Annotation of src/usr.bin/ssh/umac.h, Revision 1.2
1.2 ! markus 1: /* $OpenBSD: umac.h,v 1.1 2007/06/07 19:37:34 pvalchev Exp $ */
1.1 pvalchev 2: /* -----------------------------------------------------------------------
3: *
4: * umac.h -- C Implementation UMAC Message Authentication
5: *
6: * Version 0.93a of rfc4418.txt -- 2006 July 14
7: *
8: * For a full description of UMAC message authentication see the UMAC
9: * world-wide-web page at http://www.cs.ucdavis.edu/~rogaway/umac
10: * Please report bugs and suggestions to the UMAC webpage.
11: *
12: * Copyright (c) 1999-2004 Ted Krovetz
13: *
14: * Permission to use, copy, modify, and distribute this software and
15: * its documentation for any purpose and with or without fee, is hereby
16: * granted provided that the above copyright notice appears in all copies
17: * and in supporting documentation, and that the name of the copyright
18: * holder not be used in advertising or publicity pertaining to
19: * distribution of the software without specific, written prior permission.
20: *
21: * Comments should be directed to Ted Krovetz (tdk@acm.org)
22: *
23: * ---------------------------------------------------------------------- */
24:
25: /* ////////////////////// IMPORTANT NOTES /////////////////////////////////
26: *
27: * 1) This version does not work properly on messages larger than 16MB
28: *
29: * 2) If you set the switch to use SSE2, then all data must be 16-byte
30: * aligned
31: *
32: * 3) When calling the function umac(), it is assumed that msg is in
33: * a writable buffer of length divisible by 32 bytes. The message itself
34: * does not have to fill the entire buffer, but bytes beyond msg may be
35: * zeroed.
36: *
37: * 4) Two free AES implementations are supported by this implementation of
38: * UMAC. Paulo Barreto's version is in the public domain and can be found
39: * at http://www.esat.kuleuven.ac.be/~rijmen/rijndael/ (search for
40: * "Barreto"). The only two files needed are rijndael-alg-fst.c and
41: * rijndael-alg-fst.h.
42: * Brian Gladman's version is distributed with GNU Public lisence
43: * and can be found at http://fp.gladman.plus.com/AES/index.htm. It
44: * includes a fast IA-32 assembly version.
45: *
46: /////////////////////////////////////////////////////////////////////// */
47: #ifndef HEADER_UMAC_H
48: #define HEADER_UMAC_H
49:
50:
51: #ifdef __cplusplus
52: extern "C" {
53: #endif
54:
55: struct umac_ctx *umac_new(u_char key[]);
56: /* Dynamically allocate a umac_ctx struct, initialize variables,
57: * generate subkeys from key.
58: */
59:
60: #if 0
61: int umac_reset(struct umac_ctx *ctx);
62: /* Reset a umac_ctx to begin authenicating a new message */
63: #endif
64:
65: int umac_update(struct umac_ctx *ctx, u_char *input, long len);
66: /* Incorporate len bytes pointed to by input into context ctx */
67:
68: int umac_final(struct umac_ctx *ctx, u_char tag[], u_char nonce[8]);
69: /* Incorporate any pending data and the ctr value, and return tag.
70: * This function returns error code if ctr < 0.
71: */
72:
73: int umac_delete(struct umac_ctx *ctx);
74: /* Deallocate the context structure */
75:
76: #if 0
77: int umac(struct umac_ctx *ctx, u_char *input,
78: long len, u_char tag[],
79: u_char nonce[8]);
80: /* All-in-one implementation of the functions Reset, Update and Final */
81: #endif
82:
83: /* uhash.h */
84:
85:
86: #if 0
87: typedef struct uhash_ctx *uhash_ctx_t;
88: /* The uhash_ctx structure is defined by the implementation of the */
89: /* UHASH functions. */
90:
91: uhash_ctx_t uhash_alloc(u_char key[16]);
92: /* Dynamically allocate a uhash_ctx struct and generate subkeys using */
93: /* the kdf and kdf_key passed in. If kdf_key_len is 0 then RC6 is */
94: /* used to generate key with a fixed key. If kdf_key_len > 0 but kdf */
95: /* is NULL then the first 16 bytes pointed at by kdf_key is used as a */
96: /* key for an RC6 based KDF. */
97:
98: int uhash_free(uhash_ctx_t ctx);
99:
100: int uhash_set_params(uhash_ctx_t ctx,
101: void *params);
102:
103: int uhash_reset(uhash_ctx_t ctx);
104:
105: int uhash_update(uhash_ctx_t ctx,
106: u_char *input,
107: long len);
108:
109: int uhash_final(uhash_ctx_t ctx,
110: u_char ouput[]);
111:
112: int uhash(uhash_ctx_t ctx,
113: u_char *input,
114: long len,
115: u_char output[]);
116:
117: #endif
1.2 ! markus 118:
! 119: /* matching umac-128 API, we reuse umac_ctx, since it's opaque */
! 120: struct umac_ctx *umac128_new(u_char key[]);
! 121: int umac128_update(struct umac_ctx *ctx, u_char *input, long len);
! 122: int umac128_final(struct umac_ctx *ctx, u_char tag[], u_char nonce[8]);
! 123: int umac128_delete(struct umac_ctx *ctx);
1.1 pvalchev 124:
125: #ifdef __cplusplus
126: }
127: #endif
128:
129: #endif /* HEADER_UMAC_H */
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