Symmetric Cryptographic Intel FPGA Hard IP User Guide

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ID 714305
Date 10/02/2023
Public
Document Table of Contents
Document Table of Contents x
1. Introduction 2. Interface Overview 3. Parameters 4. Designing with the IP Core 5. Block Description 6. Cryptographic IP Data Profiles 7. Configuration Registers 8. Design Example 9. Symmetric Cryptographic Intel FPGA Hard IP User Guide Archives 10. Document Revision History for the Symmetric Cryptographic Intel FPGA Hard IP User Guide
1. Introduction x
1.1. Terminology 1.2. IP Core Overview 1.3. Release Information 1.4. Device Family Support 1.5. Resource Utilization
1.2. IP Core Overview x
1.2.1. IP Core Applications
2. Interface Overview x
2.1. Clock Signals 2.2. Reset Signals 2.3. AXI-ST Interface 2.4. AXI-Lite Interface
4. Designing with the IP Core x
4.1. Installing and Licensing Intel® FPGA IP Cores 4.2. Specifying the IP Core Parameters and Options 4.3. Generated File Structure 4.4. Symmetric Cryptographic IP Core Flow 4.5. Dynamically Disabling SM4 Capability 4.6. Error Handling 4.7. Error Reporting 4.8. Resetting the IP Core 4.9. Channel Definition and Allocation 4.10. Byte Ordering 4.11. AXI-ST Single Packet Mode 4.12. AXI-ST Multiple Packet Mode
4.1. Installing and Licensing Intel® FPGA IP Cores x
4.1.1. Intel® FPGA IP Evaluation Mode
4.6. Error Handling x
4.6.1. Detected Error Handling 4.6.2. Key RAM ECC Error Handling
5. Block Description x
5.1. Reset Sequencer 5.2. AXI-ST Ready Latency 5.3. AXI Adapter 5.4. Integrity Check Value Comparison 5.5. GCM Padding and Depadding
5.3. AXI Adapter x
5.3.1. MAC Packing 5.3.2. Data Last Indicator 5.3.3. Stream and Channel ID Buffering 5.3.4. TKEEP and LAST_SEGMENT Signals Generation 5.3.5. MAC Dropping on Decryption
5.5. GCM Padding and Depadding x
5.5.1. GCM Padding 5.5.2. GCM Depadding
6. Cryptographic IP Data Profiles x
6.1. MAC Security Profile (MACsec) 6.2. IP Security Profile (IPsec) 6.3. Generic GCM Profile (GCM) 6.4. Generic XTS Profile (XTS)
6.1. MAC Security Profile (MACsec) x
6.1.1. MACsec Flow 6.1.2. AXI-ST Interface Using MAC Security (MACsec) Profile Pattern
6.2. IP Security Profile (IPsec) x
6.2.1. AXI-ST Interface Using IP Security (IPsec) Profile Pattern
6.3. Generic GCM Profile (GCM) x
6.3.1. AXI- ST Interface Using Generic GCM Profile Pattern
6.4. Generic XTS Profile (XTS) x
6.4.1. AXI-ST Interface Using Generic XTS Profile Pattern
8. Design Example x
8.1. Functional Description 8.2. Crypto VSIP Top Block Descriptions 8.3. Test Configurations 8.4. Software Requirements 8.5. Simulation Requirements 8.6. Steps to Generate the Design Example 8.7. Running Simulation Tests 8.8. Running Hardware Tests
8.2. Crypto VSIP Top Block Descriptions x
8.2.1. Clock and Reset 8.2.2. Host Interface
8.7. Running Simulation Tests x
8.7.1. Steps to Simulate the Design Example
8.8. Running Hardware Tests x
8.8.1. Supported Boards 8.8.2. Steps to Compile the Design Example for Hardware 8.8.3. Steps to Run the Design Example on Hardware
1. Introduction
2. Interface Overview
3. Parameters
4. Designing with the IP Core
5. Block Description
6. Cryptographic IP Data Profiles
7. Configuration Registers
8. Design Example
9. Symmetric Cryptographic Intel FPGA Hard IP User Guide Archives
10. Document Revision History for the Symmetric Cryptographic Intel FPGA Hard IP User Guide

5.4. Integrity Check Value Comparison

The Integrity Check Value (ICV) comparison checks the authentication tag during the packet's decryption. The Symmetric Cryptographic IP core performs the ICV comparison.
Figure 13. ICV Comparison Block and Signals
Follow these steps when performing ICV comparison:
  • You send a packet for decryption. To indicate decryption operation, you set the tuser.encrypt_decrypt appropriately.
  • You send the authentication tag together with the packet when the tlast signal is asserted.
  • The soft logic receives the authentication tag (ICV) and stores it in a FIFO and sends the packet for to the AES/SM4 Inline Cryptographic Accelerator for decryption.
  • When the decryption completes, the AES/SM4 Inline Cryptographic Accelerator asserts the tuser.mac_iv_tweak_en signal. The tdata[127:0] contains the MAC output from the AES/SM4 Inline Cryptographic Accelerator. The soft logic then compares it with the stored authentication tag.
  • A difference between received and stored authentication tags results in the tuser.auth_err signal assertion.
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