1 /* SPDX-License-Identifier: GPL-2.0 */
3 #ifndef _CRYPTO_INTERNAL_CHACHA_H
4 #define _CRYPTO_INTERNAL_CHACHA_H
6 #include <crypto/chacha.h>
7 #include <crypto/internal/skcipher.h>
8 #include <linux/crypto.h>
15 static inline int chacha_setkey(struct crypto_skcipher *tfm, const u8 *key,
16 unsigned int keysize, int nrounds)
18 struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm);
21 if (keysize != CHACHA_KEY_SIZE)
24 for (i = 0; i < ARRAY_SIZE(ctx->key); i++)
25 ctx->key[i] = get_unaligned_le32(key + i * sizeof(u32));
27 ctx->nrounds = nrounds;
31 static inline int chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key,
34 return chacha_setkey(tfm, key, keysize, 20);
37 static inline int chacha12_setkey(struct crypto_skcipher *tfm, const u8 *key,
40 return chacha_setkey(tfm, key, keysize, 12);
43 #endif /* _CRYPTO_CHACHA_H */