mirror of
https://github.com/trezor/trezor-firmware.git
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92 lines
3.3 KiB
C
92 lines
3.3 KiB
C
/**
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* Copyright (c) 2016 Daira Hopwood
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* Copyright (c) 2016 Pavol Rusnak
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
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* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "address.h"
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#include "bignum.h"
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size_t address_prefix_bytes_len(uint32_t address_type) {
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if (address_type <= 0xFF) return 1;
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if (address_type <= 0xFFFF) return 2;
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if (address_type <= 0xFFFFFF) return 3;
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return 4;
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}
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void address_write_prefix_bytes(uint32_t address_type, uint8_t *out) {
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if (address_type > 0xFFFFFF) *(out++) = address_type >> 24;
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if (address_type > 0xFFFF) *(out++) = (address_type >> 16) & 0xFF;
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if (address_type > 0xFF) *(out++) = (address_type >> 8) & 0xFF;
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*(out++) = address_type & 0xFF;
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}
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bool address_check_prefix(const uint8_t *addr, uint32_t address_type) {
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if (address_type <= 0xFF) {
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return address_type == (uint32_t)(addr[0]);
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}
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if (address_type <= 0xFFFF) {
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return address_type == (((uint32_t)addr[0] << 8) | ((uint32_t)addr[1]));
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}
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if (address_type <= 0xFFFFFF) {
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return address_type == (((uint32_t)addr[0] << 16) |
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((uint32_t)addr[1] << 8) | ((uint32_t)addr[2]));
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}
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return address_type ==
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(((uint32_t)addr[0] << 24) | ((uint32_t)addr[1] << 16) |
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((uint32_t)addr[2] << 8) | ((uint32_t)addr[3]));
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}
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#if USE_ETHEREUM
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#include "sha3.h"
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void ethereum_address_checksum(const uint8_t *addr, char *address, bool rskip60,
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uint32_t chain_id) {
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const char *hex = "0123456789abcdef";
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for (int i = 0; i < 20; i++) {
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address[i * 2] = hex[(addr[i] >> 4) & 0xF];
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address[i * 2 + 1] = hex[addr[i] & 0xF];
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}
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address[40] = 0;
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SHA3_CTX ctx = {0};
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uint8_t hash[32] = {0};
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keccak_256_Init(&ctx);
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if (rskip60) {
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char prefix[16] = {0};
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int prefix_size = bn_format_uint64(chain_id, NULL, "0x", 0, 0, false,
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prefix, sizeof(prefix));
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keccak_Update(&ctx, (const uint8_t *)prefix, prefix_size);
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}
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keccak_Update(&ctx, (const uint8_t *)address, 40);
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keccak_Final(&ctx, hash);
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for (int i = 0; i < 20; i++) {
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if (hash[i] & 0x80 && address[i * 2] >= 'a' && address[i * 2] <= 'f') {
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address[i * 2] -= 0x20;
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}
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if (hash[i] & 0x08 && address[i * 2 + 1] >= 'a' &&
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address[i * 2 + 1] <= 'f') {
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address[i * 2 + 1] -= 0x20;
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}
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}
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}
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#endif
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