Current File : //usr/local/include/proftpd/mod_sftp/umac.h
/* -----------------------------------------------------------------------
*
* 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_alloc(void);
/* Dynamically allocate a umac_ctx struct. */
struct umac_ctx *umac_new(const unsigned char key[]);
/* Dynamically allocate a umac_ctx struct, initialize variables,
* generate subkeys from key.
*/
void umac_init(struct umac_ctx *ctx, const unsigned char key[]);
/* Initialize a previously allocated umac_ctx struct. */
int umac_reset(struct umac_ctx *ctx);
/* Reset a umac_ctx to begin authenticating a new message */
int umac_update(struct umac_ctx *ctx, const unsigned char *input, long len);
/* Incorporate len bytes pointed to by input into context ctx */
int umac_final(struct umac_ctx *ctx, unsigned char tag[], const unsigned 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 */
/* ProFTPD Note: We reuse umac_ctx for the umac-128 implementation, as the
* structure is opaque. We simply recompile the umac.c file with different
* preprocessor macros to get the umac-128 implementation.
*/
struct umac_ctx *umac128_alloc(void);
struct umac_ctx *umac128_new(const unsigned char key[]);
void umac128_init(struct umac_ctx *ctx, const unsigned char key[]);
int umac128_reset(struct umac_ctx *ctx);
int umac128_update(struct umac_ctx *ctx, const unsigned char *input, long len);
int umac128_final(struct umac_ctx *ctx, unsigned char tag[], const unsigned char nonce[8]);
int umac128_delete(struct umac_ctx *ctx);
#ifdef __cplusplus
}
#endif
#endif /* HEADER_UMAC_H */
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