From 0e1c703ad85e5ef8eb33a89f33ce466dd54d5a79 Mon Sep 17 00:00:00 2001
From: Michele Balistreri <michele@bitgamma.com>
Date: Tue, 6 Jun 2023 17:14:02 +0200
Subject: [PATCH] add factory reset command

---
 command_set.go            |  6 ++++++
 commands.go               | 13 +++++++++++++
 types/application_info.go |  8 +++++++-
 3 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/command_set.go b/command_set.go
index 220bed7..d2b598d 100644
--- a/command_set.go
+++ b/command_set.go
@@ -423,6 +423,12 @@ func (cs *CommandSet) StoreData(typ uint8, data []byte) error {
 	return cs.checkOK(resp, err)
 }
 
+func (cs *CommandSet) FactoryReset() error {
+	cmd := NewCommandFactoryReset()
+	resp, err := cs.sc.Send(cmd)
+	return cs.checkOK(resp, err)
+}
+
 func (cs *CommandSet) mutualAuthenticate() error {
 	data := make([]byte, 32)
 	if _, err := rand.Read(data); err != nil {
diff --git a/commands.go b/commands.go
index 97452fe..bd9e027 100644
--- a/commands.go
+++ b/commands.go
@@ -12,6 +12,7 @@ import (
 
 const (
 	InsInit                 = 0xFE
+	InsFactoryReset         = 0xFD
 	InsOpenSecureChannel    = 0x10
 	InsMutuallyAuthenticate = 0x11
 	InsPair                 = 0x12
@@ -56,6 +57,8 @@ const (
 	P2ExportKeyPublicOnly           = 0x01
 	P2ExportKeyExtendedPublic       = 0x02
 	P1LoadKeySeed                   = 0x03
+	P1FactoryResetMagic             = 0xAA
+	P2FactoryResetMagic             = 0x55
 
 	SwNoAvailablePairingSlots = 0x6A84
 )
@@ -372,6 +375,16 @@ func NewCommandStoreData(typ uint8, data []byte) *apdu.Command {
 	)
 }
 
+func NewCommandFactoryReset() *apdu.Command {
+	return apdu.NewCommand(
+		globalplatform.ClaGp,
+		InsFactoryReset,
+		P1FactoryResetMagic,
+		P2FactoryResetMagic,
+		[]byte{},
+	)
+}
+
 // Internal function. Get the type of starting point for the derivation path.
 // Used for both DeriveKey and ExportKey
 func derivationP1FromStartingPoint(s derivationpath.StartingPoint) (uint8, error) {
diff --git a/types/application_info.go b/types/application_info.go
index 7eed222..4a3cc26 100644
--- a/types/application_info.go
+++ b/types/application_info.go
@@ -22,11 +22,13 @@ const (
 	CapabilityKeyManagement
 	CapabilityCredentialsManagement
 	CapabilityNDEF
+	CapabilityFactoryReset
 
 	CapabilityAll = CapabilitySecureChannel |
 		CapabilityKeyManagement |
 		CapabilityCredentialsManagement |
-		CapabilityNDEF
+		CapabilityNDEF |
+		CapabilityFactoryReset
 )
 
 type ApplicationInfo struct {
@@ -62,6 +64,10 @@ func (a *ApplicationInfo) HasNDEFCapability() bool {
 	return a.HasCapability(CapabilityNDEF)
 }
 
+func (a *ApplicationInfo) HasFactoryResetCapability() bool {
+	return a.HasCapability(CapabilityFactoryReset)
+}
+
 func ParseApplicationInfo(data []byte) (*ApplicationInfo, error) {
 	info := &ApplicationInfo{
 		Installed: true,