#include <grub/misc.h>
#include <grub/env.h>
#include <grub/command.h>
+#include <grub/crypto.h>
-struct tohash
-{
- grub_uint8_t prefix[16];
- grub_uint64_t serial;
-} __attribute__ ((packed));
+extern gcry_md_spec_t _gcry_digest_spec_md5;
/* This prefix is used by xnu and boot-132 to hash
together with volume serial. */
= {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 GRUB_CPU_WORDS_BIGENDIAN
- {
- int i;
- const grub_uint32_t *p = (const grub_uint32_t *) data;
-
- for (i = 0; i < 16; i++)
- correct_words[i] = grub_le_to_cpu32 (p[i]);
- }
-#else
- grub_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_uint32_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 = (grub_uint32_t *) hd->buf;
-#define X(a) do { *p = grub_le_to_cpu32 (hd->a); p++; } while (0)
- 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];
+ grub_uint64_t serial;
+ grub_uint8_t *xnu_uuid;
char uuid_string[sizeof ("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")];
char *ptr;
+ grub_uint8_t ctx[_gcry_digest_spec_md5.contextsize];
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));
+ serial = grub_cpu_to_be64 (grub_strtoull (args[0], 0, 16));
+
+ _gcry_digest_spec_md5.init (&ctx);
+ _gcry_digest_spec_md5.write (&ctx, hash_prefix, sizeof (hash_prefix));
+ _gcry_digest_spec_md5.write (&ctx, &serial, sizeof (serial));
+ _gcry_digest_spec_md5.final (&ctx);
+ xnu_uuid = _gcry_digest_spec_md5.read (&ctx);
- md5 ((char *) &hashme, sizeof (hashme), (char *) xnu_uuid);
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],
projects / grub2.git / commitdiff