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(Classic ASP) SOAP XML Digital Signature using RSA KeyDemonstrates how to sign content in a SOAP XML document using an RSA key. This example requires Chilkat v9.5.0.69 or greater.
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> <% ' 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> ' ' The above XML is available at https://www.chilkatsoft.com/exampleData/soapToSign.xml ' Fetch the XML and then sign it.. url = "https://www.chilkatsoft.com/exampleData/soapToSign.xml" ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Http") set http = Server.CreateObject("Chilkat.Http") ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.StringBuilder") set sbSoapXml = Server.CreateObject("Chilkat.StringBuilder") success = http.QuickGetSb(url,sbSoapXml) If (success <> 1) Then Response.Write "<pre>" & Server.HTMLEncode( http.LastErrorText) & "</pre>" Response.End End If ' We'll need an RSA private key for signing. ' There are many ways of getting an RSA private key using Chilkat. This example ' will load one from a PEM file. ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.PrivateKey") set rsaKey = Server.CreateObject("Chilkat.PrivateKey") success = rsaKey.LoadPemFile("qa_data/rsa/rsaPrivKey_pkcs8.pem") If (success <> 1) Then Response.Write "<pre>" & Server.HTMLEncode( rsaKey.LastErrorText) & "</pre>" Response.End End If ' To create the XML digital signature (i.e. embed the signature within ' the SOAP XML), we specify what is desired, and then call the method to ' create the XML signature. ' ' For example, the application must provide the following: ' - Where to put the signature. ' - What to sign. ' - The algorithms to be used. ' - The key to be used for signing. ' ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.XmlDSigGen") set xmlSigGen = Server.CreateObject("Chilkat.XmlDSigGen") ' In this example, we're going to put the signature within the wsse:Security element. ' To specify the location, set the SigLocation property to the XML path to this element, ' using vertical bar characters to separate tags. xmlSigGen.SigLocation = "SOAP-ENV:Envelope|SOAP-ENV:Header|wsse:Security" ' An XML digital signature contains one or more references. These are references to the parts ' of the XML document to be signed (a same document reference), or can be external references. ' This example will add a single same-document reference. We'll add a reference to the XML fragment ' at SOAP-ENV:Body, which is indicated by providing the value of the "ID" attribute (where "ID" is case ' insensitive). For each same-document reference, we must also indicate the hash algorithm and XML canonicalization ' algorithm to be used. For this example we'll choose SHA-256 and Exclusive XML Canonicalization. success = xmlSigGen.AddSameDocRef("Body","sha256","EXCL_C14N","","") ' Let's provide the RSA key to be used for signing: success = xmlSigGen.SetPrivateKey(rsaKey) ' We're leaving the following properties at their default values: ' ' - SigNamespacePrefix (default is "ds") ' - SigningAlg (for RSA keys. The default is PKCS1-v1_5, can be changed to RSASSA-PSS.) ' - SignedInfoCanonAlg (default is EXCL_C14N) ' - SignedInfoDigestMethod (default is sha256) ' - KeyInfoType (default is "KeyValue", where the RSA public key is included in the Signature) ' Note: Each Reference has it's own specified algorithms for XML canonicalization and hashing, ' and the actual signature part (the SignedInfo) has it's own algorithms for the same. ' They may or may not be the same. In this example, we use Exclusive XML Canonicalization and SHA-256 throughout. ' Finally, we're going to set one property that's optional, but commonly used. ' It's the SignedInfoPrefixList. In this case, we're using Exclusive Canonicalization, and the signature ' will be placed in a location within the XML document where namespace prefixes are used in the ancestors. ' Specifically, the "wsse" and "SOAP-ENV" namespace prefixes are used. xmlSigGen.SignedInfoPrefixList = "wsse SOAP-ENV" ' OK, everything's specified, so let's create the XML digital signature: ' This in-place signs the XML. If successful, sbSoapXml will contain the ' XML with the digital signature at the specified location. success = xmlSigGen.CreateXmlDSigSb(sbSoapXml) If (success <> 1) Then Response.Write "<pre>" & Server.HTMLEncode( xmlSigGen.LastErrorText) & "</pre>" Response.End End If ' Examine the signed SOAP XML: Response.Write "<pre>" & Server.HTMLEncode( sbSoapXml.GetAsString()) & "</pre>" ' This is the signed SOAP XML. ' Chilkat emits the Signature in compact form on a single line. Whitespace in XML signatures ' matters. Chilkat's opinion is that writing the Signature without whitespace minimizes the chance ' for problems with whatever software might be verifying the signature. ' <?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"><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="#Body"><ds:Transforms><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>OwgHPZNfDkXnZsjpfzXqAcT3RV3HzmTsEy2bP44FJ0M=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>C+7FWngUpJ33Q1yq8uuscjCyPN2IO4cJhpMv03Jrrht1V+4gvJQLIBk6HHjo1uPQyfYj6zji3pg+fOyGUptp17CsRvjCzSpP35vB2lEzHeS8dcY8XfrEtTP/0FNn75LmhhkOPy0wjWkgDVbgzhXpEk9az8r8fQVTM3vrcmXT+WdMWJXKBRFt6PLAhsFt0scOFTWAkLGyCwygzimDKX2nT63TOit9BigtIx7fPRuMkbybMKCGGABq2DiEbvrPOiN3SUYpyMNR9KehRAGN+OWnESaDC6DhOvbKR88XHkM+GeaRe9PWdrRHrwGfp3qgolKjR/wFRSa1YGSBKAhDJFBcdg==</ds:SignatureValue><ds:KeyInfo><ds:KeyValue><ds:RSAKeyValue><ds:Modulus>sXeRhM55P13FbpNcXAMR3olbw2Wa6keZIHu5YTZYUBTlYWId+pNiwUz3zFIEo+0IfYR0H27ybIycQO+1IIzJofUFNMAL3tZps2OKPlsjuCPls6kXpXhv/gvhux8LrCtp4PcKWqJ6QVOZKChc7WAx40qFWzHi57ueqRTv3x0kESqGg/VjsqyTEvb55psJO2RsfhLT7+YVh3hImRM3RDaJdkTkPuOxeFyT6N7VXD09329sLuS3QkUbE9zEKDnz9X3d8dEQdJhSI9ba5fxl8R7fu8pB67ElfzFml96X1jLFtzy1pzOT5Fc4ROcaqlYckVzdBq9sxezm6MYmDBjNAcibRw==</ds:Modulus><ds:Exponent>AQAB</ds:Exponent></ds:RSAKeyValue></ds:KeyValue></ds:KeyInfo></ds:Signature></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> ' Here's the signature part formatted for easier reading. ' (Adding whitespace to the SignedInfo breaks the signature, so you wouldn't want to do this..) ' <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="#Body"> ' <ds:Transforms> ' <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>OwgHPZNfDkXnZsjpfzXqAcT3RV3HzmTsEy2bP44FJ0M=</ds:DigestValue> ' </ds:Reference> ' </ds:SignedInfo> ' <ds:SignatureValue>C+7FWngUp....BKAhDJFBcdg==</ds:SignatureValue> ' <ds:KeyInfo> ' <ds:KeyValue> ' <ds:RSAKeyValue> ' <ds:Modulus>sXeRhM55P13FbpNcXAMR....MYmDBjNAcibRw==</ds:Modulus> ' <ds:Exponent>AQAB</ds:Exponent> ' </ds:RSAKeyValue> ' </ds:KeyValue> ' </ds:KeyInfo> ' </ds:Signature> %> </body> </html> |
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