mirror of
https://github.com/trezor/trezor-firmware.git
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65 lines
2.4 KiB
C
65 lines
2.4 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, E1PRESS
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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 "nem.h"
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#include <stddef.h>
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#include <string.h>
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#include "base32.h"
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#include "macros.h"
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#include "ripemd160.h"
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#include "sha3.h"
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void nem_get_address_raw(const ed25519_public_key public_key, uint8_t version, uint8_t *address) {
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uint8_t hash[SHA3_256_DIGEST_LENGTH];
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/* 1. Perform 256-bit Sha3 on the public key */
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keccak_256(public_key, sizeof(ed25519_public_key), hash);
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/* 2. Perform 160-bit Ripemd of hash resulting from step 1. */
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ripemd160(hash, SHA3_256_DIGEST_LENGTH, &address[1]);
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/* 3. Prepend version byte to Ripemd hash (either 0x68 or 0x98) */
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address[0] = version;
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/* 4. Perform 256-bit Sha3 on the result, take the first four bytes as a checksum */
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keccak_256(address, 1 + RIPEMD160_DIGEST_LENGTH, hash);
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/* 5. Concatenate output of step 3 and the checksum from step 4 */
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memcpy(&address[1 + RIPEMD160_DIGEST_LENGTH], hash, 4);
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MEMSET_BZERO(hash, sizeof(hash));
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}
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bool nem_get_address(const ed25519_public_key public_key, uint8_t version, char *address) {
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uint8_t pubkeyhash[NEM_ADDRESS_SIZE_RAW];
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nem_get_address_raw(public_key, version, pubkeyhash);
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char *ret = base32_encode(pubkeyhash, sizeof(pubkeyhash), address, NEM_ADDRESS_SIZE + 1, BASE32_ALPHABET_RFC4648);
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MEMSET_BZERO(pubkeyhash, sizeof(pubkeyhash));
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return (ret != NULL);
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}
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