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53ca6cfbdf
Execution of this command requires physical presence on the DUT, this
is why it is save to allow it over USB.
BRANCH=cr50, cr50-mp
BUG=chromium:812880
TEST=using modified gsctool verified that the command goes through and
physical presence indication is requested
Change-Id: I0aa371d8aaa5a480cc12d5d16edad8497142f4b4
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/927796
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
114 lines
3.0 KiB
C
114 lines
3.0 KiB
C
/* Copyright 2015 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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#include "byteorder.h"
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#include "console.h"
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#include "extension.h"
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#include "link_defs.h"
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#include "util.h"
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#define CPRINTF(format, args...) cprintf(CC_EXTENSION, format, ## args)
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static uint32_t extension_route_command(uint16_t command_code,
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void *buffer,
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size_t in_size,
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size_t *out_size)
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{
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struct extension_command *cmd_p;
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struct extension_command *end_p;
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cmd_p = (struct extension_command *)&__extension_cmds;
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end_p = (struct extension_command *)&__extension_cmds_end;
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#ifdef CONFIG_BOARD_ID_SUPPORT
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if (board_id_is_mismatched()) {
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switch (command_code) {
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case EXTENSION_FW_UPGRADE:
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case VENDOR_CC_REPORT_TPM_STATE:
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case VENDOR_CC_TURN_UPDATE_ON:
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case EXTENSION_POST_RESET:
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break;
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default:
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CPRINTF("%s: ignoring command 0x%x "
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"due to board ID mismatch\n",
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__func__, command_code);
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return VENDOR_RC_NO_SUCH_COMMAND;
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}
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}
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#endif
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while (cmd_p != end_p) {
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if (cmd_p->command_code == command_code)
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return cmd_p->handler(command_code, buffer,
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in_size, out_size);
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cmd_p++;
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}
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CPRINTF("%s: handler %d not found\n", __func__, command_code);
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/* This covers the case of the handler not found. */
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*out_size = 0;
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return VENDOR_RC_NO_SUCH_COMMAND;
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}
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void usb_extension_route_command(uint16_t command_code,
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void *buffer,
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size_t in_size,
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size_t *out_size)
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{
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uint32_t rv;
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uint8_t *buf = buffer; /* Cache it for easy pointer arithmetics. */
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size_t buf_size;
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switch (command_code) {
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#ifdef CR50_DEV
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case VENDOR_CC_IMMEDIATE_RESET:
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case VENDOR_CC_INVALIDATE_INACTIVE_RW:
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case VENDOR_CC_SET_BOARD_ID:
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#endif /* defined(CR50_DEV) */
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case EXTENSION_POST_RESET: /* Always need to be able to reset. */
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case VENDOR_CC_GET_BOARD_ID:
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case VENDOR_CC_SPI_HASH: /* This will require physical presence. */
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case VENDOR_CC_TURN_UPDATE_ON:
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/*
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* The return code normally put into the TPM response header
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* is not present in the USB response. Vendor command return
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* code is guaranteed to fit in a byte. Let's keep space for
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* it in the front of the buffer.
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*/
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buf_size = *out_size - 1;
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rv = extension_route_command(command_code, buffer,
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in_size, &buf_size);
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/*
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* Copy actual response, if any, one byte up, to free room for
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* the return code.
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*/
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if (buf_size)
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memmove(buf + 1, buf, buf_size);
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*out_size = buf_size + 1;
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break;
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default:
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/* Otherwise, we don't allow this command. */
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CPRINTF("%s: ignoring vendor cmd %d\n", __func__, command_code);
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*out_size = 1;
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rv = VENDOR_RC_NO_SUCH_COMMAND;
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break;
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}
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buf[0] = rv; /* We care about LSB only. */
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}
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uint32_t tpm_extension_route_command(uint16_t command_code,
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void *buffer,
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size_t in_size,
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size_t *out_size)
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{
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/*
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* TODO(aaboagye): Determine what commands (if any) should be filtered.
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*/
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return extension_route_command(command_code, buffer, in_size, out_size);
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}
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