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
6 changed files with 387 additions and 114 deletions
28
ChangeLog
28
ChangeLog
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@ -1,3 +1,31 @@
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2011-11-03 Vladimir Serbinenko <phcoder@gmail.com>
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XZ CRC64 and SHA256 support.
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* Makefile.util.def (libgrubmods): Add crc64.c.
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* grub-core/Makefile.core.def (crc64): New module.
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* grub-core/lib/crc64.c: New file.
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* grub-core/lib/xzembed/xz_dec_stream.c (xz_dec_hash)
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[!GRUB_EMBED_DECOMPRESSOR]: Rename crc32_context to hash_context.
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Fix the type.
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(MAX_HASH_SIZE): New define.
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(xz_dec) [!GRUB_EMBED_DECOMPRESSOR]: Add generic hash fields.
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(dec_block) [!GRUB_EMBED_DECOMPRESSOR]: Handle non-crc32 hashes.
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(index_update) [!GRUB_EMBED_DECOMPRESSOR]: Likewise.
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(dec_index) [!GRUB_EMBED_DECOMPRESSOR]: Likewise.
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(crc32_validate) [!GRUB_EMBED_DECOMPRESSOR]: Rename to ...
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(hash_validate) [!GRUB_EMBED_DECOMPRESSOR]: ... this.
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Handle non-crc32 hashes.
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(hashes) [!GRUB_EMBED_DECOMPRESSOR]: New variable.
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(dec_stream_header): Handle non-crc32 hashes.
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(dec_stream_footer): Likewise.
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(dec_block_header): Likewise.
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(dec_main): Likewise.
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(xz_dec_init): Likewise.
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(xz_dec_reset): Likewise.
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(xz_dec_end): Likewise.
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* util/import_gcry.py: Add CRC64 line.
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2011-11-03 Vladimir Serbinenko <phcoder@gmail.com>
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* grub-core/fs/ufs.c (grub_ufs_mtime) [MODE_UFS2]: Check mtime field
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@ -93,6 +93,7 @@ library = {
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common = grub-core/lib/LzmaEnc.c;
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common = grub-core/lib/crc.c;
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common = grub-core/lib/adler32.c;
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common = grub-core/lib/crc64.c;
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common = grub-core/normal/datetime.c;
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common = grub-core/normal/misc.c;
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common = grub-core/partmap/acorn.c;
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@ -1698,3 +1698,8 @@ module = {
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name = adler32;
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common = lib/adler32.c;
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};
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module = {
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name = crc64;
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common = lib/crc64.c;
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};
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111
grub-core/lib/crc64.c
Normal file
111
grub-core/lib/crc64.c
Normal file
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@ -0,0 +1,111 @@
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/* crc64.c - crc64 function */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008,2011 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/types.h>
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#include <grub/dl.h>
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#include <grub/crypto.h>
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static grub_uint64_t crc64_table [256];
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static void
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init_crc64_table (void)
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{
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auto grub_uint64_t reflect (grub_uint64_t ref, int len);
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grub_uint64_t reflect (grub_uint64_t ref, int len)
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{
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grub_uint64_t result = 0;
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int i;
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for (i = 1; i <= len; i++)
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{
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if (ref & 1)
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result |= 1ULL << (len - i);
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ref >>= 1;
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}
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return result;
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}
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grub_uint64_t polynomial = 0x42f0e1eba9ea3693ULL;
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int i, j;
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for(i = 0; i < 256; i++)
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{
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crc64_table[i] = reflect(i, 8) << 56;
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for (j = 0; j < 8; j++)
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{
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crc64_table[i] = (crc64_table[i] << 1) ^
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(crc64_table[i] & (1ULL << 63) ? polynomial : 0);
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}
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crc64_table[i] = reflect(crc64_table[i], 64);
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}
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}
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static void
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crc64_init (void *context)
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{
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if (! crc64_table[1])
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init_crc64_table ();
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*(grub_uint64_t *) context = 0;
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}
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static void
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crc64_write (void *context, const void *buf, grub_size_t size)
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{
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unsigned i;
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const grub_uint8_t *data = buf;
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grub_uint64_t crc = ~grub_le_to_cpu64 (*(grub_uint64_t *) context);
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for (i = 0; i < size; i++)
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{
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crc = (crc >> 8) ^ crc64_table[(crc & 0xFF) ^ *data];
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data++;
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}
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*(grub_uint64_t *) context = grub_cpu_to_le64 (~crc);
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}
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static grub_uint8_t *
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crc64_read (void *context)
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{
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return context;
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}
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static void
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crc64_final (void *context __attribute__ ((unused)))
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{
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}
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gcry_md_spec_t _gcry_digest_spec_crc64 =
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{
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"CRC64", 0, 0, 0, 8,
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crc64_init, crc64_write, crc64_final, crc64_read,
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sizeof (grub_uint64_t),
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.blocksize = 64
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};
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GRUB_MOD_INIT(crc64)
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{
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grub_md_register (&_gcry_digest_spec_crc64);
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}
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GRUB_MOD_FINI(crc64)
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{
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grub_md_unregister (&_gcry_digest_spec_crc64);
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}
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@ -32,10 +32,13 @@ struct xz_dec_hash {
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vli_type unpadded;
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vli_type uncompressed;
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#ifndef GRUB_EMBED_DECOMPRESSOR
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uint8_t *crc32_context;
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uint64_t *hash_context;
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#endif
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};
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/* Enough for up to 512 bits. */
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#define MAX_HASH_SIZE 64
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struct xz_dec {
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/* Position in dec_main() */
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enum {
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@ -62,11 +65,22 @@ struct xz_dec {
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size_t out_start;
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/* CRC32 value in Block or Index */
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uint32_t crc32_temp; /* need for crc32_validate*/
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uint8_t *crc32_context;
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#ifndef GRUB_EMBED_DECOMPRESSOR
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uint8_t hash_value[MAX_HASH_SIZE]; /* need for crc32_validate*/
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#endif
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int have_hash_value;
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#ifndef GRUB_EMBED_DECOMPRESSOR
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uint64_t *hash_context;
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uint64_t *crc32_context;
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#endif
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/* True if CRC32 is calculated from uncompressed data */
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bool has_crc32;
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/* Hash function calculated from uncompressed data */
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#ifndef GRUB_EMBED_DECOMPRESSOR
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const gcry_md_spec_t *hash;
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const gcry_md_spec_t *crc32;
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#endif
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grub_size_t hash_size;
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grub_uint8_t hash_id;
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/* True if we are operating in single-call mode. */
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bool single_call;
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@ -250,9 +264,12 @@ static enum xz_ret dec_block(struct xz_dec *s, struct xz_buf *b)
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return XZ_DATA_ERROR;
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#ifndef GRUB_EMBED_DECOMPRESSOR
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if (s->has_crc32)
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GRUB_MD_CRC32->write(s->crc32_context,b->out + s->out_start,
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b->out_pos - s->out_start);
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if (s->hash)
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s->hash->write(s->hash_context,b->out + s->out_start,
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b->out_pos - s->out_start);
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if (s->crc32)
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s->crc32->write(s->crc32_context,b->out + s->out_start,
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b->out_pos - s->out_start);
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#endif
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if (ret == XZ_STREAM_END) {
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@ -268,14 +285,15 @@ static enum xz_ret dec_block(struct xz_dec *s, struct xz_buf *b)
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s->block.hash.unpadded += s->block_header.size
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+ s->block.compressed;
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if (s->has_crc32)
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s->block.hash.unpadded += 4;
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s->block.hash.unpadded += s->hash_size;
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s->block.hash.uncompressed += s->block.uncompressed;
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#ifndef GRUB_EMBED_DECOMPRESSOR
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GRUB_MD_CRC32->write(s->block.hash.crc32_context,
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(const uint8_t *)&s->block.hash, 2 * sizeof(vli_type));
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if (s->hash)
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s->hash->write(s->block.hash.hash_context,
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(const uint8_t *)&s->block.hash,
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2 * sizeof(vli_type));
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#endif
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++s->block.count;
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@ -290,7 +308,10 @@ static void index_update(struct xz_dec *s, const struct xz_buf *b)
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size_t in_used = b->in_pos - s->in_start;
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s->index.size += in_used;
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#ifndef GRUB_EMBED_DECOMPRESSOR
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GRUB_MD_CRC32->write(s->crc32_context,b->in + s->in_start, in_used);
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if (s->hash)
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s->hash->write(s->hash_context,b->in + s->in_start, in_used);
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if (s->crc32)
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s->crc32->write(s->crc32_context,b->in + s->in_start, in_used);
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#endif
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}
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@ -337,8 +358,9 @@ static enum xz_ret dec_index(struct xz_dec *s, struct xz_buf *b)
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s->index.hash.uncompressed += s->vli;
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#ifndef GRUB_EMBED_DECOMPRESSOR
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GRUB_MD_CRC32->write(s->index.hash.crc32_context,
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(const uint8_t *)&s->index.hash, 2 * sizeof(vli_type));
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if (s->hash)
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s->hash->write(s->index.hash.hash_context,
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(const uint8_t *)&s->index.hash, 2 * sizeof(vli_type));
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#endif
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--s->index.count;
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@ -354,13 +376,30 @@ static enum xz_ret dec_index(struct xz_dec *s, struct xz_buf *b)
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* Validate that the next four input bytes match the value of s->crc32.
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* s->pos must be zero when starting to validate the first byte.
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*/
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static enum xz_ret crc32_validate(struct xz_dec *s, struct xz_buf *b)
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static enum xz_ret hash_validate(struct xz_dec *s, struct xz_buf *b,
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int crc32)
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{
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#ifndef GRUB_EMBED_DECOMPRESSOR
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if(s->crc32_temp == 0)
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const gcry_md_spec_t *hash = crc32 ? s->crc32 : s->hash;
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grub_uint64_t *hash_context = crc32 ? s->crc32_context
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: s->hash_context;
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if(!s->have_hash_value && hash
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&& sizeof (s->hash_value) >= hash->mdlen)
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{
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GRUB_MD_CRC32->final(s->crc32_context);
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s->crc32_temp = get_unaligned_be32(GRUB_MD_CRC32->read(s->crc32_context));
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hash->final(hash_context);
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grub_memcpy (s->hash_value, hash->read(hash_context),
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hash->mdlen);
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s->have_hash_value = 1;
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if (s->hash_id == 1 || crc32)
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{
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grub_uint8_t t;
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t = s->hash_value[0];
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s->hash_value[0] = s->hash_value[3];
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s->hash_value[3] = t;
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t = s->hash_value[1];
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s->hash_value[1] = s->hash_value[2];
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s->hash_value[2] = t;
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}
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}
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#endif
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@ -369,23 +408,38 @@ static enum xz_ret crc32_validate(struct xz_dec *s, struct xz_buf *b)
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return XZ_OK;
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#ifndef GRUB_EMBED_DECOMPRESSOR
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if (((s->crc32_temp >> s->pos) & 0xFF) != b->in[b->in_pos++])
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if (hash && s->hash_value[s->pos / 8] != b->in[b->in_pos++])
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return XZ_DATA_ERROR;
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#endif
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s->pos += 8;
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} while (s->pos < 32);
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} while (s->pos < (crc32 ? 32 : s->hash_size * 8));
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#ifndef GRUB_EMBED_DECOMPRESSOR
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GRUB_MD_CRC32->init(s->crc32_context);
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if (s->hash)
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s->hash->init(s->hash_context);
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if (s->crc32)
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s->crc32->init(s->crc32_context);
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#endif
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s->crc32_temp = 0;
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s->have_hash_value = 0;
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s->pos = 0;
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return XZ_STREAM_END;
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}
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#ifndef GRUB_EMBED_DECOMPRESSOR
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static struct
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{
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const char *name;
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grub_size_t size;
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} hashes[] = {
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[0x01] = { "CRC32", 4},
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[0x04] = { "CRC64", 8},
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[0x0A] = { "SHA256", 32},
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};
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#endif
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/* Decode the Stream Header field (the first 12 bytes of the .xz Stream). */
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static enum xz_ret dec_stream_header(struct xz_dec *s)
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{
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@ -393,17 +447,27 @@ static enum xz_ret dec_stream_header(struct xz_dec *s)
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return XZ_FORMAT_ERROR;
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#ifndef GRUB_EMBED_DECOMPRESSOR
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uint8_t crc32_context[GRUB_MD_CRC32->contextsize];
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if (s->crc32)
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{
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uint64_t hash_context[(s->crc32->contextsize + 7) / 8];
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uint8_t resulthash[s->crc32->mdlen];
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uint8_t readhash[4];
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GRUB_MD_CRC32->init(crc32_context);
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GRUB_MD_CRC32->write(crc32_context,s->temp.buf + HEADER_MAGIC_SIZE, 2);
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GRUB_MD_CRC32->final(crc32_context);
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s->crc32->init(hash_context);
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s->crc32->write(hash_context,s->temp.buf + HEADER_MAGIC_SIZE, 2);
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s->crc32->final(hash_context);
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uint32_t resultcrc = get_unaligned_be32(GRUB_MD_CRC32->read(crc32_context));
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uint32_t readcrc = get_unaligned_le32(s->temp.buf + HEADER_MAGIC_SIZE + 2);
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grub_memcpy (resulthash, s->crc32->read(hash_context),
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s->crc32->mdlen);
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readhash[0] = s->temp.buf[HEADER_MAGIC_SIZE + 5];
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readhash[1] = s->temp.buf[HEADER_MAGIC_SIZE + 4];
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readhash[2] = s->temp.buf[HEADER_MAGIC_SIZE + 3];
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readhash[3] = s->temp.buf[HEADER_MAGIC_SIZE + 2];
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if(resultcrc != readcrc)
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return XZ_DATA_ERROR;
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if(4 != s->crc32->mdlen
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|| grub_memcmp (readhash, resulthash, s->crc32->mdlen) != 0)
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return XZ_DATA_ERROR;
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}
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#endif
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/*
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@ -411,10 +475,77 @@ static enum xz_ret dec_stream_header(struct xz_dec *s)
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* only none (Check ID = 0) and CRC32 (Check ID = 1).
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*/
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if (s->temp.buf[HEADER_MAGIC_SIZE] != 0
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|| s->temp.buf[HEADER_MAGIC_SIZE + 1] > 1)
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|| s->temp.buf[HEADER_MAGIC_SIZE + 1] >= ARRAY_SIZE (hashes)
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|| (hashes[s->temp.buf[HEADER_MAGIC_SIZE + 1]].name == 0
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&& s->temp.buf[HEADER_MAGIC_SIZE + 1] != 0))
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return XZ_OPTIONS_ERROR;
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s->has_crc32 = s->temp.buf[HEADER_MAGIC_SIZE + 1];
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s->hash_id = s->temp.buf[HEADER_MAGIC_SIZE + 1];
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#ifndef GRUB_EMBED_DECOMPRESSOR
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||||
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 a new issue