1 #include <netinet/in.h>
14 * Stolen form Cryptographic API.
16 * MD4 Message Digest Algorithm (RFC1320).
18 * Implementation derived from Andrew Tridgell and Steve French's
19 * CIFS MD4 implementation, and the cryptoapi implementation
20 * originally based on the public domain implementation written
21 * by Colin Plumb in 1993.
23 * Copyright (c) Andrew Tridgell 1997-1998.
25 * Copyright (c) Cryptoapi developers.
29 * This program is free software; you can redistribute it and/or modify
30 * it under the terms of the GNU General Public License as published by
31 * the Free Software Foundation; either version 2 of the License, or
32 * (at your option) any later version.
35 #define MD4_DIGEST_SIZE 16
36 #define MD4_HMAC_BLOCK_SIZE 64
37 #define MD4_BLOCK_WORDS 16
38 #define MD4_HASH_WORDS 4
41 uint32_t hash[MD4_HASH_WORDS];
42 uint32_t block[MD4_BLOCK_WORDS];
46 static inline uint32_t lshift(uint32_t x, unsigned int s)
49 return ((x << s) & 0xFFFFFFFF) | (x >> (32 - s));
52 static inline uint32_t F(uint32_t x, uint32_t y, uint32_t z)
54 return (x & y) | ((~x) & z);
57 static inline uint32_t G(uint32_t x, uint32_t y, uint32_t z)
59 return (x & y) | (x & z) | (y & z);
62 static inline uint32_t H(uint32_t x, uint32_t y, uint32_t z)
67 #define ROUND1(a,b,c,d,k,s) (a = lshift(a + F(b,c,d) + k, s))
68 #define ROUND2(a,b,c,d,k,s) (a = lshift(a + G(b,c,d) + k + (uint32_t)0x5A827999,s))
69 #define ROUND3(a,b,c,d,k,s) (a = lshift(a + H(b,c,d) + k + (uint32_t)0x6ED9EBA1,s))
71 /* XXX: this stuff can be optimized */
72 static inline void le32_to_cpu_array(uint32_t *buf, unsigned int words)
80 static inline void cpu_to_le32_array(uint32_t *buf, unsigned int words)
88 static void md4_transform(uint32_t *hash, uint32_t const *in)
97 ROUND1(a, b, c, d, in[0], 3);
98 ROUND1(d, a, b, c, in[1], 7);
99 ROUND1(c, d, a, b, in[2], 11);
100 ROUND1(b, c, d, a, in[3], 19);
101 ROUND1(a, b, c, d, in[4], 3);
102 ROUND1(d, a, b, c, in[5], 7);
103 ROUND1(c, d, a, b, in[6], 11);
104 ROUND1(b, c, d, a, in[7], 19);
105 ROUND1(a, b, c, d, in[8], 3);
106 ROUND1(d, a, b, c, in[9], 7);
107 ROUND1(c, d, a, b, in[10], 11);
108 ROUND1(b, c, d, a, in[11], 19);
109 ROUND1(a, b, c, d, in[12], 3);
110 ROUND1(d, a, b, c, in[13], 7);
111 ROUND1(c, d, a, b, in[14], 11);
112 ROUND1(b, c, d, a, in[15], 19);
114 ROUND2(a, b, c, d,in[ 0], 3);
115 ROUND2(d, a, b, c, in[4], 5);
116 ROUND2(c, d, a, b, in[8], 9);
117 ROUND2(b, c, d, a, in[12], 13);
118 ROUND2(a, b, c, d, in[1], 3);
119 ROUND2(d, a, b, c, in[5], 5);
120 ROUND2(c, d, a, b, in[9], 9);
121 ROUND2(b, c, d, a, in[13], 13);
122 ROUND2(a, b, c, d, in[2], 3);
123 ROUND2(d, a, b, c, in[6], 5);
124 ROUND2(c, d, a, b, in[10], 9);
125 ROUND2(b, c, d, a, in[14], 13);
126 ROUND2(a, b, c, d, in[3], 3);
127 ROUND2(d, a, b, c, in[7], 5);
128 ROUND2(c, d, a, b, in[11], 9);
129 ROUND2(b, c, d, a, in[15], 13);
131 ROUND3(a, b, c, d,in[ 0], 3);
132 ROUND3(d, a, b, c, in[8], 9);
133 ROUND3(c, d, a, b, in[4], 11);
134 ROUND3(b, c, d, a, in[12], 15);
135 ROUND3(a, b, c, d, in[2], 3);
136 ROUND3(d, a, b, c, in[10], 9);
137 ROUND3(c, d, a, b, in[6], 11);
138 ROUND3(b, c, d, a, in[14], 15);
139 ROUND3(a, b, c, d, in[1], 3);
140 ROUND3(d, a, b, c, in[9], 9);
141 ROUND3(c, d, a, b, in[5], 11);
142 ROUND3(b, c, d, a, in[13], 15);
143 ROUND3(a, b, c, d, in[3], 3);
144 ROUND3(d, a, b, c, in[11], 9);
145 ROUND3(c, d, a, b, in[7], 11);
146 ROUND3(b, c, d, a, in[15], 15);
154 static inline void md4_transform_helper(struct md4_ctx *ctx)
156 le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(uint32_t));
157 md4_transform(ctx->hash, ctx->block);
160 static void md4_init(struct md4_ctx *mctx)
162 mctx->hash[0] = 0x67452301;
163 mctx->hash[1] = 0xefcdab89;
164 mctx->hash[2] = 0x98badcfe;
165 mctx->hash[3] = 0x10325476;
166 mctx->byte_count = 0;
169 static void md4_update(struct md4_ctx *mctx,
170 const unsigned char *data, unsigned int len)
172 const uint32_t avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);
174 mctx->byte_count += len;
177 memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
182 memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
185 md4_transform_helper(mctx);
189 while (len >= sizeof(mctx->block)) {
190 memcpy(mctx->block, data, sizeof(mctx->block));
191 md4_transform_helper(mctx);
192 data += sizeof(mctx->block);
193 len -= sizeof(mctx->block);
196 memcpy(mctx->block, data, len);
199 static void md4_final_ascii(struct md4_ctx *mctx, char *out, unsigned int len)
201 const unsigned int offset = mctx->byte_count & 0x3f;
202 char *p = (char *)mctx->block + offset;
203 int padding = 56 - (offset + 1);
207 memset(p, 0x00, padding + sizeof (uint64_t));
208 md4_transform_helper(mctx);
209 p = (char *)mctx->block;
213 memset(p, 0, padding);
214 mctx->block[14] = mctx->byte_count << 3;
215 mctx->block[15] = mctx->byte_count >> 29;
216 le32_to_cpu_array(mctx->block, (sizeof(mctx->block) -
217 sizeof(uint64_t)) / sizeof(uint32_t));
218 md4_transform(mctx->hash, mctx->block);
219 cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(uint32_t));
221 snprintf(out, len, "%08X%08X%08X%08X",
222 mctx->hash[0], mctx->hash[1], mctx->hash[2], mctx->hash[3]);
225 static inline void add_char(unsigned char c, struct md4_ctx *md)
227 md4_update(md, &c, 1);
230 static int parse_string(const char *file, unsigned long len,
235 add_char(file[0], md);
236 for (i = 1; i < len; i++) {
237 add_char(file[i], md);
238 if (file[i] == '"' && file[i-1] != '\\')
244 static int parse_comment(const char *file, unsigned long len)
248 for (i = 2; i < len; i++) {
249 if (file[i-1] == '*' && file[i] == '/')
255 /* FIXME: Handle .s files differently (eg. # starts comments) --RR */
256 static int parse_file(const char *fname, struct md4_ctx *md)
259 unsigned long i, len;
261 file = read_text_file(fname);
264 for (i = 0; i < len; i++) {
265 /* Collapse and ignore \ and CR. */
266 if (file[i] == '\\' && (i+1 < len) && file[i+1] == '\n') {
271 /* Ignore whitespace */
272 if (isspace(file[i]))
275 /* Handle strings as whole units */
276 if (file[i] == '"') {
277 i += parse_string(file+i, len - i, md);
281 /* Comments: ignore */
282 if (file[i] == '/' && file[i+1] == '*') {
283 i += parse_comment(file+i, len - i);
287 add_char(file[i], md);
292 /* Check whether the file is a static library or not */
293 static int is_static_library(const char *objfile)
295 int len = strlen(objfile);
296 if (objfile[len - 2] == '.' && objfile[len - 1] == 'a')
302 /* We have dir/file.o. Open dir/.file.o.cmd, look for source_ and deps_ line
303 * to figure out source files. */
304 static int parse_source_files(const char *objfile, struct md4_ctx *md)
306 char *cmd, *file, *line, *dir, *pos;
308 int dirlen, ret = 0, check_files = 0;
310 cmd = NOFAIL(malloc(strlen(objfile) + sizeof("..cmd")));
312 base = strrchr(objfile, '/');
315 dirlen = base - objfile;
316 sprintf(cmd, "%.*s.%s.cmd", dirlen, objfile, base);
319 sprintf(cmd, ".%s.cmd", objfile);
321 dir = NOFAIL(malloc(dirlen + 1));
322 strncpy(dir, objfile, dirlen);
325 file = read_text_file(cmd);
329 /* Sum all files in the same dir or subdirs. */
330 while ((line = get_line(&pos))) {
333 if (strncmp(line, "source_", sizeof("source_")-1) == 0) {
334 p = strrchr(line, ' ');
336 warn("malformed line: %s\n", line);
340 if (!parse_file(p, md)) {
341 warn("could not open %s: %s\n",
347 if (strncmp(line, "deps_", sizeof("deps_")-1) == 0) {
354 /* Continue until line does not end with '\' */
355 if ( *(p + strlen(p)-1) != '\\')
357 /* Terminate line at first space, to get rid of final ' \' */
366 /* Check if this file is in same dir as objfile */
367 if ((strstr(line, dir)+strlen(dir)-1) == strrchr(line, '/')) {
368 if (!parse_file(line, md)) {
369 warn("could not open %s: %s\n",
370 line, strerror(errno));
378 /* Everyone parsed OK */
387 /* Calc and record src checksum. */
388 void get_src_version(const char *modname, char sum[], unsigned sumlen)
390 char *buf, *pos, *firstline;
393 char filelist[PATH_MAX + 1];
396 if (strends(modname, ".lto.o"))
399 /* objects for a module are listed in the first line of *.mod file. */
400 snprintf(filelist, sizeof(filelist), "%.*smod",
401 (int)strlen(modname) - postfix_len, modname);
403 buf = read_text_file(filelist);
406 firstline = get_line(&pos);
408 warn("bad ending versions file for %s\n", modname);
413 while ((fname = strsep(&firstline, " "))) {
416 if (!(is_static_library(fname)) &&
417 !parse_source_files(fname, &md))
421 md4_final_ascii(&md, sum, sumlen);