diff options
Diffstat (limited to 'source4/heimdal/lib/asn1/der_length.c')
| -rw-r--r-- | source4/heimdal/lib/asn1/der_length.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/source4/heimdal/lib/asn1/der_length.c b/source4/heimdal/lib/asn1/der_length.c new file mode 100644 index 0000000000..cb07254a67 --- /dev/null +++ b/source4/heimdal/lib/asn1/der_length.c @@ -0,0 +1,175 @@ +/* + * Copyright (c) 1997-2003 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: der_length.c,v 1.16 2004/02/07 14:27:59 lha Exp $"); + +size_t +_heim_len_unsigned (unsigned val) +{ + size_t ret = 0; + + do { + ++ret; + val /= 256; + } while (val); + return ret; +} + +size_t +_heim_len_int (int val) +{ + unsigned char q; + size_t ret = 0; + + if (val >= 0) { + do { + q = val % 256; + ret++; + val /= 256; + } while(val); + if(q >= 128) + ret++; + } else { + val = ~val; + do { + q = ~(val % 256); + ret++; + val /= 256; + } while(val); + if(q < 128) + ret++; + } + return ret; +} + +static size_t +len_oid (const heim_oid *oid) +{ + size_t ret = 1; + int n; + + for (n = 2; n < oid->length; ++n) { + unsigned u = oid->components[n]; + + ++ret; + u /= 128; + while (u > 0) { + ++ret; + u /= 128; + } + } + return ret; +} + +size_t +length_len (size_t len) +{ + if (len < 128) + return 1; + else + return _heim_len_unsigned (len) + 1; +} + +size_t +length_boolean (const int *data) +{ + return 1 + length_len(1) + 1; +} + +size_t +length_integer (const int *data) +{ + size_t len = _heim_len_int (*data); + + return 1 + length_len(len) + len; +} + +size_t +length_unsigned (const unsigned *data) +{ + unsigned val = *data; + size_t len = 0; + + while (val > 255) { + ++len; + val /= 256; + } + len++; + if (val >= 128) + len++; + return 1 + length_len(len) + len; +} + +size_t +length_enumerated (const unsigned *data) +{ + size_t len = _heim_len_int (*data); + + return 1 + length_len(len) + len; +} + +size_t +length_general_string (const heim_general_string *data) +{ + char *str = *data; + size_t len = strlen(str); + return 1 + length_len(len) + len; +} + +size_t +length_octet_string (const heim_octet_string *k) +{ + return 1 + length_len(k->length) + k->length; +} + +size_t +length_oid (const heim_oid *k) +{ + size_t len = len_oid (k); + + return 1 + length_len(len) + len; +} + +size_t +length_generalized_time (const time_t *t) +{ + heim_octet_string k; + size_t ret; + + time2generalizedtime (*t, &k); + ret = 1 + length_len(k.length) + k.length; + free (k.data); + return ret; +} |