#!/bin/bash

# called by dracut
check() {
    return 255
}

# called by dracut
depends() {
    return 0
}

# called by dracut
installkernel() {
    local _fipsmodules _mod
    if [[ -f "${srcmods}/modules.fips" ]]; then
        _fipsmodules="$(cat "${srcmods}/modules.fips")"
    else
        _fipsmodules="aead aes_generic aes-x86_64 ansi_cprng arc4 authenc authencesn blowfish camellia cast6 cbc ccm "
        _fipsmodules+="chainiv crc32c crct10dif_generic cryptomgr crypto_null ctr cts deflate des des3_ede dm-crypt dm-mod drbg "
        _fipsmodules+="ecb eseqiv fcrypt gcm ghash_generic hmac khazad lzo md4 md5 michael_mic rmd128 "
        _fipsmodules+="rmd160 rmd256 rmd320 rot13 salsa20 seed seqiv serpent sha1 sha224 sha256 sha256_generic "
        _fipsmodules+="sha384 sha512 sha512_generic tcrypt tea tnepres twofish wp256 wp384 wp512 xeta xtea xts zlib "
        _fipsmodules+="aes_s390 des_s390 prng sha256_s390 sha_common des_check_key ghash_s390 sha1_s390 sha512_s390 cmac authenc "
    fi

    mkdir -m 0755 -p "${initdir}/etc/modprobe.d"

    for _mod in $_fipsmodules; do
        if hostonly='' instmods -c -s $_mod; then
            echo $_mod >> "${initdir}/etc/fipsmodules"
            echo "blacklist $_mod" >> "${initdir}/etc/modprobe.d/fips.conf"
        fi
    done
}

# called by dracut
install() {
    local _dir
    inst_hook pre-trigger 01 "$moddir/fips-boot.sh"
    inst_hook pre-pivot 01 "$moddir/fips-noboot.sh"
    inst_script "$moddir/fips.sh" /sbin/fips.sh

    inst_multiple sha512hmac rmmod insmod mount uname umount fipscheck

    inst_libdir_file libsoftokn3.so libsoftokn3.so \
        libsoftokn3.chk libfreebl3.so libfreebl3.chk \
        libssl.so 'hmaccalc/sha512hmac.hmac' libssl.so.10 \
        libfreeblpriv3.so libfreeblpriv3.chk

    inst_multiple -o prelink
    inst_simple /etc/system-fips
    [ -c ${initdir}/dev/random ] || mknod ${initdir}/dev/random c 1 8 \
        || {
            dfatal "Cannot create /dev/random"
            dfatal "To create an initramfs with fips support, dracut has to run as root"
            return 1
        }
    [ -c ${initdir}/dev/urandom ] || mknod ${initdir}/dev/urandom c 1 9 \
        || {
            dfatal "Cannot create /dev/random"
            dfatal "To create an initramfs with fips support, dracut has to run as root"
            return 1
        }
}
