mirror of
https://github.com/trezor/trezor-firmware.git
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55 lines
2.2 KiB
C
55 lines
2.2 KiB
C
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/**
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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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size_t address_prefix_bytes_len(uint32_t address_type)
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{
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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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{
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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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{
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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) | (uint32_t)(addr[1] << 8) | (uint32_t)(addr[2]));
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}
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return address_type == ((uint32_t)(addr[0] << 24) | (uint32_t)(addr[1] << 16) | (uint32_t)(addr[2] << 8) | (uint32_t)(addr[3]));
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}
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