/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* High-level firmware API for loading and verifying rewritable firmware.
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* (Firmware portion)
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*/
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#include "sysincludes.h"
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#include "bmpblk_header.h"
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#include "region.h"
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#include "gbb_access.h"
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#include "gbb_header.h"
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#include "load_kernel_fw.h"
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#include "utility.h"
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#include "vboot_api.h"
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#include "vboot_struct.h"
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static VbError_t VbGbbReadKey(VbCommonParams *cparams, uint32_t offset,
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VbPublicKey **keyp)
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{
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VbPublicKey hdr, *key;
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VbError_t ret;
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uint32_t size;
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ret = VbRegionReadData(cparams, VB_REGION_GBB, offset,
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sizeof(VbPublicKey), &hdr);
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if (ret)
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return ret;
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/* Deal with a zero-size key (used in testing) */
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size = hdr.key_offset + hdr.key_size;
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if (size < sizeof(hdr))
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size = sizeof(hdr);
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key = VbExMalloc(size);
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ret = VbRegionReadData(cparams, VB_REGION_GBB, offset, size, key);
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if (ret) {
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VbExFree(key);
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return ret;
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}
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*keyp = key;
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return VBERROR_SUCCESS;
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}
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VbError_t VbGbbReadRootKey(VbCommonParams *cparams, VbPublicKey **keyp)
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{
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return VbGbbReadKey(cparams, cparams->gbb->rootkey_offset, keyp);
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}
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VbError_t VbGbbReadRecoveryKey(VbCommonParams *cparams, VbPublicKey **keyp)
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{
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return VbGbbReadKey(cparams, cparams->gbb->recovery_key_offset, keyp);
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}
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