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https://github.com/AsahiLinux/u-boot
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0914011310
We should not use typedefs in U-Boot. They cannot be used as forward declarations which means that header files must include the full header to access them. Drop the typedef and rename the struct to remove the _s suffix which is now not useful. This requires quite a few header-file additions. Signed-off-by: Simon Glass <sjg@chromium.org>
387 lines
7.2 KiB
C
387 lines
7.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2013 The Chromium OS Authors.
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*/
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#include <common.h>
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#include <command.h>
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#include <dm.h>
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#include <env.h>
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#include <malloc.h>
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#include <asm/unaligned.h>
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#include <linux/string.h>
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#include <tpm-common.h>
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#include "tpm-user-utils.h"
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static struct udevice *tpm_dev;
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/**
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* Print a byte string in hexdecimal format, 16-bytes per line.
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*
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* @param data byte string to be printed
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* @param count number of bytes to be printed
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*/
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void print_byte_string(u8 *data, size_t count)
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{
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int i, print_newline = 0;
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for (i = 0; i < count; i++) {
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printf(" %02x", data[i]);
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print_newline = (i % 16 == 15);
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if (print_newline)
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putc('\n');
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}
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/* Avoid duplicated newline at the end */
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if (!print_newline)
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putc('\n');
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}
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/**
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* Convert a text string of hexdecimal values into a byte string.
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*
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* @param bytes text string of hexdecimal values with no space
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* between them
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* @param data output buffer for byte string. The caller has to make
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* sure it is large enough for storing the output. If
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* NULL is passed, a large enough buffer will be allocated,
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* and the caller must free it.
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* @param count_ptr output variable for the length of byte string
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* @return pointer to output buffer
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*/
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void *parse_byte_string(char *bytes, u8 *data, size_t *count_ptr)
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{
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char byte[3];
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size_t count, length;
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int i;
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if (!bytes)
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return NULL;
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length = strlen(bytes);
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count = length / 2;
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if (!data)
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data = malloc(count);
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if (!data)
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return NULL;
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byte[2] = '\0';
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for (i = 0; i < length; i += 2) {
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byte[0] = bytes[i];
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byte[1] = bytes[i + 1];
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data[i / 2] = (u8)simple_strtoul(byte, NULL, 16);
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}
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if (count_ptr)
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*count_ptr = count;
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return data;
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}
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/**
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* report_return_code() - Report any error and return failure or success
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*
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* @param return_code TPM command return code
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* @return value of enum command_ret_t
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*/
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int report_return_code(int return_code)
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{
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if (return_code) {
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printf("Error: %d\n", return_code);
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return CMD_RET_FAILURE;
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} else {
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return CMD_RET_SUCCESS;
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}
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}
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/**
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* Return number of values defined by a type string.
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*
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* @param type_str type string
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* @return number of values of type string
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*/
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int type_string_get_num_values(const char *type_str)
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{
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return strlen(type_str);
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}
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/**
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* Return total size of values defined by a type string.
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*
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* @param type_str type string
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* @return total size of values of type string, or 0 if type string
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* contains illegal type character.
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*/
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size_t type_string_get_space_size(const char *type_str)
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{
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size_t size;
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for (size = 0; *type_str; type_str++) {
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switch (*type_str) {
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case 'b':
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size += 1;
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break;
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case 'w':
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size += 2;
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break;
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case 'd':
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size += 4;
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break;
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default:
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return 0;
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}
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}
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return size;
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}
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/**
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* Allocate a buffer large enough to hold values defined by a type
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* string. The caller has to free the buffer.
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*
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* @param type_str type string
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* @param count pointer for storing size of buffer
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* @return pointer to buffer or NULL on error
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*/
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void *type_string_alloc(const char *type_str, u32 *count)
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{
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void *data;
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size_t size;
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size = type_string_get_space_size(type_str);
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if (!size)
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return NULL;
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data = malloc(size);
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if (data)
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*count = size;
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return data;
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}
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/**
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* Pack values defined by a type string into a buffer. The buffer must have
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* large enough space.
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*
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* @param type_str type string
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* @param values text strings of values to be packed
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* @param data output buffer of values
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* @return 0 on success, non-0 on error
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*/
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int type_string_pack(const char *type_str, char * const values[],
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u8 *data)
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{
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size_t offset;
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u32 value;
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for (offset = 0; *type_str; type_str++, values++) {
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value = simple_strtoul(values[0], NULL, 0);
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switch (*type_str) {
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case 'b':
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data[offset] = value;
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offset += 1;
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break;
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case 'w':
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put_unaligned_be16(value, data + offset);
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offset += 2;
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break;
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case 'd':
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put_unaligned_be32(value, data + offset);
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offset += 4;
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break;
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default:
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return -1;
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}
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}
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return 0;
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}
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/**
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* Read values defined by a type string from a buffer, and write these values
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* to environment variables.
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*
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* @param type_str type string
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* @param data input buffer of values
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* @param vars names of environment variables
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* @return 0 on success, non-0 on error
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*/
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int type_string_write_vars(const char *type_str, u8 *data,
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char * const vars[])
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{
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size_t offset;
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u32 value;
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for (offset = 0; *type_str; type_str++, vars++) {
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switch (*type_str) {
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case 'b':
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value = data[offset];
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offset += 1;
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break;
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case 'w':
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value = get_unaligned_be16(data + offset);
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offset += 2;
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break;
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case 'd':
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value = get_unaligned_be32(data + offset);
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offset += 4;
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break;
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default:
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return -1;
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}
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if (env_set_ulong(*vars, value))
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return -1;
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}
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return 0;
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}
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static int tpm_show_device(void)
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{
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struct udevice *dev;
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char buf[80];
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int n = 0, rc;
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for_each_tpm_device(dev) {
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rc = tpm_get_desc(dev, buf, sizeof(buf));
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if (rc < 0)
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printf("device %d: can't get info\n", n);
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else
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printf("device %d: %s\n", n, buf);
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n++;
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};
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return 0;
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}
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static int tpm_set_device(unsigned long num)
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{
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struct udevice *dev;
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unsigned long n = 0;
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int rc = CMD_RET_FAILURE;
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for_each_tpm_device(dev) {
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if (n == num) {
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rc = 0;
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break;
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}
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n++;
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}
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if (!rc)
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tpm_dev = dev;
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return rc;
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}
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int get_tpm(struct udevice **devp)
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{
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int rc;
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/*
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* To keep a backward compatibility with previous code,
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* if a tpm device is not explicitly set, we set the first one.
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*/
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if (!tpm_dev) {
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rc = tpm_set_device(0);
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if (rc) {
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printf("Couldn't set TPM 0 (rc = %d)\n", rc);
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return CMD_RET_FAILURE;
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}
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}
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if (devp)
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*devp = tpm_dev;
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return 0;
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}
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int do_tpm_device(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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unsigned long num;
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int rc;
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if (argc == 2) {
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num = simple_strtoul(argv[1], NULL, 10);
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rc = tpm_set_device(num);
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if (rc)
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printf("Couldn't set TPM %lu (rc = %d)\n", num, rc);
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} else {
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rc = tpm_show_device();
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}
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return rc;
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}
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int do_tpm_info(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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struct udevice *dev;
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char buf[80];
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int rc;
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rc = get_tpm(&dev);
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if (rc)
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return rc;
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rc = tpm_get_desc(dev, buf, sizeof(buf));
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if (rc < 0) {
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printf("Couldn't get TPM info (%d)\n", rc);
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return CMD_RET_FAILURE;
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}
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printf("%s\n", buf);
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return 0;
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}
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int do_tpm_init(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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struct udevice *dev;
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int rc;
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if (argc != 1)
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return CMD_RET_USAGE;
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rc = get_tpm(&dev);
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if (rc)
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return rc;
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return report_return_code(tpm_init(dev));
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}
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int do_tpm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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struct cmd_tbl *tpm_commands, *cmd;
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struct tpm_chip_priv *priv;
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struct udevice *dev;
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unsigned int size;
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int ret;
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if (argc < 2)
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return CMD_RET_USAGE;
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ret = get_tpm(&dev);
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if (ret)
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return ret;
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priv = dev_get_uclass_priv(dev);
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/* Below getters return NULL if the desired stack is not built */
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switch (priv->version) {
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case TPM_V1:
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tpm_commands = get_tpm1_commands(&size);
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break;
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case TPM_V2:
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tpm_commands = get_tpm2_commands(&size);
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break;
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default:
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tpm_commands = NULL;
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}
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if (!tpm_commands)
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return CMD_RET_USAGE;
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cmd = find_cmd_tbl(argv[1], tpm_commands, size);
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if (!cmd)
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return CMD_RET_USAGE;
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return cmd->cmd(cmdtp, flag, argc - 1, argv + 1);
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}
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