On Thursday, January 31, 2013 6:55:05 PM UTC+1, Peter Pearson wrote: > On Thu, 31 Jan 2013 08:43:03 -0800 (PST), kryptox.excha...@gmail.com wrote: > > > > > I'm wondering if anyone can help me as I can't seem to get > > > this to work. There is an online dice game that is > > > provably fair by calculating the 'dice roll' using using a > > > sha256 hash calculated against my transaction ID generated > > > by me. The secret used to make the calculation is revealed > > > at the end of each day thus allowing you to prove they > > > didn't cheat. So they provide the following to allow you > > > to verify the calculation of the dice roll: > > > > > > Secret used = > > r7A7clvs9waizF+6QEiI0tgAq1ar48JItK3kg9kaeAFXz2vsMsHmOd9r9fhkmtxTz3CQnGAPMaDeKLvgb1A2VA > > > Secret hash > > sha256(r7A7clvs9waizF+6QEiI0tgAq1ar48JItK3kg9kaeAFXz2vsMsHmOd9r9fhkmtxTz3CQnGAPMaDeKLvgb1A2VA) > > = 48d78d573b9b8e11a13a72d9a78011f2e5d9754d89de47b209f32c51777f535d > > > Lucky hash > > sha256(r7A7clvs9waizF+6QEiI0tgAq1ar48JItK3kg9kaeAFXz2vsMsHmOd9r9fhkmtxTz3CQnGAPMaDeKLvgb1A2VA:108128 > > 06653842663997bf5971637f86f26c71a4716276d7fa8f323a83588d91:1) = > > dfa8769be81a543002865c88a5b52fa07f3b67fc7cd9b519c3f6a6452bcd48e4 > > > > > > Lucky Number 0x48e4 = 18660 > > > > > > So, I'm doing the following: > > > > > > C:\Python27>python > > > Python 2.7.3 (default, Apr 10 2012, 23:24:47) [MSC v.1500 64 bit (AMD64)] > > on win32 > > > Type "help", "copyright", "credits" or "license" for more information. > > >>>> import hashlib, hmac > > >>>> txid = > >>>> 'r7A7clvs9waizF+6QEiI0tgAq1ar48JItK3kg9kaeAFXz2vsMsHmOd9r9fhkmtxTz3CQnGAPMaDeKLvgb1A2VA' > > >>>> secret = > >>>> '10812806653842663997bf5971637f86f26c71a4716276d7fa8f323a83588d91:1' > > [snip] > > > > >>> txid = > >>> 'r7A7clvs9waizF+6QEiI0tgAq1ar48JItK3kg9kaeAFXz2vsMsHmOd9r9fhkmtxTz3CQnGAPMaDeKLvgb1A2VA' > > >>> secret = > >>> '10812806653842663997bf5971637f86f26c71a4716276d7fa8f323a83588d91:1' > > >>> hashlib.sha256(txid+":"+secret).hexdigest() > > 'dfa8769be81a543002865c88a5b52fa07f3b67fc7cd9b519c3f6a6452bcd48e4' > > >>> 0x48e4 > > 18660 > > >>> > > > > . . . which is the number you wanted, right? > > > > > > -- > > To email me, substitute nowhere->spamcop, invalid->net.
Yes, thank you Peter! -- http://mail.python.org/mailman/listinfo/python-list