I believe I discovered the reason for issue #757: f2303a0d79.
This commit removed attempted to replace `$cbc_cipher_list_hex` (which was computed on the fly) with `$cbc_ciphers_hex` (which is static). However, the function was still using `$cbc_cipher_list_hex`, and since it wasn't being initialized to "" at the beginning of the function, the second call to `run_beast()` (to handle the second IP address) just appended to the value created by the first. Then, when the first two bytes were removed from the resulting string the result was a malformed cipher suite list, which caused `tls_sockets()` to fail.
Open issues: 1) The SNI logic 2) The fileout logic. 3) another section with ``trust_nosni -eq 4/8``
For 2): fileout is a general finding MEDIUM [1] which isn't in line now with the pr_*finding
in the section above anymore. It would make sense to punish HTTP services more than others.
Unfortunately he fileout statement cannot be moved below pr_svrty_medium/pr_svrty_high as
trustfinding_nosni hasn't been determined yet.
Fast solution would be probably to move the trustfinding_nosni section above the trustfinding
section.
Still 3) and a different trust over non-SNI makes it difficult -- e.g. Server has CN match only over
SNI but without SNI SAN matches. That's an edge case though which probably doesn't exist (like Bielefeld)
[1] That was WARN before. WARN should indicate a status of testssl that it cannot perform a check
Open issues: 1) The SNI logic 2) The fileout logic. 3) another section with ``trust_nosni -eq 4/8``
For 2): fileout is a general finding MEDIUM [1] which isn't in line now with the pr_*finding
in the section above anymore. It would make sense to punish HTTP services more than others.
Unfortunately he fileout statement cannot be moved below pr_svrty_medium/pr_svrty_high as
trustfinding_nosni hasn't been determined yet.
Fast solution would be probably to move the trustfinding_nosni section above the trustfinding
section.
Still 3) and a different trust over non-SNI makes it difficult -- e.g. Server has CN match only over
SNI but without SNI SAN matches. That's an edge case though which probably doesn't exist (like Bielefeld)
[1] That was WARN before. WARN should indicate a status of testssl that it cannot perform a check
This PR implements the suggestion from #753 for a child process in mass testing to send a signal to the parent to exit if the child encounters an error parsing its command line. At the moment, the child only sends the signal if it encounters an error that results in the `help()` function being called, but that could easily be changed (e.g., to also send a signal if `fatal()` is called in the child process).
In the case of parallel mass testing, the cleanup function needs to call `get_next_message_testing_parallel_result()` for the child that sent the signal, since otherwise the child's error message would not be displayed. Since I cannot tell which child sent the signal, I just call `cleanup()`, which displays the output of all completed child processes. Since the child process will send the signal almost immediately after starting, it can be assumed the that process that send the signal will be the last one that completed, and so its output will be displayed last (so it isn't hidden from the user).
Note that PR #753 is still needed, since there are still scenarios in which a child would not produce any JSON output, but the parent testssl.sh would not exit (e.g., the child process cannot open a socket to the server it is supposed to test). In additional, PR #754 would still be useful, since it would be more user friendly to catch the error in the mass testing file immediately (when possible) rather that partway through a potentially time-consuming testing process.
There is a bug in testssl.sh that occurs if mass testing is being performed, there is an error in the command line for one of the child tests, and either a single HTML file or a single JSON file is being created.
If mass testing is being performed and `parse_cmd_line()` detects an error in the command line for one of the child tests, then it will call `help()`, which will exit the program, resulting in `cleanup ()` being called. `cleanup ()` will call `html_footer()` and `fileout_footer()`. Since `html_header()` and `json_header()` have not yet been called, `$HTMLHEADER` and `$JSONHEADER` will both be `true, and so `html_footer()` and `fileout_footer()` will output HTML and JSON footers, even though no headers have been output.
This PR fixes the problem by having `help()` set `$HTMLHEADER` and `$JSONHEADER` to `false` so that no HTML or JSON footers are created.
A related problem is that if a single JSON file is being created, the parent process will insert a separator (a comma) into the JSON file between the outputs of each child process. However, if there is an error in one of the child process's command lines, then this child process will not produce any JSON output and so the JSON file will have two consecutive separators (commas), which is invalid according to http://jsonlint.com.
This PR provides a partial fix for the problem for parallel mass testing by checking whether a child process has created a non-empty JSON output before adding a separator to the JSON file. It leaves two unresolved problems:
* It does not fix the problem at all for `run_mass_testing()`, where the separator is added before the test with the command line error is run.
* It does not fix the problem for parallel mass testing for the case in which the first child test has a command line error.
started to use the ip parameter to decide where the dns resoultion
takes place (see #739 and #748). --ip=proxy or DNS_VIA_PROXY=true
will mean DNS resolutioni is done by proxy,
furthermore: swapped a few pr_magenta by pr_warning. Generally
testssl.sh should use for warnings a warning function and not
directly a color (we want to be flexible). There are still a few
remainders for fatal() which use bold magenta and thus I haven't
changed yet.
Also html_reserved() is being called also if no html output
is being requested. This could be fixed better probably.
This PR introduces the following changes/improvements to running mass testing in parallel:
* Continuous feedback is provided on the progress of testing, so that testssl.sh doesn't appeared to be frozen, even if it is waiting a long time for a child test to complete. [The feedback text is sent to `stderr` so that it doesn't appear in the log file if the `--logging` option is used.]
* Text sent to `stderr` by a child test is captured and then displayed in context with the appropriate test rather than being displayed at the time the error occurs. [Note that this means that if the `--logfile <logfile>` option is used (with `logfile` being the name of a file), then `logfile` will include both `stdout` and `stderr`.]
* If a test is started but it does not complete (because testssl.sh was stopped or because the test timed out), then a message is displayed indicating that the test didn't finish.
I believe that `run_mass_testing_parallel()` is either ready for use or nearly ready for use. So, I changed the program to use `run_mass_testing_parallel()` rather than `run_mass_testing()` if the `$EXPERIMENTAL` flag is set.
was received, testssl.sh tries 3 times to get memory from the server, If
the server returns different memory it's highly likely vulnerable.
(some more vulnerable devices to test against would be appreciated).
This is the default now -- all other hosts are mostly labled as OK.
Parsing SERVICE should be a little faster and more reliable
Increased needed debug level for output @ parse_tls_serverhello
Sometimes it just does not. In those case also sometimes session resumption
via tickets is supported.
This fixes the output for Session Ticket RFC 5077 and doesn't draw the wrong
conclusion from a missing lifetime hint.
It also tests for ticketbleed first whether there's a session ticket TLS
extension.
When the `--log`, `--logging`, or `--logfile <logfile>` option is being used and testssl.sh is stopped, a "printf: write error: Broken pipe" message tends to appear. From what I can tell, this is a result of the `tee` process being killed before the `cleanup ()` function completes. At the moment, `cleanup ()` doesn't write very much to `stdout`, but if parallel mass testing is performed, then `cleanup ()` may try to write the results of several previously completed tests.
This PR fixes the problem by adding the `-i` option ("ignore interrupt signals") to `tee`.
Note that I have tested this on a Linux desktop and an OS X laptop, but don't have a MS Windows computer on which to test this change.
This PR provides improvements to `run_mass_testing_parallel()`. Currently, `run_mass_testing_parallel()` treats `$MAX_PARALLEL` as the maximum difference between the number of the test whose results were last processed and the number of the most recently started test. This means that test #40 will not be started until the results of test #20 have been processed. I've encountered situations in which tests 21 though 39 have completed, but test #20 is still running, and so no new tests are started.
This PR fixes the problem by checking the status of all running child tests to see if any are complete, rather than just looking at `$NEXT_PARALLEL_TEST_TO_FINISH`. This prevents one slow child test (or a few slow child tests) from slowing up the entire mass testing process.
This PR also changes the basis for determining whether a slow child process should be killed. Rather than waiting `$MAX_WAIT_TEST` seconds from the time that the parent started waiting (which is rather arbitrary), it kills the process if `$MAX_WAIT_TEST` seconds have passed since the child test was started. Given this, and that the above change makes it less likely that a slow child test will slow up the overall testing, I increased `$MAX_WAIT_TEST` from 600 seconds to 1200 seconds.
I added some `debugme` statements that provide feedback on the status of testing, but in non-debug mode there may be a perception issue. If one test (e.g., test #20) is very slow, testssl.sh will not display any results from later tests until the slow test finishes, even though testssl.sh will continue running new tests in the background. The user, seeing no output from testssl.sh for an extended period of time, may think that testssl.sh has frozen, even though it is really just holding back on displaying the later results so that the results will be displayed in the order in which the tests were started.
Dirk
David Cooper