diff options
Diffstat (limited to 'firmware/2lib/2secdata.c')
-rw-r--r-- | firmware/2lib/2secdata.c | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/firmware/2lib/2secdata.c b/firmware/2lib/2secdata.c deleted file mode 100644 index 4493fbf3..00000000 --- a/firmware/2lib/2secdata.c +++ /dev/null @@ -1,131 +0,0 @@ -/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - * - * Secure storage APIs - */ - -#include "2sysincludes.h" -#include "2common.h" -#include "2crc8.h" -#include "2misc.h" -#include "2secdata.h" - -vb2_error_t vb2api_secdata_check(struct vb2_context *ctx) -{ - struct vb2_secdata *sec = (struct vb2_secdata *)ctx->secdata; - - /* Verify CRC */ - if (sec->crc8 != vb2_crc8(sec, offsetof(struct vb2_secdata, crc8))) { - VB2_DEBUG("secdata_firmware: bad CRC\n"); - return VB2_ERROR_SECDATA_CRC; - } - - /* Verify version */ - if (sec->struct_version < VB2_SECDATA_VERSION) { - VB2_DEBUG("secdata_firmware: version incompatible\n"); - return VB2_ERROR_SECDATA_VERSION; - } - - return VB2_SUCCESS; -} - -vb2_error_t vb2api_secdata_create(struct vb2_context *ctx) -{ - struct vb2_secdata *sec = (struct vb2_secdata *)ctx->secdata; - - /* Clear the entire struct */ - memset(sec, 0, sizeof(*sec)); - - /* Set to current version */ - sec->struct_version = VB2_SECDATA_VERSION; - - /* Calculate initial CRC */ - sec->crc8 = vb2_crc8(sec, offsetof(struct vb2_secdata, crc8)); - ctx->flags |= VB2_CONTEXT_SECDATA_CHANGED; - return VB2_SUCCESS; -} - -vb2_error_t vb2_secdata_init(struct vb2_context *ctx) -{ - struct vb2_shared_data *sd = vb2_get_sd(ctx); - vb2_error_t rv; - - rv = vb2api_secdata_check(ctx); - if (rv) - return rv; - - /* Set status flag */ - sd->status |= VB2_SD_STATUS_SECDATA_INIT; - - /* Read this now to make sure crossystem has it even in rec mode. */ - rv = vb2_secdata_get(ctx, VB2_SECDATA_VERSIONS, - &sd->fw_version_secdata); - if (rv) - return rv; - - return VB2_SUCCESS; -} - -vb2_error_t vb2_secdata_get(struct vb2_context *ctx, - enum vb2_secdata_param param, uint32_t *dest) -{ - struct vb2_shared_data *sd = vb2_get_sd(ctx); - struct vb2_secdata *sec = (struct vb2_secdata *)ctx->secdata; - - if (!(sd->status & VB2_SD_STATUS_SECDATA_INIT)) - return VB2_ERROR_SECDATA_GET_UNINITIALIZED; - - switch(param) { - case VB2_SECDATA_FLAGS: - *dest = sec->flags; - return VB2_SUCCESS; - - case VB2_SECDATA_VERSIONS: - *dest = sec->fw_versions; - return VB2_SUCCESS; - - default: - return VB2_ERROR_SECDATA_GET_PARAM; - } -} - -vb2_error_t vb2_secdata_set(struct vb2_context *ctx, - enum vb2_secdata_param param, uint32_t value) -{ - struct vb2_secdata *sec = (struct vb2_secdata *)ctx->secdata; - uint32_t now; - - if (!(vb2_get_sd(ctx)->status & VB2_SD_STATUS_SECDATA_INIT)) - return VB2_ERROR_SECDATA_SET_UNINITIALIZED; - - /* If not changing the value, don't regenerate the CRC. */ - if (vb2_secdata_get(ctx, param, &now) == VB2_SUCCESS && now == value) - return VB2_SUCCESS; - - switch(param) { - case VB2_SECDATA_FLAGS: - /* Make sure flags is in valid range */ - if (value > 0xff) - return VB2_ERROR_SECDATA_SET_FLAGS; - - VB2_DEBUG("secdata flags updated from 0x%x to 0x%x\n", - sec->flags, value); - sec->flags = value; - break; - - case VB2_SECDATA_VERSIONS: - VB2_DEBUG("secdata versions updated from 0x%x to 0x%x\n", - sec->fw_versions, value); - sec->fw_versions = value; - break; - - default: - return VB2_ERROR_SECDATA_SET_PARAM; - } - - /* Regenerate CRC */ - sec->crc8 = vb2_crc8(sec, offsetof(struct vb2_secdata, crc8)); - ctx->flags |= VB2_CONTEXT_SECDATA_CHANGED; - return VB2_SUCCESS; -} |