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select first hop from connected peers based on peer ordering key

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orignal
2026-05-25 21:08:37 -04:00
parent d4471cbb0f
commit b37e0572d8
6 changed files with 68 additions and 31 deletions
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libi2pd/NetDb.cpp
+19 -1
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@@ -16,6 +16,7 @@
#include "I2PEndian.h"
#include "Base.h"
#include "Crypto.h"
#include "Siphash.h"
#include "Log.h"
#include "Timestamp.h"
#include "I2NPProtocol.h"
@@ -26,8 +27,8 @@
#include "Garlic.h"
#include "ECIESX25519AEADRatchetSession.h"
#include "Config.h"
#include "NetDb.hpp"
#include "util.h"
#include "NetDb.hpp"
using namespace i2p::transport;
@@ -1406,5 +1407,22 @@ namespace data
if (r->GetBuffer ()) return true;
return r->LoadBuffer (m_Storage.Path (r->GetIdentHashBase64 ()));
}
int CalculatePeerOrderingGroup (i2p::data::Tag<16> key, const i2p::data::IdentHash& routerIdent)
{
uint8_t hash[16];
#if OPENSSL_SIPHASH
EVP_PKEY * sipKey = EVP_PKEY_new_raw_private_key (EVP_PKEY_SIPHASH, nullptr, key, 16);
EVP_MD_CTX * ctx = EVP_MD_CTX_create ();
EVP_DigestSignInit (ctx, nullptr, nullptr, nullptr, sipKey);
size_t l = 16;
EVP_DigestSign (ctx, hash, &l, routerIdent, 32);
EVP_MD_CTX_destroy (ctx);
EVP_PKEY_free (sipKey);
#else
i2p::crypto::Siphash<16> (hash, routerIdent, 32, key);
#endif
return hash[0] & 0x03;
}
}
}