The old URL still 301-redirects, but to the site root, not to the file — and the file itself is gone: the same path on the new domain returns 404. The author's page at https://www.aumasson.jp/siphash/ says that the SipHash page and documentation have moved to github.com/veorq/SipHash.
The vectors now live in vectors.h in that repository. All 64 values match the array below.
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96 | @@ -97,7 +97,7 @@ BOOST_AUTO_TEST_CASE(murmurhash3) 97 | ... 98 | in = 00 01 02 ... 3e (63 bytes) 99 | 100 | - from: https://131002.net/siphash/siphash24.c 101 | + from: https://github.com/veorq/SipHash/blob/master/vectors.h
The old siphash24.c URL now redirects to Aumasson's homepage.
Checked https://github.com/veorq/SipHash/blob/32d067603b93b47828700880649198e0bfbbcffa/vectors.h, it matches all cases here and in the src/test/data/siphash.json file (I guess it's fine to duplicate the exact same test cases).
https://lkml.indiana.edu/hypermail/linux/kernel/1909.0/04404.html also indicates this is a fair replacement:
Test vectors taken from official reference source available at:
Test vectors taken from reference source available at:
tested ACK 158efbc723d37eefb06939b7f7e851c8168342bd
lgtm ACK 158efbc723d37eefb06939b7f7e851c8168342bd