mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-26 01:18:28 +00:00
279 lines
7.2 KiB
C
279 lines
7.2 KiB
C
/**
|
|
* Copyright (c) 2012-2014 Luke Dashjr
|
|
* Copyright (c) 2013-2014 Pavol Rusnak
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
|
|
* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include <stdbool.h>
|
|
#include <sys/types.h>
|
|
#include "base58.h"
|
|
#include "sha2.h"
|
|
#include "macros.h"
|
|
#include "ripemd160.h"
|
|
|
|
static const int8_t b58digits_map[] = {
|
|
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
|
|
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
|
|
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
|
|
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8,-1,-1,-1,-1,-1,-1,
|
|
-1, 9,10,11,12,13,14,15,16,-1,17,18,19,20,21,-1,
|
|
22,23,24,25,26,27,28,29,30,31,32,-1,-1,-1,-1,-1,
|
|
-1,33,34,35,36,37,38,39,40,41,42,43,-1,44,45,46,
|
|
47,48,49,50,51,52,53,54,55,56,57,-1,-1,-1,-1,-1,
|
|
};
|
|
|
|
bool b58tobin(void *bin, size_t *binszp, const char *b58)
|
|
{
|
|
size_t binsz = *binszp;
|
|
const unsigned char *b58u = (const unsigned char*)b58;
|
|
unsigned char *binu = bin;
|
|
size_t outisz = (binsz + 3) / 4;
|
|
uint32_t outi[outisz];
|
|
uint64_t t;
|
|
uint32_t c;
|
|
size_t i, j;
|
|
uint8_t bytesleft = binsz % 4;
|
|
uint32_t zeromask = bytesleft ? (0xffffffff << (bytesleft * 8)) : 0;
|
|
unsigned zerocount = 0;
|
|
size_t b58sz;
|
|
|
|
b58sz = strlen(b58);
|
|
|
|
memset(outi, 0, outisz * sizeof(*outi));
|
|
|
|
// Leading zeros, just count
|
|
for (i = 0; i < b58sz && b58u[i] == '1'; ++i)
|
|
++zerocount;
|
|
|
|
for ( ; i < b58sz; ++i)
|
|
{
|
|
if (b58u[i] & 0x80)
|
|
// High-bit set on invalid digit
|
|
return false;
|
|
if (b58digits_map[b58u[i]] == -1)
|
|
// Invalid base58 digit
|
|
return false;
|
|
c = (unsigned)b58digits_map[b58u[i]];
|
|
for (j = outisz; j--; )
|
|
{
|
|
t = ((uint64_t)outi[j]) * 58 + c;
|
|
c = (t & 0x3f00000000) >> 32;
|
|
outi[j] = t & 0xffffffff;
|
|
}
|
|
if (c)
|
|
// Output number too big (carry to the next int32)
|
|
return false;
|
|
if (outi[0] & zeromask)
|
|
// Output number too big (last int32 filled too far)
|
|
return false;
|
|
}
|
|
|
|
j = 0;
|
|
switch (bytesleft) {
|
|
case 3:
|
|
*(binu++) = (outi[0] & 0xff0000) >> 16;
|
|
//-fallthrough
|
|
case 2:
|
|
*(binu++) = (outi[0] & 0xff00) >> 8;
|
|
//-fallthrough
|
|
case 1:
|
|
*(binu++) = (outi[0] & 0xff);
|
|
++j;
|
|
//-fallthrough
|
|
default:
|
|
break;
|
|
}
|
|
|
|
for (; j < outisz; ++j)
|
|
{
|
|
*(binu++) = (outi[j] >> 0x18) & 0xff;
|
|
*(binu++) = (outi[j] >> 0x10) & 0xff;
|
|
*(binu++) = (outi[j] >> 8) & 0xff;
|
|
*(binu++) = (outi[j] >> 0) & 0xff;
|
|
}
|
|
|
|
// Count canonical base58 byte count
|
|
binu = bin;
|
|
for (i = 0; i < binsz; ++i)
|
|
{
|
|
if (binu[i])
|
|
break;
|
|
--*binszp;
|
|
}
|
|
*binszp += zerocount;
|
|
|
|
return true;
|
|
}
|
|
|
|
int b58check(const void *bin, size_t binsz, HasherType hasher_type, const char *base58str)
|
|
{
|
|
unsigned char buf[32];
|
|
const uint8_t *binc = bin;
|
|
unsigned i;
|
|
if (binsz < 4)
|
|
return -4;
|
|
hasher_Raw(hasher_type, bin, binsz - 4, buf);
|
|
hasher_Raw(hasher_type, buf, 32, buf);
|
|
if (memcmp(&binc[binsz - 4], buf, 4))
|
|
return -1;
|
|
|
|
// Check number of zeros is correct AFTER verifying checksum (to avoid possibility of accessing base58str beyond the end)
|
|
for (i = 0; binc[i] == '\0' && base58str[i] == '1'; ++i)
|
|
{} // Just finding the end of zeros, nothing to do in loop
|
|
if (binc[i] == '\0' || base58str[i] == '1')
|
|
return -3;
|
|
|
|
return binc[0];
|
|
}
|
|
|
|
static const char b58digits_ordered[] = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
|
|
|
|
bool b58enc(char *b58, size_t *b58sz, const void *data, size_t binsz)
|
|
{
|
|
const uint8_t *bin = data;
|
|
int carry;
|
|
ssize_t i, j, high, zcount = 0;
|
|
size_t size;
|
|
|
|
while (zcount < (ssize_t)binsz && !bin[zcount])
|
|
++zcount;
|
|
|
|
size = (binsz - zcount) * 138 / 100 + 1;
|
|
uint8_t buf[size];
|
|
memset(buf, 0, size);
|
|
|
|
for (i = zcount, high = size - 1; i < (ssize_t)binsz; ++i, high = j)
|
|
{
|
|
for (carry = bin[i], j = size - 1; (j > high) || carry; --j)
|
|
{
|
|
carry += 256 * buf[j];
|
|
buf[j] = carry % 58;
|
|
carry /= 58;
|
|
}
|
|
}
|
|
|
|
for (j = 0; j < (ssize_t)size && !buf[j]; ++j);
|
|
|
|
if (*b58sz <= zcount + size - j)
|
|
{
|
|
*b58sz = zcount + size - j + 1;
|
|
return false;
|
|
}
|
|
|
|
if (zcount)
|
|
memset(b58, '1', zcount);
|
|
for (i = zcount; j < (ssize_t)size; ++i, ++j)
|
|
b58[i] = b58digits_ordered[buf[j]];
|
|
b58[i] = '\0';
|
|
*b58sz = i + 1;
|
|
|
|
return true;
|
|
}
|
|
|
|
int base58_encode_check(const uint8_t *data, int datalen, HasherType hasher_type, char *str, int strsize)
|
|
{
|
|
if (datalen > 128) {
|
|
return 0;
|
|
}
|
|
uint8_t buf[datalen + 32];
|
|
uint8_t *hash = buf + datalen;
|
|
memcpy(buf, data, datalen);
|
|
hasher_Raw(hasher_type, data, datalen, hash);
|
|
hasher_Raw(hasher_type, hash, 32, hash);
|
|
size_t res = strsize;
|
|
bool success = b58enc(str, &res, buf, datalen + 4);
|
|
MEMSET_BZERO(buf, sizeof(buf));
|
|
return success ? res : 0;
|
|
}
|
|
|
|
int base58_decode_check(const char *str, HasherType hasher_type, uint8_t *data, int datalen)
|
|
{
|
|
if (datalen > 128) {
|
|
return 0;
|
|
}
|
|
uint8_t d[datalen + 4];
|
|
size_t res = datalen + 4;
|
|
if (b58tobin(d, &res, str) != true) {
|
|
return 0;
|
|
}
|
|
uint8_t *nd = d + datalen + 4 - res;
|
|
if (b58check(nd, res, hasher_type, str) < 0) {
|
|
return 0;
|
|
}
|
|
memcpy(data, nd, res - 4);
|
|
return res - 4;
|
|
}
|
|
|
|
#if USE_GRAPHENE
|
|
int b58gphcheck(const void *bin, size_t binsz, const char *base58str)
|
|
{
|
|
unsigned char buf[32];
|
|
const uint8_t *binc = bin;
|
|
unsigned i;
|
|
if (binsz < 4)
|
|
return -4;
|
|
ripemd160(bin, binsz - 4, buf); // No double SHA256, but a single RIPEMD160
|
|
if (memcmp(&binc[binsz - 4], buf, 4))
|
|
return -1;
|
|
|
|
// Check number of zeros is correct AFTER verifying checksum (to avoid possibility of accessing base58str beyond the end)
|
|
for (i = 0; binc[i] == '\0' && base58str[i] == '1'; ++i)
|
|
{} // Just finding the end of zeros, nothing to do in loop
|
|
if (binc[i] == '\0' || base58str[i] == '1')
|
|
return -3;
|
|
|
|
return binc[0];
|
|
}
|
|
|
|
int base58gph_encode_check(const uint8_t *data, int datalen, char *str, int strsize)
|
|
{
|
|
if (datalen > 128) {
|
|
return 0;
|
|
}
|
|
uint8_t buf[datalen + 32];
|
|
uint8_t *hash = buf + datalen;
|
|
memcpy(buf, data, datalen);
|
|
ripemd160(data, datalen, hash); // No double SHA256, but a single RIPEMD160
|
|
size_t res = strsize;
|
|
bool success = b58enc(str, &res, buf, datalen + 4);
|
|
MEMSET_BZERO(buf, sizeof(buf));
|
|
return success ? res : 0;
|
|
}
|
|
|
|
int base58gph_decode_check(const char *str, uint8_t *data, int datalen)
|
|
{
|
|
if (datalen > 128) {
|
|
return 0;
|
|
}
|
|
uint8_t d[datalen + 4];
|
|
size_t res = datalen + 4;
|
|
if (b58tobin(d, &res, str) != true) {
|
|
return 0;
|
|
}
|
|
uint8_t *nd = d + datalen + 4 - res;
|
|
if (b58gphcheck(nd, res, str) < 0) {
|
|
return 0;
|
|
}
|
|
memcpy(data, nd, res - 4);
|
|
return res - 4;
|
|
}
|
|
#endif
|