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/**
* @file ASN1Message_codec.c
* @brief Implementation for ASN1Message encode and decode functions which transform message payloads to
* and from PER-encoded data, and XER text to and from PER
*
* @see https://www.itu.int/en/ITU-T/asn1/Pages/introduction.aspx
*
* @license GNU General Public License 3.0 - see LICENSE.txt
*/
#include "platform.h"
#include "distribution_codec.h"
#include "../asn.1/ASN1Message.h"
#include "pEp_internal.h"
#include "growing_buf.h"
#include "message_codec.h"
DYNAMIC_API PEP_STATUS decode_ASN1Message_message(
const char *data,
size_t size,
ASN1Message_t **msg
)
{
assert(data && msg);
if (!(data && msg))
return PEP_ILLEGAL_VALUE;
*msg = NULL;
ASN1Message_t *_msg = NULL;
uper_decode_complete(NULL, &asn_DEF_ASN1Message, (void **) &_msg, data, size);
if (!_msg)
return PEP_PEPMESSAGE_ILLEGAL_MESSAGE;
*msg = _msg;
return PEP_STATUS_OK;
}
DYNAMIC_API PEP_STATUS encode_ASN1Message_message(
ASN1Message_t *msg,
char **data,
size_t *size
)
{
assert(data && msg);
if (!(data && msg))
return PEP_ILLEGAL_VALUE;
*data = NULL;
*size = 0;
char *_data = NULL;
ssize_t _size = uper_encode_to_new_buffer(&asn_DEF_ASN1Message, NULL, msg,
(void **) &_data);
if (_size == -1)
return PEP_CANNOT_ENCODE;
*data = _data;
*size = (size_t) _size;
return PEP_STATUS_OK;
}
DYNAMIC_API PEP_STATUS PER_to_XER_ASN1Message_msg(
const char *data,
size_t size,
char **text
)
{
PEP_STATUS status = PEP_STATUS_OK;
growing_buf_t *dst = NULL;
assert(data && text);
if (!(data && text))
return PEP_ILLEGAL_VALUE;
*text = NULL;
ASN1Message_t *msg = NULL;
status = decode_ASN1Message_message(data, size, &msg);
if (status)
goto the_end;
dst = new_growing_buf();
if (!dst) {
status = PEP_OUT_OF_MEMORY;
goto the_end;
}
asn_enc_rval_t er = xer_encode(&asn_DEF_ASN1Message, msg, XER_F_BASIC,
(asn_app_consume_bytes_f *) growing_buf_consume, (void *) dst);
if (er.encoded == -1) {
status = PEP_CANNOT_ENCODE;
goto the_end;
}
*text = dst->data;
dst->data = NULL;
the_end:
free_growing_buf(dst);
free_ASN1Message(msg);
return status;
}
DYNAMIC_API PEP_STATUS XER_to_PER_ASN1Message_msg(
const char *text,
char **data,
size_t *size
)
{
PEP_STATUS status = PEP_STATUS_OK;
assert(text && data && size);
if (!(text && data && size))
return PEP_ILLEGAL_VALUE;
*data = NULL;
*size = 0;
ASN1Message_t *msg = NULL;
asn_dec_rval_t dr = xer_decode(NULL, &asn_DEF_ASN1Message, (void **) &msg,
(const void *) text, strlen(text));
if (dr.code != RC_OK) {
status = PEP_PEPMESSAGE_ILLEGAL_MESSAGE;
goto the_end;
}
char *_data = NULL;
size_t _size = 0;
status = encode_ASN1Message_message(msg, &_data, &_size);
if (status)
goto the_end;
*data = _data;
*size = (size_t) _size;
the_end:
free_ASN1Message(msg);
return status;
}
DYNAMIC_API void free_ASN1Message(
ASN1Message_t *msg
)
{
ASN_STRUCT_FREE(asn_DEF_ASN1Message, msg);
}