Hi,
Hooray! I was finally able to do this. Thanks a lot :) I think I'll make up
the code and release it later~
On Tuesday, June 10, 2014 4:57:33 PM UTC+3, Kay Röpke wrote:
>
> Hi!
>
> I believe this is the Play framework signing the entire cookie.
> The relevant code looks like:
> /**
> * Signs the given String with HMAC-SHA1 using the application’s secret
> key.
> *
> * By default this uses the platform default JSSE provider. This
> can be overridden by defining
> * `application.crypto.provider` in `application.conf`.
> *
> * @param message The message to sign.
> * @return A hexadecimal encoded signature.
> */
> def sign(message: String): String = {
> secret.map(secret => sign(message,
> secret.getBytes("utf-8"))).getOrElse {
> throw new PlayException("Configuration error", "Missing
> application.secret")
> }
> }
>
> /**
> * Signs the given String with HMAC-SHA1 using the given key.
> *
> * By default this uses the platform default JSSE provider. This
> can be overridden by defining
> * `application.crypto.provider` in `application.conf`.
> *
> * @param message The message to sign.
> * @param key The private key to sign with.
> * @return A hexadecimal encoded signature.
> */
> def sign(message: String, key: Array[Byte]): String = {
> val mac = provider.map(p => Mac.getInstance("HmacSHA1",
> p)).getOrElse(Mac.getInstance("HmacSHA1"))
> mac.init(new SecretKeySpec(key, "HmacSHA1"))
> Codecs.toHexString(mac.doFinal(message.getBytes("utf-8")))
> }
>
> So you should be able to take the application.secret, use that as the
> HmacSHA1 secret, sign the entire cookie value (incl. the cookie name
> and '=') and prepend the sha + '-'.
>
> What I couldn't find the code for right away is how the cookie value
> is generated if it is a map. But I think that's not relevant here.
>
> Hope that helps!
>
> Kay
>
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