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129 lines
4.6 KiB
129 lines
4.6 KiB
/* $OpenBSD: umac.h,v 1.3 2013/07/22 12:20:02 djm Exp $ */ |
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/* ----------------------------------------------------------------------- |
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* |
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* umac.h -- C Implementation UMAC Message Authentication |
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* |
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* Version 0.93a of rfc4418.txt -- 2006 July 14 |
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* |
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* For a full description of UMAC message authentication see the UMAC |
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* world-wide-web page at http://www.cs.ucdavis.edu/~rogaway/umac |
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* Please report bugs and suggestions to the UMAC webpage. |
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* |
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* Copyright (c) 1999-2004 Ted Krovetz |
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* |
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* Permission to use, copy, modify, and distribute this software and |
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* its documentation for any purpose and with or without fee, is hereby |
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* granted provided that the above copyright notice appears in all copies |
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* and in supporting documentation, and that the name of the copyright |
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* holder not be used in advertising or publicity pertaining to |
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* distribution of the software without specific, written prior permission. |
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* |
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* Comments should be directed to Ted Krovetz (tdk@acm.org) |
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* |
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* ---------------------------------------------------------------------- */ |
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/* ////////////////////// IMPORTANT NOTES ///////////////////////////////// |
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* |
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* 1) This version does not work properly on messages larger than 16MB |
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* |
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* 2) If you set the switch to use SSE2, then all data must be 16-byte |
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* aligned |
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* |
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* 3) When calling the function umac(), it is assumed that msg is in |
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* a writable buffer of length divisible by 32 bytes. The message itself |
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* does not have to fill the entire buffer, but bytes beyond msg may be |
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* zeroed. |
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* |
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* 4) Two free AES implementations are supported by this implementation of |
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* UMAC. Paulo Barreto's version is in the public domain and can be found |
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* at http://www.esat.kuleuven.ac.be/~rijmen/rijndael/ (search for |
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* "Barreto"). The only two files needed are rijndael-alg-fst.c and |
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* rijndael-alg-fst.h. |
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* Brian Gladman's version is distributed with GNU Public lisence |
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* and can be found at http://fp.gladman.plus.com/AES/index.htm. It |
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* includes a fast IA-32 assembly version. |
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* |
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/////////////////////////////////////////////////////////////////////// */ |
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#ifndef HEADER_UMAC_H |
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#define HEADER_UMAC_H |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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struct umac_ctx *umac_new(const u_char key[]); |
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/* Dynamically allocate a umac_ctx struct, initialize variables, |
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* generate subkeys from key. |
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*/ |
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#if 0 |
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int umac_reset(struct umac_ctx *ctx); |
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/* Reset a umac_ctx to begin authenicating a new message */ |
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#endif |
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int umac_update(struct umac_ctx *ctx, const u_char *input, long len); |
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/* Incorporate len bytes pointed to by input into context ctx */ |
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int umac_final(struct umac_ctx *ctx, u_char tag[], const u_char nonce[8]); |
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/* Incorporate any pending data and the ctr value, and return tag. |
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* This function returns error code if ctr < 0. |
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*/ |
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int umac_delete(struct umac_ctx *ctx); |
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/* Deallocate the context structure */ |
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#if 0 |
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int umac(struct umac_ctx *ctx, u_char *input, |
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long len, u_char tag[], |
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u_char nonce[8]); |
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/* All-in-one implementation of the functions Reset, Update and Final */ |
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#endif |
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/* uhash.h */ |
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#if 0 |
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typedef struct uhash_ctx *uhash_ctx_t; |
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/* The uhash_ctx structure is defined by the implementation of the */ |
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/* UHASH functions. */ |
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uhash_ctx_t uhash_alloc(u_char key[16]); |
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/* Dynamically allocate a uhash_ctx struct and generate subkeys using */ |
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/* the kdf and kdf_key passed in. If kdf_key_len is 0 then RC6 is */ |
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/* used to generate key with a fixed key. If kdf_key_len > 0 but kdf */ |
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/* is NULL then the first 16 bytes pointed at by kdf_key is used as a */ |
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/* key for an RC6 based KDF. */ |
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int uhash_free(uhash_ctx_t ctx); |
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int uhash_set_params(uhash_ctx_t ctx, |
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void *params); |
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int uhash_reset(uhash_ctx_t ctx); |
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int uhash_update(uhash_ctx_t ctx, |
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u_char *input, |
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long len); |
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int uhash_final(uhash_ctx_t ctx, |
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u_char ouput[]); |
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int uhash(uhash_ctx_t ctx, |
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u_char *input, |
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long len, |
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u_char output[]); |
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#endif |
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/* matching umac-128 API, we reuse umac_ctx, since it's opaque */ |
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struct umac_ctx *umac128_new(const u_char key[]); |
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int umac128_update(struct umac_ctx *ctx, const u_char *input, long len); |
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int umac128_final(struct umac_ctx *ctx, u_char tag[], const u_char nonce[8]); |
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int umac128_delete(struct umac_ctx *ctx); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* HEADER_UMAC_H */
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