+ # Tainted-data checks
+ warn
+ # taint only in lookup string, properly quoted
+ set acl_m0 = ok: ${lookup mysql {select name from them where id = '${quote_mysql:$local_part}'}}
+ # taint only in lookup string, but not quoted
+ set acl_m0 = FAIL1: ${lookup mysql,no_rd {select name from them where id = '$local_part'}}
+ warn
+ # option on lookup type unaffected
+ set acl_m0 = ok: ${lookup mysql,servers=SSPEC {select name from them where id = '${quote_mysql:$local_part}'}}
+ # partial server-spec, indexing main-option, works
+ set acl_m0 = ok: ${lookup mysql,servers=PARTIAL {select name from them where id = '${quote_mysql:$local_part}'}}
+ # oldstyle server spec, prepended to lookup string, fails with taint
+ set acl_m0 = FAIL2: ${lookup mysql {servers=SSPEC; select name from them where id = '${quote_mysql:$local_part}'}}
+ # oldstyle partial server spec, prepended to lookup string, indexing main-option, but not quoted
+ warn set acl_m0 = FAIL3: ${lookup mysql {servers=PARTIAL; select name from them where id = '$local_part'}}
+
+ # In list-style lookup, tainted lookup string is ok if server spec comes from main-option
+ warn set acl_m0 = ok: hostlist
+ hosts = net-mysql;select * from them where id='${quote_mysql:$local_part}'
+
+ # ... but setting a per-query servers spec fails due to the taint
+ warn set acl_m0 = FAIL4: hostlist
+ hosts = <& net-mysql;servers=SSPEC; select * from them where id='${quote_mysql:$local_part}'
+
+ # The newer server-list-as-option-to-lookup-type is not a solution to tainted data in the lookup, because
+ # string-expansion is done before list-expansion so the taint contaminates the entire list.
+ warn set acl_m0 = FAIL5: hostlist
+ hosts = <& net-mysql,servers=SSPEC; select * from them where id='${quote_mysql:$local_part}'
+