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don't create EVP_CIPHER_CTX for each ChaCha20

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orignal
2025-01-15 21:13:50 -05:00
parent 8c555fe592
commit 4bb82110ab
6 changed files with 63 additions and 21 deletions
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30
libi2pd/Crypto.cpp
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2024, The PurpleI2P Project
* Copyright (c) 2013-2025, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
@@ -710,19 +710,41 @@ namespace crypto
{
return AEADChaCha20Poly1305 (m_Ctx, msg, msgLen, ad, adLen, key, nonce, buf, len, false);
}
void ChaCha20 (const uint8_t * msg, size_t msgLen, const uint8_t * key, const uint8_t * nonce, uint8_t * out)
static void ChaCha20 (EVP_CIPHER_CTX *ctx, const uint8_t * msg, size_t msgLen, const uint8_t * key, const uint8_t * nonce, uint8_t * out)
{
EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new ();
uint32_t iv[4];
iv[0] = htole32 (1); memcpy (iv + 1, nonce, 12); // counter | nonce
EVP_EncryptInit_ex(ctx, EVP_chacha20 (), NULL, key, (const uint8_t *)iv);
int outlen = 0;
EVP_EncryptUpdate(ctx, out, &outlen, msg, msgLen);
EVP_EncryptFinal_ex(ctx, NULL, &outlen);
}
void ChaCha20 (const uint8_t * msg, size_t msgLen, const uint8_t * key, const uint8_t * nonce, uint8_t * out)
{
EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new ();
ChaCha20 (ctx, msg, msgLen, key, nonce, out);
EVP_CIPHER_CTX_free (ctx);
}
ChaCha20Context::ChaCha20Context ()
{
m_Ctx = EVP_CIPHER_CTX_new ();
}
ChaCha20Context::~ChaCha20Context ()
{
if (m_Ctx)
EVP_CIPHER_CTX_free (m_Ctx);
}
void ChaCha20Context::operator ()(const uint8_t * msg, size_t msgLen, const uint8_t * key, const uint8_t * nonce, uint8_t * out)
{
ChaCha20 (m_Ctx, msg, msgLen, key, nonce, out);
}
void HKDF (const uint8_t * salt, const uint8_t * key, size_t keyLen, const std::string& info,
uint8_t * out, size_t outLen)
{