MIPS IPsec library

Forked from https://sourceforge.net/projects/mcespi/files/

Those of you that are on MIPS big endian machines can replace the default aes_generic.ko, sha_generic.ko, cbc.ko and md5.ko modules with a single assembler optimized mcespi.ko. The module is quite some years old and a first experience with crypto modules. Nevertheless it will work quite fine but needs manual compiling. The easyiest way to install it includes a few steps.

• create a buildroot environment
• compile an image for your router once
• put the mcespi.c into the the folder build_dir/target-<arch>/linux-<cpu-model>/linux-X.Y.Z/crypto
• Include the line obj-$(CONFIG_CRYPTO_MD5) += mcespi.o into build_dir/target-<arch>/linux-<cpu-model>/linux-X.Y.Z/crypto/Makefile
• compile the image once again.
• Afterwards you will find build_dir/target-<arch>/linux-<cpu-model>/linux-X.Y.Z/crypto/mcespi.ko
• Put mcespi.ko to your router into /lib/modules/<X.Y.Z>
• Load the module with insmod
• For automatic loading create a new /etc/modules.d/09-crypto-mcespi with corresponding content.

(documentation taken from https://openwrt.org/docs/guide-user/services/vpn/ipsec/strongswan/performance#mips_tuning)