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ChaCha20 decrypt

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orignal 2019-02-28 13:31:51 -05:00
parent af65af5be9
commit 9188e3ad3f
3 changed files with 26 additions and 3 deletions
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17
libi2pd/Crypto.cpp
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@ -1228,6 +1228,23 @@ namespace crypto
#endif
}
void ChaCha20 (const uint8_t * msg, size_t msgLen, const uint8_t * key, const uint8_t * nonce, uint8_t * out)
{
#if OPENSSL_AEAD_CHACHA20_POLY1305
EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new ();
EVP_EncryptInit_ex(ctx, EVP_chacha20 (), 0, key, nonce);
int outlen = 0;
EVP_EncryptUpdate(ctx, out, &outlen, msg, msgLen);
EVP_EncryptFinal_ex(ctx, NULL, &outlen);
EVP_CIPHER_CTX_free (ctx);
#else
chacha::Chacha20State state;
chacha::Chacha20Init (state, nonce, key, 0);
if (out != msg) memcpy (out, msg, msgLen);
chacha::Chacha20Encrypt (state, out, msgLen);
#endif
}
// init and terminate
/* std::vector <std::unique_ptr<std::mutex> > m_OpenSSLMutexes;