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Document subdomain matching of cert expr wildcards.

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In the manual, in comments, and in a new test.
This commit is contained in:
Jacob Nevins 2022-10-22 01:16:00 +01:00
parent 500568d204
commit 75ac444324
2 changed files with 12 additions and 5 deletions
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12
doc/config.but
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@ -2724,10 +2724,14 @@ hosts}
The simplest thing you can enter in the \q{Valid hosts this key is
trusted to certify} edit box is just a hostname wildcard such as
\cq{*.example.com}. But you can also enter multiple host name
wildcards, and port number ranges, and make complicated Boolean
expressions out of them using the operators \cq{&&} for \q{and},
\cq{||} for \q{or}, \cq{!} for \q{not}, and parentheses.
\cq{*.example.com}. This matches any host in any subdomain, so
both \cq{ssh.example.com} and \cq{login.dept.example.com} would
match, but \cq{prod.example.net} would not.
But you can also enter multiple host name wildcards, and port number
ranges, and make complicated Boolean expressions out of them using the
operators \cq{&&} for \q{and}, \cq{||} for \q{or}, \cq{!} for \q{not},
and parentheses.
For example, here are some other things you could enter.

5
utils/cert-expr.c
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@ -41,7 +41,9 @@ Syntax layer: all of those types of atom are interpreted as predicates
applied to the (hostname, port) data configured for the SSH connection
for which the certificate is being validated.
Wildcards are handled using the syntax in wildcard.c.
Wildcards are handled using the syntax in wildcard.c. The dot-
separated structure of hostnames is thus not special; the '*' in
"*.example.com" will match any number of subdomains under example.com.
More complex boolean expressions can be made by combining those
predicates using the boolean operators and parentheses, in the obvious
@ -778,6 +780,7 @@ static const struct EvalTest {
T("*.example.com", "hostname.example.com", 22, true),
T("*.example.com", "hostname.example.org", 22, false),
T("*.example.com", "hostname.dept.example.com", 22, true),
T("*.example.com && port:22", "hostname.example.com", 21, false),
T("*.example.com && port:22", "hostname.example.com", 22, true),
T("*.example.com && port:22", "hostname.example.com", 23, false),