XZ CRC64 and SHA256 support.
* Makefile.util.def (libgrubmods): Add crc64.c. * grub-core/Makefile.core.def (crc64): New module. * grub-core/lib/crc64.c: New file. * grub-core/lib/xzembed/xz_dec_stream.c (xz_dec_hash) [!GRUB_EMBED_DECOMPRESSOR]: Rename crc32_context to hash_context. Fix the type. (MAX_HASH_SIZE): New define. (xz_dec) [!GRUB_EMBED_DECOMPRESSOR]: Add generic hash fields. (dec_block) [!GRUB_EMBED_DECOMPRESSOR]: Handle non-crc32 hashes. (index_update) [!GRUB_EMBED_DECOMPRESSOR]: Likewise. (dec_index) [!GRUB_EMBED_DECOMPRESSOR]: Likewise. (crc32_validate) [!GRUB_EMBED_DECOMPRESSOR]: Rename to ... (hash_validate) [!GRUB_EMBED_DECOMPRESSOR]: ... this. Handle non-crc32 hashes. (hashes) [!GRUB_EMBED_DECOMPRESSOR]: New variable. (dec_stream_header): Handle non-crc32 hashes. (dec_stream_footer): Likewise. (dec_block_header): Likewise. (dec_main): Likewise. (xz_dec_init): Likewise. (xz_dec_reset): Likewise. (xz_dec_end): Likewise. * util/import_gcry.py: Add CRC64 line.
This commit is contained in:
Vladimir 'phcoder' Serbinenko
parent
9d9b3d2f02
commit
158dc1ea26
28
ChangeLog
28
ChangeLog
|
|
@ -1,3 +1,31 @@
|
|||
2011-11-03 Vladimir Serbinenko <phcoder@gmail.com>
|
||||
|
||||
XZ CRC64 and SHA256 support.
|
||||
|
||||
* Makefile.util.def (libgrubmods): Add crc64.c.
|
||||
* grub-core/Makefile.core.def (crc64): New module.
|
||||
* grub-core/lib/crc64.c: New file.
|
||||
* grub-core/lib/xzembed/xz_dec_stream.c (xz_dec_hash)
|
||||
[!GRUB_EMBED_DECOMPRESSOR]: Rename crc32_context to hash_context.
|
||||
Fix the type.
|
||||
(MAX_HASH_SIZE): New define.
|
||||
(xz_dec) [!GRUB_EMBED_DECOMPRESSOR]: Add generic hash fields.
|
||||
(dec_block) [!GRUB_EMBED_DECOMPRESSOR]: Handle non-crc32 hashes.
|
||||
(index_update) [!GRUB_EMBED_DECOMPRESSOR]: Likewise.
|
||||
(dec_index) [!GRUB_EMBED_DECOMPRESSOR]: Likewise.
|
||||
(crc32_validate) [!GRUB_EMBED_DECOMPRESSOR]: Rename to ...
|
||||
(hash_validate) [!GRUB_EMBED_DECOMPRESSOR]: ... this.
|
||||
Handle non-crc32 hashes.
|
||||
(hashes) [!GRUB_EMBED_DECOMPRESSOR]: New variable.
|
||||
(dec_stream_header): Handle non-crc32 hashes.
|
||||
(dec_stream_footer): Likewise.
|
||||
(dec_block_header): Likewise.
|
||||
(dec_main): Likewise.
|
||||
(xz_dec_init): Likewise.
|
||||
(xz_dec_reset): Likewise.
|
||||
(xz_dec_end): Likewise.
|
||||
* util/import_gcry.py: Add CRC64 line.
|
||||
|
||||
2011-11-03 Vladimir Serbinenko <phcoder@gmail.com>
|
||||
|
||||
* grub-core/fs/ufs.c (grub_ufs_mtime) [MODE_UFS2]: Check mtime field
|
||||
|
|
|
|||
|
|
@ -93,6 +93,7 @@ library = {
|
|||
common = grub-core/lib/LzmaEnc.c;
|
||||
common = grub-core/lib/crc.c;
|
||||
common = grub-core/lib/adler32.c;
|
||||
common = grub-core/lib/crc64.c;
|
||||
common = grub-core/normal/datetime.c;
|
||||
common = grub-core/normal/misc.c;
|
||||
common = grub-core/partmap/acorn.c;
|
||||
|
|
|
|||
|
|
@ -1698,3 +1698,8 @@ module = {
|
|||
name = adler32;
|
||||
common = lib/adler32.c;
|
||||
};
|
||||
|
||||
module = {
|
||||
name = crc64;
|
||||
common = lib/crc64.c;
|
||||
};
|
||||
|
|
|
|||
|
|
@ -0,0 +1,111 @@
|
|||
/* crc64.c - crc64 function */
|
||||
/*
|
||||
* GRUB -- GRand Unified Bootloader
|
||||
* Copyright (C) 2008,2011 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/dl.h>
|
||||
#include <grub/crypto.h>
|
||||
|
||||
static grub_uint64_t crc64_table [256];
|
||||
|
||||
static void
|
||||
init_crc64_table (void)
|
||||
{
|
||||
auto grub_uint64_t reflect (grub_uint64_t ref, int len);
|
||||
grub_uint64_t reflect (grub_uint64_t ref, int len)
|
||||
{
|
||||
grub_uint64_t result = 0;
|
||||
int i;
|
||||
|
||||
for (i = 1; i <= len; i++)
|
||||
{
|
||||
if (ref & 1)
|
||||
result |= 1ULL << (len - i);
|
||||
ref >>= 1;
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
grub_uint64_t polynomial = 0x42f0e1eba9ea3693ULL;
|
||||
int i, j;
|
||||
|
||||
for(i = 0; i < 256; i++)
|
||||
{
|
||||
crc64_table[i] = reflect(i, 8) << 56;
|
||||
for (j = 0; j < 8; j++)
|
||||
{
|
||||
crc64_table[i] = (crc64_table[i] << 1) ^
|
||||
(crc64_table[i] & (1ULL << 63) ? polynomial : 0);
|
||||
}
|
||||
crc64_table[i] = reflect(crc64_table[i], 64);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
crc64_init (void *context)
|
||||
{
|
||||
if (! crc64_table[1])
|
||||
init_crc64_table ();
|
||||
*(grub_uint64_t *) context = 0;
|
||||
}
|
||||
|
||||
static void
|
||||
crc64_write (void *context, const void *buf, grub_size_t size)
|
||||
{
|
||||
unsigned i;
|
||||
const grub_uint8_t *data = buf;
|
||||
grub_uint64_t crc = ~grub_le_to_cpu64 (*(grub_uint64_t *) context);
|
||||
|
||||
for (i = 0; i < size; i++)
|
||||
{
|
||||
crc = (crc >> 8) ^ crc64_table[(crc & 0xFF) ^ *data];
|
||||
data++;
|
||||
}
|
||||
|
||||
*(grub_uint64_t *) context = grub_cpu_to_le64 (~crc);
|
||||
}
|
||||
|
||||
static grub_uint8_t *
|
||||
crc64_read (void *context)
|
||||
{
|
||||
return context;
|
||||
}
|
||||
|
||||
static void
|
||||
crc64_final (void *context __attribute__ ((unused)))
|
||||
{
|
||||
}
|
||||
|
||||
gcry_md_spec_t _gcry_digest_spec_crc64 =
|
||||
{
|
||||
"CRC64", 0, 0, 0, 8,
|
||||
crc64_init, crc64_write, crc64_final, crc64_read,
|
||||
sizeof (grub_uint64_t),
|
||||
.blocksize = 64
|
||||
};
|
||||
|
||||
GRUB_MOD_INIT(crc64)
|
||||
{
|
||||
grub_md_register (&_gcry_digest_spec_crc64);
|
||||
}
|
||||
|
||||
GRUB_MOD_FINI(crc64)
|
||||
{
|
||||
grub_md_unregister (&_gcry_digest_spec_crc64);
|
||||
}
|
||||
|
|
@ -32,10 +32,13 @@ struct xz_dec_hash {
|
|||
vli_type unpadded;
|
||||
vli_type uncompressed;
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
uint8_t *crc32_context;
|
||||
uint64_t *hash_context;
|
||||
#endif
|
||||
};
|
||||
|
||||
/* Enough for up to 512 bits. */
|
||||
#define MAX_HASH_SIZE 64
|
||||
|
||||
struct xz_dec {
|
||||
/* Position in dec_main() */
|
||||
enum {
|
||||
|
|
@ -62,11 +65,22 @@ struct xz_dec {
|
|||
size_t out_start;
|
||||
|
||||
/* CRC32 value in Block or Index */
|
||||
uint32_t crc32_temp; /* need for crc32_validate*/
|
||||
uint8_t *crc32_context;
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
uint8_t hash_value[MAX_HASH_SIZE]; /* need for crc32_validate*/
|
||||
#endif
|
||||
int have_hash_value;
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
uint64_t *hash_context;
|
||||
uint64_t *crc32_context;
|
||||
#endif
|
||||
|
||||
/* True if CRC32 is calculated from uncompressed data */
|
||||
bool has_crc32;
|
||||
/* Hash function calculated from uncompressed data */
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
const gcry_md_spec_t *hash;
|
||||
const gcry_md_spec_t *crc32;
|
||||
#endif
|
||||
grub_size_t hash_size;
|
||||
grub_uint8_t hash_id;
|
||||
|
||||
/* True if we are operating in single-call mode. */
|
||||
bool single_call;
|
||||
|
|
@ -250,9 +264,12 @@ static enum xz_ret dec_block(struct xz_dec *s, struct xz_buf *b)
|
|||
return XZ_DATA_ERROR;
|
||||
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
if (s->has_crc32)
|
||||
GRUB_MD_CRC32->write(s->crc32_context,b->out + s->out_start,
|
||||
b->out_pos - s->out_start);
|
||||
if (s->hash)
|
||||
s->hash->write(s->hash_context,b->out + s->out_start,
|
||||
b->out_pos - s->out_start);
|
||||
if (s->crc32)
|
||||
s->crc32->write(s->crc32_context,b->out + s->out_start,
|
||||
b->out_pos - s->out_start);
|
||||
#endif
|
||||
|
||||
if (ret == XZ_STREAM_END) {
|
||||
|
|
@ -268,14 +285,15 @@ static enum xz_ret dec_block(struct xz_dec *s, struct xz_buf *b)
|
|||
|
||||
s->block.hash.unpadded += s->block_header.size
|
||||
+ s->block.compressed;
|
||||
if (s->has_crc32)
|
||||
s->block.hash.unpadded += 4;
|
||||
s->block.hash.unpadded += s->hash_size;
|
||||
|
||||
s->block.hash.uncompressed += s->block.uncompressed;
|
||||
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
GRUB_MD_CRC32->write(s->block.hash.crc32_context,
|
||||
(const uint8_t *)&s->block.hash, 2 * sizeof(vli_type));
|
||||
if (s->hash)
|
||||
s->hash->write(s->block.hash.hash_context,
|
||||
(const uint8_t *)&s->block.hash,
|
||||
2 * sizeof(vli_type));
|
||||
#endif
|
||||
|
||||
++s->block.count;
|
||||
|
|
@ -290,7 +308,10 @@ static void index_update(struct xz_dec *s, const struct xz_buf *b)
|
|||
size_t in_used = b->in_pos - s->in_start;
|
||||
s->index.size += in_used;
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
GRUB_MD_CRC32->write(s->crc32_context,b->in + s->in_start, in_used);
|
||||
if (s->hash)
|
||||
s->hash->write(s->hash_context,b->in + s->in_start, in_used);
|
||||
if (s->crc32)
|
||||
s->crc32->write(s->crc32_context,b->in + s->in_start, in_used);
|
||||
#endif
|
||||
}
|
||||
|
||||
|
|
@ -337,8 +358,9 @@ static enum xz_ret dec_index(struct xz_dec *s, struct xz_buf *b)
|
|||
s->index.hash.uncompressed += s->vli;
|
||||
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
GRUB_MD_CRC32->write(s->index.hash.crc32_context,
|
||||
(const uint8_t *)&s->index.hash, 2 * sizeof(vli_type));
|
||||
if (s->hash)
|
||||
s->hash->write(s->index.hash.hash_context,
|
||||
(const uint8_t *)&s->index.hash, 2 * sizeof(vli_type));
|
||||
#endif
|
||||
|
||||
--s->index.count;
|
||||
|
|
@ -354,13 +376,30 @@ static enum xz_ret dec_index(struct xz_dec *s, struct xz_buf *b)
|
|||
* Validate that the next four input bytes match the value of s->crc32.
|
||||
* s->pos must be zero when starting to validate the first byte.
|
||||
*/
|
||||
static enum xz_ret crc32_validate(struct xz_dec *s, struct xz_buf *b)
|
||||
static enum xz_ret hash_validate(struct xz_dec *s, struct xz_buf *b,
|
||||
int crc32)
|
||||
{
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
if(s->crc32_temp == 0)
|
||||
const gcry_md_spec_t *hash = crc32 ? s->crc32 : s->hash;
|
||||
grub_uint64_t *hash_context = crc32 ? s->crc32_context
|
||||
: s->hash_context;
|
||||
if(!s->have_hash_value && hash
|
||||
&& sizeof (s->hash_value) >= hash->mdlen)
|
||||
{
|
||||
GRUB_MD_CRC32->final(s->crc32_context);
|
||||
s->crc32_temp = get_unaligned_be32(GRUB_MD_CRC32->read(s->crc32_context));
|
||||
hash->final(hash_context);
|
||||
grub_memcpy (s->hash_value, hash->read(hash_context),
|
||||
hash->mdlen);
|
||||
s->have_hash_value = 1;
|
||||
if (s->hash_id == 1 || crc32)
|
||||
{
|
||||
grub_uint8_t t;
|
||||
t = s->hash_value[0];
|
||||
s->hash_value[0] = s->hash_value[3];
|
||||
s->hash_value[3] = t;
|
||||
t = s->hash_value[1];
|
||||
s->hash_value[1] = s->hash_value[2];
|
||||
s->hash_value[2] = t;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
|
|
@ -369,23 +408,38 @@ static enum xz_ret crc32_validate(struct xz_dec *s, struct xz_buf *b)
|
|||
return XZ_OK;
|
||||
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
if (((s->crc32_temp >> s->pos) & 0xFF) != b->in[b->in_pos++])
|
||||
if (hash && s->hash_value[s->pos / 8] != b->in[b->in_pos++])
|
||||
return XZ_DATA_ERROR;
|
||||
#endif
|
||||
|
||||
s->pos += 8;
|
||||
|
||||
} while (s->pos < 32);
|
||||
} while (s->pos < (crc32 ? 32 : s->hash_size * 8));
|
||||
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
GRUB_MD_CRC32->init(s->crc32_context);
|
||||
if (s->hash)
|
||||
s->hash->init(s->hash_context);
|
||||
if (s->crc32)
|
||||
s->crc32->init(s->crc32_context);
|
||||
#endif
|
||||
s->crc32_temp = 0;
|
||||
s->have_hash_value = 0;
|
||||
s->pos = 0;
|
||||
|
||||
return XZ_STREAM_END;
|
||||
}
|
||||
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
static struct
|
||||
{
|
||||
const char *name;
|
||||
grub_size_t size;
|
||||
} hashes[] = {
|
||||
[0x01] = { "CRC32", 4},
|
||||
[0x04] = { "CRC64", 8},
|
||||
[0x0A] = { "SHA256", 32},
|
||||
};
|
||||
#endif
|
||||
|
||||
/* Decode the Stream Header field (the first 12 bytes of the .xz Stream). */
|
||||
static enum xz_ret dec_stream_header(struct xz_dec *s)
|
||||
{
|
||||
|
|
@ -393,17 +447,27 @@ static enum xz_ret dec_stream_header(struct xz_dec *s)
|
|||
return XZ_FORMAT_ERROR;
|
||||
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
uint8_t crc32_context[GRUB_MD_CRC32->contextsize];
|
||||
if (s->crc32)
|
||||
{
|
||||
uint64_t hash_context[(s->crc32->contextsize + 7) / 8];
|
||||
uint8_t resulthash[s->crc32->mdlen];
|
||||
uint8_t readhash[4];
|
||||
|
||||
GRUB_MD_CRC32->init(crc32_context);
|
||||
GRUB_MD_CRC32->write(crc32_context,s->temp.buf + HEADER_MAGIC_SIZE, 2);
|
||||
GRUB_MD_CRC32->final(crc32_context);
|
||||
s->crc32->init(hash_context);
|
||||
s->crc32->write(hash_context,s->temp.buf + HEADER_MAGIC_SIZE, 2);
|
||||
s->crc32->final(hash_context);
|
||||
|
||||
uint32_t resultcrc = get_unaligned_be32(GRUB_MD_CRC32->read(crc32_context));
|
||||
uint32_t readcrc = get_unaligned_le32(s->temp.buf + HEADER_MAGIC_SIZE + 2);
|
||||
grub_memcpy (resulthash, s->crc32->read(hash_context),
|
||||
s->crc32->mdlen);
|
||||
readhash[0] = s->temp.buf[HEADER_MAGIC_SIZE + 5];
|
||||
readhash[1] = s->temp.buf[HEADER_MAGIC_SIZE + 4];
|
||||
readhash[2] = s->temp.buf[HEADER_MAGIC_SIZE + 3];
|
||||
readhash[3] = s->temp.buf[HEADER_MAGIC_SIZE + 2];
|
||||
|
||||
if(resultcrc != readcrc)
|
||||
return XZ_DATA_ERROR;
|
||||
if(4 != s->crc32->mdlen
|
||||
|| grub_memcmp (readhash, resulthash, s->crc32->mdlen) != 0)
|
||||
return XZ_DATA_ERROR;
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
|
|
@ -411,10 +475,77 @@ static enum xz_ret dec_stream_header(struct xz_dec *s)
|
|||
* only none (Check ID = 0) and CRC32 (Check ID = 1).
|
||||
*/
|
||||
if (s->temp.buf[HEADER_MAGIC_SIZE] != 0
|
||||
|| s->temp.buf[HEADER_MAGIC_SIZE + 1] > 1)
|
||||
|| s->temp.buf[HEADER_MAGIC_SIZE + 1] >= ARRAY_SIZE (hashes)
|
||||
|| (hashes[s->temp.buf[HEADER_MAGIC_SIZE + 1]].name == 0
|
||||
&& s->temp.buf[HEADER_MAGIC_SIZE + 1] != 0))
|
||||
return XZ_OPTIONS_ERROR;
|
||||
|
||||
s->has_crc32 = s->temp.buf[HEADER_MAGIC_SIZE + 1];
|
||||
s->hash_id = s->temp.buf[HEADER_MAGIC_SIZE + 1];
|
||||
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
if (s->crc32)
|
||||
{
|
||||
s->crc32_context = kmalloc(s->crc32->contextsize, GFP_KERNEL);
|
||||
if (s->crc32_context == NULL)
|
||||
return XZ_MEMLIMIT_ERROR;
|
||||
s->crc32->init(s->crc32_context);
|
||||
}
|
||||
#endif
|
||||
|
||||
if (s->temp.buf[HEADER_MAGIC_SIZE + 1])
|
||||
{
|
||||
s->hash_size = hashes[s->temp.buf[HEADER_MAGIC_SIZE + 1]].size;
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
s->hash = grub_crypto_lookup_md_by_name (hashes[s->temp.buf[HEADER_MAGIC_SIZE + 1]].name);
|
||||
if (s->hash)
|
||||
{
|
||||
if (s->hash->mdlen != s->hash_size)
|
||||
return XZ_OPTIONS_ERROR;
|
||||
s->hash_context = kmalloc(s->hash->contextsize, GFP_KERNEL);
|
||||
if (s->hash_context == NULL)
|
||||
{
|
||||
kfree(s->crc32_context);
|
||||
return XZ_MEMLIMIT_ERROR;
|
||||
}
|
||||
|
||||
s->index.hash.hash_context = kmalloc(s->hash->contextsize,
|
||||
GFP_KERNEL);
|
||||
if (s->index.hash.hash_context == NULL)
|
||||
{
|
||||
kfree(s->hash_context);
|
||||
kfree(s->crc32_context);
|
||||
return XZ_MEMLIMIT_ERROR;
|
||||
}
|
||||
|
||||
s->block.hash.hash_context = kmalloc(s->hash->contextsize, GFP_KERNEL);
|
||||
if (s->block.hash.hash_context == NULL)
|
||||
{
|
||||
kfree(s->index.hash.hash_context);
|
||||
kfree(s->hash_context);
|
||||
kfree(s->crc32_context);
|
||||
return XZ_MEMLIMIT_ERROR;
|
||||
}
|
||||
|
||||
s->hash->init(s->hash_context);
|
||||
s->hash->init(s->index.hash.hash_context);
|
||||
s->hash->init(s->block.hash.hash_context);
|
||||
}
|
||||
#else
|
||||
s->hash = 0;
|
||||
#endif
|
||||
#if 1
|
||||
if (!s->hash)
|
||||
return XZ_OPTIONS_ERROR;
|
||||
#endif
|
||||
}
|
||||
else
|
||||
{
|
||||
s->hash = 0;
|
||||
s->hash_size = 0;
|
||||
}
|
||||
|
||||
s->have_hash_value = 0;
|
||||
|
||||
|
||||
return XZ_OK;
|
||||
}
|
||||
|
|
@ -426,19 +557,30 @@ static enum xz_ret dec_stream_footer(struct xz_dec *s)
|
|||
return XZ_DATA_ERROR;
|
||||
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
uint8_t crc32_context[GRUB_MD_CRC32->contextsize];
|
||||
if (s->crc32)
|
||||
{
|
||||
uint64_t hash_context[(s->crc32->contextsize + 7) / 8];
|
||||
uint8_t resulthash[s->crc32->mdlen];
|
||||
uint8_t readhash[4];
|
||||
|
||||
GRUB_MD_CRC32->init(crc32_context);
|
||||
GRUB_MD_CRC32->write(crc32_context, s->temp.buf + 4, 6);
|
||||
GRUB_MD_CRC32->final(crc32_context);
|
||||
s->crc32->init(hash_context);
|
||||
s->crc32->write(hash_context,s->temp.buf + 4, 6);
|
||||
s->crc32->final(hash_context);
|
||||
|
||||
uint32_t resultcrc = get_unaligned_be32(GRUB_MD_CRC32->read(crc32_context));
|
||||
uint32_t readcrc = get_unaligned_le32(s->temp.buf);
|
||||
grub_memcpy (resulthash, s->crc32->read(hash_context),
|
||||
s->crc32->mdlen);
|
||||
readhash[0] = s->temp.buf[3];
|
||||
readhash[1] = s->temp.buf[2];
|
||||
readhash[2] = s->temp.buf[1];
|
||||
readhash[3] = s->temp.buf[0];
|
||||
|
||||
if(resultcrc != readcrc)
|
||||
return XZ_DATA_ERROR;
|
||||
if(4 != s->crc32->mdlen
|
||||
|| grub_memcmp (readhash, resulthash, s->crc32->mdlen) != 0)
|
||||
return XZ_DATA_ERROR;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
* Validate Backward Size. Note that we never added the size of the
|
||||
* Index CRC32 field to s->index.size, thus we use s->index.size / 4
|
||||
|
|
@ -447,7 +589,7 @@ static enum xz_ret dec_stream_footer(struct xz_dec *s)
|
|||
if ((s->index.size >> 2) != get_le32(s->temp.buf + 4))
|
||||
return XZ_DATA_ERROR;
|
||||
|
||||
if (s->temp.buf[8] != 0 || s->temp.buf[9] != s->has_crc32)
|
||||
if (s->temp.buf[8] != 0 || s->temp.buf[9] != s->hash_id)
|
||||
return XZ_DATA_ERROR;
|
||||
|
||||
/*
|
||||
|
|
@ -468,17 +610,27 @@ static enum xz_ret dec_block_header(struct xz_dec *s)
|
|||
*/
|
||||
s->temp.size -= 4;
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
uint8_t crc32_context[GRUB_MD_CRC32->contextsize];
|
||||
if (s->crc32)
|
||||
{
|
||||
uint64_t hash_context[(s->crc32->contextsize + 7) / 8];
|
||||
uint8_t resulthash[s->crc32->mdlen];
|
||||
uint8_t readhash[4];
|
||||
|
||||
GRUB_MD_CRC32->init(crc32_context);
|
||||
GRUB_MD_CRC32->write(crc32_context, s->temp.buf, s->temp.size);
|
||||
GRUB_MD_CRC32->final(crc32_context);
|
||||
s->crc32->init(hash_context);
|
||||
s->crc32->write(hash_context,s->temp.buf, s->temp.size);
|
||||
s->crc32->final(hash_context);
|
||||
|
||||
uint32_t resultcrc = get_unaligned_be32(GRUB_MD_CRC32->read(crc32_context));
|
||||
uint32_t readcrc = get_unaligned_le32(s->temp.buf + s->temp.size);
|
||||
grub_memcpy (resulthash, s->crc32->read(hash_context),
|
||||
s->crc32->mdlen);
|
||||
readhash[3] = s->temp.buf[s->temp.size];
|
||||
readhash[2] = s->temp.buf[s->temp.size + 1];
|
||||
readhash[1] = s->temp.buf[s->temp.size + 2];
|
||||
readhash[0] = s->temp.buf[s->temp.size + 3];
|
||||
|
||||
if (resultcrc != readcrc)
|
||||
return XZ_DATA_ERROR;
|
||||
if(4 != s->crc32->mdlen
|
||||
|| grub_memcmp (readhash, resulthash, s->crc32->mdlen) != 0)
|
||||
return XZ_DATA_ERROR;
|
||||
}
|
||||
#endif
|
||||
|
||||
s->temp.pos = 2;
|
||||
|
|
@ -659,11 +811,9 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
|
|||
s->sequence = SEQ_BLOCK_CHECK;
|
||||
|
||||
case SEQ_BLOCK_CHECK:
|
||||
if (s->has_crc32) {
|
||||
ret = crc32_validate(s, b);
|
||||
if (ret != XZ_STREAM_END)
|
||||
return ret;
|
||||
}
|
||||
ret = hash_validate(s, b, 0);
|
||||
if (ret != XZ_STREAM_END)
|
||||
return ret;
|
||||
|
||||
s->sequence = SEQ_BLOCK_START;
|
||||
break;
|
||||
|
|
@ -691,24 +841,31 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
|
|||
index_update(s, b);
|
||||
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
/* Compare the hashes to validate the Index field. */
|
||||
GRUB_MD_CRC32->final(s->block.hash.crc32_context);
|
||||
GRUB_MD_CRC32->final(s->index.hash.crc32_context);
|
||||
uint32_t block_crc = *(uint32_t*)GRUB_MD_CRC32->read(s->block.hash.crc32_context);
|
||||
uint32_t index_crc = *(uint32_t*)GRUB_MD_CRC32->read(s->index.hash.crc32_context);
|
||||
|
||||
if (s->block.hash.unpadded != s->index.hash.unpadded
|
||||
|| s->block.hash.uncompressed != s->index.hash.uncompressed
|
||||
|| block_crc != index_crc)
|
||||
if (s->hash)
|
||||
{
|
||||
return XZ_DATA_ERROR;
|
||||
uint8_t block_hash[s->hash->mdlen];
|
||||
uint8_t index_hash[s->hash->mdlen];
|
||||
/* Compare the hashes to validate the Index field. */
|
||||
s->hash->final(s->block.hash.hash_context);
|
||||
s->hash->final(s->index.hash.hash_context);
|
||||
grub_memcpy (block_hash,
|
||||
s->hash->read(s->block.hash.hash_context),
|
||||
s->hash->mdlen);
|
||||
grub_memcpy (index_hash,
|
||||
s->hash->read(s->index.hash.hash_context),
|
||||
s->hash->mdlen);
|
||||
|
||||
if (s->block.hash.unpadded != s->index.hash.unpadded
|
||||
|| s->block.hash.uncompressed != s->index.hash.uncompressed
|
||||
|| grub_memcmp (block_hash, index_hash, s->hash->mdlen) != 0)
|
||||
return XZ_DATA_ERROR;
|
||||
}
|
||||
#endif
|
||||
|
||||
s->sequence = SEQ_INDEX_CRC32;
|
||||
|
||||
case SEQ_INDEX_CRC32:
|
||||
ret = crc32_validate(s, b);
|
||||
ret = hash_validate(s, b, 1);
|
||||
if (ret != XZ_STREAM_END)
|
||||
return ret;
|
||||
|
||||
|
|
@ -802,46 +959,12 @@ struct xz_dec * xz_dec_init(uint32_t dict_max)
|
|||
return NULL;
|
||||
#endif
|
||||
|
||||
memset (s, 0, sizeof (*s));
|
||||
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
/* prepare CRC32 calculators */
|
||||
if(GRUB_MD_CRC32 == NULL)
|
||||
{
|
||||
kfree(s);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
s->crc32_context = kmalloc(GRUB_MD_CRC32->contextsize, GFP_KERNEL);
|
||||
if (s->crc32_context == NULL)
|
||||
{
|
||||
kfree(s);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
s->index.hash.crc32_context = kmalloc(GRUB_MD_CRC32->contextsize, GFP_KERNEL);
|
||||
if (s->index.hash.crc32_context == NULL)
|
||||
{
|
||||
kfree(s->crc32_context);
|
||||
kfree(s);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
s->block.hash.crc32_context = kmalloc(GRUB_MD_CRC32->contextsize, GFP_KERNEL);
|
||||
if (s->block.hash.crc32_context == NULL)
|
||||
{
|
||||
kfree(s->index.hash.crc32_context);
|
||||
kfree(s->crc32_context);
|
||||
kfree(s);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
GRUB_MD_CRC32->init(s->crc32_context);
|
||||
GRUB_MD_CRC32->init(s->index.hash.crc32_context);
|
||||
GRUB_MD_CRC32->init(s->block.hash.crc32_context);
|
||||
s->crc32 = grub_crypto_lookup_md_by_name ("CRC32");
|
||||
#endif
|
||||
|
||||
s->crc32_temp = 0;
|
||||
|
||||
s->single_call = dict_max == 0;
|
||||
|
||||
#ifdef XZ_DEC_BCJ
|
||||
|
|
@ -876,28 +999,31 @@ void xz_dec_reset(struct xz_dec *s)
|
|||
|
||||
{
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
uint8_t *t;
|
||||
t = s->block.hash.crc32_context;
|
||||
uint64_t *t;
|
||||
t = s->block.hash.hash_context;
|
||||
#endif
|
||||
memzero(&s->block, sizeof(s->block));
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
s->block.hash.crc32_context = t;
|
||||
t = s->index.hash.crc32_context;
|
||||
s->block.hash.hash_context = t;
|
||||
t = s->index.hash.hash_context;
|
||||
#endif
|
||||
memzero(&s->index, sizeof(s->index));
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
s->index.hash.crc32_context = t;
|
||||
s->index.hash.hash_context = t;
|
||||
#endif
|
||||
}
|
||||
s->temp.pos = 0;
|
||||
s->temp.size = STREAM_HEADER_SIZE;
|
||||
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
GRUB_MD_CRC32->init(s->crc32_context);
|
||||
GRUB_MD_CRC32->init(s->index.hash.crc32_context);
|
||||
GRUB_MD_CRC32->init(s->block.hash.crc32_context);
|
||||
if (s->hash)
|
||||
{
|
||||
s->hash->init(s->hash_context);
|
||||
s->hash->init(s->index.hash.hash_context);
|
||||
s->hash->init(s->block.hash.hash_context);
|
||||
}
|
||||
#endif
|
||||
s->crc32_temp = 0;
|
||||
s->have_hash_value = 0;
|
||||
}
|
||||
|
||||
void xz_dec_end(struct xz_dec *s)
|
||||
|
|
@ -905,8 +1031,9 @@ void xz_dec_end(struct xz_dec *s)
|
|||
if (s != NULL) {
|
||||
xz_dec_lzma2_end(s->lzma2);
|
||||
#ifndef GRUB_EMBED_DECOMPRESSOR
|
||||
kfree(s->index.hash.crc32_context);
|
||||
kfree(s->block.hash.crc32_context);
|
||||
kfree(s->index.hash.hash_context);
|
||||
kfree(s->block.hash.hash_context);
|
||||
kfree(s->hash_context);
|
||||
kfree(s->crc32_context);
|
||||
#endif
|
||||
#ifdef XZ_DEC_BCJ
|
||||
|
|
|
|||
|
|
@ -83,6 +83,7 @@ cryptolist.write ("AES-192: gcry_rijndael\n");
|
|||
cryptolist.write ("AES-256: gcry_rijndael\n");
|
||||
|
||||
cryptolist.write ("ADLER32: adler32\n");
|
||||
cryptolist.write ("CRC64: crc64\n");
|
||||
|
||||
for cipher_file in cipher_files:
|
||||
infile = os.path.join (cipher_dir_in, cipher_file)
|
||||
|
|
|
|||
Loading…
Reference in New Issue