Month: May 2019

Do you have the need to transfer information to or from ECUs or similar embedded devices? Then look no further than using curl! In short, curl is a tool to transfer data from or to a server using various protocols. The curl library excels with embedded, RTOS, and also large-scale devices, as does the tinycurl library! Similar to curl, tinycurl is essentially a patch on top of regular curl in order to reduce its code size and memory usage.

Additionally, wolfSSL provides support and maintenance for both the curl and tinycurl libraries. wolfSSL support is provided on many different levels, with support available around the world. More information can be found on the support page here: https://wolfssl.com/products/support-and-maintenance/

Both the most recent versions of the tinycurl and curl libraries can be downloaded from the wolfSSL download page, here: https://www.wolfssl.com/download/.

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

With wolfSSL 4.0.0, the wolfSSL embedded SSL/TLS library comes with many new features and improved functionality. Among these features is the addition of a port to the Zephyr Project - a scalable real-time operating system (RTOS) supporting multiple hardware architectures, optimized for resource constrained devices, and built with safety and security in mind.

wolfSSL's Zephyr port comes with multiple test and example applications, such as the wolfCrypt unit tests, wolfSSL TLS with sockets, and wolfSSL TLS with threads example applications. This Zephyr port allows for its users to easily implement lightweight, high-speed and strong encryption for secure data transfer on their devices. As both Zephyr and wolfSSL are targeted for resource-constrained and embedded devices, this combination only makes sense.

More information about the 4.0.0 release of wolfSSL can be found in our blog post here: https://www.wolfssl.com/wolfssl-4-0-0-now-available/.

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 provides many products, services, and support for almost all things TLS and embedded. One of these products provided by wolfSSL is wolfSSH - an SSHv2 server library!

wolfSSH is wolfSSL's own open-source and dual-licensed implementation of the SSHv2 protocol. It's a server library written in ANSI C and targeted for embedded/RTOS/resource-constrained environments. It's fast, has a small code size, and an extensive feature set.  This feature set includes items such as SCP support, SFTP support, PEM and DER certificate support, and also hardware cryptography for supported devices! This comes from wolfSSH's leverage of the wolfCrypt crypto engine for its cryptographic operations.

wolfSSH can be downloaded from the wolfSSL download page (located here: https://www.wolfssl.com/download/), or from a git-clone of the wolfSSH GitHub repository (located here: https://github.com/wolfssl/wolfssh.git).

Additionally, wolfSSL provides support and maintenance for all of its products, wolfSSH included. More information on wolfSSH support and maintenance can be found on the wolfSSL support page, located here: https://www.wolfssl.com/products/support-and-maintenance/.

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

One of the software libraries that is provided by wolfSSL includes the wolfCrypt crypto engine. wolfCrypt includes support for single-precision math, ECC, extensive list of supported ciphers, key/certificate generation, and also Asymmetric cryptography! Asymmetric cryptography differs from regular (synchronous) cryptography that instead of using a singular shared key, they will use a key-value pair. Popular algorithms where this is found include RSA, DH, and ECC - which are algorithms supported and implemented by wolfSSL!

wolfSSL's implementation of these Asymmetric algorithms can also be tuned based on the user's needs as well. For example, if a user requires the same security offered by these algorithms in combination with high performance fast encryption, wolfSSL has the options (or corresponding macro definitions) --enable-fastmath and --enable-fast-rsa available for use. Additionally, if a user needs to improve protection against attacks targeting implementations of these algorithms, wolfSSL has options to improve the security of its implementations of these Asymmetric algorithms. The options for these improvements are --enable-maxstrength and --enable-harden. These options can also be enabled by adding their corresponding defines within the settings file that is in use by the system, and are listed below:

• --enable-fastmath corresponds with USE_FAST_MATH
• --enable-fast-rsa has many different defines that would be used for many different devices, as hardware encryption and architecture comes in to play. It also requires the user have fast RSA libraries in place. Please contact support@wolfssl.com for assistance with enabling this.
• --enable-maxstrength corresponds with WOLFSSL_MAX_STRENGTH
• --enable-harden corresponds with TFM_TIMING_RESISTANT, ECC_TIMING_RESISTANT, and WC_RSA_BLINDING if using rng.

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

The wolfSSL embedded SSL/TLS library supports features not only pertaining to TLS, but DTLS as well! A prime example of a DTLS feature supported by wolfSSL is DTLS session exporting. This allows for serializing and sending a DTLS session immediately after the handshake has been completed. The ability to export the session after a handshake is established has many practical use cases in IoT and embedded environments.

In establishing and maintaining a DTLS connection the handshake portion is the most resource intensive. With this additional feature it is possible to offload the handshake onto a more powerful system, serialize and export it after the handshake is completed, and then have throughput handled by a more resource constrained device.

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 also supports TLS 1.3! More information can be found here: https://www.wolfssl.com/docs/tls13/

Are you a user of Deos?  If so, you will be happy to know that wolfSSL recently added support for Deos RTOS and added TLS client/server examples to the wolfSSL embedded SSL/TLS library for Deos!

Deos is an embedded RTOS used for safety-critical avionics applications on commercial and military aircraft. Certified to DO-178C DAL A, the time and space partitioned RTOS features deterministic real-time response and employs patented “slack scheduling” to deliver higher CPU utilization. DO-178C DAL A refers to a specification that is required for software to be used in aerospace software systems. 

The Deos port in wolfSSL is activated by using the "WOLFSSL_DEOS" macro. For instructions on how to build and run the examples on your projects, please see the “<wolfssl-root>/IDE/ECLIPSE/DEOS/README” file.  This support is currently located in our GitHub master branch, and will roll into the next stable release of wolfSSL as well.

wolfSSL provides support for the latest and greatest version of the TLS protocol, TLS 1.3! Using the wolfSSL port with your device running Deos will allow your device to connect to the internet in one of the most secure ways possible.

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

Resources
The most recent version of wolfSSL can be downloaded from our download page, here: https://www.wolfssl.com/download/
wolfSSL GitHub repository: https://github.com/wolfssl/wolfssl.git
wolfSSL support for TLS 1.3: https://www.wolfssl.com/docs/tls13/
Deos RTOS homepage: https://www.ddci.com/category/deos/

wolfBoot is wolfSSL's own implementation of a secure bootloader that leverages wolfSSL's underlying wolfCrypt module to provide signature authentication for the running firmware.

The role of a secure bootloader is to effectively prevent the loading of malicious or unauthorized firmware on the target. Additionally, wolfBoot provides a fail-safe update mechanism, that can be interrupted at any time, and resumed at next boot.

wolfBoot is designed to be a portable, OS-agnostic, secure bootloader solution for all 32-bit microcontrollers, relying on wolfCrypt for firmware authentication.

Due to its minimalist design and the tiny Hardware Abstraction Layer (HAL) API, wolfBoot is completely independent of any OS or bare-metal application, and can be easily ported and integrated into existing embedded software solutions.

wolfBoot provides the basis for secure firmware update (OTA) management at boot time, cutting down the development effort needed to implement and validate the required mechanisms to handle the updates. It reduces the development effort to just receiving the image using a secure channel within the application/OS. We recommend using wolfSSL to encrypt the firmware transfer over TLS, to avoid eavesdropping. Once the image is transferred and stored into the update partition, wolfBoot takes care of the update procedure at the next boot.

Remote updates that would lead to a faulty firmware are automatically reverted by wolfBoot after the first 'test' boot, by restoring the original firmware image whenever the update has failed to boot properly. This mechanism protects the target device from accidental updates on the field.

wolfBoot can be downloaded from the wolfSSL download page here: https://www.wolfssl.com/download/

More about boot loaders can be found here: https://en.wikipedia.org/wiki/Booting#BOOT-LOADER
More about wolfSSL: https://www.wolfssl.com/products/wolfssl/
More about wolfCrypt: https://www.wolfssl.com/products/wolfCrypt/

Additionally, wolfSSL will be at ICMC in a couple of weeks! Be sure to stop by booth #103 and say hello!

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

Version 1.4.0 of the wolfSSH SSHv2 server library has been released! Many new and exciting features were added to wolfSSH with this release. Some of the new additions include: support for port forwarding, client side pseudo terminal support, enhancements for non blocking use, AES-CTR cipher support, and support for SFTP on windows.

This release also includes fixes and enhancements to existing features. Some of the fixes include resolving GCC-7 warnings and fixes for example use cases when wolfSSL ECC caching is turned on.

A full list of notable addition and fixes is as follows:

• SFTP support for time attributes
• TCP port forwarding feature added (--enable-fwd)
• Example TCP port forwarding added to /examples/portfwd/portfwd
• Fixes to SCP, including default direction set
• Fix to match ID during KEX init
• Add check for window adjustment packets when sending large transfers
• Fixes and maintenance to Nucleus port for file closing
• Add enable all option (--enable-all)
• Fix for --disable-inline build
• Fixes for GCC-7 warnings when falling through switch statements
• Additional sanity checks added from fuzz testing
• Refactor and fixes for use with non blocking
• Add extended data read for piping stderr
• Add client side pseudo terminal connection with ./examples/client/client -t
• Add some basic Windows terminal conversions with wolfSSH_ConvertConsole
• Add wolfSSH_stream_peek function to peek at incoming SSH data
• Change name of internal function from SendBuffered to wolfSSH_SendPacket to avoid clash with wolfSSL
• Add support for SFTP on Windows
• Use int types for arguments in examples to fix Raspberry Pi build
• Fix for fail case with leading 0’s on MPINT
• Default window size (DEFAULT_WINDOW_SZ) lowered from ~ 1 MB to ~ 16 KB
• Disable examples option added to configure (--disable-examples)
• Callback function and example use added for checking public key sent
• AES CTR cipher support added
• Fix for freeing ECC caches with examples
• Renamed example SFTP to be examples/sftpclient/wolfsftp

The most up-to-date versions of wolfSSH and other wolfSSL products can be found on the wolfSSL download page here: https://www.wolfssl.com/download/.

For more information about wolfSSH or the changes incorporated into the 1.4.0 release, please contact facts@wolfssl.com.