Microchip ATECC608A-TNGTLS Manual de Usario

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ATECC608A-TNGTLS

ATECC608A-TNGTLS CryptoAuthentication™ Data Sheet

Introduction

The ATECC608A-TNGTLS is a pre-provisioned variant of the ATECC608A. The Trust&GO secure element is part of

Microchip’s family of generically provisioned security-focused devices. The device configuration was designed to

make the secure element applicable to some of the most common use cases in the IoT market, while minimizing the

learning and start-up curves associated with security devices.

This data sheet provides the slot and key configuration information that is unique to the ATECC608A-TNGTLS. This

information clearly defines the access policies of each of the data zone slots. Only relevant command and I/O

operating information has been included. An application section discussing Microchip’s hardware and software tools

that can aid in developing an application is also provided with additional links to the location of the tools.

Features

• Fully Specified Configuration Zone

• I2C Interface with One-Time Changeable I2C Address

• One Permanent Primary P-256 Elliptic Curve Cryptography (ECC secp256r1) Private Key Fixed at

Manufacturing Time

• One Internal Sign Private Key for Key Attestation

• Three Secondary P-256 ECC Private Keys that Can Be Regenerated by the User

• Signer Public Key from Signer Certificate

• IO Protection Key Slot to Protect I2C Communication

• ECDH/KDF Key Slot Capable of Being Used with AES Keys and Commands

• X.509 Compressed Certificate Storage

• Available in 8-Pad UDFN and 8-Pin SOIC Packages in 2k or 100 unit production quantities.

Applications

• Secure IoT TLS 1.2 and 1.3 Connections

Table of Contents

Introduction.....................................................................................................................................................1

Features......................................................................................................................................................... 1

Applications.................................................................................................................................................... 1

1. Pin Configuration and Pinouts.................................................................................................................5

2. EEPROM Memory and Data Zone Access Policies................................................................................6

2.1. ATECC608A-TNGTLS Configuration Zone.................................................................................. 7

2.1.1. Modifiable Configuration Zone Bytes.............................................................................7

2.2. Data Zone and Access Policies....................................................................................................8

2.2.1. Data Zone Data Types...................................................................................................8

2.2.1.1. Private Keys................................................................................................ 8

2.2.1.2. Certificate Storage.......................................................................................9

2.2.1.3. AES Key Storage........................................................................................ 9

2.2.1.4. I/O Protection Key....................................................................................... 9

2.2.1.5. MAC Address............................................................................................ 10

2.2.1.6. General Data Storage............................................................................... 10

2.2.2. Slot Configuration Terminology.................................................................................... 11

2.2.3. ATECC608A-TNGTLS Slot Configuration Summary................................................... 11

2.2.4. ATECC608A-TNGTLS Detailed Slot Access Policies..................................................12

2.3. ATECC608A-TNGTLS EEPROM One Time Programmable (OTP) Zone..................................15

3. Static RAM (SRAM) Memory................................................................................................................ 17

4. General Command Information.............................................................................................................18

4.1. I/O Transactions......................................................................................................................... 18

4.2. Command Packets.....................................................................................................................18

4.3. Status/Error Codes.....................................................................................................................19

4.4. Address Encoding...................................................................................................................... 20

4.4.1. Configuration Zone Addressing................................................................................... 20

4.4.2. OTP Zone Addressing................................................................................................. 20

4.4.3. DataZone Addressing..................................................................................................20

4.5. Formatting of Keys, Signatures and Certificates........................................................................22

4.5.1. ECC Key Formatting....................................................................................................22

4.5.1.1. Public Key Formats................................................................................... 22

4.5.2. Signature Format.........................................................................................................23

4.5.3. Certificate Storage.......................................................................................................23

5. Device Commands................................................................................................................................25

5.1. General Device Commands....................................................................................................... 26

5.1.1. Command....................................................................................................26Counter

5.1.2. Command...........................................................................................................27Info

5.1.2.1. Info - Revision........................................................................................... 27

5.1.2.2. Info - KeyValid........................................................................................... 27

5.1.2.3. Info - Device State.....................................................................................28

5.1.3. Command...........................................................................................................29Lock

ATECC608A-TNGTLS

5.1.3.1. SlotLock.....................................................................................................29

5.1.4. Command........................................................................................................ 29Nonce

5.1.4.1. Nonce - Random....................................................................................... 29

5.1.4.2. Nonce - Fixed............................................................................................ 30

5.1.5. Command...................................................................................................... 30Random

5.1.6. Command...........................................................................................................31Read

5.1.6.1. Clear Text Read.........................................................................................31

5.1.7. Command..................................................................................................31SelfTest

5.1.8. Command.............................................................................................................32SHA

5.1.8.1. SHA - SHA256 Digest............................................................................... 32

5.1.8.2. SHA - HMAC Digest.................................................................................. 33

5.1.8.3. SHA - Context Switching........................................................................... 33

5.1.9. Command........................................................................................... 34UpdateExtra

5.1.10. Command........................................................................................................ 34Write

5.1.10.1. Data Zone - Clear Text Write.....................................................................35

5.2. Asymmetric Cryptography Commands.......................................................................................35

5.2.1. Command...........................................................................................................35ECDH

5.2.1.1. ECDH - Stored Key................................................................................... 35

5.2.1.2. ECDH - TempKey Source..........................................................................36

5.2.2. Command...................................................................................................... 37GenKey

5.2.2.1. Private Key - Stored in Slot....................................................................... 37

5.2.2.2. Private Key - Stored in TempKey.............................................................. 38

5.2.2.3. Public Key Generation...............................................................................38

5.2.2.4. Public Key Digest Generation................................................................... 39

5.2.3. Command...........................................................................................................40Sign

5.2.3.1. Sign - Internal Message............................................................................ 40

5.2.3.2. Sign - External Message........................................................................... 41

5.2.4. Command...................................................................................................... 41Verify

5.2.4.1. Verify - External Public Key Mode............................................................. 41

5.2.4.2. Verify - Stored Public Key Mode................................................................42

5.3. Symmetric Cryptography Commands........................................................................................ 44

5.3.1. Command.............................................................................................................44AES

5.3.1.1. AES-ECB Encrypt..................................................................................... 44

5.3.1.2. AES-ECB Decrypt..................................................................................... 45

5.3.1.3. AES-GFM.................................................................................................. 45

5.3.2. Command..................................................................................................45CheckMac

5.3.3. Command...................................................................................................... 46GenDig

5.3.3.1. GenDig - Config.........................................................................................47

5.3.3.2. GenDig - OTP............................................................................................47

5.3.3.3. GenDig - Data........................................................................................... 48

5.3.3.4. GenDig - Shared Nonce............................................................................49

5.3.3.5. GenDig - Counter...................................................................................... 50

5.3.3.6. GenDig - Key Config................................................................................. 50

5.3.4. Command.............................................................................................................51KDF

5.3.5. Command.............................................................................................................51MAC

5.3.5.1. Non-Diversified MAC.................................................................................52

5.3.5.2. Diversified MAC.........................................................................................52

ATECC608A-TNGTLS

Especificaciones del producto

Marca:	Microchip
Categoría:	No categorizado
Modelo:	ATECC608A-TNGTLS

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