於 日，2013-08-25 於 18:43 +0200，Pavel Machek 提到： > On Thu 2013-08-22 19:01:56, Lee, Chun-Yi wrote: > > This patch introduced SNAPSHOT_SIG_HASH config for user to select which > > hash algorithm will be used during signature generation of snapshot. > > > > v2: > > Add define check of oCONFIG_SNAPSHOT_VERIFICATION in snapshot.c before > > declare pkey_hash(). > > > > Reviewed-by: Jiri Kosina <jkos...@suse.cz> > > Signed-off-by: Lee, Chun-Yi <j...@suse.com> > > --- > > kernel/power/Kconfig | 46 > > ++++++++++++++++++++++++++++++++++++++++++++++ > > kernel/power/snapshot.c | 27 ++++++++++++++++++++++----- > > 2 files changed, 68 insertions(+), 5 deletions(-) > > > > diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig > > index b592d88..79b34fa 100644 > > --- a/kernel/power/Kconfig > > +++ b/kernel/power/Kconfig > > @@ -78,6 +78,52 @@ config SNAPSHOT_VERIFICATION > > dependent on UEFI environment. EFI bootloader should generate the > > key-pair. > > > > +choice > > + prompt "Which hash algorithm should snapshot be signed with?" > > + depends on SNAPSHOT_VERIFICATION > > + help > > + This determines which sort of hashing algorithm will be used > > during > > + signature generation of snapshot. This algorithm _must_ be built > > into > > + the kernel directly so that signature verification can take place. > > + It is not possible to load a signed snapshot containing the algorithm > > + to check the signature on that module. > > Like if 1000 ifdefs you already added to the code are not enough, you > make some new ones? > Pavel >
This SNAPSHOT_SIG_HASH kernel config is to select which SHA algorithms used for generate digest of snapshot. The configuration will captured by a const char* in code: +static const char *snapshot_hash = CONFIG_SNAPSHOT_SIG_HASH; + +static int pkey_hash(void) So, there doesn't have any ifdef block derived from this new config. Thanks a lot! Joey Lee -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
