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verify adler checksum

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orignal 2015-06-14 10:37:15 -04:00
parent e624cb31bd
commit b48682012d
2 changed files with 9 additions and 4 deletions
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11
NTCPSession.cpp
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@ -2,6 +2,7 @@
#include <stdlib.h>
#include "I2PEndian.h"
#include <cryptopp/dh.h>
#include <cryptopp/adler32.h>
#include "base64.h"
#include "Log.h"
#include "Timestamp.h"
@ -587,7 +588,13 @@ namespace transport
if (m_NextMessageOffset >= m_NextMessage->len + 4) // +checksum
{
// we have a complete I2NP message
m_Handler.PutNextMessage (m_NextMessage);
if (CryptoPP::Adler32().VerifyDigest (m_NextMessage->buf + m_NextMessageOffset - 4, m_NextMessage->buf, m_NextMessageOffset - 4))
m_Handler.PutNextMessage (m_NextMessage);
else
{
LogPrint (eLogWarning, "Incorrect adler checksum of NTCP message. Dropped");
DeleteI2NPMessage (m_NextMessage);
}
m_NextMessage = nullptr;
}
return true;
@ -629,7 +636,7 @@ namespace transport
int padding = 0;
if (rem > 0) padding = 16 - rem;
// TODO: fill padding
m_Adler.CalculateDigest (sendBuffer + len + 2 + padding, sendBuffer, len + 2+ padding);
CryptoPP::Adler32().CalculateDigest (sendBuffer + len + 2 + padding, sendBuffer, len + 2+ padding);
int l = len + padding + 6;
m_Encryption.Encrypt(sendBuffer, l, sendBuffer);

2
NTCPSession.h
View File

@ -9,7 +9,6 @@
#include <boost/asio.hpp>
#include <cryptopp/modes.h>
#include <cryptopp/aes.h>
#include <cryptopp/adler32.h>
#include "aes.h"
#include "Identity.h"
#include "RouterInfo.h"
@ -116,7 +115,6 @@ namespace transport
i2p::crypto::CBCDecryption m_Decryption;
i2p::crypto::CBCEncryption m_Encryption;
CryptoPP::Adler32 m_Adler;
struct Establisher
{