mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
411 lines
8.9 KiB
C
411 lines
8.9 KiB
C
// SPDX-License-Identifier: MIT
|
|
/*
|
|
* Copyright (C) 2016 The Android Open Source Project
|
|
*/
|
|
|
|
#include "avb_util.h"
|
|
|
|
#include <stdarg.h>
|
|
|
|
uint32_t avb_be32toh(uint32_t in) {
|
|
uint8_t* d = (uint8_t*)∈
|
|
uint32_t ret;
|
|
ret = ((uint32_t)d[0]) << 24;
|
|
ret |= ((uint32_t)d[1]) << 16;
|
|
ret |= ((uint32_t)d[2]) << 8;
|
|
ret |= ((uint32_t)d[3]);
|
|
return ret;
|
|
}
|
|
|
|
uint64_t avb_be64toh(uint64_t in) {
|
|
uint8_t* d = (uint8_t*)∈
|
|
uint64_t ret;
|
|
ret = ((uint64_t)d[0]) << 56;
|
|
ret |= ((uint64_t)d[1]) << 48;
|
|
ret |= ((uint64_t)d[2]) << 40;
|
|
ret |= ((uint64_t)d[3]) << 32;
|
|
ret |= ((uint64_t)d[4]) << 24;
|
|
ret |= ((uint64_t)d[5]) << 16;
|
|
ret |= ((uint64_t)d[6]) << 8;
|
|
ret |= ((uint64_t)d[7]);
|
|
return ret;
|
|
}
|
|
|
|
/* Converts a 32-bit unsigned integer from host to big-endian byte order. */
|
|
uint32_t avb_htobe32(uint32_t in) {
|
|
union {
|
|
uint32_t word;
|
|
uint8_t bytes[4];
|
|
} ret;
|
|
ret.bytes[0] = (in >> 24) & 0xff;
|
|
ret.bytes[1] = (in >> 16) & 0xff;
|
|
ret.bytes[2] = (in >> 8) & 0xff;
|
|
ret.bytes[3] = in & 0xff;
|
|
return ret.word;
|
|
}
|
|
|
|
/* Converts a 64-bit unsigned integer from host to big-endian byte order. */
|
|
uint64_t avb_htobe64(uint64_t in) {
|
|
union {
|
|
uint64_t word;
|
|
uint8_t bytes[8];
|
|
} ret;
|
|
ret.bytes[0] = (in >> 56) & 0xff;
|
|
ret.bytes[1] = (in >> 48) & 0xff;
|
|
ret.bytes[2] = (in >> 40) & 0xff;
|
|
ret.bytes[3] = (in >> 32) & 0xff;
|
|
ret.bytes[4] = (in >> 24) & 0xff;
|
|
ret.bytes[5] = (in >> 16) & 0xff;
|
|
ret.bytes[6] = (in >> 8) & 0xff;
|
|
ret.bytes[7] = in & 0xff;
|
|
return ret.word;
|
|
}
|
|
|
|
int avb_safe_memcmp(const void* s1, const void* s2, size_t n) {
|
|
const unsigned char* us1 = s1;
|
|
const unsigned char* us2 = s2;
|
|
int result = 0;
|
|
|
|
if (0 == n) {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Code snippet without data-dependent branch due to Nate Lawson
|
|
* (nate@root.org) of Root Labs.
|
|
*/
|
|
while (n--) {
|
|
result |= *us1++ ^ *us2++;
|
|
}
|
|
|
|
return result != 0;
|
|
}
|
|
|
|
bool avb_safe_add_to(uint64_t* value, uint64_t value_to_add) {
|
|
uint64_t original_value;
|
|
|
|
avb_assert(value != NULL);
|
|
|
|
original_value = *value;
|
|
|
|
*value += value_to_add;
|
|
if (*value < original_value) {
|
|
avb_error("Overflow when adding values.\n");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool avb_safe_add(uint64_t* out_result, uint64_t a, uint64_t b) {
|
|
uint64_t dummy;
|
|
if (out_result == NULL) {
|
|
out_result = &dummy;
|
|
}
|
|
*out_result = a;
|
|
return avb_safe_add_to(out_result, b);
|
|
}
|
|
|
|
bool avb_validate_utf8(const uint8_t* data, size_t num_bytes) {
|
|
size_t n;
|
|
unsigned int num_cc;
|
|
|
|
for (n = 0, num_cc = 0; n < num_bytes; n++) {
|
|
uint8_t c = data[n];
|
|
|
|
if (num_cc > 0) {
|
|
if ((c & (0x80 | 0x40)) == 0x80) {
|
|
/* 10xx xxxx */
|
|
} else {
|
|
goto fail;
|
|
}
|
|
num_cc--;
|
|
} else {
|
|
if (c < 0x80) {
|
|
num_cc = 0;
|
|
} else if ((c & (0x80 | 0x40 | 0x20)) == (0x80 | 0x40)) {
|
|
/* 110x xxxx */
|
|
num_cc = 1;
|
|
} else if ((c & (0x80 | 0x40 | 0x20 | 0x10)) == (0x80 | 0x40 | 0x20)) {
|
|
/* 1110 xxxx */
|
|
num_cc = 2;
|
|
} else if ((c & (0x80 | 0x40 | 0x20 | 0x10 | 0x08)) ==
|
|
(0x80 | 0x40 | 0x20 | 0x10)) {
|
|
/* 1111 0xxx */
|
|
num_cc = 3;
|
|
} else {
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (num_cc != 0) {
|
|
goto fail;
|
|
}
|
|
|
|
return true;
|
|
|
|
fail:
|
|
return false;
|
|
}
|
|
|
|
bool avb_str_concat(char* buf,
|
|
size_t buf_size,
|
|
const char* str1,
|
|
size_t str1_len,
|
|
const char* str2,
|
|
size_t str2_len) {
|
|
uint64_t combined_len;
|
|
|
|
if (!avb_safe_add(&combined_len, str1_len, str2_len)) {
|
|
avb_error("Overflow when adding string sizes.\n");
|
|
return false;
|
|
}
|
|
|
|
if (combined_len > buf_size - 1) {
|
|
avb_error("Insufficient buffer space.\n");
|
|
return false;
|
|
}
|
|
|
|
avb_memcpy(buf, str1, str1_len);
|
|
avb_memcpy(buf + str1_len, str2, str2_len);
|
|
buf[combined_len] = '\0';
|
|
|
|
return true;
|
|
}
|
|
|
|
void* avb_malloc(size_t size) {
|
|
void* ret = avb_malloc_(size);
|
|
if (ret == NULL) {
|
|
avb_error("Failed to allocate memory.\n");
|
|
return NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void* avb_calloc(size_t size) {
|
|
void* ret = avb_malloc(size);
|
|
if (ret == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
avb_memset(ret, '\0', size);
|
|
return ret;
|
|
}
|
|
|
|
char* avb_strdup(const char* str) {
|
|
size_t len = avb_strlen(str);
|
|
char* ret = avb_malloc(len + 1);
|
|
if (ret == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
avb_memcpy(ret, str, len);
|
|
ret[len] = '\0';
|
|
|
|
return ret;
|
|
}
|
|
|
|
const char* avb_strstr(const char* haystack, const char* needle) {
|
|
size_t n, m;
|
|
|
|
/* Look through |haystack| and check if the first character of
|
|
* |needle| matches. If so, check the rest of |needle|.
|
|
*/
|
|
for (n = 0; haystack[n] != '\0'; n++) {
|
|
if (haystack[n] != needle[0]) {
|
|
continue;
|
|
}
|
|
|
|
for (m = 1;; m++) {
|
|
if (needle[m] == '\0') {
|
|
return haystack + n;
|
|
}
|
|
|
|
if (haystack[n + m] != needle[m]) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
const char* avb_strv_find_str(const char* const* strings,
|
|
const char* str,
|
|
size_t str_size) {
|
|
size_t n;
|
|
for (n = 0; strings[n] != NULL; n++) {
|
|
if (avb_strlen(strings[n]) == str_size &&
|
|
avb_memcmp(strings[n], str, str_size) == 0) {
|
|
return strings[n];
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
char* avb_replace(const char* str, const char* search, const char* replace) {
|
|
char* ret = NULL;
|
|
size_t ret_len = 0;
|
|
size_t search_len, replace_len;
|
|
const char* str_after_last_replace;
|
|
|
|
search_len = avb_strlen(search);
|
|
replace_len = avb_strlen(replace);
|
|
|
|
str_after_last_replace = str;
|
|
while (*str != '\0') {
|
|
const char* s;
|
|
size_t num_before;
|
|
size_t num_new;
|
|
|
|
s = avb_strstr(str, search);
|
|
if (s == NULL) {
|
|
break;
|
|
}
|
|
|
|
num_before = s - str;
|
|
|
|
if (ret == NULL) {
|
|
num_new = num_before + replace_len + 1;
|
|
ret = avb_malloc(num_new);
|
|
if (ret == NULL) {
|
|
goto out;
|
|
}
|
|
avb_memcpy(ret, str, num_before);
|
|
avb_memcpy(ret + num_before, replace, replace_len);
|
|
ret[num_new - 1] = '\0';
|
|
ret_len = num_new - 1;
|
|
} else {
|
|
char* new_str;
|
|
num_new = ret_len + num_before + replace_len + 1;
|
|
new_str = avb_malloc(num_new);
|
|
if (new_str == NULL) {
|
|
goto out;
|
|
}
|
|
avb_memcpy(new_str, ret, ret_len);
|
|
avb_memcpy(new_str + ret_len, str, num_before);
|
|
avb_memcpy(new_str + ret_len + num_before, replace, replace_len);
|
|
new_str[num_new - 1] = '\0';
|
|
avb_free(ret);
|
|
ret = new_str;
|
|
ret_len = num_new - 1;
|
|
}
|
|
|
|
str = s + search_len;
|
|
str_after_last_replace = str;
|
|
}
|
|
|
|
if (ret == NULL) {
|
|
ret = avb_strdup(str_after_last_replace);
|
|
if (ret == NULL) {
|
|
goto out;
|
|
}
|
|
} else {
|
|
size_t num_remaining = avb_strlen(str_after_last_replace);
|
|
size_t num_new = ret_len + num_remaining + 1;
|
|
char* new_str = avb_malloc(num_new);
|
|
if (new_str == NULL) {
|
|
goto out;
|
|
}
|
|
avb_memcpy(new_str, ret, ret_len);
|
|
avb_memcpy(new_str + ret_len, str_after_last_replace, num_remaining);
|
|
new_str[num_new - 1] = '\0';
|
|
avb_free(ret);
|
|
ret = new_str;
|
|
ret_len = num_new - 1;
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/* We only support a limited amount of strings in avb_strdupv(). */
|
|
#define AVB_STRDUPV_MAX_NUM_STRINGS 32
|
|
|
|
char* avb_strdupv(const char* str, ...) {
|
|
va_list ap;
|
|
const char* strings[AVB_STRDUPV_MAX_NUM_STRINGS];
|
|
size_t lengths[AVB_STRDUPV_MAX_NUM_STRINGS];
|
|
size_t num_strings, n;
|
|
uint64_t total_length;
|
|
char *ret = NULL, *dest;
|
|
|
|
num_strings = 0;
|
|
total_length = 0;
|
|
va_start(ap, str);
|
|
do {
|
|
size_t str_len = avb_strlen(str);
|
|
strings[num_strings] = str;
|
|
lengths[num_strings] = str_len;
|
|
if (!avb_safe_add_to(&total_length, str_len)) {
|
|
avb_fatal("Overflow while determining total length.\n");
|
|
break;
|
|
}
|
|
num_strings++;
|
|
if (num_strings == AVB_STRDUPV_MAX_NUM_STRINGS) {
|
|
avb_fatal("Too many strings passed.\n");
|
|
break;
|
|
}
|
|
str = va_arg(ap, const char*);
|
|
} while (str != NULL);
|
|
va_end(ap);
|
|
|
|
ret = avb_malloc(total_length + 1);
|
|
if (ret == NULL) {
|
|
goto out;
|
|
}
|
|
|
|
dest = ret;
|
|
for (n = 0; n < num_strings; n++) {
|
|
avb_memcpy(dest, strings[n], lengths[n]);
|
|
dest += lengths[n];
|
|
}
|
|
*dest = '\0';
|
|
avb_assert(dest == ret + total_length);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
const char* avb_basename(const char* str) {
|
|
int64_t n;
|
|
size_t len;
|
|
|
|
len = avb_strlen(str);
|
|
if (len >= 2) {
|
|
for (n = len - 2; n >= 0; n--) {
|
|
if (str[n] == '/') {
|
|
return str + n + 1;
|
|
}
|
|
}
|
|
}
|
|
return str;
|
|
}
|
|
|
|
void avb_uppercase(char* str) {
|
|
size_t i;
|
|
for (i = 0; str[i] != '\0'; ++i) {
|
|
if (str[i] <= 0x7A && str[i] >= 0x61) {
|
|
str[i] -= 0x20;
|
|
}
|
|
}
|
|
}
|
|
|
|
char* avb_bin2hex(const uint8_t* data, size_t data_len) {
|
|
const char hex_digits[17] = "0123456789abcdef";
|
|
char* hex_data;
|
|
size_t n;
|
|
|
|
hex_data = avb_malloc(data_len * 2 + 1);
|
|
if (hex_data == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
for (n = 0; n < data_len; n++) {
|
|
hex_data[n * 2] = hex_digits[data[n] >> 4];
|
|
hex_data[n * 2 + 1] = hex_digits[data[n] & 0x0f];
|
|
}
|
|
hex_data[n * 2] = '\0';
|
|
return hex_data;
|
|
}
|