PHP+openssl实现非对称加密

摘要：使用实现非对称加密私钥公钥保存文件地址公钥私钥创建公钥和私钥生成私钥生成公钥设置私钥从文件中获取设置公钥从文件中获取数据源用私钥加密

_keyPath = $path;
        }
    }

    /**
     * 创建公钥和私钥
     * 
     */
    public function createKey()
    {
        $config = [
            "config" => "D:MinInstallwampwamp64inphpphp5.6.25extrassslopenssl.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","
";
//私钥加密，公钥解密
echo "私钥加密,公钥验签","
";
echo "待加密数据：testInfo","
";
$pre = $rsa->privEncrypt("testInfo");
echo "加密后的密文:
" . $pre . "
";
$pud = $rsa->pubDecrypt($pre);
echo "解密后数据:" . $pud . "
";
echo "
";


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

echo "
";echo "
";

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