Chapter 1 - Introduction to NetX Duo Crypto

NetX Duo Crypto is a high-performance real-time implementation of cryptographic algorithms designed to provide data encryption and authentication services. NetX Duo Crypto is designed to plug in for NetX Duo Secure TLS, DTLS, and IPsec modules. Applications may also use NetX Duo Crypto as a standalone module outside network security.

NetX Duo Crypto Unique Features

NetX Duo Crypto is implemented in the standard C language (C99), compatible with virtually all C/C++ compilers. Its modular design allows an application to only link in the crypto algorithms it needs to use, therefore achieving minimal code size. The implementation is designed to work with most 32-bit microprocessors and uses only the basic math operations (addition, subtraction, multiplication, division, logical AND, OR, NOR, and bit shift operations). All these operations are used with 32-bit quantities, making NetX Duo Crypto portable across most 32-bit microprocessors. The implementation is specifically optimized to run on resource constrained microprocessors, targeting deeply embedded applications.

Algorithms supported by NetX Duo Crypto

NetX Duo Crypto supports the following cryptographic algorithms. NetX Duo Crypto follows all general recommendations and basic requirements within the constraints of a real-time operating system and platforms requiring a small memory footprint and efficient execution.

Algorithm	Key Length (bits)
AES(CBC, CTR)	128, 192, 256
AES(XCBC)	128
AES-CCM 8	128
3DES(CBC)	192
HMAC-SHA1	Any length
HMAC-SHA224	Any length
HMAC-SHA256	Any length
HMAC-SHA384	Any length
HMAC-SHA512	Any length
HMAC-SHA512/224	Any length
HMAC-SHA512/256	Any length
HMAC-MD5	Any length
RSA	1024, 2048, 3072, 4096

Algorithm

Key Length (bits)

AES(CBC, CTR)

128, 192, 256

AES(XCBC)

128

AES-CCM 8

128

3DES(CBC)

192

HMAC-SHA1

Any length

HMAC-SHA224

Any length

HMAC-SHA256

Any length

HMAC-SHA384

Any length

HMAC-SHA512

Any length

HMAC-SHA512/224

Any length

HMAC-SHA512/256

Any length

HMAC-MD5

Any length

RSA

1024, 2048, 3072, 4096

Algorithm	Digest Length (bits)	Block Size (bits)
SHA1	160	512
SHA224	224	512
SHA256	256	512
SHA384	384	1024
SHA512	512	1024
MD5	128	512
HMAC-SHA1	160	512
HMAC-SHA224	224	512
HMAC-SHA256	256	512
HMAC-SHA384	384	1024
HMAC-SHA512	512	1024
HMAC-SHA512/224	224	1024
HMAC-SHA512/256	256	1024
HMAC-MD5	128	512
Elliptic Curve	P192/224/256/384/521

NetX Duo Crypto Requirements

TBD: Memory Requirement.. Interrupt/re-entrant safe? Needs discussion

NetX Duo Crypto Constraints

None.