| Server IP : 85.214.239.14 / Your IP : 18.189.192.214 Web Server : Apache/2.4.62 (Debian) System : Linux h2886529.stratoserver.net 4.9.0 #1 SMP Tue Jan 9 19:45:01 MSK 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.18 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : OFF | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : OFF Directory : /proc/self/root/proc/2/task/2/cwd/proc/2/root/usr/share/doc/libmail-dkim-perl/ |
Upload File : |
Following are some notes about gray areas in the RFC 4871 DKIM
specification.
Section 3.4.4 "relaxed" Body Canonicalization
Empty bodies. Unlike the "simple" body canonicalization, which
explicitly says to add a CRLF, the "relaxed" body canonicalization
does not say this. The consensus at DKIM-Interop was NOT to add
a CRLF for "relaxed" body canonicalization when the body is empty.
Section 3.5 "i= Identity of the user or agent"
In the section describing "identity", it says dkim-quoted-printable
encoding is to be used, but quoted printable is not mentioned in the
ABNF. The ABNF includes the "Local-part" token, which allows a quoted
string with backslashes to escape certain characters.
My interpretation (combining the text and my own reasoning), is that
the i= tag value should be the dkim-quoted-printable encoding of:
[ Local-part ] "@" domain-name
So, e.g.
local part domain
---------- -----------
i="meet=20joe"@example.com => "meet joe" example.com
i="fine=3Bmess"@example.com => "fine;mess" example.com
i="j=20s=22@example.com => "j s" example.com
i=j smith @ example . com => jsmith example.com
Section 3.6.1 "granularity of the key"
Does "an empty g= value never matches any addresses" mean that any
signature, no matter the i= value, using this key cannot be
matched? The consensus at DKIM-Interop was that YES, that's what
it means.
It should be noted that this is an incompatible change from
RFC4870-DomainKeys, where an empty g= tag in the public key is
equivalent to g=*, which would match anything.