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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _CRYPTO_INTERNAL_CHACHA_H #define _CRYPTO_INTERNAL_CHACHA_H #include <crypto/chacha.h> #include <crypto/internal/skcipher.h> #include <linux/crypto.h> 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 */
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