Php sha1
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PHP function sha1
This function calculates the SHA-1 hash of a string.
Syntax sha1
- String: input
- Raw (Option): True (20 character binary format), False (Default- 40 character hex number)
sha1(string, RAW)
SHA1 Encryption
- FROM: From Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/SHA-1)
In cryptography, SHA-1 is a cryptographic hash function designed by the United States National Security Agency and published by the United States NIST as a U.S. Federal Information Processing Standard. SHA stands for "secure hash algorithm". The three SHA algorithms are structured differently and are distinguished as SHA-0, SHA-1, and SHA-2. SHA-1 is very similar to SHA-0, but corrects an error in the original SHA hash specification that led to significant weaknesses. The SHA-0 algorithm was not adopted by many applications. SHA-2 on the other hand significantly differs from the SHA-1 hash function.
SHA-1 is the most widely used of the existing SHA hash functions, and is employed in several widely used applications and protocols. In 2005, security flaws were identified in SHA-1, namely that a mathematical weakness might exist, indicating that a stronger hash function would be desirable.[2] Although no successful attacks have yet been reported on the SHA-2 variants, they are algorithmically similar to SHA-1 and so efforts are underway to develop improved alternatives.[3][4] A new hash standard, SHA-3, is currently under development — an ongoing NIST hash function competition is scheduled to end with the selection of a winning function in 2012.
Example 1
<?php
echo sha1('David Secret');
?>
Output
3d2ae5d64fc8af1b61c9986b03ec76625cdec61d
Example 2
- Use strcmp() function to compare two input strings.
<?php
$devid_secret='3d2ae5d64fc8af1b61c9986b03ec76625cdec61d';
if(strcmp(sha1('David Secret'),$devid_secret)==0)
{
echo 'You can login now!!';
}
else {
echo 'Illigal entry!!';
}
?>
Output
You can login now!!
Example 3
<?php $login_name = "[email protected]"; $password = 'y3c#@@$$$CCCC'; $loginPass = $login_name . $password; $top_secret1 = sha1($loginPass, TRUE); $top_secret2 = sha1($loginPass, FALSE); echo $top_secret1; echo '<br/>'; echo $top_secret2; ?>
Output
ÂuQ^Ï�RzZz†;]ˆ;” �†b c275515ecf1b527a5a7a863b5d883b940a128662
Example 4
- Using substr() function to cut string into 10 character lengths.
<?php $name = 'Tommy Tomm'; $top_secret = sha1($name); $top_10 = substr($top_secret, 0, 10); echo $top_secret; echo '<br/>'; echo $top_10; ?>
Output
e303d84226b03b9ccc5b5ae7cf1dabd09055f18b e303d84226
