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https://github.com/trezor/trezor-firmware.git
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c70e440128
This allows us to finely control when to use a single hash or a double hash in various places. For example, Bitcoin signatures use double SHA256, but Decred signatures use a single BLAKE256. However, both use double hashes for Base58.
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/**
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* Copyright (c) 2017 Saleem Rashid
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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 "hasher.h"
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void hasher_Init(Hasher *hasher, HasherType type) {
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hasher->type = type;
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switch (hasher->type) {
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case HASHER_SHA2:
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case HASHER_SHA2D:
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sha256_Init(&hasher->ctx.sha2);
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break;
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case HASHER_BLAKE:
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case HASHER_BLAKED:
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blake256_Init(&hasher->ctx.blake);
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break;
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}
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}
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void hasher_Reset(Hasher *hasher) {
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hasher_Init(hasher, hasher->type);
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}
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void hasher_Update(Hasher *hasher, const uint8_t *data, size_t length) {
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switch (hasher->type) {
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case HASHER_SHA2:
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case HASHER_SHA2D:
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sha256_Update(&hasher->ctx.sha2, data, length);
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break;
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case HASHER_BLAKE:
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case HASHER_BLAKED:
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blake256_Update(&hasher->ctx.blake, data, length);
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break;
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}
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}
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void hasher_Final(Hasher *hasher, uint8_t hash[HASHER_DIGEST_LENGTH]) {
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switch (hasher->type) {
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case HASHER_SHA2:
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case HASHER_SHA2D:
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sha256_Final(&hasher->ctx.sha2, hash);
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break;
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case HASHER_BLAKE:
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case HASHER_BLAKED:
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blake256_Final(&hasher->ctx.blake, hash);
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break;
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}
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switch (hasher->type) {
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case HASHER_SHA2D:
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hasher_Raw(HASHER_SHA2, hash, HASHER_DIGEST_LENGTH, hash);
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break;
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case HASHER_BLAKED:
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hasher_Raw(HASHER_BLAKE, hash, HASHER_DIGEST_LENGTH, hash);
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break;
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default:
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break;
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}
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}
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void hasher_Raw(HasherType type, const uint8_t *data, size_t length, uint8_t hash[HASHER_DIGEST_LENGTH]) {
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Hasher hasher;
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hasher_Init(&hasher, type);
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hasher_Update(&hasher, data, length);
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hasher_Final(&hasher, hash);
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}
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