RECENT BLOG NEWS

So, what’s new at wolfSSL? Take a look below to check out the most recent news, or sign up to receive weekly email notifications containing the latest news from wolfSSL. wolfSSL also has a support-specific blog page dedicated to answering some of the more commonly received support questions.

wolfSSL Adds Support for 0.5-RTT Data in (D)TLS 1.3

(D)TLS 1.3 support for 0.5-RTT (round trip time) data has been introduced to wolfSSL in the latest release (5.6.6). 0.5-RTT data is an optimization in (D)TLS 1.3 that significantly reduces latency and improves overall performance of application data. The full handshake requires two full round trips to start sending data while this functionality allows the server to send application data along with its final flight of handshake messages. This new addition works well with our support for early data (also known as 0-RTT data). An embedded device is able to resume a connection, send early data with its connection request, and receive a response immediately within one RTT.


    	Client                                           	Server

    	ClientHello         	-------->
                                                    	ServerHello
                                          	EncryptedExtensions
                                          	CertificateRequest
                                                 	Certificate
                                           	CertificateVerify
                                                     	Finished
                            	<--------   	0.5-RTT Application Data
    	Certificate
    	CertificateVerify
    	Finished           	-------->
    	Application Data  	<------->    	Application Data

Diagram showing 0.5-RTT data in a full TLS 1.3 handshake

If you would like to learn more about (D)TLS 1.3 in wolfSSL, please contact us at facts@wolfSSL.com or call us at +1 425 245 8247.

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Testing For Your Use Cases

Here at wolfSSL, we love to tout that we have the best tested cryptography library in the world and we stand by that statement 100%. You can even have a look at some of the unit tests in all our products. Simply build any one of our products and execute make check to see our testing in action.

But our testing does not end there. We have a massive continuous integration system that runs tests on:

  • nightly basis
  • weekly basis
  • each time a commit is pushed to a pull request

You can get a hint of what goes on by looking at an active PR for any of our products (https://github.com/wolfSSL/). The content of those tests cannot be made public because some of them contain confidential customer usage patterns.

We test configurations submitted by our Premium support level customers (https://www.wolfssl.com/products/support-and-maintenance/). This allows them to rest assured that when we have a release, their configuration has been tested during development and will not have unpleasant surprises when they integrate it. Are you a Premium support level customer who hasn’t sent in your configuration settings for us to add to our continuous integration system? Do it today!!

Are you a customer that has a unique use case for wolfSSL? Feel free to submit some simple sample code that is similar to how you use it in your product. We will be more than happy to consider it for conversion into a test and get it running on our testing rig. Take control of your destiny for future updates of our products!!

Please reach out to support@wolfSSL.com to get the process started!

If you have questions about any of the above, please contact us at facts@wolfSSL.com or call us at +1 425 45 8247.

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Secure Embedded Systems with wolfSSL: Daniel Stenberg’s cURL Insights at FOSDEM 2024

Get ready to dive into a world of data transfer libraries with Daniel Stenberg, the founder of cURL, at FOSDEM 2024 on February 3rd and 4th in Brussels, Belgium

Daniel Stenberg, the driving force behind cURL, is a featured speaker at FOSDEM 2024 where he will deliver two presentations. The first presentation, “Broom not included: curling the modern way”, is scheduled for February 3rd at 10:50 am CET in Room UB5.230. The second presentation, “You too could have made curl!”, will take place on February 4th at 10 am CET in Room K1.105 (La Fontaine).

Explore the prowess of cURL and libcurl, widely recognized as premier data transfer libraries with URLs for developers. You can expect to gain comprehensive insights during the session, including technical updates, invaluable command lines, the trurl, recently created companion tool for URL manipulations and much more. Join this session to unlock the potential of cURL, elevating your technical skills to the next level. Don’t miss this chance to delve deep into cURL’s capabilities and enhance your skills!

Mark your calendar for insightful talks:

  1. Broom not included: curling the modern way
    • Date: February 3rd, 2024 at 10:50 am CET
    • Location: Room UB5.230
  2. You too could have made curl!
    • Date: February 4th, 2024 at 10 am CET
    • Location: Room K1.105(La Fontaine)

Find wolfSSL and cURL at Building K on level 1, Stand #3 in the IoT area. Daniel Stenberg will be available at stand #3 on February 3rd from 11:30 am to 1:00 pm and February 4th from 11:00 am to 1:00 pm to address your questions. Additionally, cURL and wolfSSL stickers will be available at the stand!

If you have questions about any of the above, please contact us at facts@wolfSSL.com or call us at +1 425 245 8247.

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Live Webinar: Secure and Reliable Firmware Updates with wolfBoot in 2024

Join us for a webinar on ‘Secure and Reliable Firmware Updates with wolfBoot,’ presented by wolfSSL Senior Engineer and security expert, Daniele on February 1st at 10 am PT.

Watch the webinar here: Secure and Reliable Firmware Updates with wolfBoot

Explore the challenges associated with connected embedded systems that allow remote updates of various artifacts and how a secure boot mechanism emerges as a robust solution. In such systems, it is crucial to address security risks. Daniele will provide a comprehensive guide on securing embedded systems, emphasizing the importance of a secure boot mechanism and showcasing wolfBoot as a leading solution in the realm of firmware security.

Don’t miss out on this opportunity to learn the best solutions for securing your firmware. Daniele will take you through the possibilities of real-life secure firmware update solutions, designed using the latest standards and best cryptographic algorithms. Watch it now!

As always, our webinars will include Q&A sessions throughout. If you have questions about any of the above, please contact us at facts@wolfSSL.com or call us at +1 425 245 8247.

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Handshake Message Coalescing Vulnerability

wolfSSL prior to version 5.6.6 had a vulnerability where the (D)TLS key boundaries were not properly checked. As a result, it was possible to combine (D)TLS messages using different keys into one (D)TLS record. The most extreme edge case is that, in (D)TLS 1.3, it was possible that an unencrypted (D)TLS 1.3 record from the server containing first a ServerHello message and then the rest of the first server flight would be accepted by a wolfSSL client. In (D)TLS 1.3 the handshake is encrypted after the ServerHello but a wolfSSL client would accept an unencrypted flight from the server. This does not compromise key negotiation and authentication so it is assigned a low severity rating.

We would like to thank Johannes Wilson for the report (Sectra Communications and Linköping University). The fix for this issue is located in the following GitHub Pull Request: #7029.

If you have questions about any of the above, please contact us at facts@wolfSSL.com or call us at +1 425 245 8247.

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wolfBoot v2.0.0 intel x86_64 support

wolfBoot v2.0.0 introduced support for the Intel x86-64 bit architecture by leveraging the Intel Firmware Support Package (Intel FSP) and several new exciting and interesting features: TPM integration, Multiboot2/ELF support, PCI support, AHCI support, SATA security features, and others.

On Intel x86_64, wolfBoot uses a dual stage design. In the first stage, It initializes the memory and the hardware with the help of Intel FSP. Intel FSP allows BIOS and bootloader developers to focus on the critical features and broad support without worrying about the hardware initialization details. After the memory and silicon initialization, wolfBoot enumerates and configures all PCI devices in the system.

In the second stage, when the hardware is up and ready, wolfBoot does the necessary steps to read, decrypt, verify, and safely boot the main application. We added support for AHCI controller, SATA disks and ATA security commands: the main application can now be stored in a password-locked hard drive!

In both stages, wolfBoot verifies each component loaded, either from system ROM or from the hard disk, plus the TPM support allows very interesting scenarios. First, it enables TPM-assisted measured boot: each component loaded into the system is “measured”, taking part in an integrity proof managed inside the TPM itself so that certain operations are allowed only if the system is in a trustful state. The TPM can store (“seal”) secrets that can be recovered (“unsealed”) only if the system is in a precise state. If compromised software is running on the target, the secret never leaves the TPM.

In wolfBoot we leverage this by sealing the disk password (randomly generated at the first boot) in the TPM and binding the unsealing to a precise state of the system. If the loaded components are compromised or if the disk is removed from the device for direct tampering, the disk can’t be unlocked at all!

Once the disk is unlocked, it’s time to load the application in the right place and communicate the current hardware situation before booting. wolfboot supports the Multiboot2 standards to communicate with the main application and it supports the Executable and Linkable Format (ELF) format, one of the most ubiquitous object file formats for binary distribution, to load the application in the right places into the memory. As it supports memory virtualization, the application can be loaded anywhere in the address space, even above the 4GB limit.

And, as always, all current features of wolfBoot such as verified boot, OTA firmware secure update with power-fail tolerance, delta updates, encrypted firmware, and post-quantum firmware verification, will be directly available on the Intel x86-64 architecture.

All these new features are supported on the VX3060 Kontron board and can be tested on QEMU, but new hardware will be supported soon. If you have a new Intel-based board you would like to have supported or for any other comments, feedback or questions, don’t hesitate to contact us at facts@wolfSSL.com or call us at +1 425 245 8247.

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Sniffing TLS Traffic

Do you have a need to capture and/or analyze TLS traffic? The wolfSSL library includes a useful tool that you can leverage. The wolfSSL sniffer can be used to capture TLS packets and even decrypt them when at least one of the keys is known. This can be done with both live and recorded PCAP traces.

This could be useful for several reasons, including:

  • Analyzing Network Problems
  • Detecting network misuse by internal and external users
  • Monitoring network usage and data in motion
  • Debugging client/server communications

The sniffer supports both TLS v1.2 and TLS v1.3. It can be integrated into any application using our sniffer API’s and it even comes with a complete working example!

See here for more detailed documentation.

Have any questions, comments, or suggestions? Contact us at facts@wolfSSL.com or call us at +1 425 245 8247.

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wolfSSL Rust Wrapper coming soon

Rust support is coming to wolfSSL this year! The wolfSSL embedded TLS library is a lightweight, portable, C-language-based SSL/TLS library known for its low footprint, speed, and feature set. Users have been able to take advantage of our library not only in C but also in their Java, C#, Python, and JavaScript projects using the various wrappers we provide. This year, we’re planning to add Rust to that list.

Similar to C, Rust is a low-level programming language with direct access to hardware and memory, which will make our wolfSSL Rust Wrapper a great SSL/TLS solution for embedded and IoT development for Rust projects. The wrapper will also service Rust users with performance and/or FIPS requirements.

Are you interested in a Rust wrapper?

If you have questions about any of the above, please contact us at facts@wolfSSL.com or call us at +1 425 245 8247.

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Live Webinar: Medical Device Security: Key Strategies for Cybersecurity and Data Protection

You are invited to join a webinar on “Medical Device Security: Key Strategies for Cybersecurity and Data Protection” scheduled for January 25th at 10 am PT. wolfSSL’s Senior Software Engineer, Eric, will delve into the topic of medical device security. As the complexity and connectivity of medical devices have increased, it is essential to maintain a high-quality security system to safeguard your data. Eric will showcase various use cases, demonstrate how wolfSSL products can enhance your security systems, explain the reasons why people choose wolfSSL for medical devices, and much more.

Watch the webinar here: Medical Device Security: Key Strategies for Cybersecurity and Data Protection

Don’t miss out on this opportunity to learn how you can protect your data from threats and provide peace of mind to your patients. Register today, and let us show you how you can leverage your security with wolfSSL!

As always, our webinars will include Q&A sessions throughout. If you have questions about any of the above, please contact us at facts@wolfSSL.com or call us at +1 425 245 8247.

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The Quantum Arena

It is always very interesting to see news articles about technical advances in the Quantum Arena. For example: https://www.scmp.com/news/china/science/article/3246752/china-and-russia-test-hack-proof-quantum-communication-link-brics-countries

This article talks about cooperation between China and Russia to make QKD (Quantum Key Distribution) between the two countries a reality. While only an experiment, this is a landmark achievement for the BRICS group of countries.

This is a great reminder that at a nation state level, most countries are diplomatically friendly while at the same time locked in fierce competition to gain technical superiority over each other. The Quantum Arena is one of those places where competition occurs. Of course, one of the other aspects of this arena is quantum computing. As the “Five Eyes” countries pour resources into developing quantum computers, so too do the BRICS countries. As competition heats up, it seems efforts are being redoubled to get to the first CRQC (Cryptographically Relevant Quantum Computer) on both sides.

Will you be ready upon the arrival of the first CRQC?

If you have questions about any of the above, please contact us at facts@wolfSSL.com or call us at +1 425 245 8247.

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