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don't use native base58

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pull/25/head
Pavol Rusnak 8 years ago
parent b29ece66ef
commit 3d3d8e89a5
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GPG Key ID: 91F3B339B9A02A3D
6 changed files with 65 additions and 278 deletions
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161
extmod/modtrezorcrypto/base58.c
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@ -1,161 +0,0 @@
/**
* 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 <sys/types.h>
#include "base58.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 = (void*)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 && !b58digits_map[b58u[i]]; ++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;
case 2:
*(binu++) = (outi[0] & 0xff00) >> 8;
case 1:
*(binu++) = (outi[0] & 0xff);
++j;
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;
}
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;
}

33
extmod/modtrezorcrypto/base58.h
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/**
* Copyright (c) 2013-2014 Tomas Dzetkulic
* 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.
*/
#ifndef __BASE58_H__
#define __BASE58_H__
#include <stdint.h>
#include <stdbool.h>
bool b58tobin(void *bin, size_t *binszp, const char *b58);
bool b58enc(char *b58, size_t *b58sz, const void *data, size_t binsz);
#endif

65
extmod/modtrezorcrypto/modtrezorcrypto-base58.h
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/*
* Copyright (c) Pavol Rusnak, SatoshiLabs
*
* Licensed under Microsoft Reference Source License (Ms-RSL)
* see LICENSE.md file for details
*/
#include "base58.h"
// class Base58(object):
typedef struct _mp_obj_Base58_t {
mp_obj_base_t base;
} mp_obj_Base58_t;
// def Base58.__init__(self)
STATIC mp_obj_t mod_TrezorCrypto_Base58_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 0, 0, false);
mp_obj_Base58_t *o = m_new_obj(mp_obj_Base58_t);
o->base.type = type;
return MP_OBJ_FROM_PTR(o);
}
// def Base58.encode(self, data: bytes) -> str
STATIC mp_obj_t mod_TrezorCrypto_Base58_encode(mp_obj_t self, mp_obj_t data) {
mp_buffer_info_t databuf;
mp_get_buffer_raise(data, &databuf, MP_BUFFER_READ);
vstr_t vstr;
vstr_init_len(&vstr, databuf.len * 8000 / 5857 + 1); // 256 = 2^8 ; 58 > 2^5.857
bool r = b58enc(vstr.buf, &vstr.len, databuf.buf, databuf.len);
if (!r) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid input"));
}
vstr.len--; // b58enc returns length including the trailing zero
return mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_Base58_encode_obj, mod_TrezorCrypto_Base58_encode);
// def Base58.decode(self, string: str) -> bytes
STATIC mp_obj_t mod_TrezorCrypto_Base58_decode(mp_obj_t self, mp_obj_t string) {
mp_buffer_info_t stringbuf;
mp_get_buffer_raise(string, &stringbuf, MP_BUFFER_READ);
vstr_t vstr;
vstr_init_len(&vstr, stringbuf.len * 5858 / 8000 + 1); // 256 = 2^8 ; 58 < 2^5.858
bool r = b58tobin(vstr.buf, &vstr.len, stringbuf.buf);
if (!r) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid input"));
}
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_Base58_decode_obj, mod_TrezorCrypto_Base58_decode);
// Base58 stuff
STATIC const mp_rom_map_elem_t mod_TrezorCrypto_Base58_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_encode), MP_ROM_PTR(&mod_TrezorCrypto_Base58_encode_obj) },
{ MP_ROM_QSTR(MP_QSTR_decode), MP_ROM_PTR(&mod_TrezorCrypto_Base58_decode_obj) },
};
STATIC MP_DEFINE_CONST_DICT(mod_TrezorCrypto_Base58_locals_dict, mod_TrezorCrypto_Base58_locals_dict_table);
STATIC const mp_obj_type_t mod_TrezorCrypto_Base58_type = {
{ &mp_type_type },
.name = MP_QSTR_Base58,
.make_new = mod_TrezorCrypto_Base58_make_new,
.locals_dict = (void*)&mod_TrezorCrypto_Base58_locals_dict,
};

2
extmod/modtrezorcrypto/modtrezorcrypto.c
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@ -15,7 +15,6 @@
#if MICROPY_PY_TREZORCRYPTO
#include "modtrezorcrypto-base58.h"
#include "modtrezorcrypto-pbkdf2_hmac.h"
#include "modtrezorcrypto-ripemd160.h"
#include "modtrezorcrypto-sha256.h"
@ -25,7 +24,6 @@
STATIC const mp_rom_map_elem_t mp_module_TrezorCrypto_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_TrezorCrypto) },
{ MP_ROM_QSTR(MP_QSTR_Base58), MP_ROM_PTR(&mod_TrezorCrypto_Base58_type) },
{ MP_ROM_QSTR(MP_QSTR_Ripemd160), MP_ROM_PTR(&mod_TrezorCrypto_Ripemd160_type) },
{ MP_ROM_QSTR(MP_QSTR_Sha256), MP_ROM_PTR(&mod_TrezorCrypto_Sha256_type) },
{ MP_ROM_QSTR(MP_QSTR_Sha512), MP_ROM_PTR(&mod_TrezorCrypto_Sha512_type) },

80
src/trezor/crypto/base58.py
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from TrezorCrypto import Base58
#
# Copyright (c) 2015 David Keijser <keijser@gmail.com>
# Copyright (c) 2016 Pavol Rusnak <stick@gk2.sk>
#
# Licensed under MIT License
#
# Implementations of Base58 and Base58Check encodings that are compatible
# with the bitcoin network.
#
# This module is based upon base58 snippets found scattered over many bitcoin
# tools written in python. From what I gather the original source is from a
# forum post by Gavin Andresen, so direct your praise to him.
# This module adds shiny packaging and support for python3.
#
from .hashlib import sha256
_base58 = Base58()
# 58 character alphabet used
alphabet = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
def encode(v):
origlen = len(v)
v = v.lstrip(b'\0')
newlen = len(v)
p, acc = 1, 0
for c in reversed(v):
acc += p * c
p = p << 8
result = ''
while acc > 0:
acc, mod = divmod(acc, 58)
result += alphabet[mod]
return ''.join([c for c in reversed(result + alphabet[0] * (origlen - newlen))])
def decode(v):
origlen = len(v)
v = v.lstrip(alphabet[0])
newlen = len(v)
p, acc = 1, 0
for c in reversed(v):
acc += p * alphabet.index(c)
p *= 58
result = []
while acc > 0:
acc, mod = divmod(acc, 256)
result.append(mod)
return bytes([b for b in reversed(result +[0] * (origlen - newlen))])
def encode_check(v):
digest = sha256(sha256(v).digest()).digest()
return encode(v + digest[:4])
def encode(data):
return _base58.encode(data)
def decode(string):
return _base58.decode(string)
def decode_check(v):
result = decode(v)
result, check = result[:-4], result[-4:]
digest = sha256(sha256(result).digest()).digest()
def encode_check(data, hashlen=4):
h = sha256(sha256(data).digest()).digest()
return encode(data + h[:hashlen])
if check != digest[:4]:
raise ValueError("Invalid checksum")
def decode_check(string, hashlen=4):
data = decode(string)
d, h1 = data[:-hashlen], data[-hashlen:]
h2 = sha256(sha256(d).digest).digest()[:4]
if h1 != h2:
raise RuntimeError('Checksum error')
return d
return result

2
vendor/micropython vendored

@ -1 +1 @@
Subproject commit 07d410191ad0bb5560a7a35a234291a8488f8e56
Subproject commit 220438d7b96746cf5f53114c1b946acb56ff83e9
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