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Bech32 (BIP173) address support
This commit is contained in:
parent
56114cc0a6
commit
506167e3f2
1
Makefile
1
Makefile
@ -50,6 +50,7 @@ SRCS += blake2b.c blake2s.c
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SRCS += chacha20poly1305/chacha20poly1305.c chacha20poly1305/chacha_merged.c chacha20poly1305/poly1305-donna.c chacha20poly1305/rfc7539.c
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SRCS += rc4.c
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SRCS += nem.c
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SRCS += segwit_addr.c
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OBJS = $(SRCS:.c=.o)
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187
segwit_addr.c
Normal file
187
segwit_addr.c
Normal file
@ -0,0 +1,187 @@
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/* Copyright (c) 2017 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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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include "segwit_addr.h"
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uint32_t bech32_polymod_step(uint32_t pre) {
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uint8_t b = pre >> 25;
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return ((pre & 0x1FFFFFF) << 5) ^
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(-((b >> 0) & 1) & 0x3b6a57b2UL) ^
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(-((b >> 1) & 1) & 0x26508e6dUL) ^
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(-((b >> 2) & 1) & 0x1ea119faUL) ^
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(-((b >> 3) & 1) & 0x3d4233ddUL) ^
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(-((b >> 4) & 1) & 0x2a1462b3UL);
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}
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static const char* charset = "qpzry9x8gf2tvdw0s3jn54khce6mua7l";
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static const int8_t charset_rev[128] = {
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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15, -1, 10, 17, 21, 20, 26, 30, 7, 5, -1, -1, -1, -1, -1, -1,
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-1, 29, -1, 24, 13, 25, 9, 8, 23, -1, 18, 22, 31, 27, 19, -1,
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1, 0, 3, 16, 11, 28, 12, 14, 6, 4, 2, -1, -1, -1, -1, -1,
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-1, 29, -1, 24, 13, 25, 9, 8, 23, -1, 18, 22, 31, 27, 19, -1,
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1, 0, 3, 16, 11, 28, 12, 14, 6, 4, 2, -1, -1, -1, -1, -1
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};
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int bech32_encode(char *output, const char *hrp, const uint8_t *data, size_t data_len) {
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uint32_t chk = 1;
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size_t i = 0;
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while (hrp[i] != 0) {
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if (hrp[i] >= 'A' && hrp[i] <= 'Z') return 0;
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if (!(hrp[i] >> 5)) return 0;
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chk = bech32_polymod_step(chk) ^ (hrp[i] >> 5);
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++i;
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}
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if (i + 7 + data_len > 90) return 0;
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chk = bech32_polymod_step(chk);
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while (*hrp != 0) {
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chk = bech32_polymod_step(chk) ^ (*hrp & 0x1f);
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*(output++) = *(hrp++);
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}
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*(output++) = '1';
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for (i = 0; i < data_len; ++i) {
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if (*data >> 5) return 0;
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chk = bech32_polymod_step(chk) ^ (*data);
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*(output++) = charset[*(data++)];
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}
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for (i = 0; i < 6; ++i) {
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chk = bech32_polymod_step(chk);
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}
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chk ^= 1;
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for (i = 0; i < 6; ++i) {
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*(output++) = charset[(chk >> ((5 - i) * 5)) & 0x1f];
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}
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*output = 0;
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return 1;
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}
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int bech32_decode(char* hrp, uint8_t *data, size_t *data_len, const char *input) {
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uint32_t chk = 1;
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size_t i;
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size_t input_len = strlen(input);
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size_t hrp_len;
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int have_lower = 0, have_upper = 0;
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if (input_len < 8 || input_len > 90) {
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return 0;
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}
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*data_len = 0;
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while (*data_len < input_len && input[(input_len - 1) - *data_len] != '1') {
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++(*data_len);
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}
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hrp_len = input_len - (1 + *data_len);
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if (hrp_len < 1 || *data_len < 6) {
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return 0;
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}
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*(data_len) -= 6;
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for (i = 0; i < hrp_len; ++i) {
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int ch = input[i];
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if (ch < 33 || ch > 126) {
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return 0;
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}
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if (ch >= 'a' && ch <= 'z') {
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have_lower = 1;
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} else if (ch >= 'A' && ch <= 'Z') {
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have_upper = 1;
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ch = (ch - 'A') + 'a';
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}
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hrp[i] = ch;
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chk = bech32_polymod_step(chk) ^ (ch >> 5);
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}
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hrp[i] = 0;
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chk = bech32_polymod_step(chk);
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for (i = 0; i < hrp_len; ++i) {
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chk = bech32_polymod_step(chk) ^ (input[i] & 0x1f);
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}
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++i;
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while (i < input_len) {
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int v = (input[i] & 0x80) ? -1 : charset_rev[(int)input[i]];
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if (input[i] >= 'a' && input[i] <= 'z') have_lower = 1;
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if (input[i] >= 'A' && input[i] <= 'Z') have_upper = 1;
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if (v == -1) {
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return 0;
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}
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chk = bech32_polymod_step(chk) ^ v;
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if (i + 6 < input_len) {
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data[i - (1 + hrp_len)] = v;
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}
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++i;
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}
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if (have_lower && have_upper) {
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return 0;
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}
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return chk == 1;
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}
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static int convert_bits(uint8_t* out, size_t* outlen, int outbits, const uint8_t* in, size_t inlen, int inbits, int pad) {
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uint32_t val = 0;
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int bits = 0;
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uint32_t maxv = (((uint32_t)1) << outbits) - 1;
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while (inlen--) {
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val = (val << inbits) | *(in++);
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bits += inbits;
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while (bits >= outbits) {
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bits -= outbits;
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out[(*outlen)++] = (val >> bits) & maxv;
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}
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}
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if (pad) {
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if (bits) {
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out[(*outlen)++] = (val << (outbits - bits)) & maxv;
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}
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} else if (((val << (outbits - bits)) & maxv) || bits >= inbits) {
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return 0;
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}
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return 1;
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}
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int segwit_addr_encode(char *output, const char *hrp, int witver, const uint8_t *witprog, size_t witprog_len) {
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uint8_t data[65];
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size_t datalen = 0;
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if (witver > 16) return 0;
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if (witver == 0 && witprog_len != 20 && witprog_len != 32) return 0;
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if (witprog_len < 2 || witprog_len > 40) return 0;
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data[0] = witver;
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convert_bits(data + 1, &datalen, 5, witprog, witprog_len, 8, 1);
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++datalen;
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return bech32_encode(output, hrp, data, datalen);
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}
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int segwit_addr_decode(int* witver, uint8_t* witdata, size_t* witdata_len, const char* hrp, const char* addr) {
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uint8_t data[84];
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char hrp_actual[84];
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size_t data_len;
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if (!bech32_decode(hrp_actual, data, &data_len, addr)) return 0;
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if (data_len == 0 || data_len > 65) return 0;
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if (strncmp(hrp, hrp_actual, 84) != 0) return 0;
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if (data[0] > 16) return 0;
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*witdata_len = 0;
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if (!convert_bits(witdata, witdata_len, 8, data + 1, data_len - 1, 5, 0)) return 0;
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if (*witdata_len < 2 || *witdata_len > 40) return 0;
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if (data[0] == 0 && *witdata_len != 20 && *witdata_len != 32) return 0;
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*witver = data[0];
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return 1;
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}
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101
segwit_addr.h
Normal file
101
segwit_addr.h
Normal file
@ -0,0 +1,101 @@
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/* Copyright (c) 2017 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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/** 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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/** Encode a Bech32 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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* 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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);
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/** Decode a Bech32 string
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*
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* Out: hrp: Pointer to a buffer of size strlen(input) - 6. 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 1 if succesful.
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*/
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int 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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@ -4053,6 +4053,8 @@ START_TEST(test_rc4_rfc6229)
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}
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END_TEST
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#include "test_segwit.c"
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// define test suite and cases
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Suite *test_suite(void)
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{
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@ -4266,6 +4268,10 @@ Suite *test_suite(void)
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tcase_add_test(tc, test_rc4_rfc6229);
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suite_add_tcase(s, tc);
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tc = tcase_create("segwit");
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tcase_add_test(tc, test_segwit);
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suite_add_tcase(s, tc);
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return s;
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}
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190
test_segwit.c
Normal file
190
test_segwit.c
Normal file
@ -0,0 +1,190 @@
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <check.h>
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#include "segwit_addr.h"
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static const char* valid_checksum[] = {
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"A12UEL5L",
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"an83characterlonghumanreadablepartthatcontainsthenumber1andtheexcludedcharactersbio1tt5tgs",
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"abcdef1qpzry9x8gf2tvdw0s3jn54khce6mua7lmqqqxw",
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"11qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqc8247j",
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"split1checkupstagehandshakeupstreamerranterredcaperred2y9e3w",
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};
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static const char* invalid_checksum[] = {
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" 1nwldj5",
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"\x7f""1axkwrx",
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"an84characterslonghumanreadablepartthatcontainsthenumber1andtheexcludedcharactersbio1569pvx",
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"pzry9x0s0muk",
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"1pzry9x0s0muk",
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"x1b4n0q5v",
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"li1dgmt3",
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"de1lg7wt\xff",
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};
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struct valid_address_data {
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const char* address;
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size_t scriptPubKeyLen;
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const uint8_t scriptPubKey[42];
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};
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struct invalid_address_data {
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const char* hrp;
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int version;
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size_t program_length;
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};
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static struct valid_address_data valid_address[] = {
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{
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"BC1QW508D6QEJXTDG4Y5R3ZARVARY0C5XW7KV8F3T4",
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22, {
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0x00, 0x14, 0x75, 0x1e, 0x76, 0xe8, 0x19, 0x91, 0x96, 0xd4, 0x54,
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0x94, 0x1c, 0x45, 0xd1, 0xb3, 0xa3, 0x23, 0xf1, 0x43, 0x3b, 0xd6
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}
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},
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{
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"tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sl5k7",
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34, {
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0x00, 0x20, 0x18, 0x63, 0x14, 0x3c, 0x14, 0xc5, 0x16, 0x68, 0x04,
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0xbd, 0x19, 0x20, 0x33, 0x56, 0xda, 0x13, 0x6c, 0x98, 0x56, 0x78,
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0xcd, 0x4d, 0x27, 0xa1, 0xb8, 0xc6, 0x32, 0x96, 0x04, 0x90, 0x32,
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0x62
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}
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},
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{
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"bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7k7grplx",
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42, {
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0x51, 0x28, 0x75, 0x1e, 0x76, 0xe8, 0x19, 0x91, 0x96, 0xd4, 0x54,
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0x94, 0x1c, 0x45, 0xd1, 0xb3, 0xa3, 0x23, 0xf1, 0x43, 0x3b, 0xd6,
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0x75, 0x1e, 0x76, 0xe8, 0x19, 0x91, 0x96, 0xd4, 0x54, 0x94, 0x1c,
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0x45, 0xd1, 0xb3, 0xa3, 0x23, 0xf1, 0x43, 0x3b, 0xd6
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}
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},
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{
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"BC1SW50QA3JX3S",
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4, {
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0x60, 0x02, 0x75, 0x1e
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}
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},
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{
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"bc1zw508d6qejxtdg4y5r3zarvaryvg6kdaj",
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18, {
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0x52, 0x10, 0x75, 0x1e, 0x76, 0xe8, 0x19, 0x91, 0x96, 0xd4, 0x54,
|
||||
0x94, 0x1c, 0x45, 0xd1, 0xb3, 0xa3, 0x23
|
||||
}
|
||||
},
|
||||
{
|
||||
"tb1qqqqqp399et2xygdj5xreqhjjvcmzhxw4aywxecjdzew6hylgvsesrxh6hy",
|
||||
34, {
|
||||
0x00, 0x20, 0x00, 0x00, 0x00, 0xc4, 0xa5, 0xca, 0xd4, 0x62, 0x21,
|
||||
0xb2, 0xa1, 0x87, 0x90, 0x5e, 0x52, 0x66, 0x36, 0x2b, 0x99, 0xd5,
|
||||
0xe9, 0x1c, 0x6c, 0xe2, 0x4d, 0x16, 0x5d, 0xab, 0x93, 0xe8, 0x64,
|
||||
0x33
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
static const char* invalid_address[] = {
|
||||
"tc1qw508d6qejxtdg4y5r3zarvary0c5xw7kg3g4ty",
|
||||
"bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t5",
|
||||
"BC13W508D6QEJXTDG4Y5R3ZARVARY0C5XW7KN40WF2",
|
||||
"bc1rw5uspcuh",
|
||||
"bc10w508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7kw5rljs90",
|
||||
"BC1QR508D6QEJXTDG4Y5R3ZARVARYV98GJ9P",
|
||||
"tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3q0sL5k7",
|
||||
"bc1zw508d6qejxtdg4y5r3zarvaryvqyzf3du",
|
||||
"tb1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3pjxtptv",
|
||||
"bc1gmk9yu",
|
||||
};
|
||||
|
||||
static struct invalid_address_data invalid_address_enc[] = {
|
||||
{"BC", 0, 20},
|
||||
{"bc", 0, 21},
|
||||
{"bc", 17, 32},
|
||||
{"bc", 1, 1},
|
||||
{"bc", 16, 41},
|
||||
};
|
||||
|
||||
static void segwit_scriptpubkey(uint8_t* scriptpubkey, size_t* scriptpubkeylen, int witver, const uint8_t* witprog, size_t witprog_len) {
|
||||
scriptpubkey[0] = witver ? (0x50 + witver) : 0;
|
||||
scriptpubkey[1] = witprog_len;
|
||||
memcpy(scriptpubkey + 2, witprog, witprog_len);
|
||||
*scriptpubkeylen = witprog_len + 2;
|
||||
}
|
||||
|
||||
int my_strncasecmp(const char *s1, const char *s2, size_t n) {
|
||||
size_t i = 0;
|
||||
while (i < n) {
|
||||
char c1 = s1[i];
|
||||
char c2 = s2[i];
|
||||
if (c1 >= 'A' && c1 <= 'Z') c1 = (c1 - 'A') + 'a';
|
||||
if (c2 >= 'A' && c2 <= 'Z') c2 = (c2 - 'A') + 'a';
|
||||
if (c1 < c2) return -1;
|
||||
if (c1 > c2) return 1;
|
||||
if (c1 == 0) return 0;
|
||||
++i;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
START_TEST(test_segwit)
|
||||
{
|
||||
size_t i;
|
||||
for (i = 0; i < sizeof(valid_checksum) / sizeof(valid_checksum[0]); ++i) {
|
||||
uint8_t data[82];
|
||||
char rebuild[92];
|
||||
char hrp[84];
|
||||
size_t data_len;
|
||||
int res = bech32_decode(hrp, data, &data_len, valid_checksum[i]);
|
||||
ck_assert_int_eq(res, 1);
|
||||
res = bech32_encode(rebuild, hrp, data, data_len);
|
||||
ck_assert_int_eq(res, 1);
|
||||
ck_assert_int_eq(my_strncasecmp(rebuild, valid_checksum[i], 92), 0);
|
||||
}
|
||||
for (i = 0; i < sizeof(invalid_checksum) / sizeof(invalid_checksum[0]); ++i) {
|
||||
uint8_t data[82];
|
||||
char hrp[84];
|
||||
size_t data_len;
|
||||
int res = bech32_decode(hrp, data, &data_len, invalid_checksum[i]);
|
||||
ck_assert_int_eq(res, 0);
|
||||
}
|
||||
for (i = 0; i < sizeof(valid_address) / sizeof(valid_address[0]); ++i) {
|
||||
uint8_t witprog[40];
|
||||
size_t witprog_len;
|
||||
int witver;
|
||||
const char* hrp = "bc";
|
||||
uint8_t scriptpubkey[42];
|
||||
size_t scriptpubkey_len;
|
||||
char rebuild[93];
|
||||
int ret = segwit_addr_decode(&witver, witprog, &witprog_len, hrp, valid_address[i].address);
|
||||
if (!ret) {
|
||||
hrp = "tb";
|
||||
ret = segwit_addr_decode(&witver, witprog, &witprog_len, hrp, valid_address[i].address);
|
||||
}
|
||||
ck_assert_int_eq(ret, 1);
|
||||
segwit_scriptpubkey(scriptpubkey, &scriptpubkey_len, witver, witprog, witprog_len);
|
||||
ck_assert_int_eq(scriptpubkey_len, valid_address[i].scriptPubKeyLen);
|
||||
ck_assert_int_eq(memcmp(scriptpubkey, valid_address[i].scriptPubKey, scriptpubkey_len), 0);
|
||||
ck_assert_int_eq(segwit_addr_encode(rebuild, hrp, witver, witprog, witprog_len), 1);
|
||||
ck_assert_int_eq(my_strncasecmp(valid_address[i].address, rebuild, 93), 0);
|
||||
}
|
||||
for (i = 0; i < sizeof(invalid_address) / sizeof(invalid_address[0]); ++i) {
|
||||
uint8_t witprog[40];
|
||||
size_t witprog_len;
|
||||
int witver;
|
||||
int ret = segwit_addr_decode(&witver, witprog, &witprog_len, "bc", invalid_address[i]);
|
||||
ck_assert_int_eq(ret, 0);
|
||||
ret = segwit_addr_decode(&witver, witprog, &witprog_len, "tb", invalid_address[i]);
|
||||
ck_assert_int_eq(ret, 0);
|
||||
}
|
||||
for (i = 0; i < sizeof(invalid_address_enc) / sizeof(invalid_address_enc[0]); ++i) {
|
||||
char rebuild[93];
|
||||
static const uint8_t program[42] = {0};
|
||||
int ret = segwit_addr_encode(rebuild, invalid_address_enc[i].hrp, invalid_address_enc[i].version, program, invalid_address_enc[i].program_length);
|
||||
ck_assert_int_eq(ret, 0);
|
||||
}
|
||||
}
|
||||
END_TEST
|
||||
|
Loading…
Reference in New Issue
Block a user