several new kerberos related libraries and applications to FreeBSD: o kgetcred(1) allows one to manually get a ticket for a particular service. o kf(1) securily forwards ticket to another host through an authenticated and encrypted stream. o kcc(1) is an umbrella program around klist(1), kswitch(1), kgetcred(1) and other user kerberos operations. klist and kswitch are just symlinks to kcc(1) now. o kswitch(1) allows you to easily switch between kerberos credentials if you're running KCM. o hxtool(1) is a certificate management tool to use with PKINIT. o string2key(1) maps a password into key. o kdigest(8) is a userland tool to access the KDC's digest interface. o kimpersonate(8) creates a "fake" ticket for a service. We also now install manpages for some lirbaries that were not installed before, libheimntlm and libhx509. - The new HEIMDAL version no longer supports Kerberos 4. All users are recommended to switch to Kerberos 5. - Weak ciphers are now disabled by default. To enable DES support (used by telnet(8)), use "allow_weak_crypto" option in krb5.conf. - libtelnet, pam_ksu and pam_krb5 are now compiled with error on warnings disabled due to the function they use (krb5_get_err_text(3)) being deprecated. I plan to work on this next. - Heimdal's KDC now require sqlite to operate. We use the bundled version and install it as libheimsqlite. If some other FreeBSD components will require it in the future we can rename it to libbsdsqlite and use for these components as well. - This is not a latest Heimdal version, the new one was released while I was working on the update. I will update it to 1.5.2 soon, as it fixes some important bugs and security issues.
480 lines
10 KiB
C
480 lines
10 KiB
C
/*
|
|
* Copyright (c) 1997-2005 Kungliga Tekniska Högskolan
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "der_locl.h"
|
|
|
|
RCSID("$Id$");
|
|
|
|
/*
|
|
* All encoding functions take a pointer `p' to first position in
|
|
* which to write, from the right, `len' which means the maximum
|
|
* number of characters we are able to write. The function returns
|
|
* the number of characters written in `size' (if non-NULL).
|
|
* The return value is 0 or an error.
|
|
*/
|
|
|
|
int
|
|
der_put_unsigned (unsigned char *p, size_t len, const unsigned *v, size_t *size)
|
|
{
|
|
unsigned char *base = p;
|
|
unsigned val = *v;
|
|
|
|
if (val) {
|
|
while (len > 0 && val) {
|
|
*p-- = val % 256;
|
|
val /= 256;
|
|
--len;
|
|
}
|
|
if (val != 0)
|
|
return ASN1_OVERFLOW;
|
|
else {
|
|
if(p[1] >= 128) {
|
|
if(len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = 0;
|
|
}
|
|
*size = base - p;
|
|
return 0;
|
|
}
|
|
} else if (len < 1)
|
|
return ASN1_OVERFLOW;
|
|
else {
|
|
*p = 0;
|
|
*size = 1;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int
|
|
der_put_integer (unsigned char *p, size_t len, const int *v, size_t *size)
|
|
{
|
|
unsigned char *base = p;
|
|
int val = *v;
|
|
|
|
if(val >= 0) {
|
|
do {
|
|
if(len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = val % 256;
|
|
len--;
|
|
val /= 256;
|
|
} while(val);
|
|
if(p[1] >= 128) {
|
|
if(len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = 0;
|
|
len--;
|
|
}
|
|
} else {
|
|
val = ~val;
|
|
do {
|
|
if(len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = ~(val % 256);
|
|
len--;
|
|
val /= 256;
|
|
} while(val);
|
|
if(p[1] < 128) {
|
|
if(len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = 0xff;
|
|
len--;
|
|
}
|
|
}
|
|
*size = base - p;
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
der_put_length (unsigned char *p, size_t len, size_t val, size_t *size)
|
|
{
|
|
if (len < 1)
|
|
return ASN1_OVERFLOW;
|
|
|
|
if (val < 128) {
|
|
*p = val;
|
|
*size = 1;
|
|
} else {
|
|
size_t l = 0;
|
|
|
|
while(val > 0) {
|
|
if(len < 2)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = val % 256;
|
|
val /= 256;
|
|
len--;
|
|
l++;
|
|
}
|
|
*p = 0x80 | l;
|
|
if(size)
|
|
*size = l + 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
der_put_boolean(unsigned char *p, size_t len, const int *data, size_t *size)
|
|
{
|
|
if(len < 1)
|
|
return ASN1_OVERFLOW;
|
|
if(*data != 0)
|
|
*p = 0xff;
|
|
else
|
|
*p = 0;
|
|
*size = 1;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
der_put_general_string (unsigned char *p, size_t len,
|
|
const heim_general_string *str, size_t *size)
|
|
{
|
|
size_t slen = strlen(*str);
|
|
|
|
if (len < slen)
|
|
return ASN1_OVERFLOW;
|
|
p -= slen;
|
|
memcpy (p+1, *str, slen);
|
|
*size = slen;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
der_put_utf8string (unsigned char *p, size_t len,
|
|
const heim_utf8_string *str, size_t *size)
|
|
{
|
|
return der_put_general_string(p, len, str, size);
|
|
}
|
|
|
|
int
|
|
der_put_printable_string (unsigned char *p, size_t len,
|
|
const heim_printable_string *str, size_t *size)
|
|
{
|
|
return der_put_octet_string(p, len, str, size);
|
|
}
|
|
|
|
int
|
|
der_put_ia5_string (unsigned char *p, size_t len,
|
|
const heim_ia5_string *str, size_t *size)
|
|
{
|
|
return der_put_octet_string(p, len, str, size);
|
|
}
|
|
|
|
int
|
|
der_put_bmp_string (unsigned char *p, size_t len,
|
|
const heim_bmp_string *data, size_t *size)
|
|
{
|
|
size_t i;
|
|
if (len / 2 < data->length)
|
|
return ASN1_OVERFLOW;
|
|
p -= data->length * 2;
|
|
for (i = 0; i < data->length; i++) {
|
|
p[1] = (data->data[i] >> 8) & 0xff;
|
|
p[2] = data->data[i] & 0xff;
|
|
p += 2;
|
|
}
|
|
if (size) *size = data->length * 2;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
der_put_universal_string (unsigned char *p, size_t len,
|
|
const heim_universal_string *data, size_t *size)
|
|
{
|
|
size_t i;
|
|
if (len / 4 < data->length)
|
|
return ASN1_OVERFLOW;
|
|
p -= data->length * 4;
|
|
for (i = 0; i < data->length; i++) {
|
|
p[1] = (data->data[i] >> 24) & 0xff;
|
|
p[2] = (data->data[i] >> 16) & 0xff;
|
|
p[3] = (data->data[i] >> 8) & 0xff;
|
|
p[4] = data->data[i] & 0xff;
|
|
p += 4;
|
|
}
|
|
if (size) *size = data->length * 4;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
der_put_visible_string (unsigned char *p, size_t len,
|
|
const heim_visible_string *str, size_t *size)
|
|
{
|
|
return der_put_general_string(p, len, str, size);
|
|
}
|
|
|
|
int
|
|
der_put_octet_string (unsigned char *p, size_t len,
|
|
const heim_octet_string *data, size_t *size)
|
|
{
|
|
if (len < data->length)
|
|
return ASN1_OVERFLOW;
|
|
p -= data->length;
|
|
memcpy (p+1, data->data, data->length);
|
|
*size = data->length;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
der_put_heim_integer (unsigned char *p, size_t len,
|
|
const heim_integer *data, size_t *size)
|
|
{
|
|
unsigned char *buf = data->data;
|
|
int hibitset = 0;
|
|
|
|
if (data->length == 0) {
|
|
if (len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = 0;
|
|
if (size)
|
|
*size = 1;
|
|
return 0;
|
|
}
|
|
if (len < data->length)
|
|
return ASN1_OVERFLOW;
|
|
|
|
len -= data->length;
|
|
|
|
if (data->negative) {
|
|
int i, carry;
|
|
for (i = data->length - 1, carry = 1; i >= 0; i--) {
|
|
*p = buf[i] ^ 0xff;
|
|
if (carry)
|
|
carry = !++*p;
|
|
p--;
|
|
}
|
|
if (p[1] < 128) {
|
|
if (len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = 0xff;
|
|
len--;
|
|
hibitset = 1;
|
|
}
|
|
} else {
|
|
p -= data->length;
|
|
memcpy(p + 1, buf, data->length);
|
|
|
|
if (p[1] >= 128) {
|
|
if (len < 1)
|
|
return ASN1_OVERFLOW;
|
|
p[0] = 0;
|
|
len--;
|
|
hibitset = 1;
|
|
}
|
|
}
|
|
if (size)
|
|
*size = data->length + hibitset;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
der_put_generalized_time (unsigned char *p, size_t len,
|
|
const time_t *data, size_t *size)
|
|
{
|
|
heim_octet_string k;
|
|
size_t l;
|
|
int e;
|
|
|
|
e = _heim_time2generalizedtime (*data, &k, 1);
|
|
if (e)
|
|
return e;
|
|
e = der_put_octet_string(p, len, &k, &l);
|
|
free(k.data);
|
|
if(e)
|
|
return e;
|
|
if(size)
|
|
*size = l;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
der_put_utctime (unsigned char *p, size_t len,
|
|
const time_t *data, size_t *size)
|
|
{
|
|
heim_octet_string k;
|
|
size_t l;
|
|
int e;
|
|
|
|
e = _heim_time2generalizedtime (*data, &k, 0);
|
|
if (e)
|
|
return e;
|
|
e = der_put_octet_string(p, len, &k, &l);
|
|
free(k.data);
|
|
if(e)
|
|
return e;
|
|
if(size)
|
|
*size = l;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
der_put_oid (unsigned char *p, size_t len,
|
|
const heim_oid *data, size_t *size)
|
|
{
|
|
unsigned char *base = p;
|
|
int n;
|
|
|
|
for (n = data->length - 1; n >= 2; --n) {
|
|
unsigned u = data->components[n];
|
|
|
|
if (len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = u % 128;
|
|
u /= 128;
|
|
--len;
|
|
while (u > 0) {
|
|
if (len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = 128 + u % 128;
|
|
u /= 128;
|
|
--len;
|
|
}
|
|
}
|
|
if (len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = 40 * data->components[0] + data->components[1];
|
|
*size = base - p;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
der_put_tag (unsigned char *p, size_t len, Der_class class, Der_type type,
|
|
unsigned int tag, size_t *size)
|
|
{
|
|
if (tag <= 30) {
|
|
if (len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p = MAKE_TAG(class, type, tag);
|
|
*size = 1;
|
|
} else {
|
|
size_t ret = 0;
|
|
unsigned int continuation = 0;
|
|
|
|
do {
|
|
if (len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = tag % 128 | continuation;
|
|
len--;
|
|
ret++;
|
|
tag /= 128;
|
|
continuation = 0x80;
|
|
} while(tag > 0);
|
|
if (len < 1)
|
|
return ASN1_OVERFLOW;
|
|
*p-- = MAKE_TAG(class, type, 0x1f);
|
|
ret++;
|
|
*size = ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
der_put_length_and_tag (unsigned char *p, size_t len, size_t len_val,
|
|
Der_class class, Der_type type,
|
|
unsigned int tag, size_t *size)
|
|
{
|
|
size_t ret = 0;
|
|
size_t l;
|
|
int e;
|
|
|
|
e = der_put_length (p, len, len_val, &l);
|
|
if(e)
|
|
return e;
|
|
p -= l;
|
|
len -= l;
|
|
ret += l;
|
|
e = der_put_tag (p, len, class, type, tag, &l);
|
|
if(e)
|
|
return e;
|
|
|
|
ret += l;
|
|
*size = ret;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
_heim_time2generalizedtime (time_t t, heim_octet_string *s, int gtimep)
|
|
{
|
|
struct tm tm;
|
|
const size_t len = gtimep ? 15 : 13;
|
|
|
|
s->data = malloc(len + 1);
|
|
if (s->data == NULL)
|
|
return ENOMEM;
|
|
s->length = len;
|
|
if (_der_gmtime(t, &tm) == NULL)
|
|
return ASN1_BAD_TIMEFORMAT;
|
|
if (gtimep)
|
|
snprintf (s->data, len + 1, "%04d%02d%02d%02d%02d%02dZ",
|
|
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
|
|
tm.tm_hour, tm.tm_min, tm.tm_sec);
|
|
else
|
|
snprintf (s->data, len + 1, "%02d%02d%02d%02d%02d%02dZ",
|
|
tm.tm_year % 100, tm.tm_mon + 1, tm.tm_mday,
|
|
tm.tm_hour, tm.tm_min, tm.tm_sec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
der_put_bit_string (unsigned char *p, size_t len,
|
|
const heim_bit_string *data, size_t *size)
|
|
{
|
|
size_t data_size = (data->length + 7) / 8;
|
|
if (len < data_size + 1)
|
|
return ASN1_OVERFLOW;
|
|
p -= data_size + 1;
|
|
|
|
memcpy (p+2, data->data, data_size);
|
|
if (data->length && (data->length % 8) != 0)
|
|
p[1] = 8 - (data->length % 8);
|
|
else
|
|
p[1] = 0;
|
|
*size = data_size + 1;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
_heim_der_set_sort(const void *a1, const void *a2)
|
|
{
|
|
const struct heim_octet_string *s1 = a1, *s2 = a2;
|
|
int ret;
|
|
|
|
ret = memcmp(s1->data, s2->data,
|
|
s1->length < s2->length ? s1->length : s2->length);
|
|
if(ret)
|
|
return ret;
|
|
return s1->length - s2->length;
|
|
}
|