/*
* generate an RSA signature key
*
* e is fixed at 3, without discussion. That would not be wise if these
* keys were to be used for encryption, but for signatures there are some
* real speed advantages.
* See also: https://www.imperialviolet.org/2012/03/16/rsae.html
*/
void rsasigkey(int nbits, int seedbits, char *configdir, char *password)
{
SECStatus rv;
PK11RSAGenParams rsaparams = { nbits, (long) E };
secuPWData pwdata = { PW_NONE, NULL };
PK11SlotInfo *slot = NULL;
SECKEYPrivateKey *privkey = NULL;
SECKEYPublicKey *pubkey = NULL;
realtime_t now = realnow();
if (password == NULL) {
pwdata.source = PW_NONE;
} else {
/* check if passwd == configdir/nsspassword */
size_t cdl = strlen(configdir);
size_t pwl = strlen(password);
static const char suf[] = "/nsspassword";
if (pwl == cdl + sizeof(suf) - 1 &&
memeq(password, configdir, cdl) &&
memeq(password + cdl, suf, sizeof(suf)))
pwdata.source = PW_FROMFILE;
else
pwdata.source = PW_PLAINTEXT;
}
pwdata.data = password;
lsw_nss_buf_t err;
if (!lsw_nss_setup(configdir, FALSE/*rw*/, GetModulePassword, err)) {
fprintf(stderr, "%s: %s\n", me, err);
exit(1);
}
#ifdef FIPS_CHECK
if (PK11_IsFIPS() && !FIPSCHECK_verify(NULL, NULL)) {
fprintf(stderr,
"FIPS HMAC integrity verification test failed.\n");
exit(1);
}
#endif
if (PK11_IsFIPS() && password == NULL) {
fprintf(stderr,
"%s: On FIPS mode a password is required\n",
me);
exit(1);
}
/* Good for now but someone may want to use a hardware token */
slot = PK11_GetInternalKeySlot();
/* In which case this may be better */
/* slot = PK11_GetBestSlot(CKM_RSA_PKCS_KEY_PAIR_GEN, password ? &pwdata : NULL); */
/* or the user may specify the name of a token. */
#if 0
if (PK11_IsFIPS() || !PK11_IsInternal(slot)) {
rv = PK11_Authenticate(slot, PR_FALSE, &pwdata);
if (rv != SECSuccess) {
fprintf(stderr, "%s: could not authenticate to token '%s'\n",
me, PK11_GetTokenName(slot));
return;
}
}
#endif /* 0 */
/* Do some random-number initialization. */
UpdateNSS_RNG(seedbits);
/* Log in to the token */
if (password != NULL) {
rv = PK11_Authenticate(slot, PR_FALSE, &pwdata);
if (rv != SECSuccess) {
fprintf(stderr,
"%s: could not authenticate to token '%s'\n",
me, PK11_GetTokenName(slot));
return;
}
}
privkey = PK11_GenerateKeyPair(slot,
CKM_RSA_PKCS_KEY_PAIR_GEN,
&rsaparams, &pubkey,
PR_TRUE,
password != NULL? PR_TRUE : PR_FALSE,
&pwdata);
/* inTheToken, isSensitive, passwordCallbackFunction */
if (privkey == NULL) {
fprintf(stderr,
"%s: key pair generation failed: \"%d\"\n", me,
PORT_GetError());
return;
}
chunk_t public_modulus = {
.ptr = pubkey->u.rsa.modulus.data,
.len = pubkey->u.rsa.modulus.len,
};
chunk_t public_exponent = {
.ptr = pubkey->u.rsa.publicExponent.data,
.len = pubkey->u.rsa.publicExponent.len,
};
char *hex_ckaid;
{
SECItem *ckaid = PK11_GetLowLevelKeyIDForPrivateKey(privkey);
if (ckaid == NULL) {
fprintf(stderr, "%s: 'CKAID' calculation failed\n", me);
exit(1);
}
hex_ckaid = strdup(conv(ckaid->data, ckaid->len, 16));
SECITEM_FreeItem(ckaid, PR_TRUE);
}
/*privkey->wincx = &pwdata;*/
PORT_Assert(pubkey != NULL);
fprintf(stderr, "Generated RSA key pair with CKAID %s was stored in the NSS database\n",
hex_ckaid);
/* and the output */
report("output...\n"); /* deliberate extra newline */
printf("\t# RSA %d bits %s %s", nbits, outputhostname,
ctime(&now.real_secs));
/* ctime provides \n */
printf("\t# for signatures only, UNSAFE FOR ENCRYPTION\n");
printf("\t#ckaid=%s\n", hex_ckaid);
/* RFC2537/RFC3110-ish format */
{
char *bundle = base64_bundle(E, public_modulus);
printf("\t#pubkey=%s\n", bundle);
pfree(bundle);
}
printf("\tModulus: 0x%s\n", conv(public_modulus.ptr, public_modulus.len, 16));
printf("\tPublicExponent: 0x%s\n", conv(public_exponent.ptr, public_exponent.len, 16));
if (hex_ckaid != NULL)
free(hex_ckaid);
if (privkey != NULL)
SECKEY_DestroyPrivateKey(privkey);
if (pubkey != NULL)
SECKEY_DestroyPublicKey(pubkey);
lsw_nss_shutdown(LSW_NSS_CLEANUP);
}
/*
* getrandom - get some random bytes from /dev/random (or wherever)
* NOTE: This is only used for additional seeding of the NSS RNG
*/
void getrandom(size_t nbytes, unsigned char *buf)
{
size_t ndone;
int dev;
ssize_t got;
dev = open(device, 0);
if (dev < 0) {
fprintf(stderr, "%s: could not open %s (%s)\n", me,
device, strerror(errno));
exit(1);
}
ndone = 0;
if (verbose) {
fprintf(stderr, "getting %d random seed bytes for NSS from %s...\n",
(int) nbytes * BITS_PER_BYTE,
device);
}
while (ndone < nbytes) {
got = read(dev, buf + ndone, nbytes - ndone);
if (got < 0) {
fprintf(stderr, "%s: read error on %s (%s)\n", me,
device, strerror(errno));
exit(1);
}
if (got == 0) {
fprintf(stderr, "%s: eof on %s!?!\n", me, device);
exit(1);
}
ndone += got;
}
close(dev);
}
/*
- conv - convert bits to output in specified datatot format
* NOTE: result points into a STATIC buffer
*/
static const char *conv(const unsigned char *bits, size_t nbytes, int format)
{
static char convbuf[MAXBITS / 4 + 50]; /* enough for hex */
size_t n;
n = datatot(bits, nbytes, format, convbuf, sizeof(convbuf));
if (n == 0) {
fprintf(stderr, "%s: can't-happen convert error\n", me);
exit(1);
}
if (n > sizeof(convbuf)) {
fprintf(stderr,
"%s: can't-happen convert overflow (need %d)\n",
me, (int) n);
exit(1);
}
return convbuf;
}
/*
- report - report progress, if indicated
*/
void report(msg)
char *msg;
{
if (!verbose)
return;
fprintf(stderr, "%s\n", msg);
}
/*
* generate an RSA signature key
*
* e is fixed at 3, without discussion. That would not be wise if these
* keys were to be used for encryption, but for signatures there are some
* real speed advantages.
* See also: https://www.imperialviolet.org/2012/03/16/rsae.html
*/
void rsasigkey(int nbits, int seedbits, const struct lsw_conf_options *oco)
{
PK11RSAGenParams rsaparams = { nbits, (long) F4 };
PK11SlotInfo *slot = NULL;
SECKEYPrivateKey *privkey = NULL;
SECKEYPublicKey *pubkey = NULL;
realtime_t now = realnow();
lsw_nss_buf_t err;
if (!lsw_nss_setup(oco->nssdir, 0, lsw_nss_get_password, err)) {
fprintf(stderr, "%s: %s\n", progname, err);
exit(1);
}
#ifdef FIPS_CHECK
if (PK11_IsFIPS() && !FIPSCHECK_verify(NULL, NULL)) {
fprintf(stderr,
"FIPS HMAC integrity verification test failed.\n");
exit(1);
}
#endif
/* Good for now but someone may want to use a hardware token */
slot = lsw_nss_get_authenticated_slot(err);
if (slot == NULL) {
fprintf(stderr, "%s: %s\n", progname, err);
lsw_nss_shutdown();
exit(1);
}
/* Do some random-number initialization. */
UpdateNSS_RNG(seedbits);
privkey = PK11_GenerateKeyPair(slot,
CKM_RSA_PKCS_KEY_PAIR_GEN,
&rsaparams, &pubkey,
PR_TRUE,
PK11_IsFIPS() ? PR_TRUE : PR_FALSE,
lsw_return_nss_password_file_info());
/* inTheToken, isSensitive, passwordCallbackFunction */
if (privkey == NULL) {
fprintf(stderr,
"%s: key pair generation failed: \"%d\"\n", progname,
PORT_GetError());
return;
}
chunk_t public_modulus = {
.ptr = pubkey->u.rsa.modulus.data,
.len = pubkey->u.rsa.modulus.len,
};
chunk_t public_exponent = {
.ptr = pubkey->u.rsa.publicExponent.data,
.len = pubkey->u.rsa.publicExponent.len,
};
char *hex_ckaid;
{
SECItem *ckaid = PK11_GetLowLevelKeyIDForPrivateKey(privkey);
if (ckaid == NULL) {
fprintf(stderr, "%s: 'CKAID' calculation failed\n", progname);
exit(1);
}
hex_ckaid = strdup(conv(ckaid->data, ckaid->len, 16));
SECITEM_FreeItem(ckaid, PR_TRUE);
}
/*privkey->wincx = &pwdata;*/
PORT_Assert(pubkey != NULL);
fprintf(stderr, "Generated RSA key pair with CKAID %s was stored in the NSS database\n",
hex_ckaid);
/* and the output */
libreswan_log("output...\n"); /* deliberate extra newline */
printf("\t# RSA %d bits %s %s", nbits, outputhostname,
ctime(&now.rt.tv_sec));
/* ctime provides \n */
printf("\t# for signatures only, UNSAFE FOR ENCRYPTION\n");
printf("\t#ckaid=%s\n", hex_ckaid);
/* RFC2537/RFC3110-ish format */
{
char *base64 = NULL;
err_t err = rsa_pubkey_to_base64(public_exponent, public_modulus, &base64);
if (err) {
fprintf(stderr, "%s: unexpected error encoding RSA public key '%s'\n",
progname, err);
exit(1);
}
printf("\t#pubkey=%s\n", base64);
pfree(base64);
}
printf("\tModulus: 0x%s\n", conv(public_modulus.ptr, public_modulus.len, 16));
printf("\tPublicExponent: 0x%s\n", conv(public_exponent.ptr, public_exponent.len, 16));
if (hex_ckaid != NULL)
free(hex_ckaid);
if (privkey != NULL)
SECKEY_DestroyPrivateKey(privkey);
if (pubkey != NULL)
SECKEY_DestroyPublicKey(pubkey);
lsw_nss_shutdown();
}
/*
* lsw_random - get some random bytes from /dev/random (or wherever)
* NOTE: This is only used for additional seeding of the NSS RNG
*/
void lsw_random(size_t nbytes, unsigned char *buf)
{
size_t ndone;
int dev;
ssize_t got;
dev = open(device, 0);
if (dev < 0) {
fprintf(stderr, "%s: could not open %s (%s)\n", progname,
device, strerror(errno));
exit(1);
}
ndone = 0;
libreswan_log("getting %d random seed bytes for NSS from %s...\n",
(int) nbytes * BITS_PER_BYTE, device);
while (ndone < nbytes) {
got = read(dev, buf + ndone, nbytes - ndone);
if (got < 0) {
fprintf(stderr, "%s: read error on %s (%s)\n", progname,
device, strerror(errno));
exit(1);
}
if (got == 0) {
fprintf(stderr, "%s: eof on %s!?!\n", progname, device);
exit(1);
}
ndone += got;
}
close(dev);
}
/*
- conv - convert bits to output in specified datatot format
* NOTE: result points into a STATIC buffer
*/
static const char *conv(const unsigned char *bits, size_t nbytes, int format)
{
static char convbuf[MAXBITS / 4 + 50]; /* enough for hex */
size_t n;
n = datatot(bits, nbytes, format, convbuf, sizeof(convbuf));
if (n == 0) {
fprintf(stderr, "%s: can't-happen convert error\n", progname);
exit(1);
}
if (n > sizeof(convbuf)) {
fprintf(stderr,
"%s: can't-happen convert overflow (need %d)\n",
progname, (int) n);
exit(1);
}
return convbuf;
}
/*
* generate an RSA signature key
*
* e is fixed at 3, without discussion. That would not be wise if these
* keys were to be used for encryption, but for signatures there are some
* real speed advantages.
* See also: https://www.imperialviolet.org/2012/03/16/rsae.html
*/
void rsasigkey(int nbits, char *configdir, char *password)
{
SECStatus rv;
PK11RSAGenParams rsaparams = { nbits, (long) E };
secuPWData pwdata = { PW_NONE, NULL };
PK11SlotInfo *slot = NULL;
SECKEYPrivateKey *privkey = NULL;
SECKEYPublicKey *pubkey = NULL;
unsigned char *bundp = NULL;
mpz_t n;
mpz_t e;
size_t bs;
char n_str[3 + MAXBITS / 4 + 1];
realtime_t now = realnow();
mpz_init(n);
mpz_init(e);
if (password == NULL) {
pwdata.source = PW_NONE;
} else {
/* check if passwd == configdir/nsspassword */
size_t cdl = strlen(configdir);
size_t pwl = strlen(password);
static const char suf[] = "/nsspassword";
if (pwl == cdl + sizeof(suf) - 1 &&
memeq(password, configdir, cdl) &&
memeq(password + cdl, suf, sizeof(suf)))
pwdata.source = PW_FROMFILE;
else
pwdata.source = PW_PLAINTEXT;
}
pwdata.data = password;
PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 1);
rv = NSS_InitReadWrite(configdir);
if (rv != SECSuccess) {
fprintf(stderr, "%s: NSS_InitReadWrite(%s) returned %d\n",
me, configdir, PR_GetError());
exit(1);
}
#ifdef FIPS_CHECK
if (PK11_IsFIPS() && !FIPSCHECK_verify(NULL, NULL)) {
fprintf(stderr,
"FIPS HMAC integrity verification test failed.\n");
exit(1);
}
#endif
if (PK11_IsFIPS() && !password) {
fprintf(stderr,
"%s: On FIPS mode a password is required\n",
me);
exit(1);
}
PK11_SetPasswordFunc(GetModulePassword);
/* Good for now but someone may want to use a hardware token */
slot = PK11_GetInternalKeySlot();
/* In which case this may be better */
/* slot = PK11_GetBestSlot(CKM_RSA_PKCS_KEY_PAIR_GEN, password ? &pwdata : NULL); */
/* or the user may specify the name of a token. */
#if 0
if (PK11_IsFIPS() || !PK11_IsInternal(slot)) {
rv = PK11_Authenticate(slot, PR_FALSE, &pwdata);
if (rv != SECSuccess) {
fprintf(stderr, "%s: could not authenticate to token '%s'\n",
me, PK11_GetTokenName(slot));
return;
}
}
#endif /* 0 */
/* Do some random-number initialization. */
UpdateNSS_RNG();
/* Log in to the token */
if (password) {
rv = PK11_Authenticate(slot, PR_FALSE, &pwdata);
if (rv != SECSuccess) {
fprintf(stderr,
"%s: could not authenticate to token '%s'\n",
me, PK11_GetTokenName(slot));
return;
}
}
privkey = PK11_GenerateKeyPair(slot,
CKM_RSA_PKCS_KEY_PAIR_GEN,
&rsaparams, &pubkey,
PR_TRUE,
password ? PR_TRUE : PR_FALSE,
&pwdata);
/* inTheToken, isSensitive, passwordCallbackFunction */
if (!privkey) {
fprintf(stderr,
"%s: key pair generation failed: \"%d\"\n", me,
PORT_GetError());
return;
}
/*privkey->wincx = &pwdata;*/
PORT_Assert(pubkey != NULL);
fprintf(stderr,
"Generated RSA key pair using the NSS database\n");
SECItemToHex(getModulus(pubkey), n_str);
assert(!mpz_set_str(n, n_str, 16));
/* and the output */
report("output...\n"); /* deliberate extra newline */
printf("\t# RSA %d bits %s %s", nbits, outputhostname,
ctime(&now.real_secs));
/* ctime provides \n */
printf("\t# for signatures only, UNSAFE FOR ENCRYPTION\n");
bundp = bundle(E, n, &bs);
printf("\t#pubkey=%s\n", conv(bundp, bs, 's')); /* RFC2537ish format */
printf("\tModulus: %s\n", hexOut(getModulus(pubkey)));
printf("\tPublicExponent: %s\n",
hexOut(getPublicExponent(pubkey)));
SECItem *ckaID = PK11_MakeIDFromPubKey(getModulus(pubkey));
if (ckaID != NULL) {
printf("\t# everything after this point is CKA_ID in hex format - not the real values \n");
printf("\tPrivateExponent: %s\n", hexOut(ckaID));
printf("\tPrime1: %s\n", hexOut(ckaID));
printf("\tPrime2: %s\n", hexOut(ckaID));
printf("\tExponent1: %s\n", hexOut(ckaID));
printf("\tExponent2: %s\n", hexOut(ckaID));
printf("\tCoefficient: %s\n", hexOut(ckaID));
printf("\tCKAIDNSS: %s\n", hexOut(ckaID));
SECITEM_FreeItem(ckaID, PR_TRUE);
}
if (privkey)
SECKEY_DestroyPrivateKey(privkey);
if (pubkey)
SECKEY_DestroyPublicKey(pubkey);
(void) NSS_Shutdown();
(void) PR_Cleanup();
}