mirror of
https://github.com/deneraraujo/OpenVPNAdapter.git
synced 2026-02-11 00:00:08 +08:00
142 lines
4.0 KiB
C++
142 lines
4.0 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2017 OpenVPN Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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// mbed TLS exception class that allows a error code
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// to be represented.
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#ifndef OPENVPN_MBEDTLS_UTIL_ERROR_H
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#define OPENVPN_MBEDTLS_UTIL_ERROR_H
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#include <string>
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#include <mbedtls/ssl.h>
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#include <mbedtls/pem.h>
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#include <mbedtls/error.h>
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#include <openvpn/common/exception.hpp>
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#include <openvpn/error/error.hpp>
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#include <openvpn/error/excode.hpp>
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namespace openvpn {
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// string exception class
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class MbedTLSException : public ExceptionCode
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{
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public:
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MbedTLSException()
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{
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errnum = 0;
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errtxt = "mbed TLS";
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}
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explicit MbedTLSException(const std::string& error_text)
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{
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errnum = 0;
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errtxt = "mbed TLS: " + error_text;
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}
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explicit MbedTLSException(const std::string& error_text, const Error::Type code, const bool fatal)
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: ExceptionCode(code, fatal)
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{
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errnum = 0;
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errtxt = "mbed TLS: " + error_text;
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}
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explicit MbedTLSException(const std::string& error_text, const int mbedtls_errnum)
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{
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errnum = mbedtls_errnum;
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errtxt = "mbed TLS: " + error_text + " : " + mbedtls_errtext(mbedtls_errnum);
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// cite forum URL for mbed TLS invalid date
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// TODO: Get a better URL for such knowledge information record
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if (mbedtls_errnum == MBEDTLS_ERR_X509_INVALID_DATE)
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errtxt += ", please see https://forums.openvpn.net/viewtopic.php?f=36&t=21873 for more info";
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// for certain mbed TLS errors, translate them to an OpenVPN error code,
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// so they can be propagated up to the higher levels (such as UI level)
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switch (errnum) {
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case MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:
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set_code(Error::CERT_VERIFY_FAIL, true);
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break;
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case MBEDTLS_ERR_PK_PASSWORD_REQUIRED:
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case MBEDTLS_ERR_PK_PASSWORD_MISMATCH:
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set_code(Error::PEM_PASSWORD_FAIL, true);
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break;
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case MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION:
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set_code(Error::TLS_VERSION_MIN, true);
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break;
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}
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}
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virtual const char* what() const throw() { return errtxt.c_str(); }
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std::string what_str() const { return errtxt; }
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int get_errnum() const { return errnum; }
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virtual ~MbedTLSException() throw() {}
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static std::string mbedtls_errtext(int errnum)
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{
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char buf[256];
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mbedtls_strerror(errnum, buf, sizeof(buf));
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return buf;
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}
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static std::string mbedtls_verify_flags_errtext(const uint32_t flags)
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{
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// get string rendition of flags
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const size_t BUF_SIZE = 1024;
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std::unique_ptr<char[]> buf(new char[BUF_SIZE]);
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buf[0] = '\0';
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mbedtls_x509_crt_verify_info(buf.get(), BUF_SIZE, "", flags);
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// postprocess string
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std::string ret;
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ret.reserve(std::strlen(buf.get()) + 64);
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bool newline = false;
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for (size_t i = 0; i < BUF_SIZE; ++i)
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{
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const char c = buf[i];
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if (c == '\0')
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break;
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else if (c == '\n')
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newline = true;
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else
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{
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if (newline)
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{
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ret += ", ";
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newline = false;
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}
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ret += c;
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}
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}
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return ret;
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}
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private:
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std::string errtxt;
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int errnum;
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};
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}
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#endif
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