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pattern.c
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pattern.c
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/*
* Vanitygen, vanity bitcoin address generator
* Copyright (C) 2011 <samr7@cs.washington.edu>
*
* Vanitygen is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* Vanitygen is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Vanitygen. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <assert.h>
#include <pthread.h>
#include <openssl/sha.h>
#include <openssl/ripemd.h>
#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/obj_mac.h>
#include <pcre.h>
#include "ticker.h"
#include "pattern.h"
#include "util.h"
#include "avl.h"
#include "sha3.h"
/*
* Common code for execution helper
*/
EC_KEY *
vg_exec_context_new_key(void)
{
return EC_KEY_new_by_curve_name(NID_secp256k1);
}
/*
* Thread synchronization helpers
*/
static pthread_mutex_t vg_thread_lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t vg_thread_rdcond = PTHREAD_COND_INITIALIZER;
static pthread_cond_t vg_thread_wrcond = PTHREAD_COND_INITIALIZER;
static pthread_cond_t vg_thread_upcond = PTHREAD_COND_INITIALIZER;
static void
__vg_exec_context_yield(vg_exec_context_t *vxcp)
{
vxcp->vxc_lockmode = 0;
while (vxcp->vxc_vc->vc_thread_excl) {
if (vxcp->vxc_stop) {
assert(vxcp->vxc_vc->vc_thread_excl);
vxcp->vxc_stop = 0;
pthread_cond_signal(&vg_thread_upcond);
}
pthread_cond_wait(&vg_thread_rdcond, &vg_thread_lock);
}
assert(!vxcp->vxc_stop);
assert(!vxcp->vxc_lockmode);
vxcp->vxc_lockmode = 1;
}
int
vg_exec_context_upgrade_lock(vg_exec_context_t *vxcp)
{
vg_exec_context_t *tp;
vg_context_t *vcp;
if (vxcp->vxc_lockmode == 2)
return 0;
pthread_mutex_lock(&vg_thread_lock);
assert(vxcp->vxc_lockmode == 1);
vxcp->vxc_lockmode = 0;
vcp = vxcp->vxc_vc;
if (vcp->vc_thread_excl++) {
assert(vxcp->vxc_stop);
vxcp->vxc_stop = 0;
pthread_cond_signal(&vg_thread_upcond);
pthread_cond_wait(&vg_thread_wrcond, &vg_thread_lock);
for (tp = vcp->vc_threads; tp != NULL; tp = tp->vxc_next) {
assert(!tp->vxc_lockmode);
assert(!tp->vxc_stop);
}
} else {
for (tp = vcp->vc_threads; tp != NULL; tp = tp->vxc_next) {
if (tp->vxc_lockmode) {
assert(tp->vxc_lockmode != 2);
tp->vxc_stop = 1;
}
}
do {
for (tp = vcp->vc_threads;
tp != NULL;
tp = tp->vxc_next) {
if (tp->vxc_lockmode) {
assert(tp->vxc_lockmode != 2);
pthread_cond_wait(&vg_thread_upcond,
&vg_thread_lock);
break;
}
}
} while (tp);
}
vxcp->vxc_lockmode = 2;
pthread_mutex_unlock(&vg_thread_lock);
return 1;
}
void
vg_exec_context_downgrade_lock(vg_exec_context_t *vxcp)
{
pthread_mutex_lock(&vg_thread_lock);
assert(vxcp->vxc_lockmode == 2);
assert(!vxcp->vxc_stop);
if (!--vxcp->vxc_vc->vc_thread_excl) {
vxcp->vxc_lockmode = 1;
pthread_cond_broadcast(&vg_thread_rdcond);
pthread_mutex_unlock(&vg_thread_lock);
return;
}
pthread_cond_signal(&vg_thread_wrcond);
__vg_exec_context_yield(vxcp);
pthread_mutex_unlock(&vg_thread_lock);
}
int
vg_exec_context_init(vg_context_t *vcp, vg_exec_context_t *vxcp)
{
pthread_mutex_lock(&vg_thread_lock);
memset(vxcp, 0, sizeof(*vxcp));
vxcp->vxc_vc = vcp;
vxcp->vxc_bntarg = BN_new();
vxcp->vxc_bnbase = BN_new();
vxcp->vxc_bntmp = BN_new();
vxcp->vxc_bntmp2 = BN_new();
BN_set_word(vxcp->vxc_bnbase, 58);
vxcp->vxc_bnctx = BN_CTX_new();
assert(vxcp->vxc_bnctx);
vxcp->vxc_key = vg_exec_context_new_key();
assert(vxcp->vxc_key);
EC_KEY_precompute_mult(vxcp->vxc_key, vxcp->vxc_bnctx);
vxcp->vxc_lockmode = 0;
vxcp->vxc_stop = 0;
vxcp->vxc_next = vcp->vc_threads;
vcp->vc_threads = vxcp;
__vg_exec_context_yield(vxcp);
pthread_mutex_unlock(&vg_thread_lock);
return 1;
}
void
vg_exec_context_del(vg_exec_context_t *vxcp)
{
vg_exec_context_t *tp, **pprev;
if (vxcp->vxc_lockmode == 2)
vg_exec_context_downgrade_lock(vxcp);
pthread_mutex_lock(&vg_thread_lock);
assert(vxcp->vxc_lockmode == 1);
vxcp->vxc_lockmode = 0;
for (pprev = &vxcp->vxc_vc->vc_threads, tp = *pprev;
(tp != vxcp) && (tp != NULL);
pprev = &tp->vxc_next, tp = *pprev);
assert(tp == vxcp);
*pprev = tp->vxc_next;
if (tp->vxc_stop)
pthread_cond_signal(&vg_thread_upcond);
BN_clear_free(vxcp->vxc_bntarg);
BN_clear_free(vxcp->vxc_bnbase);
BN_clear_free(vxcp->vxc_bntmp);
BN_clear_free(vxcp->vxc_bntmp2);
BN_CTX_free(vxcp->vxc_bnctx);
vxcp->vxc_bnctx = NULL;
pthread_mutex_unlock(&vg_thread_lock);
}
void
vg_exec_context_yield(vg_exec_context_t *vxcp)
{
if (vxcp->vxc_lockmode == 2)
vg_exec_context_downgrade_lock(vxcp);
else if (vxcp->vxc_stop) {
assert(vxcp->vxc_lockmode == 1);
pthread_mutex_lock(&vg_thread_lock);
__vg_exec_context_yield(vxcp);
pthread_mutex_unlock(&vg_thread_lock);
}
assert(vxcp->vxc_lockmode == 1);
}
void
vg_exec_context_consolidate_key(vg_exec_context_t *vxcp)
{
if (vxcp->vxc_delta) {
BN_clear(vxcp->vxc_bntmp);
BN_set_word(vxcp->vxc_bntmp, vxcp->vxc_delta);
BN_add(vxcp->vxc_bntmp2,
EC_KEY_get0_private_key(vxcp->vxc_key),
vxcp->vxc_bntmp);
vg_set_privkey(vxcp->vxc_bntmp2, vxcp->vxc_key);
vxcp->vxc_delta = 0;
}
}
void
vg_exec_context_calc_address(vg_exec_context_t *vxcp)
{
EC_POINT *pubkey;
const EC_GROUP *pgroup;
unsigned char eckey_buf[96], hash1[32], hash2[20];
int len;
vg_exec_context_consolidate_key(vxcp);
pgroup = EC_KEY_get0_group(vxcp->vxc_key);
pubkey = EC_POINT_new(pgroup);
EC_POINT_copy(pubkey, EC_KEY_get0_public_key(vxcp->vxc_key));
if (vxcp->vxc_vc->vc_pubkey_base) {
EC_POINT_add(pgroup,
pubkey,
pubkey,
vxcp->vxc_vc->vc_pubkey_base,
vxcp->vxc_bnctx);
}
len = EC_POINT_point2oct(pgroup,
pubkey,
vxcp->vxc_vc->vc_compressed ? POINT_CONVERSION_COMPRESSED : POINT_CONVERSION_UNCOMPRESSED,
eckey_buf,
sizeof(eckey_buf),
vxcp->vxc_bnctx);
if (vxcp->vxc_vc->vc_addrtype == ADDR_TYPE_ETH) {
// Save ETH address into vxcp->vxc_binres
eth_pubkey2addr(eckey_buf, vxcp->vxc_vc->vc_format, vxcp->vxc_binres);
} else if (TRXFlag == 1) {
// See: https://secretscan.org/PrivateKeyTron
SHA3_256(hash1, eckey_buf + 1, 64); // skip 1 byte (the leading 0x04) in uncompressed public key
memcpy(&vxcp->vxc_binres[1], hash1 + 12, 20); // skip first 12 bytes in public key hash
} else {
SHA256(eckey_buf, len, hash1);
RIPEMD160(hash1, sizeof(hash1), hash2);
memcpy(&vxcp->vxc_binres[1], hash2, 20);
}
EC_POINT_free(pubkey);
}
enum {
timing_hist_size = 5
};
typedef struct _timing_info_s {
struct _timing_info_s *ti_next;
pthread_t ti_thread;
unsigned long ti_last_rate;
unsigned long long ti_hist_time[timing_hist_size];
unsigned long ti_hist_work[timing_hist_size];
int ti_hist_last;
} timing_info_t;
static pthread_mutex_t timing_mutex = PTHREAD_MUTEX_INITIALIZER;
int
vg_output_timing(vg_context_t *vcp, int cycle, struct timeval *last)
{
pthread_t me;
struct timeval tvnow, tv;
timing_info_t *tip, *mytip;
unsigned long long rate, myrate = 0, mytime, total, sincelast;
int p, i;
/* Compute the rate */
gettimeofday(&tvnow, NULL);
timersub(&tvnow, last, &tv);
memcpy(last, &tvnow, sizeof(*last));
mytime = tv.tv_usec + (1000000ULL * tv.tv_sec);
if (!mytime)
mytime = 1;
rate = 0;
pthread_mutex_lock(&timing_mutex);
me = pthread_self();
for (tip = vcp->vc_timing_head, mytip = NULL;
tip != NULL; tip = tip->ti_next) {
if (pthread_equal(tip->ti_thread, me)) {
mytip = tip;
p = ((tip->ti_hist_last + 1) % timing_hist_size);
tip->ti_hist_time[p] = mytime;
tip->ti_hist_work[p] = cycle;
tip->ti_hist_last = p;
mytime = 0;
myrate = 0;
for (i = 0; i < timing_hist_size; i++) {
mytime += tip->ti_hist_time[i];
myrate += tip->ti_hist_work[i];
}
myrate = (myrate * 1000000) / mytime;
tip->ti_last_rate = myrate;
rate += myrate;
} else
rate += tip->ti_last_rate;
}
if (!mytip) {
mytip = (timing_info_t *) malloc(sizeof(*tip));
mytip->ti_next = vcp->vc_timing_head;
mytip->ti_thread = me;
vcp->vc_timing_head = mytip;
mytip->ti_hist_last = 0;
mytip->ti_hist_time[0] = mytime;
mytip->ti_hist_work[0] = cycle;
for (i = 1; i < timing_hist_size; i++) {
mytip->ti_hist_time[i] = 1;
mytip->ti_hist_work[i] = 0;
}
myrate = ((unsigned long long)cycle * 1000000) / mytime;
mytip->ti_last_rate = myrate;
rate += myrate;
}
vcp->vc_timing_total += cycle;
if (vcp->vc_timing_prevfound != vcp->vc_found) {
vcp->vc_timing_prevfound = vcp->vc_found;
vcp->vc_timing_sincelast = 0;
}
vcp->vc_timing_sincelast += cycle;
if (mytip != vcp->vc_timing_head) {
pthread_mutex_unlock(&timing_mutex);
return myrate;
}
total = vcp->vc_timing_total;
sincelast = vcp->vc_timing_sincelast;
pthread_mutex_unlock(&timing_mutex);
vcp->vc_output_timing(vcp, sincelast, rate, total);
return myrate;
}
void
vg_context_thread_exit(vg_context_t *vcp)
{
timing_info_t *tip, **ptip;
pthread_t me;
pthread_mutex_lock(&timing_mutex);
me = pthread_self();
for (ptip = &vcp->vc_timing_head, tip = *ptip;
tip != NULL;
ptip = &tip->ti_next, tip = *ptip) {
if (!pthread_equal(tip->ti_thread, me))
continue;
*ptip = tip->ti_next;
free(tip);
break;
}
pthread_mutex_unlock(&timing_mutex);
}
static void
vg_timing_info_free(vg_context_t *vcp)
{
timing_info_t *tp;
while (vcp->vc_timing_head != NULL) {
tp = vcp->vc_timing_head;
vcp->vc_timing_head = tp->ti_next;
free(tp);
}
}
void
vg_output_timing_console(vg_context_t *vcp, double count,
unsigned long long rate, unsigned long long total)
{
double prob, time, targ;
char *unit;
char linebuf[80];
int rem, p, i;
const double targs[] = { 0.5, 0.75, 0.8, 0.9, 0.95, 1.0 };
targ = rate;
unit = "key/s";
if (targ > 1000) {
unit = "Kkey/s";
targ /= 1000.0;
if (targ > 1000) {
unit = "Mkey/s";
targ /= 1000.0;
}
}
rem = sizeof(linebuf);
p = snprintf(linebuf, rem, "[%.2f %s][total %lld]",
targ, unit, total);
assert(p > 0);
rem -= p;
if (rem < 0)
rem = 0;
if (vcp->vc_chance >= 1.0) {
prob = 1.0f - exp(-count/vcp->vc_chance);
if (prob <= 0.999) {
p = snprintf(&linebuf[p], rem, "[Prob %.1f%%]",
prob * 100);
assert(p > 0);
rem -= p;
if (rem < 0)
rem = 0;
p = sizeof(linebuf) - rem;
}
for (i = 0; i < sizeof(targs)/sizeof(targs[0]); i++) {
targ = targs[i];
if ((targ < 1.0) && (prob <= targ))
break;
}
if (targ < 1.0) {
time = ((-vcp->vc_chance * log(1.0 - targ)) - count) /
rate;
unit = "s";
if (time > 60) {
time /= 60;
unit = "min";
if (time > 60) {
time /= 60;
unit = "h";
if (time > 24) {
time /= 24;
unit = "d";
if (time > 365) {
time /= 365;
unit = "y";
}
}
}
}
if (time > 1000000) {
p = snprintf(&linebuf[p], rem,
"[%d%% in %e%s]",
(int) (100 * targ), time, unit);
} else {
p = snprintf(&linebuf[p], rem,
"[%d%% in %.1f%s]",
(int) (100 * targ), time, unit);
}
assert(p > 0);
rem -= p;
if (rem < 0)
rem = 0;
p = sizeof(linebuf) - rem;
}
}
if (vcp->vc_found) {
if (vcp->vc_remove_on_match)
p = snprintf(&linebuf[p], rem, "[Found %lld/%ld]",
vcp->vc_found, vcp->vc_npatterns_start);
else
p = snprintf(&linebuf[p], rem, "[Found %lld]",
vcp->vc_found);
assert(p > 0);
rem -= p;
if (rem < 0)
rem = 0;
}
if (rem) {
memset(&linebuf[sizeof(linebuf)-rem], 0x20, rem);
linebuf[sizeof(linebuf)-1] = '\0';
}
printf("\r%s", linebuf);
fflush(stdout);
}
void
vg_output_match_console(vg_context_t *vcp, EC_KEY *pkey, const char *pattern)
{
unsigned char key_buf[512], *pend;
char addr_buf[64], addr2_buf[64];
char privkey_buf[VG_PROTKEY_MAX_B58];
const char *keytype = "Privkey";
int len;
int isscript = (vcp->vc_format == VCF_SCRIPT);
EC_POINT *ppnt;
int free_ppnt = 0;
if (vcp->vc_pubkey_base) {
ppnt = EC_POINT_new(EC_KEY_get0_group(pkey));
EC_POINT_copy(ppnt, EC_KEY_get0_public_key(pkey));
EC_POINT_add(EC_KEY_get0_group(pkey),
ppnt,
ppnt,
vcp->vc_pubkey_base,
NULL);
free_ppnt = 1;
keytype = "PrivkeyPart";
} else {
ppnt = (EC_POINT *) EC_KEY_get0_public_key(pkey);
}
assert(EC_KEY_check_key(pkey));
if (vcp->vc_compressed)
vg_encode_address_compressed(ppnt,
EC_KEY_get0_group(pkey),
vcp->vc_pubkeytype, addr_buf);
else
vg_encode_address(ppnt,
EC_KEY_get0_group(pkey),
vcp->vc_pubkeytype, vcp->vc_format, addr_buf);
if (isscript)
vg_encode_script_address(ppnt,
EC_KEY_get0_group(pkey),
vcp->vc_addrtype, addr2_buf);
if (vcp->vc_key_protect_pass) {
len = vg_protect_encode_privkey(privkey_buf,
pkey, vcp->vc_privtype,
VG_PROTKEY_DEFAULT,
vcp->vc_key_protect_pass);
if (len) {
keytype = "Protkey";
} else {
fprintf(stderr,
"ERROR: could not password-protect key\n");
vcp->vc_key_protect_pass = NULL;
}
}
if (!vcp->vc_key_protect_pass) {
if (vcp->vc_compressed)
vg_encode_privkey_compressed(pkey, vcp->vc_privtype, privkey_buf);
else
vg_encode_privkey(pkey, vcp->vc_privtype, privkey_buf);
}
int tickerlength=0;
if (vcp->vc_csv) {
if (strcmp(ticker, "")==0) {
strcpy(ticker, "BTC ");
}
tickerlength=(strlen(ticker)-1);
}
if (!vcp->vc_result_file || (vcp->vc_verbose > 0)) {
if (vcp->vc_csv) {
printf("\r%79s\r%.*s,%s,", "", tickerlength, ticker, pattern);
}
else {
printf("\r%79s\r%sPattern: %s\n", "", ticker, pattern);
}
}
if (vcp->vc_verbose > 0) {
if (vcp->vc_verbose > 1&&!(vcp->vc_csv)) {
pend = key_buf;
len = i2o_ECPublicKey(pkey, &pend);
printf("Pubkey (hex): ");
dumphex(key_buf, len);
printf("Privkey (hex): ");
dumpbn(EC_KEY_get0_private_key(pkey));
pend = key_buf;
len = i2d_ECPrivateKey(pkey, &pend);
printf("Privkey (ASN1): ");
dumphex(key_buf, len);
}
}
if (!vcp->vc_result_file || (vcp->vc_verbose > 0)) {
if (vcp->vc_csv) {
if (isscript) {
printf(
"%s,",
addr2_buf);
}
else {
printf(
"%s,",
addr_buf);
}
printf(
"%s\n",
privkey_buf);
}
else {
if (isscript)
printf("P2SH%s Address: %s\n", ticker, addr2_buf);
printf("%sAddress: %s\n"
"%s%s: %s\n",
ticker, addr_buf, ticker, keytype, privkey_buf);
}
}
if (vcp->vc_result_file) {
FILE *fp = fopen(vcp->vc_result_file, "a");
if (!fp) {
fprintf(stderr,
"ERROR: could not open result file: %s\n",
strerror(errno));
} else {
if (vcp->vc_csv) {
fprintf(fp,
"%.*s,%s,",
tickerlength,ticker, pattern);
if (isscript) {
fprintf(fp,
"%s,",
addr2_buf);
}
else {
fprintf(fp,
"%s,",
addr_buf);
}
fprintf(fp,
"%s\n",
privkey_buf);
fclose(fp);
}
else {
fprintf(fp,
"%sPattern: %s\n"
, ticker, pattern);
if (isscript)
fprintf(fp, "P2SH%s Address: %s\n", ticker, addr2_buf);
fprintf(fp,
"%sAddress: %s\n"
"%s%s: %s\n",
ticker, addr_buf, ticker, keytype, privkey_buf);
fclose(fp);
}
}
}
if (free_ppnt)
EC_POINT_free(ppnt);
}
void
vg_context_free(vg_context_t *vcp)
{
vg_timing_info_free(vcp);
vcp->vc_free(vcp);
}
int
vg_context_add_patterns(vg_context_t *vcp,
const char ** const patterns, int npatterns)
{
vcp->vc_pattern_generation++;
return vcp->vc_add_patterns(vcp, patterns, npatterns);
}
void
vg_context_clear_all_patterns(vg_context_t *vcp)
{
vcp->vc_clear_all_patterns(vcp);
vcp->vc_pattern_generation++;
}
int
vg_context_addr_sort(vg_context_t *vcp, void *buf)
{
if (!vcp->vc_addr_sort)
return 0;
return vcp->vc_addr_sort(vcp, buf);
}
int
vg_context_start_threads(vg_context_t *vcp)
{
vg_exec_context_t *vxcp;
int res;
for (vxcp = vcp->vc_threads; vxcp != NULL; vxcp = vxcp->vxc_next) {
res = pthread_create((pthread_t *) &vxcp->vxc_pthread,
NULL,
(void *(*)(void *)) vxcp->vxc_threadfunc,
vxcp);
if (res) {
fprintf(stderr, "ERROR: could not create thread: %d\n",
res);
vg_context_stop_threads(vcp);
return -1;
}
if (vcp->vc_verbose > 0) {
fprintf(stderr, "create thread!\n");
}
vxcp->vxc_thread_active = 1;
}
return 0;
}
void
vg_context_stop_threads(vg_context_t *vcp)
{
vcp->vc_halt = 1;
vg_context_wait_for_completion(vcp);
vcp->vc_halt = 0;
}
void
vg_context_wait_for_completion(vg_context_t *vcp)
{
vg_exec_context_t *vxcp;
for (vxcp = vcp->vc_threads; vxcp != NULL; vxcp = vxcp->vxc_next) {
if (!vxcp->vxc_thread_active)
continue;
pthread_join((pthread_t) vxcp->vxc_pthread, NULL);
vxcp->vxc_thread_active = 0;
}
}
/*
* Find the bignum ranges that produce a given prefix.
*
* For ETH, if address (hex) pfx = "0xAA", then:
* result[0] = AA00000000000000000000000000000000000000
* result[1] = AAFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
*
* For BTC, if address (base58check) pfx = "12", then:
* result[0] = 0AF820335D9B3D9CF58B911D87035677FB7F528100000000
* result[1] = 15F04066BB367B39EB17223B0E06ACEFF6FEA501FFFFFFFF
* \_________________ ___________________/ |
* \/ |
* [ripemd160_hash] [checksum (not set)]
*/
static int
get_prefix_ranges(int addrtype, const char *pfx, BIGNUM **result,
BN_CTX *bnctx)
{
int i, p, c;
int zero_prefix = 0;
int check_upper = 0;
int b58pow, b58ceil, b58top = 0;
int ret = -1;
BIGNUM *bntarg, *bnceil, *bnfloor;
BIGNUM *bnbase;
BIGNUM *bnap, *bnbp, *bntp;
BIGNUM *bnhigh = NULL, *bnlow = NULL, *bnhigh2 = NULL, *bnlow2 = NULL;
BIGNUM *bntmp, *bntmp2;
bntarg = BN_new();
bnceil = BN_new();
bnfloor = BN_new();
bnbase = BN_new();
bntmp = BN_new();
bntmp2 = BN_new();
p = strlen(pfx);
// For ETH
if (addrtype == ADDR_TYPE_ETH) {
size_t ethkeylen = 20;
uint8_t upbin[64], lowbin[64], binres[64];
memset(lowbin, 0, sizeof(lowbin));
memset(upbin, 0xff, sizeof(upbin));
int pfx_len = strlen(pfx);
char pfx_with_padding[40]; // padding with '0'
memset(pfx_with_padding, 48, sizeof(pfx_with_padding)); // decimal 48 = char '0'
if (pfx_len >= 2 && pfx[0] == '0' && (pfx[1] == 'x' || pfx[1] == 'X')) { // with leading 0x
pfx_len = pfx_len - strlen("0x");
memcpy(pfx_with_padding, pfx + 2, pfx_len);
} else { // without leading 0x
memcpy(pfx_with_padding, pfx, pfx_len);
}
// Function hex_dec only handles the hex string with even length (e.g. 0xAA, 0xAAAA),
// In order to process hex string with odd length (e.g. 0xA, 0xAAA), we pad it first.
// Some examples:
// If pfx = 0xA, then pfx_with_padding = A000000000000000000000000000000000000000
// If pfx = 0xAA, then pfx_with_padding = AA00000000000000000000000000000000000000
// If pfx = 0xAAA, then pfx_with_padding = AAA0000000000000000000000000000000000000
// If pfx = 0xAAAA, then pfx_with_padding = AAAA000000000000000000000000000000000000
size_t bLen = ethkeylen;
if (hex_dec(binres, &bLen, pfx_with_padding, sizeof(pfx_with_padding)) < 0) {
fprintf(stderr, "Invalid eth address prefix (%s)\n", pfx);
goto out;
}
copy_nbits(upbin, binres, 4 * pfx_len);
copy_nbits(lowbin, binres, 4 * pfx_len);
bnlow = BN_new();
bnhigh = BN_new();
BN_bin2bn(lowbin, ethkeylen, bnlow);
BN_bin2bn(upbin, ethkeylen, bnhigh);
// printf("bnlow=");
// dumpbn(bnlow);
// printf("bnhigh=");
// dumpbn(bnhigh);
result[0] = bnlow; // bnlow=1200000000000000000000000000000000000000 if pfx=0x12
result[1] = bnhigh; // bnhigh=12FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF if pfx=0x12
result[2] = NULL;
result[3] = NULL;
bnlow = NULL;
bnhigh = NULL;
ret = 0;
return ret;
}
BN_set_word(bnbase, 58);
for (i = 0; i < p; i++) {
c = vg_b58_reverse_map[(int)pfx[i]];
if (c == -1) {
fprintf(stderr,
"Invalid character '%c' in prefix '%s'\n",
pfx[i], pfx);
goto out;
}
if (i == zero_prefix) {
if (c == 0) {
/* Add another zero prefix */
zero_prefix++;
if (zero_prefix > 19) {
fprintf(stderr,
"Prefix '%s' is too long, lets try it anyways!\n",
pfx);
/* goto out; */
}
continue;
}
/* First non-zero character */
b58top = c;
BN_set_word(bntarg, c);
} else {
BN_set_word(bntmp2, c);
BN_mul(bntmp, bntarg, bnbase, bnctx);
BN_add(bntarg, bntmp, bntmp2);
}
}
/* Power-of-two ceiling and floor values based on leading 1s */
BN_clear(bntmp);
BN_set_bit(bntmp, 200 - (zero_prefix * 8));
BN_sub(bnceil, bntmp, BN_value_one());
BN_set_bit(bnfloor, 192 - (zero_prefix * 8));
bnlow = BN_new();
bnhigh = BN_new();
if (b58top) {
/*
* If a non-zero was given in the prefix, find the
* numeric boundaries of the prefix.
*/
BN_copy(bntmp, bnceil);
bnap = bntmp;
bnbp = bntmp2;
b58pow = 0;
while (BN_cmp(bnap, bnbase) > 0) {
b58pow++;
BN_div(bnbp, NULL, bnap, bnbase, bnctx);
bntp = bnap;
bnap = bnbp;
bnbp = bntp;
}
b58ceil = BN_get_word(bnap);
if ((b58pow - (p - zero_prefix)) < 6) {
/*
* Do not allow the prefix to constrain the
* check value, this is ridiculous.
*/
fprintf(stderr, "Prefix '%s' is too long, lets try it anyways!\n", pfx);
/* goto out; */
}
BN_set_word(bntmp2, b58pow - (p - zero_prefix));
BN_exp(bntmp, bnbase, bntmp2, bnctx);
BN_mul(bnlow, bntmp, bntarg, bnctx);
BN_sub(bntmp2, bntmp, BN_value_one());
BN_add(bnhigh, bnlow, bntmp2);
if (b58top <= b58ceil) {
/* Fill out the upper range too */
check_upper = 1;
bnlow2 = BN_new();
bnhigh2 = BN_new();
BN_mul(bnlow2, bnlow, bnbase, bnctx);
BN_mul(bntmp2, bnhigh, bnbase, bnctx);
BN_set_word(bntmp, 57);
BN_add(bnhigh2, bntmp2, bntmp);
/*
* Addresses above the ceiling will have one
* fewer "1" prefix in front than we require.
*/
if (BN_cmp(bnceil, bnlow2) < 0) {
/* High prefix is above the ceiling */
check_upper = 0;
BN_free(bnhigh2);
bnhigh2 = NULL;
BN_free(bnlow2);
bnlow2 = NULL;
}
else if (BN_cmp(bnceil, bnhigh2) < 0)
/* High prefix is partly above the ceiling */
BN_copy(bnhigh2, bnceil);
/*
* Addresses below the floor will have another
* "1" prefix in front instead of our target.
*/
if (BN_cmp(bnfloor, bnhigh) >= 0) {
/* Low prefix is completely below the floor */
assert(check_upper);
check_upper = 0;
BN_free(bnhigh);
bnhigh = bnhigh2;
bnhigh2 = NULL;
BN_free(bnlow);
bnlow = bnlow2;
bnlow2 = NULL;
}
else if (BN_cmp(bnfloor, bnlow) > 0) {
/* Low prefix is partly below the floor */
BN_copy(bnlow, bnfloor);
}
}
} else {
BN_copy(bnhigh, bnceil);
BN_clear(bnlow);
}
/* Limit the prefix to the address type */
BN_clear(bntmp);
BN_set_word(bntmp, addrtype);
BN_lshift(bntmp2, bntmp, 192);
if (check_upper) {
if (BN_cmp(bntmp2, bnhigh2) > 0) {
check_upper = 0;
BN_free(bnhigh2);
bnhigh2 = NULL;
BN_free(bnlow2);
bnlow2 = NULL;
}
else if (BN_cmp(bntmp2, bnlow2) > 0)
BN_copy(bnlow2, bntmp2);
}
if (BN_cmp(bntmp2, bnhigh) > 0) {
if (!check_upper)
goto not_possible;
check_upper = 0;
BN_free(bnhigh);
bnhigh = bnhigh2;
bnhigh2 = NULL;
BN_free(bnlow);