Detailed explanation of certificate generation and encryption and decryption using OpenSSL in PHP

This article mainly introduces the use of OpenSSL to generate certificates and encryption and decryption in PHP. Friends who need it can refer to it

Depends on OpenSSL extension

/*加密解密*/
function authcode($string, $operation = 'E') {
  $ssl_public = file_get_contents(DATA_PATH."/conf/cert_public.key");
  $ssl_private = file_get_contents(DATA_PATH."/conf/cert_private.pem");
  $pi_key = openssl_pkey_get_private($ssl_private);//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
  $pu_key = openssl_pkey_get_public($ssl_public);//这个函数可用来判断公钥是否是可用的
  if(false == ($pi_key || $pu_key)) return '证书错误';
  $data = "";
  if($operation=='D'){
    openssl_private_decrypt(base64_decode($string),$data,$pi_key);//私钥解密
  }else{
    openssl_public_encrypt($string,$data,$pu_key);//公钥加密
    $data = base64_encode($data);
  }
  return $data;
}
/*生成证书*/
function exportOpenSSLFile(){
  $config = array(
    "digest_alg"    => "sha512",
    "private_key_bits" => 4096,           //字节数  512 1024 2048  4096 等
    "private_key_type" => OPENSSL_KEYTYPE_RSA,   //加密类型
  );
  $res = openssl_pkey_new($config);
  if($res == false) return false;
  openssl_pkey_export($res, $private_key);
  $public_key = openssl_pkey_get_details($res);
  $public_key = $public_key["key"];
  file_put_contents(DATA_PATH."/conf/cert_public.key",$public_key);
  file_put_contents(DATA_PATH."/conf/cert_private.pem",$private_key);
  openssl_free_key($res);
}

The above is the entire content of this article, I hope it will be helpful to everyone's study.

Related recommendations:

PHP implements using OpenSSL to generate certificates and encryption and decryption

PHP implemented DESEncryption and decryptionComplete method of encapsulation class

JS implementation of 3des base64Encryption and decryptionDetailed explanation of algorithm steps

The above is the detailed content of Detailed explanation of certificate generation and encryption and decryption using OpenSSL in PHP. For more information, please follow other related articles on the PHP Chinese website!