Hi,

sorry for reviving an old discussion.

On 11/03/2014 13:02, Nikos Mavrogiannopoulos wrote:
>  Actually I was wrong in allowing them. SSL 3.0 uses a special MAC
> construction that isn't defined for SHA256 or better, and there is no
> authority to extend that definition. I'll revert that choice on the
> next bug fix release.
> 
I'm afraid you forgot to change back the minimum version to TLS 1.0 for some
ciphersuites using SHA-2 :

% gnutls-cli --version | head -n 1
gnutls-cli 3.3.5
% gnutls-cli --priority EXPORT:+NULL:+MD5:+PSK:+DHE-PSK:+ECDHE-PSK:+RSA-PSK
--list | grep 'SHA[23].*SSL3'
TLS_RSA_NULL_SHA256                                     0x00, 0x3b      SSL3.0
TLS_DHE_DSS_CAMELLIA_256_CBC_SHA256                     0x00, 0xc3      SSL3.0
TLS_PSK_NULL_SHA256                                     0x00, 0xb0      SSL3.0
TLS_PSK_NULL_SHA384                                     0x00, 0xb1      SSL3.0
TLS_DHE_PSK_NULL_SHA256                                 0x00, 0xb4      SSL3.0
TLS_DHE_PSK_NULL_SHA384                                 0x00, 0xb5      SSL3.0
TLS_ECDHE_PSK_NULL_SHA256                               0xc0, 0x3a      SSL3.0
TLS_ECDHE_PSK_NULL_SHA384                               0xc0, 0x3b      SSL3.0
TLS_RSA_PSK_NULL_SHA256                                 0x00, 0xb8      SSL3.0
TLS_RSA_PSK_NULL_SHA384                                 0x00, 0xb9      SSL3.0

(I'm not claiming the above list is complete.)

Regards,
Manuel.

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