Comments on: SHA-256 in MySQL!

By: Richard Kernahan

Richard Kernahan — Sat, 03 Dec 2011 00:42:24 +0000

Nice work, Gwynne! Thank you.
Thanks also to Brian.
Note to visitors: when copying Brian’s amended code, ensure you fix up the quotes around the zeroes – some may become back-quotes when copied from a browser.

By: Brian Kim

Brian Kim — Sun, 20 Nov 2011 02:51:03 +0000

for fix problem..

RETURN LOWER(CONCAT(HEX(h0), HEX(h1), HEX(h2), HEX(h3), HEX(h4), HEX(h5), HEX(h6), HEX(h7)));

change to

RETURN LOWER(CONCAT(LPAD(HEX(h0), 8, ’0′), LPAD(HEX(h1), 8, ’0′), LPAD(HEX(h2), 8, ’0′), LPAD(HEX(h3), 8, ’0′), LPAD(HEX(h4), 8, ’0′), LPAD(HEX(h5), 8, ’0′), LPAD(HEX(h6), 8, ’0′), LPAD(HEX(h7), 8, ’0′)));

By: Jesse Bethke

Jesse Bethke — Tue, 17 May 2011 22:18:01 +0000

Absolutely wonderful! Saved me hours!

By: PakK_Pl

PakK_Pl — Mon, 04 Apr 2011 19:11:10 +0000

It’s not work correct!!!
for example: SELECT SHA2(’7cbe15d7435fa515db1f76b174d8801a44f90cf2bd3e386c411b54d5f7000740sfcss’, 256)
returns: ’6d7de993e583863315f1972ca7dc4ebd13194b0fb9f47d3f3d1dc37e2f99e’ (61 chars)
but correct value is: ’6d7de9930e583863315f1972ca7dc4eb00d13194b0fb9f47d3f3d1dc37e2f99e’ (64 chars)

By: Gwynne Raskind

Gwynne Raskind — Fri, 23 Jul 2010 20:41:13 +0000

I'm no expert when it comes to encryption myself, unfortunately. It sounds like you're asking for an HMAC digest. Wikipedia's article on HMAC has a thorough (if abstract) description of the algorithm.

By: Dave

Dave — Fri, 23 Jul 2010 11:54:16 +0000

Hi,

I stumbled across this and it’s very nearly what I’m looking for in a project I’m working on. I’m on mySQL 5.1 (Windows) and got the above script working perfectly. The only problem is that I need to hash the strings with a key.

Sorry, I’m a dreadful noob when it comes to encryption, but is what I’m asking possible?

Many thanks in advance for any pointers you can give.

Dave