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In addition, wolfSSL now has a support-specific blog page dedicated to answering some of the more commonly received support questions.

Case Study: wolfSSL enables Saficard to Secure E-Care Bills

Saficard is a French company specializing in solutions for healthcare payment management. One of their products is a Point-of-Sale (POS) terminal designed to accept the Vitale Card. The Vitale Card is a French health insurance card that stores social security information and allows patients to be reimbursed for healthcare costs. The card works with various smart card standards, such as: EMV, IAS-ECC, and ISO (joinup).

The French government has created strict security standards for processing healthcare bills using the Vitale Card. Among these standards are using Cryptography Message Syntax (PKCS#7) and TLS for transmitting healthcare transactions.

Saficard faced problems finding a lightweight-portable cryptography library written in C for their Point-of-Sale terminals. Their solution was using wolfSSL + wolfCrypt to implement PKCS#7 and TLS on the iWL250 terminal by Ingenico.

Read more about the Saficard Case Study and check out Saficard.
Vitale Card Information at joinup

If you have any questions about using wolfSSL products for your project, please contact us at

Improved NXP MMCAU Crypto hardware performance

The NXP Memory-Mapped Cryptographic Acceleration Unit (mmCAU) is on many Kinetis and ColdFire microcontrollers. It improves symmetric AES and SHA performance as compared to our software based implementation. The v4.2.0 enhanced the MMCAU support to use multiple blocks against hardware and optimizes to avoid memory copies (memcpy) when able. This resulted in a 20-78% improvement.


  • Enhancement for NXP MMCAU to process more than one block at a time.
  • Added optional buffer alignment detection macro WC_HASH_DATA_ALIGNMENT to avoid memcpy.
  • Added MD5 and SHA-1 support for XTRANSFORM_LEN to process blocks.
  • Cleanups for consistency between algorithms and code commenting.

Improved MMCAU performance: SHA-1 by 35%, SHA-256 by 20% and MD5 by 78%.

NXP K64 MMCAU with wolfSSL v4.2.0:

MD5                  8 MB took 1.000 seconds,    7.910 MB/s

SHA                  4 MB took 1.005 seconds,    3.644 MB/s

SHA-256              2 MB took 1.006 seconds,    2.306 MB/s
NXP K64 MMCAU with wolfSSL v4.1.0:

MD5                  4 MB took 1.004 seconds,    4.450 MB/s

SHA                  3 MB took 1.006 seconds,    2.670 MB/s

SHA-256              2 MB took 1.008 seconds,    1.913 MB/s

Changes are in GitHub pull request #2481 and in the wolfSSL v4.2.0 release.

For more information please email us at


Differences between TLS 1.2 and TLS 1.3 (#TLS13)

wolfSSL's embedded SSL/TLS library has included support for TLS 1.3 since early releases of the TLS 1.3 draft. Since then, wolfSSL has remained up-to-date with the TLS 1.3 specification. In this post, the major upgrades of TLS 1.3 from TLS 1.2 are outlined below:

TLS 1.3

This protocol is defined in RFC 8446. TLS 1.3 contains improved security and speed. The major differences include:

  • The list of supported symmetric algorithms has been pruned of all legacy algorithms. The remaining algorithms all use Authenticated Encryption with Associated Data (AEAD) algorithms.
  • A zero-RTT (0-RTT) mode was added, saving a round-trip at connection setup for some application data at the cost of certain security properties.
  • Static RSA and Diffie-Hellman cipher suites have been removed; all public-key based key exchange mechanisms now provide forward secrecy.
  • All handshake messages after the ServerHello are now encrypted.
  • Key derivation functions have been re-designed, with the HMAC-based Extract-and-Expand Key Derivation Function (HKDF) being used as a primitive.
  • The handshake state machine has been restructured to be more consistent and remove superfluous messages.
  • ECC is now in the base spec  and includes new signature algorithms. Point format negotiation has been removed in favor of single point format for each curve.
  • Compression, custom DHE groups, and DSA have been removed, RSA padding now uses PSS.
  • TLS 1.2 version negotiation verification mechanism was deprecated in favor of a version list in an extension.
  • Session resumption with and without server-side state and the PSK-based ciphersuites of earlier versions of TLS have been replaced by a single new PSK exchange.

More information about wolfSSL and the TLS 1.3 protocol can be found here:

Additionally, please contact for any questions.

wolfSSL Support for DO-178 DAL A

wolfSSL now provides support for complete RTCA DO-178C level A certification! wolfSSL will offer DO-178 wolfCrypt as a commercial off -the-shelf (COTS) solution for connected avionics applications. Adherence to DO-178C level A will be supported through the first wolfCrypt COTS DO-178C certification kit release that includes traceable artifacts for the following encryption algorithms:

  • SHA-256 for message digest
  • AES for encryption and decryption
  • RSA to sign and verify a message.
  • Chacha20_poly1305 for authenticated encryption and decryption.

The primary goal of this initial release is to provide the proper cryptographic underpinnings for secure boot and secure firmware update in commercial and military avionics. wolfSSL brings trusted, military-grade security to connected commercial and military aircraft. Avionics developers now have a flexible, compact, economical, high-performance COTS solution for quickly delivering FIPS 140-2 validated crypto algorithms can be used in DO-178 mode for combined FIPS 140-2/DO-178 consumption. The wolfCrypt cryptography library FIPS 140-2 validation certificates can be applied to DO-178 uses. 

Optimization Support

We understand that securely rebooting avionic systems has rigorous performance requirements. As such, we’re here to help with cryptographic performance optimizations through our services organization. 

To download and view the most recent version of wolfSSL, the wolfSSL GitHub repository can be cloned from here:, and the most recent stable release can be downloaded from the wolfSSL download page here:

wolfSSL DO-178 product page:

For more information, please contact



wolfSSL + Nginx


The wolfSSL embedded SSL/TLS library provides support for various open source projects, including Nginx. For those who are unfamiliar, Nginx is a high-performance, high-concurrency web server. Like wolfSSL, it is also compact, fast, and highly scalable. Additionally, wolfSSL also provides support for TLS 1.3 and features such as OCSP, so Nginx servers can be configured with the latest and most secure protocols.

Nginx and wolfSSL make a likely pairing because they are both lean, compact, fast, and scale well under high volumes of connections. wolfSSL + Nginx is available in a public GitHub repository.  The configure option --enable-nginx will compile the wolfSSL libraries with Nginx support.

For more information on wolfSSL + Nginx, TLS 1.3, OCSP, or for any additional questions, contact

wolfCrypt as an engine for OpenSSL

As many people know, the OpenSSL project is struggling with FIPS, and their new FIPS release is not expected until December 2020. The version of OpenSSL that supports FIPS goes into End Of Life and is no longer supported in December of 2019.

This means that OpenSSL users will not have a supported package for over a year. This is a big issue for companies that rely on security.

To fill this breach, wolfSSL has integrated our FIPS certified crypto module with OpenSSL as an OpenSSL engine. This means that:

1. OpenSSL users can get a supported FIPS solution, with packages available up to the 24×7 level,

2. The new wolfCrypt FIPS solution also supports the TLS 1.3 algorithms, so your package can support TLS 1.3,

3. You can support hardware encryption with your package, as the new wolfCrypt solution has full hardware encryption support.

Additionally, should you be using one of the OpenSSL derivatives like BoringSSL, we can also support you.

Contact us at if you would like to learn more!

We love you.

Team wolfSSL

Commercial curl Support

wolfSSL’s embedded SSL/TLS library comes with support for many tools and libraries, one of which is curl! In addition to providing support and maintenance for curl, wolfSSL has also integrated the curl library in conjunction with Daniel Stenberg (an original author of curl and one of the founders). With this integration, wolfSSL now provides commercial support and consulting for the curl library!

Commercial support for wolfSSL products are available directly from wolfSSL on a yearly basis. wolfSSL provides four levels of paid support, which also includes an option for 24×7 support. For comparison of each support level, visit the wolfSSL Support and Maintenance page.

wolfSSL also provides support for the latest version of the TLS protocol, TLS 1.3! Read more about wolfSSL’s implementation and the protocol itself here:

For more information regarding wolfSSL, curl, support packages, or any additional questions, please contact


wolfSSL Support for Qt (#Qt5)

Calling all developers of Qt! wolfSSL is continuously adding new features and support for various open source projects. One of the most recent projects wolfSSL has been working on is support for Qt. We are excited to announce wolfSSL support with Qt version 5.12.

The recent wolfSSL integration with Qt provides a lightweight and performance-minded alternative for the Qt Network backend SSL/TLS. The QSslSocket class makes it easy to add encryption to your application. Now, wolfSSL makes it secure!

For more information about using wolfSSL with Qt to build your next application, or for any additional questions, contact us at

To view more open source projects wolfSSL has teamed up with, visit
To learn more about the advantages of using wolfSSL, visit our page on “wolfSSL vs. OpenSSL”.

wolfMQTT with support for MQTT v5.0

wolfSSL provides many different products for many different implementations of internet protocols, one of which is wolfMQTT. The wolfMQTT library is a client implementation of MQTT written in C for embedded use, with support for SSL/TLS via the wolfSSL library, and also provides support for MQTT-Sensor Network (MQTT-SN). While wolfMQTT is based on the MQTT 3.1.1 specification, wolfMQTT also provides support for the MQTT v5.0 specification – which was recently approved and standardized by OASIS. This new standard comes with some changes, which are outlined below (from the MQTT v5.0 standard):

  • Enhancements for scalability and large scale systems
  • Improved error reporting
  • Formalize common patterns including capability discovery and request response
  • Extensibility mechanisms including user properties
  • Performance improvements and support for small clients

For more information about wolfMQTT or its MQTT v5.0 support, please contact

wolfMQTT GitHub Repository:
wolfMQTT User Manual:
MQTT v5.0 specification:
HiveMQ: “MQTT 5: Upgrade now. Here’s why.”:

wolfSSL with curl and tiny-curl (#cURL)

wolfSSL’s embedded SSL/TLS library comes with support for many tools and libraries, one of which is curl! In addition to providing support and maintenance for curl, wolfSSL has also integrated the curl library in conjunction with Daniel Stenberg (an original author of curl and one of the founders). With this integration, wolfSSL now provides support and consulting for the curl library.

In addition, a modified version of the curl library, tiny-curl, is also available through wolfSSL. tiny-curl is a patch applied on top of curl to reduce its code size, which makes it favorable for embedded and real-time environments. Version 0.10 of tiny-curl is based on curl version 7.65.3, and is available for download from the wolfSSL download page:

More information about wolfSSL and curl can be found on the curl product page: Details on wolfSSL support for curl and tiny-curl is also located on the support page here:

wolfSSL also provides support for the latest versions of the TLS protocol, including TLS 1.3! As such, wolfSSL is considering adding TLS 1.3 support to cURL in the future. More information about wolfSSL and TLS 1.3 can be found here:

For more information regarding wolfSSL, TLS 1.3, cURL, support packages, or any additional questions, please contact

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