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| 2 | |
| 3 | * Common values for the Poly1305 algorithm
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| 4 |
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| 5 |
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| 6 | #ifndef _CRYPTO_INTERNAL_POLY1305_H
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| 7 | #define _CRYPTO_INTERNAL_POLY1305_H
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| 8 |
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| 9 | #include <crypto/poly1305.h>
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| 10 | #include <linux/types.h>
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| 11 |
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| 12 | |
| 13 | * Poly1305 core functions. These only accept whole blocks; the caller must
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| 14 | * handle any needed block buffering and padding. 'hibit' must be 1 for any
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| 15 | * full blocks, or 0 for the final block if it had to be padded. If 'nonce' is
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| 16 | * non-NULL, then it's added at the end to compute the Poly1305 MAC. Otherwise,
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| 17 | * only the ε-almost-∆-universal hash function (not the full MAC) is computed.
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| 18 |
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| 19 |
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| 20 | void poly1305_core_setkey(struct poly1305_core_key *key,
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| 21 | const u8 raw_key[POLY1305_BLOCK_SIZE]);
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| 22 | static inline void poly1305_core_init(struct poly1305_state *state)
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| 23 | {
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| 24 | *state = (struct poly1305_state){};
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| 25 | }
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| 26 |
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| 27 | void poly1305_core_blocks(struct poly1305_state *state,
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| 28 | const struct poly1305_core_key *key, const void *src,
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| 29 | size_t nblocks, u32 hibit);
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| 30 | void poly1305_core_emit(const struct poly1305_state *state, const u32 nonce[4],
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| 31 | void *dst);
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| 32 |
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| 33 | static inline void
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| 34 | poly1305_block_init_generic(struct poly1305_block_state *desc,
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| 35 | const u8 raw_key[POLY1305_BLOCK_SIZE])
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| 36 | {
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| 37 | poly1305_core_init(&desc->h);
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| 38 | poly1305_core_setkey(&desc->core_r, raw_key);
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| 39 | }
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| 40 |
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| 41 | static inline void poly1305_blocks_generic(struct poly1305_block_state *state,
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| 42 | const u8 *src, size_t len,
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| 43 | u32 padbit)
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| 44 | {
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| 45 | poly1305_core_blocks(&state->h, &state->core_r, src,
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| 46 | len / POLY1305_BLOCK_SIZE, padbit);
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| 47 | }
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| 48 |
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| 49 | static inline void poly1305_emit_generic(const struct poly1305_state *state,
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| 50 | u8 digest[POLY1305_DIGEST_SIZE],
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| 51 | const u32 nonce[4])
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| 52 | {
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| 53 | poly1305_core_emit(state, nonce, digest);
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| 54 | }
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| 55 |
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| 56 | #endif
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