Example of rsa asymmetric encryption algorithm using openssl _ PHP Tutorial

Use openssl to implement rsa asymmetric encryption algorithm example. This article describes how to use openssl to implement rsa asymmetric encryption algorithms. For more information, see the following code :? Php *** use openssl to implement asymmetric encryption * @ since2010-07-08 * This article mainly introduces the example of using openssl to implement rsa asymmetric encryption algorithm.

The code is as follows: _ KeyPath = $ path;}/*** create the key pair, save the key to $ this-> _ keyPath */public function createKey () {$ r = openssl_pkey_new (); openssl_pkey_export ($ r, $ privKey); file_put_contents ($ this-> _ keyPath. DIRECTORY_SEPARATOR. 'priv. key ', $ privKey); $ this-> _ privKey = openssl_pkey_get_public ($ privKey); $ rp = openssl_pkey_get_details ($ r); $ pubKey = $ rp ['key']; file_put_contents ($ this-> _ keyPath. DI RECTORY_SEPARATOR. 'pub. key', $ pubKey); $ this-> _ pubKey = openssl_pkey_get_public ($ pubKey);}/*** setup the private key */public function setupPrivKey () {if (is_resource ($ this-> _ privKey) {return true;} $ file = $ this-> _ keyPath. DIRECTORY_SEPARATOR. 'priv. key'; $ prk = file_get_contents ($ file); $ this-> _ privKey = openssl_pkey_get_private ($ prk); return true;}/*** setup the public key */publi C function setupPubKey () {if (is_resource ($ this-> _ pubKey) {return true;} $ file = $ this-> _ keyPath. DIRECTORY_SEPARATOR. 'pub. key'; $ puk = file_get_contents ($ file); $ this-> _ pubKey = openssl_pkey_get_public ($ puk); return true ;} /*** encrypt with the private key */public function privEncrypt ($ data) {if (! Is_string ($ data) {return null;} $ this-> setupPrivKey (); $ r = openssl_private_encrypt ($ data, $ encrypted, $ this-> _ privKey ); if ($ r) {return base64_encode ($ encrypted);} return null;}/*** decrypt with the private key */public function privDecrypt ($ encrypted) {if (! Is_string ($ encrypted) {return null;} $ this-> setupPrivKey (); $ encrypted = base64_decode ($ encrypted); $ r = Encrypt ($ encrypted, $ decrypted, $ this-> _ privKey); if ($ r) {return $ decrypted;} return null;}/*** encrypt with public key */public function pubEncrypt ($ data) {if (! Is_string ($ data) {return null;} $ this-> setupPubKey (); $ r = openssl_public_encrypt ($ data, $ encrypted, $ this-> _ pubKey ); if ($ r) {return base64_encode ($ encrypted);} return null;}/*** decrypt with the public key */public function pubDecrypt ($ crypted) {if (! Is_string ($ crypted) {return null;} $ this-> setupPubKey (); $ crypted = base64_decode ($ crypted); $ r = openssl_public_decrypt ($ crypted, $ decrypted, $ this-> _ pubKey); if ($ r) {return $ decrypted;} return null;} public function _ destruct () {@ fclose ($ this-> _ privKey); @ fclose ($ this-> _ pubKey) ;}// The following is a simple test demo, delete $ rsa = new Rsa ('SSL-key') if not needed; // private key encryption, public key decryption echo 'Source: I'm a regular hacker
'; $ Pre = $ rsa-> privEncrypt (' I am a newbie '); echo 'private encrypted:
'. $ Pre .'
'; $ Pud = $ rsa-> pubDecrypt ($ pre); echo 'public decrypted:'. $ pud .'
'; // Public key encryption, private key decryption echo 'Source: dry IT
'; $ Pue = $ rsa-> pubEncrypt ('dry IT'); echo 'public encrypt:
'. $ Pue .'
'; $ Prd = $ rsa-> privDecrypt ($ pue); echo 'private decrypt:'. $ prd;?> Note that apache must support OpenSSL

The pipeline code is as follows :? Php/*** use openssl for asymmetric encryption * @ since 2010-07-08 *...