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/* $OpenBSD: umac.h,v 1.5 2022/01/01 01:55:30 jsg Exp $ */
/* -----------------------------------------------------------------------
*
* umac.h -- C Implementation UMAC Message Authentication
*
* Version 0.93a of rfc4418.txt -- 2006 July 14
*
* For a full description of UMAC message authentication see the UMAC
* world-wide-web page at http://www.cs.ucdavis.edu/~rogaway/umac
* Please report bugs and suggestions to the UMAC webpage.
*
* Copyright (c) 1999-2004 Ted Krovetz
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and with or without fee, is hereby
* granted provided that the above copyright notice appears in all copies
* and in supporting documentation, and that the name of the copyright
* holder not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior permission.
*
* Comments should be directed to Ted Krovetz (tdk@acm.org)
*
* ---------------------------------------------------------------------- */
/* ////////////////////// IMPORTANT NOTES /////////////////////////////////
*
* 1) This version does not work properly on messages larger than 16MB
*
* 2) If you set the switch to use SSE2, then all data must be 16-byte
* aligned
*
* 3) When calling the function umac(), it is assumed that msg is in
* a writable buffer of length divisible by 32 bytes. The message itself
* does not have to fill the entire buffer, but bytes beyond msg may be
* zeroed.
*
* 4) Two free AES implementations are supported by this implementation of
* UMAC. Paulo Barreto's version is in the public domain and can be found
* at http://www.esat.kuleuven.ac.be/~rijmen/rijndael/ (search for
* "Barreto"). The only two files needed are rijndael-alg-fst.c and
* rijndael-alg-fst.h.
* Brian Gladman's version is distributed with GNU Public license
* and can be found at http://fp.gladman.plus.com/AES/index.htm. It
* includes a fast IA-32 assembly version.
*
/////////////////////////////////////////////////////////////////////// */
#ifndef HEADER_UMAC_H
#define HEADER_UMAC_H
#ifdef __cplusplus
extern "C" {
#endif
struct umac_ctx *umac_new(const u_char key[]);
/* Dynamically allocate a umac_ctx struct, initialize variables,
* generate subkeys from key.
*/
#if 0
int umac_reset(struct umac_ctx *ctx);
/* Reset a umac_ctx to begin authenticating a new message */
#endif
int umac_update(struct umac_ctx *ctx, const u_char *input, long len);
/* Incorporate len bytes pointed to by input into context ctx */
int umac_final(struct umac_ctx *ctx, u_char tag[], const u_char nonce[8]);
/* Incorporate any pending data and the ctr value, and return tag.
* This function returns error code if ctr < 0.
*/
int umac_delete(struct umac_ctx *ctx);
/* Deallocate the context structure */
#if 0
int umac(struct umac_ctx *ctx, u_char *input,
long len, u_char tag[],
u_char nonce[8]);
/* All-in-one implementation of the functions Reset, Update and Final */
#endif
/* uhash.h */
#if 0
typedef struct uhash_ctx *uhash_ctx_t;
/* The uhash_ctx structure is defined by the implementation of the */
/* UHASH functions. */
uhash_ctx_t uhash_alloc(u_char key[16]);
/* Dynamically allocate a uhash_ctx struct and generate subkeys using */
/* the kdf and kdf_key passed in. If kdf_key_len is 0 then RC6 is */
/* used to generate key with a fixed key. If kdf_key_len > 0 but kdf */
/* is NULL then the first 16 bytes pointed at by kdf_key is used as a */
/* key for an RC6 based KDF. */
int uhash_free(uhash_ctx_t ctx);
int uhash_set_params(uhash_ctx_t ctx,
void *params);
int uhash_reset(uhash_ctx_t ctx);
int uhash_update(uhash_ctx_t ctx,
u_char *input,
long len);
int uhash_final(uhash_ctx_t ctx,
u_char output[]);
int uhash(uhash_ctx_t ctx,
u_char *input,
long len,
u_char output[]);
#endif
/* matching umac-128 API, we reuse umac_ctx, since it's opaque */
struct umac_ctx *umac128_new(const u_char key[]);
int umac128_update(struct umac_ctx *ctx, const u_char *input, long len);
int umac128_final(struct umac_ctx *ctx, u_char tag[], const u_char nonce[8]);
int umac128_delete(struct umac_ctx *ctx);
#ifdef __cplusplus
}
#endif
#endif /* HEADER_UMAC_H */
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