CODEWITHSUNDEEP
phpiphone
Joey
Joey

Reputation: 535

decrypt result from server

I'm trying to decrypt a variable that I've encrypted from my web server and haven't gotten any luck. I've encrypted the variable on the site using sha1(variable) in php, but am stuck trying to decrypt it once its passed back to the iphone. If you have any other code other than sha1 that works, im happy with that too. thanks

Upvotes: 0

Views: 138

Answers (4)

Thilo
Thilo

Reputation: 171

True, MD5 & SHA1 are one way hash algorithms. If you want to be able to encode and then decode a variable you will need to use the mcrypt functions.

Upvotes: 1

Jorge Israel Peña
Jorge Israel Peña

Reputation: 38606

If you have the password hashed, then you shouldn't need to 'un-hash' it, right? That's the whole point. You have the password stored in the db/server as a hash, and when you need to check it, you hash the user's login attempt and compare. Or perhaps I'm missing something?

Upvotes: 0

Jacob Relkin
Jacob Relkin

Reputation: 163268

You cannot decrypt a one-way hash. Key words here are one-way. The hashing algorithm only works one way.

In order to do a validity check, you should first compute the hash of the other string, then compare those.

Upvotes: 2

Jonathan Leffler
Jonathan Leffler

Reputation: 754090

SHA1 is not an encryption technique.

SHA1 is a hash. It is designed to be irreversible.

Upvotes: 3

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