mirror of
https://github.com/OpenVPN/openvpn3.git
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72 lines
2.1 KiB
C++
72 lines
2.1 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) 2012-2020 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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#ifndef OPENVPN_AUTH_VALIDATE_CREDS_H
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#define OPENVPN_AUTH_VALIDATE_CREDS_H
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#include <openvpn/common/unicode.hpp>
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namespace openvpn {
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// Validate authentication credential.
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// Must be UTF-8.
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// Other checks on size and content below.
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// We don't check that the credential is non-empty.
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namespace ValidateCreds {
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enum Type {
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USERNAME,
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PASSWORD,
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RESPONSE
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};
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template <typename STRING>
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static bool is_valid(const Type type, const STRING& cred, const bool strict)
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{
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size_t max_len_flags;
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if (strict)
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{
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// length <= 512 unicode chars, no control chars allowed
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max_len_flags = 512 | Unicode::UTF8_NO_CTRL;
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}
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else
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{
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switch (type)
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{
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case USERNAME:
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// length <= 512 unicode chars, no control chars allowed
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max_len_flags = 512 | Unicode::UTF8_NO_CTRL;
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break;
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case PASSWORD:
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case RESPONSE:
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// length <= 16384 unicode chars
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max_len_flags = 16384;
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break;
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default:
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return false;
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}
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}
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return Unicode::is_valid_utf8(cred, max_len_flags);
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}
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}
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}
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#endif
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