/* SPDX-License-Identifier: GPL-2.0 *//* * Common values for the Poly1305 algorithm */ #ifndef _CRYPTO_POLY1305_H#define _CRYPTO_POLY1305_H #include <linux/types.h>#include <linux/crypto.h> #define POLY1305_BLOCK_SIZE	16#define POLY1305_KEY_SIZE	32#define POLY1305_DIGEST_SIZE	16 /* The poly1305_key and poly1305_state types are mostly opaque and * implementation-defined. Limbs might be in base 2^64 or base 2^26, or * different yet. The union type provided keeps these 64-bit aligned for the * case in which this is implemented using 64x64 multiplies. */ struct poly1305_key {	union {		u32 r[5];		u64 r64[3];	};}; struct poly1305_core_key {	struct poly1305_key key;	struct poly1305_key precomputed_s;}; struct poly1305_state {	union {		u32 h[5];		u64 h64[3];	};}; struct poly1305_desc_ctx {	/* partial buffer */	u8 buf[POLY1305_BLOCK_SIZE];	/* bytes used in partial buffer */	unsigned int buflen;	/* how many keys have been set in r[] */	unsigned short rset;	/* whether s[] has been set */	bool sset;	/* finalize key */	u32 s[4];	/* accumulator */	struct poly1305_state h;	/* key */	union {		struct poly1305_key opaque_r[CONFIG_CRYPTO_LIB_POLY1305_RSIZE];		struct poly1305_core_key core_r;	};}; void poly1305_init_arch(struct poly1305_desc_ctx *desc, const u8 *key);void poly1305_init_generic(struct poly1305_desc_ctx *desc, const u8 *key); static inline void poly1305_init(struct poly1305_desc_ctx *desc, const u8 *key){	if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305))		poly1305_init_arch(desc, key);	else		poly1305_init_generic(desc, key);} void poly1305_update_arch(struct poly1305_desc_ctx *desc, const u8 *src,			  unsigned int nbytes);void poly1305_update_generic(struct poly1305_desc_ctx *desc, const u8 *src,			     unsigned int nbytes); static inline void poly1305_update(struct poly1305_desc_ctx *desc,				   const u8 *src, unsigned int nbytes){	if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305))		poly1305_update_arch(desc, src, nbytes);	else		poly1305_update_generic(desc, src, nbytes);} void poly1305_final_arch(struct poly1305_desc_ctx *desc, u8 *digest);void poly1305_final_generic(struct poly1305_desc_ctx *desc, u8 *digest); static inline void poly1305_final(struct poly1305_desc_ctx *desc, u8 *digest){	if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305))		poly1305_final_arch(desc, digest);	else		poly1305_final_generic(desc, digest);} #endif