mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
2.0 KiB
70 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0 OR MIT */ |
|
/* |
|
* Copyright (C) 2015-2019 Jason A. Donenfeld <[email protected]>. All Rights Reserved. |
|
*/ |
|
|
|
#ifndef _ZINC_CHACHA20_H |
|
#define _ZINC_CHACHA20_H |
|
|
|
#include <asm/unaligned.h> |
|
#include <linux/simd.h> |
|
#include <linux/kernel.h> |
|
#include <linux/types.h> |
|
|
|
enum chacha20_lengths { |
|
CHACHA20_NONCE_SIZE = 16, |
|
CHACHA20_KEY_SIZE = 32, |
|
CHACHA20_KEY_WORDS = CHACHA20_KEY_SIZE / sizeof(u32), |
|
CHACHA20_BLOCK_SIZE = 64, |
|
CHACHA20_BLOCK_WORDS = CHACHA20_BLOCK_SIZE / sizeof(u32), |
|
HCHACHA20_NONCE_SIZE = CHACHA20_NONCE_SIZE, |
|
HCHACHA20_KEY_SIZE = CHACHA20_KEY_SIZE |
|
}; |
|
|
|
enum chacha20_constants { /* expand 32-byte k */ |
|
CHACHA20_CONSTANT_EXPA = 0x61707865U, |
|
CHACHA20_CONSTANT_ND_3 = 0x3320646eU, |
|
CHACHA20_CONSTANT_2_BY = 0x79622d32U, |
|
CHACHA20_CONSTANT_TE_K = 0x6b206574U |
|
}; |
|
|
|
struct chacha20_ctx { |
|
union { |
|
u32 state[16]; |
|
struct { |
|
u32 constant[4]; |
|
u32 key[8]; |
|
u32 counter[4]; |
|
}; |
|
}; |
|
}; |
|
|
|
static inline void chacha20_init(struct chacha20_ctx *ctx, |
|
const u8 key[CHACHA20_KEY_SIZE], |
|
const u64 nonce) |
|
{ |
|
ctx->constant[0] = CHACHA20_CONSTANT_EXPA; |
|
ctx->constant[1] = CHACHA20_CONSTANT_ND_3; |
|
ctx->constant[2] = CHACHA20_CONSTANT_2_BY; |
|
ctx->constant[3] = CHACHA20_CONSTANT_TE_K; |
|
ctx->key[0] = get_unaligned_le32(key + 0); |
|
ctx->key[1] = get_unaligned_le32(key + 4); |
|
ctx->key[2] = get_unaligned_le32(key + 8); |
|
ctx->key[3] = get_unaligned_le32(key + 12); |
|
ctx->key[4] = get_unaligned_le32(key + 16); |
|
ctx->key[5] = get_unaligned_le32(key + 20); |
|
ctx->key[6] = get_unaligned_le32(key + 24); |
|
ctx->key[7] = get_unaligned_le32(key + 28); |
|
ctx->counter[0] = 0; |
|
ctx->counter[1] = 0; |
|
ctx->counter[2] = nonce & U32_MAX; |
|
ctx->counter[3] = nonce >> 32; |
|
} |
|
void chacha20(struct chacha20_ctx *ctx, u8 *dst, const u8 *src, u32 len, |
|
simd_context_t *simd_context); |
|
|
|
void hchacha20(u32 derived_key[CHACHA20_KEY_WORDS], |
|
const u8 nonce[HCHACHA20_NONCE_SIZE], |
|
const u8 key[HCHACHA20_KEY_SIZE], simd_context_t *simd_context); |
|
|
|
#endif /* _ZINC_CHACHA20_H */
|
|
|