openssl_pkey_new
When used with RSA, this function only accepts a single block. Block size is equal to the RSA key size - i. e., with a 1024-bit key, block size should be 128 bytes. Depending on the padding scheme, the payload may be even smaller. The padding is removed, so you'll receive the ready to use plaintext. Blocking logic is up to the caller, though.
When passing Microsoft CryptoAPI-generated RSA cyphertext, revert the bytes in the block (you may use strrev()).
openssl_private_decrypt
(PHP 4 >= 4.0.6, PHP 5)
openssl_private_decrypt — Decrypts data with private key
Description
bool openssl_private_decrypt
( string $data
, string &$decrypted
, mixed $key
[, int $padding = OPENSSL_PKCS1_PADDING
] )
openssl_private_decrypt() decrypts data that was previous encrypted via openssl_public_encrypt() and stores the result into decrypted .
You can use this function e.g. to decrypt data which were supposed only to you.
Parameters
- data
-
- decrypted
-
- key
-
key must be the private key corresponding that was used to encrypt the data.
- padding
-
padding defaults to OPENSSL_PKCS1_PADDING, but can also be one of 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 Notesopenssl_private_decrypt
sevaa at sprynet dot com
03-Oct-2009 02:08
03-Oct-2009 02:08
wfredkNOSPAM at L5DevelopmentNOSPAM dot com
08-Mar-2002 11:58
08-Mar-2002 11:58
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";
?>