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d4af9e693f
I have worked hard to reduce diffs against the vendor branch. One notable change in that respect is that we no longer prefer DSA over RSA - the reasons for doing so went away years ago. This may cause some surprises, as ssh will warn about unknown host keys even for hosts whose keys haven't changed. MFC after: 6 weeks
124 lines
4.3 KiB
C
124 lines
4.3 KiB
C
/* $OpenBSD: umac.h,v 1.1 2007/06/07 19:37:34 pvalchev 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(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, 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[], 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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#ifdef __cplusplus
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}
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#endif
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#endif /* HEADER_UMAC_H */
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