/* pop a tag */
BOOL asn1_pop_tag(ASN1_DATA *data)
{
struct nesting *nesting;
size_t len;
nesting = data->nesting;
if (!nesting) {
data->has_error = True;
return False;
}
len = data->ofs - (nesting->start+1);
/* yes, this is ugly. We don't know in advance how many bytes the length
of a tag will take, so we assumed 1 byte. If we were wrong then we
need to correct our mistake */
if (len > 0xFFFF) {
data->data[nesting->start] = 0x83;
if (!asn1_write_uint8(data, 0)) return False;
if (!asn1_write_uint8(data, 0)) return False;
if (!asn1_write_uint8(data, 0)) return False;
memmove(data->data+nesting->start+4, data->data+nesting->start+1, len);
data->data[nesting->start+1] = (len>>16) & 0xFF;
data->data[nesting->start+2] = (len>>8) & 0xFF;
data->data[nesting->start+3] = len&0xff;
} else if (len > 255) {
/* push a tag onto the asn1 data buffer. Used for nested structures */
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) {
data->has_error = True;
return False;
}
nesting->start = data->ofs;
nesting->next = data->nesting;
data->nesting = nesting;
return asn1_write_uint8(data, 0xff);
}
/* push a tag onto the asn1 data buffer. Used for nested structures */
bool asn1_push_tag(struct asn1_data *data, uint8_t tag)
{
struct nesting *nesting;
asn1_write_uint8(data, tag);
nesting = talloc(data, struct nesting);
if (!nesting) {
data->has_error = true;
return false;
}
nesting->start = data->ofs;
nesting->next = data->nesting;
data->nesting = nesting;
return asn1_write_uint8(data, 0xff);
}