Newer
Older
#include <netinet/in.h>
#ifdef __sun__
#include <inttypes.h>
#else
#include <stdint.h>
#endif
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <limits.h>
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
#include "modpost.h"
/*
* Stolen form Cryptographic API.
*
* MD4 Message Digest Algorithm (RFC1320).
*
* Implementation derived from Andrew Tridgell and Steve French's
* CIFS MD4 implementation, and the cryptoapi implementation
* originally based on the public domain implementation written
* by Colin Plumb in 1993.
*
* Copyright (c) Andrew Tridgell 1997-1998.
* Modified by Steve French (sfrench@us.ibm.com) 2002
* Copyright (c) Cryptoapi developers.
* Copyright (c) 2002 David S. Miller (davem@redhat.com)
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#define MD4_DIGEST_SIZE 16
#define MD4_HMAC_BLOCK_SIZE 64
#define MD4_BLOCK_WORDS 16
#define MD4_HASH_WORDS 4
struct md4_ctx {
uint32_t hash[MD4_HASH_WORDS];
uint32_t block[MD4_BLOCK_WORDS];
uint64_t byte_count;
};
static inline uint32_t lshift(uint32_t x, unsigned int s)
{
x &= 0xFFFFFFFF;
return ((x << s) & 0xFFFFFFFF) | (x >> (32 - s));
}
static inline uint32_t F(uint32_t x, uint32_t y, uint32_t z)
{
return (x & y) | ((~x) & z);
}
static inline uint32_t G(uint32_t x, uint32_t y, uint32_t z)
{
return (x & y) | (x & z) | (y & z);
}
static inline uint32_t H(uint32_t x, uint32_t y, uint32_t z)
{
return x ^ y ^ z;
}
#define ROUND1(a,b,c,d,k,s) (a = lshift(a + F(b,c,d) + k, s))
#define ROUND2(a,b,c,d,k,s) (a = lshift(a + G(b,c,d) + k + (uint32_t)0x5A827999,s))
#define ROUND3(a,b,c,d,k,s) (a = lshift(a + H(b,c,d) + k + (uint32_t)0x6ED9EBA1,s))
/* XXX: this stuff can be optimized */
static inline void le32_to_cpu_array(uint32_t *buf, unsigned int words)
{
while (words--) {
*buf = ntohl(*buf);
buf++;
}
}
static inline void cpu_to_le32_array(uint32_t *buf, unsigned int words)
{
while (words--) {
*buf = htonl(*buf);
buf++;
}
}
static void md4_transform(uint32_t *hash, uint32_t const *in)
{
uint32_t a, b, c, d;
a = hash[0];
b = hash[1];
c = hash[2];
d = hash[3];
ROUND1(a, b, c, d, in[0], 3);
ROUND1(d, a, b, c, in[1], 7);
ROUND1(c, d, a, b, in[2], 11);
ROUND1(b, c, d, a, in[3], 19);
ROUND1(a, b, c, d, in[4], 3);
ROUND1(d, a, b, c, in[5], 7);
ROUND1(c, d, a, b, in[6], 11);
ROUND1(b, c, d, a, in[7], 19);
ROUND1(a, b, c, d, in[8], 3);
ROUND1(d, a, b, c, in[9], 7);
ROUND1(c, d, a, b, in[10], 11);
ROUND1(b, c, d, a, in[11], 19);
ROUND1(a, b, c, d, in[12], 3);
ROUND1(d, a, b, c, in[13], 7);
ROUND1(c, d, a, b, in[14], 11);
ROUND1(b, c, d, a, in[15], 19);
ROUND2(a, b, c, d,in[ 0], 3);
ROUND2(d, a, b, c, in[4], 5);
ROUND2(c, d, a, b, in[8], 9);
ROUND2(b, c, d, a, in[12], 13);
ROUND2(a, b, c, d, in[1], 3);
ROUND2(d, a, b, c, in[5], 5);
ROUND2(c, d, a, b, in[9], 9);
ROUND2(b, c, d, a, in[13], 13);
ROUND2(a, b, c, d, in[2], 3);
ROUND2(d, a, b, c, in[6], 5);
ROUND2(c, d, a, b, in[10], 9);
ROUND2(b, c, d, a, in[14], 13);
ROUND2(a, b, c, d, in[3], 3);
ROUND2(d, a, b, c, in[7], 5);
ROUND2(c, d, a, b, in[11], 9);
ROUND2(b, c, d, a, in[15], 13);
ROUND3(a, b, c, d,in[ 0], 3);
ROUND3(d, a, b, c, in[8], 9);
ROUND3(c, d, a, b, in[4], 11);
ROUND3(b, c, d, a, in[12], 15);
ROUND3(a, b, c, d, in[2], 3);
ROUND3(d, a, b, c, in[10], 9);
ROUND3(c, d, a, b, in[6], 11);
ROUND3(b, c, d, a, in[14], 15);
ROUND3(a, b, c, d, in[1], 3);
ROUND3(d, a, b, c, in[9], 9);
ROUND3(c, d, a, b, in[5], 11);
ROUND3(b, c, d, a, in[13], 15);
ROUND3(a, b, c, d, in[3], 3);
ROUND3(d, a, b, c, in[11], 9);
ROUND3(c, d, a, b, in[7], 11);
ROUND3(b, c, d, a, in[15], 15);
hash[0] += a;
hash[1] += b;
hash[2] += c;
hash[3] += d;
}
static inline void md4_transform_helper(struct md4_ctx *ctx)
{
le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(uint32_t));
md4_transform(ctx->hash, ctx->block);
}
static void md4_init(struct md4_ctx *mctx)
{
mctx->hash[0] = 0x67452301;
mctx->hash[1] = 0xefcdab89;
mctx->hash[2] = 0x98badcfe;
mctx->hash[3] = 0x10325476;
mctx->byte_count = 0;
}
static void md4_update(struct md4_ctx *mctx,
const unsigned char *data, unsigned int len)
{
const uint32_t avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);
mctx->byte_count += len;
if (avail > len) {
memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
data, len);
return;
}
memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
data, avail);
md4_transform_helper(mctx);
data += avail;
len -= avail;
while (len >= sizeof(mctx->block)) {
memcpy(mctx->block, data, sizeof(mctx->block));
md4_transform_helper(mctx);
data += sizeof(mctx->block);
len -= sizeof(mctx->block);
}
memcpy(mctx->block, data, len);
}
static void md4_final_ascii(struct md4_ctx *mctx, char *out, unsigned int len)
{
const unsigned int offset = mctx->byte_count & 0x3f;
char *p = (char *)mctx->block + offset;
int padding = 56 - (offset + 1);
*p++ = 0x80;
if (padding < 0) {
memset(p, 0x00, padding + sizeof (uint64_t));
md4_transform_helper(mctx);
p = (char *)mctx->block;
padding = 56;
}
memset(p, 0, padding);
mctx->block[14] = mctx->byte_count << 3;
mctx->block[15] = mctx->byte_count >> 29;
le32_to_cpu_array(mctx->block, (sizeof(mctx->block) -
sizeof(uint64_t)) / sizeof(uint32_t));
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
md4_transform(mctx->hash, mctx->block);
cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(uint32_t));
snprintf(out, len, "%08X%08X%08X%08X",
mctx->hash[0], mctx->hash[1], mctx->hash[2], mctx->hash[3]);
}
static inline void add_char(unsigned char c, struct md4_ctx *md)
{
md4_update(md, &c, 1);
}
static int parse_string(const char *file, unsigned long len,
struct md4_ctx *md)
{
unsigned long i;
add_char(file[0], md);
for (i = 1; i < len; i++) {
add_char(file[i], md);
if (file[i] == '"' && file[i-1] != '\\')
break;
}
return i;
}
static int parse_comment(const char *file, unsigned long len)
{
unsigned long i;
for (i = 2; i < len; i++) {
if (file[i-1] == '*' && file[i] == '/')
break;
}
return i;
}
/* FIXME: Handle .s files differently (eg. # starts comments) --RR */
static int parse_file(const char *fname, struct md4_ctx *md)
file = read_text_file(fname);
len = strlen(file);
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
for (i = 0; i < len; i++) {
/* Collapse and ignore \ and CR. */
if (file[i] == '\\' && (i+1 < len) && file[i+1] == '\n') {
i++;
continue;
}
/* Ignore whitespace */
if (isspace(file[i]))
continue;
/* Handle strings as whole units */
if (file[i] == '"') {
i += parse_string(file+i, len - i, md);
continue;
}
/* Comments: ignore */
if (file[i] == '/' && file[i+1] == '*') {
i += parse_comment(file+i, len - i);
continue;
}
add_char(file[i], md);
}
Ashutosh Naik
committed
/* Check whether the file is a static library or not */
static int is_static_library(const char *objfile)
{
int len = strlen(objfile);
if (objfile[len - 2] == '.' && objfile[len - 1] == 'a')
return 1;
else
return 0;
}
/* We have dir/file.o. Open dir/.file.o.cmd, look for source_ and deps_ line
* to figure out source files. */
static int parse_source_files(const char *objfile, struct md4_ctx *md)
{
char *cmd, *file, *line, *dir;
const char *base;
unsigned long flen, pos = 0;
int dirlen, ret = 0, check_files = 0;
cmd = NOFAIL(malloc(strlen(objfile) + sizeof("..cmd")));
base = strrchr(objfile, '/');
if (base) {
base++;
dirlen = base - objfile;
sprintf(cmd, "%.*s.%s.cmd", dirlen, objfile, base);
} else {
dirlen = 0;
sprintf(cmd, ".%s.cmd", objfile);
}
dir = NOFAIL(malloc(dirlen + 1));
strncpy(dir, objfile, dirlen);
dir[dirlen] = '\0';
file = grab_file(cmd, &flen);
if (!file) {
warn("could not find %s for %s\n", cmd, objfile);
/* Sum all files in the same dir or subdirs. */
while ((line = get_next_line(&pos, file, flen)) != NULL) {
if (strncmp(line, "source_", sizeof("source_")-1) == 0) {
p = strrchr(line, ' ');
if (!p) {
warn("malformed line: %s\n", line);
goto out_file;
}
p++;
if (!parse_file(p, md)) {
warn("could not open %s: %s\n",
p, strerror(errno));
goto out_file;
}
continue;
}
if (strncmp(line, "deps_", sizeof("deps_")-1) == 0) {
check_files = 1;
continue;
}
if (!check_files)
continue;
/* Continue until line does not end with '\' */
if ( *(p + strlen(p)-1) != '\\')
break;
/* Terminate line at first space, to get rid of final ' \' */
while (*p) {
if (isspace(*p)) {
*p = '\0';
break;
}
p++;
}
/* Check if this file is in same dir as objfile */
if ((strstr(line, dir)+strlen(dir)-1) == strrchr(line, '/')) {
if (!parse_file(line, md)) {
warn("could not open %s: %s\n",
line, strerror(errno));
goto out_file;
}
}
}
/* Everyone parsed OK */
ret = 1;
out_file:
release_file(file, flen);
out:
free(dir);
free(cmd);
return ret;
}
/* Calc and record src checksum. */
void get_src_version(const char *modname, char sum[], unsigned sumlen)
{
char *buf, *pos, *firstline;
char *fname;
char filelist[PATH_MAX + 1];
/* objects for a module are listed in the first line of *.mod file. */
snprintf(filelist, sizeof(filelist), "%.*smod",
(int)strlen(modname) - 1, modname);
buf = read_text_file(filelist);
pos = buf;
firstline = get_line(&pos);
if (!firstline) {
warn("bad ending versions file for %s\n", modname);
goto free;
while ((fname = strsep(&firstline, " "))) {
Ashutosh Naik
committed
if (!(is_static_library(fname)) &&
!parse_source_files(fname, &md))
goto free;
free:
free(buf);