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vanitygen
mirror of https://github.com/GOSTSec/vanitygen
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Add private key password-protection.

master
samr7 13 years ago
parent
e460371230
commit
b15be3734e
6 changed files with 388 additions and 7 deletions
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  1. 25
      oclvanitygen.c
  2. 25
      pattern.c
  3. 1
      pattern.h
  4. 311
      util.c
  5. 8
      util.h
  6. 25
      vanitygen.c

25
oclvanitygen.c
Unescape View File

@ -2248,6 +2248,8 @@ usage(const char *name) @@ -2248,6 +2248,8 @@ usage(const char *name)
"-N Generate namecoin address\n"
"-T Generate bitcoin testnet address\n"
"-X <version> Generate address with the given version\n"
"-e Encrypt private keys, prompt for password\n"
"-E <password> Encrypt private keys with <password> (UNSAFE)\n"
"-p <platform> Select OpenCL platform\n"
"-d <device> Select OpenCL device\n"
"-S Safe mode, disable OpenCL loop unrolling optimizations\n"
@ -2270,7 +2272,9 @@ main(int argc, char **argv) @@ -2270,7 +2272,9 @@ main(int argc, char **argv)
int regex = 0;
int caseinsensitive = 0;
int opt;
char pwbuf[128];
int platformidx = -1, deviceidx = -1;
int prompt_password = 0;
char *seedfile = NULL;
FILE *fp = NULL;
char **patterns, *pend;
@ -2285,9 +2289,10 @@ main(int argc, char **argv) @@ -2285,9 +2289,10 @@ main(int argc, char **argv)
vg_context_t *vcp = NULL;
cl_device_id did;
const char *result_file = NULL;
const char *key_password = NULL;
while ((opt = getopt(argc, argv,
"vqrikNTX:p:d:w:t:g:b:Sh?f:o:s:")) != -1) {
"vqrikNTX:eE:p:d:w:t:g:b:Sh?f:o:s:")) != -1) {
switch (opt) {
case 'v':
verbose = 2;
@ -2316,6 +2321,12 @@ main(int argc, char **argv) @@ -2316,6 +2321,12 @@ main(int argc, char **argv)
addrtype = atoi(optarg);
privtype = 128 + addrtype;
break;
case 'e':
prompt_password = 1;
break;
case 'E':
key_password = optarg;
break;
case 'p':
platformidx = atoi(optarg);
break;
@ -2467,6 +2478,18 @@ main(int argc, char **argv) @@ -2467,6 +2478,18 @@ main(int argc, char **argv)
return 1;
}
if (prompt_password) {
if (!vg_read_password(pwbuf, sizeof(pwbuf)))
return 1;
key_password = pwbuf;
}
vcp->vc_key_protect_pass = key_password;
if (key_password) {
if (!vg_check_password_complexity(key_password, verbose))
printf("WARNING: Protecting private keys with "
"weak password\n");
}
if ((verbose > 0) && regex && (vcp->vc_npatterns > 1))
printf("Regular expressions: %ld\n", vcp->vc_npatterns);

25
pattern.c
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@ -306,11 +306,26 @@ vg_output_match(vg_context_t *vcp, EC_KEY *pkey, const char *pattern) @@ -306,11 +306,26 @@ vg_output_match(vg_context_t *vcp, EC_KEY *pkey, const char *pattern)
unsigned char key_buf[512], *pend;
char addr_buf[64];
char privkey_buf[128];
const char *keytype = "Privkey";
int len;
assert(EC_KEY_check_key(pkey));
vg_encode_address(pkey, vcp->vc_addrtype, addr_buf);
vg_encode_privkey(pkey, vcp->vc_privtype, privkey_buf);
if (vcp->vc_key_protect_pass) {
len = vg_protect_encode_privkey(privkey_buf,
pkey, vcp->vc_privtype,
vcp->vc_key_protect_pass);
if (len) {
keytype = "Protkey";
} else {
printf("ERROR: could not password-protect key\n");
vcp->vc_key_protect_pass = NULL;
}
}
if (!vcp->vc_key_protect_pass) {
vg_encode_privkey(pkey, vcp->vc_privtype, privkey_buf);
}
if (!vcp->vc_result_file || (vcp->vc_verbose > 0)) {
printf("\r%79s\rPattern: %s\n", "", pattern);
@ -334,8 +349,8 @@ vg_output_match(vg_context_t *vcp, EC_KEY *pkey, const char *pattern) @@ -334,8 +349,8 @@ vg_output_match(vg_context_t *vcp, EC_KEY *pkey, const char *pattern)
if (!vcp->vc_result_file || (vcp->vc_verbose > 0)) {
printf("Address: %s\n"
"Privkey: %s\n",
addr_buf, privkey_buf);
"%s: %s\n",
addr_buf, keytype, privkey_buf);
}
if (vcp->vc_result_file) {
@ -347,8 +362,8 @@ vg_output_match(vg_context_t *vcp, EC_KEY *pkey, const char *pattern) @@ -347,8 +362,8 @@ vg_output_match(vg_context_t *vcp, EC_KEY *pkey, const char *pattern)
fprintf(fp,
"Pattern: %s\n"
"Address: %s\n"
"Privkey: %s\n",
pattern, addr_buf, privkey_buf);
"%s: %s\n",
pattern, addr_buf, keytype, privkey_buf);
fclose(fp);
}
}

1
pattern.h
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@ -75,6 +75,7 @@ struct _vg_context_s { @@ -75,6 +75,7 @@ struct _vg_context_s {
unsigned long long vc_found;
double vc_chance;
const char *vc_result_file;
const char *vc_key_protect_pass;
int vc_remove_on_match;
int vc_verbose;
vg_free_func_t vc_free;

311
util.c
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@ -20,10 +20,14 @@ @@ -20,10 +20,14 @@
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <math.h>
#include <openssl/bn.h>
#include <openssl/sha.h>
#include <openssl/ripemd.h>
#include <openssl/hmac.h>
#include <openssl/evp.h>
#include <openssl/rand.h>
#include "pattern.h"
#include "util.h"
@ -284,6 +288,313 @@ vg_decode_privkey(const char *b58encoded, EC_KEY *pkey, int *addrtype) @@ -284,6 +288,313 @@ vg_decode_privkey(const char *b58encoded, EC_KEY *pkey, int *addrtype)
return res;
}
#define VG_PROTKEY_SALT_SIZE 4
#define VG_PROTKEY_HMAC_SIZE 8
#define VG_PROTKEY_HMAC_KEY_SIZE 16
static int
vg_protect_setup(EVP_CIPHER_CTX *ctx, unsigned char *hmac_out,
const char *pass, const unsigned char *salt, int enc)
{
unsigned char keymaterial[EVP_MAX_KEY_LENGTH + EVP_MAX_IV_LENGTH +
VG_PROTKEY_HMAC_KEY_SIZE];
const EVP_CIPHER *cipher;
cipher = EVP_aes_256_cbc();
PKCS5_PBKDF2_HMAC((const char *) pass, strlen(pass) + 1,
salt, VG_PROTKEY_SALT_SIZE,
4096,
EVP_sha256(),
cipher->key_len + cipher->iv_len +
VG_PROTKEY_HMAC_KEY_SIZE,
keymaterial);
if (!EVP_CipherInit(ctx, cipher,
keymaterial,
keymaterial + cipher->key_len,
enc)) {
OPENSSL_cleanse(keymaterial, sizeof(keymaterial));
printf("ERROR: could not configure cipher\n");
return 0;
}
EVP_CIPHER_CTX_set_padding(ctx, 0);
memcpy(hmac_out,
keymaterial + cipher->key_len + cipher->iv_len,
VG_PROTKEY_HMAC_KEY_SIZE);
OPENSSL_cleanse(keymaterial, sizeof(keymaterial));
return 1;
}
int
vg_protect_encode_privkey(char *out,
const EC_KEY *pkey, int keytype,
const char *pass)
{
unsigned char ecpriv[64];
unsigned char ecenc[64];
unsigned char hmac[EVP_MAX_MD_SIZE];
unsigned char salt[VG_PROTKEY_SALT_SIZE];
unsigned char hmac_key[VG_PROTKEY_HMAC_KEY_SIZE];
const BIGNUM *privkey;
EVP_CIPHER_CTX *ctx = NULL;
unsigned int hlen;
int opos, olen, oincr, nbytes;
privkey = EC_KEY_get0_private_key(pkey);
nbytes = BN_num_bytes(privkey);
if (nbytes < 32)
memset(ecpriv, 0, 32 - nbytes);
BN_bn2bin(privkey, ecpriv + 32 - nbytes);
ctx = EVP_CIPHER_CTX_new();
/*
* The string representation of this protected key is
* ridiculously long. To save a few bytes, we will only
* add four unique random bytes to the salt, out of the
* eight mandated by PBKDF. This should not reduce its
* effectiveness.
*/
RAND_bytes(salt, VG_PROTKEY_SALT_SIZE);
if (!vg_protect_setup(ctx, hmac_key, pass, salt, 1)) {
EVP_CIPHER_CTX_free(ctx);
return 0;
}
hlen = sizeof(hmac);
HMAC(EVP_sha256(),
hmac_key, VG_PROTKEY_HMAC_KEY_SIZE,
ecpriv, 32,
hmac, &hlen);
OPENSSL_cleanse(hmac_key, sizeof(hmac_key));
ecenc[0] = 136;
opos = 1;
olen = sizeof(ecenc) - opos;
oincr = olen;
EVP_EncryptUpdate(ctx, ecenc + opos, &oincr, ecpriv, 32);
opos += oincr;
olen -= oincr;
oincr = olen;
EVP_EncryptFinal(ctx, ecenc + opos, &oincr);
opos += oincr;
EVP_CIPHER_CTX_free(ctx);
memcpy(ecenc + opos, hmac, VG_PROTKEY_HMAC_SIZE);
opos += VG_PROTKEY_HMAC_SIZE;
memcpy(ecenc + opos, salt, VG_PROTKEY_SALT_SIZE);
opos += VG_PROTKEY_SALT_SIZE;
vg_b58_encode_check(ecenc, opos, out);
nbytes = strlen(out);
assert(nbytes == 67);
return nbytes;
}
int
vg_protect_decode_privkey(EC_KEY *pkey, int *keytype,
const char *encoded, const char *pass)
{
unsigned char ecpriv[64];
unsigned char ecenc[64];
unsigned char hmac[EVP_MAX_MD_SIZE];
unsigned char salt[VG_PROTKEY_SALT_SIZE];
unsigned char hmac_key[VG_PROTKEY_HMAC_KEY_SIZE];
EVP_CIPHER_CTX *ctx = NULL;
BIGNUM bn;
unsigned int hlen;
int opos, olen, oincr;
int res;
res = vg_b58_decode_check(encoded, ecenc, sizeof(ecenc));
if (res != 45)
return 0;
memcpy(salt, ecenc + 41, VG_PROTKEY_SALT_SIZE);
ctx = EVP_CIPHER_CTX_new();
if (!vg_protect_setup(ctx, hmac_key, pass, salt, 0)) {
EVP_CIPHER_CTX_free(ctx);
return 0;
}
opos = 0;
olen = sizeof(ecenc) - opos;
oincr = olen;
EVP_DecryptUpdate(ctx, ecpriv + opos, &oincr, ecenc + 1, 32);
opos += oincr;
olen -= oincr;
oincr = olen;
EVP_DecryptFinal(ctx, ecpriv + opos, &oincr);
opos += oincr;
EVP_CIPHER_CTX_free(ctx);
hlen = sizeof(hmac);
HMAC(EVP_sha256(),
hmac_key, VG_PROTKEY_HMAC_KEY_SIZE,
ecpriv, 32,
hmac, &hlen);
if (memcmp(ecenc + 33, hmac, VG_PROTKEY_HMAC_SIZE)) {
OPENSSL_cleanse(ecpriv, sizeof(ecpriv));
printf("ERROR: invalid password\n");
return 0;
}
BN_init(&bn);
BN_bin2bn(ecpriv, 32, &bn);
res = vg_set_privkey(&bn, pkey);
BN_clear_free(&bn);
OPENSSL_cleanse(ecpriv, sizeof(ecpriv));
if (res) {
switch(ecenc[0]) {
case 136:
*keytype = 128;
break;
default:
printf("Unrecognized private key type\n");
res = 0;
break;
}
}
return res;
}
int
vg_read_password(char *buf, size_t size)
{
return !EVP_read_pw_string(buf, size, "Enter new password:", 1);
}
/*
* Password complexity checker
* Heavily inspired by, but a simplification of "How Secure Is My Password?",
* http://howsecureismypassword.net/
*/
static unsigned char ascii_class[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
5, 4, 5, 4, 4, 4, 4, 5, 4, 4, 4, 4, 5, 4, 5, 5,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 5, 5, 5, 4, 5, 5,
4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 5, 5, 5, 4, 4,
5, 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, 5, 5, 5, 5, 0,
};
int
vg_check_password_complexity(const char *pass, int verbose)
{
int i, len;
int classes[6] = { 0, };
const char *crackunit = "seconds";
int char_complexity = 0;
double crackops, cracktime;
int weak;
/*
* This number reflects a resourceful attacker with
* USD >$20K in 2011 hardware
*/
const int rate = 250000000;
/* Consider the password weak if it can be cracked in <1 year */
const int weak_threshold = (60*60*24*365);
len = strlen(pass);
for (i = 0; i < len; i++) {
if (pass[i] > sizeof(ascii_class))
/* FIXME: skip the rest of the UTF8 char */
classes[5]++;
else if (!ascii_class[(int)pass[i]])
continue;
else
classes[(int)ascii_class[(int)pass[i]] - 1]++;
}
if (classes[0])
char_complexity += 26;
if (classes[1])
char_complexity += 26;
if (classes[2])
char_complexity += 10;
if (classes[3])
char_complexity += 14;
if (classes[4])
char_complexity += 19;
if (classes[5])
char_complexity += 32; /* oversimplified */
/* This assumes brute-force and oversimplifies the problem */
crackops = pow((double)char_complexity, (double)len);
cracktime = (crackops * (1 - (1/M_E))) / rate;
weak = (cracktime < weak_threshold);
if (cracktime > 60.0) {
cracktime /= 60.0;
crackunit = "minutes";
if (cracktime > 60.0) {
cracktime /= 60.0;
crackunit = "hours";
if (cracktime > 24.0) {
cracktime /= 24;
crackunit = "days";
if (cracktime > 365.0) {
cracktime /= 365.0;
crackunit = "years";
}
}
}
}
/* Complain by default about weak passwords */
if ((weak && (verbose > 0)) || (verbose > 1)) {
if (cracktime < 1.0) {
printf("Estimated password crack time: >1 %s\n",
crackunit);
} else if (cracktime < 1000000) {
printf("Estimated password crack time: %.1f %s\n",
cracktime, crackunit);
} else {
printf("Estimated password crack time: %e %s\n",
cracktime, crackunit);
}
if (!classes[0] && !classes[1] && classes[2] &&
!classes[3] && !classes[4] && !classes[5]) {
printf("WARNING: Password contains only numbers\n");
}
else if (!classes[2] && !classes[3] && !classes[4] &&
!classes[5]) {
if (!classes[0] || !classes[1]) {
printf("WARNING: Password contains "
"only %scase letters\n",
classes[0] ? "lower" : "upper");
} else {
printf("WARNING: Password contains "
"only letters\n");
}
}
}
return !weak;
}
/*
* Pattern file reader

8
util.h
Unescape View File

@ -39,6 +39,14 @@ extern int vg_set_privkey(const BIGNUM *bnpriv, EC_KEY *pkey); @@ -39,6 +39,14 @@ extern int vg_set_privkey(const BIGNUM *bnpriv, EC_KEY *pkey);
extern int vg_decode_privkey(const char *b58encoded,
EC_KEY *pkey, int *addrtype);
extern int vg_protect_encode_privkey(char *out,
const EC_KEY *pkey, int keytype,
const char *pass);
extern int vg_protect_decode_privkey(EC_KEY *pkey, int *keytype,
const char *encoded, const char *pass);
extern int vg_read_password(char *buf, size_t size);
extern int vg_check_password_complexity(const char *pass, int verbose);
extern int vg_read_file(FILE *fp, char ***result, int *rescount);

25
vanitygen.c
Unescape View File

@ -449,6 +449,8 @@ usage(const char *name) @@ -449,6 +449,8 @@ usage(const char *name)
"-N Generate namecoin address\n"
"-T Generate bitcoin testnet address\n"
"-X <version> Generate address with the given version\n"
"-e Encrypt private keys, prompt for password\n"
"-E <password> Encrypt private keys with <password> (UNSAFE)\n"
"-t <threads> Set number of worker threads (Default: number of CPUs)\n"
"-f <file> File containing list of patterns, one per line\n"
" (Use \"-\" as the file name for stdin)\n"
@ -466,16 +468,19 @@ main(int argc, char **argv) @@ -466,16 +468,19 @@ main(int argc, char **argv)
int caseinsensitive = 0;
int verbose = 1;
int remove_on_match = 1;
int prompt_password = 0;
int opt;
char *seedfile = NULL;
FILE *fp = NULL;
char pwbuf[128];
const char *result_file = NULL;
const char *key_password = NULL;
char **patterns;
int npatterns = 0;
int nthreads = 0;
vg_context_t *vcp = NULL;
while ((opt = getopt(argc, argv, "vqrikNTX:t:h?f:o:s:")) != -1) {
while ((opt = getopt(argc, argv, "vqrikeE:NTX:t:h?f:o:s:")) != -1) {
switch (opt) {
case 'v':
verbose = 2;
@ -504,6 +509,12 @@ main(int argc, char **argv) @@ -504,6 +509,12 @@ main(int argc, char **argv)
addrtype = atoi(optarg);
privtype = 128 + addrtype;
break;
case 'e':
prompt_password = 1;
break;
case 'E':
key_password = optarg;
break;
case 't':
nthreads = atoi(optarg);
if (nthreads == 0) {
@ -615,6 +626,18 @@ main(int argc, char **argv) @@ -615,6 +626,18 @@ main(int argc, char **argv)
return 1;
}
if (prompt_password) {
if (!vg_read_password(pwbuf, sizeof(pwbuf)))
return 1;
key_password = pwbuf;
}
vcp->vc_key_protect_pass = key_password;
if (key_password) {
if (!vg_check_password_complexity(key_password, verbose))
printf("WARNING: Protecting private keys with "
"weak password\n");
}
if ((verbose > 0) && regex && (vcp->vc_npatterns > 1))
printf("Regular expressions: %ld\n", vcp->vc_npatterns);

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