[Pkg-openssl-devel] Bug#1011076: libssl3, mercurial: can't connect to server created with `openssl s_server -tls1`

[Julien Cristau]

Package: libssl3,mercurial
Severity: normal
X-Debbugs-Cc: jcristau at debian.org

Hi,

mercurial's test suite no longer passes in sid, with:

> --- /<<PKGBUILDDIR>>/tests/test-https.t
> +++ /<<PKGBUILDDIR>>/tests/test-https.t.err
> @@ -362,9 +362,11 @@
>  Clients talking same TLS versions work
> 
>    $ P="$CERTSDIR" hg --config hostsecurity.minimumprotocol=tls1.0 --config hostsecurity.ciphers=DEFAULT id https://localhost:$HGPORT/
> -  5fed3813f7f5
> +  abort: error: [SSL: TLSV1_ALERT_INTERNAL_ERROR] tlsv1 alert internal error (_ssl.c:997)
> +  [100]
>    $ P="$CERTSDIR" hg --config hostsecurity.minimumprotocol=tls1.1 --config hostsecurity.ciphers=DEFAULT id https://localhost:$HGPORT1/
> -  5fed3813f7f5
> +  abort: error: [SSL: TLSV1_ALERT_INTERNAL_ERROR] tlsv1 alert internal error (_ssl.c:997)
> +  [100]
>    $ P="$CERTSDIR" hg --config hostsecurity.minimumprotocol=tls1.2 id https://localhost:$HGPORT2/
>    5fed3813f7f5
> 
> @@ -399,8 +401,8 @@
>  --insecure will allow TLS 1.0 connections and override configs
> 
>    $ hg --config hostsecurity.minimumprotocol=tls1.2 id --insecure https://localhost:$HGPORT1/
> -  warning: connection security to localhost is disabled per current settings; communication is susceptible to eavesdropping and tampering
> -  5fed3813f7f5
> +  abort: error: [SSL: TLSV1_ALERT_INTERNAL_ERROR] tlsv1 alert internal error (_ssl.c:997)
> +  [100]
> 
>  The per-host config option overrides the default
> 
> @@ -408,7 +410,8 @@
>    > --config hostsecurity.ciphers=DEFAULT \
>    > --config hostsecurity.minimumprotocol=tls1.2 \
>    > --config hostsecurity.localhost:minimumprotocol=tls1.0
> -  5fed3813f7f5
> +  abort: error: [SSL: TLSV1_ALERT_INTERNAL_ERROR] tlsv1 alert internal error (_ssl.c:997)
> +  [100]
> 
>  The per-host config option by itself works
> 
> 
> ERROR: test-https.t output changed

The failures happen in parts of the test that spin up and attempt to
connect to a TLS1.0 or TLS1.1 server.  It used to pass on 1.1.1n and (I
think) 1.1.1o.

Trying to replicate with openssl's cmdline tools, e.g.:
  openssl s_server -cert tests/sslcerts/pub.pem -key tests/sslcerts/priv.pem -tls1

and
  openssl s_client -connect localhost:4433 -tls1

The server reports:
4084745F427F0000:error:0A000076:SSL routines:tls_choose_sigalg:no suitable signature algorithm:../ssl/t1_lib.c:3331:

Talking with Sebastian on IRC he suggested some extra -cipher /
-provider command line options which didn't seem to make a difference.

I guess I have two questions:
- is this a bug or an intended change?
- if it's intended, is there a way to allow these connections again?

Thanks,
Julien