Data comparing

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I have created a form in which how can compare user id and password which is stored in database.
Please provide me solution.

Posted 31-Oct-10 3:03am

rajat_verma

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2 solutions

Solution 1

It seems quite improbable that you need help comparing the data. Since all you need to do is use the == operator.

Example:

C#

if(passwordEntered == GetPasswordFromDB(usernameEntered))
{
   // you are now authenticated
   
}

Note: See OriginalGriff's answer where he describes how you can avoid storing and comparing the password in clear text.

Posted 31-Oct-10 3:05am

Nish Nishant

Updated 31-Oct-10 3:11am

v5

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OriginalGriff · Accepted Answer · 2010-10-31T03:08:00

Solution 2

Use a SHA hash of the password and compare that with the database stored value. That way, the password is not held in clear at any time and cannot be stolen. It is also a good idea to include the username/userid in the password string before generating the SHA code to prevent two users with teh same password having identical SHA codes.
The userid can be stored in clear.

Posted 31-Oct-10 3:08am

OriginalGriff

Comments

Nish Nishant 31-Oct-10 9:09am

Voted 5, marked as answer.

Dalek Dave 31-Oct-10 10:12am

Gooad Response.