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Code Issues Releases Activity

assume ElGamal data size as 222 bytes

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orignal 2016-11-24 16:02:14 -05:00
parent a8061003dd
commit d092b21da7
4 changed files with 5 additions and 5 deletions
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4
Crypto.cpp
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@ -308,12 +308,12 @@ namespace crypto
BN_free (b1); BN_free (b1);
} }
void ElGamalEncryption::Encrypt (const uint8_t * data, int len, uint8_t * encrypted, bool zeroPadding) const void ElGamalEncryption::Encrypt (const uint8_t * data, uint8_t * encrypted, bool zeroPadding) const
{ {
// create m // create m
uint8_t m[255]; uint8_t m[255];
m[0] = 0xFF; m[0] = 0xFF;
memcpy (m+33, data, len); memcpy (m+33, data, 222);
SHA256 (m+33, 222, m+1); SHA256 (m+33, 222, m+1);
// calculate b = b1*m mod p // calculate b = b1*m mod p
BIGNUM * b = BN_new (); BIGNUM * b = BN_new ();

2
Crypto.h
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@ -54,7 +54,7 @@ namespace crypto
ElGamalEncryption (const uint8_t * key); ElGamalEncryption (const uint8_t * key);
~ElGamalEncryption (); ~ElGamalEncryption ();
void Encrypt (const uint8_t * data, int len, uint8_t * encrypted, bool zeroPadding = false) const; void Encrypt (const uint8_t * data, uint8_t * encrypted, bool zeroPadding = false) const;
private: private:

2
Garlic.cpp
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@ -188,7 +188,7 @@ namespace garlic
RAND_bytes (elGamal.preIV, 32); // Pre-IV RAND_bytes (elGamal.preIV, 32); // Pre-IV
uint8_t iv[32]; // IV is first 16 bytes uint8_t iv[32]; // IV is first 16 bytes
SHA256(elGamal.preIV, 32, iv); SHA256(elGamal.preIV, 32, iv);
m_ElGamalEncryption->Encrypt ((uint8_t *)&elGamal, sizeof(elGamal), buf, true); m_ElGamalEncryption->Encrypt ((uint8_t *)&elGamal, buf, true);
m_Encryption.SetIV (iv); m_Encryption.SetIV (iv);
buf += 514; buf += 514;
len += 514; len += 514;

2
TunnelConfig.h
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@ -102,7 +102,7 @@ namespace tunnel
htobe32buf (clearText + BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET, replyMsgID); 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); RAND_bytes (clearText + BUILD_REQUEST_RECORD_PADDING_OFFSET, BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE - BUILD_REQUEST_RECORD_PADDING_OFFSET);
i2p::crypto::ElGamalEncryption elGamalEncryption (ident->GetEncryptionPublicKey ()); i2p::crypto::ElGamalEncryption elGamalEncryption (ident->GetEncryptionPublicKey ());
elGamalEncryption.Encrypt (clearText, BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE, record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET); elGamalEncryption.Encrypt (clearText, record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET);
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);
} }
}; };