The commit 47a25e81d35c ("Revert "efi_capsule: Move signature from DTB to .rodata"") failed to revert the removal of efi_get_public_key_data().
Add back this function and move it under lib/efi_loader so that other platforms can utilize it. It is now declared as a weak function so that it can be replaced with a platform-specific implementation.
Fixes: 47a25e81d35c ("Revert "efi_capsule: Move signature from DTB to .rodata"") Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org --- lib/efi_loader/efi_capsule.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+)
diff --git a/lib/efi_loader/efi_capsule.c b/lib/efi_loader/efi_capsule.c index b75e4bcba1a9..44f5da61a9be 100644 --- a/lib/efi_loader/efi_capsule.c +++ b/lib/efi_loader/efi_capsule.c @@ -11,15 +11,20 @@ #include <common.h> #include <efi_loader.h> #include <efi_variable.h> +#include <env.h> +#include <fdtdec.h> #include <fs.h> #include <malloc.h> #include <mapmem.h> #include <sort.h> +#include <asm/global_data.h>
#include <crypto/pkcs7.h> #include <crypto/pkcs7_parser.h> #include <linux/err.h>
+DECLARE_GLOBAL_DATA_PTR; + const efi_guid_t efi_guid_capsule_report = EFI_CAPSULE_REPORT_GUID; static const efi_guid_t efi_guid_firmware_management_capsule_id = EFI_FIRMWARE_MANAGEMENT_CAPSULE_ID_GUID; @@ -251,6 +256,37 @@ out: }
#if defined(CONFIG_EFI_CAPSULE_AUTHENTICATE) +int __weak efi_get_public_key_data(void **pkey, efi_uintn_t *pkey_len) +{ + const void *fdt_blob = gd->fdt_blob; + const void *blob; + const char *cnode_name = "capsule-key"; + const char *snode_name = "signature"; + int sig_node; + int len; + + sig_node = fdt_subnode_offset(fdt_blob, 0, snode_name); + if (sig_node < 0) { + log_err("Unable to get signature node offset\n"); + + return -FDT_ERR_NOTFOUND; + } + + blob = fdt_getprop(fdt_blob, sig_node, cnode_name, &len); + + if (!blob || len < 0) { + log_err("Unable to get capsule-key value\n"); + *pkey = NULL; + *pkey_len = 0; + + return -FDT_ERR_NOTFOUND; + } + + *pkey = (void *)blob; + *pkey_len = len; + + return 0; +}
efi_status_t efi_capsule_authenticate(const void *capsule, efi_uintn_t capsule_size, void **image, efi_uintn_t *image_size)