[gnutls-devel] GnuTLS | record_size_limit extension (!733)

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Mon Aug 20 10:33:08 CEST 2018


Daiki Ueno commented on a discussion on tests/tls13/prf.c:

>  	} \
>  	}
>  
> -#define KEY_EXP_VALUE "\x2b\x6f\x94\xc8\xbc\xa0\x59\x4b\x61\xc8\x23\x12\x01\x8e\xb2\x3a\xdf\x48\x06\x98\x96\xaf\xf9\xe7\xcf\xd5\xa4\x56\x29\x6b\x84\xd3\xfc\x81"
> -#define HELLO_VALUE "\x93\x78\x2d\x00\x88\x02\xd8\xd1\x75\xfe\x1d\xae\x99\x13\xf4\x36\xe0\x10\xc9\xfc\xae\xb8\xc0\x72\xd2\x99\x6e\xc3\x71\xf5\x1b"
> -#define CONTEXT_VALUE "\x1e\x95\x2e\xa5\xb9\xff\xe4\xb0\xbe\xa3\x8b\x1f\x6c\x31\x74\x62\x4f\x9d\x0b\xf8\x1d\x5f\x3d\xa5\xa7\x45\x07\x99\xea\xfc\xa2"
> -#define NULL_CONTEXT_VALUE "\x2f\x7e\x07\x52\xd4\x23\x0b\x7a\xa0\x7e\x2f\xad\xb5\xcc\xcf\x63\x8f\x6c\x27\x7e\xbb\x9e\xb8\xd3\xa0\x92\x3d\xd0\xaa\xe4\xb0"
> +#define KEY_EXP_VALUE "\x42\xba\x1d\x14\x6d\x09\x4f\x64\x7a\x65\xc0\x39\xf8\xd6\x98\xa7\x71\xcd\xb5\xd1\x8d\xf7\x70\xca\x22\x2d\xad\x3f\xac\x47\xe9\x13\xfa\xd0"

The RFC suggests to send this extension always:
```
   Endpoints SHOULD advertise the "record_size_limit" extension, even if
   they have no need to limit the size of records.  For clients, this
   allows servers to advertise a limit at their discretion.  For
   servers, this allows clients to know that their limit will be
   respected.
```

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