public VaspMessage extractSignedMessage()

in src/main/java/org/openvasp/client/service/impl/SignServiceBaseImpl.java [42:66]

18 lines of code
2 McCabe index (conditional complexity)


    public VaspMessage extractSignedMessage(@NonNull final String whisperPayload) {
        val payload = StringUtils.left(whisperPayload, whisperPayload.length() - signatureLength());

        val json = hexStrDecode(payload);
        log.debug("RECEIVE: {}", json);

        val signature = StringUtils.right(whisperPayload, signatureLength());

        val message = VaspMessage.fromJson(json);
        message.validate();

        val senderContractAddress = vaspIdentityService.resolveSenderVaspId(message)
                .orElseThrow(() -> new VaspValidationException(message, "Sender's VASP ID cannot be resolved"));

        val senderContract = contractService.getVaspContractInfo(senderContractAddress);
        val publicSigningKey = senderContract.getSigningKey();

        if (!verifySign(payload, signature, publicSigningKey)) {
            throw new VaspValidationException(
                    message,
                    "Invalid signature for incoming message");
        }

        return message;
    }