44 lines
888 B
C
44 lines
888 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2020 Linaro Limited
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*/
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#include <common.h>
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#include <efi_api.h>
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#include <efi_loader.h>
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#include <env.h>
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#include <fdtdec.h>
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#include <asm/global_data.h>
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DECLARE_GLOBAL_DATA_PTR;
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int efi_get_public_key_data(void **pkey, efi_uintn_t *pkey_len)
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{
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const void *fdt_blob = gd->fdt_blob;
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const void *blob;
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const char *cnode_name = "capsule-key";
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const char *snode_name = "signature";
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int sig_node;
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int len;
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sig_node = fdt_subnode_offset(fdt_blob, 0, snode_name);
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if (sig_node < 0) {
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EFI_PRINT("Unable to get signature node offset\n");
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return -FDT_ERR_NOTFOUND;
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}
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blob = fdt_getprop(fdt_blob, sig_node, cnode_name, &len);
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if (!blob || len < 0) {
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EFI_PRINT("Unable to get capsule-key value\n");
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*pkey = NULL;
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*pkey_len = 0;
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return -FDT_ERR_NOTFOUND;
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}
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*pkey = (void *)blob;
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*pkey_len = len;
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return 0;
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}
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