PHP实现RSA加解密算法(生成密钥位数为1024位的)

来源：互联网发布：java身份证校验编辑：程序博客网时间：2024/05/13 12:58

大家可以先到http://web.chacuo.net/netrsakeypair这个网站，在线生成公钥和私钥

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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