diff options
Diffstat (limited to 'include/crypto/poly1305.h')
| -rw-r--r-- | include/crypto/poly1305.h | 93 |
1 files changed, 63 insertions, 30 deletions
diff --git a/include/crypto/poly1305.h b/include/crypto/poly1305.h index 34317ed2071e..f1f67fc749cf 100644 --- a/include/crypto/poly1305.h +++ b/include/crypto/poly1305.h @@ -13,52 +13,85 @@ #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 { - u32 r[5]; /* key, base 2^26 */ + union { + u32 r[5]; + u64 r64[3]; + }; +}; + +struct poly1305_core_key { + struct poly1305_key key; + struct poly1305_key precomputed_s; }; struct poly1305_state { - u32 h[5]; /* accumulator, base 2^26 */ + union { + u32 h[5]; + u64 h64[3]; + }; }; struct poly1305_desc_ctx { - /* key */ - struct poly1305_key r; - /* finalize key */ - u32 s[4]; - /* accumulator */ - struct poly1305_state h; /* partial buffer */ u8 buf[POLY1305_BLOCK_SIZE]; /* bytes used in partial buffer */ unsigned int buflen; - /* r key has been set */ - bool rset; - /* s key has been set */ + /* 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; + }; }; -/* - * Poly1305 core functions. These implement the ε-almost-∆-universal hash - * function underlying the Poly1305 MAC, i.e. they don't add an encrypted nonce - * ("s key") at the end. They also only support block-aligned inputs. - */ -void poly1305_core_setkey(struct poly1305_key *key, const u8 *raw_key); -static inline void poly1305_core_init(struct poly1305_state *state) +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) { - memset(state->h, 0, sizeof(state->h)); + if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305)) + poly1305_update_arch(desc, src, nbytes); + else + poly1305_update_generic(desc, src, nbytes); } -void poly1305_core_blocks(struct poly1305_state *state, - const struct poly1305_key *key, - const void *src, unsigned int nblocks); -void poly1305_core_emit(const struct poly1305_state *state, void *dst); -/* Crypto API helper functions for the Poly1305 MAC */ -int crypto_poly1305_init(struct shash_desc *desc); -unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx, - const u8 *src, unsigned int srclen); -int crypto_poly1305_update(struct shash_desc *desc, - const u8 *src, unsigned int srclen); -int crypto_poly1305_final(struct shash_desc *desc, u8 *dst); +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 |
