(Go) Sign Manifest File to Generate a Passbook .pkpass file

Demonstrates how to create a Passbook .pkpass archive by creating a signature of a manifest file and then zipping to a .pkpass archive.

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    // Note: Requires Chilkat v9.5.0.75 or greater.

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // ---------------------------------------------------------------------------------------------
    // Note: Chilkat also has the capability to do everything in-memory (no files would be involved).  
    // See this example:  Sign Manifest File to Generate a Passbook .pkpass in Memory
    // ---------------------------------------------------------------------------------------------

    // First create the manifest.json
    var success bool
    manifest := chilkat.NewJsonObject()
    crypt := chilkat.NewCrypt2()

    zip := chilkat.NewZip()
    zip.NewZip("qa_data/p7s/pass-wallet/example.pkpass")
    // Set the AppendFromDir property to prevent that relative paths from being stored in the .pkpass archive.
    zip.SetAppendFromDir("qa_data/p7s/pass-wallet/")

    crypt.SetHashAlgorithm("sha1")
    // Return hashes as lowercase hex.
    crypt.SetEncodingMode("hexlower")

    var fileHash *string = new(string)
    var filePath string
    filePath = "qa_data/p7s/pass-wallet/icon.png"
    fileHash = crypt.HashFileENC(filePath)
    zip.AppendOneFileOrDir("icon.png",false)
    manifest.UpdateString("\"icon.png\"",*fileHash)

    filePath = "qa_data/p7s/pass-wallet/icon@2x.png"
    fileHash = crypt.HashFileENC(filePath)
    zip.AppendOneFileOrDir("icon@2x.png",false)
    manifest.UpdateString("\"icon@2x.png\"",*fileHash)

    filePath = "qa_data/p7s/pass-wallet/logo.png"
    fileHash = crypt.HashFileENC(filePath)
    zip.AppendOneFileOrDir("logo.png",false)
    manifest.UpdateString("\"logo.png\"",*fileHash)

    filePath = "qa_data/p7s/pass-wallet/logo@2x.png"
    fileHash = crypt.HashFileENC(filePath)
    zip.AppendOneFileOrDir("logo@2x.png",false)
    manifest.UpdateString("\"logo@2x.png\"",*fileHash)

    filePath = "qa_data/p7s/pass-wallet/pass.json"
    fileHash = crypt.HashFileENC(filePath)
    zip.AppendOneFileOrDir("pass.json",false)
    manifest.UpdateString("\"pass.json\"",*fileHash)

    sbJson := chilkat.NewStringBuilder()
    manifest.EmitSb(sbJson)
    manifestPath := "qa_data/p7s/pass-wallet/manifest.json"
    sbJson.WriteFile(manifestPath,"utf-8",false)
    zip.AppendOneFileOrDir("manifest.json",false)

    // Make sure we have the Apple WWDR intermediate certificate available for 
    // the cert chain in the signature.
    certVault := chilkat.NewXmlCertVault()
    appleWwdrCert := chilkat.NewCert()
    success = appleWwdrCert.LoadByCommonName("Apple Worldwide Developer Relations Certification Authority")
    if success != true {
        fmt.Println("The Apple WWDR intermediate certificate is not installed.")
        fmt.Println("It is available at https://developer.apple.com/certificationauthority/AppleWWDRCA.cer")
        fmt.Println("You may alternatively load the .cer like this...")
        success = appleWwdrCert.LoadFromFile("qa_data/certs/AppleWWDRCA.cer")
        if success != true {
            fmt.Println(appleWwdrCert.LastErrorText())
            manifest.DisposeJsonObject()
            crypt.DisposeCrypt2()
            zip.DisposeZip()
            sbJson.DisposeStringBuilder()
            certVault.DisposeXmlCertVault()
            appleWwdrCert.DisposeCert()
            return
        }

    }

    certVault.AddCert(appleWwdrCert)
    crypt.UseCertVault(certVault)

    // Use a digital certificate and private key from a PFX file (.pfx or .p12).
    pfxPath := "qa_data/pfx/cert_test123.pfx"
    pfxPassword := "test123"

    cert := chilkat.NewCert()
    success = cert.LoadPfxFile(pfxPath,pfxPassword)
    if success != true {
        fmt.Println(cert.LastErrorText())
        manifest.DisposeJsonObject()
        crypt.DisposeCrypt2()
        zip.DisposeZip()
        sbJson.DisposeStringBuilder()
        certVault.DisposeXmlCertVault()
        appleWwdrCert.DisposeCert()
        cert.DisposeCert()
        return
    }

    // Provide the signing cert (with associated private key).
    success = crypt.SetSigningCert(cert)
    if success != true {
        fmt.Println(crypt.LastErrorText())
        manifest.DisposeJsonObject()
        crypt.DisposeCrypt2()
        zip.DisposeZip()
        sbJson.DisposeStringBuilder()
        certVault.DisposeXmlCertVault()
        appleWwdrCert.DisposeCert()
        cert.DisposeCert()
        return
    }

    // Specify the signed attributes to be included.
    // (These attributes appear to not be necessary, but we're including
    // them just in case they become necessary in the future.)
    jsonSignedAttrs := chilkat.NewJsonObject()
    jsonSignedAttrs.UpdateInt("contentType",1)
    jsonSignedAttrs.UpdateInt("signingTime",1)
    crypt.SetSigningAttributes(jsonSignedAttrs.Emit())

    // Sign the manifest JSON file to produce a file named "signature".
    sigPath := "qa_data/p7s/pass-wallet/signature"

    // Create the "signature" file.
    success = crypt.CreateP7S(manifestPath,sigPath)
    if success == false {
        fmt.Println(crypt.LastErrorText())
        manifest.DisposeJsonObject()
        crypt.DisposeCrypt2()
        zip.DisposeZip()
        sbJson.DisposeStringBuilder()
        certVault.DisposeXmlCertVault()
        appleWwdrCert.DisposeCert()
        cert.DisposeCert()
        jsonSignedAttrs.DisposeJsonObject()
        return
    }

    zip.AppendOneFileOrDir("signature",false)

    // ---------------------------------------------------------------------------------------------
    // Note: Chilkat also has the capability to do everything in-memory (no files would be involved).  
    // If this is of interest, please send email to support@chilkatsoft.com
    // ---------------------------------------------------------------------------------------------

    // Create the .pkipass archive (which is a .zip archive containing the required files).
    success = zip.WriteZipAndClose()
    if success != true {
        fmt.Println(zip.LastErrorText())
        manifest.DisposeJsonObject()
        crypt.DisposeCrypt2()
        zip.DisposeZip()
        sbJson.DisposeStringBuilder()
        certVault.DisposeXmlCertVault()
        appleWwdrCert.DisposeCert()
        cert.DisposeCert()
        jsonSignedAttrs.DisposeJsonObject()
        return
    }

    fmt.Println("Success.")

    manifest.DisposeJsonObject()
    crypt.DisposeCrypt2()
    zip.DisposeZip()
    sbJson.DisposeStringBuilder()
    certVault.DisposeXmlCertVault()
    appleWwdrCert.DisposeCert()
    cert.DisposeCert()
    jsonSignedAttrs.DisposeJsonObject()