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(SQL Server) Create XML Signature with Certificate's Private KeyDemonstrates how to create an XML digital signature using a certificate's RSA private key. This example loads the certificate from a PFX, and uses the cert's associated private key to sign. The public key is embedded in the XML signature as a ds:KeyInfo / ds:KeyValue / dsRSAKeyValue element. This example requires Chilkat v9.5.0.71 or greater.
-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls. -- CREATE PROCEDURE ChilkatSample AS BEGIN DECLARE @hr int DECLARE @iTmp0 int -- Important: Do not use nvarchar(max). See the warning about using nvarchar(max). DECLARE @sTmp0 nvarchar(4000) -- 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.. DECLARE @url nvarchar(4000) SELECT @url = 'https://www.chilkatsoft.com/exampleData/soapToSign.xml' DECLARE @http int -- Use "Chilkat_9_5_0.Http" for versions of Chilkat < 10.0.0 EXEC @hr = sp_OACreate 'Chilkat.Http', @http OUT IF @hr <> 0 BEGIN PRINT 'Failed to create ActiveX component' RETURN END DECLARE @sbSoapXml int -- Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0 EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbSoapXml OUT DECLARE @success int EXEC sp_OAMethod @http, 'QuickGetSb', @success OUT, @url, @sbSoapXml IF @success <> 1 BEGIN EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT PRINT @sTmp0 EXEC @hr = sp_OADestroy @http EXEC @hr = sp_OADestroy @sbSoapXml RETURN END -- Load a PFX file containing the certificate + private key. DECLARE @cert int -- Use "Chilkat_9_5_0.Cert" for versions of Chilkat < 10.0.0 EXEC @hr = sp_OACreate 'Chilkat.Cert', @cert OUT EXEC sp_OAMethod @cert, 'LoadPfxFile', @success OUT, '/somedir/myPfx.pfx', 'pfx_password' IF @success <> 1 BEGIN EXEC sp_OAGetProperty @cert, 'LastErrorText', @sTmp0 OUT PRINT @sTmp0 EXEC @hr = sp_OADestroy @http EXEC @hr = sp_OADestroy @sbSoapXml EXEC @hr = sp_OADestroy @cert RETURN END -- Get the RSA private key for signing... DECLARE @rsaKey int EXEC sp_OAMethod @cert, 'ExportPrivateKey', @rsaKey OUT EXEC sp_OAGetProperty @cert, 'LastMethodSuccess', @iTmp0 OUT IF @iTmp0 <> 1 BEGIN EXEC sp_OAGetProperty @cert, 'LastErrorText', @sTmp0 OUT PRINT @sTmp0 EXEC @hr = sp_OADestroy @http EXEC @hr = sp_OADestroy @sbSoapXml EXEC @hr = sp_OADestroy @cert RETURN END -- 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. -- DECLARE @xmlSigGen int -- Use "Chilkat_9_5_0.XmlDSigGen" for versions of Chilkat < 10.0.0 EXEC @hr = sp_OACreate 'Chilkat.XmlDSigGen', @xmlSigGen OUT -- 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. EXEC sp_OASetProperty @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. EXEC sp_OAMethod @xmlSigGen, 'AddSameDocRef', @success OUT, 'Body', 'sha256', 'EXCL_C14N', '', '' -- Let's provide the RSA key to be used for signing: EXEC sp_OAMethod @xmlSigGen, 'SetPrivateKey', @success OUT, @rsaKey EXEC @hr = sp_OADestroy @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. EXEC sp_OASetProperty @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. EXEC sp_OAMethod @xmlSigGen, 'CreateXmlDSigSb', @success OUT, @sbSoapXml IF @success <> 1 BEGIN EXEC sp_OAGetProperty @xmlSigGen, 'LastErrorText', @sTmp0 OUT PRINT @sTmp0 EXEC @hr = sp_OADestroy @http EXEC @hr = sp_OADestroy @sbSoapXml EXEC @hr = sp_OADestroy @cert EXEC @hr = sp_OADestroy @xmlSigGen RETURN END -- Examine the signed SOAP XML: EXEC sp_OAMethod @sbSoapXml, 'GetAsString', @sTmp0 OUT PRINT @sTmp0 -- 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> EXEC @hr = sp_OADestroy @http EXEC @hr = sp_OADestroy @sbSoapXml EXEC @hr = sp_OADestroy @cert EXEC @hr = sp_OADestroy @xmlSigGen END GO |
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