Re: Reproducing a hash code
- To: mathgroup at smc.vnet.net
- Subject: [mg82989] Re: Reproducing a hash code
- From: michael.p.croucher at googlemail.com
- Date: Tue, 6 Nov 2007 03:42:22 -0500 (EST)
- References: <fgmppa$9i5$1@smc.vnet.net>
On 5 Nov, 10:03, "Steve Luttrell" <steve at _removemefirst_luttrell.org.uk> wrote: > I am trying to get results from Mathematica's Hash function (for hash type > "MD5") that are consistent with the results obtained using "openssl md5" in > Linux. > > The particular example I would like to reproduce is onhttp://wiki.secondlife.com/wiki/LlMD5String, where > > "Hello, Avatar!:0" > > hashes to (for hash type "MD5") > > 112abd47ceaae1c05a826828650434a6 > > In Mathematica 6 (Windows Vista, Intel hardware), doing the obvious > > Hash["Hello, Avatar!:0", "MD5"] // BaseForm[#, 16] & > > I get the following result > > a8c2ab1662a37cb9f8ea5af154a48c52 > > This is not the same as expected. Does anyone know how to get consistent > results? > > -- > Steve Luttrell > West Malvern, UK Hi Steve It seems that Mathematica includes the enclosing quotes "" when it generate it's hash: As you point out, in Mathematica 6 (on windows and Linux) if we do Hash["Hello, Avatar!:0", "MD5"] // BaseForm[#, 16] & we get a8c2ab1662a37cb9f8ea5af154a48c52 Now onto our linux box - if we do (notice the extra quotes I have added) echo -n '"Hello, Avatar!:0"' | openssl md5 we get a8c2ab1662a37cb9f8ea5af154a48c52 as before. Hope this helps, Mike