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don't send datetime for one time key message

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orignal 2021-07-16 09:44:22 -04:00
parent 0cd9f1b002
commit 5d022c25ba
1 changed files with 14 additions and 10 deletions
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16
libi2pd/ECIESX25519AEADRatchetSession.cpp
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@ -1099,13 +1099,17 @@ namespace garlic
return true; return true;
} }
static size_t CreateGarlicPayload (std::shared_ptr<const I2NPMessage> msg, uint8_t * payload) static size_t CreateGarlicPayload (std::shared_ptr<const I2NPMessage> msg, uint8_t * payload, bool datetime)
{
size_t len = 0;
if (datetime)
{ {
size_t len = 7;
// DateTime // DateTime
payload[0] = eECIESx25519BlkDateTime; payload[0] = eECIESx25519BlkDateTime;
htobe16buf (payload + 1, 4); htobe16buf (payload + 1, 4);
htobe32buf (payload + 3, i2p::util::GetSecondsSinceEpoch ()); htobe32buf (payload + 3, i2p::util::GetSecondsSinceEpoch ());
len = 7;
}
// I2NP // I2NP
payload += len; payload += len;
uint16_t cloveSize = msg->GetPayloadLength () + 10; uint16_t cloveSize = msg->GetPayloadLength () + 10;
@ -1120,10 +1124,10 @@ namespace garlic
len += cloveSize + 3; len += cloveSize + 3;
payload += cloveSize; payload += cloveSize;
// padding // padding
uint8_t paddingSize = (rand () & 0x0F) + 1; // 1 - 16 uint8_t paddingSize = rand () & 0x0F; // 0 - 15
payload[0] = eECIESx25519BlkPadding; payload[0] = eECIESx25519BlkPadding;
htobe16buf (payload + 1, paddingSize); htobe16buf (payload + 1, paddingSize);
memset (payload + 3, 0, paddingSize); if (paddingSize) memset (payload + 3, 0, paddingSize);
len += paddingSize + 3; len += paddingSize + 3;
return len; return len;
} }
@ -1136,7 +1140,7 @@ namespace garlic
size_t offset = 0; size_t offset = 0;
memcpy (buf + offset, &tag, 8); offset += 8; memcpy (buf + offset, &tag, 8); offset += 8;
auto payload = buf + offset; auto payload = buf + offset;
size_t len = CreateGarlicPayload (msg, payload); size_t len = CreateGarlicPayload (msg, payload, false);
uint8_t nonce[12]; uint8_t nonce[12];
memset (nonce, 0, 12); // n = 0 memset (nonce, 0, 12); // n = 0
if (!i2p::crypto::AEADChaCha20Poly1305 (payload, len, buf, 8, key, nonce, payload, len + 16, true)) // encrypt if (!i2p::crypto::AEADChaCha20Poly1305 (payload, len, buf, 8, key, nonce, payload, len + 16, true)) // encrypt
@ -1172,7 +1176,7 @@ namespace garlic
} }
noiseState.MixKey (sharedSecret); noiseState.MixKey (sharedSecret);
auto payload = buf + offset; auto payload = buf + offset;
size_t len = CreateGarlicPayload (msg, payload); size_t len = CreateGarlicPayload (msg, payload, true);
uint8_t nonce[12]; uint8_t nonce[12];
memset (nonce, 0, 12); memset (nonce, 0, 12);
// encrypt payload // encrypt payload