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9b84cb8978
Add a block-only interface for poly1305. Implement the generic code first. Also use the generic partial block helper. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/* 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_INTERNAL_POLY1305_H
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#define _CRYPTO_INTERNAL_POLY1305_H
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#include <crypto/poly1305.h>
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#include <linux/types.h>
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/*
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* Poly1305 core functions. These only accept whole blocks; the caller must
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* handle any needed block buffering and padding. 'hibit' must be 1 for any
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* full blocks, or 0 for the final block if it had to be padded. If 'nonce' is
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* non-NULL, then it's added at the end to compute the Poly1305 MAC. Otherwise,
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* only the ε-almost-∆-universal hash function (not the full MAC) is computed.
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*/
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void poly1305_core_setkey(struct poly1305_core_key *key,
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const u8 raw_key[POLY1305_BLOCK_SIZE]);
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static inline void poly1305_core_init(struct poly1305_state *state)
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{
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*state = (struct poly1305_state){};
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}
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void poly1305_core_blocks(struct poly1305_state *state,
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const struct poly1305_core_key *key, const void *src,
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unsigned int nblocks, u32 hibit);
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void poly1305_core_emit(const struct poly1305_state *state, const u32 nonce[4],
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void *dst);
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void poly1305_block_init_arch(struct poly1305_block_state *state,
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const u8 raw_key[POLY1305_BLOCK_SIZE]);
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void poly1305_block_init_generic(struct poly1305_block_state *state,
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const u8 raw_key[POLY1305_BLOCK_SIZE]);
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void poly1305_blocks_arch(struct poly1305_block_state *state, const u8 *src,
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unsigned int len, u32 padbit);
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static inline void poly1305_blocks_generic(struct poly1305_block_state *state,
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const u8 *src, unsigned int len,
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u32 padbit)
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{
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poly1305_core_blocks(&state->h, &state->core_r, src,
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len / POLY1305_BLOCK_SIZE, padbit);
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}
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void poly1305_emit_arch(const struct poly1305_state *state,
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u8 digest[POLY1305_DIGEST_SIZE], const u32 nonce[4]);
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static inline void poly1305_emit_generic(const struct poly1305_state *state,
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u8 digest[POLY1305_DIGEST_SIZE],
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const u32 nonce[4])
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{
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poly1305_core_emit(state, nonce, digest);
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}
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#endif
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