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b9be53640e
Error codes reported by the crypto and storage APIs are now very specific, and tests verify the proper errors are reported. More specific error codes coming to other files next, but I don't want this CL to get too long. This also changes test_common.c so TEST_EQ() reports mismatched values in both decimal and hex, and adds TEST_SUCC() to test for a successful return value. BUG=chromium:370082 BRANCH=none TEST=make clean && VBOOT2=1 COV=1 make Change-Id: I255c8e5769284fbc286b9d94631b19677a71cdd0 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/202778 Reviewed-by: Bill Richardson <wfrichar@chromium.org>
116 lines
2.6 KiB
C
116 lines
2.6 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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* Secure storage APIs
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*/
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#include "2sysincludes.h"
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#include "2common.h"
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#include "2crc8.h"
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#include "2misc.h"
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#include "2secdata.h"
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int vb2_secdata_check_crc(const struct vb2_context *ctx)
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{
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const struct vb2_secdata *sec =
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(const struct vb2_secdata *)ctx->secdata;
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/* Verify CRC */
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if (sec->crc8 != vb2_crc8(sec, offsetof(struct vb2_secdata, crc8)))
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return VB2_ERROR_SECDATA_CRC;
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return VB2_SUCCESS;
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}
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int vb2_secdata_create(struct vb2_context *ctx)
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{
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struct vb2_secdata *sec = (struct vb2_secdata *)ctx->secdata;
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/* Clear the entire struct */
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memset(sec, 0, sizeof(*sec));
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/* Set to current version */
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sec->struct_version = VB2_SECDATA_VERSION;
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/* Calculate initial CRC */
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sec->crc8 = vb2_crc8(sec, offsetof(struct vb2_secdata, crc8));
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ctx->flags |= VB2_CONTEXT_SECDATA_CHANGED;
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return VB2_SUCCESS;
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}
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int vb2_secdata_init(struct vb2_context *ctx)
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{
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struct vb2_shared_data *sd = vb2_get_sd(ctx);
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struct vb2_secdata *sec = (struct vb2_secdata *)ctx->secdata;
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int rv;
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/* Data must be new enough to have a CRC */
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if (sec->struct_version < 2)
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return VB2_ERROR_SECDATA_VERSION;
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rv = vb2_secdata_check_crc(ctx);
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if (rv)
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return rv;
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/* Set status flag */
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sd->status |= VB2_SD_STATUS_SECDATA_INIT;
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// TODO: unit test for that
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return VB2_SUCCESS;
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}
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int vb2_secdata_get(struct vb2_context *ctx,
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enum vb2_secdata_param param,
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uint32_t *dest)
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{
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struct vb2_secdata *sec = (struct vb2_secdata *)ctx->secdata;
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switch(param) {
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case VB2_SECDATA_FLAGS:
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*dest = sec->flags;
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return VB2_SUCCESS;
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case VB2_SECDATA_VERSIONS:
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*dest = sec->fw_versions;
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return VB2_SUCCESS;
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default:
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return VB2_ERROR_SECDATA_GET_PARAM;
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}
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}
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int vb2_secdata_set(struct vb2_context *ctx,
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enum vb2_secdata_param param,
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uint32_t value)
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{
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struct vb2_secdata *sec = (struct vb2_secdata *)ctx->secdata;
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uint32_t now;
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/* If not changing the value, don't regenerate the CRC. */
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if (vb2_secdata_get(ctx, param, &now) == VB2_SUCCESS && now == value)
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return VB2_SUCCESS;
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switch(param) {
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case VB2_SECDATA_FLAGS:
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/* Make sure flags is in valid range */
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if (value > 0xff)
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return VB2_ERROR_SECDATA_SET_FLAGS;
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sec->flags = value;
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break;
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case VB2_SECDATA_VERSIONS:
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sec->fw_versions = value;
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break;
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default:
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return VB2_ERROR_SECDATA_SET_PARAM;
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}
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/* Regenerate CRC */
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sec->crc8 = vb2_crc8(sec, offsetof(struct vb2_secdata, crc8));
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ctx->flags |= VB2_CONTEXT_SECDATA_CHANGED;
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return VB2_SUCCESS;
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}
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