1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Common values for the Poly1305 algorithm
6 #ifndef _CRYPTO_POLY1305_H
7 #define _CRYPTO_POLY1305_H
9 #include <linux/types.h>
10 #include <linux/crypto.h>
12 #define POLY1305_BLOCK_SIZE 16
13 #define POLY1305_KEY_SIZE 32
14 #define POLY1305_DIGEST_SIZE 16
17 u32 r[5]; /* key, base 2^26 */
20 struct poly1305_state {
21 u32 h[5]; /* accumulator, base 2^26 */
24 struct poly1305_desc_ctx {
26 u8 buf[POLY1305_BLOCK_SIZE];
27 /* bytes used in partial buffer */
29 /* how many keys have been set in r[] */
31 /* whether s[] has been set */
36 struct poly1305_state h;
38 struct poly1305_key r[CONFIG_CRYPTO_LIB_POLY1305_RSIZE];
41 void poly1305_init_arch(struct poly1305_desc_ctx *desc, const u8 *key);
42 void poly1305_init_generic(struct poly1305_desc_ctx *desc, const u8 *key);
44 static inline void poly1305_init(struct poly1305_desc_ctx *desc, const u8 *key)
46 if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305))
47 poly1305_init_arch(desc, key);
49 poly1305_init_generic(desc, key);
52 void poly1305_update_arch(struct poly1305_desc_ctx *desc, const u8 *src,
54 void poly1305_update_generic(struct poly1305_desc_ctx *desc, const u8 *src,
57 static inline void poly1305_update(struct poly1305_desc_ctx *desc,
58 const u8 *src, unsigned int nbytes)
60 if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305))
61 poly1305_update_arch(desc, src, nbytes);
63 poly1305_update_generic(desc, src, nbytes);
66 void poly1305_final_arch(struct poly1305_desc_ctx *desc, u8 *digest);
67 void poly1305_final_generic(struct poly1305_desc_ctx *desc, u8 *digest);
69 static inline void poly1305_final(struct poly1305_desc_ctx *desc, u8 *digest)
71 if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305))
72 poly1305_final_arch(desc, digest);
74 poly1305_final_generic(desc, digest);