matching SHA1 passwords

[dushkin]

hi. i am new to security and databases. i have recently built a members db with a sha1 password column in it. Now, when i log in, i want to be able to discover the appropriate password for the appropriate email address. how do i do that for a hashed password? if i use the hashing function on the login script, i'll get a different hash. how do i match the hashed longin password with the hashed registered password?

thanks in advance.

 

[siberian]

For a given input you should always get the same output with SHA1.

Are you using time sensitive data in your SHA1 creation?