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83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
#include <time.h>
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#include <stdio.h>
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#include <cryptopp/sha.h>
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#include <cryptopp/osrng.h>
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#include <cryptopp/dh.h>
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#include <cryptopp/dsa.h>
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#include "CryptoConst.h"
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#include "Identity.h"
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namespace i2p
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{
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namespace data
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{
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Identity& Identity::operator=(const Keys& keys)
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{
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// copy public and signing keys together
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memcpy (publicKey, keys.publicKey, sizeof (publicKey) + sizeof (signingKey));
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memset (certificate, 0, sizeof (certificate));
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return *this;
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}
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IdentHash CalculateIdentHash (const Identity& identity)
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{
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IdentHash hash;
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CryptoPP::SHA256().CalculateDigest((uint8_t *)hash, (uint8_t *)&identity, sizeof (Identity));
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return hash;
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}
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Keys CreateRandomKeys ()
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{
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Keys keys;
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CryptoPP::AutoSeededRandomPool rnd;
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// encryption
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CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg);
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dh.GenerateKeyPair(rnd, keys.privateKey, keys.publicKey);
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// signing
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CryptoPP::DSA::PrivateKey privateKey;
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CryptoPP::DSA::PublicKey publicKey;
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privateKey.Initialize (rnd, i2p::crypto::dsap, i2p::crypto::dsaq, i2p::crypto::dsag);
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privateKey.MakePublicKey (publicKey);
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privateKey.GetPrivateExponent ().Encode (keys.signingPrivateKey, 20);
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publicKey.GetPublicElement ().Encode (keys.signingKey, 128);
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return keys;
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}
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RoutingKey CreateRoutingKey (const IdentHash& ident)
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{
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uint8_t buf[41]; // ident + yyyymmdd
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memcpy (buf, (const uint8_t *)ident, 32);
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time_t t = time (nullptr);
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struct tm tm;
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// WARNING!!! check if it is correct
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#ifdef _WIN32
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gmtime_s(&tm, &t);
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// òóò âîçâðàùàåòñÿ êàêîå-òî çíà÷åíèå sprintf'îì. ìîæåò ñòîèò åãî ïðîâåðÿòü?
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// http://msdn.microsoft.com/en-us/library/ce3zzk1k.aspx
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sprintf_s((char *)(buf + 32), 9, "%4i%2i%2i", tm.tm_year, tm.tm_mon, tm.tm_mday);
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#else
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gmtime_r(&t, &tm);
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// òóò âîçâðàùàåòñÿ êàêîå-òî çíà÷åíèå sprintf'îì. ìîæåò ñòîèò åãî ïðîâåðÿòü?
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sprintf((char *)(buf + 32), "%4i%2i%2i", tm.tm_year, tm.tm_mon, tm.tm_mday);
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#endif
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RoutingKey key;
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CryptoPP::SHA256().CalculateDigest(key.hash, buf, 40);
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return key;
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}
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XORMetric operator^(const RoutingKey& key1, const RoutingKey& key2)
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{
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// TODO: implementation depends on CPU
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XORMetric m;
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((uint64_t *)m.metric)[0] = ((uint64_t *)key1.hash)[0] ^ ((uint64_t *)key2.hash)[0];
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((uint64_t *)m.metric)[1] = ((uint64_t *)key1.hash)[1] ^ ((uint64_t *)key2.hash)[1];
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((uint64_t *)m.metric)[2] = ((uint64_t *)key1.hash)[2] ^ ((uint64_t *)key2.hash)[2];
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((uint64_t *)m.metric)[3] = ((uint64_t *)key1.hash)[3] ^ ((uint64_t *)key2.hash)[3];
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return m;
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}
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}
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}
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