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Added cashaddr support (#120)

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The new bitcoincash address format.
pull/25/head
Jochen Hoenicke 6 years ago committed by Pavol Rusnak
parent c61ab76ad7
commit e65adcf5ca
6 changed files with 384 additions and 6 deletions
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4
Makefile
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@ -50,7 +50,7 @@ SRCS += blake2b.c blake2s.c
SRCS += chacha20poly1305/chacha20poly1305.c chacha20poly1305/chacha_merged.c chacha20poly1305/poly1305-donna.c chacha20poly1305/rfc7539.c
SRCS += rc4.c
SRCS += nem.c
SRCS += segwit_addr.c
SRCS += segwit_addr.c cash_addr.c
SRCS += memzero.c
OBJS = $(SRCS:.c=.o)
@ -63,6 +63,8 @@ all: test_check test_openssl test_speed aes/aestst tools libtrezor-crypto.so
%.o: %.c %.h options.h
$(CC) $(CFLAGS) -o $@ -c $<
test_check.o: test_segwit.c test_cashaddr.c
aes/aestst: aes/aestst.o aes/aescrypt.o aes/aeskey.o aes/aestab.o
$(CC) $^ -o $@

187
cash_addr.c
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@ -0,0 +1,187 @@
/* Copyright (c) 2017 Jochen Hoenicke
* based on code Copyright (c) 2017 Peter Wuille
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "cash_addr.h"
#define MAX_CASHADDR_SIZE 129
#define MAX_BASE32_SIZE 104
#define MAX_DATA_SIZE 65
#define MAX_HRP_SIZE 20
#define CHECKSUM_SIZE 8
uint64_t cashaddr_polymod_step(uint64_t pre) {
uint8_t b = pre >> 35;
return ((pre & 0x7FFFFFFFFULL) << 5) ^
(-((b >> 0) & 1) & 0x98f2bc8e61ULL) ^
(-((b >> 1) & 1) & 0x79b76d99e2ULL) ^
(-((b >> 2) & 1) & 0xf33e5fb3c4ULL) ^
(-((b >> 3) & 1) & 0xae2eabe2a8ULL) ^
(-((b >> 4) & 1) & 0x1e4f43e470ULL);
}
static const char* charset = "qpzry9x8gf2tvdw0s3jn54khce6mua7l";
static const int8_t 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
};
int cash_encode(char *output, const char *hrp, const uint8_t *data, size_t data_len) {
uint64_t chk = 1;
size_t i = 0;
while (hrp[i] != 0) {
int ch = hrp[i];
if (ch < 33 || ch > 126) {
return 0;
}
*(output++) = ch;
chk = cashaddr_polymod_step(chk) ^ (ch & 0x1f);
++i;
}
if (i + 1 + data_len + CHECKSUM_SIZE > MAX_CASHADDR_SIZE) {
return 0;
}
chk = cashaddr_polymod_step(chk);
*(output++) = ':';
for (i = 0; i < data_len; ++i) {
if (*data >> 5) return 0;
chk = cashaddr_polymod_step(chk) ^ (*data);
*(output++) = charset[*(data++)];
}
for (i = 0; i < CHECKSUM_SIZE; ++i) {
chk = cashaddr_polymod_step(chk);
}
chk ^= 1;
for (i = 0; i < CHECKSUM_SIZE; ++i) {
*(output++) = charset[(chk >> ((CHECKSUM_SIZE - 1 - i) * 5)) & 0x1f];
}
*output = 0;
return 1;
}
int cash_decode(char* hrp, uint8_t *data, size_t *data_len, const char *input) {
uint64_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 < CHECKSUM_SIZE || input_len > MAX_CASHADDR_SIZE) {
return 0;
}
*data_len = 0;
while (*data_len < input_len && input[(input_len - 1) - *data_len] != ':') {
++(*data_len);
}
hrp_len = input_len - (1 + *data_len);
if (hrp_len < 1 || hrp_len > MAX_HRP_SIZE ||
*data_len < CHECKSUM_SIZE || *data_len > CHECKSUM_SIZE + MAX_BASE32_SIZE) {
return 0;
}
// subtract checksum
*(data_len) -= CHECKSUM_SIZE;
for (i = 0; i < hrp_len; ++i) {
int ch = input[i];
if (ch < 33 || ch > 126) {
return 0;
}
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 = cashaddr_polymod_step(chk) ^ (ch & 0x1f);
}
hrp[i] = 0;
chk = cashaddr_polymod_step(chk);
++i;
while (i < input_len) {
int v = (input[i] & 0x80) ? -1 : 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 0;
}
chk = cashaddr_polymod_step(chk) ^ v;
if (i + 6 < input_len) {
data[i - (1 + hrp_len)] = v;
}
++i;
}
if (have_lower && have_upper) {
return 0;
}
return chk == 1;
}
static int 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 0;
}
return 1;
}
int cash_addr_encode(char *output, const char *hrp, const uint8_t *data, size_t data_len) {
uint8_t base32[MAX_BASE32_SIZE];
size_t base32len = 0;
if (data_len < 2 || data_len > MAX_DATA_SIZE) return 0;
convert_bits(base32, &base32len, 5, data, data_len, 8, 1);
return cash_encode(output, hrp, base32, base32len);
}
int cash_addr_decode(uint8_t* witdata, size_t* witdata_len, const char* hrp, const char* addr) {
uint8_t data[MAX_BASE32_SIZE];
char hrp_actual[MAX_HRP_SIZE+1];
size_t data_len;
if (!cash_decode(hrp_actual, data, &data_len, addr)) return 0;
if (data_len == 0 || data_len > MAX_BASE32_SIZE) return 0;
if (strncmp(hrp, hrp_actual, MAX_HRP_SIZE + 1) != 0) return 0;
*witdata_len = 0;
if (!convert_bits(witdata, witdata_len, 8, data, data_len, 5, 0)) return 0;
if (*witdata_len < 2 || *witdata_len > MAX_DATA_SIZE) return 0;
return 1;
}

96
cash_addr.h
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@ -0,0 +1,96 @@
/* Copyright (c) 2017 Jochen Hoenicke, Pieter Wuille
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef _CASH_ADDR_H_
#define _CASH_ADDR_H_ 1
#include <stdint.h>
/** Encode a Cashaddr address
*
* Out: output: Pointer to a buffer of size 105 + strlen(hrp) that will be
* updated to contain the null-terminated address.
* In: hrp: Pointer to the null-terminated human readable part to use
* (chain/network specific).
* prog: Data bytes for the hash (between 21 and 65 bytes).
* prog_len: Number of data bytes in prog.
* Returns 1 if successful.
*/
int cash_addr_encode(
char *output,
const char *hrp,
const uint8_t *prog,
size_t prog_len
);
/** Decode a CashAddr address
*
* Out: prog: Pointer to a buffer of size 65 that will be updated to
* contain the witness program bytes.
* prog_len: Pointer to a size_t that will be updated to contain the length
* of bytes in prog.
* hrp: Pointer to the null-terminated human readable part that is
* expected (chain/network specific).
* addr: Pointer to the null-terminated address.
* Returns 1 if successful.
*/
int cash_addr_decode(
uint8_t* prog,
size_t* prog_len,
const char* hrp,
const char* addr
);
/** Encode a Cash string
*
* Out: output: Pointer to a buffer of size strlen(hrp) + data_len + 8 that
* will be updated to contain the null-terminated Cash string.
* In: hrp : Pointer to the null-terminated human readable part.
* data : Pointer to an array of 5-bit values.
* data_len: Length of the data array.
* Returns 1 if successful.
*/
int cash_encode(
char *output,
const char *hrp,
const uint8_t *data,
size_t data_len
);
/** Decode a Cash string
*
* Out: hrp: Pointer to a buffer of size strlen(input) - 6. Will be
* updated to contain the null-terminated human readable part.
* data: Pointer to a buffer of size strlen(input) - 8 that will
* hold the encoded 5-bit data values.
* data_len: Pointer to a size_t that will be updated to be the number
* of entries in data.
* In: input: Pointer to a null-terminated Cash string.
* Returns 1 if succesful.
*/
int cash_decode(
char *hrp,
uint8_t *data,
size_t *data_len,
const char *input
);
#endif

12
ecdsa.h
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@ -50,11 +50,13 @@ typedef struct {
} ecdsa_curve;
// 4 byte prefix + 40 byte data (segwit)
#define MAX_ADDR_RAW_SIZE (4 + 40)
// bottle neck is segwit bech32:
// 4 human readable prefix + 1 separator + 64 data + 6 checksum + 1 NUL
// the standard says 83 characters in hrp, but currently all coins use max 4
#define MAX_ADDR_SIZE (4 + 1 + 64 + 6 + 1)
// 1 byte prefix + 64 byte data (cashaddr)
#define MAX_ADDR_RAW_SIZE 65
// bottle neck is cashaddr
// segwit is at most 90 characters plus NUL separator
// cashaddr: human readable prefix + 1 separator + 104 data + 8 checksum + 1 NUL
// we choose 130 as maximum (including NUL character)
#define MAX_ADDR_SIZE 130
// 4 byte prefix + 32 byte privkey + 1 byte compressed marker
#define MAX_WIF_RAW_SIZE (4 + 32 + 1)
// (4 + 32 + 1 + 4 [checksum]) * 8 / log2(58) plus NUL.

86
test_cashaddr.c
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@ -0,0 +1,86 @@
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <check.h>
#include "cash_addr.h"
static const char* valid_cashchecksum[] = {
"prefix:x64nx6hz",
"p:gpf8m4h7",
"bitcoincash:qpzry9x8gf2tvdw0s3jn54khce6mua7lcw20ayyn",
"bchtest:testnetaddress4d6njnut",
"bchreg:555555555555555555555555555555555555555555555udxmlmrz",
};
struct valid_cashaddr_data {
const char* legacy;
const char* cashaddress;
};
static struct valid_cashaddr_data valid_cashaddr[] = {
{
"1BpEi6DfDAUFd7GtittLSdBeYJvcoaVggu",
"bitcoincash:qpm2qsznhks23z7629mms6s4cwef74vcwvy22gdx6a"
},
{
"1KXrWXciRDZUpQwQmuM1DbwsKDLYAYsVLR",
"bitcoincash:qr95sy3j9xwd2ap32xkykttr4cvcu7as4y0qverfuy"
},
{
"16w1D5WRVKJuZUsSRzdLp9w3YGcgoxDXb",
"bitcoincash:qqq3728yw0y47sqn6l2na30mcw6zm78dzqre909m2r"
},
{
"3CWFddi6m4ndiGyKqzYvsFYagqDLPVMTzC",
"bitcoincash:ppm2qsznhks23z7629mms6s4cwef74vcwvn0h829pq"
},
{
"3LDsS579y7sruadqu11beEJoTjdFiFCdX4",
"bitcoincash:pr95sy3j9xwd2ap32xkykttr4cvcu7as4yc93ky28e"
},
{
"31nwvkZwyPdgzjBJZXfDmSWsC4ZLKpYyUw",
"bitcoincash:pqq3728yw0y47sqn6l2na30mcw6zm78dzq5ucqzc37"
}
};
START_TEST(test_cashaddr)
{
size_t i;
for (i = 0; i < sizeof(valid_cashchecksum) / sizeof(valid_cashchecksum[0]); ++i) {
uint8_t data[82];
char rebuild[92];
char hrp[84];
size_t data_len;
int res = cash_decode(hrp, data, &data_len, valid_cashchecksum[i]);
ck_assert_int_eq(res, 1);
res = cash_encode(rebuild, hrp, data, data_len);
ck_assert_int_eq(res, 1);
printf("%s\n", rebuild);
printf("%s\n", valid_cashchecksum[i]);
ck_assert_int_eq(my_strncasecmp(rebuild, valid_cashchecksum[i], 92), 0);
}
for (i = 0; i < sizeof(valid_cashaddr) / sizeof(valid_cashaddr[0]); ++i) {
uint8_t prog[65];
size_t prog_len;
const char* hrp = "bitcoincash";
uint8_t rawdata[65];
size_t rawdata_len;
char rebuild[93];
int ret = cash_addr_decode(prog, &prog_len, hrp, valid_cashaddr[i].cashaddress);
ck_assert_int_eq(ret, 1);
ck_assert_int_eq(prog_len, 21);
rawdata_len = base58_decode_check(valid_cashaddr[i].legacy, HASHER_SHA2, rawdata, sizeof(rawdata));
ck_assert_int_eq(rawdata_len, 21);
ck_assert_int_eq(prog[0], rawdata[0] == 0 ? 0x00 : rawdata[0] == 5 ? 0x08 : -1);
ck_assert_int_eq(memcmp(rawdata + 1, prog + 1, 20), 0);
ret = cash_addr_encode(rebuild, hrp, prog, 21);
ck_assert_int_eq(ret, 1);
printf("%s\n", rebuild);
printf("%s\n", valid_cashaddr[i].cashaddress);
ck_assert_int_eq(my_strncasecmp(rebuild, valid_cashaddr[i].cashaddress, 92), 0);
}
}
END_TEST

5
test_check.c
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@ -4404,6 +4404,7 @@ START_TEST(test_rc4_rfc6229)
END_TEST
#include "test_segwit.c"
#include "test_cashaddr.c"
// define test suite and cases
Suite *test_suite(void)
@ -4631,6 +4632,10 @@ Suite *test_suite(void)
tcase_add_test(tc, test_segwit);
suite_add_tcase(s, tc);
tc = tcase_create("cashaddr");
tcase_add_test(tc, test_cashaddr);
suite_add_tcase(s, tc);
return s;
}

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