Decryption failed on different cipher key per PubNub instance

[akuzminskyi]

Hi,
There is probably another issue. if there are multiple instances of PubNub with different encryption/decryption keys(cipher key), messages on the second instance of PubNub are not decryptable - looks like it is using one cryptoModule/key for for all instances. But each channel can have unique encryption/decryption keys.

func makePubNub(cryptoKey: String, subscriptionKey: String) -> PubNub {
          let cryptoModule = CryptoModule.aesCbcCryptoModule(
            with: cryptoKey,
            withRandomIV: false
        )
        let configuration = PubNubConfiguration(
            publishKey: nil,
            subscribeKey: subscriptionKey,
            userId: clientIdentifier(),
            cryptoModule: cryptoModule
        )
        return PubNub(configuration: configuration)
}

let pubNub1 =  makePubNub(cryptoKey: "keyForChannel_1", subscriptionKey: ".....")
// addListener pubNub1
pubNub1.subscribe(to: "channel_1")
// send a message to channel_1
// The message will be successfully parsed/decrypted

let pubNub2 =  makePubNub(cryptoKey: "keyForChannel_2", subscriptionKey: ".....")
// addListener to pubNub2
pubNub2.subscribe(to: "channel_2")
// send a message to channel_1
// The `channel_1` message will be successfully parsed/decrypted
// send a message to channel_2
// The `channel_2` message will failed on decryption.

Also in logs, it will be;

[Warn 2024-03-13T15:11:30.905Z (com.apple.main-thread#Thread.Main) {SubscribeRouter.decrypt(_:message:)#133}] Subscribe message failed to decrypt due to Failure to perform decryption: Cannot create String from provided Data

The message: PubNubMessageBase will have error:

▿ PubNubMessageBase
  - publisher : nil
  - channel : "uk.order.edeedxl1zuafgmaxg459oq"
  ▿ subscription : Optional<String>
    - some : "uk.order.edeedxl1zuafgmaxg459oq"
  - published : 17103427589802006
  - messageType : PubNub.PubNubMessageType.message
  ▿ error : Optional<PubNubError>
    ▿ some : Failure to perform decryption: Cannot create String from provided Data
      - reason : Failure to perform decryption
      ▿ details : 1 element
        - 0 : "Cannot create String from provided Data"
      - underlying : nil
      - coorelation : 0 elements
      - affected : 0 elements
      - router : nil
      - domain : "PubNub"
  ▿ concretePayload : 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
    ▿ value : AnyJSONType
      - string : "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"
  - concreteMessageActions : 0 elements
  - concreteMetadata : nil

I checked on 6.2.3 and 7.0.0 SDK.

[jguz-pubnub]

Hi @akuzminskyi,

This is related to the issue you mentioned before. My initial assumption is that CryptoModule has insufficient implementation for computing a hash value. I will investigate it and let you know.

[akuzminskyi]

I can confirm the issue is not happening anymore in 7.1.0 for me.