Encrypt StringBuilder Content to a JWE

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.EncryptSb, which encrypts content supplied in a StringBuilder and writes the resulting JWE into another StringBuilder.

Background. JWE (JSON Web Encryption) protects content with a content-encryption algorithm (the header enc value) while the content-encryption key is managed by the key-management algorithm (the header alg value). This example uses AES key wrapping with a symmetric wrapping key.

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    success := false

    jwe := chilkat.NewJwe()

    //  Set the JWE protected header, specifying the key-management algorithm (alg) and the content-
    //  encryption algorithm (enc).
    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
    }

    //  Encrypt content supplied in a StringBuilder, writing the resulting JWE into another StringBuilder.
    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()
        sbContent.DisposeStringBuilder()
        sbJwe.DisposeStringBuilder()
        return
    }

    fmt.Println(*sbJwe.GetAsString())

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