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kexec, KEYS: make the code in bzImage64_verify_sig generic

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commit 278311e417 ("kexec, KEYS: Make use of platform keyring for
signature verify") adds platform keyring support on x86 kexec but not
arm64.

The code in bzImage64_verify_sig uses the keys on the
.builtin_trusted_keys, .machine, if configured and enabled,
.secondary_trusted_keys, also if configured, and .platform keyrings
to verify the signed kernel image as PE file.

Cc: kexec@lists.infradead.org
Cc: keyrings@vger.kernel.org
Cc: linux-security-module@vger.kernel.org
Reviewed-by: Michal Suchanek <msuchanek@suse.de>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
This commit is contained in:
Coiby Xu
2022-07-14 21:40:25 +08:00
committed by Mimi Zohar
parent 689a71493b
commit c903dae894
3 changed files with 25 additions and 19 deletions
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17
kernel/kexec_file.c
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@@ -123,6 +123,23 @@ void kimage_file_post_load_cleanup(struct kimage *image)
}
#ifdef CONFIG_KEXEC_SIG
#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION
int kexec_kernel_verify_pe_sig(const char *kernel, unsigned long kernel_len)
{
int ret;
ret = verify_pefile_signature(kernel, kernel_len,
VERIFY_USE_SECONDARY_KEYRING,
VERIFYING_KEXEC_PE_SIGNATURE);
if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) {
ret = verify_pefile_signature(kernel, kernel_len,
VERIFY_USE_PLATFORM_KEYRING,
VERIFYING_KEXEC_PE_SIGNATURE);
}
return ret;
}
#endif
static int kexec_image_verify_sig(struct kimage *image, void *buf,
unsigned long buf_len)
{