Hash, Salt and beyond

General
1

Hi all!

I need to generate a Hash with these procedure:

  1. The algorithm will be AES (that's not a problem).
  2. Method AES/CBC/PKCS5PADDING
  3. HASH in SHA-512

The first three points will be covered with a node.

But here comes the complex....additional the process will be the following:

  1. The Salt will be dinamic and random.
  2. Next to the Salt i need to apply a derivation process with a Hash 123WithHmac233
  3. The point 2 needs to be returned in HEX or Base64

I found it difficult to do it in node red, specially the SALT part.

Thanks a lot in advance.

Regards!

2

What library are you using to do this? And what have you tried?

I'd use a suitable library and a function node myself.

3

Hi.

I'cant use any library at all because i have to do it in a prod server, so no additional npm install can be done.

I know that the SALT is used in addition to the HASH and it can be placed in the first part or the last one of the HASH.

Tks!

4

Urm, you should never do crypto without a tried and trusted library. Rule number one: never do it yourself.

2 Likes
5

Yes that is right.
I know there is a well used library called 'cripto'.

Regards!

6

Can't you use the crypto library built in to nodejs?

On the setup tab of a function node, add an import named crypto then in the on message tab...

const salt = crypto.randomBytes(256).toString('base64');
//Do what you need to with salt then return the result...
msg.payload = result
return msg;
7

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