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Add support for bech32 addresses (BIP 173)

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pooler 2019-01-08 17:38:06 +01:00
parent 32464ebfc4
commit 7e8960212f
3 changed files with 134 additions and 2 deletions
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2
cpu-miner.c
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@ -135,7 +135,7 @@ static char *rpc_url;
static char *rpc_userpass;
static char *rpc_user, *rpc_pass;
static int pk_script_size;
static unsigned char pk_script[25];
static unsigned char pk_script[42];
static char coinbase_sig[101] = "";
char *opt_cert;
char *opt_proxy;

1
minerd.1
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@ -93,6 +93,7 @@ Only supported when using the HTTPS protocol.
Set a payout address for solo mining.
This is only used in getblocktemplate mode,
and only if the server does not provide a coinbase transaction.
It can be either a base-58 address, or a bech32 address (BIP 173).
.TP
\fB\-\-coinbase\-sig\fR=\fITEXT\fR
Set a string to be included in the coinbase (if allowed by the server).

133
util.c
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@ -2,6 +2,7 @@
* Copyright 2010 Jeff Garzik
* Copyright 2012 Luke Dashjr
* Copyright 2012-2017 pooler
* Copyright 2017 Pieter Wuille
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
@ -659,6 +660,136 @@ static int b58check(unsigned char *bin, size_t binsz, const char *b58)
return bin[0];
}
static uint32_t bech32_polymod_step(uint32_t pre) {
uint8_t b = pre >> 25;
return ((pre & 0x1FFFFFF) << 5) ^
(-((b >> 0) & 1) & 0x3b6a57b2UL) ^
(-((b >> 1) & 1) & 0x26508e6dUL) ^
(-((b >> 2) & 1) & 0x1ea119faUL) ^
(-((b >> 3) & 1) & 0x3d4233ddUL) ^
(-((b >> 4) & 1) & 0x2a1462b3UL);
}
static const int8_t bech32_charset_rev[128] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
15, -1, 10, 17, 21, 20, 26, 30, 7, 5, -1, -1, -1, -1, -1, -1,
-1, 29, -1, 24, 13, 25, 9, 8, 23, -1, 18, 22, 31, 27, 19, -1,
1, 0, 3, 16, 11, 28, 12, 14, 6, 4, 2, -1, -1, -1, -1, -1,
-1, 29, -1, 24, 13, 25, 9, 8, 23, -1, 18, 22, 31, 27, 19, -1,
1, 0, 3, 16, 11, 28, 12, 14, 6, 4, 2, -1, -1, -1, -1, -1
};
static bool bech32_decode(char *hrp, uint8_t *data, size_t *data_len, const char *input) {
uint32_t chk = 1;
size_t i;
size_t input_len = strlen(input);
size_t hrp_len;
int have_lower = 0, have_upper = 0;
if (input_len < 8 || input_len > 90) {
return false;
}
*data_len = 0;
while (*data_len < input_len && input[(input_len - 1) - *data_len] != '1') {
++(*data_len);
}
hrp_len = input_len - (1 + *data_len);
if (1 + *data_len >= input_len || *data_len < 6) {
return false;
}
*(data_len) -= 6;
for (i = 0; i < hrp_len; ++i) {
int ch = input[i];
if (ch < 33 || ch > 126) {
return false;
}
if (ch >= 'a' && ch <= 'z') {
have_lower = 1;
} else if (ch >= 'A' && ch <= 'Z') {
have_upper = 1;
ch = (ch - 'A') + 'a';
}
hrp[i] = ch;
chk = bech32_polymod_step(chk) ^ (ch >> 5);
}
hrp[i] = 0;
chk = bech32_polymod_step(chk);
for (i = 0; i < hrp_len; ++i) {
chk = bech32_polymod_step(chk) ^ (input[i] & 0x1f);
}
++i;
while (i < input_len) {
int v = (input[i] & 0x80) ? -1 : bech32_charset_rev[(int)input[i]];
if (input[i] >= 'a' && input[i] <= 'z') have_lower = 1;
if (input[i] >= 'A' && input[i] <= 'Z') have_upper = 1;
if (v == -1) {
return false;
}
chk = bech32_polymod_step(chk) ^ v;
if (i + 6 < input_len) {
data[i - (1 + hrp_len)] = v;
}
++i;
}
if (have_lower && have_upper) {
return false;
}
return chk == 1;
}
static bool convert_bits(uint8_t *out, size_t *outlen, int outbits, const uint8_t *in, size_t inlen, int inbits, int pad) {
uint32_t val = 0;
int bits = 0;
uint32_t maxv = (((uint32_t)1) << outbits) - 1;
while (inlen--) {
val = (val << inbits) | *(in++);
bits += inbits;
while (bits >= outbits) {
bits -= outbits;
out[(*outlen)++] = (val >> bits) & maxv;
}
}
if (pad) {
if (bits) {
out[(*outlen)++] = (val << (outbits - bits)) & maxv;
}
} else if (((val << (outbits - bits)) & maxv) || bits >= inbits) {
return false;
}
return true;
}
static bool segwit_addr_decode(int *witver, uint8_t *witdata, size_t *witdata_len, const char *addr) {
uint8_t data[84];
char hrp_actual[84];
size_t data_len;
if (!bech32_decode(hrp_actual, data, &data_len, addr)) return false;
if (data_len == 0 || data_len > 65) return false;
if (data[0] > 16) return false;
*witdata_len = 0;
if (!convert_bits(witdata, witdata_len, 8, data + 1, data_len - 1, 5, 0)) return false;
if (*witdata_len < 2 || *witdata_len > 40) return false;
if (data[0] == 0 && *witdata_len != 20 && *witdata_len != 32) return false;
*witver = data[0];
return true;
}
static size_t bech32_to_script(uint8_t *out, size_t outsz, const char *addr) {
uint8_t witprog[40];
size_t witprog_len;
int witver;
if (!segwit_addr_decode(&witver, witprog, &witprog_len, addr))
return 0;
if (outsz < witprog_len + 2)
return 0;
out[0] = witver ? (0x50 + witver) : 0;
out[1] = witprog_len;
memcpy(out + 2, witprog, witprog_len);
return witprog_len + 2;
}
size_t address_to_script(unsigned char *out, size_t outsz, const char *addr)
{
unsigned char addrbin[25];
@ -666,7 +797,7 @@ size_t address_to_script(unsigned char *out, size_t outsz, const char *addr)
size_t rv;
if (!b58dec(addrbin, sizeof(addrbin), addr))
return 0;
return bech32_to_script(out, outsz, addr);
addrver = b58check(addrbin, sizeof(addrbin), addr);
if (addrver < 0)
return 0;