mirror of
https://github.com/trezor/trezor-firmware.git
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117 lines
4.2 KiB
C
117 lines
4.2 KiB
C
/* Copyright (c) 2017, 2021 Pieter Wuille
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* 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 in
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* 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 OR
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* 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 THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef _SEGWIT_ADDR_H_
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#define _SEGWIT_ADDR_H_ 1
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#include <stdint.h>
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// The maximum length of the Bech32 human-readable part according to BIP-173.
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#define BECH32_MAX_HRP_LEN 83
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/** Encode a SegWit address
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*
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* Out: output: Pointer to a buffer of size 73 + strlen(hrp) that will be
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* updated to contain the null-terminated address.
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* In: hrp: Pointer to the null-terminated human readable part to use
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* (chain/network specific).
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* ver: Version of the witness program (between 0 and 16 inclusive).
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* prog: Data bytes for the witness program (between 2 and 40 bytes).
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* prog_len: Number of data bytes in prog.
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* Returns 1 if successful.
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*/
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int segwit_addr_encode(
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char *output,
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const char *hrp,
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int ver,
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const uint8_t *prog,
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size_t prog_len
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);
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/** Decode a SegWit address
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*
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* Out: ver: Pointer to an int that will be updated to contain the witness
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* program version (between 0 and 16 inclusive).
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* prog: Pointer to a buffer of size 40 that will be updated to
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* contain the witness program bytes.
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* prog_len: Pointer to a size_t that will be updated to contain the length
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* of bytes in prog.
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* hrp: Pointer to the null-terminated human readable part that is
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* expected (chain/network specific).
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* addr: Pointer to the null-terminated address.
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* Returns 1 if successful.
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*/
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int segwit_addr_decode(
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int* ver,
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uint8_t* prog,
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size_t* prog_len,
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const char* hrp,
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const char* addr
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);
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/** Supported encodings. */
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typedef enum {
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BECH32_ENCODING_NONE,
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BECH32_ENCODING_BECH32,
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BECH32_ENCODING_BECH32M
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} bech32_encoding;
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/** Encode a Bech32 or Bech32m string
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*
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* Out: output: Pointer to a buffer of size strlen(hrp) + data_len + 8 that
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* will be updated to contain the null-terminated Bech32 string.
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* In: hrp : Pointer to the null-terminated human readable part.
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* data : Pointer to an array of 5-bit values.
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* data_len: Length of the data array.
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* enc: Which encoding to use (BECH32_ENCODING_BECH32{,M}).
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* Returns 1 if successful.
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*/
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int bech32_encode(
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char *output,
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const char *hrp,
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const uint8_t *data,
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size_t data_len,
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bech32_encoding enc
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);
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/** Decode a Bech32 or Bech32m string
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*
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* Out: hrp: Pointer to a buffer of size BECH32_MAX_HRP_LEN + 1. Will be
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* updated to contain the null-terminated human readable part.
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* data: Pointer to a buffer of size strlen(input) - 8 that will
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* hold the encoded 5-bit data values.
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* data_len: Pointer to a size_t that will be updated to be the number
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* of entries in data.
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* In: input: Pointer to a null-terminated Bech32 string.
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* Returns BECH32_ENCODING_BECH32{,M} to indicate decoding was successful
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* with the specified encoding standard. BECH32_ENCODING_NONE is returned if
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* decoding failed.
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*/
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bech32_encoding bech32_decode(
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char *hrp,
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uint8_t *data,
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size_t *data_len,
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const char *input
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);
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#endif
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