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Catch MySQL (yaSSL) server bug when testing standard cipher categories

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Unfortunately, most categories were passing incorrectly, since a
tls_socket() error was interpreted as a success for many of the cases.
Now we explicitely check for the known yaSSL failure and raise a warning
that the test is inconclusive.

New output against --starttls=mysql looks like:

Testing ~standard cipher categories
-----------------------------------

 NULL ciphers (no encryption)                  SERVER_ERROR: test inconclusive due to MySQL Community Edition (yaSSL) bug.
 Anonymous NULL Ciphers (no authentication)    SERVER_ERROR: test inconclusive due to MySQL Community Edition (yaSSL) bug.
 Export ciphers (w/o ADH+NULL)                 SERVER_ERROR: test inconclusive due to MySQL Community Edition (yaSSL) bug.
 LOW: 64 Bit + DES encryption (w/o export)     offered (NOT ok)
 Weak 128 Bit ciphers (SEED, IDEA, RC[2,4])    SERVER_ERROR: test inconclusive due to MySQL Community Edition (yaSSL) bug.
 Triple DES Ciphers (Medium)                   offered
 High encryption (AES+Camellia, no AEAD)       offered (OK)
 Strong encryption (AEAD ciphers)              SERVER_ERROR: test inconclusive due to MySQL Community Edition (yaSSL) bug.

Partial workaround for #793
This commit is contained in:
Steven Danneman 2017-07-19 17:31:14 -07:00
parent ad1dd01466
commit 72851c7e3f
1 changed files with 65 additions and 52 deletions
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13
testssl.sh
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@ -2294,6 +2294,17 @@ std_cipherlists() {
fi
fi
fi
if [[ $sclient_success -ne 0 ]] && $BAD_SERVER_HELLO_CIPHER; then
# If server failed with a known error, raise it to the user.
if [[ $STARTTLS_PROTOCOL == "mysql" ]]; then
pr_warning "SERVER_ERROR: test inconclusive due to MySQL Community Edition (yaSSL) bug."
fileout "std_$4" "WARN" "SERVER_ERROR: test inconclusive due to MySQL Community Edition (yaSSL) bug."
else
pr_warning "SERVER_ERROR: test inconclusive."
fileout "std_$4" "WARN" "SERVER_ERROR: test inconclusive."
fi
else
# Otherwise the error means the server doesn't support that cipher list.
case $3 in
2) if [[ $sclient_success -eq 0 ]]; then
# Strong is excellent to offer
@ -2329,6 +2340,7 @@ std_cipherlists() {
pr_svrty_high "offered (NOT ok)"
fileout "std_$4" "HIGH" "$2 offered - bad"
else
# need a check for -eq 1 here
pr_done_good "not offered (OK)"
fileout "std_$4" "OK" "$2 not offered"
fi
@ -2347,6 +2359,7 @@ std_cipherlists() {
fileout "std_$4" "WARN" "return condition $3 unclear"
;;
esac
fi
tmpfile_handle $FUNCNAME.$debugname.txt
[[ $DEBUG -ge 1 ]] && tm_out " -- $1"
outln