cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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poly1305.h (2500B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Common values for the Poly1305 algorithm
      4 */
      5
      6#ifndef _CRYPTO_POLY1305_H
      7#define _CRYPTO_POLY1305_H
      8
      9#include <linux/types.h>
     10#include <linux/crypto.h>
     11
     12#define POLY1305_BLOCK_SIZE	16
     13#define POLY1305_KEY_SIZE	32
     14#define POLY1305_DIGEST_SIZE	16
     15
     16/* The poly1305_key and poly1305_state types are mostly opaque and
     17 * implementation-defined. Limbs might be in base 2^64 or base 2^26, or
     18 * different yet. The union type provided keeps these 64-bit aligned for the
     19 * case in which this is implemented using 64x64 multiplies.
     20 */
     21
     22struct poly1305_key {
     23	union {
     24		u32 r[5];
     25		u64 r64[3];
     26	};
     27};
     28
     29struct poly1305_core_key {
     30	struct poly1305_key key;
     31	struct poly1305_key precomputed_s;
     32};
     33
     34struct poly1305_state {
     35	union {
     36		u32 h[5];
     37		u64 h64[3];
     38	};
     39};
     40
     41struct poly1305_desc_ctx {
     42	/* partial buffer */
     43	u8 buf[POLY1305_BLOCK_SIZE];
     44	/* bytes used in partial buffer */
     45	unsigned int buflen;
     46	/* how many keys have been set in r[] */
     47	unsigned short rset;
     48	/* whether s[] has been set */
     49	bool sset;
     50	/* finalize key */
     51	u32 s[4];
     52	/* accumulator */
     53	struct poly1305_state h;
     54	/* key */
     55	union {
     56		struct poly1305_key opaque_r[CONFIG_CRYPTO_LIB_POLY1305_RSIZE];
     57		struct poly1305_core_key core_r;
     58	};
     59};
     60
     61void poly1305_init_arch(struct poly1305_desc_ctx *desc,
     62			const u8 key[POLY1305_KEY_SIZE]);
     63void poly1305_init_generic(struct poly1305_desc_ctx *desc,
     64			   const u8 key[POLY1305_KEY_SIZE]);
     65
     66static inline void poly1305_init(struct poly1305_desc_ctx *desc, const u8 *key)
     67{
     68	if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305))
     69		poly1305_init_arch(desc, key);
     70	else
     71		poly1305_init_generic(desc, key);
     72}
     73
     74void poly1305_update_arch(struct poly1305_desc_ctx *desc, const u8 *src,
     75			  unsigned int nbytes);
     76void poly1305_update_generic(struct poly1305_desc_ctx *desc, const u8 *src,
     77			     unsigned int nbytes);
     78
     79static inline void poly1305_update(struct poly1305_desc_ctx *desc,
     80				   const u8 *src, unsigned int nbytes)
     81{
     82	if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305))
     83		poly1305_update_arch(desc, src, nbytes);
     84	else
     85		poly1305_update_generic(desc, src, nbytes);
     86}
     87
     88void poly1305_final_arch(struct poly1305_desc_ctx *desc, u8 *digest);
     89void poly1305_final_generic(struct poly1305_desc_ctx *desc, u8 *digest);
     90
     91static inline void poly1305_final(struct poly1305_desc_ctx *desc, u8 *digest)
     92{
     93	if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305))
     94		poly1305_final_arch(desc, digest);
     95	else
     96		poly1305_final_generic(desc, digest);
     97}
     98
     99#endif