mirror of
https://github.com/OpenVPN/openvpn3.git
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16b10559f2
OpenVPN Technologies, Inc. change their name to OpenVPN Inc. during the autumn of 2017. Signed-off-by: David Sommerseth <davids@openvpn.net>
118 lines
3.4 KiB
C++
118 lines
3.4 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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#ifndef OPENVPN_PKI_PKCS1_H
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#define OPENVPN_PKI_PKCS1_H
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#include <cstring>
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#include <openvpn/common/size.hpp>
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#include <openvpn/buffer/buffer.hpp>
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namespace openvpn {
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namespace PKCS1 {
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// from http://www.ietf.org/rfc/rfc3447.txt
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namespace DigestPrefix { // CONST GLOBAL
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namespace {
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const unsigned char MD2[] = { 0x30, 0x20, 0x30, 0x0c, 0x06, 0x08,
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0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d,
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0x02, 0x02, 0x05, 0x00, 0x04, 0x10 };
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const unsigned char MD5[] = { 0x30, 0x20, 0x30, 0x0c, 0x06, 0x08,
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0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d,
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0x02, 0x05, 0x05, 0x00, 0x04, 0x10 };
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const unsigned char SHA1[] = { 0x30, 0x21, 0x30, 0x09, 0x06, 0x05,
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0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x05,
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0x00, 0x04, 0x14 };
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const unsigned char SHA256[] = { 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09,
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0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
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0x04, 0x02, 0x01, 0x05, 0x00, 0x04,
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0x20 };
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const unsigned char SHA384[] = { 0x30, 0x41, 0x30, 0x0d, 0x06, 0x09,
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0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
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0x04, 0x02, 0x02, 0x05, 0x00, 0x04,
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0x30 };
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const unsigned char SHA512[] = { 0x30, 0x51, 0x30, 0x0d, 0x06, 0x09,
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0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
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0x04, 0x02, 0x03, 0x05, 0x00, 0x04,
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0x40 };
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}
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template <typename T>
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class Parse
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{
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public:
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Parse(const T none,
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const T md2,
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const T md5,
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const T sha1,
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const T sha256,
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const T sha384,
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const T sha512)
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: none_(none),
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md2_(md2),
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md5_(md5),
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sha1_(sha1),
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sha256_(sha256),
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sha384_(sha384),
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sha512_(sha512)
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{
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}
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T alg_from_prefix(Buffer& buf) const
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{
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if (match(buf, MD2, sizeof(MD2)))
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return md2_;
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else if (match(buf, MD5, sizeof(MD5)))
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return md5_;
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else if (match(buf, SHA1, sizeof(SHA1)))
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return sha1_;
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else if (match(buf, SHA256, sizeof(SHA256)))
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return sha256_;
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else if (match(buf, SHA384, sizeof(SHA384)))
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return sha384_;
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else if (match(buf, SHA512, sizeof(SHA512)))
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return sha512_;
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else
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return none_;
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}
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private:
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bool match(Buffer& buf, const unsigned char *data, const size_t size) const
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{
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if (buf.size() < size)
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return false;
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else if (std::memcmp(buf.c_data(), data, size) == 0)
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{
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buf.advance(size);
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return true;
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}
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else
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return false;
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}
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const T none_, md2_, md5_, sha1_, sha256_, sha384_, sha512_;
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};
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}
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}
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}
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#endif
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