기본적으로 커널에 따라 다르므로 " See / proc / crypto "는 "답변"입니다. cryptsetup 매뉴얼 페이지는 다음과 같이 말합니다.
NOTES ON SUPPORTED CIPHERS, MODES, HASHES AND KEY SIZES
The available combinations of ciphers, modes, hashes and key sizes depend
on kernel support. See /proc/crypto for a list of available options. You
might need to load additional kernel crypto modules in order to get more
options.
For the --hash option, if the crypto backend is libgcrypt, then all algo‐
rithms supported by the gcrypt library are available. For other crypto
backends some algorithms may be missing.
그러나 내 /proc/crypto
뱀이나 xts (aes)는 언급하지 않았으므로 대신 어떤 cryptsetup benchmark
보고서 (및 속도도 표시)를 보는 것이 좋습니다 . 예를 들면 다음과 같습니다.
$ cryptsetup benchmark
# Tests are approximate using memory only (no storage IO).
PBKDF2-sha1 292752 iterations per second
PBKDF2-sha256 221362 iterations per second
PBKDF2-sha512 142010 iterations per second
PBKDF2-ripemd160 277124 iterations per second
PBKDF2-whirlpool 155727 iterations per second
# Algorithm | Key | Encryption | Decryption
aes-cbc 128b 164.7 MiB/s 164.5 MiB/s
serpent-cbc 128b 119.5 MiB/s 205.0 MiB/s
twofish-cbc 128b 163.5 MiB/s 208.6 MiB/s
aes-cbc 256b 148.4 MiB/s 147.9 MiB/s
serpent-cbc 256b 128.1 MiB/s 205.3 MiB/s
twofish-cbc 256b 202.3 MiB/s 213.1 MiB/s
aes-xts 256b 165.4 MiB/s 145.3 MiB/s
serpent-xts 256b 150.0 MiB/s 194.5 MiB/s
twofish-xts 256b 206.4 MiB/s 206.9 MiB/s
aes-xts 512b 149.4 MiB/s 147.5 MiB/s
serpent-xts 512b 181.7 MiB/s 195.0 MiB/s
twofish-xts 512b 207.1 MiB/s 208.6 MiB/s
해시는 처음 몇 줄 (sha1, sha256, sha512, ripemd160, whirlpool)입니다. 암호는 알고리즘 헤더 아래에 있습니다.
기본값이 무엇인지 살펴보면 "꽤 좋은"항목에 대한 좋은 아이디어를 얻을 수 있습니다.
$ cryptsetup --help|tail -n 8
Default compiled-in key and passphrase parameters:
Maximum keyfile size: 8192kB, Maximum interactive passphrase length 512 (characters)
Default PBKDF2 iteration time for LUKS: 1000 (ms)
Default compiled-in device cipher parameters:
loop-AES: aes, Key 256 bits
plain: aes-cbc-essiv:sha256, Key: 256 bits, Password hashing: ripemd160
LUKS1: aes-xts-plain64, Key: 256 bits, LUKS header hashing: sha1, RNG: /dev/urandom
키가 더 큰 (을 사용하여) 사용 --key-size
하면 약간 느리면 더 강해야합니다.
--key-size, -s <bits>
Sets key size in bits. The argument has to be a multiple of 8.
The possible key-sizes are limited by the cipher and mode used.
See /proc/crypto for more information. Note that key-size in
/proc/crypto is stated in bytes.