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/*
Unix SMB/Netbios implementation.
Version 3.0
simple SPNEGO routines
Copyright (C) Andrew Tridgell 2001
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
void asn1_free(ASN1_DATA *data)
{
free(data->data);
}
BOOL asn1_check_empty(ASN1_DATA *data)
{
if (data->nesting) return False;
return True;
}
BOOL asn1_write(ASN1_DATA *data, const void *p, int len)
{
if (data->length < data->ofs+len) {
data->data = Realloc(data->data, data->ofs+len);
if (!data->data) return False;
data->length = data->ofs+len;
}
memcpy(data->data + data->ofs, p, len);
data->ofs += len;
return True;
}
BOOL asn1_write_uint8(ASN1_DATA *data, uint8 v)
{
return asn1_write(data, &v, 1);
}
BOOL asn1_push_tag(ASN1_DATA *data, uint8 tag)
{
struct nesting *nesting;
asn1_write_uint8(data, tag);
nesting = (struct nesting *)malloc(sizeof(struct nesting));
if (!nesting) return False;
nesting->start = data->ofs;
nesting->next = data->nesting;
data->nesting = nesting;
asn1_write_uint8(data, 0xff);
return True;
}
BOOL asn1_pop_tag(ASN1_DATA *data)
{
struct nesting *nesting;
size_t len;
nesting = data->nesting;
if (!nesting) {
return False;
}
len = data->ofs - (nesting->start+1);
if (len > 127) {
data->data[nesting->start] = 0x82;
asn1_write_uint8(data, 0);
asn1_write_uint8(data, 0);
memmove(data->data+nesting->start+3, data->data+nesting->start+1, len);
data->data[nesting->start+1] = len>>8;
data->data[nesting->start+2] = len&0xff;
} else {
data->data[nesting->start] = len;
}
data->nesting = nesting->next;
free(nesting);
return True;
}
BOOL asn1_write_OID(ASN1_DATA *data, const char *OID)
{
unsigned v, v2;
char *p = (char *)OID;
asn1_push_tag(data, ASN1_OID);
v = strtol(p, &p, 10);
v2 = strtol(p, &p, 10);
asn1_write_uint8(data, 40*v + v2);
while (*p) {
v = strtol(p, &p, 10);
if (v >= (1<<28)) asn1_write_uint8(data, 0x80 | ((v>>28)&0xff));
if (v >= (1<<21)) asn1_write_uint8(data, 0x80 | ((v>>21)&0xff));
if (v >= (1<<14)) asn1_write_uint8(data, 0x80 | ((v>>14)&0xff));
if (v >= (1<<7)) asn1_write_uint8(data, 0x80 | ((v>>7)&0xff));
asn1_write_uint8(data, v&0x7f);
}
asn1_pop_tag(data);
return True;
}
BOOL asn1_write_OctetString(ASN1_DATA *data, const void *p, size_t length)
{
asn1_push_tag(data, ASN1_OCTET_STRING);
asn1_write(data, p, length);
asn1_pop_tag(data);
return True;
}
BOOL asn1_write_GeneralString(ASN1_DATA *data, const char *s)
{
asn1_push_tag(data, ASN1_GENERAL_STRING);
asn1_write(data, s, strlen(s));
asn1_pop_tag(data);
return True;
}
BOOL asn1_write_BOOLEAN(ASN1_DATA *data, BOOL v)
{
asn1_write_uint8(data, ASN1_BOOLEAN);
asn1_write_uint8(data, v);
return True;
}
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