[Bug 222684] AH hmac-sha2-384 is incompatible with Linux AH hmac(sha384)

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Fri Sep 29 13:51:41 UTC 2017


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222684

            Bug ID: 222684
           Summary: AH hmac-sha2-384 is incompatible with Linux AH
                    hmac(sha384)
           Product: Base System
           Version: 11.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: jasonmader at gmail.com

I thought the problem might be because Linux is putting too many bits on the
wire, but it might be a IPv6 padding issue covered here,

https://bugzilla.suse.com/show_bug.cgi?id=1019412

FreeBSD side:

add -n ::SRC ::DST ah 0xSPI -m transport -A hmac-sha2-384 0xKEY;

Linux side:

ip xfrm state add src ::SRC dst ::DST proto ah spi 0xSPI auth "hmac(sha384)"
0xKEY mode transport

If the SUSE people are correct about the behavior, FreeBSD IPv6 Authenticated
Header might not be properly padded.

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