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modtrezorcrypto: remove ssss (different implementation will be re-added later)

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Pavol Rusnak 2018-01-02 14:13:25 +01:00
parent 4cc8a5432d
commit b9d5af8c19
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GPG Key ID: 91F3B339B9A02A3D
6 changed files with 0 additions and 132 deletions
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1
SConscript.firmware
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@ -31,7 +31,6 @@ SOURCE_MOD += [
'embed/extmod/modtrezorcrypto/modtrezorcrypto.c',
'embed/extmod/modtrezorcrypto/crc.c',
'embed/extmod/modtrezorcrypto/rand.c',
'embed/extmod/modtrezorcrypto/ssss.c',
'vendor/trezor-crypto/address.c',
'vendor/trezor-crypto/aes/aescrypt.c',
'vendor/trezor-crypto/aes/aeskey.c',

1
SConscript.unix
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@ -32,7 +32,6 @@ SOURCE_MOD += [
'embed/extmod/modtrezorcrypto/modtrezorcrypto.c',
'embed/extmod/modtrezorcrypto/crc.c',
'embed/extmod/modtrezorcrypto/rand.c',
'embed/extmod/modtrezorcrypto/ssss.c',
'vendor/trezor-crypto/address.c',
'vendor/trezor-crypto/aes/aescrypt.c',
'vendor/trezor-crypto/aes/aeskey.c',

90
embed/extmod/modtrezorcrypto/modtrezorcrypto-ssss.h
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@ -1,90 +0,0 @@
/*
* Copyright (c) Pavol Rusnak, SatoshiLabs
*
* Licensed under TREZOR License
* see LICENSE file for details
*/
#include "py/objstr.h"
#include "bignum.h"
#include "ssss.h"
/// def split(m: int, n: int, secret: bytes) -> tuple:
/// '''
/// Split secret to (M of N) shares using Shamir's Secret Sharing Scheme.
/// '''
STATIC mp_obj_t mod_trezorcrypto_ssss_split(mp_obj_t m_obj, mp_obj_t n_obj, mp_obj_t secret_obj) {
mp_int_t m = mp_obj_get_int(m_obj);
mp_int_t n = mp_obj_get_int(n_obj);
mp_buffer_info_t secret;
mp_get_buffer_raise(secret_obj, &secret, MP_BUFFER_READ);
if (secret.len != 32) {
mp_raise_ValueError("Length of the secret has to be 256 bits");
}
if (m < 1 || n < 1 || m > 15 || n > 15 || m > n) {
mp_raise_ValueError("Invalid number of shares");
}
bignum256 sk;
bignum256 shares[n];
bn_read_be(secret.buf, &sk);
if (!ssss_split(&sk, m, n, shares)) {
mp_raise_ValueError("Error splitting secret");
}
mp_obj_tuple_t *tuple = MP_OBJ_TO_PTR(mp_obj_new_tuple(n, NULL));
vstr_t vstr[n];
for (int i = 0; i < n; i++) {
vstr_init_len(&vstr[i], secret.len);
bn_write_be(&shares[i], secret.buf);
tuple->items[i] = mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr[i]);
}
return MP_OBJ_FROM_PTR(tuple);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(mod_trezorcrypto_ssss_split_obj, mod_trezorcrypto_ssss_split);
/// def combine(shares: tuple) -> bytes:
/// '''
/// Combine M shares of Shamir's Secret Sharing Scheme into secret.
/// '''
STATIC mp_obj_t mod_trezorcrypto_ssss_combine(mp_obj_t shares_obj) {
size_t n;
mp_obj_t *share;
mp_obj_get_array(shares_obj, &n, &share);
if (n < 1 || n > 15) {
mp_raise_ValueError("Invalid number of shares");
}
bignum256 bnshares[n];
for (size_t i = 0; i < n; i++) {
if (MP_OBJ_IS_TYPE(share[i], &mp_type_bytes)) {
mp_buffer_info_t s;
mp_get_buffer_raise(share[i], &s, MP_BUFFER_READ);
if (s.len != 32) {
mp_raise_ValueError("Length of share has to be 256 bits");
}
bn_read_be(s.buf, &bnshares[n]);
} else {
memset(&bnshares[i], 0, sizeof(bignum256));
}
}
bignum256 sk;
if (!ssss_combine(bnshares, n, &sk)) {
mp_raise_ValueError("Error combining secret");
}
vstr_t vstr;
vstr_init_len(&vstr, 32);
bn_write_be(&sk, (uint8_t *)vstr.buf);
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_ssss_combine_obj, mod_trezorcrypto_ssss_combine);
STATIC const mp_rom_map_elem_t mod_trezorcrypto_ssss_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_ssss) },
{ MP_ROM_QSTR(MP_QSTR_split), MP_ROM_PTR(&mod_trezorcrypto_ssss_split_obj) },
{ MP_ROM_QSTR(MP_QSTR_combine), MP_ROM_PTR(&mod_trezorcrypto_ssss_combine_obj) },
};
STATIC MP_DEFINE_CONST_DICT(mod_trezorcrypto_ssss_globals, mod_trezorcrypto_ssss_globals_table);
STATIC const mp_obj_module_t mod_trezorcrypto_ssss_module = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t*)&mod_trezorcrypto_ssss_globals,
};

2
embed/extmod/modtrezorcrypto/modtrezorcrypto.c
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@ -33,7 +33,6 @@
#include "modtrezorcrypto-sha512.h"
#include "modtrezorcrypto-sha3-256.h"
#include "modtrezorcrypto-sha3-512.h"
#include "modtrezorcrypto-ssss.h"
STATIC const mp_rom_map_elem_t mp_module_trezorcrypto_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_trezorcrypto) },
@ -57,7 +56,6 @@ STATIC const mp_rom_map_elem_t mp_module_trezorcrypto_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR_sha512), MP_ROM_PTR(&mod_trezorcrypto_Sha512_type) },
{ MP_ROM_QSTR(MP_QSTR_sha3_256), MP_ROM_PTR(&mod_trezorcrypto_Sha3_256_type) },
{ MP_ROM_QSTR(MP_QSTR_sha3_512), MP_ROM_PTR(&mod_trezorcrypto_Sha3_512_type) },
{ MP_ROM_QSTR(MP_QSTR_ssss), MP_ROM_PTR(&mod_trezorcrypto_ssss_module) },
};
STATIC MP_DEFINE_CONST_DICT(mp_module_trezorcrypto_globals, mp_module_trezorcrypto_globals_table);

21
embed/extmod/modtrezorcrypto/ssss.c
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@ -1,21 +0,0 @@
/*
* Copyright (c) Pavol Rusnak, SatoshiLabs
*
* Licensed under TREZOR License
* see LICENSE file for details
*/
#include "ssss.h"
bool ssss_split(const bignum256 *secret, int m, int n, bignum256 *shares)
{
if (m < 1 || n < 1 || m > 15 || n > 15 || m > n) {
return false;
}
return true;
}
bool ssss_combine(const bignum256 *shares, int n, bignum256 *secret)
{
return true;
}

17
embed/extmod/modtrezorcrypto/ssss.h
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@ -1,17 +0,0 @@
/*
* Copyright (c) Pavol Rusnak, SatoshiLabs
*
* Licensed under TREZOR License
* see LICENSE file for details
*/
#ifndef __SSSS_H__
#define __SSSS_H__
#include <stdbool.h>
#include "bignum.h"
bool ssss_split(const bignum256 *secret, int m, int n, bignum256 *shares);
bool ssss_combine(const bignum256 *shares, int n, bignum256 *secret);
#endif