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use common context for ElGamal encrypt/decrypt

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orignal 2017-03-11 16:48:54 -05:00
parent 4bb607f180
commit c0c157ecef
7 changed files with 27 additions and 19 deletions
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13
Garlic.cpp
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@ -187,7 +187,8 @@ namespace garlic
RAND_bytes (elGamal.preIV, 32); // Pre-IV
uint8_t iv[32]; // IV is first 16 bytes
SHA256(elGamal.preIV, 32, iv);
i2p::crypto::ElGamalEncrypt (m_Destination->GetEncryptionPublicKey (), (uint8_t *)&elGamal, buf, true);
i2p::crypto::ElGamalEncrypt (m_Destination->GetEncryptionPublicKey (),
(uint8_t *)&elGamal, buf, m_Owner->GetBNContext (), true);
m_Encryption.SetIV (iv);
buf += 514;
len += 514;
@ -388,9 +389,15 @@ namespace garlic
return size;
}
GarlicDestination::GarlicDestination (): m_NumTags (32) // 32 tags by default
{
m_Ctx = BN_CTX_new ();
}
GarlicDestination::~GarlicDestination ()
{
BN_CTX_free (m_Ctx);
}
void GarlicDestination::CleanUp ()
@ -446,7 +453,7 @@ namespace garlic
{
// tag not found. Use ElGamal
ElGamalBlock elGamal;
if (length >= 514 && i2p::crypto::ElGamalDecrypt (GetEncryptionPrivateKey (), buf, (uint8_t *)&elGamal, true))
if (length >= 514 && i2p::crypto::ElGamalDecrypt (GetEncryptionPrivateKey (), buf, (uint8_t *)&elGamal, m_Ctx, true))
{
auto decryption = std::make_shared<i2p::crypto::CBCDecryption>();
decryption->SetKey (elGamal.sessionKey);