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43 lines
969 B
43 lines
969 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _CRYPTO_INTERNAL_CHACHA_H |
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#define _CRYPTO_INTERNAL_CHACHA_H |
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#include <crypto/chacha.h> |
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#include <crypto/internal/skcipher.h> |
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#include <linux/crypto.h> |
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struct chacha_ctx { |
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u32 key[8]; |
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int nrounds; |
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}; |
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static inline int chacha_setkey(struct crypto_skcipher *tfm, const u8 *key, |
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unsigned int keysize, int nrounds) |
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{ |
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struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm); |
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int i; |
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if (keysize != CHACHA_KEY_SIZE) |
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return -EINVAL; |
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for (i = 0; i < ARRAY_SIZE(ctx->key); i++) |
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ctx->key[i] = get_unaligned_le32(key + i * sizeof(u32)); |
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ctx->nrounds = nrounds; |
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return 0; |
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} |
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static inline int chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key, |
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unsigned int keysize) |
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{ |
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return chacha_setkey(tfm, key, keysize, 20); |
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} |
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static inline int chacha12_setkey(struct crypto_skcipher *tfm, const u8 *key, |
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unsigned int keysize) |
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{ |
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return chacha_setkey(tfm, key, keysize, 12); |
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} |
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#endif /* _CRYPTO_CHACHA_H */
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