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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 <assert.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#if defined(_WIN32) && !defined(HAVE_STRUCT_TIMESPEC)
#define HAVE_STRUCT_TIMESPEC
#endif
#include <pthread.h>
#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/obj_mac.h>
#include <openssl/ripemd.h>
#include <openssl/sha.h>
#ifndef _WIN32
#include "hs/hs_common.h"
#include "hs/hs_compile.h"
#endif
#include "avl.h"
#include "cashaddr.h"
#include "pattern.h"
#include "util.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, 32);
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;
vcp->vc_prep(vcp, vxcp);
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, const int isaddresscompressed) {
EC_POINT *pubkey;
const EC_GROUP *pgroup;
unsigned char eckey_buf[96], hash1[32];
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,
isaddresscompressed ? POINT_CONVERSION_COMPRESSED :
POINT_CONVERSION_UNCOMPRESSED,
eckey_buf, sizeof(eckey_buf), vxcp->vxc_bnctx);
SHA256(eckey_buf, len, hash1);
RIPEMD160(hash1, sizeof(hash1), vxcp->vxc_binres);
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;
const double targs[] = { 0.5, 0.75, 0.8, 0.9, 0.95, 1.0 };
targ = rate;
unit = (char *) "key/s";
if (targ > 1000) {
unit = (char *) "Kkey/s";
targ /= 1000.0;
if (targ > 1000) {
unit = (char *) "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 (unsigned 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 = (char *) "s";
if (time > 60) {
time /= 60;
unit = (char *) "min";
if (time > 60) {
time /= 60;
unit = (char *) "h";
if (time > 24) {
time /= 24;
unit = (char *) "d";
if (time > 365) {
time /= 365;
unit = (char *) "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;
}
snprintf(&linebuf[p], rem, COLOR0 " ");
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, int isaddresscompressed) {
unsigned char key_buf[512], *pend;
char addr_buf[64], addr2_buf[64];
char privkey_buf[128];
const char *keytype = "Privkey";
int len;
int isscript = (vcp->vc_addrtype == (1 << 3));
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 (isscript)
vg_encode_script_address(ppnt, EC_KEY_get0_group(pkey),
vcp->vc_istestnet, addr2_buf);
else {
if (isaddresscompressed) {
vg_encode_compressed_address(ppnt,
EC_KEY_get0_group(pkey), vcp->vc_istestnet,
addr_buf);
} else {
vg_encode_address(ppnt, EC_KEY_get0_group(pkey),
vcp->vc_istestnet, addr_buf);
}
}
if (isaddresscompressed)
vg_encode_privkey_compressed(
pkey, vcp->vc_privtype, privkey_buf);
else
vg_encode_privkey(pkey, vcp->vc_privtype, privkey_buf);
if (vcp->vc_verbose > 0 || !vcp->vc_result_file ||
!vcp->vc_result_file_csv) {
printf("\r%79s\r" COLOR0 "Pattern: " COLOR33 "%s" COLOR0 "\n",
"", pattern);
}
if (vcp->vc_verbose > 1) {
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_verbose > 0 || !vcp->vc_result_file ||
!vcp->vc_result_file_csv) {
if (isscript) {
printf("P2SHAddress: " COLOR32 "%s" COLOR0 "\n",
addr2_buf);
} else {
printf("Address: " COLOR32 "%s" COLOR0 "\n", addr_buf);
}
printf("%s: " COLOR34 "%s" COLOR0 "\n", keytype, privkey_buf);
}
if (vcp->vc_result_file) {
FILE *fp = fopen(vcp->vc_result_file, "a");
if (!fp) {
fprintf(stderr,
"ERROR: could not open TSV result file: %s\n",
strerror(errno));
} else {
fprintf(fp, "%s\t", pattern);
if (isscript)
fprintf(fp, "%s\t", addr2_buf);
else
fprintf(fp, "%s\t", addr_buf);
fprintf(fp, "%s\n", privkey_buf);
fclose(fp);
}
}
if (vcp->vc_result_file_csv) {
FILE *fp = fopen(vcp->vc_result_file_csv, "a");
if (!fp) {
fprintf(stderr,
"ERROR: could not open CSV result file: %s\n",
strerror(errno));
} else {
fprintf(fp, "%s,", pattern);
if (isscript)
fprintf(fp, "%s,", addr2_buf);
else
fprintf(fp, "%s,", addr_buf);
fprintf(fp, "%s\n", 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 **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_hash160_sort(vg_context_t *vcp, void *buf) {
if (!vcp->vc_hash160_sort) return 0;
return vcp->vc_hash160_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;
}
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.
*/
static int get_prefix_ranges(int addrtype, const char *pfx, BIGNUM **result) {
BIGNUM *low = BN_new(), *high = BN_new();
BIGNUM *bntmp = BN_new();
int p = strlen(pfx);
int ret = -1;
if (p == 0) {
p = 1;
goto no_prefix;
}
if (p > 30) {
fprintf(stderr, "Prefix too long! 30 characters at most.\n");
ret = -2;
goto out;
}
if (addrtype == (1 << 3)) {
if (pfx[0] != 'p') {
fprintf(stderr,
"The first character of the prefix must be 'p' "
"for "
"script addresses.\n");
ret = -2;
goto out;
}
} else {
if (pfx[0] != 'q') {
fprintf(stderr,
"The first character of the prefix must be 'q' "
"for "
"standard addresses.\n");
ret = -2;
goto out;
}
}
if (p == 1) {
no_prefix:
BN_set_word(bntmp, 3);
BN_add(high, high, bntmp);
goto end_prefix;
}
if (pfx[1] != 'q' && pfx[1] != 'p' && pfx[1] != 'z' && pfx[1] != 'r') {
fprintf(stderr,
"The second character of the prefix must be either "
"'q', "
"'p', 'r' or 'z'.\n");
ret = -2;
goto out;
}
for (int i = 1, c; i < p; i++) {
c = CHARSET_REV[(int) pfx[i]];
if (c == -1) {
fprintf(stderr,
"Invalid character '%c' in prefix '%s'\n",
pfx[i], pfx);
ret = -2;
goto out;
}
BN_set_word(bntmp, c);
BN_lshift(low, low, 5);
BN_add(low, low, bntmp);
BN_lshift(high, high, 5);
BN_add(high, high, bntmp);
}
end_prefix:
BN_set_word(bntmp, 31);
for (; p < 34; p++) {
BN_lshift(low, low, 5);
BN_lshift(high, high, 5);
BN_add(high, high, bntmp);
}
// Actually, the last char before the
// checksum contains 3 bits of info!
BN_rshift(low, low, 2);
BN_rshift(high, high, 2);
result[0] = low;
result[1] = high;
ret = 0;
out:
BN_free(bntmp);
return ret;
}
static void free_ranges(BIGNUM **ranges) {
BN_free(ranges[0]);
BN_free(ranges[1]);
ranges[0] = NULL;
ranges[1] = NULL;
}
/*
* Address prefix AVL tree node
*/
typedef struct _vg_prefix_s {
avl_item_t vp_item;
struct _vg_prefix_s *vp_sibling;
const char *vp_pattern;
BIGNUM *vp_low;
BIGNUM *vp_high;
} vg_prefix_t;
static void vg_prefix_free(vg_prefix_t *vp) {
if (vp->vp_low) BN_free(vp->vp_low);
if (vp->vp_high) BN_free(vp->vp_high);
free(vp);
}
static vg_prefix_t *vg_prefix_avl_search(avl_root_t *rootp, BIGNUM *targ) {
vg_prefix_t *vp;
avl_item_t *itemp = rootp->ar_root;
while (itemp) {
vp = avl_item_entry(itemp, vg_prefix_t, vp_item);
if (BN_cmp(vp->vp_low, targ) > 0) {
itemp = itemp->ai_left;
} else {
if (BN_cmp(vp->vp_high, targ) < 0) {
itemp = itemp->ai_right;
} else
return vp;
}
}
return NULL;
}
static vg_prefix_t *vg_prefix_avl_insert(
avl_root_t *rootp, vg_prefix_t *vpnew) {
vg_prefix_t *vp;
avl_item_t *itemp = NULL;
avl_item_t **ptrp = &rootp->ar_root;
while (*ptrp) {
itemp = *ptrp;
vp = avl_item_entry(itemp, vg_prefix_t, vp_item);
if (BN_cmp(vp->vp_low, vpnew->vp_high) > 0) {
ptrp = &itemp->ai_left;
} else {
if (BN_cmp(vp->vp_high, vpnew->vp_low) < 0) {
ptrp = &itemp->ai_right;
} else
return vp;
}
}
vpnew->vp_item.ai_up = itemp;
itemp = &vpnew->vp_item;
*ptrp = itemp;
avl_insert_fix(rootp, itemp);
return NULL;
}
static vg_prefix_t *vg_prefix_first(avl_root_t *rootp) {
avl_item_t *itemp;
itemp = avl_first(rootp);
if (itemp) return avl_item_entry(itemp, vg_prefix_t, vp_item);
return NULL;
}
static vg_prefix_t *vg_prefix_next(vg_prefix_t *vp) {
avl_item_t *itemp = &vp->vp_item;
itemp = avl_next(itemp);
if (itemp) return avl_item_entry(itemp, vg_prefix_t, vp_item);
return NULL;
}
static vg_prefix_t *vg_prefix_add(
avl_root_t *rootp, const char *pattern, BIGNUM *low, BIGNUM *high) {
vg_prefix_t *vp, *vp2;
assert(BN_cmp(low, high) < 0);
vp = (vg_prefix_t *) malloc(sizeof(*vp));
if (vp) {
avl_item_init(&vp->vp_item);
vp->vp_sibling = NULL;
vp->vp_pattern = pattern;
vp->vp_low = low;
vp->vp_high = high;
vp2 = vg_prefix_avl_insert(rootp, vp);
if (vp2 != NULL) {
fprintf(stderr, "Prefix '%s' ignored, overlaps '%s'\n",
pattern, vp2->vp_pattern);
vg_prefix_free(vp);
vp = NULL;
}
}
return vp;
}
static void vg_prefix_delete(avl_root_t *rootp, vg_prefix_t *vp) {
vg_prefix_t *sibp, *delp;
avl_remove(rootp, &vp->vp_item);
sibp = vp->vp_sibling;
while (sibp && sibp != vp) {
avl_remove(rootp, &sibp->vp_item);
delp = sibp;
sibp = sibp->vp_sibling;
vg_prefix_free(delp);
}
vg_prefix_free(vp);
}
static vg_prefix_t *vg_prefix_add_ranges(avl_root_t *rootp, const char *pattern,
BIGNUM **ranges, vg_prefix_t *master) {
assert(ranges[0]);
vg_prefix_t *vp = vg_prefix_add(rootp, pattern, ranges[0], ranges[1]);
if (!vp) return NULL;
if (!master) {
vp->vp_sibling = NULL;
} else {
vp->vp_sibling =
(master->vp_sibling ? master->vp_sibling : master);
master->vp_sibling = vp;
}
return vp;
}
static void vg_prefix_range_sum(vg_prefix_t *vp, BIGNUM *result, BIGNUM *tmp1) {
vg_prefix_t *startp;
startp = vp;
BN_clear(result);
do {
BN_sub(tmp1, vp->vp_high, vp->vp_low);
BN_add(result, result, tmp1);
vp = vp->vp_sibling;
} while (vp && (vp != startp));
}
typedef struct _vg_prefix_context_s {
vg_context_t base;
avl_root_t vcp_avlroot;
BIGNUM *vcp_difficulty;
} vg_prefix_context_t;
static void vg_prefix_context_clear_all_patterns(vg_context_t *vcp) {
vg_prefix_context_t *vcpp = (vg_prefix_context_t *) vcp;
vg_prefix_t *vp;
unsigned long npfx_left = 0;
while (!avl_root_empty(&vcpp->vcp_avlroot)) {
vp = avl_item_entry(
vcpp->vcp_avlroot.ar_root, vg_prefix_t, vp_item);
vg_prefix_delete(&vcpp->vcp_avlroot, vp);
npfx_left++;
}
assert(npfx_left == vcpp->base.vc_npatterns);
vcpp->base.vc_npatterns = 0;
vcpp->base.vc_npatterns_start = 0;
vcpp->base.vc_found = 0;
BN_clear(vcpp->vcp_difficulty);
}
static void vg_prefix_context_free(vg_context_t *vcp) {
vg_prefix_context_t *vcpp = (vg_prefix_context_t *) vcp;
vg_prefix_context_clear_all_patterns(vcp);
BN_clear_free(vcpp->vcp_difficulty);
free(vcpp);
}
static void vg_prefix_context_next_difficulty(vg_prefix_context_t *vcpp,
BIGNUM *bntmp, BIGNUM *bntmp2, BN_CTX *bnctx) {
char *dbuf;
BN_clear(bntmp);
BN_set_bit(bntmp, 160);
BN_div(bntmp2, NULL, bntmp, vcpp->vcp_difficulty, bnctx);
dbuf = BN_bn2dec(bntmp2);
if (vcpp->base.vc_verbose > 0) {
if (vcpp->base.vc_npatterns > 1)
fprintf(stderr,
"Next match difficulty: " COLOR36 "%s" COLOR0
" (%ld prefixes)\n",
dbuf, vcpp->base.vc_npatterns);
else
fprintf(stderr, "Difficulty: " COLOR36 "%s" COLOR0 "\n",
dbuf);
}
vcpp->base.vc_chance = atof(dbuf);
OPENSSL_free(dbuf);
}
static int vg_prefix_context_add_patterns(
vg_context_t *vcp, const char **patterns, int npatterns) {
vg_prefix_context_t *vcpp = (vg_prefix_context_t *) vcp;
vg_prefix_t *vp;
BN_CTX *bnctx;
BIGNUM *bntmp = BN_new(), *bntmp2 = BN_new(), *bntmp3 = BN_new();
BIGNUM *ranges[2];
int ret = 0;
int i, impossible = 0;
unsigned long npfx;
char *dbuf;
bnctx = BN_CTX_new();
npfx = 0;
for (i = 0; i < npatterns; i++) {
vp = NULL;
ret = get_prefix_ranges(
vcpp->base.vc_addrtype, patterns[i], ranges);
if (!ret) {
vp = vg_prefix_add_ranges(
&vcpp->vcp_avlroot, patterns[i], ranges, NULL);
}
if (ret == -2) {
fprintf(stderr, "Prefix '%s' not possible\n",
patterns[i]);
impossible++;
}
if (!vp) continue;
npfx++;
/* Determine the probability of finding a match */
vg_prefix_range_sum(vp, bntmp, bntmp2);
BN_add(bntmp2, vcpp->vcp_difficulty, bntmp);
BN_copy(vcpp->vcp_difficulty, bntmp2);
if (vcp->vc_verbose > 1) {
BN_clear(bntmp2);
BN_set_bit(bntmp2, 160);
BN_div(bntmp3, NULL, bntmp2, bntmp, bnctx);
dbuf = BN_bn2dec(bntmp3);
fprintf(stderr, "Prefix difficulty: %20s %s\n", dbuf,
patterns[i]);
OPENSSL_free(dbuf);
}
}
vcpp->base.vc_npatterns += npfx;
vcpp->base.vc_npatterns_start += npfx;
if (!npfx && impossible)
fprintf(stderr,
"Advice: run with the -c argument to see the "
"conditions.\n");
if (npfx) vg_prefix_context_next_difficulty(vcpp, bntmp, bntmp2, bnctx);
ret = (npfx != 0);
BN_clear_free(bntmp);
BN_clear_free(bntmp2);
BN_clear_free(bntmp3);
BN_CTX_free(bnctx);
return ret;
}
static int vg_prefix_context_add_raw_ranges(vg_context_t *vcp,
const char *patname, const char **range, int nrange) {
vg_prefix_context_t *vcpp = (vg_prefix_context_t *) vcp;
vg_prefix_t *vp = NULL;
BN_CTX *bnctx;
BIGNUM *bntmp = BN_new(), *bntmp2 = BN_new(), *bntmp3 = BN_new();
BIGNUM *difficulty = BN_new();
BIGNUM *ranges[2];
unsigned long npfx;
char *dbuf;
bnctx = BN_CTX_new();
npfx = 0;
for (int i = 0; i < nrange; i++) {
ranges[0] = BN_new();
ranges[1] = BN_new();
if (BN_bin2bn((const unsigned char *) range[i], 20,
ranges[0]) == NULL ||
BN_bin2bn((const unsigned char *) &range[i][20], 20,