php和openssl实现非对称加密的代码示例

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<?php
namespace MyObjSummary;
/**
 * 使用openssl实现非对称加密
 */
class Rsa
{
    /**
* 私钥
* 
*/
    private $_privKey;

    /**
* 公钥
* 
*/
    private $_pubKey;

    /** 保存文件地址
* @var
*/
    private $_keyPath;

    /** 公钥
* @var string
*/
    private $_pubKeyLink = "-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCF4sz1eu4XgLeIK9Aiu4+rfglt
k1gmNhUytOtk3kbzPoy2XoR5sQIRXBYnIagwBVOLPWDacVJoqjfeK6xGvL17745u
Z7RubcZIW62ocgX3swIDAQAB
-----END PUBLIC KEY-----";
    /**私钥
* @var string
*/
    private $_priKeyLink = "-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----";
    /**
* Rsa constructor.
* @param string $path
*/
    public function __construct($path='')
    {
   if (!empty($path)) {
  $this->_keyPath = $path;
   }
    }

    /**
* 创建公钥和私钥
* 
*/
    public function createKey()
    {
   $config = [
  "config" => 'D:\Min\Install\wamp\wamp64\bin\php\php5.6.25\extras\ssl\openssl.cnf',
  "digest_alg" => "sha512",
  "private_key_bits" => 4096,
  "private_key_type" => OPENSSL_KEYTYPE_RSA,

   ];
   // 生成私钥
   $rsa = openssl_pkey_new($config);
   openssl_pkey_export($rsa, $privKey, NULL, $config);
   file_put_contents($this->_keyPath . DIRECTORY_SEPARATOR . 'priv.key', $privKey);
   $this->_privKey = openssl_pkey_get_public($privKey);
   // 生成公钥
   $rsaPri = openssl_pkey_get_details($rsa);
   $pubKey = $rsaPri['key'];
   file_put_contents($this->_keyPath . DIRECTORY_SEPARATOR . 'pub.key', $pubKey);
   $this->_pubKey = openssl_pkey_get_public($pubKey);
    }

    /** 设置私钥
* @return bool
*/
    public function setupPrivKey()
    {
   if (is_resource($this->_privKey)) {
  return true;
   }
   //从文件中获取
   /*$file = $this->_keyPath . DIRECTORY_SEPARATOR . 'priv.key';
   $privKey = file_get_contents($file);*/
   $privKey = $this->_priKeyLink;
   $this->_privKey = openssl_pkey_get_private($privKey);
   return true;
    }

    /** 设置公钥
* @return bool
*/
    public function setupPubKey()
    {
   //从文件中获取
   /*$file = $this->_keyPath . DIRECTORY_SEPARATOR . 'pub.key';
   $pubKey = file_get_contents($file);*/
   //数据源
   $pubKey = $this->_pubKeyLink;
   $this->_pubKey = openssl_pkey_get_public($pubKey);
   return true;
    }

    /** 用私钥加密
* @param $data
* @return null|string
*/
    public function privEncrypt($data)
    {
   if (!is_string($data)) {
  return null;
   }
   $this->setupPrivKey();
   $result = openssl_private_encrypt($data, $encrypted, $this->_privKey);
   if ($result) {
  return base64_encode($encrypted);
   }
   return null;
    }

    /** 私钥解密
* @param $encrypted
* @return null
*/
    public function privDecrypt($encrypted)
    {
   if (!is_string($encrypted)) {
  return null;
   }
   $this->setupPrivKey();
   $encrypted = base64_decode($encrypted);
   $result = openssl_private_decrypt($encrypted, $decrypted, $this->_privKey);
   if ($result) {
  return $decrypted;
   }
   return null;
    }

    /** 公钥加密
* @param $data
* @return null|string
*/
    public function pubEncrypt($data)
    {
   if (!is_string($data)) {
  return null;
   }
   $this->setupPubKey();
   $result = openssl_public_encrypt($data, $encrypted, $this->_pubKey);
   if ($result) {
  return base64_encode($encrypted);
   }
   return null;
    }

    /** 公钥解密
* @param $crypted
* @return null
*/
    public function pubDecrypt($crypted)
    {
   if (!is_string($crypted)) {
  return null;
   }
   $this->setupPubKey();
   $crypted = base64_decode($crypted);
   $result = openssl_public_decrypt($crypted, $decrypted, $this->_pubKey);
   if ($result) {
  return $decrypted;
   }
   return null;
    }

    /** 私钥签名
* @param $data
* @return string
*/
    public function priKeySign($data)
    {
   if(!is_string($data)) return null;
   $private_key=openssl_get_privatekey($this->_priKeyLink);
   $original_str= $data ;//原数据
   openssl_sign($original_str,$sign,$private_key);
   openssl_free_key($private_key);
   $sign=base64_encode($sign);//最终的签名
   return $sign ;
    }

    /** 公钥验签
* @param $sign
* @param $data
* @return bool
*/
    public  function pubKeyCheck($sign,$data)
    {
   if(!is_string($sign) || !is_string($data)) return null;
   $public_key=openssl_get_publickey($this->_pubKeyLink);
   $sign=base64_decode($sign);//得到的签名
   $original_str=$data;
   $result=(bool)openssl_verify($original_str,$sign,$public_key);
   openssl_free_key($public_key);
   return $result ;
    }

    /**
* __destruct
* 
*/
    public function __destruct() {
   @fclose($this->_privKey);
   @fclose($this->_pubKey);
    }
}
$rsa = new Rsa();

echo "openssl_private_encrypt,openssl_public_decrypt","<br />";
//私钥加密，公钥解密
echo "私钥加密,公钥验签","<br />";
echo "待加密数据：testInfo","<br />";
$pre = $rsa->privEncrypt("testInfo");
echo "加密后的密文:<br />" . $pre . "<br />";
$pud = $rsa->pubDecrypt($pre);
echo "解密后数据:" . $pud . "<br />";
echo "<hr>";


//公钥加密，私钥解密
echo "openssl_public_encrypt,openssl_private_decrypt","<br />";
echo "公钥加密，私钥验签","<br />";
echo "待加密数据：ssh-test","<br />";
$pue = $rsa->pubEncrypt("ssh-test");
echo "加密后的密文:","<br />" . $pue . "<br />";
$prd = $rsa->privDecrypt($pue);
echo "解密后数据:" . $prd;

echo "<hr>";echo "<hr>";

echo "openssl_sign,openssl_verify","<br />";
echo "私钥签名,公钥验签","<br />";
echo "待加密数据：test=32","<br />";
$pre = $rsa->priKeySign('test=32');
echo "加密后的密文:","<br />" . $pre . "<br />";
$pud = $rsa->pubKeyCheck($pre,'test=32');
echo "是否解密成功:" . $pud . "<br />";
echo "<hr>";

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