AVR-Crypto-Lib/en: Unterschied zwischen den Versionen

Version vom 16. Juni 2008, 01:59 Uhr

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)

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

Blockciphers

name	variant	language	size (flash) (bytes)	size (context) (bytes)	size (stack) (bytes)	keysize (bits)	blocksize (bits)	time (initalisation)	time (encrypt)	time (decrypt)	attacks	paper	license / patents
Camellia	C	C		32		128	128
Camellia	C+Asm	C+Asm	5803	32		128	128
Cast5	C	C	14108	75		0-128	64	13739	12550	13109
RC5	RC5-32/r/b	C	1524	3+(8*#Runden+1)		1 – 2040	64	79352	7827	7223
RC6	RC6-32/r/b	C	2656	19+(8*#Runden)		1 – 2040	128	139940	26600	25986
Noekeon	C	C		0 (16)		128	128
Noekeon	Asm	Asm	850	0 (16)		128	128	10566	10340	10895
DES	C	C	2480	0		56	64
TDES	C	C	2480	0		168	64	0	852082	852107
Serpent	Non-bitslice	C		528		1 – 256	128
Serpent	bitslice	C	4498	528		1-256	128	102098	70827	70462
Skipjack	C	C	1244	0		80	64
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
XTEA	C	C		0		128	64
XTEA	Asm	Asm	504	0		128	64
Shabea	C	C	2020	0		0 – infinit	256

Streamchiphers

name

variant

language

size (flash) (bytes)

size (context) (bytes)

size (stack) (bytes)

keysize (bits)

output size (bits)

time (initialisation)

time (generation)

attacks

paper

license / patents

ARCFOUR

C

258

0 – 2040

8

ARCFOUR

Asm

122

258

0 – 2040

8

Trivium

C

424

36

80

1

Grain

C

778

20

80

1

Hashes

name

variant

language

size (flash) (bytes)

size (context) (bytes)

size (stack) (bytes)

hashsize (bits)

blocksize (bits)

time (initialsation)

time (per block)

time (finalisation)

attacks

paper

license / patents

SHA-256

C

40

256

512

SHA-256

Asm

1600

40

256

512

SHA-1

C

28

160

512

SHA-1

Asm

1070

28

160

512

MD5

C

2086

20

128

512

MACs

name

variant

language

size (flash) (bytes)

size (context) (bytes)

size (stack) (bytes)

keysize (bits)

blocksize (bits)

time (initialisation)

time (per block)

time (finalisation)

attacks

paper

license / patents

HMAC-SHA256

C

2712

40

any

512

PRNGs

name	variant	language	size (flash) (bytes)	size (context) (bytes)	size (stack) (bytes)	blocksize (bits)	time (input)	time (output)	attacks	paper	license / patents
Entropium		C	2174	64		256

@@ Zeile 11: / Zeile 11: @@
 *small implementation of cryptographic algorithms in C (quite protable)
 *even smaller implementations in assembly language (ATmega, gnu-avr-as)
-*license: GPLv2 & GPLv3 (nearly everything)
+*allfunctions are '''reentrant''' (except functions of the PRNG "Entopium")
+*license: GPLv3 (nearly everything)