From 46bed8d09f32360377350d71816a76abdfbf2c7c Mon Sep 17 00:00:00 2001 From: BobTheBob <32057864+BobTheBob9@users.noreply.github.com> Date: Wed, 24 Aug 2022 00:32:31 +0100 Subject: Adjust folder structure (#242) * Adjust folder structure * change launcher directory name --- NorthstarDLL/include/crypto/chacha.h | 43 ++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 NorthstarDLL/include/crypto/chacha.h (limited to 'NorthstarDLL/include/crypto/chacha.h') diff --git a/NorthstarDLL/include/crypto/chacha.h b/NorthstarDLL/include/crypto/chacha.h new file mode 100644 index 00000000..d29998ff --- /dev/null +++ b/NorthstarDLL/include/crypto/chacha.h @@ -0,0 +1,43 @@ +/* + * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#ifndef OSSL_CRYPTO_CHACHA_H +#define OSSL_CRYPTO_CHACHA_H +# pragma once + +#include + +/* + * ChaCha20_ctr32 encrypts |len| bytes from |inp| with the given key and + * nonce and writes the result to |out|, which may be equal to |inp|. + * The |key| is not 32 bytes of verbatim key material though, but the + * said material collected into 8 32-bit elements array in host byte + * order. Same approach applies to nonce: the |counter| argument is + * pointer to concatenated nonce and counter values collected into 4 + * 32-bit elements. This, passing crypto material collected into 32-bit + * elements as opposite to passing verbatim byte vectors, is chosen for + * efficiency in multi-call scenarios. + */ +void ChaCha20_ctr32(unsigned char *out, const unsigned char *inp, + size_t len, const unsigned int key[8], + const unsigned int counter[4]); +/* + * You can notice that there is no key setup procedure. Because it's + * as trivial as collecting bytes into 32-bit elements, it's reckoned + * that below macro is sufficient. + */ +#define CHACHA_U8TOU32(p) ( \ + ((unsigned int)(p)[0]) | ((unsigned int)(p)[1]<<8) | \ + ((unsigned int)(p)[2]<<16) | ((unsigned int)(p)[3]<<24) ) + +#define CHACHA_KEY_SIZE 32 +#define CHACHA_CTR_SIZE 16 +#define CHACHA_BLK_SIZE 64 + +#endif -- cgit v1.2.3