Swift

Create XML Signature using Java KeyStore (.jks)

See more XML Digital Signatures Examples

Demonstrates how to create an XML digital signature using a certificate and private key from a Java KeyStore (.jks) Swift

func chilkatTest() {
    var success: Bool = false

    // 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>
    // 

    // Build the XML to sign.
    // Use this online tool to generate the code from sample XML: 
    // Generate Code to Create XML

    let xml = CkoXml()!
    xml.tag = "SOAP-ENV:Envelope"
    xml.addAttribute(name: "xmlns:SOAP-ENV", value: "http://schemas.xmlsoap.org/soap/envelope/")
    xml.updateAttrAt(tagPath: "SOAP-ENV:Header|wsse:Security", autoCreate: true, attrName: "xmlns:wsse", attrValue: "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd")
    xml.updateAttrAt(tagPath: "SOAP-ENV:Header|wsse:Security", autoCreate: true, attrName: "SOAP-ENV:mustUnderstand", attrValue: "1")
    xml.updateAttrAt(tagPath: "SOAP-ENV:Body", autoCreate: true, attrName: "xmlns:SOAP-SEC", attrValue: "http://schemas.xmlsoap.org/soap/security/2000-12")
    xml.updateAttrAt(tagPath: "SOAP-ENV:Body", autoCreate: true, attrName: "SOAP-SEC:id", attrValue: "Body")
    xml.updateAttrAt(tagPath: "SOAP-ENV:Body|z:FooBar", autoCreate: true, attrName: "xmlns:z", attrValue: "http://example.com")

    // Load a JavaKeyStore file containing the certificate + private key.
    let jks = CkoJavaKeyStore()!
    var password: String? = "secret"
    success = jks.loadFile(password: password, path: "qa_data/jks/test_secret.jks")
    if success == false {
        print("\(jks.lastErrorText!)")
        return
    }

    // Make sure we have a private key.
    if jks.numPrivateKeys.intValue < 1 {
        print("No private key available.")
        return
    }

    // -------------------------------------------------------------------------
    // Get the certificate chain associated with the 1st (and probably only) private key in the JKS.

    let chain = CkoCertChain()!
    success = jks.certChain(at: 0, certChain: chain)
    if success == false {
        print("\(jks.lastErrorText!)")
        return
    }

    let cert = CkoCert()!
    success = chain.cert(at: 0, cert: cert)
    if success == false {
        print("\(chain.lastErrorText!)")
        return
    }

    // Verify again that this cert has a private key.
    if cert.hasPrivateKey() != true {
        print("Certificate has no associated private key.")
        return
    }

    // Prepare for signing...
    // Use this online tool to generate the following code from an already-signed XML sample: 
    // Generate Code to Create an XML Signature
    let gen = CkoXmlDSigGen()!

    // Indicate where the Signature will be inserted.
    gen.sigLocation = "SOAP-ENV:Envelope|SOAP-ENV:Header|wsse:Security"

    // Add a reference to the fragment of the XML to be signed.
    gen.addSameDocRef(id: "Body", digestMethod: "sha1", canonMethod: "EXCL_C14N", prefixList: "", refType: "")

    // (You can read about the SignedInfoPrefixList in the online reference documentation.  It's optional..)
    gen.signedInfoPrefixList = "wsse SOAP-ENV"

    // Provide the private key for signing via the certificate, and indicate that
    // we want the base64 of the certificate embedded in the KeyInfo.
    gen.keyInfoType = "X509Data"
    gen.x509Type = "Certificate"

    // Note: Because our certificate was loaded from a JKS which also contained the private key,
    // Chilkat automatically knows and has the private key associated with the certificate.
    // We set bUsePrivateKey to tell the SetX509Cert method to automatically use the private key
    // associated with the certificate for signing.
    var bUsePrivateKey: Bool = true
    success = gen.setX509Cert(cert: cert, usePrivateKey: bUsePrivateKey)
    if success != true {
        print("\(gen.lastErrorText!)")
        return
    }

    // Everything's specified.  Now create and insert the Signature
    let sbXml = CkoStringBuilder()!
    xml.getSb(sb: sbXml)
    success = gen.createXmlDSigSb(sbXml: sbXml)
    if success == false {
        print("\(gen.lastErrorText!)")
        return
    }

    // Examine the XML with the digital signature inserted
    print("\(sbXml.getAsString()!)")

}