Decode A Sha1 Encryption

I decided to sha1 passwords into the database for the creation of a user account. When logging into the system, this sql statement works, but I can't figure out how to reverse it, so I'm assuming this is a one-way encryption: PHP Code:

$sql = "SELECT email, password, first
††††††††††††††††FROM `account`
††††††††††††††††WHERE `email` = '" . addslashes(htmlspecialchars($AdminID)) . "'
††††††††††††††††`password` = '" . sha1(addslashes(htmlspecialchars($AdminPswd))) . "'";

I need to have a statement to retrieve the encryption and decode it for password retrieval (when a user lost their password). Is there a way to decode this or should I choose another encryption technique (2-way) other than the basic base64_decode/base64_encode?


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I want to know to decode sha1 encoded url into normal url.

Example:<sha1 code>/index1.htm

I want this to:

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my answer was answered about password protection(php users passwords protection) and my final code:

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Let's say for strongest security, I want to encrypt IP, signup date, just everything. But in admin panel I want to retrieve that info, so it means I need decript itIs it possible from this script/function to make a decrypt script/function?

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I added this to my sign up code :


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function checklogin($username, $password){
global $mysqli;


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Another n00b question but when inserting data into a database using SHA1 do you need to do this: PHP Code:

INSERT INTO $table (`password`)

or something like that, and when retrieving from it: PHP Code:

SELECT * FROM $table WHERE sha1($_POST['password']);

Or can you just got $_POST['password']
Sorry I dont know how this works. Also what is a snippet for salting a sha1 command.

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$normal_hashed = sha1("test");

Both will return same values. Where does CodeIgniter uses encryption_key?

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My idea is that then it is secured during and after transit from web server to Db. So if I say SHA1'd user and pw(making sure the password is a alphanumeric string) before calling MySQL, if someone picked them up using a sniffer etc could they work them out?

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I'm building a registration/login script:

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I've tested this out by submitting (username1, password1) and (username2, password2) Both "password1" and "password2" are encrypted to the same string:

da39a3ee5e6b4b0d3255bfef95601890afd80709 or d41d8cd98f00b204e9800998ecf8427e to be doesn't matter what I use for the password

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MD5CryptoServiceProvider MD5 = new MD5CryptoServiceProvider();
byte[] bs = System.Text.Encoding.UTF8.GetBytes(stringToEncrypt);
String myString = Convert.ToBase64String(MD5.ComputeHash(bs));

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The registration md5-encrypts it as: 8dd1635ff2b8c9319526
The login-script md5-encrypts it as: 8dd1635ff2b8c931952663d4922956e7

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I've experienced a vary strange problem working with PHP and payment gateways. If I use the sha1 function for some string I get the encrypted string, but this function output is different from the one I get using openssl on the command line of a linux machine. Ex:

inside a php I write: sha1("12345")
in the command line I type: echo 12345 ¦ openssl sha1

The output of both functions is different. However, if I store the string 12345 in a somefile.txt and I use sha1_file() function the result is the same as the standard expects, so following the previous example, when I write:

inside a php: sha1_file("somefile.txt")
in the command line I type: echo 12345 ¦ openssl sha1

The output of both functions is the same. Anybody knows if this behaviour is normal, and if it is what's it obeying to?

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i change it so if i was adding to the database? Because when i add a new password its differnt to what it would be if im getting from the database.

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I've been reading up on password encryption and I've always used MD5 but seems like its not very secure any more, so now am wondering what's better MD5 VS SHA1 VS AES_ENCRYPT?

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// Database Connection
$con = getConnection();
$sqlQuery = mysql_query("SELECT count(*) from Customers

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For a log-in page I have created a mysql db and user registers
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I insert the $passwd in mysql_insert. The password gets
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Here's how it is done in the sample libraries they have provided.

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As an example:

The binary secret from RST is
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Here's what I've tried.

$sql = "CREATE TABLE Members
mem_username varchar(12) NOT NULL UNIQUE,
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Apache version†††1.3.39 (Unix)
PHP version†† †5.2.4
MySQL version†† †5.0.27-standard

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byte[] bytes = encoding.GetBytes(s);
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I would like to get this to work, and I can't achieve it by altering the c# code (although no-doubt that would be the easiest fix).

OK, I have altered the code following Artefacto's advice, and it still isn't working as expected.

The PHP Code now looks like this:


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