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author | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-08-28 23:50:35 -0600 |
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committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-09-03 23:52:11 -0600 |
commit | 4a0e319af86c0d38304535293f6fc32fe436ef1d (patch) | |
tree | 6fca1e89becf3ff1afdcec7b6bc725e256af5811 /src/crypto/include/zinc/chacha20.h | |
parent | uapi: reformat (diff) | |
download | wireguard-monolithic-historical-4a0e319af86c0d38304535293f6fc32fe436ef1d.tar.xz wireguard-monolithic-historical-4a0e319af86c0d38304535293f6fc32fe436ef1d.zip |
crypto: import zinc
Diffstat (limited to 'src/crypto/include/zinc/chacha20.h')
-rw-r--r-- | src/crypto/include/zinc/chacha20.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/crypto/include/zinc/chacha20.h b/src/crypto/include/zinc/chacha20.h new file mode 100644 index 0000000..d09afbc --- /dev/null +++ b/src/crypto/include/zinc/chacha20.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. 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_IV_SIZE = 16, + CHACHA20_KEY_SIZE = 32, + CHACHA20_BLOCK_SIZE = 64, + HCHACHA20_KEY_SIZE = 32, + HCHACHA20_NONCE_SIZE = 16 +}; + +struct chacha20_ctx { + u32 key[8]; + u32 counter[4]; +} __aligned(32); + +void chacha20_fpu_init(void); + +static inline void chacha20_init(struct chacha20_ctx *state, + const u8 key[CHACHA20_KEY_SIZE], + const u64 nonce) +{ + state->key[0] = get_unaligned_le32(key + 0); + state->key[1] = get_unaligned_le32(key + 4); + state->key[2] = get_unaligned_le32(key + 8); + state->key[3] = get_unaligned_le32(key + 12); + state->key[4] = get_unaligned_le32(key + 16); + state->key[5] = get_unaligned_le32(key + 20); + state->key[6] = get_unaligned_le32(key + 24); + state->key[7] = get_unaligned_le32(key + 28); + state->counter[0] = state->counter[1] = 0; + state->counter[2] = nonce & U32_MAX; + state->counter[3] = nonce >> 32; +} +void chacha20(struct chacha20_ctx *state, u8 *dst, const u8 *src, u32 len, + simd_context_t simd_context); + +/* Derived key should be 32-bit aligned */ +void hchacha20(u8 derived_key[CHACHA20_KEY_SIZE], + const u8 nonce[HCHACHA20_NONCE_SIZE], + const u8 key[HCHACHA20_KEY_SIZE], simd_context_t simd_context); + +#endif /* _ZINC_CHACHA20_H */ |