1 /* xnu_uuid.c - transform 64-bit serial number
2 to 128-bit uuid suitable for xnu. */
4 * GRUB -- GRand Unified Bootloader
5 * Copyright (C) 1995,1996,1998,1999,2001,2002,
6 * 2003, 2009 Free Software Foundation, Inc.
8 * GRUB is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version.
13 * GRUB is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
22 #include <grub/types.h>
23 #include <grub/misc.h>
27 #include <grub/device.h>
28 #include <grub/disk.h>
30 #include <grub/file.h>
31 #include <grub/misc.h>
33 #include <grub/command.h>
37 grub_uint8_t prefix
[16];
39 } __attribute__ ((packed
));
41 /* This prefix is used by xnu and boot-132 to hash
42 together with volume serial. */
43 static grub_uint8_t hash_prefix
[16]
44 = {0xB3, 0xE2, 0x0F, 0x39, 0xF2, 0x92, 0x11, 0xD6,
45 0x97, 0xA4, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC};
47 #define rol(x,n) ( ((x) << (n)) | ((x) >> (32-(n))) )
48 #define ror(x,n) ( ((x) >> (n)) | ((x) << (32-(n))) )
51 grub_uint32_t A
,B
,C
,D
; /* chaining variables */
52 grub_uint32_t nblocks
;
58 md5_init( void *context
)
60 MD5_CONTEXT
*ctx
= context
;
71 /* These are the four functions used in the four steps of the MD5 algorithm
72 and defined in the RFC 1321. The first function is a little bit optimized
73 (as found in Colin Plumbs public domain implementation). */
74 /* #define FF(b, c, d) ((b & c) | (~b & d)) */
75 #define FF(b, c, d) (d ^ (b & (c ^ d)))
76 #define FG(b, c, d) FF (d, b, c)
77 #define FH(b, c, d) (b ^ c ^ d)
78 #define FI(b, c, d) (c ^ (b | ~d))
82 * transform n*64 grub_uint8_ts
85 transform ( MD5_CONTEXT
*ctx
, const unsigned char *data
)
87 grub_uint32_t correct_words
[16];
88 register grub_uint32_t A
= ctx
->A
;
89 register grub_uint32_t B
= ctx
->B
;
90 register grub_uint32_t C
= ctx
->C
;
91 register grub_uint32_t D
= ctx
->D
;
92 grub_uint32_t
*cwp
= correct_words
;
94 #ifdef WORDS_BIGENDIAN
97 grub_uint8_t
*p2
, *p1
;
98 for(i
=0, p1
=data
, p2
=(grub_uint8_t
*)correct_words
; i
< 16; i
++, p2
+= 4 )
107 memcpy( correct_words
, data
, 64 );
110 #define OP(a, b, c, d, s, T) \
113 a += FF (b, c, d) + (*cwp++) + T; \
119 /* Before we start, one word about the strange constants.
120 They are defined in RFC 1321 as
122 T[i] = (int) (4294967296.0 * fabs (sin (i))), i=1..64
126 OP (A
, B
, C
, D
, 7, 0xd76aa478);
127 OP (D
, A
, B
, C
, 12, 0xe8c7b756);
128 OP (C
, D
, A
, B
, 17, 0x242070db);
129 OP (B
, C
, D
, A
, 22, 0xc1bdceee);
130 OP (A
, B
, C
, D
, 7, 0xf57c0faf);
131 OP (D
, A
, B
, C
, 12, 0x4787c62a);
132 OP (C
, D
, A
, B
, 17, 0xa8304613);
133 OP (B
, C
, D
, A
, 22, 0xfd469501);
134 OP (A
, B
, C
, D
, 7, 0x698098d8);
135 OP (D
, A
, B
, C
, 12, 0x8b44f7af);
136 OP (C
, D
, A
, B
, 17, 0xffff5bb1);
137 OP (B
, C
, D
, A
, 22, 0x895cd7be);
138 OP (A
, B
, C
, D
, 7, 0x6b901122);
139 OP (D
, A
, B
, C
, 12, 0xfd987193);
140 OP (C
, D
, A
, B
, 17, 0xa679438e);
141 OP (B
, C
, D
, A
, 22, 0x49b40821);
144 #define OP(f, a, b, c, d, k, s, T) \
147 a += f (b, c, d) + correct_words[k] + T; \
154 OP (FG
, A
, B
, C
, D
, 1, 5, 0xf61e2562);
155 OP (FG
, D
, A
, B
, C
, 6, 9, 0xc040b340);
156 OP (FG
, C
, D
, A
, B
, 11, 14, 0x265e5a51);
157 OP (FG
, B
, C
, D
, A
, 0, 20, 0xe9b6c7aa);
158 OP (FG
, A
, B
, C
, D
, 5, 5, 0xd62f105d);
159 OP (FG
, D
, A
, B
, C
, 10, 9, 0x02441453);
160 OP (FG
, C
, D
, A
, B
, 15, 14, 0xd8a1e681);
161 OP (FG
, B
, C
, D
, A
, 4, 20, 0xe7d3fbc8);
162 OP (FG
, A
, B
, C
, D
, 9, 5, 0x21e1cde6);
163 OP (FG
, D
, A
, B
, C
, 14, 9, 0xc33707d6);
164 OP (FG
, C
, D
, A
, B
, 3, 14, 0xf4d50d87);
165 OP (FG
, B
, C
, D
, A
, 8, 20, 0x455a14ed);
166 OP (FG
, A
, B
, C
, D
, 13, 5, 0xa9e3e905);
167 OP (FG
, D
, A
, B
, C
, 2, 9, 0xfcefa3f8);
168 OP (FG
, C
, D
, A
, B
, 7, 14, 0x676f02d9);
169 OP (FG
, B
, C
, D
, A
, 12, 20, 0x8d2a4c8a);
172 OP (FH
, A
, B
, C
, D
, 5, 4, 0xfffa3942);
173 OP (FH
, D
, A
, B
, C
, 8, 11, 0x8771f681);
174 OP (FH
, C
, D
, A
, B
, 11, 16, 0x6d9d6122);
175 OP (FH
, B
, C
, D
, A
, 14, 23, 0xfde5380c);
176 OP (FH
, A
, B
, C
, D
, 1, 4, 0xa4beea44);
177 OP (FH
, D
, A
, B
, C
, 4, 11, 0x4bdecfa9);
178 OP (FH
, C
, D
, A
, B
, 7, 16, 0xf6bb4b60);
179 OP (FH
, B
, C
, D
, A
, 10, 23, 0xbebfbc70);
180 OP (FH
, A
, B
, C
, D
, 13, 4, 0x289b7ec6);
181 OP (FH
, D
, A
, B
, C
, 0, 11, 0xeaa127fa);
182 OP (FH
, C
, D
, A
, B
, 3, 16, 0xd4ef3085);
183 OP (FH
, B
, C
, D
, A
, 6, 23, 0x04881d05);
184 OP (FH
, A
, B
, C
, D
, 9, 4, 0xd9d4d039);
185 OP (FH
, D
, A
, B
, C
, 12, 11, 0xe6db99e5);
186 OP (FH
, C
, D
, A
, B
, 15, 16, 0x1fa27cf8);
187 OP (FH
, B
, C
, D
, A
, 2, 23, 0xc4ac5665);
190 OP (FI
, A
, B
, C
, D
, 0, 6, 0xf4292244);
191 OP (FI
, D
, A
, B
, C
, 7, 10, 0x432aff97);
192 OP (FI
, C
, D
, A
, B
, 14, 15, 0xab9423a7);
193 OP (FI
, B
, C
, D
, A
, 5, 21, 0xfc93a039);
194 OP (FI
, A
, B
, C
, D
, 12, 6, 0x655b59c3);
195 OP (FI
, D
, A
, B
, C
, 3, 10, 0x8f0ccc92);
196 OP (FI
, C
, D
, A
, B
, 10, 15, 0xffeff47d);
197 OP (FI
, B
, C
, D
, A
, 1, 21, 0x85845dd1);
198 OP (FI
, A
, B
, C
, D
, 8, 6, 0x6fa87e4f);
199 OP (FI
, D
, A
, B
, C
, 15, 10, 0xfe2ce6e0);
200 OP (FI
, C
, D
, A
, B
, 6, 15, 0xa3014314);
201 OP (FI
, B
, C
, D
, A
, 13, 21, 0x4e0811a1);
202 OP (FI
, A
, B
, C
, D
, 4, 6, 0xf7537e82);
203 OP (FI
, D
, A
, B
, C
, 11, 10, 0xbd3af235);
204 OP (FI
, C
, D
, A
, B
, 2, 15, 0x2ad7d2bb);
205 OP (FI
, B
, C
, D
, A
, 9, 21, 0xeb86d391);
207 /* Put checksum in context given as argument. */
214 /* The routine updates the message-digest context to
215 * account for the presence of each of the characters inBuf[0..inLen-1]
216 * in the message whose digest is being computed.
219 md5_write( void *context
, const void *inbuf_arg
, grub_size_t inlen
)
221 const unsigned char *inbuf
= inbuf_arg
;
222 MD5_CONTEXT
*hd
= context
;
224 if( hd
->count
== 64 ) /* flush the buffer */
226 transform( hd
, hd
->buf
);
227 // _gcry_burn_stack (80+6*sizeof(void*));
236 for( ; inlen
&& hd
->count
< 64; inlen
-- )
237 hd
->buf
[hd
->count
++] = *inbuf
++;
238 md5_write( hd
, NULL
, 0 );
242 // _gcry_burn_stack (80+6*sizeof(void*));
246 transform( hd
, inbuf
);
252 for( ; inlen
&& hd
->count
< 64; inlen
-- )
253 hd
->buf
[hd
->count
++] = *inbuf
++;
259 /* The routine final terminates the message-digest computation and
260 * ends with the desired message digest in mdContext->digest[0...15].
261 * The handle is prepared for a new MD5 cycle.
262 * Returns 16 grub_uint8_ts representing the digest.
265 md5_final( void *context
)
267 MD5_CONTEXT
*hd
= context
;
268 grub_uint32_t t
, msb
, lsb
;
271 md5_write(hd
, NULL
, 0); /* flush */;
274 /* multiply by 64 to make a grub_uint8_t count */
279 if( (lsb
+= hd
->count
) < t
)
281 /* multiply by 8 to make a bit count */
287 if( hd
->count
< 56 ) /* enough room */
289 hd
->buf
[hd
->count
++] = 0x80; /* pad */
290 while( hd
->count
< 56 )
291 hd
->buf
[hd
->count
++] = 0; /* pad */
293 else /* need one extra block */
295 hd
->buf
[hd
->count
++] = 0x80; /* pad character */
296 while( hd
->count
< 64 )
297 hd
->buf
[hd
->count
++] = 0;
298 md5_write(hd
, NULL
, 0); /* flush */;
299 grub_memset(hd
->buf
, 0, 56 ); /* fill next block with zeroes */
301 /* append the 64 bit count */
303 hd
->buf
[57] = lsb
>> 8;
304 hd
->buf
[58] = lsb
>> 16;
305 hd
->buf
[59] = lsb
>> 24;
307 hd
->buf
[61] = msb
>> 8;
308 hd
->buf
[62] = msb
>> 16;
309 hd
->buf
[63] = msb
>> 24;
310 transform( hd
, hd
->buf
);
311 // _gcry_burn_stack (80+6*sizeof(void*));
314 #ifdef WORDS_BIGENDIAN
315 #define X(a) do { *p++ = hd->a ; *p++ = hd->a >> 8; \
316 *p++ = hd->a >> 16; *p++ = hd->a >> 24; } while(0)
317 #else /* little endian */
318 #define X(a) do { *(grub_uint32_t*)p = (*hd).a ; p += 4; } while(0)
329 * GRUB2 Crypto Interface
330 * Written by Michael Gorven
333 md5 (const char *in
, grub_size_t insize
, char *out
)
338 md5_write (&hd
, in
, insize
);
340 grub_memcpy (out
, hd
.buf
, 16);
342 return GRUB_ERR_NONE
;
346 grub_cmd_xnu_uuid (grub_command_t cmd
__attribute__ ((unused
)),
347 int argc
, char **args
)
349 struct tohash hashme
;
350 grub_uint8_t xnu_uuid
[16];
351 char uuid_string
[sizeof ("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")];
355 return grub_error (GRUB_ERR_BAD_ARGUMENT
, "UUID required");
357 hashme
.serial
= grub_cpu_to_be64 (grub_strtoull (args
[0], 0, 16));
358 grub_memcpy (hashme
.prefix
, hash_prefix
, sizeof (hashme
.prefix
));
360 md5 ((char *) &hashme
, sizeof (hashme
), (char *) xnu_uuid
);
361 xnu_uuid
[6] = (xnu_uuid
[6] & 0xf) | 0x30;
362 xnu_uuid
[8] = (xnu_uuid
[8] & 0x3f) | 0x80;
363 grub_sprintf (uuid_string
,
364 "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
365 (unsigned int) xnu_uuid
[0], (unsigned int) xnu_uuid
[1],
366 (unsigned int) xnu_uuid
[2], (unsigned int) xnu_uuid
[3],
367 (unsigned int) xnu_uuid
[4], (unsigned int) xnu_uuid
[5],
368 (unsigned int) ((xnu_uuid
[6] & 0xf) | 0x30),
369 (unsigned int) xnu_uuid
[7],
370 (unsigned int) ((xnu_uuid
[8] & 0x3f) | 0x80),
371 (unsigned int) xnu_uuid
[9],
372 (unsigned int) xnu_uuid
[10], (unsigned int) xnu_uuid
[11],
373 (unsigned int) xnu_uuid
[12], (unsigned int) xnu_uuid
[13],
374 (unsigned int) xnu_uuid
[14], (unsigned int) xnu_uuid
[15]);
375 for (ptr
= uuid_string
; *ptr
; ptr
++)
376 *ptr
= grub_toupper (*ptr
);
378 grub_printf ("%s", uuid_string
);
380 grub_env_set (args
[1], uuid_string
);
382 return GRUB_ERR_NONE
;
385 static grub_command_t cmd
;
388 GRUB_MOD_INIT (xnu_uuid
)
390 cmd
= grub_register_command ("xnu_uuid", grub_cmd_xnu_uuid
,
391 "xnu_uuid GRUBUUID [VARNAME]",
392 "Transform 64-bit UUID to format "
393 "suitable for xnu.");
396 GRUB_MOD_FINI (xnu_uuid
)
398 grub_unregister_command (cmd
);