#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/time.h>
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#include "ntp_types.h"
#include "ntp_random.h"
#include "l_stdlib.h"
#ifdef SYS_WINNT
extern int ntp_getopt P((int, char **, const char *));
#define getopt ntp_getopt
#define optarg ntp_optarg
#endif
#ifdef OPENSSL
#include "openssl/bn.h"
#include "openssl/evp.h"
#include "openssl/err.h"
#include "openssl/rand.h"
#include "openssl/pem.h"
#include "openssl/x509v3.h"
#include <openssl/objects.h>
#endif
#define MD5KEYS 16
#define JAN_1970 ULONG_CONST(2208988800)
#define YEAR ((long)60*60*24*365)
#define MAXFILENAME 256
#define MAXHOSTNAME 256
#ifdef OPENSSL
#define PLEN 512
#define KEY_USAGE "digitalSignature,keyCertSign"
#define BASIC_CONSTRAINTS "critical,CA:TRUE"
#define EXT_KEY_PRIVATE "private"
#define EXT_KEY_TRUST "trustRoot"
#endif
FILE *fheader P((const char *, const char *));
void fslink P((const char *, const char *));
int gen_md5 P((char *));
#ifdef OPENSSL
EVP_PKEY *gen_rsa P((char *));
EVP_PKEY *gen_dsa P((char *));
EVP_PKEY *gen_iff P((char *));
EVP_PKEY *gen_gqpar P((char *));
EVP_PKEY *gen_gqkey P((char *, EVP_PKEY *));
EVP_PKEY *gen_mv P((char *));
int x509 P((EVP_PKEY *, const EVP_MD *, char *, char *));
void cb P((int, int, void *));
EVP_PKEY *genkey P((char *, char *));
u_long asn2ntp P((ASN1_TIME *));
#endif
extern char *optarg;
int debug = 0;
int rval;
#ifdef OPENSSL
u_int modulus = PLEN;
#endif
int nkeys = 0;
time_t epoch;
char *hostname;
char *trustname;
char filename[MAXFILENAME + 1];
char *passwd1 = NULL;
char *passwd2 = NULL;
#ifdef OPENSSL
long d0, d1, d2, d3;
#endif
#ifdef SYS_WINNT
BOOL init_randfile();
int
readlink(char * link, char * file, int len) {
return (-1);
}
int
symlink(char *filename, char *linkname) {
DeleteFile(linkname);
MoveFile(filename, linkname);
return 0;
}
void
InitWin32Sockets() {
WORD wVersionRequested;
WSADATA wsaData;
wVersionRequested = MAKEWORD(2,0);
if (WSAStartup(wVersionRequested, &wsaData))
{
fprintf(stderr, "No useable winsock.dll");
exit(1);
}
}
#endif
int
main(
int argc,
char **argv
)
{
int errflg = 0;
struct timeval tv;
#ifdef OPENSSL
X509 *cert = NULL;
EVP_PKEY *pkey_host = NULL;
EVP_PKEY *pkey_sign = NULL;
EVP_PKEY *pkey_iff = NULL;
EVP_PKEY *pkey_gq = NULL;
EVP_PKEY *pkey_mv = NULL;
#endif
int md5key = 0;
#ifdef OPENSSL
int hostkey = 0;
int iffkey = 0;
int gqpar = 0;
int gqkey = 0;
int mvpar = 0;
int mvkey = 0;
char *sign = NULL;
EVP_PKEY *pkey = NULL;
const EVP_MD *ectx;
char pathbuf[MAXFILENAME + 1];
const char *scheme = NULL;
char *exten = NULL;
char *grpkey = NULL;
int nid;
FILE *fstr = NULL;
int iffsw = 0;
#endif
char hostbuf[MAXHOSTNAME + 1];
u_int temp;
#ifdef SYS_WINNT
InitWin32Sockets();
if(!init_randfile())
fprintf(stderr, "Unable to initialize .rnd file\n");
#endif
#ifdef OPENSSL
if ((SSLeay() ^ OPENSSL_VERSION_NUMBER) & ~0xff0L) {
fprintf(stderr,
"OpenSSL version mismatch. Built against %lx, you have %lx\n",
OPENSSL_VERSION_NUMBER, SSLeay());
return (-1);
} else {
fprintf(stderr,
"Using OpenSSL version %lx\n", SSLeay());
}
#endif
gethostname(hostbuf, MAXHOSTNAME);
hostname = hostbuf;
#ifdef OPENSSL
trustname = hostbuf;
passwd1 = hostbuf;
#endif
#ifndef SYS_WINNT
gettimeofday(&tv, 0);
#else
gettimeofday(&tv);
#endif
epoch = tv.tv_sec;
rval = 0;
while ((temp = getopt(argc, argv,
#ifdef OPENSSL
"c:deGgHIi:Mm:nPp:q:S:s:TV:v:"
#else
"dM"
#endif
)) != -1) {
switch(temp) {
#ifdef OPENSSL
case 'c':
scheme = optarg;
continue;
#endif
case 'd':
debug++;
continue;
#ifdef OPENSSL
case 'e':
iffsw++;
continue;
#endif
#ifdef OPENSSL
case 'G':
gqpar++;
continue;
#endif
#ifdef OPENSSL
case 'g':
gqkey++;
continue;
#endif
#ifdef OPENSSL
case 'H':
hostkey++;
continue;
#endif
#ifdef OPENSSL
case 'I':
iffkey++;
continue;
#endif
#ifdef OPENSSL
case 'i':
trustname = optarg;
continue;
#endif
case 'M':
md5key++;
continue;
#ifdef OPENSSL
case 'm':
if (sscanf(optarg, "%d", &modulus) != 1) {
fprintf(stderr,
"invalid option -m %s\n", optarg);
++errflg;
}
continue;
#endif
#ifdef OPENSSL
case 'P':
exten = EXT_KEY_PRIVATE;
continue;
#endif
#ifdef OPENSSL
case 'p':
passwd2 = optarg;
continue;
#endif
#ifdef OPENSSL
case 'q':
passwd1 = optarg;
continue;
#endif
#ifdef OPENSSL
case 'S':
sign = optarg;
continue;
#endif
#ifdef OPENSSL
case 's':
hostname = optarg;
continue;
#endif
#ifdef OPENSSL
case 'T':
exten = EXT_KEY_TRUST;
continue;
#endif
#ifdef OPENSSL
case 'V':
mvpar++;
if (sscanf(optarg, "%d", &nkeys) != 1) {
fprintf(stderr,
"invalid option -V %s\n", optarg);
++errflg;
}
continue;
#endif
#ifdef OPENSSL
case 'v':
mvkey++;
if (sscanf(optarg, "%d", &nkeys) != 1) {
fprintf(stderr,
"invalid option -v %s\n", optarg);
++errflg;
}
continue;
#endif
default:
++errflg;
continue;
}
}
if (errflg) {
printf("Usage: ntp-keygen [options]\n");
printf("where options are:\n");
#ifdef OPENSSL
printf(" -c cert_scheme\n");
#endif
printf(" -d increase debug level\n");
#ifdef OPENSSL
printf(" -e Write identity keys\n");
printf(" -G Generate GQ parameters and keys\n");
printf(" -g Update GQ keys\n");
printf(" -H Generate RSA Host key\n");
printf(" -I Generate IFF parameters\n");
printf(" -i issuer_name\n");
#endif
printf(" -M Generate MD5 keys\n");
#ifdef OPENSSL
printf(" -m modulus 256 - 2048\n");
printf(" -P generate PC private certificate\n");
printf(" -p output_pass output private password\n");
printf(" -q input_pass input private password\n");
printf(" -S sign-key generate sign key (RSA or DSA)\n");
printf(" -s set-subj-name\n");
printf(" -T Trusted certificate (TC scheme)\n");
printf(" -V #keys generate MV parameters\n");
printf(" -v #keys update MV parameters\n");
printf("\n");
printf("If there is no new host key, look for an existing one.\n");
printf("If one is not found, create it.\n");
#endif
exit(2);
}
if (passwd1 != NULL && passwd2 == NULL)
passwd2 = passwd1;
#ifdef OPENSSL
ERR_load_crypto_strings();
OpenSSL_add_all_algorithms();
if (RAND_file_name(pathbuf, MAXFILENAME) == NULL) {
fprintf(stderr, "RAND_file_name %s\n",
ERR_error_string(ERR_get_error(), NULL));
return (-1);
}
temp = RAND_load_file(pathbuf, -1);
if (temp == 0) {
fprintf(stderr,
"RAND_load_file %s not found or empty\n", pathbuf);
return (-1);
}
fprintf(stderr,
"Random seed file %s %u bytes\n", pathbuf, temp);
RAND_add(&epoch, sizeof(epoch), 4.0);
#endif
if (md5key)
gen_md5("MD5");
#ifdef OPENSSL
if (hostkey)
pkey_host = genkey("RSA", "host");
if (sign != NULL)
pkey_sign = genkey(sign, "sign");
if (iffkey)
pkey_iff = gen_iff("iff");
if (gqpar)
pkey_gq = gen_gqpar("gq");
if (mvpar)
pkey_mv = gen_mv("mv");
while (pkey_host == NULL && rval == 0 && !iffsw) {
sprintf(filename, "ntpkey_host_%s", hostname);
if ((fstr = fopen(filename, "r")) != NULL) {
pkey_host = PEM_read_PrivateKey(fstr, NULL,
NULL, passwd1);
fclose(fstr);
readlink(filename, filename, sizeof(filename));
if (pkey_host == NULL) {
fprintf(stderr, "Host key\n%s\n",
ERR_error_string(ERR_get_error(),
NULL));
rval = -1;
} else {
fprintf(stderr,
"Using host key %s\n", filename);
}
break;
} else if ((pkey_host = genkey("RSA", "host")) ==
NULL) {
rval = -1;
break;
}
}
pkey = pkey_sign;
while (pkey_sign == NULL && rval == 0 && !iffsw) {
sprintf(filename, "ntpkey_sign_%s", hostname);
if ((fstr = fopen(filename, "r")) != NULL) {
pkey_sign = PEM_read_PrivateKey(fstr, NULL,
NULL, passwd1);
fclose(fstr);
readlink(filename, filename, sizeof(filename));
if (pkey_sign == NULL) {
fprintf(stderr, "Sign key\n%s\n",
ERR_error_string(ERR_get_error(),
NULL));
rval = -1;
} else {
fprintf(stderr, "Using sign key %s\n",
filename);
}
break;
} else {
pkey = pkey_host;
fprintf(stderr, "Using host key as sign key\n");
break;
}
}
if (pkey_iff == NULL && rval == 0) {
sprintf(filename, "ntpkey_iff_%s", hostname);
if ((fstr = fopen(filename, "r")) != NULL) {
pkey_iff = PEM_read_PrivateKey(fstr, NULL,
NULL, passwd1);
fclose(fstr);
readlink(filename, filename, sizeof(filename));
if (pkey_iff == NULL) {
fprintf(stderr, "IFF parameters\n%s\n",
ERR_error_string(ERR_get_error(),
NULL));
rval = -1;
} else {
fprintf(stderr,
"Using IFF parameters %s\n",
filename);
}
}
}
if (pkey_gq == NULL && rval == 0 && !iffsw) {
sprintf(filename, "ntpkey_gq_%s", hostname);
if ((fstr = fopen(filename, "r")) != NULL) {
pkey_gq = PEM_read_PrivateKey(fstr, NULL, NULL,
passwd1);
fclose(fstr);
readlink(filename, filename, sizeof(filename));
if (pkey_gq == NULL) {
fprintf(stderr, "GQ parameters\n%s\n",
ERR_error_string(ERR_get_error(),
NULL));
rval = -1;
} else {
fprintf(stderr,
"Using GQ parameters %s\n",
filename);
}
}
}
if (pkey_gq != NULL && rval == 0) {
gen_gqkey("gq", pkey_gq);
grpkey = BN_bn2hex(pkey_gq->pkey.rsa->q);
}
while (scheme == NULL && rval == 0 && !iffsw) {
sprintf(filename, "ntpkey_cert_%s", hostname);
if ((fstr = fopen(filename, "r")) != NULL) {
cert = PEM_read_X509(fstr, NULL, NULL, NULL);
fclose(fstr);
readlink(filename, filename, sizeof(filename));
if (cert == NULL) {
fprintf(stderr, "Cert \n%s\n",
ERR_error_string(ERR_get_error(),
NULL));
rval = -1;
} else {
nid = OBJ_obj2nid(
cert->cert_info->signature->algorithm);
scheme = OBJ_nid2sn(nid);
fprintf(stderr,
"Using scheme %s from %s\n", scheme,
filename);
break;
}
}
scheme = "RSA-MD5";
}
if (pkey != NULL && rval == 0 && !iffsw) {
ectx = EVP_get_digestbyname(scheme);
if (ectx == NULL) {
fprintf(stderr,
"Invalid digest/signature combination %s\n",
scheme);
rval = -1;
} else {
x509(pkey, ectx, grpkey, exten);
}
}
if (pkey_iff != NULL && rval == 0 && iffsw) {
DSA *dsa;
char *sptr;
char *tld;
sptr = strrchr(filename, '.');
tld = malloc(strlen(sptr));
strcpy(tld, 1+sptr);
sprintf(filename, "ntpkey_IFFkey_%s.%s", trustname,
tld);
free(tld);
fprintf(stderr, "Writing new IFF key %s\n", filename);
fprintf(stdout, "# %s\n# %s", filename, ctime(&epoch));
dsa = pkey_iff->pkey.dsa;
BN_copy(dsa->priv_key, BN_value_one());
pkey = EVP_PKEY_new();
EVP_PKEY_assign_DSA(pkey, dsa);
PEM_write_PrivateKey(stdout, pkey, passwd2 ?
EVP_des_cbc() : NULL, NULL, 0, NULL, passwd2);
fclose(stdout);
if (debug)
DSA_print_fp(stdout, dsa, 0);
}
if (grpkey != NULL)
OPENSSL_free(grpkey);
if (pkey_host != NULL)
EVP_PKEY_free(pkey_host);
if (pkey_sign != NULL)
EVP_PKEY_free(pkey_sign);
if (pkey_iff != NULL)
EVP_PKEY_free(pkey_iff);
if (pkey_gq != NULL)
EVP_PKEY_free(pkey_gq);
if (pkey_mv != NULL)
EVP_PKEY_free(pkey_mv);
#endif
return (rval);
}
#if 0
int
gen_md5(
char *id
)
{
BIGNUM *key;
BIGNUM *keyid;
FILE *str;
u_char bin[16];
fprintf(stderr, "Generating MD5 keys...\n");
str = fheader("MD5key", hostname);
keyid = BN_new(); key = BN_new();
BN_rand(keyid, 16, -1, 0);
BN_rand(key, 128, -1, 0);
BN_bn2bin(key, bin);
PEM_write_fp(str, MD5, NULL, bin);
fclose(str);
fslink(id, hostname);
return (1);
}
#else
int
gen_md5(
char *id
)
{
u_char md5key[16];
FILE *str;
u_int temp = 0;
int i, j;
fprintf(stderr, "Generating MD5 keys...\n");
str = fheader("MD5key", hostname);
ntp_srandom(epoch);
for (i = 1; i <= MD5KEYS; i++) {
for (j = 0; j < 16; j++) {
while (1) {
temp = ntp_random() & 0xff;
if (temp == '#')
continue;
if (temp > 0x20 && temp < 0x7f)
break;
}
md5key[j] = (u_char)temp;
}
md5key[15] = '\0';
fprintf(str, "%2d MD5 %16s # MD5 key\n", i,
md5key);
}
fclose(str);
fslink(id, hostname);
return (1);
}
#endif
#ifdef OPENSSL
EVP_PKEY *
gen_rsa(
char *id
)
{
EVP_PKEY *pkey;
RSA *rsa;
FILE *str;
fprintf(stderr, "Generating RSA keys (%d bits)...\n", modulus);
rsa = RSA_generate_key(modulus, 3, cb, "RSA");
fprintf(stderr, "\n");
if (rsa == NULL) {
fprintf(stderr, "RSA generate keys fails\n%s\n",
ERR_error_string(ERR_get_error(), NULL));
rval = -1;
return (NULL);
}
if (!RSA_check_key(rsa)) {
fprintf(stderr, "Invalid RSA key\n%s\n",
ERR_error_string(ERR_get_error(), NULL));
RSA_free(rsa);
rval = -1;
return (NULL);
}
str = fheader("RSAkey", hostname);
pkey = EVP_PKEY_new();
EVP_PKEY_assign_RSA(pkey, rsa);
PEM_write_PrivateKey(str, pkey, passwd2 ? EVP_des_cbc() : NULL,
NULL, 0, NULL, passwd2);
fclose(str);
if (debug)
RSA_print_fp(stdout, rsa, 0);
fslink(id, hostname);
return (pkey);
}
EVP_PKEY *
gen_dsa(
char *id
)
{
EVP_PKEY *pkey;
DSA *dsa;
u_char seed[20];
FILE *str;
fprintf(stderr,
"Generating DSA parameters (%d bits)...\n", modulus);
RAND_bytes(seed, sizeof(seed));
dsa = DSA_generate_parameters(modulus, seed, sizeof(seed), NULL,
NULL, cb, "DSA");
fprintf(stderr, "\n");
if (dsa == NULL) {
fprintf(stderr, "DSA generate parameters fails\n%s\n",
ERR_error_string(ERR_get_error(), NULL));
rval = -1;
return (NULL);
}
fprintf(stderr, "Generating DSA keys (%d bits)...\n", modulus);
if (!DSA_generate_key(dsa)) {
fprintf(stderr, "DSA generate keys fails\n%s\n",
ERR_error_string(ERR_get_error(), NULL));
DSA_free(dsa);
rval = -1;
return (NULL);
}
str = fheader("DSAkey", hostname);
pkey = EVP_PKEY_new();
EVP_PKEY_assign_DSA(pkey, dsa);
PEM_write_PrivateKey(str, pkey, passwd2 ? EVP_des_cbc() : NULL,
NULL, 0, NULL, passwd2);
fclose(str);
if (debug)
DSA_print_fp(stdout, dsa, 0);
fslink(id, hostname);
return (pkey);
}
EVP_PKEY *
gen_iff(
char *id
)
{
EVP_PKEY *pkey;
DSA *dsa;
u_char seed[20];
BN_CTX *ctx;
BIGNUM *b, *r, *k, *u, *v, *w;
FILE *str;
u_int temp;
fprintf(stderr, "Generating IFF parameters (%d bits)...\n",
modulus);
RAND_bytes(seed, sizeof(seed));
dsa = DSA_generate_parameters(modulus, seed, sizeof(seed), NULL,
NULL, cb, "IFF");
fprintf(stderr, "\n");
if (dsa == NULL) {
fprintf(stderr, "DSA generate parameters fails\n%s\n",
ERR_error_string(ERR_get_error(), NULL));
rval = -1;
return (NULL);;
}
fprintf(stderr, "Generating IFF keys (%d bits)...\n", modulus);
b = BN_new(); r = BN_new(); k = BN_new();
u = BN_new(); v = BN_new(); w = BN_new(); ctx = BN_CTX_new();
BN_rand(b, BN_num_bits(dsa->q), -1, 0);
BN_mod(b, b, dsa->q, ctx);
BN_sub(v, dsa->q, b);
BN_mod_exp(v, dsa->g, v, dsa->p, ctx);
BN_mod_exp(u, dsa->g, b, dsa->p, ctx);
BN_mod_mul(u, u, v, dsa->p, ctx);
temp = BN_is_one(u);
fprintf(stderr,
"Confirm g^(q - b) g^b = 1 mod p: %s\n", temp == 1 ?
"yes" : "no");
if (!temp) {
BN_free(b); BN_free(r); BN_free(k);
BN_free(u); BN_free(v); BN_free(w); BN_CTX_free(ctx);
rval = -1;
return (NULL);
}
dsa->priv_key = BN_dup(b);
dsa->pub_key = BN_dup(v);
BN_rand(r, BN_num_bits(dsa->q), -1, 0);
BN_mod(r, r, dsa->q, ctx);
BN_rand(k, BN_num_bits(dsa->q), -1, 0);
BN_mod(k, k, dsa->q, ctx);
BN_mod_mul(v, dsa->priv_key, r, dsa->q, ctx);
BN_add(v, v, k);
BN_mod(v, v, dsa->q, ctx);
BN_mod_exp(u, dsa->g, k, dsa->p, ctx);
BN_mod_exp(v, dsa->g, v, dsa->p, ctx);
BN_mod_exp(w, dsa->pub_key, r, dsa->p, ctx);
BN_mod_mul(v, w, v, dsa->p, ctx);
temp = BN_cmp(u, v);
fprintf(stderr,
"Confirm g^k = g^(k + b r) g^(q - b) r: %s\n", temp ==
0 ? "yes" : "no");
BN_free(b); BN_free(r); BN_free(k);
BN_free(u); BN_free(v); BN_free(w); BN_CTX_free(ctx);
if (temp != 0) {
DSA_free(dsa);
rval = -1;
return (NULL);
}
str = fheader("IFFpar", trustname);
pkey = EVP_PKEY_new();
EVP_PKEY_assign_DSA(pkey, dsa);
PEM_write_PrivateKey(str, pkey, passwd2 ? EVP_des_cbc() : NULL,
NULL, 0, NULL, passwd2);
fclose(str);
if (debug)
DSA_print_fp(stdout, dsa, 0);
fslink(id, trustname);
return (pkey);
}
EVP_PKEY *
gen_gqpar(
char *id
)
{
EVP_PKEY *pkey;
RSA *rsa;
BN_CTX *ctx;
FILE *str;
fprintf(stderr,
"Generating GQ parameters (%d bits)...\n", modulus);
rsa = RSA_generate_key(modulus, 3, cb, "GQ");
fprintf(stderr, "\n");
if (rsa == NULL) {
fprintf(stderr, "RSA generate keys fails\n%s\n",
ERR_error_string(ERR_get_error(), NULL));
rval = -1;
return (NULL);
}
ctx = BN_CTX_new();
BN_rand(rsa->e, BN_num_bits(rsa->n), -1, 0);
BN_mod(rsa->e, rsa->e, rsa->n, ctx);
BN_copy(rsa->d, BN_value_one());
BN_copy(rsa->p, BN_value_one());
BN_copy(rsa->q, BN_value_one());
BN_copy(rsa->dmp1, BN_value_one());
BN_copy(rsa->dmq1, BN_value_one());
BN_copy(rsa->iqmp, BN_value_one());
str = fheader("GQpar", trustname);
pkey = EVP_PKEY_new();
EVP_PKEY_assign_RSA(pkey, rsa);
PEM_write_PrivateKey(str, pkey, passwd2 ? EVP_des_cbc() : NULL,
NULL, 0, NULL, passwd2);
fclose(str);
if (debug)
RSA_print_fp(stdout, rsa, 0);
fslink(id, trustname);
return (pkey);
}
EVP_PKEY *
gen_gqkey(
char *id,
EVP_PKEY *gqpar
)
{
EVP_PKEY *pkey;
RSA *rsa;
BN_CTX *ctx;
BIGNUM *u, *v, *g, *k, *r, *y;
FILE *str;
u_int temp;
fprintf(stderr, "Updating GQ keys (%d bits)...\n", modulus);
ctx = BN_CTX_new(); u = BN_new(); v = BN_new();
g = BN_new(); k = BN_new(); r = BN_new(); y = BN_new();
rsa = gqpar->pkey.rsa;
BN_rand(u, BN_num_bits(rsa->n), -1, 0);
BN_mod(u, u, rsa->n, ctx);
BN_mod_inverse(v, u, rsa->n, ctx);
BN_mod_mul(k, v, u, rsa->n, ctx);
BN_mod_exp(v, v, rsa->e, rsa->n, ctx);
BN_mod_exp(g, u, rsa->e, rsa->n, ctx);
BN_mod_mul(g, g, v, rsa->n, ctx);
temp = BN_is_one(g);
fprintf(stderr,
"Confirm u^b (u^-1)^b = 1 mod n: %s\n", temp ? "yes" :
"no");
if (!temp) {
BN_free(u); BN_free(v);
BN_free(g); BN_free(k); BN_free(r); BN_free(y);
BN_CTX_free(ctx);
RSA_free(rsa);
rval = -1;
return (NULL);
}
BN_copy(rsa->p, u);
BN_copy(rsa->q, v);
BN_rand(r, BN_num_bits(rsa->n), -1, 0);
BN_mod(r, r, rsa->n, ctx);
BN_rand(k, BN_num_bits(rsa->n), -1, 0);
BN_mod(k, k, rsa->n, ctx);
BN_mod_exp(y, rsa->p, r, rsa->n, ctx);
BN_mod_mul(y, k, y, rsa->n, ctx);
BN_mod_exp(g, k, rsa->e, rsa->n, ctx);
BN_mod_exp(v, rsa->q, r, rsa->n, ctx);
BN_mod_exp(y, y, rsa->e, rsa->n, ctx);
BN_mod_mul(y, v, y, rsa->n, ctx);
temp = BN_cmp(y, g);
fprintf(stderr, "Confirm g^k = v^r y^b mod n: %s\n", temp == 0 ?
"yes" : "no");
BN_CTX_free(ctx); BN_free(u); BN_free(v);
BN_free(g); BN_free(k); BN_free(r); BN_free(y);
if (temp != 0) {
RSA_free(rsa);
rval = -1;
return (NULL);
}
str = fheader("GQpar", trustname);
pkey = EVP_PKEY_new();
EVP_PKEY_assign_RSA(pkey, rsa);
PEM_write_PrivateKey(str, pkey, passwd2 ? EVP_des_cbc() : NULL,
NULL, 0, NULL, passwd2);
fclose(str);
if (debug)
RSA_print_fp(stdout, rsa, 0);
fslink(id, trustname);
return (pkey);
}
EVP_PKEY *
gen_mv(
char *id
)
{
EVP_PKEY *pkey, *pkey1;
DSA *dsa;
DSA *sdsa;
BN_CTX *ctx;
BIGNUM **x;
BIGNUM **a;
BIGNUM **g;
BIGNUM **s, **s1;
BIGNUM **xbar, **xhat;
BIGNUM *b;
BIGNUM *b1;
BIGNUM *ss;
BIGNUM *biga;
BIGNUM *bige;
BIGNUM *gbar, *ghat;
BIGNUM *u, *v, *w;
int i, j, n;
FILE *str;
u_int temp;
char ident[20];
n = nkeys;
fprintf(stderr,
"Generating MV parameters for %d keys (%d bits)...\n", n,
modulus / n);
ctx = BN_CTX_new(); u = BN_new(); v = BN_new(); w = BN_new();
b = BN_new(); b1 = BN_new();
dsa = DSA_new();
dsa->p = BN_new();
dsa->q = BN_new();
dsa->g = BN_new();
s = malloc((n + 1) * sizeof(BIGNUM));
s1 = malloc((n + 1) * sizeof(BIGNUM));
for (j = 1; j <= n; j++)
s1[j] = BN_new();
temp = 0;
for (j = 1; j <= n; j++) {
while (1) {
fprintf(stderr, "Birthdays %d\r", temp);
BN_generate_prime(s1[j], modulus / n, 0, NULL,
NULL, NULL, NULL);
for (i = 1; i < j; i++) {
if (BN_cmp(s1[i], s1[j]) == 0)
break;
}
if (i == j)
break;
temp++;
}
}
fprintf(stderr, "Birthday keys rejected %d\n", temp);
temp = 0;
while (1) {
fprintf(stderr, "Duplicate keys rejected %d\r", ++temp);
BN_one(dsa->q);
for (j = 1; j <= n; j++)
BN_mul(dsa->q, dsa->q, s1[j], ctx);
BN_copy(dsa->p, dsa->q);
BN_add(dsa->p, dsa->p, dsa->p);
BN_add_word(dsa->p, 1);
if (BN_is_prime(dsa->p, BN_prime_checks, NULL, ctx,
NULL))
break;
j = temp % n + 1;
while (1) {
BN_generate_prime(u, modulus / n, 0, 0, NULL,
NULL, NULL);
for (i = 1; i <= n; i++) {
if (BN_cmp(u, s1[i]) == 0)
break;
}
if (i > n)
break;
}
BN_copy(s1[j], u);
}
fprintf(stderr, "Duplicate keys rejected %d\n", temp);
BN_copy(v, dsa->p);
BN_sub_word(v, 1);
while (1) {
BN_rand(dsa->g, BN_num_bits(dsa->p) - 1, 0, 0);
BN_mod(dsa->g, dsa->g, dsa->p, ctx);
BN_gcd(u, dsa->g, v, ctx);
if (!BN_is_one(u))
continue;
BN_mod_exp(u, dsa->g, dsa->q, dsa->p, ctx);
if (BN_is_one(u))
break;
}
for (j = 1; j <= n; j++) {
s[j] = BN_new();
BN_add(s[j], dsa->q, s1[j]);
BN_div(s[j], u, s[j], s1[j], ctx);
}
fprintf(stderr,
"Generating polynomial coefficients for %d roots (%d bits)\n",
n, BN_num_bits(dsa->q));
x = malloc((n + 1) * sizeof(BIGNUM));
for (j = 1; j <= n; j++) {
x[j] = BN_new();
while (1) {
BN_rand(x[j], BN_num_bits(dsa->q), 0, 0);
BN_mod(x[j], x[j], dsa->q, ctx);
BN_gcd(u, x[j], dsa->q, ctx);
if (BN_is_one(u))
break;
}
}
a = malloc((n + 1) * sizeof(BIGNUM));
for (i = 0; i <= n; i++) {
a[i] = BN_new();
BN_one(a[i]);
}
for (j = 1; j <= n; j++) {
BN_zero(w);
for (i = 0; i < j; i++) {
BN_copy(u, dsa->q);
BN_mod_mul(v, a[i], x[j], dsa->q, ctx);
BN_sub(u, u, v);
BN_add(u, u, w);
BN_copy(w, a[i]);
BN_mod(a[i], u, dsa->q, ctx);
}
}
fprintf(stderr, "Generating g[i] parameters\n");
g = malloc((n + 1) * sizeof(BIGNUM));
for (i = 0; i <= n; i++) {
g[i] = BN_new();
BN_mod_exp(g[i], dsa->g, a[i], dsa->p, ctx);
}
temp = 1;
for (j = 1; j <= n; j++) {
BN_one(u);
for (i = 0; i <= n; i++) {
BN_set_word(v, i);
BN_mod_exp(v, x[j], v, dsa->q, ctx);
BN_mod_mul(v, v, a[i], dsa->q, ctx);
BN_mod_exp(v, dsa->g, v, dsa->p, ctx);
BN_mod_mul(u, u, v, dsa->p, ctx);
}
if (!BN_is_one(u))
temp = 0;
}
fprintf(stderr,
"Confirm prod(g[i]^(x[j]^i)) = 1 for all i, j: %s\n", temp ?
"yes" : "no");
if (!temp) {
rval = -1;
return (NULL);
}
biga = BN_new();
BN_one(biga);
for (j = 1; j <= n; j++) {
for (i = 0; i < n; i++) {
BN_set_word(v, i);
BN_mod_exp(v, x[j], v, dsa->q, ctx);
BN_mod_exp(v, g[i], v, dsa->p, ctx);
BN_mod_mul(biga, biga, v, dsa->p, ctx);
}
}
while (1) {
BN_rand(b, BN_num_bits(dsa->q), 0, 0);
BN_mod(b, b, dsa->q, ctx);
BN_gcd(u, b, dsa->q, ctx);
if (BN_is_one(u))
break;
}
BN_mod_inverse(b1, b, dsa->q, ctx);
xbar = malloc((n + 1) * sizeof(BIGNUM));
xhat = malloc((n + 1) * sizeof(BIGNUM));
for (j = 1; j <= n; j++) {
xbar[j] = BN_new(); xhat[j] = BN_new();
BN_zero(xbar[j]);
BN_set_word(v, n);
for (i = 1; i <= n; i++) {
if (i == j)
continue;
BN_mod_exp(u, x[i], v, dsa->q, ctx);
BN_add(xbar[j], xbar[j], u);
}
BN_mod_mul(xbar[j], xbar[j], b1, dsa->q, ctx);
BN_mod_exp(xhat[j], x[j], v, dsa->q, ctx);
BN_mod_mul(xhat[j], xhat[j], s[j], dsa->q, ctx);
}
ss = BN_new();
BN_copy(ss, dsa->q);
BN_div(ss, u, dsa->q, s1[n], ctx);
bige = BN_new(); gbar = BN_new(); ghat = BN_new();
BN_mod_exp(bige, biga, ss, dsa->p, ctx);
BN_mod_exp(gbar, dsa->g, ss, dsa->p, ctx);
BN_mod_mul(v, ss, b, dsa->q, ctx);
BN_mod_exp(ghat, dsa->g, v, dsa->p, ctx);
BN_copy(dsa->g, bige);
dsa->priv_key = BN_dup(gbar);
dsa->pub_key = BN_dup(ghat);
str = fheader("MVpar", trustname);
pkey = EVP_PKEY_new();
EVP_PKEY_assign_DSA(pkey, dsa);
PEM_write_PrivateKey(str, pkey, passwd2 ? EVP_des_cbc() : NULL,
NULL, 0, NULL, passwd2);
fclose(str);
if (debug)
DSA_print_fp(stdout, dsa, 0);
fslink(id, trustname);
sdsa = DSA_new();
sdsa->p = BN_dup(dsa->p);
sdsa->q = BN_dup(BN_value_one());
sdsa->g = BN_dup(BN_value_one());
sdsa->priv_key = BN_new();
sdsa->pub_key = BN_new();
for (j = 1; j <= n; j++) {
BN_copy(sdsa->priv_key, xbar[j]);
BN_copy(sdsa->pub_key, xhat[j]);
BN_mod_exp(v, dsa->priv_key, sdsa->pub_key, dsa->p,
ctx);
BN_mod_exp(u, dsa->pub_key, sdsa->priv_key, dsa->p,
ctx);
BN_mod_mul(u, u, v, dsa->p, ctx);
BN_mod_mul(u, u, dsa->g, dsa->p, ctx);
BN_free(xbar[j]); BN_free(xhat[j]);
BN_free(x[j]); BN_free(s[j]); BN_free(s1[j]);
if (!BN_is_one(u)) {
fprintf(stderr, "Revoke key %d\n", j);
continue;
}
sprintf(ident, "MVkey%d", j);
str = fheader(ident, trustname);
pkey1 = EVP_PKEY_new();
EVP_PKEY_set1_DSA(pkey1, sdsa);
PEM_write_PrivateKey(str, pkey1, passwd2 ?
EVP_des_cbc() : NULL, NULL, 0, NULL, passwd2);
fclose(str);
fprintf(stderr, "ntpkey_%s_%s.%lu\n", ident, trustname,
epoch + JAN_1970);
if (debug)
DSA_print_fp(stdout, sdsa, 0);
EVP_PKEY_free(pkey1);
}
for (i = 0; i <= n; i++) {
BN_free(a[i]);
BN_free(g[i]);
}
BN_free(u); BN_free(v); BN_free(w); BN_CTX_free(ctx);
BN_free(b); BN_free(b1); BN_free(biga); BN_free(bige);
BN_free(ss); BN_free(gbar); BN_free(ghat);
DSA_free(sdsa);
free(x); free(a); free(g); free(s); free(s1);
free(xbar); free(xhat);
return (pkey);
}
int
x509 (
EVP_PKEY *pkey,
const EVP_MD *md,
char *gqpub,
char *exten
)
{
X509 *cert;
X509_NAME *subj;
X509_EXTENSION *ex;
FILE *str;
ASN1_INTEGER *serial;
const char *id;
char pathbuf[MAXFILENAME + 1];
id = OBJ_nid2sn(md->pkey_type);
fprintf(stderr, "Generating certificate %s\n", id);
cert = X509_new();
X509_set_version(cert, 2L);
serial = ASN1_INTEGER_new();
ASN1_INTEGER_set(serial, epoch + JAN_1970);
X509_set_serialNumber(cert, serial);
ASN1_INTEGER_free(serial);
X509_time_adj(X509_get_notBefore(cert), 0L, &epoch);
X509_time_adj(X509_get_notAfter(cert), YEAR, &epoch);
subj = X509_get_subject_name(cert);
X509_NAME_add_entry_by_txt(subj, "commonName", MBSTRING_ASC,
(unsigned char *) hostname, strlen(hostname), -1, 0);
subj = X509_get_issuer_name(cert);
X509_NAME_add_entry_by_txt(subj, "commonName", MBSTRING_ASC,
(unsigned char *) trustname, strlen(trustname), -1, 0);
if (!X509_set_pubkey(cert, pkey)) {
fprintf(stderr, "Assign key fails\n%s\n",
ERR_error_string(ERR_get_error(), NULL));
X509_free(cert);
rval = -1;
return (0);
}
fprintf(stderr, "%s: %s\n", LN_basic_constraints,
BASIC_CONSTRAINTS);
ex = X509V3_EXT_conf_nid(NULL, NULL, NID_basic_constraints,
BASIC_CONSTRAINTS);
if (!X509_add_ext(cert, ex, -1)) {
fprintf(stderr, "Add extension field fails\n%s\n",
ERR_error_string(ERR_get_error(), NULL));
rval = -1;
return (0);
}
X509_EXTENSION_free(ex);
fprintf(stderr, "%s: %s\n", LN_key_usage, KEY_USAGE);
ex = X509V3_EXT_conf_nid(NULL, NULL, NID_key_usage, KEY_USAGE);
if (!X509_add_ext(cert, ex, -1)) {
fprintf(stderr, "Add extension field fails\n%s\n",
ERR_error_string(ERR_get_error(), NULL));
rval = -1;
return (0);
}
X509_EXTENSION_free(ex);
if (gqpub != NULL) {
fprintf(stderr, "%s\n", LN_subject_key_identifier);
ex = X509V3_EXT_conf_nid(NULL, NULL,
NID_subject_key_identifier, gqpub);
if (!X509_add_ext(cert, ex, -1)) {
fprintf(stderr,
"Add extension field fails\n%s\n",
ERR_error_string(ERR_get_error(), NULL));
rval = -1;
return (0);
}
X509_EXTENSION_free(ex);
}
if (exten != NULL) {
fprintf(stderr, "%s: %s\n", LN_ext_key_usage, exten);
ex = X509V3_EXT_conf_nid(NULL, NULL,
NID_ext_key_usage, exten);
if (!X509_add_ext(cert, ex, -1)) {
fprintf(stderr,
"Add extension field fails\n%s\n",
ERR_error_string(ERR_get_error(), NULL));
rval = -1;
return (0);
}
X509_EXTENSION_free(ex);
}
X509_sign(cert, pkey, md);
if (!X509_verify(cert, pkey)) {
fprintf(stderr, "Verify %s certificate fails\n%s\n", id,
ERR_error_string(ERR_get_error(), NULL));
X509_free(cert);
rval = -1;
return (0);
}
sprintf(pathbuf, "%scert", id);
str = fheader(pathbuf, hostname);
PEM_write_X509(str, cert);
fclose(str);
if (debug)
X509_print_fp(stdout, cert);
X509_free(cert);
fslink("cert", hostname);
return (1);
}
#if 0
u_long
asn2ntp (
ASN1_TIME *asn1time
)
{
char *v;
struct tm tm;
if (asn1time->length > 13)
return (-1);
v = (char *)asn1time->data;
tm.tm_year = (v[0] - '0') * 10 + v[1] - '0';
if (tm.tm_year < 50)
tm.tm_year += 100;
tm.tm_mon = (v[2] - '0') * 10 + v[3] - '0' - 1;
tm.tm_mday = (v[4] - '0') * 10 + v[5] - '0';
tm.tm_hour = (v[6] - '0') * 10 + v[7] - '0';
tm.tm_min = (v[8] - '0') * 10 + v[9] - '0';
tm.tm_sec = (v[10] - '0') * 10 + v[11] - '0';
tm.tm_wday = 0;
tm.tm_yday = 0;
tm.tm_isdst = 0;
return (mktime(&tm) + JAN_1970);
}
#endif
void
cb (
int n1,
int n2,
void *chr
)
{
switch (n1) {
case 0:
d0++;
fprintf(stderr, "%s %d %d %lu\r", (char *)chr, n1, n2,
d0);
break;
case 1:
d1++;
fprintf(stderr, "%s\t\t%d %d %lu\r", (char *)chr, n1,
n2, d1);
break;
case 2:
d2++;
fprintf(stderr, "%s\t\t\t\t%d %d %lu\r", (char *)chr,
n1, n2, d2);
break;
case 3:
d3++;
fprintf(stderr, "%s\t\t\t\t\t\t%d %d %lu\r",
(char *)chr, n1, n2, d3);
break;
}
}
EVP_PKEY *
genkey(
char *type,
char *id
)
{
if (type == NULL)
return (NULL);
if (strcmp(type, "RSA") == 0)
return (gen_rsa(id));
else if (strcmp(type, "DSA") == 0)
return (gen_dsa(id));
fprintf(stderr, "Invalid %s key type %s\n", id, type);
rval = -1;
return (NULL);
}
#endif
FILE *
fheader (
const char *id,
const char *name
)
{
FILE *str;
sprintf(filename, "ntpkey_%s_%s.%lu", id, name, epoch +
JAN_1970);
if ((str = fopen(filename, "w")) == NULL) {
perror("Write");
exit (-1);
}
fprintf(str, "# %s\n# %s", filename, ctime(&epoch));
return (str);
}
void
fslink(
const char *id,
const char *name
)
{
char linkname[MAXFILENAME];
int temp;
sprintf(linkname, "ntpkey_%s_%s", id, name);
remove(linkname);
temp = symlink(filename, linkname);
if (temp < 0)
perror(id);
fprintf(stderr, "Generating new %s file and link\n", id);
fprintf(stderr, "%s->%s\n", linkname, filename);
}