mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2025-04-26 08:57:26 +02:00
81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
/*
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* Copyright (c)2013-2020 ZeroTier, Inc.
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file in the project's root directory.
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*
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* Change Date: 2024-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2.0 of the Apache License.
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*/
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/****/
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#include "Tag.hpp"
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namespace ZeroTier {
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bool Tag::sign(const Identity &signer) noexcept
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{
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uint8_t buf[ZT_TAG_MARSHAL_SIZE_MAX];
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if (signer.hasPrivate()) {
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_signedBy = signer.address();
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_signatureLength = signer.sign(buf,(unsigned int)marshal(buf,true),_signature,sizeof(_signature));
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return true;
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}
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return false;
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}
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int Tag::marshal(uint8_t data[ZT_TAG_MARSHAL_SIZE_MAX],bool forSign) const noexcept
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{
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int p = 0;
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if (forSign) {
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for(int k=0;k<8;++k)
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data[p++] = 0x7f;
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}
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Utils::storeBigEndian<uint64_t>(data + p,_networkId); p += 8;
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Utils::storeBigEndian<uint64_t>(data + p,(uint64_t)_ts); p += 8;
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Utils::storeBigEndian<uint32_t>(data + p,_id); p += 4;
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Utils::storeBigEndian<uint32_t>(data + p,_value); p += 4;
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_issuedTo.copyTo(data + p); p += ZT_ADDRESS_LENGTH;
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_signedBy.copyTo(data + p); p += ZT_ADDRESS_LENGTH;
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if (!forSign) {
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data[p++] = 1;
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Utils::storeBigEndian<uint16_t>(data + p,(uint16_t)_signatureLength); p += 2;
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Utils::copy(data + p,_signature,_signatureLength);
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p += (int)_signatureLength;
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}
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data[p++] = 0;
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data[p++] = 0;
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if (forSign) {
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for(int k=0;k<8;++k)
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data[p++] = 0x7f;
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}
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return p;
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}
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int Tag::unmarshal(const uint8_t *data,int len) noexcept
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{
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if (len < 37)
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return -1;
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_networkId = Utils::loadBigEndian<uint64_t>(data);
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_ts = (int64_t)Utils::loadBigEndian<uint64_t>(data + 8);
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_id = Utils::loadBigEndian<uint32_t>(data + 16);
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_value = Utils::loadBigEndian<uint32_t>(data + 20);
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_issuedTo.setTo(data + 24);
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_signedBy.setTo(data + 29);
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// 1 byte reserved
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_signatureLength = Utils::loadBigEndian<uint16_t>(data + 35);
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int p = 37 + (int)_signatureLength;
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if ((_signatureLength > ZT_SIGNATURE_BUFFER_SIZE)||(p > len))
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return -1;
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Utils::copy(_signature,data + p,_signatureLength);
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if ((p + 2) > len)
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return -1;
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p += 2 + Utils::loadBigEndian<uint16_t>(data + p);
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if (p > len)
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return -1;
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return p;
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}
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} // namespace ZeroTier
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