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/*
* ZeroTier One - Global Peer to Peer Ethernet
* Copyright (C) 2012-2013 ZeroTier Networks LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#include <iostream>
#include <string.h>
#include <stdlib.h>
#include "Pack.hpp"
#include "BlobArray.hpp"
#include "Utils.hpp"
#include <openssl/sha.h>
namespace ZeroTier {
std::vector<const Pack::Entry *> Pack::getAll() const
{
std::vector<const Entry *> v;
for(std::map<std::string,Entry>::const_iterator e=_entries.begin();e!=_entries.end();++e)
v.push_back(&(e->second));
return v;
}
const Pack::Entry *Pack::get(const std::string &name) const
{
std::map<std::string,Entry>::const_iterator e(_entries.find(name));
return ((e == _entries.end()) ? (const Entry *)0 : &(e->second));
}
const Pack::Entry *Pack::put(const std::string &name,const std::string &content)
{
SHA256_CTX sha;
Pack::Entry &e = _entries[name];
e.name = name;
e.content = content;
SHA256_Init(&sha);
SHA256_Update(&sha,content.data(),content.length());
SHA256_Final(e.sha256,&sha);
e.signedBy.zero();
e.signature.assign((const char *)0,0);
return &e;
}
void Pack::clear()
{
_entries.clear();
}
std::string Pack::serialize() const
{
BlobArray archive;
for(std::map<std::string,Entry>::const_iterator e=_entries.begin();e!=_entries.end();++e) {
BlobArray entry;
entry.push_back(e->second.name);
entry.push_back(e->second.content);
entry.push_back(std::string((const char *)e->second.sha256,sizeof(e->second.sha256)));
entry.push_back(std::string((const char *)e->second.signedBy.data(),e->second.signedBy.size()));
entry.push_back(e->second.signature);
archive.push_back(entry.serialize());
}
std::string ser(archive.serialize());
std::string comp;
Utils::compress(ser.begin(),ser.end(),Utils::StringAppendOutput(comp));
return comp;
}
bool Pack::deserialize(const void *sd,unsigned int sdlen)
{
unsigned char dig[32];
SHA256_CTX sha;
std::string decomp;
if (!Utils::decompress(((const char *)sd),((const char *)sd) + sdlen,Utils::StringAppendOutput(decomp)))
return false;
BlobArray archive;
archive.deserialize(decomp.data(),decomp.length());
clear();
for(BlobArray::const_iterator i=archive.begin();i!=archive.end();++i) {
BlobArray entry;
entry.deserialize(i->data(),i->length());
if (entry.size() != 5) return false;
if (entry[2].length() != 32) return false; // SHA-256
if (entry[3].length() != ZT_ADDRESS_LENGTH) return false; // Address
Pack::Entry &e = _entries[entry[0]];
e.name = entry[0];
e.content = entry[1];
SHA256_Init(&sha);
SHA256_Update(&sha,e.content.data(),e.content.length());
SHA256_Final(dig,&sha);
if (memcmp(dig,entry[2].data(),32)) return false; // integrity check failed
memcpy(e.sha256,dig,32);
if (entry[3].length() == ZT_ADDRESS_LENGTH)
e.signedBy = entry[3].data();
else e.signedBy.zero();
e.signature = entry[4];
}
return true;
}
bool Pack::signAll(const Identity &id)
{
for(std::map<std::string,Entry>::iterator e=_entries.begin();e!=_entries.end();++e) {
e->second.signedBy = id.address();
e->second.signature = id.sign(e->second.sha256);
if (!e->second.signature.length())
return false;
}
return true;
}
std::vector<const Pack::Entry *> Pack::verifyAll(const Identity &id,bool mandatory) const
{
std::vector<const Entry *> bad;
for(std::map<std::string,Entry>::const_iterator e=_entries.begin();e!=_entries.end();++e) {
if ((e->second.signedBy)&&(e->second.signature.length())) {
if (id.address() != e->second.signedBy)
bad.push_back(&(e->second));
else if (!id.verifySignature(e->second.sha256,e->second.signature.data(),e->second.signature.length()))
bad.push_back(&(e->second));
} else if (mandatory)
bad.push_back(&(e->second));
}
return bad;
}
} // namespace ZeroTier
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