|
Chilkat • HOME • .NET Core C# • Android™ • AutoIt • C • C# • C++ • Chilkat2-Python • CkPython • Classic ASP • DataFlex • Delphi ActiveX • Delphi DLL • Go • Java • Lianja • Mono C# • Node.js • Objective-C • PHP ActiveX • PHP Extension • Perl • PowerBuilder • PowerShell • PureBasic • Ruby • SQL Server • Swift 2 • Swift 3,4,5... • Tcl • Unicode C • Unicode C++ • VB.NET • VBScript • Visual Basic 6.0 • Visual FoxPro • Xojo Plugin
(Unicode C) Create XML Digital Signature using a DSA KeyDemonstrates how to create an XML digital signature using a DSA key. This example requires Chilkat v9.5.0.69 or greater.
#include <C_CkHttpW.h> #include <C_CkStringBuilderW.h> #include <C_CkPrivateKeyW.h> #include <C_CkXmlDSigGenW.h> #include <C_CkXmlDSigW.h> void ChilkatSample(void) { const wchar_t *url; HCkHttpW http; HCkStringBuilderW sbXml; BOOL success; HCkPrivateKeyW dsaKey; HCkXmlDSigGenW xmlSigGen; HCkXmlDSigW verifier; BOOL bVerified; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // The XML to be signed in this example contains the following: // <?xml version="1.0" encoding="UTF-8" standalone="no"?> // <Envelope> // <Header> // <Security> // </Security> // </Header> // <Body Id="abc"> // <z:FooBar xmlns:z="https://www.example-code.com"/> // </Body> // </Envelope> // The above XML is available at https://www.chilkatsoft.com/exampleData/xmlToSign.xml // Fetch the XML and then sign it.. url = L"https://www.chilkatsoft.com/exampleData/xmlToSign.xml"; http = CkHttpW_Create(); sbXml = CkStringBuilderW_Create(); success = CkHttpW_QuickGetSb(http,url,sbXml); if (success != TRUE) { wprintf(L"%s\n",CkHttpW_lastErrorText(http)); CkHttpW_Dispose(http); CkStringBuilderW_Dispose(sbXml); return; } // This example uses a DSA private key for signing. // There are many ways of getting an DSA private key using Chilkat. This example // will load it from an encrypted PEM file. // In case you would like to use it, I put the DSA private key PEM file here: // https://www.chilkatsoft.com/exampleData/dsa1024_secret.zip // The password is "secret". dsaKey = CkPrivateKeyW_Create(); success = CkPrivateKeyW_LoadEncryptedPemFile(dsaKey,L"qa_data/dsa/dsa1024_secret.pem",L"secret"); if (success != TRUE) { wprintf(L"%s\n",CkPrivateKeyW_lastErrorText(dsaKey)); CkHttpW_Dispose(http); CkStringBuilderW_Dispose(sbXml); CkPrivateKeyW_Dispose(dsaKey); return; } // To create the XML digital signature (i.e. embed the signature within // the XML), first specify what is desired, 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. // xmlSigGen = CkXmlDSigGenW_Create(); // In this example, we're going to put the signature within the Security element. // To specify the location, set the SigLocation property to the XML path to this element, // using vertical bar characters to separate tags. CkXmlDSigGenW_putSigLocation(xmlSigGen,L"Envelope|Header|Security"); // An XML digital signature contains one or more references. These can be 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 Body, which is indicated by providing the value of the "ID" attribute (where "ID" is case // insensitive). In this case, we specify "abc" because Body has an Id="abc". // This causes the <Body> ... </Body> XML fragment to be signed. // // 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 SHA1 and Exclusive XML Canonicalization. CkXmlDSigGenW_AddSameDocRef(xmlSigGen,L"abc",L"sha1",L"EXCL_C14N",L"",L""); // Provide the DSA key to be used for signing: CkXmlDSigGenW_SetPrivateKey(xmlSigGen,dsaKey); // We're leaving the following properties at their default values: // // - SigNamespacePrefix (default is "ds") // - SignedInfoCanonAlg (default is EXCL_C14N) // - KeyInfoType (default is "KeyValue", where the DSA 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 hash/canonicalization algorithm. // They may or may not be the same. In this example, we use Exclusive XML Canonicalization and SHA1 throughout. // The default SignedInfoDigestMethod is sha256, which is a good choice. This example will // change it to sha1. CkXmlDSigGenW_putSignedInfoDigestMethod(xmlSigGen,L"sha1"); // OK, everything's specified, so let's create the XML digital signature: // This in-place signs the XML. If successful, sbXml will contain the // XML with the digital signature at the specified location. success = CkXmlDSigGenW_CreateXmlDSigSb(xmlSigGen,sbXml); if (success != TRUE) { wprintf(L"%s\n",CkXmlDSigGenW_lastErrorText(xmlSigGen)); CkHttpW_Dispose(http); CkStringBuilderW_Dispose(sbXml); CkPrivateKeyW_Dispose(dsaKey); CkXmlDSigGenW_Dispose(xmlSigGen); return; } // Examine the signed XML: wprintf(L"%s\n",CkStringBuilderW_getAsString(sbXml)); // Below is the signed XML that is produced. // 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"?> // <Envelope> // <Header> // <Security> // <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/2000/09/xmldsig#dsa-sha1"/><ds:Reference URI="#abc"><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>77X3L6odxTBow1W1dIiqZW1foow=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>Ci/KiAqoQLvNyK94n8TJwdJ6dVpIIy8tJg+9s8utmB92cW8lTd+U7g==</ds:SignatureValue><ds:KeyInfo><ds:KeyValue><ds:DSAKeyValue><ds:P>AN+Af9FvnqYl84Own8m/MHza9vVFEbpySOiWyeIM8diDjaES9i+UykaX9BGc0oaRJHtrHhe+gboMBGHfP+gYcgbqzeyVCi2kHghRD/TK7uI4jN8Yv8tfM6AO0QrDFfxFq4IV+qTZbSoCkbWaopQ+kEOY6B4btFxJ1YuE48mExMZ3</ds:P><ds:Q>AOCv5pwf4kvMW37Yzt0iH6URKOlD</ds:Q><ds:G>FO3eoDcpuU9Z25OQGFtC+M2ifczcKyRkFwTauGR3mIw0wePPiu3Ocr7A81SA8GQ9x3hWO5jyP//jL3jxYy8fgBg2RXwiic3nwT2rZfu50g6tPUpz1stKz/+Mxjulo6XuaMSOWwjU021IxVMzxQ1/L8QiwiIrwxvfQOaMY8HJgvw=</ds:G><ds:Y>JJmZQvWtrZ+Nb2YV47SfGAave8uOIedGlmg+CseoqKZC2aFcWM6kR0giUwQx834dhxQScRhqzxFxQPk/x+5hyG8LQbXW+BELmT1BiyodobYUAet4rSIt4EU4KU0iYw1drpcWT1jqI07l5xNi28heYSfSF5Odv2qwXxVKDSEeEkM=</ds:Y></ds:DSAKeyValue></ds:KeyValue></ds:KeyInfo></ds:Signature></Security> // </Header> // <Body Id="abc"> // <z:FooBar xmlns:z="https://www.example-code.com"/> // </Body> // </Envelope> // The above signed XML contains the DSA public key in the DSAKeyValue fragment (within the ds:KeyInfo). // The signature can easily be verified like this: verifier = CkXmlDSigW_Create(); // First load the XML containing the signature(s) to be verified. success = CkXmlDSigW_LoadSignatureSb(verifier,sbXml); if (success != TRUE) { wprintf(L"%s\n",CkXmlDSigW_lastErrorText(verifier)); CkHttpW_Dispose(http); CkStringBuilderW_Dispose(sbXml); CkPrivateKeyW_Dispose(dsaKey); CkXmlDSigGenW_Dispose(xmlSigGen); CkXmlDSigW_Dispose(verifier); return; } bVerified = CkXmlDSigW_VerifySignature(verifier,TRUE); if (bVerified != TRUE) { wprintf(L"%s\n",CkXmlDSigW_lastErrorText(verifier)); } wprintf(L"Signature verified = %d\n",bVerified); CkHttpW_Dispose(http); CkStringBuilderW_Dispose(sbXml); CkPrivateKeyW_Dispose(dsaKey); CkXmlDSigGenW_Dispose(xmlSigGen); CkXmlDSigW_Dispose(verifier); } |
|||||||
© 2000-2024 Chilkat Software, Inc. All Rights Reserved.