时间:2021-07-01 10:21:17 帮助过:80人阅读
RSA非对称加密算法,如果是公钥加密,就得用私钥解密,反过来也一样,私钥加密的就用公钥解密,以下是相关实现函数
/** * RSA私钥加密 * @param string $private_key 私钥 * @param string $data 要加密的字符串 * @return string $encrypted 返回加密后的字符串 * @author mosishu */ function privateEncrypt($private_key,$data){ $encrypted = ''; $pi_key = openssl_pkey_get_private($private_key);//这个函数可用来判断私钥是否是可用的,可用返回资源id Resource id //最大允许加密长度为117,得分段加密 $plainData = str_split($data, 100);//生成密钥位数 1024 bit key foreach($plainData as $chunk){ $partialEncrypted = ''; $encryptionOk = openssl_private_encrypt($chunk,$partialEncrypted,$pi_key);//私钥加密 if($encryptionOk === false){ return false; } $encrypted .= $partialEncrypted; } $encrypted = base64_encode($encrypted);//加密后的内容通常含有特殊字符,需要编码转换下,在网络间通过url传输时要注意base64编码是否是url安全的 return $encrypted; }
/** * RSA公钥解密(私钥加密的内容通过公钥可以解密出来) * @param string $public_key 公钥 * @param string $data 私钥加密后的字符串 * @return string $decrypted 返回解密后的字符串 * @author mosishu */ function publicDecrypt($public_key,$data){ $decrypted = ''; $pu_key = openssl_pkey_get_public($public_key);//这个函数可用来判断公钥是否是可用的 $plainData = str_split(base64_decode($data), 128);//生成密钥位数 1024 bit key foreach($plainData as $chunk){ $str = ''; $decryptionOk = openssl_public_decrypt($chunk,$str,$pu_key);//公钥解密 if($decryptionOk === false){ return false; } $decrypted .= $str; } return $decrypted; }
//RSA公钥加密 function publicEncrypt($public_key,$data){ $encrypted = ''; $pu_key = openssl_pkey_get_public($public_key); $plainData = str_split($data, 100); foreach($plainData as $chunk){ $partialEncrypted = ''; $encryptionOk = openssl_public_encrypt($chunk,$partialEncrypted,$pu_key);//公钥加密 if($encryptionOk === false){ return false; } $encrypted .= $partialEncrypted; } $encrypted = base64_encode($encrypted); return $encrypted; }
//RSA私钥解密 function privateDecrypt($private_key,$data){ $decrypted = ''; $pi_key = openssl_pkey_get_private($private_key); $plainData = str_split(base64_decode($data), 128); foreach($plainData as $chunk){ $str = ''; $decryptionOk = openssl_private_decrypt($chunk,$str,$pi_key);//私钥解密 if($decryptionOk === false){ return false; } $decrypted .= $str; } return $decrypted; }
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