Gary Lin
a122e02623
lib/pbkdf2: Optimize PBKDF2 by reusing HMAC handle
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The previous PBKDF2 implementation used grub_crypto_hmac_buffer() which
allocates and frees an HMAC handle on every call. This approach caused
significant performance overhead slowing down the boot process considerably.
This commit refactors the PBKDF2 code to use the new HMAC functions
allowing the HMAC handle and its buffers to be allocated once and reused
across multiple operations. This change significantly reduces disk
unlocking time.
In a QEMU/OVMF test environment this patch reduced the time to unlock
a LUKS2 (*) partition from approximately 15 seconds to 4 seconds.
(*) PBKDF2 SHA256 with 3454944 iterations.
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2025-10-23 19:14:59 +02:00
Colin Watson
47e67d809c
Remove pragmas related to -Wunreachable-code
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-Wunreachable-code has been a no-op since GCC 4.5; GRUB hasn't been
compiled with it since 2012; and GCC 6 produces "error:
'-Wunreachable-code' is not an option that controls warnings" for these.
Fixes Debian bug #812047 .
2016-01-20 15:56:55 +00:00
Vladimir Serbinenko
065ed900d4
grub-core/lib/pbkdf2.c (grub_crypto_pbkdf2): Check that hash len is not 0.
2015-01-21 17:42:12 +01:00
Vladimir Serbinenko
9c6482b8d6
* grub-core/lib/pbkdf2.c: Remove variable length arrays.
2013-11-12 01:52:55 +01:00
Vladimir 'phcoder' Serbinenko
84f9d341b0
* grub-core/fs/affs.c (grub_affs_read_block): Avoid <= in loop
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condition to avoid possibly infinite loops.
* grub-core/lib/pbkdf2.c (grub_crypto_pbkdf2): Likewise.
* grub-core/lib/xzembed/xz_dec_bcj.c (bcj_powerpc): Likewise.
2012-02-22 05:22:39 +01:00
Vladimir 'phcoder' Serbinenko
ebcecdf1c3
Increase warning level.
...
* conf/Makefile.common (CFLAGS_GNULIB): Add -Wno-redundant-decls
-Wno-unreachable-code -Wno-conversion -Wno-old-style-definition.
* configure.ac (HOST_CFLAGS): Add bunch of -W arguments.
(TARGET_CFLAGS): Likewise.
(HOST_CFLAGS): Add -Werror unless --disable-werror is activated.
* grub-core/Makefile.core.def (decompressor_xz): Add
-Wno-unreachable-code.
(normal): Add -Wno-redundant-decls.
(xzio): Add -Wno-unreachable-code.
(lzopio): Add -Wno-redundant-decls -Wno-error.
* grub-core/commands/acpi.c: Add exception to -Wcast-align.
* grub-core/commands/lsacpi.c: Add exception to -Wcast-align.
* grub-core/gensymlist.sh: Add exception to -Wmissing-format-attribute.
* grub-core/kern/dl.c: Add exception to -Wcast-align.
* grub-core/kern/efi/efi.c (grub_efi_modules_addr): Likewise.
* grub-core/kern/i386/coreboot/init.c: Add exception to
-Wsuggest-attribute=noreturn.
* grub-core/kern/ia64/dl.c: Add exception to -Wcast-align.
* grub-core/kern/ia64/dl_helper.c: Likewise.
* grub-core/kern/mips/dl.c: Likewise.
* grub-core/kern/sparc64/dl.c: Likewise.
* grub-core/lib/LzmaEnc.c: Add exception to -Wshadow.
* grub-core/lib/libgcrypt_wrap/cipher_wrap.h (memcpy): Likewise.
(memcmp): Likewise.
* grub-core/lib/pbkdf2.c: Add exception to -Wunreachable-code.
* grub-core/loader/ia64/efi/linux.c: Add exception to -Wcast-align.
* grub-core/loader/mips/linux.c: Likewise.
* grub-core/loader/multiboot_elfxx.c: Likewise.
* grub-core/script/parser.y: Add exception to -Wunreachable-code.
* grub-core/video/sm712.c: Add exception to -Wcast-align.
* util/import_gcry.py: Add -Wno-cast-align to modules checked by hand.
* grub-core/font/font.c (grub_font_loader_init): Add explicit cast and
fixme.
* grub-core/fs/iso9660.c (grub_iso9660_iterate_dir): Likewise.
* grub-core/kern/i386/multiboot_mmap.c (grub_machine_mmap_init):
Fix prototype.
2012-02-10 16:48:48 +01:00
Vladimir 'phcoder' Serbinenko
e745cf0ca6
Implement automatic module license checking according to new GNU
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guidelines.
* grub-core/kern/dl.c (grub_dl_check_license): New function.
(grub_dl_load_core): Use grub_dl_check_license.
* include/grub/dl.h (GRUB_MOD_SECTION): New macro.
(GRUB_MOD_LICENSE): Likewise.
(GRUB_MOD_DUAL_LICENSE): Likewise.
All modules updated.
2011-04-11 23:01:51 +02:00
BVK Chaitanya
8c41176882
automake commit without merge history
2010-05-06 11:34:04 +05:30
