mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2025-04-25 16:36:54 +02:00
88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
/*
|
|
* Copyright (c)2013-2020 ZeroTier, Inc.
|
|
*
|
|
* Use of this software is governed by the Business Source License included
|
|
* in the LICENSE.TXT file in the project's root directory.
|
|
*
|
|
* Change Date: 2024-01-01
|
|
*
|
|
* On the date above, in accordance with the Business Source License, use
|
|
* of this software will be governed by version 2.0 of the Apache License.
|
|
*/
|
|
/****/
|
|
|
|
#include "Tag.hpp"
|
|
|
|
namespace ZeroTier {
|
|
|
|
bool Tag::sign(const Identity &signer) noexcept
|
|
{
|
|
uint8_t buf[ZT_TAG_MARSHAL_SIZE_MAX];
|
|
if (signer.hasPrivate()) {
|
|
m_signedBy = signer.address();
|
|
m_signatureLength = signer.sign(buf, (unsigned int) marshal(buf, true), m_signature, sizeof(m_signature));
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
int Tag::marshal(uint8_t data[ZT_TAG_MARSHAL_SIZE_MAX], bool forSign) const noexcept
|
|
{
|
|
int p = 0;
|
|
if (forSign) {
|
|
for (int k = 0;k < 8;++k)
|
|
data[p++] = 0x7f;
|
|
}
|
|
Utils::storeBigEndian<uint64_t>(data + p, m_networkId);
|
|
p += 8;
|
|
Utils::storeBigEndian<uint64_t>(data + p, (uint64_t) m_ts);
|
|
p += 8;
|
|
Utils::storeBigEndian<uint32_t>(data + p, m_id);
|
|
p += 4;
|
|
Utils::storeBigEndian<uint32_t>(data + p, m_value);
|
|
p += 4;
|
|
m_issuedTo.copyTo(data + p);
|
|
p += ZT_ADDRESS_LENGTH;
|
|
m_signedBy.copyTo(data + p);
|
|
p += ZT_ADDRESS_LENGTH;
|
|
if (!forSign) {
|
|
data[p++] = 1;
|
|
Utils::storeBigEndian<uint16_t>(data + p, (uint16_t) m_signatureLength);
|
|
p += 2;
|
|
Utils::copy(data + p, m_signature, m_signatureLength);
|
|
p += (int) m_signatureLength;
|
|
}
|
|
data[p++] = 0;
|
|
data[p++] = 0;
|
|
if (forSign) {
|
|
for (int k = 0;k < 8;++k)
|
|
data[p++] = 0x7f;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
int Tag::unmarshal(const uint8_t *data, int len) noexcept
|
|
{
|
|
if (len < 37)
|
|
return -1;
|
|
m_networkId = Utils::loadBigEndian<uint64_t>(data);
|
|
m_ts = (int64_t) Utils::loadBigEndian<uint64_t>(data + 8);
|
|
m_id = Utils::loadBigEndian<uint32_t>(data + 16);
|
|
m_value = Utils::loadBigEndian<uint32_t>(data + 20);
|
|
m_issuedTo.setTo(data + 24);
|
|
m_signedBy.setTo(data + 29);
|
|
// 1 byte reserved
|
|
m_signatureLength = Utils::loadBigEndian<uint16_t>(data + 35);
|
|
int p = 37 + (int) m_signatureLength;
|
|
if ((m_signatureLength > ZT_SIGNATURE_BUFFER_SIZE) || (p > len))
|
|
return -1;
|
|
Utils::copy(m_signature, data + p, m_signatureLength);
|
|
if ((p + 2) > len)
|
|
return -1;
|
|
p += 2 + Utils::loadBigEndian<uint16_t>(data + p);
|
|
if (p > len)
|
|
return -1;
|
|
return p;
|
|
}
|
|
|
|
} // namespace ZeroTier
|