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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2020 Linaro Limited
*/
#include <common.h>
#include <efi_api.h>
#include <efi_loader.h>
#include <env.h>
#include <fdtdec.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
int 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) {
EFI_PRINT("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) {
EFI_PRINT("Unable to get capsule-key value\n");
*pkey = NULL;
*pkey_len = 0;
return -FDT_ERR_NOTFOUND;
}
*pkey = (void *)blob;
*pkey_len = len;
return 0;
}
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