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wolfSSL, a TLS library for embedded devices, not only handles the TLS protocol, but also supports bundle file handling functions specified by PKCS#7 (bundle file encoding, decoding, content extraction, signature verification). wolfSSL continues to extend this PKCS#7 handling functionality.

wolfSSL is currently extending our wc_PKCS7_VerifySignedData() API to handle PKCS#7 bundle data with multipart and indefinite length content in a streaming manner. This enhancement allows bundle data with relatively large content to be served sequentially by streaming, rather than buffering it all and then processing it.

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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wolfSSL release 5.6.4 includes support for Kerberos 5 1.21.1. Kerberos is a network authentication protocol using modern cryptography to secure communications. The cryptography in the protocol is strong enough so that a client can prove its identity to a server (and vice versa) across an insecure network connection. You can improve the security of Kerberos to a FIPS 140-2 (and 140-3 coming soon!) level by using wolfSSL as the cryptographic and TLS backend.

wolfSSL and wolfCrypt are Federal Information Processing Standards (FIPS) 140-2 certified. This is a mandatory standard for the protection of sensitive or valuable data within Federal systems. We are working very hard on certifying our products to FIPS 140-3. wolfSSL and wolfCrypt will be FIPS 140-3 certified very soon. By using wolfSSL, you can achieve a full (D)TLS 1.3 connection that is fully FIPS compliant.

For more information about using Kerberos with wolfSSL or FIPS certification, please contact us at facts@wolfSSL.com or call us at +1 425 245 8247.

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Join us for the highly anticipated FIPS 140-3 webinar! Save the date for our insightful session, ‘FIPS 140-3 OE Additions and Planning for 2024 and Beyond,’ led by wolfSSL’s Senior Software Engineer, Kaleb, scheduled for December 7th at 10 am PT. wolfSSL, a leader in embedded FIPS certificates, is on the verge of certifying wolfCrypt for FIPS 140-3.

Save the date: December 7th at 10am PT

Discover the latest updates and exciting news during this webinar, including:

• Progress updates and status of our FIPS 140-3 pursuit
• Notable differences between 140-2 and 140-3 standards
• Insights on Post-Quantum and NSA 2.0 Suite
• Engage with us during Q&A, offering input for our next submission

In this session, Kaleb will share exclusive insights into FIPS 140-3, providing valuable information to align your projects with FIPS requirements. Register now while seats last! Please note, webinar content may be subject to change.

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

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In wolfSSL release 5.6.4, we have updated support for Nginx versions 1.24.0 and 1.25.0. Nginx is a high-performance, high-concurrency web server which is compact, fast, and highly scalable. This makes wolfSSL a good choice for the TLS backend. wolfSSL is an embedded SSL/TLS library which supports a wide range of architectures and operating systems.

The instructions to build Nginx with wolfSSL can be found at https://github.com/wolfSSL/wolfssl-nginx

If you have any questions about using Nginx with wolfSSL, please contact us at facts@wolfSSL.com or call us at +1 425 245 8247.

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The wolfSSL implementation of DTLS 1.3 supports Early Data or 0-RTT Data. Early Data is application data that can be sent by the client with the very first ClientHello message. It is also called 0-RTT Data because it requires 0 Round Trip Time before application data can be sent. To utilize Early Data in DTLS 1.3, the server needs to omit the cookie exchange when using a PSK connection. The handshake using Early Data is presented in the following figure.

	Client                                      	Server
    	ClientHello
    	+ early_data
    	+ key_share
    	+ psk_key_exchange_modes
    	+ pre_shared_key
    	Early Data       	      -------->
                                                    	ServerHello
                                               	      + pre_shared_key
                                                   	+ key_share
                                                      EncryptedExtensions
                                                  	+ early_data
                                                     	Finished
                            	<--------   	      Application Data
    	EndOfEarlyData
    	Finished          	-------->
    	Application Data  	<------->    	      Application Data

To use DTLS 1.3 Early Data in wolfSSL without the cookie exchange, the server needs to be modified:

• Compile wolfSSL with WOLFSSL_DTLS13_NO_HRR_ON_RESUME defined
  • When compiling with configure add CPPFLAGS=-DWOLFSSL_DTLS13_NO_HRR_ON_RESUME
  • When compiling with user settings add #define WOLFSSL_DTLS13_NO_HRR_ON_RESUME
• Call wolfSSL_dtls13_no_hrr_on_resume(ssl, 1) on the WOLFSSL object to disable the cookie exchange on resumption
• Continue like with a normal connection

Early Data is protected by using the cipher material associated with the PSK (pre-shared key). This can either be the cipher material of the previous connection when using a ticket or out-of-band cipher material when using a real PSK. As a result of using previous cipher material, Early Data can compromise PFS (Perfect Forward Secrecy).

For any questions about DTLS 1.3 and Early Data in wolfSSL, please contact us at facts@wolfssl.com or call us at +1 425 245 8247.

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We at wolfSSL are continuously improving performance of the wolfCrypt code. Recently we took a look at our AES-GCM on Aarch64 and thought: we can do better.

By using the cryptographic instructions built into Aarch64 chips we had already gotten a significant boost over straight C but we saw that we could do more. By unrolling loops, interleaving the GCM calculation with AES encryption and using NEON as well as the base instructions at the same time, we were able to see a significant improvement!

How significant? Up to 9.5 times faster! The wolfSSL 5.6.4 numbers on an Apple M1 were:

------------------------------------------------------------------------------
 wolfSSL version 5.6.4
------------------------------------------------------------------------------
wolfCrypt Benchmark (block bytes 1048576, min 1.0 sec each)
AES-128-GCM-enc           1845 MB took 1.000 seconds, 1845.382 MB/s
AES-128-GCM-dec            907 MB took 1.005 seconds,  902.210 MB/s
AES-192-GCM-enc           1845 MB took 1.002 seconds, 1842.527 MB/s
AES-192-GCM-dec            902 MB took 1.002 seconds,  900.038 MB/s
AES-256-GCM-enc           1845 MB took 1.000 seconds, 1844.793 MB/s
AES-256-GCM-dec            897 MB took 1.001 seconds,  895.873 MB/s
Benchmark complete

And now with the new assembly code:

------------------------------------------------------------------------------
 wolfSSL version master
------------------------------------------------------------------------------
wolfCrypt Benchmark (block bytes 1048576, min 1.0 sec each)
AES-128-GCM-enc           8583 MB took 1.000 seconds, 8580.862 MB/s
AES-128-GCM-dec           8583 MB took 1.000 seconds, 8580.389 MB/s
AES-192-GCM-enc           7875 MB took 1.001 seconds, 7870.179 MB/s
AES-192-GCM-dec           7922 MB took 1.000 seconds, 7921.097 MB/s
AES-256-GCM-enc           7067 MB took 1.000 seconds, 7064.394 MB/s
AES-256-GCM-dec           7230 MB took 1.001 seconds, 7225.034 MB/s
Benchmark complete

Try it out and you will see that the encryption and decryption of TLS packets will appear insignificant.

Are there other algorithms on Aarch64 whose performance you would like to see us improve? Let us know!

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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wolfEntropy, a software-based entropy source developed by the wolfSSL team, leverages timing jitter variations in memory accesses across various cache levels to generate entropy. It has been available since wolfSSL v5.5.4, and support for Windows has been introduced. This eliminates the need for hardware redesign to incorporate a hardware-based entropy source.
The first general purpose high performance software entropy source is available now!

It is designed to fully conform with SP800-90B. The SP800-90B is a publication by the National Institute of Standards and Technology (NIST) that specifies the requirements for entropy sources used in cryptographic applications.

The wolfEntropy library source is undergoing testing to meet the criteria of a certified entropy source as outlined in the publication. It will soon proceed through the FIPS Entropy Source Validation (ESV) process.

The design of wolfEntropy is depicted in this figure:

When dealing with Unix-style systems that employ autoconf/autotools for configuring the wolfCrypt cryptographic module and integrating wolfEntropy as a component, you need to adhere to these basic configuration prerequisites:

Using Auto-tools:

./configure –enable-entropy-memuse=nofallback

Enabling the nofallback feature is crucial in this context. It restricts the system from using any other entropy source apart from wolfEntropy, even if wolfEntropy experiences a failure in any of its health tests. This strict condition ensures SP800-90B compliance.

For Windows and systems using user_settings.h to fine-tune the wolfCrypt cryptographic module along with wolfEntropy as a component, you can configure your CFLAGS with the following options:

CFLAGS=”-DHAVE_ENTROPY_MEMUSE -DWOLFSSL_SHA3 -DENTROPY_MEMUSE_FORCE_FAILURE”

Much like the Unix-style systems, the ENTROPY_MEMUSE_FORCE_FAILURE option is pivotal. It disables the use of any other entropy source, allowing only wolfEntropy to be utilized. This adherence to ENTROPY_MEMUSE_FORCE_FAILURE ensures SP800-90B compliance.

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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Join us on an informative webinar about wolfSSL and Automotive Hardware Security Modules (HSMs) presented by wolfSSL Software Engineer, Bill, on November 30th at 10 am PT. In today’s automotive landscape, vehicles have transformed into sophisticated digital systems, making automotive cybersecurity a paramount concern.

During this webinar, Bill will delve into the world of HSMs and explore how wolfSSL is dedicated to safeguarding data in connected vehicles.

Save the date: November 30th at 10 am PT

Sneak peek of the webinar

• Automotive HSM Features and benefits
• Exploring wolfHSM Functional Design
• wolfHSM Applicability to Standards
• wolfHSM Hardware Ports and Plans
• wolfHSM Demo on Infineon Aurix Tricore TC3xx
• Future Targets of wolfHSM technology
• And much more

Don’t miss this opportunity to expand your knowledge and technical skills in Automotive HSMs. Discover the full potential that wolfSSL products can offer and how wolfSSL products enhance automotive security. Bring all your questions related to Automotive HSMs and get ready to learn insights on automotive HSMS from Bill.

Seats are limited, so make sure to Register Now!

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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As many people know, Chinese government regulators are now mandating use of SM2, SM3 and SM4 in critical systems, including automobiles, avionics, power systems, and communication systems. Since many of our customers are multi-nationals that do business in China, they have been requesting the addition of these algorithms in wolfSSL products.

Today we are about to release our supported versions of SM2, SM3, and SM4, with the intention to release the ZUC stream cipher at some point this year to completely satisfy SM9. We are also in contact with labs regarding support of OSCCA certification at some point in the future.

This is really great news for our customers selling into Chinese markets!

For those readers considering using wolfSSL products, here’s some additional notes:

• The SM Ciphers will be fully supported in wolfSSL’s TLS 1.3 implementation.
• wolfSSH, wolfBoot and our other products will support ShangMi ciphers.
• ARM, Intel, and RiscV assembly is in the works for our SM implementations for maximum performance.
• We will continue to support bare metal for ZUC, SM2, SM3, and SM4.
• True to form, we have maximized performance and minimized size, so the ShangMi algorithms will work well for embedded systems use cases on a wide variety of microcontrollers (MCU’s). They will be available for all of the MCU silicon that we currently support, including STM32, NXP i.MX, RISC-V, Renesas RA, RX, and Synergy, Nordic NRF32, Microchip PIC32, Infineon Aurix, TI MSP, and many others.
• Our GPLv2 licensed versions of the SM ciphers will be made available on GitHub and for download.

Commercially licensed versions are available.

If you have questions about our support for the ShangMi ciphers and algorithms, please contact us at facts@wolfSSL.com, or call us at +1 425 245 8247.

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In WolfSSL release v5.6.4 we have added support for Silicon Labs’ Simplicity Studio. In addition we have tested with the ERF32xG21 series of chips and have created an example setup. More information can be found in the WolfSSL repo.

Using our benchmarking tool, we have the following results from a Cortex M33 at 80MHz:

wolfCrypt Benchmark	(block bytes 1024, min 1.0 sec each)
RNG	200 KiB took 1.057 seconds	189.215 KiB/s
AES-128-CBC-enc	6 MiB took 1.000 seconds	5.542 MiB/s
AES-128-CBC-dec	6 MiB took 1.000 seconds	5.518 MiB/s
AES-192-CBC-enc	5 MiB took 1.001 seconds	5.415 MiB/s
AES-192-CBC-dec	5 MiB took 1.001 seconds	5.390 MiB/s
AES-256-CBC-enc	5 MiB took 1.004 seconds	5.301 MiB/s
AES-256-CBC-dec	5 MiB took 1.001 seconds	5.268 MiB/s
AES-128-GCM-enc	5 MiB took 1.003 seconds	4.844 MiB/s
AES-128-GCM-dec	5 MiB took 1.003 seconds	4.625 MiB/s
AES-192-GCM-enc	5 MiB took 1.002 seconds	4.751 MiB/s
AES-192-GCM-dec	5 MiB took 1.002 seconds	4.532 MiB/s
AES-256-GCM-enc	5 MiB took 1.002 seconds	4.654 MiB/s
AES-256-GCM-dec	4 MiB took 1.000 seconds	4.443 MiB/s
AES-128-GCM-enc-no_AAD	5 MiB took 1.004 seconds	4.888 MiB/s
AES-128-GCM-dec-no_AAD	5 MiB took 1.001 seconds	4.658 MiB/s
AES-192-GCM-enc-no_AAD	5 MiB took 1.000 seconds	4.785 MiB/s
AES-192-GCM-dec-no_AAD	5 MiB took 1.000 seconds	4.565 MiB/s
AES-256-GCM-enc-no_AAD	5 MiB took 1.004 seconds	4.693 MiB/s
AES-256-GCM-dec-no_AAD	4 MiB took 1.003 seconds	4.479 MiB/s
GMAC Small	5 MiB took 1.000 seconds	4.653 MiB/s
CHACHA	2 MiB took 1.012 seconds	1.809 MiB/s
CHA-POLY	1 MiB took 1.006 seconds	1.189 MiB/s
POLY1305	5 MiB took 1.004 seconds	5.082 MiB/s
SHA	8 MiB took 1.000 seconds	7.812 MiB/s
SHA-256	8 MiB took 1.000 seconds	8.032 MiB/s
HMAC-SHA	7 MiB took 1.000 seconds	7.056 MiB/s
HMAC-SHA256	7 MiB took 1.002 seconds	7.237 MiB/s
RSA 2048 public	30 ops took 1.022 sec	avg 34.067 ms	29.354 ops/sec
RSA 2048 private	2 ops took 2.398 sec	avg 1199.000 ms	0.834 ops/sec
ECC [SECP256R1] 256 key gen	172 ops took 1.004 sec	avg 5.837 ms	171.315 ops/sec
ECDHE [SECP256R1] 256 agree	186 ops took 1.005 sec	avg 5.403 ms	185.075 ops/sec
ECDSA [SECP256R1] 256 sign	174 ops took 1.007 sec	avg 5.787 ms	172.790 ops/sec
ECDSA [SECP256R1] 256 verify	160 ops took 1.003 sec	avg 6.269 ms	159.521 ops/sec

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

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