dsPIC Developer's Support LIbrary.indd - Microchip Technology
Transport Layer Security (TLS). â Secure Multi-purpose Internet Mail Extensions (S/MIME). ⢠ZigBee⢠technology and other monitoring and control applications.
Summary Microchip offers a reliable security solution for embedded applications built on the dsPIC30F platform. This solution is provided by means of two libraries – Symmetric Key and Asymmetric Key Embedded Encryption Libraries. The Symmetric Key Library features: • Hash functions – SHA-1 secure hash standard – MD5 message digest • Symmetric-key encryption/decryption functions – Advanced Encryption Standard (AES) – Triple Data Encryption Algorithm (Triple-DES) • Random number generator functions – Deterministic Random Bit Generator ANSI X9.82
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The Trusted Computing Group (TCG) and related Microsoft Next- generation Secure Computing Base (NGSCB) both specify RSA and Triple-DES. RSA and other asymmetric solutions are featured in the dsPIC30F Asymmetric Key Embedded Encryption Library (SW300055).
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Typical Applications The algorithms supported by this library have emerged as the de facto standard for many large-scale, secured applications like web access, E-mail, secure XML transactions and virtual private networks (VPN). These algorithms are also recommended by most Internet Engineering Task Force (IETF), Federal Information Processing Standards (FIPS) and IPSec standards. Some typical applications for this library include: • Mobile and wireless devices, PDAs • Secure banking • Secure web transactions – Secure Socket Layer (SSL) – Transport Layer Security (TLS) – Secure Multi-purpose Internet Mail Extensions (S/MIME) • ZigBee™ technology and other monitoring and control applications • Smart card readers/trusted card readers • Friend/foe identification
Secure devices and peripherals interoperating with TCG and NGSCB PC’s
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C-callable library functions developed in MPLAB®ASM30 Assembly language Optimized for speed, code size and RAM usage: – RAM usage below 60 bytes Library functions extensively tested for adherence to applicable standards Symmetric key encryption/decryption functions support multiple modes of operation: – Electronic Code Book (ECB) mode – Cipher Block Chaining with Message Authentication (CBC-MAC) mode – Counter (CTR) mode – Combined CBC-MAC and Counter (CCM) mode A comprehensive dsPIC30F Embedded Encryption Libraries User’s Guide describes the required APIs for library functions Several examples of use are provided for each library function
Getting Started • Review the dsPIC30F Symmetric Key Embedded Encryption Library web page at www.microchip.com • Download the dsPIC30F Embedded Encryption Libraries User’s Guide from the Microchip web site • Purchase part number SW300050 • If Asymmetric Key Embedded Encryption Library support is required (part number SW300055), visit www.microchip.com and review the applicable information
Notes: 1. Wrapper functions are used in combination with the underlying basic encryption and/or decryption functions for the respective algorithm (AES,T-DES) 2. All library functions use the stack and require input and output message buffers to be set up by the calling application; stack usage is below 60 bytes of RAM 3. AES and T-DES data rate represents the average of the data rates for performing basic encryption and decryption functions for a single block of data 4. All data rate statistics shown here assume device peration of 30 MIPS
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