2 * Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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34 #include <afsconfig.h>
36 #include "../afs/param.h"
38 #include <afs/param.h>
42 #include "../afs/sysincludes.h"
43 #include "../afs/afsincludes.h"
44 #include "../afs/stds.h"
45 #include "../rx/xdr.h"
47 #include "../des/des.h"
48 #include "../afs/lifetimes.h"
49 #include "../afs/rxkad.h"
50 #else /* defined(UKERNEL) */
52 #include <sys/types.h>
56 #include <netinet/in.h>
68 #include "lifetimes.h"
70 #endif /* defined(UKERNEL) */
82 #define A m->counter[0]
83 #define B m->counter[1]
84 #define C m->counter[2]
85 #define D m->counter[3]
89 MD4_Init(struct md4 *m)
99 #define F(x,y,z) CRAYFIX((x & y) | (~x & z))
100 #define G(x,y,z) ((x & y) | (x & z) | (y & z))
101 #define H(x,y,z) (x ^ y ^ z)
103 #define DOIT(a,b,c,d,k,s,i,OP) \
104 a = cshift(a + OP(b,c,d) + X[k] + i, s)
106 #define DO1(a,b,c,d,k,s,i) DOIT(a,b,c,d,k,s,i,F)
107 #define DO2(a,b,c,d,k,s,i) DOIT(a,b,c,d,k,s,i,G)
108 #define DO3(a,b,c,d,k,s,i) DOIT(a,b,c,d,k,s,i,H)
111 calc(struct md4 *m, afs_uint32 * data)
113 afs_uint32 AA, BB, CC, DD;
122 DO1(A, B, C, D, 0, 3, 0);
123 DO1(D, A, B, C, 1, 7, 0);
124 DO1(C, D, A, B, 2, 11, 0);
125 DO1(B, C, D, A, 3, 19, 0);
127 DO1(A, B, C, D, 4, 3, 0);
128 DO1(D, A, B, C, 5, 7, 0);
129 DO1(C, D, A, B, 6, 11, 0);
130 DO1(B, C, D, A, 7, 19, 0);
132 DO1(A, B, C, D, 8, 3, 0);
133 DO1(D, A, B, C, 9, 7, 0);
134 DO1(C, D, A, B, 10, 11, 0);
135 DO1(B, C, D, A, 11, 19, 0);
137 DO1(A, B, C, D, 12, 3, 0);
138 DO1(D, A, B, C, 13, 7, 0);
139 DO1(C, D, A, B, 14, 11, 0);
140 DO1(B, C, D, A, 15, 19, 0);
144 DO2(A, B, C, D, 0, 3, 0x5A827999);
145 DO2(D, A, B, C, 4, 5, 0x5A827999);
146 DO2(C, D, A, B, 8, 9, 0x5A827999);
147 DO2(B, C, D, A, 12, 13, 0x5A827999);
149 DO2(A, B, C, D, 1, 3, 0x5A827999);
150 DO2(D, A, B, C, 5, 5, 0x5A827999);
151 DO2(C, D, A, B, 9, 9, 0x5A827999);
152 DO2(B, C, D, A, 13, 13, 0x5A827999);
154 DO2(A, B, C, D, 2, 3, 0x5A827999);
155 DO2(D, A, B, C, 6, 5, 0x5A827999);
156 DO2(C, D, A, B, 10, 9, 0x5A827999);
157 DO2(B, C, D, A, 14, 13, 0x5A827999);
159 DO2(A, B, C, D, 3, 3, 0x5A827999);
160 DO2(D, A, B, C, 7, 5, 0x5A827999);
161 DO2(C, D, A, B, 11, 9, 0x5A827999);
162 DO2(B, C, D, A, 15, 13, 0x5A827999);
166 DO3(A, B, C, D, 0, 3, 0x6ED9EBA1);
167 DO3(D, A, B, C, 8, 9, 0x6ED9EBA1);
168 DO3(C, D, A, B, 4, 11, 0x6ED9EBA1);
169 DO3(B, C, D, A, 12, 15, 0x6ED9EBA1);
171 DO3(A, B, C, D, 2, 3, 0x6ED9EBA1);
172 DO3(D, A, B, C, 10, 9, 0x6ED9EBA1);
173 DO3(C, D, A, B, 6, 11, 0x6ED9EBA1);
174 DO3(B, C, D, A, 14, 15, 0x6ED9EBA1);
176 DO3(A, B, C, D, 1, 3, 0x6ED9EBA1);
177 DO3(D, A, B, C, 9, 9, 0x6ED9EBA1);
178 DO3(C, D, A, B, 5, 11, 0x6ED9EBA1);
179 DO3(B, C, D, A, 13, 15, 0x6ED9EBA1);
181 DO3(A, B, C, D, 3, 3, 0x6ED9EBA1);
182 DO3(D, A, B, C, 11, 9, 0x6ED9EBA1);
183 DO3(C, D, A, B, 7, 11, 0x6ED9EBA1);
184 DO3(B, C, D, A, 15, 15, 0x6ED9EBA1);
193 * From `Performance analysis of MD5' by Joseph D. Touch <touch@isi.edu>
196 #if defined(WORDS_BIGENDIAN)
197 static inline afs_uint32
198 swap_afs_uint32(afs_uint32 t)
200 afs_uint32 temp1, temp2;
202 temp1 = cshift(t, 16);
207 return temp1 | temp2;
217 MD4_Update(struct md4 *m, const void *v, size_t len)
219 const unsigned char *p = v;
220 size_t old_sz = m->sz[0];
224 if (m->sz[0] < old_sz)
226 offset = (old_sz / 8) % 64;
228 size_t l = min(len, 64 - offset);
229 memcpy(m->save + offset, p, l);
234 #if defined(WORDS_BIGENDIAN)
236 afs_uint32 current[16];
237 struct x32 *u = (struct x32 *)m->save;
238 for (i = 0; i < 8; i++) {
239 current[2 * i + 0] = swap_afs_uint32(u[i].a);
240 current[2 * i + 1] = swap_afs_uint32(u[i].b);
244 calc(m, (afs_uint32 *) m->save);
252 MD4_Final(void *res, struct md4 *m)
254 static unsigned char zeros[72];
255 unsigned offset = (m->sz[0] / 8) % 64;
256 unsigned int dstart = (120 - offset - 1) % 64 + 1;
259 memset(zeros + 1, 0, sizeof(zeros) - 1);
260 zeros[dstart + 0] = (m->sz[0] >> 0) & 0xff;
261 zeros[dstart + 1] = (m->sz[0] >> 8) & 0xff;
262 zeros[dstart + 2] = (m->sz[0] >> 16) & 0xff;
263 zeros[dstart + 3] = (m->sz[0] >> 24) & 0xff;
264 zeros[dstart + 4] = (m->sz[1] >> 0) & 0xff;
265 zeros[dstart + 5] = (m->sz[1] >> 8) & 0xff;
266 zeros[dstart + 6] = (m->sz[1] >> 16) & 0xff;
267 zeros[dstart + 7] = (m->sz[1] >> 24) & 0xff;
268 MD4_Update(m, zeros, dstart + 8);
271 unsigned char *r = (unsigned char *)res;
273 for (i = 0; i < 4; ++i) {
274 r[4 * i] = m->counter[i] & 0xFF;
275 r[4 * i + 1] = (m->counter[i] >> 8) & 0xFF;
276 r[4 * i + 2] = (m->counter[i] >> 16) & 0xFF;
277 r[4 * i + 3] = (m->counter[i] >> 24) & 0xFF;
283 afs_uint32 *r = (afs_uint32 *) res;
285 for (i = 0; i < 4; ++i)
286 r[i] = swap_afs_uint32(m->counter[i]);