static int
iso7816_process_fci(struct sc_card *card, struct sc_file *file,
const unsigned char *buf, size_t buflen)
{
struct sc_context *ctx = card->ctx;
size_t taglen, len = buflen;
int i;
const unsigned char *tag = NULL, *p = buf;
sc_log(ctx, "processing FCI bytes");
tag = sc_asn1_find_tag(ctx, p, len, 0x83, &taglen);
if (tag != NULL && taglen == 2) {
file->id = (tag[0] << 8) | tag[1];
sc_log(ctx, " file identifier: 0x%02X%02X", tag[0], tag[1]);
}
/* determine the file size */
/* try the tag 0x80 then the tag 0x81 */
file->size = 0;
for (i = 0x80; i <= 0x81; i++) {
int size = 0;
len = buflen;
tag = sc_asn1_find_tag(ctx, p, len, i, &taglen);
if (tag == NULL)
continue;
if (taglen == 0)
continue;
if (sc_asn1_decode_integer(tag, taglen, &size) < 0)
continue;
if (size <0)
continue;
file->size = size;
sc_log(ctx, " bytes in file: %d", file->size);
break;
}
tag = sc_asn1_find_tag(ctx, p, len, 0x82, &taglen);
if (tag != NULL) {
if (taglen > 0) {
unsigned char byte = tag[0];
const char *type;
file->shareable = byte & 0x40 ? 1 : 0;
sc_log(ctx, " shareable: %s", (byte & 0x40) ? "yes" : "no");
file->ef_structure = byte & 0x07;
switch ((byte >> 3) & 7) {
case 0:
type = "working EF";
file->type = SC_FILE_TYPE_WORKING_EF;
break;
case 1:
type = "internal EF";
file->type = SC_FILE_TYPE_INTERNAL_EF;
break;
case 7:
type = "DF";
file->type = SC_FILE_TYPE_DF;
break;
default:
type = "unknown";
break;
}
sc_log(ctx, " type: %s", type);
sc_log(ctx, " EF structure: %d", byte & 0x07);
}
}
static int
iso7816_process_fci(struct sc_card *card, struct sc_file *file,
const unsigned char *buf, size_t buflen)
{
struct sc_context *ctx = card->ctx;
const unsigned char *p, *end;
unsigned int cla = 0, tag = 0;
size_t length;
int size;
for (p = buf, length = buflen, end = buf + buflen;
p < end;
p += length, length = end - p) {
if (SC_SUCCESS != sc_asn1_read_tag(&p, length, &cla, &tag, &length)
|| p == NULL) {
break;
}
switch (cla | tag) {
case 0x81:
if (file->size != 0) {
/* don't overwrite existing file size excluding structural information */
break;
}
/* fall through */
case 0x80:
/* determine the file size */
if (sc_asn1_decode_integer(p, length, &size) == 0 && size >= 0) {
file->size = size;
sc_log(ctx, " bytes in file: %"SC_FORMAT_LEN_SIZE_T"u",
file->size);
}
break;
case 0x82:
if (length > 0) {
unsigned char byte = p[0];
const char *type;
file->shareable = byte & 0x40 ? 1 : 0;
sc_log(ctx, " shareable: %s", (byte & 0x40) ? "yes" : "no");
file->ef_structure = byte & 0x07;
switch ((byte >> 3) & 7) {
case 0:
type = "working EF";
file->type = SC_FILE_TYPE_WORKING_EF;
break;
case 1:
type = "internal EF";
file->type = SC_FILE_TYPE_INTERNAL_EF;
break;
case 7:
type = "DF";
file->type = SC_FILE_TYPE_DF;
break;
default:
type = "unknown";
break;
}
sc_log(ctx, " type: %s", type);
sc_log(ctx, " EF structure: %d", byte & 0x07);
sc_log(ctx, " tag 0x82: 0x%02x", byte);
if (SC_SUCCESS != sc_file_set_type_attr(file, &byte, 1))
sc_log(ctx, "Warning: Could not set file attributes");
}
break;
case 0x83:
if (length == 2) {
file->id = (p[0] << 8) | p[1];
sc_log(ctx, " file identifier: 0x%02X%02X", p[0], p[1]);
}
break;
case 0x84:
if (length > 0 && length <= 16) {
memcpy(file->name, p, length);
file->namelen = length;
sc_log_hex(ctx, " File name:", file->name, file->namelen);
if (!file->type)
file->type = SC_FILE_TYPE_DF;
}
break;
case 0x85:
case 0xA5:
if (SC_SUCCESS != sc_file_set_prop_attr(file, p, length)) {
sc_log(ctx, "Warning: Could not set proprietary file properties");
}
break;
case 0x86:
if (SC_SUCCESS != sc_file_set_sec_attr(file, p, length)) {
sc_log(ctx, "Warning: Could not set file security properties");
}
break;
case 0x88:
if (length == 1) {
file->sid = *p;
sc_log(ctx, " short file identifier: 0x%02X", *p);
}
break;
case 0x8A:
if (length == 1) {
if (p[0] == 0x01)
file->status = SC_FILE_STATUS_CREATION;
else if (p[0] == 0x07 || p[0] == 0x05)
file->status = SC_FILE_STATUS_ACTIVATED;
else if (p[0] == 0x06 || p[0] == 0x04)
file->status = SC_FILE_STATUS_INVALIDATED;
}
break;
case 0x62:
case 0x64:
case 0x6F:
/* allow nested FCP/FMD/FCI templates */
iso7816_process_fci(card, file, p, length);
}
}
