5 * Generic hash function interface
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 #ifndef CATACOMB_GHASH_H
31 #define CATACOMB_GHASH_H
37 /*----- Header files ------------------------------------------------------*/
41 #include <mLib/bits.h>
43 /*----- Generic hash function interface -----------------------------------*/
45 typedef struct ghash {
46 const struct ghash_ops *ops; /* Pointer to hash operations */
49 typedef struct ghash_ops {
50 const struct gchash *c; /* Pointer to hash class */
51 void (*hash)(ghash */*h*/, const void */*p*/, size_t /*sz*/); /* Hash */
52 octet *(*done)(ghash */*h*/, void */*buf*/); /* Write result */
53 void (*destroy)(ghash */*h*/); /* Destroy hash block */
54 ghash *(*copy)(ghash */*h*/); /* Make a copy of the hash context */
57 #define GH_INIT(ch) (ch)->init()
58 #define GH_CLASS(h) (h)->ops->c
59 #define GH_HASH(h, p, sz) (h)->ops->hash((h), (p), (sz))
60 #define GH_DONE(h, buf) (h)->ops->done((h), (buf))
61 #define GH_DESTROY(h) (h)->ops->destroy((h))
62 #define GH_COPY(h) (h)->ops->copy((h))
64 #define GH_HASHU_(h, n, W) do { \
65 TY_U##W n_ = (n); octet b_[SZ_##W]; \
66 STORE##W(b_, n_); GH_HASH((h), b_, SZ_##W); \
68 #define GH_HASHU8(h, n) GH_HASHU_((h), (n), 8)
69 #define GH_HASHU16(h, n) GH_HASHU_((h), (n), 16)
70 #define GH_HASHU16_B(h, n) GH_HASHU_((h), (n), 16_B)
71 #define GH_HASHU16_L(h, n) GH_HASHU_((h), (n), 16_L)
72 #define GH_HASHU24(h, n) GH_HASHU_((h), (n), 24)
73 #define GH_HASHU24_B(h, n) GH_HASHU_((h), (n), 24_B)
74 #define GH_HASHU24_L(h, n) GH_HASHU_((h), (n), 24_L)
75 #define GH_HASHU32(h, n) GH_HASHU_((h), (n), 32)
76 #define GH_HASHU32_B(h, n) GH_HASHU_((h), (n), 32_B)
77 #define GH_HASHU32_L(h, n) GH_HASHU_((h), (n), 32_L)
79 # define GH_HASHU64(h, n) GH_HASHU_((h), (n), 64)
80 # define GH_HASHU64_B(h, n) GH_HASHU_((h), (n), 64_B)
81 # define GH_HASHU64_L(h, n) GH_HASHU_((h), (n), 64_L)
84 #define GH_HASHBUF_(h, p, sz, W) do { \
85 size_t sz_ = (sz); assert(sz_ <= MASK##W); \
86 GH_HASHU_(h, sz_, W); GH_HASH(h, (p), sz_); \
88 #define GH_HASHBUF8(h, p, sz) GH_HASHBUF_((h), (p), (sz), 8)
89 #define GH_HASHBUF16(h, p, sz) GH_HASHBUF_((h), (p), (sz), 16)
90 #define GH_HASHBUF16_L(h, p, sz) GH_HASHBUF_((h), (p), (sz), 16_L)
91 #define GH_HASHBUF16_B(h, p, sz) GH_HASHBUF_((h), (p), (sz), 16_B)
92 #define GH_HASHBUF24(h, p, sz) GH_HASHBUF_((h), (p), (sz), 24)
93 #define GH_HASHBUF24_L(h, p, sz) GH_HASHBUF_((h), (p), (sz), 24_L)
94 #define GH_HASHBUF24_B(h, p, sz) GH_HASHBUF_((h), (p), (sz), 24_B)
95 #define GH_HASHBUF32(h, p, sz) GH_HASHBUF_((h), (p), (sz), 32)
96 #define GH_HASHBUF32_L(h, p, sz) GH_HASHBUF_((h), (p), (sz), 32_L)
97 #define GH_HASHBUF32_B(h, p, sz) GH_HASHBUF_((h), (p), (sz), 32_B)
99 # define GH_HASHBUF64(h, p, sz) GH_HASHBUF_((h), (p), (sz), 64)
100 # define GH_HASHBUF64_L(h, p, sz) GH_HASHBUF_((h), (p), (sz), 64_L)
101 # define GH_HASHBUF64_B(h, p, sz) GH_HASHBUF_((h), (p), (sz), 64_B)
104 #define GH_HASHSTR_(h, p, W) do { \
105 const char *p_ = (p); GH_HASHBUF_((h), p_, strlen(p_), W); \
107 #define GH_HASHSTR8(h, p) GH_HASHSTR_((h), (p), 8)
108 #define GH_HASHSTR16(h, p) GH_HASHSTR_((h), (p), 16)
109 #define GH_HASHSTR16_L(h, p) GH_HASHSTR_((h), (p), 16_L)
110 #define GH_HASHSTR16_B(h, p) GH_HASHSTR_((h), (p), 16_B)
111 #define GH_HASHSTR24(h, p) GH_HASHSTR_((h), (p), 24)
112 #define GH_HASHSTR24_L(h, p) GH_HASHSTR_((h), (p), 24_L)
113 #define GH_HASHSTR24_B(h, p) GH_HASHSTR_((h), (p), 24_B)
114 #define GH_HASHSTR32(h, p) GH_HASHSTR_((h), (p), 32)
115 #define GH_HASHSTR32_L(h, p) GH_HASHSTR_((h), (p), 32_L)
116 #define GH_HASHSTR32_B(h, p) GH_HASHSTR_((h), (p), 32_B)
118 # define GH_HASHSTR64(h, p) GH_HASHSTR_((h), (p), 64)
119 # define GH_HASHSTR64_L(h, p) GH_HASHSTR_((h), (p), 64_L)
120 # define GH_HASHSTR64_B(h, p) GH_HASHSTR_((h), (p), 64_B)
123 #define GH_HASHSTRZ(h, p) do { \
124 const char *p_ = (p); GH_HASH((h), p_, strlen(p_) + 1); \
126 #define GH_HASHSTR(h, p) do { \
127 const char *p_ = (p); GH_HASH((h), p_, strlen(p_)); \
130 typedef struct gchash {
131 const char *name; /* Name of the hash function */
132 size_t hashsz; /* Size of output hash */
133 ghash *(*init)(void); /* Create a new hash instance */
134 size_t bufsz; /* Buffer size, or zero */
137 /*----- Tables ------------------------------------------------------------*/
139 extern const gchash *const ghashtab[];
141 /* --- @ghash_byname@ --- *
143 * Arguments: @const char *p@ = pointer to name string
145 * Returns: The named cipher class, or null.
148 extern const gchash *ghash_byname(const char */*p*/);
150 /*----- That's all, folks -------------------------------------------------*/