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6f1b82ac14
This is part 4 of a series of changes to rearrange the vboot2 library
so that it's possible to start using the new-style data structs. This
change moves knowledge of the old vboot1 data structs into lib20; 2lib
now contains only code which is common to both vboot2.x libraries
(that is, code which is data structure version agnostic).
No functional changes; just rearranging code and tests.
BUG=chromium:423882
BRANCH=none
TEST=make runtests && VBOOT2=1 make runtests (works with/withoug VBOOT2 flag)
And compile firmware for veyron_pinky
CQ-DEPEND=CL:233051
Change-Id: I8f9e67157575e5be14952ef4809c3dfafd92596d
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/233021
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
123 lines
2.8 KiB
C
123 lines
2.8 KiB
C
/* Copyright (c) 2014 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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* Externally-callable APIs
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* (Firmware portion)
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*/
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#include "2sysincludes.h"
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#include "2api.h"
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#include "2common.h"
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#include "2misc.h"
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#include "2nvstorage.h"
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#include "2secdata.h"
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#include "2sha.h"
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#include "2rsa.h"
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int vb2api_secdata_check(const struct vb2_context *ctx)
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{
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return vb2_secdata_check_crc(ctx);
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}
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int vb2api_secdata_create(struct vb2_context *ctx)
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{
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return vb2_secdata_create(ctx);
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}
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void vb2api_fail(struct vb2_context *ctx, uint8_t reason, uint8_t subcode)
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{
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/* Initialize the vboot context if it hasn't been yet */
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vb2_init_context(ctx);
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vb2_fail(ctx, reason, subcode);
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}
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int vb2api_fw_phase1(struct vb2_context *ctx)
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{
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int rv;
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/* Initialize the vboot context if it hasn't been yet */
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vb2_init_context(ctx);
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/* Initialize NV context */
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vb2_nv_init(ctx);
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/* Initialize secure data */
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rv = vb2_secdata_init(ctx);
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if (rv)
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vb2_fail(ctx, VB2_RECOVERY_SECDATA_INIT, rv);
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/* Load and parse the GBB header */
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rv = vb2_fw_parse_gbb(ctx);
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if (rv)
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vb2_fail(ctx, VB2_RECOVERY_GBB_HEADER, rv);
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/* Check for dev switch */
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rv = vb2_check_dev_switch(ctx);
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if (rv)
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vb2_fail(ctx, VB2_RECOVERY_DEV_SWITCH, rv);
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/*
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* Check for recovery. Note that this function returns void, since
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* any errors result in requesting recovery.
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*/
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vb2_check_recovery(ctx);
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/* Return error if recovery is needed */
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if (ctx->flags & VB2_CONTEXT_RECOVERY_MODE) {
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/* Always clear RAM when entering recovery mode */
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ctx->flags |= VB2_CONTEXT_CLEAR_RAM;
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return VB2_ERROR_API_PHASE1_RECOVERY;
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}
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return VB2_SUCCESS;
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}
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int vb2api_fw_phase2(struct vb2_context *ctx)
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{
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int rv;
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/* Always clear RAM when entering developer mode */
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if (ctx->flags & VB2_CONTEXT_DEVELOPER_MODE)
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ctx->flags |= VB2_CONTEXT_CLEAR_RAM;
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/* Check for explicit request to clear TPM */
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rv = vb2_check_tpm_clear(ctx);
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if (rv) {
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vb2_fail(ctx, VB2_RECOVERY_TPM_CLEAR_OWNER, rv);
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return rv;
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}
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/* Decide which firmware slot to try this boot */
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rv = vb2_select_fw_slot(ctx);
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if (rv) {
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vb2_fail(ctx, VB2_RECOVERY_FW_SLOT, rv);
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return rv;
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}
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return VB2_SUCCESS;
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}
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int vb2api_extend_hash(struct vb2_context *ctx,
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const void *buf,
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uint32_t size)
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{
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struct vb2_shared_data *sd = vb2_get_sd(ctx);
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struct vb2_digest_context *dc = (struct vb2_digest_context *)
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(ctx->workbuf + sd->workbuf_hash_offset);
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/* Must have initialized hash digest work area */
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if (!sd->workbuf_hash_size)
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return VB2_ERROR_API_EXTEND_HASH_WORKBUF;
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/* Don't extend past the data we expect to hash */
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if (!size || size > sd->hash_remaining_size)
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return VB2_ERROR_API_EXTEND_HASH_SIZE;
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sd->hash_remaining_size -= size;
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return vb2_digest_extend(dc, buf, size);
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}
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