Testing the crypto samples in the Linux kernel document.
Note: It seems the kernel crypto API v4.14 is different to v4.15+.
You can check the crypto support in kernel by:
cat /proc/cryptoThe SHA384 and SHA512 might not be enabled by default, it has to turn on with:
$ make linux-menuconfig
Cryptographic API —> SHA384 and SHA512 digest algorithmBuilt and tested on Debian 9.x (4.14.0-3-amd64).
# cbc-aes-aesni
cd aes-example
make
sudo dmesg -C
sudo insmod aes-example.ko
sudo rmmod aes-example.ko
sudo dmesg
Modified to be built and tested on Debian 9.x (4.14.0-3-amd64).
# shash (SHA1)
cd shash-example
make
sudo dmesg -C
sudo insmod shash-example.ko
sudo rmmod shash-example.ko
sudo dmesg
Cannot get compiled Debian 9.x (4.14.0-3-amd64).
# cbc-aes-aesni
cd aes-example
make
sudo dmesg -C
sudo insmod aes-example.ko
sudo rmmod aes-example.ko
sudo dmesg
# rand
# load drbg module
sudo modprobe drbg
cd rand-example
make
sudo dmesg -C
sudo insmod rand-example.ko
sudo rmmod rand-example.ko
sudo dmesg
Output
[ 2223.280561] test rand loaded
[ 2223.280597] RNG returned no data
[ 2223.280599] get_random_numbers return 0
[ 2223.280600] 10
[ 2223.280600] 58
[ 2223.280600] 77
[ 2223.280601] 69
[ 2223.280601] 48
[ 2223.280602] 19
[ 2223.280602] ca
[ 2223.280602] 43
[ 2223.280603] 2b
[ 2223.280603] a0
[ 2223.280604] de
[ 2223.280604] fa
[ 2223.280604] 88
[ 2223.280605] 63
[ 2223.280605] a3- Linux Kernel Cryptographic API for fun and profit
- Confessions of a security hardware driver maintainer
- A overview of Linux crypto subsystem
- Crypto headers: /usr/src/linux-headers-4.14.0-3-common/include/crypto
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