31d7247da5
As architecture specific drivers need a software fallback, export a ChaCha20 en-/decryption function together with some helpers in a header file. Signed-off-by: Martin Willi <martin@strongswan.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
26 lines
595 B
C
26 lines
595 B
C
/*
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* Common values for the ChaCha20 algorithm
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*/
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#ifndef _CRYPTO_CHACHA20_H
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#define _CRYPTO_CHACHA20_H
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#include <linux/types.h>
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#include <linux/crypto.h>
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#define CHACHA20_IV_SIZE 16
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#define CHACHA20_KEY_SIZE 32
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#define CHACHA20_BLOCK_SIZE 64
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struct chacha20_ctx {
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u32 key[8];
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};
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void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv);
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int crypto_chacha20_setkey(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keysize);
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int crypto_chacha20_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes);
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#endif
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