Encrypt using public key, decrypt using private key.
Use this to store stuff in your database: Unless someone
has your private key, the database contents are useless.
Also, use this for sending to a specific individual: Get
their public key, encrypt the message, only they can use
their private key to decode it.
<?php
echo "Source: $source";
$fp=fopen("/path/to/certificate.crt","r");
$pub_key=fread($fp,8192);
fclose($fp);
openssl_get_publickey($pub_key);
/*
* NOTE: Here you use the $pub_key value (converted, I guess)
*/
openssl_public_encrypt($source,$crypttext,$pub_key);
echo "String crypted: $crypttext";
$fp=fopen("/path/to/private.key","r");
$priv_key=fread($fp,8192);
fclose($fp);
// $passphrase is required if your key is encoded (suggested)
$res = openssl_get_privatekey($priv_key,$passphrase);
/*
* NOTE: Here you use the returned resource value
*/
openssl_private_decrypt($crypttext,$newsource,$res);
echo "String decrypt : $newsource";
?>
openssl_private_decrypt
(PHP 4 >= 4.0.6, PHP 5, PHP 7)
openssl_private_decrypt — Decrypts data with private key
Description
openssl_private_decrypt
( string
$data
, string &$decrypted
, mixed $key
[, int $padding = OPENSSL_PKCS1_PADDING
] ) : bool
openssl_private_decrypt() decrypts
data that was previously encrypted via
openssl_public_encrypt() and stores the result into
decrypted.
You can use this function e.g. to decrypt data which is supposed to only be available to you.
Parameters
-
data -
-
decrypted -
-
key -
keymust be the private key corresponding that was used to encrypt the data. -
padding -
paddingcan be one ofOPENSSL_PKCS1_PADDING,OPENSSL_SSLV23_PADDING,OPENSSL_PKCS1_OAEP_PADDING,OPENSSL_NO_PADDING.
Return Values
Returns TRUE on success or FALSE on failure.
See Also
- openssl_public_encrypt() - Encrypts data with public key
- openssl_public_decrypt() - Decrypts data with public key
add a note
User Contributed Notes 2 notes
wfredkNOSPAM at L5DevelopmentNOSPAM dot com ¶
17 years ago
tjusongchao at gmail dot com ¶
4 years ago
of course you have to add the openssl extension to you php environment.
