需要先了解的openssl系列函数
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- openssl_pkey_get_private 从证书中解析获取私钥，以供使用。成功，返回真实的密钥资源标识符(Resource ID),否则返回false
- openssl_pkey_get_public 从证书中解析获取公钥，以供使用。成功，返回真实的密钥资源标识符(Resource ID),否则返回false
- openssl_private_encrypt($data, $encrypted, $privateKeyResourceID, OPENSSL_PKCS1_PADDING)
- //使用私钥key加密数据data并且将结果保存至变量crypted中
- openssl_public_decrypt(base64_decode($encrypted), $decrypted, $publicKeyResourceID, OPENSSL_PKCS1_PADDING)
- //私钥加密的内容通过公钥可用解密出来
getMessage());
}加密、解密系列
- 公钥加密 openssl_public_encrypt,私钥解密 openssl_private_decrypt
- 私钥加密 openssl_private_encrypt,公钥解密 openssl_public_decrypt
checkFilePath($publicKeyPath);
$this->checkFilePath($privatePath);
$this->publicKeyContent = file_get_contents($publicKeyPath);
$this->privateKeyContent = file_get_contents($privatePath);
if (empty($this->publicKeyContent)) throw new \Exception('Public key is empty');
if (empty($this->privateKeyContent)) throw new \Exception('Private key is empty');
$this->publicKeyResourceID = !empty($this->publicKeyContent) ? openssl_pkey_get_public($this->getPublicKey()) : false;
$this->privateKeyresourceID = !empty($this->privateKeyContent) ? openssl_pkey_get_private($this->getPrivatekey()) : false;
if ($this->publicKeyResourceID === false) throw new \Exception('解析公钥内容失败');
if ($this->privateKeyresourceID === false) throw new \Exception('解析私钥内容失败');
}
/**
* 校验文件路径
* @param string $filePath
* @throws Exception
*/
public function checkFilePath(string $filePath)
{
if (!is_file($filePath)) throw new \Exception($filePath . ' is not a regular file');
if (!file_exists($filePath)) throw new \Exception($filePath . ' is not exists');
}
//获取私有key字符串,重新格式化,为保证任何key都可以识别
public function getPrivatekey(): string
{
$search = [
"-----BEGIN RSA PRIVATE KEY-----",
"-----END RSA PRIVATE KEY-----",
"\n",
"\r",
"\r\n"
];
$privateKey = str_replace($search, "", $this->privateKeyContent);
//打断字符串为指定数量的字串
return $search[0] . PHP_EOL . wordwrap($privateKey, 64, "\n", true) . PHP_EOL . $search[1];
}
/**
*
* 获取公共key字符串,重新格式化,为保证任何key都可以识别
*/
public function getPublicKey()
{
$search = [
"-----BEGIN PUBLIC KEY-----",
"-----END PUBLIC KEY-----",
"\n",
"\r",
"\r\n"
];
$publicKey = str_replace($search, "", $this->publicKeyContent);
//打断字符串为指定数量的字串
return $search[0] . PHP_EOL . wordwrap($publicKey, 64, "\n", true) . PHP_EOL . $search[1];
}
public function createKey()
{
$result = openssl_pkey_new();// 生成一个新的私钥和公钥对,
if ($result === false) return false;
openssl_pkey_export($result, $privateKey);//将key当作PEM编码字符串导出并且将之保存到$privateKey(通过引用传递的)中。
$publicKey = openssl_pkey_get_details($result);//返回包含密钥详情的数组
return array('public_key' => $publicKey["key"], 'private_key' => $this->getPrivatekey());
}
//使用私钥加密
public function encryptByPrivateKey(string $data): string
{
openssl_private_encrypt($data, $output, $this->privateKeyresourceID);
return base64_encode($output);
}
//使用公钥解密
public function decryptByPublicKey(string $data): string
{
openssl_public_decrypt(base64_decode($data), $output, $this->publicKeyResourceID);
return $output;
}
//使用公钥加密
public function encryptByPublicKey(string $data): string
{
openssl_public_encrypt($data, $output, $this->publicKeyResourceID);
return base64_encode($output);
}
//使用私钥解密
public function decryptByPrivateKey(string $data): string
{
openssl_private_decrypt(base64_decode($data), $output, $this->privateKeyresourceID);
return $output;
}
//生成签名
public function generateSignature(string $data, int $signType = OPENSSL_ALGO_SHA1): string
{
openssl_sign($data, $outSignature, $this->privateKeyresourceID, $signType);//Generate signature
return base64_encode($outSignature);
}
//校验签名 OPENSSL_ALGO_SHA256为RSA2
public function checkSignature(string $originalData, string $signature, int $signType = OPENSSL_ALGO_SHA1): bool
{
//如果签名正确返回 1, 签名错误返回 0, 内部发生错误则返回-1
$result = openssl_verify($originalData, base64_decode($signature), $this->publicKeyResourceID, $signType);
return $result == 1;
}
public function __destruct()
{
openssl_free_key($this->publicKeyResourceID);
openssl_free_key($this->privateKeyresourceID);
}
}
$rsaObj = new RSA('/home/zrj/.ssh/rsa_public.key', '/home/zrj/.ssh/rsa_private.key');
$str = 'Hello world';
echo '原始数据:' . $str . PHP_EOL;
echo '公钥加密私钥解密如下:' . PHP_EOL;
$tmpstr = $rsaObj->encryptByPublicKey($str); //用公钥加密
echo '加密后的数据:' . PHP_EOL;
echo $tmpstr . PHP_EOL;
$tmpstr = $rsaObj->decryptByPrivateKey($tmpstr); //用私钥解密
echo '解密结果:' . $tmpstr . PHP_EOL;
echo PHP_EOL;
echo PHP_EOL;
echo '私钥加密公钥解密如下:' . PHP_EOL;
$tmpstr = $rsaObj->encryptByPrivateKey($str); //用私钥加密
echo '私钥加密后的数据:' . PHP_EOL;
echo $tmpstr . PHP_EOL;
$tmpstr = $rsaObj->decryptByPublicKey($tmpstr); //用公钥解密
echo '公钥解密结果:' . $tmpstr . PHP_EOL;
echo PHP_EOL;
echo PHP_EOL;
$signature = $rsaObj->generateSignature($tmpstr);
echo '签名结果为：' . $signature . PHP_EOL;
var_dump($rsaObj->checkSignature($tmpstr, $signature));
