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Fix SSL tests scripts with recent OpenSSL server with Diffie-Hellman

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Our interoperability tests fail with a recent OpenSSL server. The
reason is that they force 1024-bit Diffie-Hellman parameters, which
recent OpenSSL (e.g. 1.1.1f on Ubuntu 20.04) reject:
```
140072814650688:error:1408518A:SSL routines:ssl3_ctx_ctrl:dh key too small:../ssl/s3_lib.c:3782:
```

We've been passing custom DH parameters since
6195767554 because OpenSSL <=1.0.2a
requires it. This is only concerns the version we use as
OPENSSL_LEGACY. So only use custom DH parameters for that version. In
compat.sh, use it based on the observed version of $OPENSSL_CMD.

This way, ssl-opt.sh and compat.sh work (barring other issues) for all
our reference versions of OpenSSL as well as for a modern system OpenSSL.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2021-04-01 14:00:11 +02:00
parent e93095fe6b
commit 3aec89b8c2
2 changed files with 15 additions and 2 deletions
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15
tests/compat.sh
View file

@ -905,10 +905,23 @@ setup_arguments()
fi fi
M_SERVER_ARGS="server_port=$PORT server_addr=0.0.0.0 force_version=$MODE arc4=1" M_SERVER_ARGS="server_port=$PORT server_addr=0.0.0.0 force_version=$MODE arc4=1"
O_SERVER_ARGS="-accept $PORT -cipher NULL,ALL -$MODE -dhparam data_files/dhparams.pem" O_SERVER_ARGS="-accept $PORT -cipher NULL,ALL -$MODE"
G_SERVER_ARGS="-p $PORT --http $G_MODE" G_SERVER_ARGS="-p $PORT --http $G_MODE"
G_SERVER_PRIO="NORMAL:${G_PRIO_CCM}+ARCFOUR-128:+NULL:+MD5:+PSK:+DHE-PSK:+ECDHE-PSK:+SHA256:+SHA384:+RSA-PSK:-VERS-TLS-ALL:$G_PRIO_MODE" G_SERVER_PRIO="NORMAL:${G_PRIO_CCM}+ARCFOUR-128:+NULL:+MD5:+PSK:+DHE-PSK:+ECDHE-PSK:+SHA256:+SHA384:+RSA-PSK:-VERS-TLS-ALL:$G_PRIO_MODE"
# The default prime for `openssl s_server` depends on the version:
# * OpenSSL <= 1.0.2a: 512-bit
# * OpenSSL 1.0.2b to 1.1.1b: 1024-bit
# * OpenSSL >= 1.1.1c: 2048-bit
# Mbed TLS wants >=1024, so force that for older versions. Don't force
# it for newer versions, which reject a 1024-bit prime. Indifferently
# force it or not for intermediate versions.
case $($OPENSSL_CMD version) in
"OpenSSL 1.0"*)
O_SERVER_ARGS="$O_SERVER_ARGS -dhparam data_files/dhparams.pem"
;;
esac
# with OpenSSL 1.0.1h, -www, -WWW and -HTTP break DTLS handshakes # with OpenSSL 1.0.1h, -www, -WWW and -HTTP break DTLS handshakes
if is_dtls "$MODE"; then if is_dtls "$MODE"; then
O_SERVER_ARGS="$O_SERVER_ARGS" O_SERVER_ARGS="$O_SERVER_ARGS"

2
tests/ssl-opt.sh
View file

@ -1139,7 +1139,7 @@ SRV_DELAY_SECONDS=0
P_SRV="$P_SRV server_addr=127.0.0.1 server_port=$SRV_PORT" P_SRV="$P_SRV server_addr=127.0.0.1 server_port=$SRV_PORT"
P_CLI="$P_CLI server_addr=127.0.0.1 server_port=+SRV_PORT" P_CLI="$P_CLI server_addr=127.0.0.1 server_port=+SRV_PORT"
P_PXY="$P_PXY server_addr=127.0.0.1 server_port=$SRV_PORT listen_addr=127.0.0.1 listen_port=$PXY_PORT ${SEED:+"seed=$SEED"}" P_PXY="$P_PXY server_addr=127.0.0.1 server_port=$SRV_PORT listen_addr=127.0.0.1 listen_port=$PXY_PORT ${SEED:+"seed=$SEED"}"
O_SRV="$O_SRV -accept $SRV_PORT -dhparam data_files/dhparams.pem" O_SRV="$O_SRV -accept $SRV_PORT"
O_CLI="$O_CLI -connect localhost:+SRV_PORT" O_CLI="$O_CLI -connect localhost:+SRV_PORT"
G_SRV="$G_SRV -p $SRV_PORT" G_SRV="$G_SRV -p $SRV_PORT"
G_CLI="$G_CLI -p +SRV_PORT" G_CLI="$G_CLI -p +SRV_PORT"