152 lines
2.9 KiB
C
152 lines
2.9 KiB
C
/**
|
|
* FreeRDP: A Remote Desktop Protocol Client
|
|
* ASN.1 Basic Encoding Rules (DER)
|
|
*
|
|
* Copyright 2011 Samsung, Author Jiten Pathy
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <freerdp/crypto/der.h>
|
|
|
|
int der_write_length(STREAM* s, int length)
|
|
{
|
|
if (length > 0x7F && length <= 0xFF)
|
|
{
|
|
stream_write_uint8(s, 0x81);
|
|
stream_write_uint8(s, length);
|
|
return 2;
|
|
}
|
|
else if (length > 0xFF)
|
|
{
|
|
stream_write_uint8(s, 0x82);
|
|
stream_write_uint16_be(s, length);
|
|
return 3;
|
|
}
|
|
else
|
|
{
|
|
stream_write_uint8(s, length);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
boolean der_write_general_string(STREAM* s, char* str)
|
|
{
|
|
STREAM* tmp_s;
|
|
|
|
tmp_s = stream_new(0);
|
|
stream_attach(tmp_s, (uint8*)str, strlen(str));
|
|
|
|
der_write_universal_tag(s, ER_TAG_GENERAL_STRING, false);
|
|
der_write_length(s, strlen(str));
|
|
|
|
stream_copy(s, tmp_s, strlen(str));
|
|
stream_detach(tmp_s);
|
|
|
|
return true;
|
|
}
|
|
|
|
char* der_read_general_string(STREAM* s, int *length)
|
|
{
|
|
char* str;
|
|
int len;
|
|
|
|
if(der_read_universal_tag(s, ER_TAG_GENERAL_STRING, false))
|
|
{
|
|
der_read_length(s, &len);
|
|
str = (char*)xzalloc((len + 1) * sizeof(char));
|
|
memcpy(str, s->p, len);
|
|
stream_seek(s, len);
|
|
*length = len + 2;
|
|
return str;
|
|
}
|
|
|
|
stream_rewind(s, 1);
|
|
*length = 0;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int der_write_principal_name(STREAM* s, uint8 ntype, char** name)
|
|
{
|
|
uint8 len;
|
|
char** p;
|
|
|
|
len = 0;
|
|
p = name;
|
|
|
|
while (*p != NULL)
|
|
{
|
|
len += strlen(*p) + 2;
|
|
p++;
|
|
}
|
|
|
|
p = name;
|
|
der_write_sequence_tag(s, len+9);
|
|
der_write_contextual_tag(s, 0, 3, true);
|
|
der_write_integer(s, ntype);
|
|
der_write_contextual_tag(s, 1, len + 2, true);
|
|
der_write_sequence_tag(s, len);
|
|
|
|
while (*p != NULL)
|
|
{
|
|
der_write_general_string(s, *p);
|
|
p++;
|
|
}
|
|
|
|
return len + 11;
|
|
}
|
|
|
|
int der_write_generalized_time(STREAM* s, char* tstr)
|
|
{
|
|
uint8 len;
|
|
STREAM* tmp_s;
|
|
|
|
len = strlen(tstr);
|
|
tmp_s = stream_new(0);
|
|
|
|
stream_attach(tmp_s, (uint8*) tstr, strlen(tstr));
|
|
der_write_universal_tag(s, ER_TAG_GENERALIZED_TIME, false);
|
|
der_write_length(s, len);
|
|
|
|
stream_copy(s, tmp_s, len);
|
|
stream_detach(tmp_s);
|
|
|
|
return len + 2;
|
|
}
|
|
|
|
boolean der_read_generalized_time(STREAM* s, char** tstr)
|
|
{
|
|
int length;
|
|
uint8* bm;
|
|
stream_get_mark(s, bm);
|
|
|
|
if (!der_read_universal_tag(s, ER_TAG_GENERALIZED_TIME, false))
|
|
goto err;
|
|
|
|
der_read_length(s, &length);
|
|
|
|
if (length != 15)
|
|
goto err;
|
|
|
|
*tstr = xzalloc(length + 1);
|
|
stream_read(s, *tstr, length);
|
|
|
|
return true;
|
|
|
|
err:
|
|
stream_set_mark(s, bm);
|
|
return false;
|
|
}
|
|
|