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