PurpleI2P
/
i2pd
mirror of https://github.com/PurpleI2P/i2pd.git
1
0
Fork 0
Code Issues Releases Activity
Browse Source

Merge branch 'openssl' of https://github.com/PurpleI2P/i2pd into openssl

pull/1564/head
user 4 years ago
parent
bfcf3cfbf1 ef5495bfb2
commit
f0adbcd5e1
7 changed files with 142 additions and 38 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Unified View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 19
      libi2pd/I2NPProtocol.h
  2. 8
      libi2pd/Identity.cpp
  3. 29
      libi2pd/Timestamp.cpp
  4. 3
      libi2pd/Timestamp.h
  5. 22
      libi2pd/Tunnel.cpp
  6. 88
      libi2pd/TunnelConfig.cpp
  7. 11
      libi2pd/TunnelConfig.h

19
libi2pd/I2NPProtocol.h
Unescape View File

@ -81,6 +81,25 @@ namespace i2p
const size_t BUILD_RESPONSE_RECORD_PADDING_SIZE = 495; const size_t BUILD_RESPONSE_RECORD_PADDING_SIZE = 495;
const size_t BUILD_RESPONSE_RECORD_RET_OFFSET = BUILD_RESPONSE_RECORD_PADDING_OFFSET + BUILD_RESPONSE_RECORD_PADDING_SIZE; const size_t BUILD_RESPONSE_RECORD_RET_OFFSET = BUILD_RESPONSE_RECORD_PADDING_OFFSET + BUILD_RESPONSE_RECORD_PADDING_SIZE;
// ECIES BuildRequestRecordClearText
const size_t ECIES_BUILD_REQUEST_RECORD_RECEIVE_TUNNEL_OFFSET = 0;
const size_t ECIES_BUILD_REQUEST_RECORD_NEXT_TUNNEL_OFFSET = ECIES_BUILD_REQUEST_RECORD_RECEIVE_TUNNEL_OFFSET + 4;
const size_t ECIES_BUILD_REQUEST_RECORD_NEXT_IDENT_OFFSET = ECIES_BUILD_REQUEST_RECORD_NEXT_TUNNEL_OFFSET + 4;
const size_t ECIES_BUILD_REQUEST_RECORD_LAYER_KEY_OFFSET = ECIES_BUILD_REQUEST_RECORD_NEXT_IDENT_OFFSET + 32;
const size_t ECIES_BUILD_REQUEST_RECORD_IV_KEY_OFFSET = ECIES_BUILD_REQUEST_RECORD_LAYER_KEY_OFFSET + 32;
const size_t ECIES_BUILD_REQUEST_RECORD_REPLY_KEY_OFFSET = ECIES_BUILD_REQUEST_RECORD_IV_KEY_OFFSET + 32;
const size_t ECIES_BUILD_REQUEST_RECORD_REPLY_IV_OFFSET = ECIES_BUILD_REQUEST_RECORD_REPLY_KEY_OFFSET + 32;
const size_t ECIES_BUILD_REQUEST_RECORD_FLAG_OFFSET = ECIES_BUILD_REQUEST_RECORD_REPLY_IV_OFFSET + 16;
const size_t ECIES_BUILD_REQUEST_RECORD_MORE_FLAGS_OFFSET = ECIES_BUILD_REQUEST_RECORD_FLAG_OFFSET + 1;
const size_t ECIES_BUILD_REQUEST_RECORD_REQUEST_TIME_OFFSET = ECIES_BUILD_REQUEST_RECORD_MORE_FLAGS_OFFSET + 3;
const size_t ECIES_BUILD_REQUEST_RECORD_REQUEST_EXPIRATION_OFFSET = ECIES_BUILD_REQUEST_RECORD_REQUEST_TIME_OFFSET + 4;
const size_t ECIES_BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET = ECIES_BUILD_REQUEST_RECORD_REQUEST_EXPIRATION_OFFSET + 4;
const size_t ECIES_BUILD_REQUEST_RECORD_PADDING_OFFSET = ECIES_BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET + 4;
const size_t ECIES_BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE = 464;
// ECIES BuildResponseRecord
const size_t ECIES_BUILD_RESPONSE_RECORD_RET_OFFSET = 511;
enum I2NPMessageType enum I2NPMessageType
{ {
eI2NPDummyMsg = 0, eI2NPDummyMsg = 0,

8
libi2pd/Identity.cpp
Unescape View File

@ -48,7 +48,13 @@ namespace data
IdentityEx::IdentityEx(const uint8_t * publicKey, const uint8_t * signingKey, SigningKeyType type, CryptoKeyType cryptoType) IdentityEx::IdentityEx(const uint8_t * publicKey, const uint8_t * signingKey, SigningKeyType type, CryptoKeyType cryptoType)
{ {
memcpy (m_StandardIdentity.publicKey, publicKey, 256); // publicKey in awlays assumed 256 regardless actual size, padding must be taken care of if (cryptoType == CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET)
{
memcpy (m_StandardIdentity.publicKey, publicKey, 32);
RAND_bytes (m_StandardIdentity.publicKey, 224);
}
else
memcpy (m_StandardIdentity.publicKey, publicKey, 256);
if (type != SIGNING_KEY_TYPE_DSA_SHA1) if (type != SIGNING_KEY_TYPE_DSA_SHA1)
{ {
size_t excessLen = 0; size_t excessLen = 0;

29
libi2pd/Timestamp.cpp
Unescape View File

@ -35,15 +35,21 @@ namespace util
std::chrono::system_clock::now().time_since_epoch()).count (); std::chrono::system_clock::now().time_since_epoch()).count ();
} }
static uint32_t GetLocalHoursSinceEpoch () static uint64_t GetLocalSecondsSinceEpoch ()
{ {
return std::chrono::duration_cast<std::chrono::hours>( return std::chrono::duration_cast<std::chrono::seconds>(
std::chrono::system_clock::now().time_since_epoch()).count (); std::chrono::system_clock::now().time_since_epoch()).count ();
} }
static uint64_t GetLocalSecondsSinceEpoch () static uint32_t GetLocalMinutesSinceEpoch ()
{ {
return std::chrono::duration_cast<std::chrono::seconds>( return std::chrono::duration_cast<std::chrono::minutes>(
std::chrono::system_clock::now().time_since_epoch()).count ();
}
static uint32_t GetLocalHoursSinceEpoch ()
{
return std::chrono::duration_cast<std::chrono::hours>(
std::chrono::system_clock::now().time_since_epoch()).count (); std::chrono::system_clock::now().time_since_epoch()).count ();
} }
@ -178,14 +184,19 @@ namespace util
return GetLocalMillisecondsSinceEpoch () + g_TimeOffset*1000; return GetLocalMillisecondsSinceEpoch () + g_TimeOffset*1000;
} }
uint32_t GetHoursSinceEpoch ()
{
return GetLocalHoursSinceEpoch () + g_TimeOffset/3600;
}
uint64_t GetSecondsSinceEpoch () uint64_t GetSecondsSinceEpoch ()
{ {
return GetLocalSecondsSinceEpoch () + g_TimeOffset; return GetLocalSecondsSinceEpoch () + g_TimeOffset;
}
uint32_t GetMinutesSinceEpoch ()
{
return GetLocalMinutesSinceEpoch () + g_TimeOffset/60;
}
uint32_t GetHoursSinceEpoch ()
{
return GetLocalHoursSinceEpoch () + g_TimeOffset/3600;
} }
void GetCurrentDate (char * date) void GetCurrentDate (char * date)

3
libi2pd/Timestamp.h
Unescape View File

@ -20,8 +20,9 @@ namespace i2p
namespace util namespace util
{ {
uint64_t GetMillisecondsSinceEpoch (); uint64_t GetMillisecondsSinceEpoch ();
uint32_t GetHoursSinceEpoch ();
uint64_t GetSecondsSinceEpoch (); uint64_t GetSecondsSinceEpoch ();
uint32_t GetMinutesSinceEpoch ();
uint32_t GetHoursSinceEpoch ();
void GetCurrentDate (char * date); // returns date as YYYYMMDD string, 9 bytes void GetCurrentDate (char * date); // returns date as YYYYMMDD string, 9 bytes
void GetDateString (uint64_t timestamp, char * date); // timestap is seconds since epoch, returns date as YYYYMMDD string, 9 bytes void GetDateString (uint64_t timestamp, char * date); // timestap is seconds since epoch, returns date as YYYYMMDD string, 9 bytes

22
libi2pd/Tunnel.cpp
Unescape View File

@ -111,7 +111,7 @@ namespace tunnel
while (hop) while (hop)
{ {
decryption.SetKey (hop->replyKey); decryption.SetKey (hop->replyKey);
// decrypt records before and including current hop // decrypt records before and current hop
TunnelHopConfig * hop1 = hop; TunnelHopConfig * hop1 = hop;
while (hop1) while (hop1)
{ {
@ -119,8 +119,22 @@ namespace tunnel
if (idx >= 0 && idx < msg[0]) if (idx >= 0 && idx < msg[0])
{ {
uint8_t * record = msg + 1 + idx*TUNNEL_BUILD_RECORD_SIZE; uint8_t * record = msg + 1 + idx*TUNNEL_BUILD_RECORD_SIZE;
decryption.SetIV (hop->replyIV); if (hop1 == hop && hop1->IsECIES ())
decryption.Decrypt(record, TUNNEL_BUILD_RECORD_SIZE, record); {
uint8_t nonce[12];
memset (nonce, 0, 12);
if (!i2p::crypto::AEADChaCha20Poly1305 (record, TUNNEL_BUILD_RECORD_SIZE - 16,
hop->h, 32, hop->ck, nonce, record, TUNNEL_BUILD_RECORD_SIZE - 16, false)) // decrypt
{
LogPrint (eLogWarning, "Tunnel: Response AEAD decryption failed");
return false;
}
}
else
{
decryption.SetIV (hop->replyIV);
decryption.Decrypt(record, TUNNEL_BUILD_RECORD_SIZE, record);
}
} }
else else
LogPrint (eLogWarning, "Tunnel: hop index ", idx, " is out of range"); LogPrint (eLogWarning, "Tunnel: hop index ", idx, " is out of range");
@ -134,7 +148,7 @@ namespace tunnel
while (hop) while (hop)
{ {
const uint8_t * record = msg + 1 + hop->recordIndex*TUNNEL_BUILD_RECORD_SIZE; const uint8_t * record = msg + 1 + hop->recordIndex*TUNNEL_BUILD_RECORD_SIZE;
uint8_t ret = record[BUILD_RESPONSE_RECORD_RET_OFFSET]; uint8_t ret = record[hop->IsECIES () ? ECIES_BUILD_RESPONSE_RECORD_RET_OFFSET : BUILD_RESPONSE_RECORD_RET_OFFSET];
LogPrint (eLogDebug, "Tunnel: Build response ret code=", (int)ret); LogPrint (eLogDebug, "Tunnel: Build response ret code=", (int)ret);
auto profile = i2p::data::netdb.FindRouterProfile (hop->ident->GetIdentHash ()); auto profile = i2p::data::netdb.FindRouterProfile (hop->ident->GetIdentHash ());
if (profile) if (profile)

88
libi2pd/TunnelConfig.cpp
Unescape View File

@ -9,6 +9,9 @@
#include <memory> #include <memory>
#include <openssl/rand.h> #include <openssl/rand.h>
#include <openssl/sha.h>
#include "Crypto.h"
#include "Log.h"
#include "Transports.h" #include "Transports.h"
#include "Timestamp.h" #include "Timestamp.h"
#include "I2PEndian.h" #include "I2PEndian.h"
@ -76,39 +79,86 @@ namespace tunnel
} }
} }
void TunnelHopConfig::CreateBuildRequestRecord (uint8_t * record, uint32_t replyMsgID, BN_CTX * ctx) const void TunnelHopConfig::CreateBuildRequestRecord (uint8_t * record, uint32_t replyMsgID, BN_CTX * ctx)
{ {
uint8_t clearText[BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE];
htobe32buf (clearText + BUILD_REQUEST_RECORD_RECEIVE_TUNNEL_OFFSET, tunnelID);
memcpy (clearText + BUILD_REQUEST_RECORD_OUR_IDENT_OFFSET, ident->GetIdentHash (), 32);
htobe32buf (clearText + BUILD_REQUEST_RECORD_NEXT_TUNNEL_OFFSET, nextTunnelID);
memcpy (clearText + BUILD_REQUEST_RECORD_NEXT_IDENT_OFFSET, nextIdent, 32);
memcpy (clearText + BUILD_REQUEST_RECORD_LAYER_KEY_OFFSET, layerKey, 32);
memcpy (clearText + BUILD_REQUEST_RECORD_IV_KEY_OFFSET, ivKey, 32);
memcpy (clearText + BUILD_REQUEST_RECORD_REPLY_KEY_OFFSET, replyKey, 32);
memcpy (clearText + BUILD_REQUEST_RECORD_REPLY_IV_OFFSET, replyIV, 16);
uint8_t flag = 0; uint8_t flag = 0;
if (isGateway) flag |= 0x80; if (isGateway) flag |= 0x80;
if (isEndpoint) flag |= 0x40; if (isEndpoint) flag |= 0x40;
clearText[BUILD_REQUEST_RECORD_FLAG_OFFSET] = flag;
htobe32buf (clearText + BUILD_REQUEST_RECORD_REQUEST_TIME_OFFSET, i2p::util::GetHoursSinceEpoch ());
htobe32buf (clearText + BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET, replyMsgID);
RAND_bytes (clearText + BUILD_REQUEST_RECORD_PADDING_OFFSET, BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE - BUILD_REQUEST_RECORD_PADDING_OFFSET);
auto encryptor = ident->CreateEncryptor (nullptr); auto encryptor = ident->CreateEncryptor (nullptr);
if (encryptor) if (IsECIES ())
{ {
if (ident->GetCryptoKeyType () == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET) uint8_t clearText[ECIES_BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE];
htobe32buf (clearText + ECIES_BUILD_REQUEST_RECORD_RECEIVE_TUNNEL_OFFSET, tunnelID);
htobe32buf (clearText + ECIES_BUILD_REQUEST_RECORD_NEXT_TUNNEL_OFFSET, nextTunnelID);
memcpy (clearText + ECIES_BUILD_REQUEST_RECORD_NEXT_IDENT_OFFSET, nextIdent, 32);
memcpy (clearText + ECIES_BUILD_REQUEST_RECORD_LAYER_KEY_OFFSET, layerKey, 32);
memcpy (clearText + ECIES_BUILD_REQUEST_RECORD_IV_KEY_OFFSET, ivKey, 32);
memcpy (clearText + ECIES_BUILD_REQUEST_RECORD_REPLY_KEY_OFFSET, replyKey, 32);
memcpy (clearText + ECIES_BUILD_REQUEST_RECORD_REPLY_IV_OFFSET, replyIV, 16);
clearText[ECIES_BUILD_REQUEST_RECORD_FLAG_OFFSET] = flag;
memset (clearText + ECIES_BUILD_REQUEST_RECORD_MORE_FLAGS_OFFSET, 0, 3); // set to 0 for compatibility
htobe32buf (clearText + ECIES_BUILD_REQUEST_RECORD_REQUEST_TIME_OFFSET, i2p::util::GetMinutesSinceEpoch ());
htobe32buf (clearText + ECIES_BUILD_REQUEST_RECORD_REQUEST_EXPIRATION_OFFSET, i2p::util::GetSecondsSinceEpoch () + 600); // 10 minutes
htobe32buf (clearText + ECIES_BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET, replyMsgID);
memset (clearText + ECIES_BUILD_REQUEST_RECORD_PADDING_OFFSET, 0, ECIES_BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE - ECIES_BUILD_REQUEST_RECORD_PADDING_OFFSET);
if (encryptor)
EncryptECIES (encryptor, clearText, record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET, ctx); EncryptECIES (encryptor, clearText, record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET, ctx);
else }
else
{
uint8_t clearText[BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE];
htobe32buf (clearText + BUILD_REQUEST_RECORD_RECEIVE_TUNNEL_OFFSET, tunnelID);
memcpy (clearText + BUILD_REQUEST_RECORD_OUR_IDENT_OFFSET, ident->GetIdentHash (), 32);
htobe32buf (clearText + BUILD_REQUEST_RECORD_NEXT_TUNNEL_OFFSET, nextTunnelID);
memcpy (clearText + BUILD_REQUEST_RECORD_NEXT_IDENT_OFFSET, nextIdent, 32);
memcpy (clearText + BUILD_REQUEST_RECORD_LAYER_KEY_OFFSET, layerKey, 32);
memcpy (clearText + BUILD_REQUEST_RECORD_IV_KEY_OFFSET, ivKey, 32);
memcpy (clearText + BUILD_REQUEST_RECORD_REPLY_KEY_OFFSET, replyKey, 32);
memcpy (clearText + BUILD_REQUEST_RECORD_REPLY_IV_OFFSET, replyIV, 16);
clearText[BUILD_REQUEST_RECORD_FLAG_OFFSET] = flag;
htobe32buf (clearText + BUILD_REQUEST_RECORD_REQUEST_TIME_OFFSET, i2p::util::GetHoursSinceEpoch ());
htobe32buf (clearText + BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET, replyMsgID);
RAND_bytes (clearText + BUILD_REQUEST_RECORD_PADDING_OFFSET, BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE - BUILD_REQUEST_RECORD_PADDING_OFFSET);
if (encryptor)
encryptor->Encrypt (clearText, record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET, ctx, false); encryptor->Encrypt (clearText, record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET, ctx, false);
} }
memcpy (record + BUILD_REQUEST_RECORD_TO_PEER_OFFSET, (const uint8_t *)ident->GetIdentHash (), 16); memcpy (record + BUILD_REQUEST_RECORD_TO_PEER_OFFSET, (const uint8_t *)ident->GetIdentHash (), 16);
} }
void TunnelHopConfig::EncryptECIES (std::shared_ptr<i2p::crypto::CryptoKeyEncryptor>& encryptor, void TunnelHopConfig::EncryptECIES (std::shared_ptr<i2p::crypto::CryptoKeyEncryptor>& encryptor,
const uint8_t * clearText, uint8_t * encrypted, BN_CTX * ctx) const const uint8_t * plainText, uint8_t * encrypted, BN_CTX * ctx)
{ {
memset (encrypted, 0, 512); // TODO: implement static const char protocolName[] = "Noise_N_25519_ChaChaPoly_SHA256"; // 31 chars
memcpy (ck, protocolName, 32); // ck = h = protocol_name || 0
SHA256 (ck, 32, h); // h = SHA256(h);
uint8_t hepk[32];
encryptor->Encrypt (nullptr, hepk, nullptr, false);
MixHash (hepk, 32);
auto ephemeralKeys = i2p::transport::transports.GetNextX25519KeysPair ();
memcpy (encrypted, ephemeralKeys->GetPublicKey (), 32); encrypted += 32;
uint8_t sharedSecret[32];
ephemeralKeys->Agree (hepk, sharedSecret); // x25519(sesk, hepk)
uint8_t keydata[64];
i2p::crypto::HKDF (ck, sharedSecret, 32, "", keydata);
memcpy (ck, keydata, 32);
uint8_t nonce[12];
memset (nonce, 0, 12);
if (!i2p::crypto::AEADChaCha20Poly1305 (plainText, ECIES_BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE, h, 32,
keydata + 32, nonce, encrypted, ECIES_BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE + 16, true)) // encrypt
{
LogPrint (eLogWarning, "Tunnel: Plaintext AEAD encryption failed");
return;
}
MixHash (encrypted, ECIES_BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE + 16); // h = SHA256(h || ciphertext)
} }
void TunnelHopConfig::MixHash (const uint8_t * buf, size_t len)
{
SHA256_CTX ctx;
SHA256_Init (&ctx);
SHA256_Update (&ctx, h, 32);
SHA256_Update (&ctx, buf, len);
SHA256_Final (h, &ctx);
}
} }
} }

11
libi2pd/TunnelConfig.h
Unescape View File

@ -30,17 +30,20 @@ namespace tunnel
TunnelHopConfig * next, * prev; TunnelHopConfig * next, * prev;
int recordIndex; // record # in tunnel build message int recordIndex; // record # in tunnel build message
uint8_t ck[32], h[32]; // for ECIES
TunnelHopConfig (std::shared_ptr<const i2p::data::IdentityEx> r); TunnelHopConfig (std::shared_ptr<const i2p::data::IdentityEx> r);
void SetNextIdent (const i2p::data::IdentHash& ident); void SetNextIdent (const i2p::data::IdentHash& ident);
void SetReplyHop (uint32_t replyTunnelID, const i2p::data::IdentHash& replyIdent); void SetReplyHop (uint32_t replyTunnelID, const i2p::data::IdentHash& replyIdent);
void SetNext (TunnelHopConfig * n); void SetNext (TunnelHopConfig * n);
void SetPrev (TunnelHopConfig * p); void SetPrev (TunnelHopConfig * p);
void CreateBuildRequestRecord (uint8_t * record, uint32_t replyMsgID, BN_CTX * ctx) const; bool IsECIES () const { return ident->GetCryptoKeyType () == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET; };
void CreateBuildRequestRecord (uint8_t * record, uint32_t replyMsgID, BN_CTX * ctx);
void EncryptECIES (std::shared_ptr<i2p::crypto::CryptoKeyEncryptor>& encryptor, void EncryptECIES (std::shared_ptr<i2p::crypto::CryptoKeyEncryptor>& encryptor,
const uint8_t * clearText, uint8_t * encrypted, BN_CTX * ctx) const; const uint8_t * clearText, uint8_t * encrypted, BN_CTX * ctx);
void MixHash (const uint8_t * buf, size_t len);
}; };
class TunnelConfig class TunnelConfig

Write Preview
Loading…
Cancel
Save