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Fix printf escape errors in shell scripts

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Fix `printf "$foo"` which treats the value of `foo` as a printf format
rather than a string.

I used the following command to find potentially problematic lines:
```
git ls-files '*.sh' | xargs egrep 'printf +("?[^"]*|[^ ]*)\$'
```
The remaining ones are false positives for this regexp.

The errors only had minor consequences: the output of `ssl-opt.sh`
contained lines like
```
Renegotiation: gnutls server strict, client-initiated .................. ./tests/ssl-opt.sh: 741: printf: %S: invalid directive
PASS
```
and in case of failure the GnuTLS command containing a substring like
`--priority=NORMAL:%SAFE_RENEGOTIATION` was not included in the log
file. With the current tests, there was no risk of a test failure
going undetected.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2020-08-26 20:05:11 +02:00
parent 663d0993ec
commit ffdcadf084
3 changed files with 21 additions and 21 deletions
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24
tests/ssl-opt.sh
View file

@ -384,7 +384,7 @@ print_name() {
fi
LINE="$LINE$1"
printf "$LINE "
printf "%s " "$LINE"
LEN=$(( 72 - `echo "$LINE" | wc -c` ))
for i in `seq 1 $LEN`; do printf '.'; done
printf ' '
@ -662,12 +662,12 @@ run_test() {
fi
check_osrv_dtls
printf "# $NAME\n$SRV_CMD\n" > $SRV_OUT
printf '# %s\n%s\n' "$NAME" "$SRV_CMD" > $SRV_OUT
provide_input | $SRV_CMD >> $SRV_OUT 2>&1 &
SRV_PID=$!
wait_server_start "$SRV_PORT" "$SRV_PID"
printf "# $NAME\n$CLI_CMD\n" > $CLI_OUT
printf '# %s\n%s\n' "$NAME" "$CLI_CMD" > $CLI_OUT
eval "$CLI_CMD" >> $CLI_OUT 2>&1 &
wait_client_done
@ -1877,12 +1877,12 @@ run_test "Session resume using cache, DTLS: openssl server" \
# Tests for Max Fragment Length extension
if [ "$MAX_CONTENT_LEN" -lt "4096" ]; then
printf "${CONFIG_H} defines MBEDTLS_SSL_MAX_CONTENT_LEN to be less than 4096. Fragment length tests will fail.\n"
printf '%s defines MBEDTLS_SSL_MAX_CONTENT_LEN to be less than 4096. Fragment length tests will fail.\n' "${CONFIG_H}"
exit 1
fi
if [ $MAX_CONTENT_LEN -ne 16384 ]; then
printf "Using non-default maximum content length $MAX_CONTENT_LEN\n"
echo "Using non-default maximum content length $MAX_CONTENT_LEN"
fi
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
@ -2823,14 +2823,14 @@ MAX_IM_CA='8'
MAX_IM_CA_CONFIG=$( ../scripts/config.pl get MBEDTLS_X509_MAX_INTERMEDIATE_CA)
if [ -n "$MAX_IM_CA_CONFIG" ] && [ "$MAX_IM_CA_CONFIG" -ne "$MAX_IM_CA" ]; then
printf "The ${CONFIG_H} file contains a value for the configuration of\n"
printf "MBEDTLS_X509_MAX_INTERMEDIATE_CA that is different from the script’s\n"
printf "test value of ${MAX_IM_CA}. \n"
printf "\n"
printf "The tests assume this value and if it changes, the tests in this\n"
printf "script should also be adjusted.\n"
printf "\n"
cat <<EOF
${CONFIG_H} contains a value for the configuration of
MBEDTLS_X509_MAX_INTERMEDIATE_CA that is different from the script's
test value of ${MAX_IM_CA}.
The tests assume this value and if it changes, the tests in this
script should also be adjusted.
EOF
exit 1
fi