RECENT BLOG NEWS

The sensor network sub-specification of MQTT does not designate a method for securing the communication between the clients and the gateway. We here at wolfSSL think that is unacceptable! Using the DTLS library of wolfSSL, we would like to protect the sensor data all the way from the client to the gateway, and then from the gateway on to the broker using standard TLS (also from wolfSSL).

Who else is interested in a completely secure, all-in-one solution for MQTT-SN?

If you have any questions or run into any issues, contact us at facts@wolfssl.com, or call us at +1 425 245 8247.

You can download the latest release here: https://www.wolfssl.com/download/
Or clone directly from our GitHub repository: https://github.com/wolfSSL/wolfMQTT
While you’re there, show us some love and give the wolfMQTT project a Star!

Stay tuned for an MQTT embeddable broker coming soon. We are going to be expanding our wolfMQTT library to include a lightweight, embeddable broker. The wolfMQTT embedded broker will allow for a low cost, low power, MQTT enabled network, all implemented in a C-based library.

wolfMQTT secures MQTT communication using the wolfSSL embedded SSL/TLS library for SSL/TLS support. wolfSSL provides support for many different features such as TLS 1.3, TCP, UDP, DTLS etc.

wolfMQTT is available from github (https://github.com/wolfSSL/wolfMQTT) and is distributed under the terms of the GNU General Public License (GPL). Alternative proprietary licenses, technical support (up to 24/7 worldwide) and customization services are available via wolfSSL Inc.

If you have any questions or run into any issues, contact us at facts@wolfssl.com, or call us at +1 425 245 8247.

wolfSSL is adding 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.
• ECC to sign, verify and share secrets.
• HMAC  for keyed-hashing for message authentication.

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 enhanced, secure communications that can be readily certified to DO-178. In addition, any of the 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 has been FIPS 140-2 validated (Certificate’s #2425 and #3389).

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

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. 

Release Plan

• Basic crypto for secure boot and secure firmware updates – Available Now!
• wolfBoot Secure Boot – Q1, 2022
• wolfSSL – Q2, 2022
• wolfDTLS – Q2, 2022

To download and view the most recent version of wolfSSL, the wolfSSL GitHub repository can be cloned from here: https://github.com/wolfssl/wolfssl.git, and the most recent stable release can be downloaded from the wolfSSL download page here: https://www.wolfssl.com/download/.

For more information, please visit the wolfSSL DO-178 product page: https://www.wolfssl.com/wolfssl-support-178-dal/.

If you have any questions or run into any issues, contact us at facts@wolfssl.com, or call us at +1 425 245 8247.

As many in the FIPS world are aware NIST retired CAVP (Cryptographic Algorithm Validation Protocol) testing on June 30th of 2020, permanently replacing CAVP with ACVP (Automated Cryptographic Validation Protocol), also referred to as ACVTS (Automated Cryptographic Validation Test System).

In order to prepare for this transition NIST offered a “demo server” that Vendors like wolfSSL and FIPS Labs could utilize in standup of the new protocol. Once the transition was completed NIST also setup “production servers” which only FIPS Labs with a trusted certificate issued by NIST can connect to; Production Vectors passing are now the gateway to Algorithm Certification (IE certs like the ones wolfSSL just received!).

Algorithm Certification is a prerequisite to CMVP FIPS 140-2 (and 140-3) validations. This design keeps in place the need for a FIPS lab to achieve algorithm certification but it now allows for Vendors such as wolfSSL to pre-test in advance of requesting production vectors for certification! wolfCrypt has been listed on the CMVP IUT List for FIPS 140-3! We are currently working with our testing lab to get validated as quickly as possible with the new FIPS standard from the NIST. wolfSSL is the first software library on the FIPS 140-3 IUT list for embedded development.

Concurrently wolfSSL is also in the process of developing our own ACVP client based off of the current draft (draft-fussell-acvp-spec-01). Having many algorithms already completing the validation process through the NIST operated ACVP Demo server. Where our test vendor information can be seen publicly listed on the demo site here (https://demo.acvts.nist.gov/home).

More on ACVP’s

ACVP stands for (Automated Cryptographic Validation Protocol) and it is the upcoming protocol that will be used for FIPS validation. This is going to be a prerequisite certificate for the CMVP(Cryptographic Module Validation Program) and CAVP(Cryptographic Algorithm Validation Program) certificates.

ACVP makes testing cryptographic algorithms and modules more efficient than the current method and more automated. There are three main parts to ACVP – a server, a proxy, and a client.

• The server side handles requests for test vectors and requests for validation among other requests. This side is operated by a FIPS lab or by NIST themselves.
• A proxy with ACVP can be used to communicate to offline systems and handle transferring information from the system being tested to the server. Often an ACVP client is used instead.
• The last part being a client, which is most relevant to users who are wanting to get their cryptography FIPS validated. An ACVP client is directly hooked up to the module to be tested and then communicates with the ACVP server to send requests for test vectors, responses of the results from running those tests, and requests for algorithm validation. There are multiple pieces required to build a ACVP client in order to complete a validation process, some of the large portions of the effort go into
  • JSON parsing / creation for communication with a ACVP server
  • HTTPS GET / POST / PUT / DELETE messages used for securely transporting information
  • 2 factor authentication with TOTP (Time-Based One-Time Password Algorithm)
  • Plugging in the test harness that runs crypto operations

Ultimately an ACVP client communicates with the server to validate cryptographic operations. This includes creating, or referencing meta data such as; vendor, OE, and module information. A simplified message flow for getting an algorithm validated is as follows:

We can assist with your FIPS needs.

If you have any questions or run into any issues, contact us at facts@wolfssl.com, or call us at +1 425 245 8247.

More information from NIST’s website about the ACVP project can be found here:
https://csrc.nist.gov/Projects/Automated-Cryptographic-Validation-Testing.

From the early days of the wolfSSL library, we have provided example clients and servers with wolfSSL. These examples have shown how easy it is to use wolfSSL in various configurations. We also use them to help test the library. Over the years we’ve added new features available with TLS to our examples, and our examples have grown a little complicated.

Enter the wolfSSL Examples GitHub repository. We tasked some of our interns, with little to no experience with the wolfSSL library, to write some example clients and servers that set up and test various types of connections. They give you a bare-bones simple demonstration on how to set up a client or server using wolfSSL. We also have examples showing off how to use some features of the library like the certificate manager. 

The repository contains example applications, written in C, which demonstrate how to use the wolfSSL lightweight SSL/TLS library for secure communication. Each directory represents a unique topic (SSL/TLS, DTLS, PSK, etc.) and contains a Makefile as well as a simple tutorial on the given topic.

Current Examples:

• utasker (uTasker wolfSSL Example Tasks)

This directory contains example uTasker client and server tasks that demonstrate using wolfSSL with the uTasker stack. These have been tested on the uTasker Simulator.

Please see the utasker/README.md for further usage and details.

• android (Android NDK Examples)

This directory contains examples that demonstrate using wolfSSL and wolfSSLJNI on the Android platform, using the Android NDK toolchain.

Please see the android/README.md for further usage and details.

• certfields (X509 field extraction)

This directory contains an example that demonstrates using the wolfSSL to read a DER encoded certificate and extract the public key and subject name information.

Please see the certfields/README.md for further usage and details.

• certmanager (wolfSSL CertManager)

This directory contains examples that demonstrate using the wolfSSL CertManager (Certificate Manager) functionality.

Please see the certmanager/README.md for further usage and details.

• wolfCLU (wolfSSL Command Line Utility)

This is a tool to provide command line access to wolfcrypt cryptographic libraries. wolfSSL command line utility will allow users to encrypt or decrypt a user specified file to any file name and extension.

Please see the clu/README.md for further usage and details.

Unique feature to wolfSSL CLU

The decision to allow for unique file extensions was prompted by automated tools available for brute forcing files. It will not provide extra security cryptographically however it will force attackers to check the header information on every single brute force attempt. This will provide further frustration and an extra step in any attempt to brute force a file encrypted with our utility.

• DTLS (Datagram TLS)

This directory contains examples of using DTLS, with client and server examples demonstrating UDP, DTLS, non-blocking, session resumption, and multi-threading.

When compiling wolfSSL for use with these examples, wolfSSL will need to be compiled with DTLS support:

cd wolfssl-[version]
./configure --enable-dtls

Examples in this directory may be compiled using:

cd ./dtls
make

• PSK (Pre-Shared Keys)

This directory contains examples of using PSK, with client and server examples demonstrating TCP/IP, PSK, non-blocking, session resumption, and multi-threading.

When compiling wolfSSL for use with these examples, wolfSSL will need to be compiled with PSK support:

cd wolfssl-[version]
./configure --enable-psk

Examples in this directory may be compiled using:

cd ./psk
make

• SSL/TLS

This directory contains examples of using SSL/TLS, with client and server examples demonstrating TCP/IP, SSL/TLS, non-blocking, session resumption, and multi-threading.

Examples in this directory may be compiled using:

cd ./tls
make

• BTLE

This directory contains examples for securing a Bluetooth Low Energy Link (BTLE). BTLE packets are small and throughput is low, so these examples demonstrate a way to exchange data securely without BTLE pairing.

Notes

When necessary, examples will use the example certificates and keys located in the ./certs directory. These certificates and keys have been pulled in from the main wolfSSL repository.

Support

If you have any questions or run into any issues, contact us at facts@wolfssl.com, or call us at +1 425 245 8247.

We see a continuing adoption of wolfTPM and TPM 2.0 modules in IoT and Edge embedded systems. In addition, there is a new trend of adding wolfTPM to safety-critical systems, such as aerospace and medical products. For many years, there was no TPM 2.0 stack designed for baremetal and RTOS systems and wolfTPM changed this.

Today, we can announce that wolfTPM is also the first TPM 2.0 stack to support Physical Presence (PP). This feature allows the user to confirm TPM 2.0 operations by asserting physical input to the TPM chip and increase the level of security assurance for critical operations.

For example, TPM2_Clear is a command that returns the TPM to a factory state, destroying existing primary and storage keys, and can be safeguarded by a PP request. TPM2_Clear is typically used when onboarding a new owner of a system, e.g. second market or internal change of ownership equipment.

PP requests are satisfied by controlling a dedicated I/O pin on the TPM chip and now wolfTPM has the capability to extend the list of commands that require it. This could be used to restrict certain operations. It could also be used in existing designs to replace a mechanical switch previously used for Physical Presence.

Another new feature of wolfTPM is the ability to control extra I/O pins available on TPM modules, such as the STMicroelectronics ST33 TPM 2.0 module. The developer can use a single wolfTPM call to control additional I/O pins and pass physical signals, as sign of security or system events, to other subsystems.

If you have any questions or run into any issues, contact us at facts@wolfssl.com, or call us at +1 425 245 8247.

Some of our users have been wondering if we were doing benchmarks of our SSL/TLS and cryptography performance. Here are the results we have gathered so far: wolfSSL / wolfCrypt Benchmarking.  This page includes several reference benchmarks as well as comparisons of software versus hardware cryptography.

If you have any questions or run into any issues, contact us at facts@wolfssl.com, or call us at +1 425 245 8247.

wolfSSL supports the Online Certificate Status Protocol (OCSP) [https://tools.ietf.org/html/rfc2560] as a client and OCSP stapling version 1 [https://tools.ietf.org/html/rfc6066#section-8] and 2 [https://tools.ietf.org/html/rfc6961]. OCSP is a substitute for Certificate Revocation Lists (CRL). CRLs are a list of certificates that shouldn’t be temporarily or permanently trusted. A major setback for CRLs is the time it takes for these lists to propagate. It may take up to a week [https://tools.ietf.org/html/rfc5280#section-3.3] due to CRLs being issued periodically by Certificate Authorities (CA). OCSP allows clients to verify the validity of server certificates with an OCSP responder and know in real time whether to trust a certificate or not.

OCSP stapling is a TLS extension sent by a client that instructs the server that it would like to receive certificate status information. Stapling significantly cuts down on bandwidth and on round trips needed to set up a connection. When a TLS server receives the Certificate Status Request extension from a client, it will transmit the OCSP responders complete, DER-encoded OCSP response. This relieves the client from having to ask an OCSP responder about the certificate validity and saves the OCSP responder bandwidth coming from clients of a frequently visited server.

OCSP stapling version 1 is severely limited by being able to only transmit the status information of only one certificate. Many TLS servers opt to send intermediate certificates along with its own certificate in case clients do not know the intermediate certificate chain. OCSP stapling version 1 will only save the client the trouble of confirming the status of the server’s certificate, but not of checking the intermediate certificates. OCSP stapling version 2 defines a new extension that allows “servers […] to provide status information about not only the server’s own certificate but also the status of intermediate certificates in the chain” [https://tools.ietf.org/html/rfc6961].

To compile wolfSSL with OCSP support, use the following configure options:
OCSP: --enable-ocsp
OCSP stapling: --enable-ocspstapling
OCSP stapling v2: --enable-ocspstapling2

The following API are available in wolfSSL to enable OCSP usage:

int wolfSSL_CTX_EnableOCSP(WOLFSSL_CTX*, int options);
 int wolfSSL_CTX_DisableOCSP(WOLFSSL_CTX*);
 int wolfSSL_CTX_SetOCSP_OverrideURL(WOLFSSL_CTX*, const char*);
 int wolfSSL_CTX_SetOCSP_Cb(WOLFSSL_CTX*,
 CbOCSPIO, CbOCSPRespFree, void*);
 int wolfSSL_CTX_EnableOCSPStapling(WOLFSSL_CTX*);
 int wolfSSL_CTX_DisableOCSPStapling(WOLFSSL_CTX*);
 int wolfSSL_CTX_EnableOCSPMustStaple(WOLFSSL_CTX*);
 int wolfSSL_CTX_DisableOCSPMustStaple(WOLFSSL_CTX*);

The following flow is enough to use OCSP in wolfSSL:

wolfSSL_CTX_EnableOCSP(ctx, 0);

To use OCSP stapling:

wolfSSL_CTX_EnableOCSPStapling(ctx);
 wolfSSL_UseOCSPStapling(ssl, WOLFSSL_CSR_OCSP, 0);
 wolfSSL_CTX_EnableOCSP(ctx, 0);

To use OCSP stapling version 2:

wolfSSL_CTX_EnableOCSPStapling(ctx);
 wolfSSL_UseOCSPStaplingV2(ssl, WOLFSSL_CSR2_OCSP*, 0);
 wolfSSL_CTX_EnableOCSP(ctx, 0);

* To provide status request information for intermediate certificates use WOLFSSL_CSR2_OCSP_MULTI

To allow the server to provide OCSP stapling responses use:

wolfSSL_CTX_EnableOCSP(ctx, 0);

To provide a custom OCSP responder URL use:

wolfSSL_CTX_SetOCSP_OverrideURL(ctx, ocspUrl);
 wolfSSL_CTX_EnableOCSP(ctx, WOLFSSL_OCSP_URL_OVERRIDE);

OCSP stapling version 2 can’t be used with TLS 1.3 as it has been deprecated [https://tools.ietf.org/html/rfc8446#section-4.4.2.1]. TLS 1.3 uses OCSP stapling version 1 but the certificate status is not a separate message. Instead it is included as an extension to the corresponding certificate.

If you have any questions or run into any issues, contact us at facts@wolfssl.com, or call us at +1 425 245 8247.

Support for wolfSSL has been upstreamed to the master OpenVPN branch in f6dca235ae560597a0763f0c98fcc9130b80ccf4! This means that you will be able to use wolfSSL directly in OpenVPN. wolfSSL is a lightweight and embedded SSL/TLS library that is extensively tested to provide the best security available. Using OpenVPN with wolfSSL, you can take advantage of our hardware cryptography and acceleration on many platforms.

To use OpenVPN with wolfSSL:

Compile wolfSSL with:

./configure --enable-openvpn
make
make install

Compile OpenVPN with:

./configure --with-crypto-library=wolfssl
make
make check
make install

If you have any questions or run into any issues, contact us at facts@wolfssl.com, or call us at +1 425 245 8247.

FIPS 140-2 requires the use of validated cryptography in the security systems implemented by federal agencies to protect sensitive information. The wolfCrypt Module is a comprehensive suite of FIPS Approved algorithms. All key sizes and modes have been implemented to allow flexibility and efficiency.

The National Institute of Standards and Technology (NIST) is sending FIPS cert #2425 into sunset June 2021. For customers who will be impacted, the wolfCrypt Cryptographic Module maintains its #3389 certificate and can be used in conjunction with the wolfSSL embedded SSL/TLS library for full TLS 1.3 client and server support. Upgrade your FIPS cert with wolfSSL to stay afloat and benefit from: 

• Algorithm support for TLS 1.3!
• New algorithms such as AES (CBC, GCM, CTR, ECB), CVL, Hash DRBG, DSA, DHE, ECDSA (key generation, sign, verify), HMAC, RSA (key generation, sign, verify), SHA-3, SHA-2, SHA-1, and Triple-DES
• Hardware encryption support for NXP’s Cryptographic Assistance and Assurance Module (CAAM), NXP Memory-Mapped Cryptographic Acceleration Unit (mmCAU), Intel’s AES-NI, and more
• Support for secure elements and TPM’s
• Interoperability with wolfBoot, wolfSSH, and wolfTPM
• Integration support for third party libraries such as strongswan, nginx, python and more

Contact us to upgrade to FIPS cert #3389 at fips@wolfssl.com. 

Additional Resources 

Learn more about wolfSSL support for FIPS cert #3389: https://www.wolfssl.com/wolfcrypt-fips-certificate-3389-3/ 

For a list of supported Operating Environments for wolfCrypt FIPS, check our FIPS page: https://www.wolfssl.com/license/fips/ 

Our FIPS Story

wolfSSL is currently the leader in embedded FIPS certificates. We have a long history in FIPS starting with wolfCrypt FIPS 140-2 Level 1 Certificate #2425 as well as wolfCrypt v4 FIPS 140-2 Level 1 Certificate #3389. wolfSSL partners with FIPS experts KeyPair to bring you FIPS consulting services, and high assurance along each step of your FIPS certification process. Additionally, wolfSSL will be the first implementation of FIPS 140-3.

wolfSSL also provides support for a wolfCrypt FIPS Ready version of the library! wolfCrypt FIPS Ready is our FIPS enabled cryptography layer code included in the wolfSSL source tree that you can enable and build. You do not get a FIPS certificate, you are not FIPS approved, but you will be FIPS Ready. FIPS Ready means that you have included the FIPS code into your build and that you are operating according to the FIPS enforced best practices of default entry point, and power on self test.

wolfCrypt FIPS Ready can be downloaded from the wolfSSL download page located here: https://www.wolfssl.com/download/. More information on getting set up with wolfCrypt FIPS Ready can be found in our FIPS Ready User guide here: https://www.wolfssl.com/docs/fips-ready-user-guide/

If you have any questions or run into any issues, contact us at facts@wolfssl.com, or call us at +1 425 245 8247.