jl777
7 years ago
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/* $Id: sph_keccak.h 216 2010-06-08 09:46:57Z tp $ */ |
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/**
|
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* Keccak interface. This is the interface for Keccak with the |
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* recommended parameters for SHA-3, with output lengths 224, 256, |
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* 384 and 512 bits. |
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* |
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* ==========================(LICENSE BEGIN)============================ |
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* |
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* Copyright (c) 2007-2010 Projet RNRT SAPHIR |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining |
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* a copy of this software and associated documentation files (the |
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* "Software"), to deal in the Software without restriction, including |
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* without limitation the rights to use, copy, modify, merge, publish, |
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* distribute, sublicense, and/or sell copies of the Software, and to |
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* permit persons to whom the Software is furnished to do so, subject to |
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* the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be |
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* included in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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* |
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* ===========================(LICENSE END)============================= |
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* |
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* @file sph_keccak.h |
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* @author Thomas Pornin <thomas.pornin@cryptolog.com> |
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*/ |
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#ifndef SPH_KECCAK_H__ |
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#define SPH_KECCAK_H__ |
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#ifdef __cplusplus |
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extern "C"{ |
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#endif |
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#include <stddef.h> |
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#include "sph_types.h" |
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/**
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* Output size (in bits) for Keccak-224. |
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*/ |
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#define SPH_SIZE_keccak224 224 |
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/**
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* Output size (in bits) for Keccak-256. |
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*/ |
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#define SPH_SIZE_keccak256 256 |
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/**
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* Output size (in bits) for Keccak-384. |
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*/ |
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#define SPH_SIZE_keccak384 384 |
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/**
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* Output size (in bits) for Keccak-512. |
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*/ |
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#define SPH_SIZE_keccak512 512 |
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/**
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* This structure is a context for Keccak computations: it contains the |
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* intermediate values and some data from the last entered block. Once a |
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* Keccak computation has been performed, the context can be reused for |
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* another computation. |
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* |
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* The contents of this structure are private. A running Keccak computation |
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* can be cloned by copying the context (e.g. with a simple |
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* <code>memcpy()</code>). |
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*/ |
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typedef struct { |
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#ifndef DOXYGEN_IGNORE |
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unsigned char buf[144]; /* first field, for alignment */ |
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size_t ptr, lim; |
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union { |
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#if SPH_64 |
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sph_u64 wide[25]; |
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#endif |
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sph_u32 narrow[50]; |
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} u; |
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#endif |
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} sph_keccak_context; |
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/**
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* Type for a Keccak-224 context (identical to the common context). |
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*/ |
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typedef sph_keccak_context sph_keccak224_context; |
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|
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/**
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* Type for a Keccak-256 context (identical to the common context). |
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*/ |
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typedef sph_keccak_context sph_keccak256_context; |
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|
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/**
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* Type for a Keccak-384 context (identical to the common context). |
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*/ |
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typedef sph_keccak_context sph_keccak384_context; |
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/**
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* Type for a Keccak-512 context (identical to the common context). |
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*/ |
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typedef sph_keccak_context sph_keccak512_context; |
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/**
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* Initialize a Keccak-224 context. This process performs no memory allocation. |
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* |
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* @param cc the Keccak-224 context (pointer to a |
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* <code>sph_keccak224_context</code>) |
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*/ |
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void sph_keccak224_init(void *cc); |
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|
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/**
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* Process some data bytes. It is acceptable that <code>len</code> is zero |
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* (in which case this function does nothing). |
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* |
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* @param cc the Keccak-224 context |
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* @param data the input data |
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* @param len the input data length (in bytes) |
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*/ |
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void sph_keccak224(void *cc, const void *data, size_t len); |
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/**
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* Terminate the current Keccak-224 computation and output the result into |
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* the provided buffer. The destination buffer must be wide enough to |
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* accomodate the result (28 bytes). The context is automatically |
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* reinitialized. |
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* |
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* @param cc the Keccak-224 context |
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* @param dst the destination buffer |
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*/ |
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void sph_keccak224_close(void *cc, void *dst); |
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|
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/**
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* Add a few additional bits (0 to 7) to the current computation, then |
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* terminate it and output the result in the provided buffer, which must |
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* be wide enough to accomodate the result (28 bytes). If bit number i |
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* in <code>ub</code> has value 2^i, then the extra bits are those |
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* numbered 7 downto 8-n (this is the big-endian convention at the byte |
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* level). The context is automatically reinitialized. |
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* |
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* @param cc the Keccak-224 context |
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* @param ub the extra bits |
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* @param n the number of extra bits (0 to 7) |
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* @param dst the destination buffer |
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*/ |
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void sph_keccak224_addbits_and_close( |
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void *cc, unsigned ub, unsigned n, void *dst); |
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|
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/**
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* Initialize a Keccak-256 context. This process performs no memory allocation. |
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* |
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* @param cc the Keccak-256 context (pointer to a |
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* <code>sph_keccak256_context</code>) |
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*/ |
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void sph_keccak256_init(void *cc); |
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|
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/**
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* Process some data bytes. It is acceptable that <code>len</code> is zero |
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* (in which case this function does nothing). |
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* |
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* @param cc the Keccak-256 context |
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* @param data the input data |
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* @param len the input data length (in bytes) |
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*/ |
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void sph_keccak256(void *cc, const void *data, size_t len); |
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|
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/**
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* Terminate the current Keccak-256 computation and output the result into |
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* the provided buffer. The destination buffer must be wide enough to |
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* accomodate the result (32 bytes). The context is automatically |
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* reinitialized. |
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* |
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* @param cc the Keccak-256 context |
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* @param dst the destination buffer |
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*/ |
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void sph_keccak256_close(void *cc, void *dst); |
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|
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/**
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* Add a few additional bits (0 to 7) to the current computation, then |
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* terminate it and output the result in the provided buffer, which must |
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* be wide enough to accomodate the result (32 bytes). If bit number i |
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* in <code>ub</code> has value 2^i, then the extra bits are those |
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* numbered 7 downto 8-n (this is the big-endian convention at the byte |
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* level). The context is automatically reinitialized. |
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* |
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* @param cc the Keccak-256 context |
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* @param ub the extra bits |
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* @param n the number of extra bits (0 to 7) |
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* @param dst the destination buffer |
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*/ |
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void sph_keccak256_addbits_and_close( |
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void *cc, unsigned ub, unsigned n, void *dst); |
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|
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/**
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* Initialize a Keccak-384 context. This process performs no memory allocation. |
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* |
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* @param cc the Keccak-384 context (pointer to a |
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* <code>sph_keccak384_context</code>) |
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*/ |
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void sph_keccak384_init(void *cc); |
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|
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/**
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* Process some data bytes. It is acceptable that <code>len</code> is zero |
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* (in which case this function does nothing). |
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* |
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* @param cc the Keccak-384 context |
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* @param data the input data |
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* @param len the input data length (in bytes) |
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*/ |
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void sph_keccak384(void *cc, const void *data, size_t len); |
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|
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/**
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* Terminate the current Keccak-384 computation and output the result into |
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* the provided buffer. The destination buffer must be wide enough to |
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* accomodate the result (48 bytes). The context is automatically |
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* reinitialized. |
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* |
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* @param cc the Keccak-384 context |
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* @param dst the destination buffer |
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*/ |
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void sph_keccak384_close(void *cc, void *dst); |
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|
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/**
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* Add a few additional bits (0 to 7) to the current computation, then |
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* terminate it and output the result in the provided buffer, which must |
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* be wide enough to accomodate the result (48 bytes). If bit number i |
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* in <code>ub</code> has value 2^i, then the extra bits are those |
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* numbered 7 downto 8-n (this is the big-endian convention at the byte |
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* level). The context is automatically reinitialized. |
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* |
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* @param cc the Keccak-384 context |
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* @param ub the extra bits |
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* @param n the number of extra bits (0 to 7) |
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* @param dst the destination buffer |
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*/ |
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void sph_keccak384_addbits_and_close( |
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void *cc, unsigned ub, unsigned n, void *dst); |
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|
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/**
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* Initialize a Keccak-512 context. This process performs no memory allocation. |
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* |
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* @param cc the Keccak-512 context (pointer to a |
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* <code>sph_keccak512_context</code>) |
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*/ |
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void sph_keccak512_init(void *cc); |
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|
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/**
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* Process some data bytes. It is acceptable that <code>len</code> is zero |
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* (in which case this function does nothing). |
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* |
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* @param cc the Keccak-512 context |
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* @param data the input data |
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* @param len the input data length (in bytes) |
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*/ |
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void sph_keccak512(void *cc, const void *data, size_t len); |
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|
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/**
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* Terminate the current Keccak-512 computation and output the result into |
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* the provided buffer. The destination buffer must be wide enough to |
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* accomodate the result (64 bytes). The context is automatically |
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* reinitialized. |
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* |
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* @param cc the Keccak-512 context |
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* @param dst the destination buffer |
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*/ |
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void sph_keccak512_close(void *cc, void *dst); |
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|
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/**
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* Add a few additional bits (0 to 7) to the current computation, then |
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* terminate it and output the result in the provided buffer, which must |
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* be wide enough to accomodate the result (64 bytes). If bit number i |
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* in <code>ub</code> has value 2^i, then the extra bits are those |
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* numbered 7 downto 8-n (this is the big-endian convention at the byte |
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* level). The context is automatically reinitialized. |
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* |
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* @param cc the Keccak-512 context |
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* @param ub the extra bits |
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* @param n the number of extra bits (0 to 7) |
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* @param dst the destination buffer |
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*/ |
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void sph_keccak512_addbits_and_close( |
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void *cc, unsigned ub, unsigned n, void *dst); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif |
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