RSA加密解密算法
/**
* RSA加密解密算法
* Class Rsa
*/
class Rsa
{
/**
* 获取pem格式的公钥
* @param $public_key 公钥⽂件路径或者字符串
* @return bool|mixed|string
*/
public static function public_key($public_key)
{
try{
// 先判断是否是⽂件
$suffix = pathinfo($public_key,PATHINFO_EXTENSION);
if(!empty($suffix) && is_file($public_key)){
$public_key = file_get_contents($public_key);
}
if(false === strpos($public_key, '-----')){
$public_key = str_replace("\n", "", $public_key);
$public_key = "-----BEGIN PUBLIC KEY-----\n" . chunk_split($public_key, 64, "\n") . "-----END PUBLIC KEY-----";
}
}catch (\Exception$e){
$public_key = '';
}
return$public_key;
}
/**
* 获取pem格式的私钥
* @param $private_key 私钥⽂件路径或者字符串
* @return bool|mixed|string
*/
public static function private_key($private_key, $key_password='')
{
try{
// 先判断是否是⽂件
$suffix = pathinfo($private_key,PATHINFO_EXTENSION);
if(!empty($suffix) && is_file($private_key)){
$private_key = file_get_contents($private_key);
}
if(false === strpos($private_key, '-----')){
$private_key = str_replace("\n", "", $private_key);
if(empty($key_password)){
$private_key = "-----BEGIN PRIVATE KEY-----\n" . chunk_split($private_key, 64, "\n") . "-----END PRIVATE KEY-----";
}else{
$private_key = "-----BEGIN ENCRYPTED PRIVATE KEY-----\n" . chunk_split($private_key, 64, "\n") . "-----END ENCRYPTED PRIVATE KEY-----";                }
}
}catch (\Exception$e){
$private_key = '';
}
return$private_key;
}
/**
* RSA公钥加密
* @param $decrypted 待加密字符串
* @param $public_key 公钥
* @return bool|string
*/
public static function public_encrypt($decrypted, $public_key)
{
try{
$public_key = self::public_key($public_key);
$publicKey = openssl_pkey_get_public($public_key); //这个函数可⽤来判断公钥是否是可⽤的，可⽤返回资源id Resource id
if(!$publicKey) return false;
$decrypted = str_split($decrypted, 117);
$encrypted = '';
foreach ($decrypted as$decrypt){
$encrypt = '';
openssl_public_encrypt($decrypt, $encrypt, $publicKey);//公钥加密
$encrypted .= $encrypt; //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
$encrypted = base64_encode($encrypted);
openssl_free_key($publicKey);
unset($decrypted, $public_key, $publicKey, $decrypt, $encrypt);
}catch (\Exception$e){
$encrypted = '';
}
return$encrypted;
}
/**
* RSA私钥加密
* @param $decrypted 待加密字符串
* @param $private_key 私钥
* @return bool|string
*/
public static function private_encrypt($decrypted, $private_key, $key_password='')
{
try {
$private_key = self::private_key($private_key, $key_password);
$privateKey = openssl_pkey_get_private($private_key, $key_password); //这个函数可⽤来判断私钥是否是可⽤的，可⽤返回资源id Resource id if (!$privateKey) return false;
$decrypted = str_split($decrypted, 117);
$encrypted = '';
foreach ($decrypted as$decrypt) {
$encrypt = '';
openssl_private_encrypt($decrypt, $encrypt, $privateKey);//公钥加密
$encrypted .= $encrypt; //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
}
$encrypted = base64_encode($encrypted);
openssl_free_key($privateKey);
unset($decrypted, $private_key, $privateKey, $decrypt, $encrypt);
签名字符串是什么}catch (\Exception$e){
$encrypted = '';
}
return$encrypted;
}
/**
* RSA公钥解密
* @param $encrypted 待解密密⽂
* @param $public_key 公钥
* @param string $key_password 证书密码
* @return bool|string
*/
public static function public_decrypt($encrypted, $public_key)
{
try{
$public_key = self::public_key($public_key);
$publicKey = openssl_pkey_get_public($public_key); //这个函数可⽤来判断公钥是否是可⽤的，可⽤返回资源id Resource id
if(!$publicKey) return false;
$encrypted = str_split(base64_decode($encrypted), 128);
$decrypted = '';
foreach ($encrypted as$encrypt){
$decrypt = '';
openssl_public_decrypt($encrypt, $decrypt, $publicKey);//私钥解密
$decrypted .= $decrypt;
}
openssl_free_key($publicKey);
unset($encrypted, $public_key, $publicKey, $encrypt, $decrypt);
}catch (\Exception$e){
$decrypted = '';
}
return$decrypted;
}
/**
* RSA私钥解密
* @param $encrypted 待解密密⽂
* @param $private_key 私钥
* @param string $key_password 证书密码
* @return bool|string
*/
public static function private_decrypt($encrypted, $private_key, $key_password='')
{
$private_key = self::private_key($private_key, $key_password);
$privateKey = openssl_pkey_get_private($private_key, $key_password); //这个函数可⽤来判断私钥是否是可⽤的，可⽤返回资源id Resource id if(!$privateKey) return false;
$encrypted = str_split(base64_decode($encrypted), 128);
$decrypted = '';
foreach ($encrypted as$encrypt){
$decrypt = '';
openssl_private_decrypt($encrypt, $decrypt, $privateKey);//私钥解密
$decrypted .= $decrypt;
}
openssl_free_key($privateKey);
unset($encrypted, $private_key, $privateKey, $encrypt, $decrypt);
}catch (\Exception$e){
$decrypted = '';
}
return$decrypted;
}
/**
* 私钥⽣成签名
* @param $string 待签名字符串
* @param $private_key 私钥
* @param string $key_password 证书密码
* @return bool|string
*/
public static function sign($string, $private_key, $key_password='')
{
try{
$private_key = self::private_key($private_key, $key_password);
$privateKey = openssl_pkey_get_private($private_key, $key_password); //这个函数可⽤来判断私钥是否是可⽤的，可⽤返回资源id Resource id if(!$privateKey) return false;
openssl_sign($string, $sign, $privateKey);
openssl_free_key($privateKey);
$sign = base64_encode($sign);//最终的签名
unset($string, $private_key, $key_password, $privateKey);
}catch (\Exception$e){
$sign = '';
}
return$sign;
}
/**
* 公钥校验签名
* @param $string 待签名字符串
* @param $sign 签名
* @param $public_key 公钥
* @return bool
*/
public static function verify($string, $sign, $public_key)
{
try{
$public_key = self::public_key($public_key);
$publicKey = openssl_pkey_get_public($public_key); //这个函数可⽤来判断公钥是否是可⽤的，可⽤返回资源id Resource id
if(!$publicKey) return false;
$sign = base64_decode($sign);//得到的签名
$result = openssl_verify($string, $sign, $publicKey);
openssl_free_key($publicKey);
unset($string, $sign, $public_key, $publicKey);
}catch (\Exception$e){
$result = 0;
}
return$result === 1 ? true : false;
}
}

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