mirror of
https://github.com/oxen-io/lokinet.git
synced 2024-11-15 12:13:24 +00:00
345 lines
8.8 KiB
C++
345 lines
8.8 KiB
C++
#include <service/intro_set.hpp>
|
|
#include <crypto/crypto.hpp>
|
|
#include <path/path.hpp>
|
|
|
|
namespace llarp
|
|
{
|
|
namespace service
|
|
{
|
|
util::StatusObject
|
|
EncryptedIntroSet::ExtractStatus() const
|
|
{
|
|
const auto sz = introsetPayload.size();
|
|
return {{"location", derivedSigningKey.ToString()},
|
|
{"signedAt", to_json(signedAt)},
|
|
{"size", sz}};
|
|
}
|
|
|
|
bool
|
|
EncryptedIntroSet::BEncode(llarp_buffer_t* buf) const
|
|
{
|
|
if(not bencode_start_dict(buf))
|
|
return false;
|
|
if(not BEncodeWriteDictEntry("d", derivedSigningKey, buf))
|
|
return false;
|
|
if(not BEncodeWriteDictEntry("n", nounce, buf))
|
|
return false;
|
|
if(not BEncodeWriteDictInt("s", signedAt.count(), buf))
|
|
return false;
|
|
if(not bencode_write_bytestring(buf, "x", 1))
|
|
return false;
|
|
if(not bencode_write_bytestring(buf, introsetPayload.data(),
|
|
introsetPayload.size()))
|
|
return false;
|
|
if(not BEncodeWriteDictEntry("z", sig, buf))
|
|
return false;
|
|
return bencode_end(buf);
|
|
}
|
|
|
|
bool
|
|
EncryptedIntroSet::DecodeKey(const llarp_buffer_t& key, llarp_buffer_t* buf)
|
|
{
|
|
bool read = false;
|
|
if(key == "x")
|
|
{
|
|
llarp_buffer_t strbuf;
|
|
if(not bencode_read_string(buf, &strbuf))
|
|
return false;
|
|
if(strbuf.sz > MAX_INTROSET_SIZE)
|
|
return false;
|
|
introsetPayload.resize(strbuf.sz);
|
|
std::copy_n(strbuf.base, strbuf.sz, introsetPayload.data());
|
|
return true;
|
|
}
|
|
if(not BEncodeMaybeReadDictEntry("d", derivedSigningKey, read, key, buf))
|
|
return false;
|
|
|
|
if(not BEncodeMaybeReadDictEntry("n", nounce, read, key, buf))
|
|
return false;
|
|
|
|
if(not BEncodeMaybeReadDictInt("s", signedAt, read, key, buf))
|
|
return false;
|
|
|
|
if(not BEncodeMaybeReadDictEntry("z", sig, read, key, buf))
|
|
return false;
|
|
return read;
|
|
}
|
|
|
|
bool
|
|
EncryptedIntroSet::OtherIsNewer(const EncryptedIntroSet& other) const
|
|
{
|
|
return signedAt < other.signedAt;
|
|
}
|
|
|
|
std::ostream&
|
|
EncryptedIntroSet::print(std::ostream& out, int levels, int spaces) const
|
|
{
|
|
Printer printer(out, levels, spaces);
|
|
printer.printAttribute("d", derivedSigningKey);
|
|
printer.printAttribute("n", nounce);
|
|
printer.printAttribute("s", signedAt.count());
|
|
printer.printAttribute(
|
|
"x", "[" + std::to_string(introsetPayload.size()) + " bytes]");
|
|
printer.printAttribute("z", sig);
|
|
return out;
|
|
}
|
|
|
|
nonstd::optional< IntroSet >
|
|
EncryptedIntroSet::MaybeDecrypt(const PubKey& root) const
|
|
{
|
|
SharedSecret k(root);
|
|
IntroSet i;
|
|
std::vector< byte_t > payload = introsetPayload;
|
|
llarp_buffer_t buf(payload);
|
|
CryptoManager::instance()->xchacha20(buf, k, nounce);
|
|
if(not i.BDecode(&buf))
|
|
return {};
|
|
return i;
|
|
}
|
|
|
|
bool
|
|
EncryptedIntroSet::IsExpired(llarp_time_t now) const
|
|
{
|
|
return now >= signedAt + path::default_lifetime;
|
|
}
|
|
|
|
bool
|
|
EncryptedIntroSet::Sign(const PrivateKey& k)
|
|
{
|
|
signedAt = llarp::time_now_ms();
|
|
if(not k.toPublic(derivedSigningKey))
|
|
return false;
|
|
sig.Zero();
|
|
std::array< byte_t, MAX_INTROSET_SIZE + 128 > tmp;
|
|
llarp_buffer_t buf(tmp);
|
|
if(not BEncode(&buf))
|
|
return false;
|
|
buf.sz = buf.cur - buf.base;
|
|
buf.cur = buf.base;
|
|
if(not CryptoManager::instance()->sign(sig, k, buf))
|
|
return false;
|
|
LogDebug("signed encrypted introset: ", *this);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
EncryptedIntroSet::Verify(llarp_time_t now) const
|
|
{
|
|
if(IsExpired(now))
|
|
return false;
|
|
std::array< byte_t, MAX_INTROSET_SIZE + 128 > tmp;
|
|
llarp_buffer_t buf(tmp);
|
|
EncryptedIntroSet copy(*this);
|
|
copy.sig.Zero();
|
|
if(not copy.BEncode(&buf))
|
|
return false;
|
|
LogDebug("verify encrypted introset: ", copy, " sig = ", sig);
|
|
buf.sz = buf.cur - buf.base;
|
|
buf.cur = buf.base;
|
|
return CryptoManager::instance()->verify(derivedSigningKey, buf, sig);
|
|
}
|
|
|
|
util::StatusObject
|
|
IntroSet::ExtractStatus() const
|
|
{
|
|
util::StatusObject obj{{"published", to_json(T)}};
|
|
std::vector< util::StatusObject > introsObjs;
|
|
std::transform(I.begin(), I.end(), std::back_inserter(introsObjs),
|
|
[](const auto& intro) -> util::StatusObject {
|
|
return intro.ExtractStatus();
|
|
});
|
|
obj["intros"] = introsObjs;
|
|
if(!topic.IsZero())
|
|
obj["topic"] = topic.ToString();
|
|
return obj;
|
|
}
|
|
|
|
bool
|
|
IntroSet::DecodeKey(const llarp_buffer_t& key, llarp_buffer_t* buf)
|
|
{
|
|
bool read = false;
|
|
if(!BEncodeMaybeReadDictEntry("a", A, read, key, buf))
|
|
return false;
|
|
|
|
if(key == "i")
|
|
{
|
|
return BEncodeReadList(I, buf);
|
|
}
|
|
if(!BEncodeMaybeReadDictEntry("k", K, read, key, buf))
|
|
return false;
|
|
|
|
if(!BEncodeMaybeReadDictEntry("n", topic, read, key, buf))
|
|
return false;
|
|
|
|
if(!BEncodeMaybeReadDictInt("t", T, read, key, buf))
|
|
return false;
|
|
|
|
if(key == "w")
|
|
{
|
|
W.emplace();
|
|
return bencode_decode_dict(*W, buf);
|
|
}
|
|
|
|
if(!BEncodeMaybeReadDictInt("v", version, read, key, buf))
|
|
return false;
|
|
|
|
if(!BEncodeMaybeReadDictEntry("z", Z, read, key, buf))
|
|
return false;
|
|
|
|
return read;
|
|
}
|
|
|
|
bool
|
|
IntroSet::BEncode(llarp_buffer_t* buf) const
|
|
{
|
|
if(!bencode_start_dict(buf))
|
|
return false;
|
|
if(!BEncodeWriteDictEntry("a", A, buf))
|
|
return false;
|
|
// start introduction list
|
|
if(!bencode_write_bytestring(buf, "i", 1))
|
|
return false;
|
|
if(!BEncodeWriteList(I.begin(), I.end(), buf))
|
|
return false;
|
|
// end introduction list
|
|
|
|
// pq pubkey
|
|
if(!BEncodeWriteDictEntry("k", K, buf))
|
|
return false;
|
|
|
|
// topic tag
|
|
if(topic.ToString().size())
|
|
{
|
|
if(!BEncodeWriteDictEntry("n", topic, buf))
|
|
return false;
|
|
}
|
|
// Timestamp published
|
|
if(!BEncodeWriteDictInt("t", T.count(), buf))
|
|
return false;
|
|
|
|
// write version
|
|
if(!BEncodeWriteDictInt("v", version, buf))
|
|
return false;
|
|
if(W)
|
|
{
|
|
if(!BEncodeWriteDictEntry("w", *W, buf))
|
|
return false;
|
|
}
|
|
if(!BEncodeWriteDictEntry("z", Z, buf))
|
|
return false;
|
|
|
|
return bencode_end(buf);
|
|
}
|
|
|
|
bool
|
|
IntroSet::HasExpiredIntros(llarp_time_t now) const
|
|
{
|
|
for(const auto& i : I)
|
|
if(now >= i.expiresAt)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
IntroSet::IsExpired(llarp_time_t now) const
|
|
{
|
|
return GetNewestIntroExpiration() < now;
|
|
}
|
|
|
|
bool
|
|
IntroSet::Verify(llarp_time_t now) const
|
|
{
|
|
std::array< byte_t, MAX_INTROSET_SIZE > tmp;
|
|
llarp_buffer_t buf(tmp);
|
|
IntroSet copy;
|
|
copy = *this;
|
|
copy.Z.Zero();
|
|
if(!copy.BEncode(&buf))
|
|
{
|
|
return false;
|
|
}
|
|
// rewind and resize buffer
|
|
buf.sz = buf.cur - buf.base;
|
|
buf.cur = buf.base;
|
|
if(!A.Verify(buf, Z))
|
|
{
|
|
return false;
|
|
}
|
|
// validate PoW
|
|
if(W && !W->IsValid(now))
|
|
{
|
|
return false;
|
|
}
|
|
// valid timestamps
|
|
// add max clock skew
|
|
now += MAX_INTROSET_TIME_DELTA;
|
|
for(const auto& intro : I)
|
|
{
|
|
if(intro.expiresAt > now
|
|
&& intro.expiresAt - now > path::default_lifetime)
|
|
{
|
|
if(W
|
|
&& intro.expiresAt - W->extendedLifetime > path::default_lifetime)
|
|
{
|
|
return false;
|
|
}
|
|
if(!W.has_value())
|
|
{
|
|
LogWarn("intro has too high expire time");
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
if(IsExpired(now))
|
|
{
|
|
LogWarn("introset expired: ", *this);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
llarp_time_t
|
|
IntroSet::GetNewestIntroExpiration() const
|
|
{
|
|
llarp_time_t t = 0s;
|
|
for(const auto& intro : I)
|
|
t = std::max(intro.expiresAt, t);
|
|
return t;
|
|
}
|
|
|
|
std::ostream&
|
|
IntroSet::print(std::ostream& stream, int level, int spaces) const
|
|
{
|
|
Printer printer(stream, level, spaces);
|
|
printer.printAttribute("A", A);
|
|
printer.printAttribute("I", I);
|
|
printer.printAttribute("K", K);
|
|
|
|
std::string _topic = topic.ToString();
|
|
|
|
if(!_topic.empty())
|
|
{
|
|
printer.printAttribute("topic", _topic);
|
|
}
|
|
else
|
|
{
|
|
printer.printAttribute("topic", topic);
|
|
}
|
|
|
|
printer.printAttribute("T", T.count());
|
|
if(W)
|
|
{
|
|
printer.printAttribute("W", W.value());
|
|
}
|
|
else
|
|
{
|
|
printer.printAttribute("W", "NULL");
|
|
}
|
|
printer.printAttribute("V", version);
|
|
printer.printAttribute("Z", Z);
|
|
|
|
return stream;
|
|
}
|
|
} // namespace service
|
|
} // namespace llarp
|