As there as suggestions to check intermediate certificates for things such as expiration date, this commit saves the text versions of each of the intermediate certificates so that they are available to extract additional information.
This commit checks whether any intermediate certificates provided by the server include an extended key usage extension that asserts the OCSP Signing key purpose.
This commit replaces #1680, which checks for such certificates by comparing the server's intermediate certificates against a fixed list of known bad certificates.
* open: generation of intermediate certificate files. We do that
at several places. But for some reasons I do not understand currently
we remove those files.
* we don't name the offending certificate
run_cipherlists() checks for support for different groups of ciphers, but does not indicate which ciphers in each group are supported. So, for example, if the JSON file indicates that there is a problem with severity level "HIGH" because the "LOW" ciphers are available, there is no clear indication of which of these ciphers are supported by the server.
If run_server_preference() is run with "--color 3", then there will be a visual indication (via color) of the ciphers the server supports that are considered bad, but this information does not appear in the JSON (or CSV) output. The JSON (or CSV) output will include information about every cipher that is supported, but the severity level is always "INFO".
This commit addresses this problem by changing the fileout() calls in ciphers_by_strength() and cipher_pref_check() that output each supported cipher individually so that the "severity" argument is an indication of the quality of the cipher. With this, information about which bad ciphers are supported can easily be found in the JSON/CSV output.
When testssl.sh is called with an unknown option it prints something like:
0: unrecognized option "--option"
It should be printing the name of the program rather than "0". This commit fixes that.
This commit separates pr_cipher_quality() into two functions, one that returns the quality of a cipher as a numeric rating (get_cipher_quality()) and one that prints a cipher based on its quality (pr_cipher_quality()). This separation allows get_cipher_quality() to be used to determine how good a cipher is without having to print anything. Having this ability would be helpful in implementing the changes suggested in #1311.
Moved the sentence ~i "A grade better than T would lead to a false sense of security"
to the documentation. No reason for excuses in the output. ;-) Explanation fits
better in the doc.
See also #1657
PR #1373 changed get_cn_from_cert() to handle certificate subject names that include more than one CN attribute. It did this by converting newline characters to spaces. It seems that this resulted in a space character being added to the end of the string returned by get_cn_from_cert() even in the case that the subject name only included one CN attribute. The presence of the space character in returned value caused compare_server_name_to_cert() to determine that the CN attribute did not contain a DNS name (since DNS names cannot include spaces), and so compare_server_name_to_cert() reports that the server name does not match against the CN in the subject. This may be the reason for the problem noted in #1555.
This commit fixes the above problem and also enhances the matching of the CN in the subject name against the server's name. Currently, compare_server_name_to_cert() assumes that the subject field contains at most one CN attribute. However, as noted in #1373, some certificates include subject names with more than one CN attribute, and RFC 6125 (Section 6.2.2) indicates that the certificate subject name include more than one CN, with each specifying a different DNS name.
So, in addition to fixing the problem with the space character, this commit also enhances the CN matching to work even if the certificate includes more than one CN attribute in the subject name.
In some cases when the Trust finding is printed, there is no space between the results when SNI is used and the results without SNI (which appear in paraenthesis). This commit adds the missing space.
This commit fixes several issues related to Shellcheck issue SC2034: unused variables.
In most cases variables are declared in a function, but are referenced later. The exceptions are:
* SESS_RESUMPTION is declared and values are assigned to it, but it us never used. (Same applies for not_new_reused in sub_seession_resumption().)
* In run_cipherlists(), there is a typo in the declaration of sslv2_tdes_ciphers.
* In get_caa_rr_record(), "hash", "len", and "line" are used but not declared.
This commit adds a function for querying the TXT DNS record, so
that subsequently we'll can build on top of that a function for
checking MTA-STS, see #1073.
Also it modifies a local variable mxs in get_mx_record() which
was declared as mx but mxs was used. (That is pending an backport
to 3.0.)
Dirk Wetter
Magnus Larsen
David Cooper
Christoph Settgast
Magnus Larsen