Set a Per-Recipient JWE Header

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetRecipientHeader, which sets the per-recipient unprotected header for a recipient index.

Background. Per-recipient headers carry recipient-specific values such as a key id (kid), and are used with the JSON serialization forms that support multiple recipients.

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    success := false

    jwe := chilkat.NewJwe()

    //  Protected header: AES key-wrap with AES-256-GCM content encryption.
    header := chilkat.NewJsonObject()
    header.UpdateString("alg","A256KW")
    header.UpdateString("enc","A256GCM")
    success = jwe.SetProtectedHeader(header)
    if success == false {
        fmt.Println(jwe.LastErrorText())
        jwe.DisposeJwe()
        header.DisposeJsonObject()
        return
    }

    //  The 256-bit key-wrapping key (base64) for recipient index 0.  In production, obtain the key from a
    //  secure source rather than hard-coding it.
    base64Key := "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
    success = jwe.SetWrappingKey(0,base64Key,"base64")
    if success == false {
        fmt.Println(jwe.LastErrorText())
        jwe.DisposeJwe()
        header.DisposeJsonObject()
        return
    }

    //  Set the per-recipient unprotected header for recipient 0, for example a key id used to identify
    //  which key a recipient should use.
    recipHeader := chilkat.NewJsonObject()
    recipHeader.UpdateString("kid","recipient-key-1")
    success = jwe.SetRecipientHeader(0,recipHeader)
    if success == false {
        fmt.Println(jwe.LastErrorText())
        jwe.DisposeJwe()
        header.DisposeJsonObject()
        recipHeader.DisposeJsonObject()
        return
    }

    sbContent := chilkat.NewStringBuilder()
    sbContent.Append("This is the secret content.")
    sbJwe := chilkat.NewStringBuilder()
    success = jwe.EncryptSb(sbContent,"utf-8",sbJwe)
    if success == false {
        fmt.Println(jwe.LastErrorText())
        jwe.DisposeJwe()
        header.DisposeJsonObject()
        recipHeader.DisposeJsonObject()
        sbContent.DisposeStringBuilder()
        sbJwe.DisposeStringBuilder()
        return
    }

    fmt.Println(*sbJwe.GetAsString())

    jwe.DisposeJwe()
    header.DisposeJsonObject()
    recipHeader.DisposeJsonObject()
    sbContent.DisposeStringBuilder()
    sbJwe.DisposeStringBuilder()