100 lines
4.9 KiB
Diff
100 lines
4.9 KiB
Diff
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--- lib/IO/Socket/SSL.pm
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+++ lib/IO/Socket/SSL.pm
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@@ -172,11 +172,10 @@ my %DEFAULT_SSL_ARGS = (
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SSL_npn_protocols => undef, # meaning depends whether on server or client side
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SSL_alpn_protocols => undef, # list of protocols we'll accept/send, for example ['http/1.1','spdy/3.1']
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- # https://wiki.mozilla.org/Security/Server_Side_TLS, 2019/03/05
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- # "Old backward compatibility" for best compatibility
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- # .. "Most ciphers that are not clearly broken and dangerous to use are supported"
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- # slightly reordered to prefer AES since it is cheaper when hardware accelerated
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- SSL_cipher_list => 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:ECDHE-RSA-DES-CBC3-SHA:ECDHE-ECDSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:DES-CBC3-SHA:HIGH:SEED:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!RSAPSK:!aDH:!aECDH:!EDH-DSS-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA:!SRP',
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+ # Use system-wide default cipher list to support use of system-wide
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+ # crypto policy (#1076390, #1127577, CPAN RT#97816)
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+ # https://fedoraproject.org/wiki/Changes/CryptoPolicy
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+ SSL_cipher_list => 'PROFILE=SYSTEM',
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);
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my %DEFAULT_SSL_CLIENT_ARGS = (
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@@ -186,63 +185,6 @@ my %DEFAULT_SSL_CLIENT_ARGS = (
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SSL_ca_file => undef,
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SSL_ca_path => undef,
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- # older versions of F5 BIG-IP hang when getting SSL client hello >255 bytes
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- # http://support.f5.com/kb/en-us/solutions/public/13000/000/sol13037.html
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- # http://guest:guest@rt.openssl.org/Ticket/Display.html?id=2771
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- # Ubuntu worked around this by disabling TLSv1_2 on the client side for
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- # a while. Later a padding extension was added to OpenSSL to work around
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- # broken F5 but then IronPort croaked because it did not understand this
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- # extension so it was disabled again :(
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- # Firefox, Chrome and IE11 use TLSv1_2 but use only a few ciphers, so
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- # that packet stays small enough. We try the same here.
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-
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- SSL_cipher_list => join(" ",
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-
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- # SSLabs report for Chrome 48/OSX.
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- # This also includes the fewer ciphers Firefox uses.
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- 'ECDHE-ECDSA-AES128-GCM-SHA256',
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- 'ECDHE-RSA-AES128-GCM-SHA256',
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- 'DHE-RSA-AES128-GCM-SHA256',
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- 'ECDHE-ECDSA-CHACHA20-POLY1305',
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- 'ECDHE-RSA-CHACHA20-POLY1305',
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- 'ECDHE-ECDSA-AES256-SHA',
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- 'ECDHE-RSA-AES256-SHA',
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- 'DHE-RSA-AES256-SHA',
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- 'ECDHE-ECDSA-AES128-SHA',
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- 'ECDHE-RSA-AES128-SHA',
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- 'DHE-RSA-AES128-SHA',
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- 'AES128-GCM-SHA256',
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- 'AES256-SHA',
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- 'AES128-SHA',
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- 'DES-CBC3-SHA',
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-
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- # IE11/Edge has some more ciphers, notably SHA384 and DSS
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- # we don't offer the *-AES128-SHA256 and *-AES256-SHA384 non-GCM
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- # ciphers IE/Edge offers because they look like a large mismatch
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- # between a very strong HMAC and a comparably weak (but sufficient)
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- # encryption. Similar all browsers which do SHA384 can do ECDHE
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- # so skip the DHE*SHA384 ciphers.
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- 'ECDHE-RSA-AES256-GCM-SHA384',
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- 'ECDHE-ECDSA-AES256-GCM-SHA384',
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- # 'ECDHE-RSA-AES256-SHA384',
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- # 'ECDHE-ECDSA-AES256-SHA384',
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- # 'ECDHE-RSA-AES128-SHA256',
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- # 'ECDHE-ECDSA-AES128-SHA256',
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- # 'DHE-RSA-AES256-GCM-SHA384',
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- # 'AES256-GCM-SHA384',
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- 'AES256-SHA256',
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- # 'AES128-SHA256',
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- 'DHE-DSS-AES256-SHA256',
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- # 'DHE-DSS-AES128-SHA256',
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- 'DHE-DSS-AES256-SHA',
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- 'DHE-DSS-AES128-SHA',
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- 'EDH-DSS-DES-CBC3-SHA',
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-
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- # Just to make sure, that we don't accidentally add bad ciphers above.
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- # This includes dropping RC4 which is no longer supported by modern
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- # browsers and also excluded in the SSL libraries of Python and Ruby.
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- "!EXP !MEDIUM !LOW !eNULL !aNULL !RC4 !DES !MD5 !PSK !SRP"
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- )
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);
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# set values inside _init to work with perlcc, RT#95452
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--- lib/IO/Socket/SSL.pod
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+++ lib/IO/Socket/SSL.pod
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@@ -1054,12 +1054,8 @@ documentation (L<http://www.openssl.org/
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for more details.
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Unless you fail to contact your peer because of no shared ciphers it is
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-recommended to leave this option at the default setting. The default setting
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-prefers ciphers with forward secrecy, disables anonymous authentication and
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-disables known insecure ciphers like MD5, DES etc. This gives a grade A result
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-at the tests of SSL Labs.
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-To use the less secure OpenSSL builtin default (whatever this is) set
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-SSL_cipher_list to ''.
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+recommended to leave this option at the default setting, which honors the
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+system-wide PROFILE=SYSTEM cipher list.
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In case different cipher lists are needed for different SNI hosts a hash can be
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given with the host as key and the cipher suite as value, similar to
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