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![Vladis Dronov](/assets/img/avatar_default.png)
Implement a crypto library interface for the s390-native ChaCha20 cipher algorithm. This allows us to stop to select CRYPTO_CHACHA20 and instead select CRYPTO_ARCH_HAVE_LIB_CHACHA. This allows BIG_KEYS=y not to build a whole ChaCha20 crypto infrastructure as a built-in, but build a smaller CRYPTO_LIB_CHACHA instead. Make CRYPTO_CHACHA_S390 config entry to look like similar ones on other architectures. Remove CRYPTO_ALGAPI select as anyway it is selected by CRYPTO_SKCIPHER. Add a new test module and a test script for ChaCha20 cipher and its interfaces. Here are test results on an idle z15 machine: Data | Generic crypto TFM | s390 crypto TFM | s390 lib size | enc dec | enc dec | enc dec -----+--------------------+------------------+---------------- 512b | 1545ns 1295ns | 604ns 446ns | 430ns 407ns 4k | 9536ns 9463ns | 2329ns 2174ns | 2170ns 2154ns 64k | 149.6us 149.3us | 34.4us 34.5us | 33.9us 33.1us 6M | 23.61ms 23.11ms | 4223us 4160us | 3951us 4008us 60M | 143.9ms 143.9ms | 33.5ms 33.2ms | 32.2ms 32.1ms Signed-off-by: Vladis Dronov <vdronov@redhat.com> Reviewed-by: Harald Freudenberger <freude@linux.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
34 lines
1 KiB
Bash
34 lines
1 KiB
Bash
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (C) 2022 Red Hat, Inc.
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# Author: Vladis Dronov <vdronoff@gmail.com>
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#
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# This script runs (via instmod) test-cipher.ko module which invokes
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# generic and s390-native ChaCha20 encryprion algorithms with different
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# size of data. Check 'dmesg' for results.
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#
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# The insmod error is expected:
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# insmod: ERROR: could not insert module test_cipher.ko: Operation not permitted
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lsmod | grep chacha | cut -f1 -d' ' | xargs rmmod
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modprobe chacha_generic
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modprobe chacha_s390
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# run encryption for different data size, including whole block(s) +/- 1
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insmod test_cipher.ko size=63
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insmod test_cipher.ko size=64
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insmod test_cipher.ko size=65
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insmod test_cipher.ko size=127
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insmod test_cipher.ko size=128
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insmod test_cipher.ko size=129
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insmod test_cipher.ko size=511
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insmod test_cipher.ko size=512
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insmod test_cipher.ko size=513
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insmod test_cipher.ko size=4096
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insmod test_cipher.ko size=65611
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insmod test_cipher.ko size=6291456
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insmod test_cipher.ko size=62914560
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# print test logs
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dmesg | tail -170
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