- implemented --erase for etoken through a recursive remove

git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@632 c6295689-39f2-0310-b995-f0e70906c6a9

src/pkcs15init/pkcs15-etoken.c

@@ -121,12 +121,108 @@ tlv_len(struct tlv *tlv)
 	return tlv->next - tlv->base;
 }
 
+#if 0
 static int
 etoken_set_ac(struct sc_file *file, int op, struct sc_acl_entry *acl)
 {
 	/* XXX TBD */
 	return 0;
 }
+#endif
+
+/*
+ * Try to delete a file (and, in the DF case, its contents).
+ * Note that this will not work if a pkcs#15 file's ERASE AC
+ * references a pin other than the SO pin.
+ */
+static int
+etoken_rm_rf(struct sc_profile *profile, struct sc_card *card,
+		struct sc_file *df)
+{
+	u8		buffer[1024], *fidp, *end;
+	struct sc_path	path;
+	struct sc_file	*file;
+	int		r = 0;
+
+	if (df->type == SC_FILE_TYPE_DF) {
+		r = sc_list_files(card, buffer, sizeof(buffer));
+		if (r < 0)
+			return r;
+
+		path = df->path;
+		path.len += 2;
+
+		end = buffer + r;
+		for (fidp = buffer; r >= 0 && fidp < end; fidp += 2) {
+			memcpy(path.value + path.len - 2, fidp, 2);
+			r = sc_select_file(card, &path, &file);
+			if (r >= 0) {
+				r = etoken_rm_rf(profile, card, file);
+				sc_file_free(file);
+			}
+		}
+
+		if (r < 0)
+			return r;
+	}
+
+	/* Select the parent DF */
+	path = df->path;
+	path.len -= 2;
+	r = sc_select_file(card, &path, NULL);
+	if (r < 0)
+		return r;
+
+	r = sc_pkcs15init_authenticate(profile, card, df, SC_AC_OP_ERASE);
+	if (r < 0)
+		return r;
+
+	memset(&path, 0, sizeof(path));
+	path.type = SC_PATH_TYPE_FILE_ID;
+	path.value[0] = df->id >> 8;
+	path.value[1] = df->id & 0xFF;
+	path.len = 2;
+	return sc_delete_file(card, &path);
+}
+
+/*
+ * Try to delete pkcs15 structure
+ * file (and, in the DF case, its contents).
+ * This is not quite the same as erasing the whole token, but
+ * it's close enough to be useful.
+ */
+static int
+etoken_erase(struct sc_profile *profile, struct sc_card *card)
+{
+	struct sc_pkcs15_pin_info sopin, temp;
+	struct sc_file	*df = profile->df_info->file;
+	int		r;
+
+	/* Frob: need to tell the upper layers about the SO PIN id */
+	sc_profile_get_pin_info(profile, SC_PKCS15INIT_SO_PIN, &sopin);
+	temp = sopin;
+	temp.reference = ETOKEN_PIN_ID(0);
+	sc_profile_set_pin_info(profile, SC_PKCS15INIT_SO_PIN, &temp);
+
+	r = sc_select_file(card, &df->path, &df);
+	if (r < 0) {
+		if (r == SC_ERROR_FILE_NOT_FOUND)
+			r = 0;
+		goto out;
+	}
+
+	r = etoken_rm_rf(profile, card, df);
+	sc_file_free(df);
+
+	if (r >= 0) {
+		/* Delete 2F00? */
+	}
+
+	/* Unfrob the SO pin reference, and return */
+out:	sc_profile_set_pin_info(profile, SC_PKCS15INIT_SO_PIN, &sopin);
+	return r;
+}
+
 
 /*
  * Initialize pin file
@@ -398,7 +494,7 @@ error(struct sc_profile *profile, const char *fmt, ...)
 }
 
 struct sc_pkcs15init_operations sc_pkcs15init_etoken_operations = {
-	NULL,
+	etoken_erase,
 	etoken_init_app,
 	etoken_put_pin,
 	etoken_new_key,