Decrypting tcpdumps in Wireshark without key files (such as when FIPS is in use)
Problem this snippet solves: This procedure allows you to decrypt a tcpdump made on the F5 without requiring access to the key file. Despite multiple F5 pages that claim to document this procedure, none of them worked for me. This solution includes the one working iRule I found, trimmed down to the essentials. The bash command is my own, which generates a file with all the required elements from the LTM log lines generated by the iRule, needed to decrypt the tcpdump in Wireshark 3.x. How to use this snippet: Upgrade Wireshark to Version 3+. Apply this iRule to the virtual server targeted by the tcpdump: rule sessionsecret { when CLIENTSSL_HANDSHAKE { log local0.debug "CLIENT_RANDOM [SSL::clientrandom] [SSL::sessionsecret]" log local0.debug "RSA Session-ID:[SSL::sessionid] Master-Key:[SSL::sessionsecret]" } when SERVERSSL_HANDSHAKE { log local0.debug "CLIENT_RANDOM [SSL::clientrandom] [SSL::sessionsecret]" log local0.debug "RSA Session-ID:[SSL::sessionid] Master-Key:[SSL::sessionsecret]" } } Run tcpdump on the F5 using all required hooks to grab both client and server traffic. tcpdump -vvni 0.0:nnnp -s0 host <ip> -w /var/tmp/`date +%F-%H%M`.pcap Conduct tests to reproduce the problem, then stop the tcpdump (Control C) and remove the iRule from the virtual server. Collect the log lines into a file. cat /var/log/ltm | grep -oe "RSA Session.*$" -e "CLIENT_RANDOM.*$" > /var/tmp/pms Copy the .pcap and pms files to the computer running Wireshark 3+. Reference the "pms" file in "Wireshark > Preferences > Protocols > TLS > (Pre)-Master-Secret log filename" (hence the pms file name). Ensure that Wireshark > Analyze > Enabled Protocols > "F5 Ethernet trailer" and "f5ethtrailer" boxes are checked. Open the PCAP file in Wireshark; it will be decrypted. IMPORTANT TIP: Decrypting any large tcpdump brings a workstation to its knees, even to the point of running out of memory. A much better approach is to temporarily move the pms file, open the tcpdump in its default encrypted state, identify the problem areas using filters or F5 TCP conversation and export them to a much smaller file. Then you can move the pms file back to the expected location and decrypt the smaller file quickly and without significant impact on the CPU and memory. Code : Please refer to the "How to use this Code Snippet" section above. This procedure was successfully tested in 12.1.2 with a full-proxy virtual server. Tested this on version: 12.1Breaking Down the Quantum Challenge: Why Post-Quantum Cryptography Can't Wait
The Quantum Challenge is Now Post-quantum cryptography represents the next steps of our digital security evolution. Sure, quantum systems capable of breaking current encryption may still be an a few years away, but those beginning their transition now will be well-positioned for when the crypto hits the fan. Nation-state adversaries and sophisticated private entities may be collecting data today hoping to decrypt it tomorrow so it's never to early to start solving the problem now. It's an excellent time to get ahead of the curve with quantum-resistant cryptography. What does this mean for your organization? Any sensitive data encrypted today using standard methods (RSA, ECDSA) could potentially become readable to future quantum-powered attackers. F5 Community Evangelist Chase Abbott discusses the real world implications of quantum computing, and how you can prepare and migrate to NIST-approved hybrid PQC standards. The transition to post-quantum cryptography represents a perfect opportunity to modernize enterprise PKI practices. Those of you that begin planning today have ample time to implement these changes thoughtfully and strategically, positioning yourselves as leaders in the next generation of cybersecurity; high fives all around. The Business Impact: Beyond Technical Considerations Regulatory and Compliance Pressure Government regulations across the globe are creating concrete deadlines for migration strategies: NSA CNSA 2.0 mandates quantum-resistant algorithms for classified systems by 2030 NIST has standardized post-quantum cryptography algorithms (FIPS 203, 204, 205) Industry regulations in finance, healthcare, and defense are beginning to incorporate quantum-safety requirements adhering to the update FIPS governance Your Quantum-Ready Roadmap: A Manageable Transition Phase 1: Assessment and Inventory Action items for leadership: Conduct cryptographic inventory across all systems and applications Identify critical data requiring long-term protection Assess vendor and third-party quantum readiness Establish quantum cryptography governance and budget allocation Phase 2: Pilot Implementation Strategic focus areas: Deploy quantum-resistant algorithms in non-critical environments Train IT and security teams on post-quantum cryptography Establish partnerships with quantum-ready technology vendors Begin updating security policies and procedures Phase 3: Production Migration Enterprise-wide deployment: Implement hybrid classical/quantum-resistant systems and software Migrate critical applications and PKI aggregation points to quantum-safe algorithms Update business continuity and disaster recovery plans Achieve full compliance with regulatory requirements as a priority over other systems Key Takeaways for Business Leaders Start planning now: The quantum threat timeline is uncertain, but the need for preparation is immediate Prioritize critical assets: Focus initial efforts on protecting your most sensitive and long-lived data Invest in capabilities: Quantum cryptography expertise will become as essential as any other IT security skill Engage stakeholders: Quantum security requires coordination across IT, compliance, procurement, and business units Monitor developments: Stay informed about quantum computing advances and regulatory updates Mahalo! Further Reading: Post Quantum Cryptography Coalition: PQC Migration Roadmap Post Quantum Cryptography Coalition: International PQC Requirements Post Quantum Cryptography Coalition: Inventory Workbook Essence of Linear Algebra Quantum Computing for the Very Curious Looking Glass Universe: Why I Left Quantum Computing Research US National Quantum Initiative
Hands-On Quantum-Safe PKI: A Practical Post-Quantum Cryptography Implementation Guide
Is your Public Key Infrastructure quantum-ready? Remember waaay back when we built the PQC CNSA 2.0 Implementation guide in October 2025? So long ago! Due to popular request, we've expanded the lab to cover the more widely needed NIST FIPS 203/204/205 quantum standards. The below GitHub lab guide will still walk you through building a quantum resistant certificate authority using OpenSSL but we've made some fun adjustments to reflect more real world scenarios. This guide currently covers: Building quantum safe certificate authority for FIPS 203/204/205 use cases Building quantum safe certificate authority for CNSA 2.0 use cases OpenSSL 3.5 parallel install for PQC-specific use cases OpenSSL 3.x + OQS library installation when you cannot update to 3.5.x. Why learn and implement post-quantum cryptography (PQC) now? While quantum computing is a fascinating area of science, all technological advancements can be misused. Nefarious people and nation-states are extracting encrypted data to decrypt at a later date when quantum computers become available, a practice you better know by now called "harvest now, decrypt later." Close your post-quantum cryptographic knowledge gap so you can get secured sooner and reduce the impact(s) that might not surface until later. Ignorance is not bliss when it comes to cryptography and regulatory fines, so let's get started. The GitHub lab provides step-by-step instructions to create: Quantum-resistant Root CA using ML-DSA-87 (FIPS and CNSA 2.0) Algorithm flexibility based on your compliance needs Quantum-safe server and client certificates OCSP and CRL revocation for quantum-resistant certificates Access the Complete Lab Guide on GitHub → At A Glance: OpenSSL Quantum-Resistant CA Learning Paths This repository currently offers two learning tracks. Select the path that aligns with your organization's requirements: FIPS 203/204/205 Path CNSA 2.0 Path Target Audience Commercial organizations, compliance needs Government contractors, classified systems Compliance Standard NIST Quantum Safe FIPS standards NSA Commercial National Security Algorithm Suite 2.0 Algorithm Flexibility Full FIPS algorithm suites (ML-DSA-44/65/87, SLH-DSA) Restricted to CNSA 2.0 approved (ML-DSA-65/87 only) Use Case General quantum-resistant infrastructure National security systems, defense contracts What This Lab Guide Achieves Complete PKI Hierarchy Implementation The lab walks through building an internal PKI infrastructure from scratch, including: Root Certificate Authority: Using ML-DSA-87 providing the highest quantum-ready NIST security level Intermediate Certificate Authority: Intermediate CA using ML-DSA-65 for operational certificate issuance End-Entity Certificates: Server and user certificates with comprehensive Subject Alternative Names (SANs) for real-world applications Revocation Infrastructure: Both Certificate Revocation Lists (CRL) and Online Certificate Status Protocol (OCSP) implementation Security Best Practices: Restrictive Unix file permissions, secure key storage, and backup procedures throughout, preferred practices for lab and internal testing scenarios Key Takeaways After completing one or more of the labs, you will: Understand Quantum Threats: Grasp why current RSA/ECDSA cryptography is vulnerable and how quantum-resistant algorithms provide protection Master ML-DSA Cryptography: Gain hands-on experience with both ML-DSA-65 (Level 3 security) and ML-DSA-87 (Level 5 security) algorithms Configure Modern PKI Features: Implement SANs with DNS, IP, email, and URI entries, plus both CRL and OCSP revocation mechanisms Troubleshoot Effectively: Learn to diagnose and resolve common issues with quantum-resistant certificates Prepare for Migration: Understand the practical steps needed to transition existing PKI infrastructure to quantum-resistant algorithms Who Should Read This Guide Enterprise Security Teams migrating to quantum-resistant algorithms Government Contractors requiring CNSA 2.0 compliance for classified systems Financial Institutions protecting long-term transaction records from quantum threats Healthcare Organizations securing patient data with regulatory requirements Cloud Service Providers implementing quantum-safe infrastructure for customers PKI Consultants preparing for post-quantum migration projects DevOps Engineers building quantum-ready CI/CD certificate pipelines Crossfit Trainers Find something interesting for once to yell at random intervals to anyone within earshot Access the Complete Lab Guide on GitHub → About This Guide We built the first guide for NSA Suite B in the distant past (2017) to learn ECC and modern cipher requirements. We built more recent second guide for CNSA 2.0 but it's quite specific for US federal audiences. That lead us to build a NIST FIPS PQC guide which should apply to more practical use cases. In the spirit of Learn Python the Hard Way, it focuses on manual repetition, hands-on interactions and real-world scenarios. It provides the practical experiences needed to implement quantum-resistant PKI in production environments. By building it on GitHub, other PKI fans can help where we may have missed something; or simply to expand on it with additional modules or forks. Have at it! Frequently Asked Questions (FAQS) Q: What is CNSA 2.0? A: CNSA 2.0 (Commercial National Security Algorithm Suite 2.0) is the NSA's updated cryptographic standard requiring quantum-resistant algorithms. Q: When do I need to implement quantum-resistant cryptography? A: The NSA and NIST mandate CNSA 2.0 and FIPS 20X implementation by 2030. Organizations should begin now due to "harvest now, decrypt later" attacks where adversaries collect encrypted data today for future quantum decryption. Q: What is ML-DSA (Dilithium)? A: ML-DSA (Module-Lattice Digital Signature Algorithm), formerly known as Dilithium, is a NIST-standardized quantum-resistant digital signature algorithm specified in FIPS 204, available in OpenSSL through the OQS provider. Q: What is ML-KEM (Kyber)? A: Kyber is an IND-CCA2-secure key encapsulation mechanism (KEM), whose security is based on the hardness of solving the learning-with-errors (LWE) problem over module lattices. Kyber-512 aims at security roughly equivalent to AES-128, Kyber-768 aims at security roughly equivalent to AES-192, and Kyber-1024 aims at security roughly equivalent to AES-256. But quantumy (it's a word). Q: Is this guide suitable for production use? A: NOPE. While the guide teaches production-ready techniques and CNSA 2.0 compliance, always use Hardware Security Modules (HSMs) and air-gapped systems for production Root CAs (cold storage too). The lab is great for internal environments or test harnesses where you may need to test against new quantum-resistant signatures and such. ALWAYS rely on trusted public PKI infrastructure for production cryptography. Reference Links NIST Post-Quantum Cryptography Standards - Official NIST PQC project page with FIPS 204 (ML-DSA) specifications NSA CNSA 2.0 Algorithm Requirements - NSA's official CNSA 2.0 announcement and requirements Open Quantum Safe Project - Home of the OQS provider enabling quantum-resistant algorithms in OpenSSL OQS Provider for OpenSSL 3 - GitHub repository for the OQS provider with installation instructions RFC 5280: Internet X.509 PKI - Essential standard for X.509 certificate and CRL profiles OpenSSL 3.0 Documentation - Comprehensive OpenSSL documentation for understanding commands and options FIPS 204: ML-DSA Standard - The official Module-Lattice-Based Digital Signature Standard
