class Rsa {
const RSA_ENCRYPT_BLOCK_SIZE = 117;//加密切割長度
const RSA_DECRYPT_BLOCK_SIZE = 128;//解密切割長度
/**
* @param $private_key私鑰
* @return false|resource
*/
public static function getPrivateKey($private_key)
{
// $abs_path = base_path().'/public/rsa/rsa_private_key.pem'; //私鑰檔案方式讀取
// $content = file_get_contents($abs_path);
// return openssl_pkey_get_private($content);
return openssl_pkey_get_private($private_key);
}
/**
* @param $public_key公鑰
* @return false|resource
*/
private static function getPublicKey($public_key)
{
// $abs_path = base_path().'/public/rsa/rsa_public_key.pem'; //公鑰檔案方式讀取
// $content = file_get_contents($abs_path);
// return openssl_pkey_get_public($content);
return openssl_pkey_get_public($public_key);
}
/**
* 私鑰加密
* @param $private_key私鑰字元
* @param string $content 加密字元串
* @return string|null
*/
public static function privEncrypt($private_key,$content = '')
{
if (!is_string($content)) {
return null;
}
$result='';
$data = str_split($content, self::RSA_ENCRYPT_BLOCK_SIZE);
foreach ($data as $block) {
openssl_private_encrypt($block, $dataEncrypt, self::getPrivateKey($private_key), OPENSSL_PKCS1_PADDING);
$result .= $dataEncrypt;
}
return $result ? base64_encode($result) : null;
}
/**
* 公鑰加密
* @param $public_key公鑰字元
* @param string $content 加密字元串
* @return string|null
*/
public static function publicEncrypt($public_key, $content = '')
{
if (!is_string($content)) {
return null;
}
$result='';
$data = str_split($content, self::RSA_ENCRYPT_BLOCK_SIZE);
foreach ($data as $block) {
openssl_public_encrypt($block, $dataEncrypt, self::getPublicKey($public_key), OPENSSL_PKCS1_PADDING);
$result .= $dataEncrypt;
}
return $result ? base64_encode($result) : null;
}
/**
* 私鑰解密
* @param $private_key私鑰
* @param string $encrypted解密字元串
* @return string|null
*/
public static function privDecrypt($private_key,$encrypted = '')
{
if (!is_string($encrypted)) {
return null;
}
$result = '';
$data = str_split(base64_decode($encrypted), self::RSA_DECRYPT_BLOCK_SIZE);
foreach ($data as $block) {
openssl_private_decrypt($block, $dataDecrypt, self::getPrivateKey($private_key), OPENSSL_PKCS1_PADDING);
$result .= $dataDecrypt;
}
return $result ? $result : null;
}
/**
* 公鑰解密
* @param $public_key公鑰
* @param string $encrypted解密字元串
* @return string|null
*/
public static function publicDecrypt($public_key,$encrypted = '')
{
if (!is_string($encrypted)) {
return null;
}
$result = '';
$data = str_split(base64_decode($encrypted), self::RSA_DECRYPT_BLOCK_SIZE);
foreach ($data as $block) {
openssl_public_decrypt($block, $dataDecrypt, self::getPublicKey($public_key), OPENSSL_PKCS1_PADDING);
$result .= $dataDecrypt;
}
return $result ? $result : null;
}
}