--- /dev/null
+/* xnu_uuid.c - transform 64-bit serial number
+ to 128-bit uuid suitable for xnu. */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 1995,1996,1998,1999,2001,2002,
+ * 2003, 2009 Free Software Foundation, Inc.
+ *
+ * GRUB 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/device.h>
+#include <grub/disk.h>
+#include <grub/fs.h>
+#include <grub/file.h>
+#include <grub/misc.h>
+#include <grub/env.h>
+#include <grub/command.h>
+
+struct tohash
+{
+ grub_uint8_t prefix[16];
+ grub_uint64_t serial;
+} __attribute__ ((packed));
+
+/* This prefix is used by xnu and boot-132 to hash
+ together with volume serial. */
+static grub_uint8_t hash_prefix[16]
+ = {0xB3, 0xE2, 0x0F, 0x39, 0xF2, 0x92, 0x11, 0xD6,
+ 0x97, 0xA4, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC};
+
+#define rol(x,n) ( ((x) << (n)) | ((x) >> (32-(n))) )
+#define ror(x,n) ( ((x) >> (n)) | ((x) << (32-(n))) )
+
+typedef struct {
+ grub_uint32_t A,B,C,D; /* chaining variables */
+ grub_uint32_t nblocks;
+ grub_uint8_t buf[64];
+ int count;
+} MD5_CONTEXT;
+
+static void
+md5_init( void *context )
+{
+ MD5_CONTEXT *ctx = context;
+
+ ctx->A = 0x67452301;
+ ctx->B = 0xefcdab89;
+ ctx->C = 0x98badcfe;
+ ctx->D = 0x10325476;
+
+ ctx->nblocks = 0;
+ ctx->count = 0;
+}
+
+/* These are the four functions used in the four steps of the MD5 algorithm
+ and defined in the RFC 1321. The first function is a little bit optimized
+ (as found in Colin Plumbs public domain implementation). */
+/* #define FF(b, c, d) ((b & c) | (~b & d)) */
+#define FF(b, c, d) (d ^ (b & (c ^ d)))
+#define FG(b, c, d) FF (d, b, c)
+#define FH(b, c, d) (b ^ c ^ d)
+#define FI(b, c, d) (c ^ (b | ~d))
+
+
+/****************
+ * transform n*64 grub_uint8_ts
+ */
+static void
+transform ( MD5_CONTEXT *ctx, const unsigned char *data )
+{
+ grub_uint32_t correct_words[16];
+ register grub_uint32_t A = ctx->A;
+ register grub_uint32_t B = ctx->B;
+ register grub_uint32_t C = ctx->C;
+ register grub_uint32_t D = ctx->D;
+ grub_uint32_t *cwp = correct_words;
+
+#ifdef WORDS_BIGENDIAN
+ {
+ int i;
+ grub_uint8_t *p2, *p1;
+ for(i=0, p1=data, p2=(grub_uint8_t*)correct_words; i < 16; i++, p2 += 4 )
+ {
+ p2[3] = *p1++;
+ p2[2] = *p1++;
+ p2[1] = *p1++;
+ p2[0] = *p1++;
+ }
+ }
+#else
+ memcpy( correct_words, data, 64 );
+#endif
+
+#define OP(a, b, c, d, s, T) \
+ do \
+ { \
+ a += FF (b, c, d) + (*cwp++) + T; \
+ a = rol(a, s); \
+ a += b; \
+ } \
+ while (0)
+
+ /* Before we start, one word about the strange constants.
+ They are defined in RFC 1321 as
+
+ T[i] = (int) (4294967296.0 * fabs (sin (i))), i=1..64
+ */
+
+ /* Round 1. */
+ OP (A, B, C, D, 7, 0xd76aa478);
+ OP (D, A, B, C, 12, 0xe8c7b756);
+ OP (C, D, A, B, 17, 0x242070db);
+ OP (B, C, D, A, 22, 0xc1bdceee);
+ OP (A, B, C, D, 7, 0xf57c0faf);
+ OP (D, A, B, C, 12, 0x4787c62a);
+ OP (C, D, A, B, 17, 0xa8304613);
+ OP (B, C, D, A, 22, 0xfd469501);
+ OP (A, B, C, D, 7, 0x698098d8);
+ OP (D, A, B, C, 12, 0x8b44f7af);
+ OP (C, D, A, B, 17, 0xffff5bb1);
+ OP (B, C, D, A, 22, 0x895cd7be);
+ OP (A, B, C, D, 7, 0x6b901122);
+ OP (D, A, B, C, 12, 0xfd987193);
+ OP (C, D, A, B, 17, 0xa679438e);
+ OP (B, C, D, A, 22, 0x49b40821);
+
+#undef OP
+#define OP(f, a, b, c, d, k, s, T) \
+ do \
+ { \
+ a += f (b, c, d) + correct_words[k] + T; \
+ a = rol(a, s); \
+ a += b; \
+ } \
+ while (0)
+
+ /* Round 2. */
+ OP (FG, A, B, C, D, 1, 5, 0xf61e2562);
+ OP (FG, D, A, B, C, 6, 9, 0xc040b340);
+ OP (FG, C, D, A, B, 11, 14, 0x265e5a51);
+ OP (FG, B, C, D, A, 0, 20, 0xe9b6c7aa);
+ OP (FG, A, B, C, D, 5, 5, 0xd62f105d);
+ OP (FG, D, A, B, C, 10, 9, 0x02441453);
+ OP (FG, C, D, A, B, 15, 14, 0xd8a1e681);
+ OP (FG, B, C, D, A, 4, 20, 0xe7d3fbc8);
+ OP (FG, A, B, C, D, 9, 5, 0x21e1cde6);
+ OP (FG, D, A, B, C, 14, 9, 0xc33707d6);
+ OP (FG, C, D, A, B, 3, 14, 0xf4d50d87);
+ OP (FG, B, C, D, A, 8, 20, 0x455a14ed);
+ OP (FG, A, B, C, D, 13, 5, 0xa9e3e905);
+ OP (FG, D, A, B, C, 2, 9, 0xfcefa3f8);
+ OP (FG, C, D, A, B, 7, 14, 0x676f02d9);
+ OP (FG, B, C, D, A, 12, 20, 0x8d2a4c8a);
+
+ /* Round 3. */
+ OP (FH, A, B, C, D, 5, 4, 0xfffa3942);
+ OP (FH, D, A, B, C, 8, 11, 0x8771f681);
+ OP (FH, C, D, A, B, 11, 16, 0x6d9d6122);
+ OP (FH, B, C, D, A, 14, 23, 0xfde5380c);
+ OP (FH, A, B, C, D, 1, 4, 0xa4beea44);
+ OP (FH, D, A, B, C, 4, 11, 0x4bdecfa9);
+ OP (FH, C, D, A, B, 7, 16, 0xf6bb4b60);
+ OP (FH, B, C, D, A, 10, 23, 0xbebfbc70);
+ OP (FH, A, B, C, D, 13, 4, 0x289b7ec6);
+ OP (FH, D, A, B, C, 0, 11, 0xeaa127fa);
+ OP (FH, C, D, A, B, 3, 16, 0xd4ef3085);
+ OP (FH, B, C, D, A, 6, 23, 0x04881d05);
+ OP (FH, A, B, C, D, 9, 4, 0xd9d4d039);
+ OP (FH, D, A, B, C, 12, 11, 0xe6db99e5);
+ OP (FH, C, D, A, B, 15, 16, 0x1fa27cf8);
+ OP (FH, B, C, D, A, 2, 23, 0xc4ac5665);
+
+ /* Round 4. */
+ OP (FI, A, B, C, D, 0, 6, 0xf4292244);
+ OP (FI, D, A, B, C, 7, 10, 0x432aff97);
+ OP (FI, C, D, A, B, 14, 15, 0xab9423a7);
+ OP (FI, B, C, D, A, 5, 21, 0xfc93a039);
+ OP (FI, A, B, C, D, 12, 6, 0x655b59c3);
+ OP (FI, D, A, B, C, 3, 10, 0x8f0ccc92);
+ OP (FI, C, D, A, B, 10, 15, 0xffeff47d);
+ OP (FI, B, C, D, A, 1, 21, 0x85845dd1);
+ OP (FI, A, B, C, D, 8, 6, 0x6fa87e4f);
+ OP (FI, D, A, B, C, 15, 10, 0xfe2ce6e0);
+ OP (FI, C, D, A, B, 6, 15, 0xa3014314);
+ OP (FI, B, C, D, A, 13, 21, 0x4e0811a1);
+ OP (FI, A, B, C, D, 4, 6, 0xf7537e82);
+ OP (FI, D, A, B, C, 11, 10, 0xbd3af235);
+ OP (FI, C, D, A, B, 2, 15, 0x2ad7d2bb);
+ OP (FI, B, C, D, A, 9, 21, 0xeb86d391);
+
+ /* Put checksum in context given as argument. */
+ ctx->A += A;
+ ctx->B += B;
+ ctx->C += C;
+ ctx->D += D;
+}
+
+/* The routine updates the message-digest context to
+ * account for the presence of each of the characters inBuf[0..inLen-1]
+ * in the message whose digest is being computed.
+ */
+static void
+md5_write( void *context, const void *inbuf_arg , grub_size_t inlen)
+{
+ const unsigned char *inbuf = inbuf_arg;
+ MD5_CONTEXT *hd = context;
+
+ if( hd->count == 64 ) /* flush the buffer */
+ {
+ transform( hd, hd->buf );
+ // _gcry_burn_stack (80+6*sizeof(void*));
+ hd->count = 0;
+ hd->nblocks++;
+ }
+ if( !inbuf )
+ return;
+
+ if( hd->count )
+ {
+ for( ; inlen && hd->count < 64; inlen-- )
+ hd->buf[hd->count++] = *inbuf++;
+ md5_write( hd, NULL, 0 );
+ if( !inlen )
+ return;
+ }
+ // _gcry_burn_stack (80+6*sizeof(void*));
+
+ while( inlen >= 64 )
+ {
+ transform( hd, inbuf );
+ hd->count = 0;
+ hd->nblocks++;
+ inlen -= 64;
+ inbuf += 64;
+ }
+ for( ; inlen && hd->count < 64; inlen-- )
+ hd->buf[hd->count++] = *inbuf++;
+
+}
+
+
+
+/* The routine final terminates the message-digest computation and
+ * ends with the desired message digest in mdContext->digest[0...15].
+ * The handle is prepared for a new MD5 cycle.
+ * Returns 16 grub_uint8_ts representing the digest.
+ */
+static void
+md5_final( void *context)
+{
+ MD5_CONTEXT *hd = context;
+ grub_uint32_t t, msb, lsb;
+ grub_uint8_t *p;
+
+ md5_write(hd, NULL, 0); /* flush */;
+
+ t = hd->nblocks;
+ /* multiply by 64 to make a grub_uint8_t count */
+ lsb = t << 6;
+ msb = t >> 26;
+ /* add the count */
+ t = lsb;
+ if( (lsb += hd->count) < t )
+ msb++;
+ /* multiply by 8 to make a bit count */
+ t = lsb;
+ lsb <<= 3;
+ msb <<= 3;
+ msb |= t >> 29;
+
+ if( hd->count < 56 ) /* enough room */
+ {
+ hd->buf[hd->count++] = 0x80; /* pad */
+ while( hd->count < 56 )
+ hd->buf[hd->count++] = 0; /* pad */
+ }
+ else /* need one extra block */
+ {
+ hd->buf[hd->count++] = 0x80; /* pad character */
+ while( hd->count < 64 )
+ hd->buf[hd->count++] = 0;
+ md5_write(hd, NULL, 0); /* flush */;
+ grub_memset(hd->buf, 0, 56 ); /* fill next block with zeroes */
+ }
+ /* append the 64 bit count */
+ hd->buf[56] = lsb ;
+ hd->buf[57] = lsb >> 8;
+ hd->buf[58] = lsb >> 16;
+ hd->buf[59] = lsb >> 24;
+ hd->buf[60] = msb ;
+ hd->buf[61] = msb >> 8;
+ hd->buf[62] = msb >> 16;
+ hd->buf[63] = msb >> 24;
+ transform( hd, hd->buf );
+ // _gcry_burn_stack (80+6*sizeof(void*));
+
+ p = hd->buf;
+#ifdef WORDS_BIGENDIAN
+#define X(a) do { *p++ = hd->a ; *p++ = hd->a >> 8; \
+ *p++ = hd->a >> 16; *p++ = hd->a >> 24; } while(0)
+#else /* little endian */
+#define X(a) do { *(grub_uint32_t*)p = (*hd).a ; p += 4; } while(0)
+#endif
+ X(A);
+ X(B);
+ X(C);
+ X(D);
+#undef X
+
+}
+
+/**
+ * GRUB2 Crypto Interface
+ * Written by Michael Gorven
+ */
+static grub_err_t
+md5 (const char *in, grub_size_t insize, char *out)
+{
+ MD5_CONTEXT hd;
+
+ md5_init (&hd);
+ md5_write (&hd, in, insize);
+ md5_final (&hd);
+ grub_memcpy (out, hd.buf, 16);
+
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_cmd_xnu_uuid (grub_command_t cmd __attribute__ ((unused)),
+ int argc, char **args)
+{
+ struct tohash hashme;
+ grub_uint8_t xnu_uuid[16];
+ char uuid_string[sizeof ("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")];
+ char *ptr;
+
+ if (argc < 1)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, "UUID required");
+
+ hashme.serial = grub_cpu_to_be64 (grub_strtoull (args[0], 0, 16));
+ grub_memcpy (hashme.prefix, hash_prefix, sizeof (hashme.prefix));
+
+ md5 ((char *) &hashme, sizeof (hashme), (char *) xnu_uuid);
+ xnu_uuid[6] = (xnu_uuid[6] & 0xf) | 0x30;
+ xnu_uuid[8] = (xnu_uuid[8] & 0x3f) | 0x80;
+ grub_sprintf (uuid_string,
+ "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+ (unsigned int) xnu_uuid[0], (unsigned int) xnu_uuid[1],
+ (unsigned int) xnu_uuid[2], (unsigned int) xnu_uuid[3],
+ (unsigned int) xnu_uuid[4], (unsigned int) xnu_uuid[5],
+ (unsigned int) ((xnu_uuid[6] & 0xf) | 0x30),
+ (unsigned int) xnu_uuid[7],
+ (unsigned int) ((xnu_uuid[8] & 0x3f) | 0x80),
+ (unsigned int) xnu_uuid[9],
+ (unsigned int) xnu_uuid[10], (unsigned int) xnu_uuid[11],
+ (unsigned int) xnu_uuid[12], (unsigned int) xnu_uuid[13],
+ (unsigned int) xnu_uuid[14], (unsigned int) xnu_uuid[15]);
+ for (ptr = uuid_string; *ptr; ptr++)
+ *ptr = grub_toupper (*ptr);
+ if (argc == 1)
+ grub_printf ("%s", uuid_string);
+ if (argc > 1)
+ grub_env_set (args[1], uuid_string);
+
+ return GRUB_ERR_NONE;
+}
+
+static grub_command_t cmd;
+
+
+GRUB_MOD_INIT (xnu_uuid)
+{
+ cmd = grub_register_command ("xnu_uuid", grub_cmd_xnu_uuid,
+ "xnu_uuid GRUBUUID [VARNAME]",
+ "Transform 64-bit UUID to format "
+ "suitable for xnu.");
+}
+
+GRUB_MOD_FINI (xnu_uuid)
+{
+ grub_unregister_command (cmd);
+}
projects / thirdparty / grub.git / commitdiff
