PHP-RSA加密解密，支持分段解密

<?php /** * RSA加密解密 * @author jetking <www.xibotu.com> */ class Rsa { private static $PRIVATE_KEY = '-----BEGIN PRIVATE KEY----- xDSN79RE9lZBKHD7r6uX2ovyqFVcqhOawsZMVq9UjZEahRuZZSfGlzwqO84PdfRE YzCMX71R5bevJP37R5fBX4fZ22hMloFNNdokiYZ4l4ZJ4ooBWeGdGqRsHW3z3fE3 ... ... VnlUPzRTggamditCVYaoNNqMuBtV7PsRZtZWV2UV7WSSioExcuKixBPYCmJpMXKV 138YMtyf9DCZYgX7wuNmCqQMfJGvnfRKfLp5ks0iZhqdi4gP0hdINAyCZXzMwswc Xa5ULb6LHyYk -----END PRIVATE KEY-----'; private static $PUBLIC_KEY = '-----BEGIN PUBLIC KEY----- pqYokHJS6TELqPPFPWzrV3F0WuLfWymrv9DWldmy9V0j3ITnGUidRACzIiCggvBX ... ... pDoaIVXCPIUFZ7dFi0cjho5FZoUGf6jgQG0BeFTHbY3HAcfDGiOAWD4e4DCYt3Eb wdpFDxpbN5opKjOGNL45CLGU -----END PUBLIC KEY-----'; /** *返回对应的私钥 */ private static function getPrivateKey(){ $privKey = self::$PRIVATE_KEY; return openssl_pkey_get_private($privKey); } /** *返回对应的私钥 */ private static function getPublicKey(){ $publicKey = self::$PUBLIC_KEY; return openssl_pkey_get_public($publicKey); } /** * 私钥加密 */ public static function privEncrypt($data) { if(!is_string($data)){ return null; } return openssl_private_encrypt($data,$encrypted,self::getPrivateKey())? base64_encode($encrypted) : null; } /** * 私钥解密 */ public static function privDecrypt($encrypted) { if(!is_string($encrypted)){ return null; } return (openssl_private_decrypt(base64_decode($encrypted), $decrypted, self::getPrivateKey()))? $decrypted : null; } /** * 公钥解密 */ public static function publicDecrypt($encrypted) { if(!is_string($encrypted)){ return null; } return (openssl_public_decrypt(base64_decode($encrypted), $decrypted, self::getPublicKey()))? $decrypted : null; } /** * 私钥解密,不做Base64解码 * @param unknown $encrypted * @return NULL|Ambigous <unknown, NULL> */ public static function privDecryptNB64($encrypted) { if(!is_string($encrypted)){ return null; } return (openssl_private_decrypt($encrypted, $decrypted, self::getPrivateKey()))? $decrypted : null; } /** * 分段私钥解密 * @param string $encrypted * @return Ambigous <string, NULL, Ambigous> */ public static function partPrivDecrypt($encrypted){ $encrypted = base64_decode($encrypted); $fiveMBs = 50 * 1024 * 1024; // $file = FCPATH. 'jktest_'.time().'.txt'; $fp = fopen("php://memory",'w+b'); fwrite($fp, $encrypted); fseek($fp, 0); $bContent = ''; while (!feof($fp)) { $bContent .= self::privDecryptNB64(fread($fp, 128)); } fclose($fp); // unlink($file); return $bContent; } }