[gnutls-devel] GnuTLS | Please prefer PFS ciphers over plain RSA ones. (#862)

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Thu Nov 21 17:27:32 CET 2019



sebastianas created an issue: https://gitlab.com/gnutls/gnutls/issues/862



## Description of problem:

Ciphers with priority normal prefer non-PFS cipher over PFS cipher. 

## Version of gnutls used:
3.6.10

## Distributor of gnutls (e.g., Ubuntu, Fedora, RHEL)
Debian

## How reproducible:

Steps to Reproduce:

 Connect to a server which supports TLS_RSA_AES_256_GCM_SHA384 and TLS_DHE_RSA_AES_256_GCM_SHA384 but has no server preference.


## Actual results:
Connections happens with TLS_RSA_AES_256_GCM_SHA384.

## Expected results:
Connections happens with TLS_DHE_RSA_AES_256_GCM_SHA384.

According to *gnutls-cli --list --priority NORMAL* the TLS_ECDHE_* cipher come before TLS_RSA_* but unfortunately the TLS_DHE_RSA_* cipher come last.

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