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POhash and compare password which is saved as hash using SHA1 in sql server
 

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  1. POhash and compare password which is saved as hash using SHA1 in sql server
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    <p>i have a column of varbinary(max) type and used a salt of nvarchar(60) type that is generated randomly. I saved the salt in db and saved password using hashbyte(password+ salt).</p> <p>Now I want to compare user password and authenticate him.</p> <p>I tried taking his password and running this query--</p> <pre><code>SELECT [email] from admin where [password]=HashBytes('SHA1','xxxxxx' +'/KsDnXdU+_a&lt;t19wYCnEi/lxmXmAutR3DVA$#]~dSBskRMB?sb#41+=MFRpE') </code></pre> <p>It is not returning me email. I ran it directly on sql server management studio. But It gave me blank. Why is it so?</p> <p>When im selecting by email im getting role, this means email is registered. Is something wrong in my salt or query?</p> <p>I fixed it. Actualy adding salt directly was causing me a bug, though it was getting added directly and hash was computed and no error was returned from sql server.</p> <p>When i ran this query </p> <pre><code>Select role from admin where salt='/KsDnXdU+_a&lt;t19wYCnEi/lxmXmAutR3DVA$#]~dSBskRMB?sb#41+=MFRpE' </code></pre> <p>I got no result. I realised, it was some Conversion problem. I used then <code>Convert(nvarchar(60),'%?r&gt;%Vb+$hUZO8}=38/_J[@q@1mf^rz!V&amp;q~\dLH5nQ&amp;/edR\c[6ya|q$e%r')</code> </p> <p>and ran my query as </p> <pre><code>SELECT [email] from admin where [password]=HashBytes('SHA1', 'xxxxxx'+Convert(nvarchar(60),'%?r&gt;%Vb+$hUZO8}=38/_J[@q@1mf^rz!V&amp;q~\dLH5nQ&amp;/edR\c[6ya|q$e%r')) </code></pre> <p>This returned me email. I am really not sure why this happened, but using sqlserver 2005, and above query i fixed it. I request moderators, If it is any bug in sql server 2005, please do let other know.</p>
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