AVR-Crypto-Lib/en

Where can I find it?

SVN: [1]

via Track (also svn, but suitable for direct browsing):[2]

Short Facts

• small implementation of cryptographic algorithms in C (quite protable)
• even smaller implementations in assembly language (ATmega, gnu-avr-as)
• allfunctions are reentrant (except functions of the PRNG "Entopium")
• license: GPLv3 (nearly everything) (for different licensing contact author)

About

Crypto-avr-lib is a set of implementations of different cryptographic primitives. Due to the special limitations of microcontrollers (very raw space, RAM and flash are ranging from a few bytes to a few KiB) reference or "normal" optimised implementations are not useable. Therefor we try to provide special implementations which respect the extrem limited resources of microcontroller applications.

What should be done

symmetric

block	aes	cast6	twofish	idea	kasumi
stream	seal	A5/1	Turing	Rabbit
hashes	ripemd	whirlpool

What we have

symmetric

block

• XTEA
• CAST5
• Camellia
• Skipjack
• Noekeon
• RC5
• RC6
• SEED
• DES
• TDES (aka EDE-DES, 3DES)
• SHABEA
• Serpent
• Present

stream

• ARCFOUR (RC4 kompatibel)
• Trivium
• Grain

hashes

• SHA-256
• SHA-1
• MD5

others

• HMAC-SHA256 (following RFC 2104)
• PRNG

Facts

Blockchiphers

Name	Variants	Language	Size (flash) (Bytes)	Size (context) (Bytes)	Size (stack) (Bytes)	Keylength (Bits)	Blocksize (Bits)	Time (initialisation)	Time (encryption)	Time (decryption)	Attacs	Paper	Licenses / Patents
Camellia	C	C		32		128	128
Camellia	C+Asm	C+Asm	5803	32		128	128
Cast5	C	C	14128	75		0 – 128	64	13742	12550	13109
RC5	RC5-32/r/b	C	1524	3+(8*#rounds+1)		1 – 2040	64	79352	7827	7223
RC6	RC6-32/r/b	C	2656	19+(8*#rounds)		1 – 2040	128	139940	26600	25986
Noekeon	C	C	1438	0 (16)		128	128	26037	25798	26396
Noekeon	Asm	Asm	774	0 (16)		128	128	10416	10191	10745
DES	C	C	2480	0		56	64	–	284952	284977
TDES	C	C	2480	0		168	64	–	852082	852107
Serpent	Non-bitslice	C	2862	528		1 – 256	128	537021	492884	493004
Serpent	bitslice	C	4498	528		1 – 256	128	102098	70827	70462
Skipjack	C	C	1244	0		80	64	–	38109	38450
Present	C	C	1514	256		80	64	30395	105796	151624
SEED	C	C		16		128	128
SEED	C+Asm	C+Asm	4052	16		128	128	129	50086	49808
XTEA	C	C	754	0		128	64	–	9912	9789
XTEA	Asm	Asm	504	0		128	64	–	7687	7688
Shabea	C	C	2020	0		0 – infinit	256
Name	Variants	Language	Size (flash) (Bytes)	Size (context) (Bytes)	Size (stack) (Bytes)	Keylength (Bits)	Blocksize (Bits)	Time (initialisation)	Time (encryption)	Time (decryption)	Attacs	Paper	Licenses / Patents

Streamciphers

Name	Variants	Language	Size (flash) (Bytes)	Size (context) (Bytes)	Size (stack) (Bytes)	Keylength (Bits)	Outputsize (Bits)	Time (initialisation)	Time (generation)	Attacs	Paper	Licenses / Patents
ARCFOUR	C	C	230	258		8 – 2040	8	64086	56
ARCFOUR	Asm	Asm	122	258		8 – 2040	8	6965	42
Trivium	C	C	424	36		80	1	775726	665
Grain	C	C	778	20		80	1	107366	617

Hashes

Name	Variants	Language	Size (flash) (Bytes)	Size (context) (Bytes)	Size (stack) (Bytes)	Hashsize (Bits)	Blocksize (Bits)	Time (initialisation)	Time (per block)	Time (finalisation)	Attacs	Paper	Licenses / Patents
SHA-256	C	C	3428	40		256	512	257	179184	183576
SHA-256	Asm	Asm	1600	40		256	512	314	53386	53791
SHA-1	C	C	2774	28		160	512	91	81344	85736
SHA-1	Asm	Asm	1070	28		160	512	218	40330	40735
MD5	C	C	2086	20		128	512	71	41786	42358

MACs

Name	Variants	Language	Size (flash) (Bytes)	Size (context) (Bytes)	Size (stack) (Bytes)	Keylength (Bits)	Blocksize (Bits)	Time (initialisation)	Time (per block)	Time (finalisation)	Attacs	Paper	Licenses / Patents
HMAC-SHA256		C	2712	40		any	512
HMAC-SHA1		C	2182	28		any	512

PRNGs

Name	Variants	Language	Size (flash) (Bytes)	Size (context) (Bytes)	Size (stack) (Bytes)	Blocksize (Bits)	Time (input processing)	Time (output generation)	Attacs	Paper	Licenses / Patents
Entropium		C	2174	64		256