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2546f811ef
As architecture specific drivers need a software fallback, export Poly1305 init/update/final functions 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>
42 lines
977 B
C
42 lines
977 B
C
/*
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* Common values for the Poly1305 algorithm
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*/
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#ifndef _CRYPTO_POLY1305_H
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#define _CRYPTO_POLY1305_H
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#include <linux/types.h>
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#include <linux/crypto.h>
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#define POLY1305_BLOCK_SIZE 16
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#define POLY1305_KEY_SIZE 32
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#define POLY1305_DIGEST_SIZE 16
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struct poly1305_desc_ctx {
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/* key */
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u32 r[5];
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/* finalize key */
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u32 s[4];
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/* accumulator */
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u32 h[5];
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/* partial buffer */
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u8 buf[POLY1305_BLOCK_SIZE];
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/* bytes used in partial buffer */
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unsigned int buflen;
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/* r key has been set */
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bool rset;
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/* s key has been set */
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bool sset;
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};
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int crypto_poly1305_init(struct shash_desc *desc);
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int crypto_poly1305_setkey(struct crypto_shash *tfm,
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const u8 *key, unsigned int keylen);
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unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx,
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const u8 *src, unsigned int srclen);
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int crypto_poly1305_update(struct shash_desc *desc,
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const u8 *src, unsigned int srclen);
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int crypto_poly1305_final(struct shash_desc *desc, u8 *dst);
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#endif
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