PHP encrypts data using OpenSSL

1<?PHP2 /**3 * Created by Phpstorm.4 * User:hanks5 * date:6/2/20176 * time:6:03 PM7  */8 //using PHP functions to generate a key pair9 The //OPENSSL module provides a number of OpenSSL-related functions, and the reference manual generates key pairs in the following ways:Ten $privateKey=openssl_pkey_new ([ One' Private_key_bits ' = 2048,//size of private key A' Private_key_type ' = Openssl_keytype_rsa, - ]); -  theOpenssl_pkey_export_to_file ($privateKey, ' Php-private.key '); - $key= Openssl_pkey_get_details ($privateKey); - file_put_contents(' Php-public.key ',$key[' Key ']); -  +Openssl_free_key ($privateKey);//Freeing Resources

1<?PHP2 /**3 * Created by Phpstorm.4 * User:hanks5 * date:6/8/20176 * time:12:20 PM7  */8 //encrypt data using a key pair9 //Use the public key generated by the PHP function of the first step to fragment (chunk) The block of plaintext and then encrypt it (in real-life, all text can be encrypted directly):Ten //$plain = ' This is a test data '; One $plain= [ A0=>[ -' 0 ' = ' SD ', -' 1 ' = ' ' Make ' the], -1=>[ -' 0 ' = ' sd2 ', -' 1 ' = + ' makes 2 ' +], - ]; + Echo' Plian text: '. Json_encode ($plain,true); A $plain=gzcompress(Json_encode ($plain,true));//Compress Data at $pubkeyStr=file_get_contents('./php-public.key '); - $publicKey= Openssl_pkey_get_public ($pubkeyStr); -  - $p _key= Openssl_pkey_get_details ($publicKey); - $chunkSize=Ceil($p _key[' bits ']/8)-11;//I don't know why.-11, add explanation later. -  in $output= ' '; -  to  while($plain) { +     $chunk=substr($plain, 0,$chunkSize); -     $plain=substr($plain,$chunkSize); the  *     $encrypted= ' '; $     if(!openssl_public_encrypt ($chunk,$encrypted,$publicKey)) {Panax Notoginseng          die("Failed to encrypt data"); -     } the     $output.=$encrypted; + } AOpenssl_free_key ($publicKey); the $output=Base64_encode($output); + Echo' Encrypted: '. ($output); - file_put_contents('./enc.data ',$output);

1<?PHP2 /**3 * Created by Phpstorm.4 * User:hanks5 * date:6/8/20176 * time:12:22 PM7  */8 //Decrypt Data9 //Use the private key to decrypt the data:Ten $keyStr=file_get_contents('./php-private.key '); One if(!$privateKey= Openssl_pkey_get_private ($keyStr)) { A      die(' Get private key failed '); - } -  the $encrypted=file_get_contents('./enc.data '); - Echo' Encrypted data: '.$encrypted; -  - $encrypted=Base64_decode($encrypted); +  - $p _key= Openssl_pkey_get_details ($privateKey); + $chunkSize=Ceil($p _key[' bits ']/8); A $output= ' '; at  -  while($encrypted) { -     $chunk=substr($encrypted, 0,$chunkSize); -     $encrypted=substr($encrypted,$chunkSize); -     $decryptd= ' '; -     if(!openssl_private_decrypt ($chunk,$decryptd,$privateKey)) { in          die(' failed to decrypt data '); -     } to     $output.=$decryptd; + } -Openssl_free_key ($privateKey); the $output=gzuncompress($output); * Echo"\ndecrypted Data:"; $ Var_dump(Json_decode ($output,true));

PHP encrypts data using OpenSSL