" ID="def456" IssueInstant="2022-04-01T12:34:56Z" Version="2.0">
' <saml2:Issuer>https://idp.example.com</saml2:Issuer>
' <saml2:Subject>
' <saml2:NameID Format="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress">user@example.com</saml2:NameID>
' </saml2:Subject>
' <saml2:Conditions NotBefore="2022-04-01T12:34:56Z" NotOnOrAfter="2022-04-01T13:34:56Z"/>
' <saml2:AuthnStatement AuthnInstant="2022-04-01T12:34:56Z">
' <saml2:AuthnContext>
' <saml2:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:Password</saml2:AuthnContextClassRef>
' </saml2:AuthnContext>
' </saml2:AuthnStatement>
' <!-- Additional assertion content -->
' </saml2:Assertion>
' <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#"/>
' <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
' <ds:Reference URI="#abc123">
' <ds:Transforms>
' <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
' <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
' </ds:Transforms>
' <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
' <ds:DigestValue>q7Zj1w+...+pCsjw=</ds:DigestValue>
' </ds:Reference>
' <!-- Additional references if present -->
' </ds:SignedInfo>
' <ds:SignatureValue>
' NjIzOWE5ZjA2M2M1...NzUwNzUwNzUwNzUwNzU=
' </ds:SignatureValue>
' <ds:KeyInfo>
' <ds:X509Data>
' <ds:X509Certificate>
' MIIDgzCCAmugAwIBAg...AgADAA==
' </ds:X509Certificate>
' </ds:X509Data>
' </ds:KeyInfo>
' </ds:Signature>
' </saml2p:Response>
%>
</body>
</html>