From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- include/crypto/internal/chacha.h | 43 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 include/crypto/internal/chacha.h (limited to 'include/crypto/internal/chacha.h') diff --git a/include/crypto/internal/chacha.h b/include/crypto/internal/chacha.h new file mode 100644 index 000000000..b085dc1ac --- /dev/null +++ b/include/crypto/internal/chacha.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _CRYPTO_INTERNAL_CHACHA_H +#define _CRYPTO_INTERNAL_CHACHA_H + +#include +#include +#include + +struct chacha_ctx { + u32 key[8]; + int nrounds; +}; + +static inline int chacha_setkey(struct crypto_skcipher *tfm, const u8 *key, + unsigned int keysize, int nrounds) +{ + struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm); + int i; + + if (keysize != CHACHA_KEY_SIZE) + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(ctx->key); i++) + ctx->key[i] = get_unaligned_le32(key + i * sizeof(u32)); + + ctx->nrounds = nrounds; + return 0; +} + +static inline int chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key, + unsigned int keysize) +{ + return chacha_setkey(tfm, key, keysize, 20); +} + +static inline int chacha12_setkey(struct crypto_skcipher *tfm, const u8 *key, + unsigned int keysize) +{ + return chacha_setkey(tfm, key, keysize, 12); +} + +#endif /* _CRYPTO_CHACHA_H */ -- cgit v1.2.3