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// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012- OpenVPN Inc.
//
// SPDX-License-Identifier: MPL-2.0 OR AGPL-3.0-only WITH openvpn3-openssl-exception
//
// Wrap an OpenSSL X509 object
#pragma once
#include <string>
#include <vector>
#include <openssl/ssl.h>
#include <openssl/bio.h>
#include <openvpn/common/size.hpp>
#include <openvpn/common/numeric_cast.hpp>
#include <openvpn/common/exception.hpp>
#include <openvpn/openssl/util/error.hpp>
namespace openvpn::OpenSSLPKI {
class X509
{
using X509_unique_ptr = std::unique_ptr<::X509, decltype(&::X509_free)>;
public:
X509() = default;
X509(const std::string &cert_txt, const std::string &title)
{
parse_pem(cert_txt, title);
}
explicit X509(::X509 *x509, const bool create = true)
{
if (create)
x509_ = {x509, ::X509_free};
else
x509_ = {dup(x509), ::X509_free};
}
X509(const X509 &other)
: x509_{dup(other.x509_.get()), ::X509_free}
{
}
X509(X509 &&other) noexcept
: x509_(std::move(other.x509_))
{
}
X509 &operator=(const X509 &other)
{
if (this != &other)
{
x509_ = dup(other.x509_);
}
return *this;
}
X509 &operator=(X509 &&other) noexcept
{
if (this != &other)
{
x509_ = std::move(other.x509_);
}
return *this;
}
bool defined() const
{
return static_cast<bool>(x509_);
}
::X509 *obj() const
{
return x509_.get();
}
[[nodiscard]] ::X509 *obj_dup() const
{
return dup(x509_.get());
}
void parse_pem(const std::string &cert_txt, const std::string &title)
{
BIO *bio = ::BIO_new_mem_buf(const_cast<char *>(cert_txt.c_str()), numeric_cast<int>(cert_txt.length()));
if (!bio)
throw OpenSSLException();
::X509 *cert = ::PEM_read_bio_X509(bio, nullptr, nullptr, nullptr);
::BIO_free(bio);
if (!cert)
throw OpenSSLException(std::string("X509::parse_pem: error in ") + title + std::string(":"));
x509_ = {cert, X509_free};
}
[[nodiscard]] std::string render_pem() const
{
if (x509_)
{
BIO *bio = ::BIO_new(BIO_s_mem());
const int ret = ::PEM_write_bio_X509(bio, x509_.get());
if (ret == 0)
{
::BIO_free(bio);
throw OpenSSLException("X509::render_pem");
}
{
char *temp;
const auto buf_len = ::BIO_get_mem_data(bio, &temp);
std::string ret = std::string(temp, buf_len);
::BIO_free(bio);
return ret;
}
}
else
return "";
}
private:
static X509_unique_ptr dup(const X509_unique_ptr &x509)
{
if (x509)
{
::X509 *dup = ::X509_dup(const_cast<::X509 *>(x509.get()));
return {dup, ::X509_free};
}
else
{
return {nullptr, ::X509_free};
}
}
static ::X509 *dup(const ::X509 *x509)
{
if (x509)
return ::X509_dup(const_cast<::X509 *>(x509));
else
return nullptr;
}
X509_unique_ptr x509_{nullptr, ::X509_free};
};
class X509List : public std::vector<X509>
{
public:
typedef X509 Item;
bool defined() const
{
return !empty();
}
std::string render_pem() const
{
std::string ret;
for (const auto &e : *this)
ret += e.render_pem();
return ret;
}
};
} // namespace openvpn::OpenSSLPKI
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