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Edit File : fips.sh \| Size : 5.53 KB
#!/bin/sh mount_boot() { boot=$(getarg boot=) if [ -n "$boot" ]; then case "$boot" in LABEL=) boot="$(echo $boot \| sed 's,/,\\x2f,g')" boot="/dev/disk/by-label/${boot#LABEL=}" ;; UUID=) boot="/dev/disk/by-uuid/${boot#UUID=}" ;; PARTUUID=) boot="/dev/disk/by-partuuid/${boot#PARTUUID=}" ;; PARTLABEL=) boot="/dev/disk/by-partlabel/${boot#PARTLABEL=}" ;; /dev/) ;; ) die "You have to specify boot=<boot device> as a boot option for fips=1" ;; esac if ! [ -e "$boot" ]; then udevadm trigger --action=add >/dev/null 2>&1 [ -z "$UDEVVERSION" ] && UDEVVERSION=$(udevadm --version \| { read v _ ; echo $v ; }) i=0 while ! [ -e $boot ]; do if [ $UDEVVERSION -ge 143 ]; then udevadm settle --exit-if-exists=$boot else udevadm settle --timeout=30 fi [ -e $boot ] && break sleep 0.5 i=$(($i+1)) [ $i -gt 40 ] && break done fi [ -e "$boot" ] \|\| return 1 mkdir /boot info "Mounting $boot as /boot" mount -oro "$boot" /boot \|\| return 1 elif [ -d "$NEWROOT/boot" ]; then rm -fr -- /boot ln -sf "$NEWROOT/boot" /boot fi } do_rhevh_check() { KERNEL=$(uname -r) kpath=${1} # If we're on RHEV-H, the kernel is in /run/initramfs/live/vmlinuz0 HMAC_SUM_ORIG=$(cat $NEWROOT/boot/.vmlinuz-${KERNEL}.hmac \| while read a b \|\| [ -n "$a" ]; do printf "%s\n" $a; done) HMAC_SUM_CALC=$(sha512hmac $kpath \| while read a b \|\| [ -n "$a" ]; do printf "%s\n" $a; done \|\| return 1) if [ -z "$HMAC_SUM_ORIG" ] \|\| [ -z "$HMAC_SUM_CALC" ] \|\| [ "${HMAC_SUM_ORIG}" != "${HMAC_SUM_CALC}" ]; then warn "HMAC sum mismatch" return 1 fi info "rhevh_check OK" return 0 } fips_load_crypto() { FIPSMODULES=$(cat /etc/fipsmodules) info "Loading and integrity checking all crypto modules" mv /etc/modprobe.d/fips.conf /etc/modprobe.d/fips.conf.bak for _module in $FIPSMODULES; do if [ "$_module" != "tcrypt" ]; then if ! modprobe "${_module}" 2>/tmp/fips.modprobe_err; then # check if kernel provides generic algo _found=0 while read _k _s _v \|\| [ -n "$_k" ]; do [ "$_k" != "name" -a "$_k" != "driver" ] && continue [ "$_v" != "$_module" ] && continue _found=1 break done </proc/crypto [ "$_found" = "0" ] && cat /tmp/fips.modprobe_err >&2 && return 1 fi fi done mv /etc/modprobe.d/fips.conf.bak /etc/modprobe.d/fips.conf info "Self testing crypto algorithms" modprobe tcrypt \|\| return 1 rmmod tcrypt } do_fips() { local _v local _s local _v local _module KERNEL=$(uname -r) info "Checking integrity of kernel" if [ -e "/run/initramfs/live/vmlinuz0" ]; then do_rhevh_check /run/initramfs/live/vmlinuz0 \|\| return 1 elif [ -e "/run/initramfs/live/isolinux/vmlinuz0" ]; then do_rhevh_check /run/initramfs/live/isolinux/vmlinuz0 \|\| return 1 else BOOT_IMAGE="$(getarg BOOT_IMAGE)" # On s390x, BOOT_IMAGE isn't a path but an integer representing the # entry number selected. Let's try the root of /boot first, and # otherwise fallback to trying to parse the BLS entries if it's a # BLS-based system. if [ "$(uname -m)" = s390x ]; then if [ -e "/boot/vmlinuz-${KERNEL}" ]; then BOOT_IMAGE="vmlinuz-${KERNEL}" elif [ -d /boot/loader/entries ]; then i=0 for bls in $(ls -d /boot/loader/entries/.conf \| sort -rV); do if [ $i -eq ${BOOT_IMAGE:-0} ] && [ -r "$bls" ]; then BOOT_IMAGE="$(grep -e '^linux' "$bls" \| grep -o ' .$')" BOOT_IMAGE=${BOOT_IMAGE:1} break fi ((i++)) done fi fi # Trim off any leading GRUB boot device (e.g. ($root) ) BOOT_IMAGE="$(echo "${BOOT_IMAGE}" \| sed 's/^(.)//')" BOOT_IMAGE_NAME="${BOOT_IMAGE##/}" BOOT_IMAGE_PATH="${BOOT_IMAGE%${BOOT_IMAGE_NAME}}" if [ -z "$BOOT_IMAGE_NAME" ]; then BOOT_IMAGE_NAME="vmlinuz-${KERNEL}" elif ! [ -e "/boot/${BOOT_IMAGE_PATH}/${BOOT_IMAGE_NAME}" ]; then #if /boot is not a separate partition BOOT_IMAGE might start with /boot BOOT_IMAGE_PATH=${BOOT_IMAGE_PATH#"/boot"} #on some achitectures BOOT_IMAGE does not contain path to kernel #so if we can't find anything, let's treat it in the same way as if it was empty if ! [ -e "/boot/${BOOT_IMAGE_PATH}/${BOOT_IMAGE_NAME}" ]; then BOOT_IMAGE_NAME="vmlinuz-${KERNEL}" BOOT_IMAGE_PATH="" fi fi BOOT_IMAGE_HMAC="/boot/${BOOT_IMAGE_PATH}/.${BOOT_IMAGE_NAME}.hmac" if ! [ -e "${BOOT_IMAGE_HMAC}" ]; then warn "${BOOT_IMAGE_HMAC} does not exist" return 1 fi (cd "${BOOT_IMAGE_HMAC%/*}" && sha512hmac -c "${BOOT_IMAGE_HMAC}") \|\| return 1 fi info "All initrd crypto checks done" > /tmp/fipsdone umount /boot >/dev/null 2>&1 return 0 } Back

Edit File : fips.sh | Size : 5.53 KB

#!/bin/sh

mount_boot()
{
    boot=$(getarg boot=)

if [ -n "$boot" ]; then
        case "$boot" in
        LABEL=*)
            boot="$(echo $boot | sed 's,/,\\x2f,g')"
            boot="/dev/disk/by-label/${boot#LABEL=}"
            ;;
        UUID=*)
            boot="/dev/disk/by-uuid/${boot#UUID=}"
            ;;
        PARTUUID=*)
            boot="/dev/disk/by-partuuid/${boot#PARTUUID=}"
            ;;
        PARTLABEL=*)
            boot="/dev/disk/by-partlabel/${boot#PARTLABEL=}"
            ;;
        /dev/*)
            ;;
        *)
            die "You have to specify boot=<boot device> as a boot option for fips=1" ;;
        esac

if ! [ -e "$boot" ]; then
            udevadm trigger --action=add >/dev/null 2>&1
            [ -z "$UDEVVERSION" ] && UDEVVERSION=$(udevadm --version | { read v _ ; echo $v ; })
            i=0
            while ! [ -e $boot ]; do
                if [ $UDEVVERSION -ge 143 ]; then
                    udevadm settle --exit-if-exists=$boot
                else
                    udevadm settle --timeout=30
                fi
                [ -e $boot ] && break
                sleep 0.5
                i=$(($i+1))
                [ $i -gt 40 ] && break
            done
        fi

[ -e "$boot" ] || return 1

mkdir /boot
        info "Mounting $boot as /boot"
        mount -oro "$boot" /boot || return 1
    elif [ -d "$NEWROOT/boot" ]; then
        rm -fr -- /boot
        ln -sf "$NEWROOT/boot" /boot
    fi
}

do_rhevh_check()
{
    KERNEL=$(uname -r)
    kpath=${1}

# If we're on RHEV-H, the kernel is in /run/initramfs/live/vmlinuz0
    HMAC_SUM_ORIG=$(cat $NEWROOT/boot/.vmlinuz-${KERNEL}.hmac | while read a b || [ -n "$a" ]; do printf "%s\n" $a; done)
    HMAC_SUM_CALC=$(sha512hmac $kpath | while read a b || [ -n "$a" ]; do printf "%s\n" $a; done || return 1)
    if [ -z "$HMAC_SUM_ORIG" ] || [ -z "$HMAC_SUM_CALC" ] || [ "${HMAC_SUM_ORIG}" != "${HMAC_SUM_CALC}" ]; then
        warn "HMAC sum mismatch"
        return 1
    fi
    info "rhevh_check OK"
    return 0
}

fips_load_crypto()
{
    FIPSMODULES=$(cat /etc/fipsmodules)

info "Loading and integrity checking all crypto modules"
    mv /etc/modprobe.d/fips.conf /etc/modprobe.d/fips.conf.bak
    for _module in $FIPSMODULES; do
        if [ "$_module" != "tcrypt" ]; then
            if ! modprobe "${_module}" 2>/tmp/fips.modprobe_err; then
                # check if kernel provides generic algo
                _found=0
                while read _k _s _v || [ -n "$_k" ]; do
                    [ "$_k" != "name" -a "$_k" != "driver" ] && continue
                    [ "$_v" != "$_module" ] && continue
                    _found=1
                    break
                done </proc/crypto
                [ "$_found" = "0" ] && cat /tmp/fips.modprobe_err >&2 && return 1
            fi
        fi
    done
    mv /etc/modprobe.d/fips.conf.bak /etc/modprobe.d/fips.conf

info "Self testing crypto algorithms"
    modprobe tcrypt || return 1
    rmmod tcrypt
}

do_fips()
{
    local _v
    local _s
    local _v
    local _module

KERNEL=$(uname -r)

info "Checking integrity of kernel"
    if [ -e "/run/initramfs/live/vmlinuz0" ]; then
        do_rhevh_check /run/initramfs/live/vmlinuz0 || return 1
    elif [ -e "/run/initramfs/live/isolinux/vmlinuz0" ]; then
        do_rhevh_check /run/initramfs/live/isolinux/vmlinuz0 || return 1
    else
        BOOT_IMAGE="$(getarg BOOT_IMAGE)"

# On s390x, BOOT_IMAGE isn't a path but an integer representing the
        # entry number selected. Let's try the root of /boot first, and
        # otherwise fallback to trying to parse the BLS entries if it's a
        # BLS-based system.
        if [ "$(uname -m)" = s390x ]; then
            if [ -e "/boot/vmlinuz-${KERNEL}" ]; then
                BOOT_IMAGE="vmlinuz-${KERNEL}"
            elif [ -d /boot/loader/entries ]; then
                i=0
                for bls in $(ls -d /boot/loader/entries/*.conf | sort -rV); do
                  if [ $i -eq ${BOOT_IMAGE:-0} ] && [ -r "$bls" ]; then
                      BOOT_IMAGE="$(grep -e '^linux' "$bls" | grep -o ' .*$')"
                      BOOT_IMAGE=${BOOT_IMAGE:1}
                      break
                  fi

((i++))
                done
            fi
        fi

# Trim off any leading GRUB boot device (e.g. ($root) )
        BOOT_IMAGE="$(echo "${BOOT_IMAGE}" | sed 's/^(.*)//')"

BOOT_IMAGE_NAME="${BOOT_IMAGE##*/}"
        BOOT_IMAGE_PATH="${BOOT_IMAGE%${BOOT_IMAGE_NAME}}"

if [ -z "$BOOT_IMAGE_NAME" ]; then
            BOOT_IMAGE_NAME="vmlinuz-${KERNEL}"
        elif ! [ -e "/boot/${BOOT_IMAGE_PATH}/${BOOT_IMAGE_NAME}" ]; then
            #if /boot is not a separate partition BOOT_IMAGE might start with /boot
            BOOT_IMAGE_PATH=${BOOT_IMAGE_PATH#"/boot"}
            #on some achitectures BOOT_IMAGE does not contain path to kernel
            #so if we can't find anything, let's treat it in the same way as if it was empty
            if ! [ -e "/boot/${BOOT_IMAGE_PATH}/${BOOT_IMAGE_NAME}" ]; then
                BOOT_IMAGE_NAME="vmlinuz-${KERNEL}"
                BOOT_IMAGE_PATH=""
            fi
        fi

BOOT_IMAGE_HMAC="/boot/${BOOT_IMAGE_PATH}/.${BOOT_IMAGE_NAME}.hmac"
        if ! [ -e "${BOOT_IMAGE_HMAC}" ]; then
            warn "${BOOT_IMAGE_HMAC} does not exist"
            return 1
        fi

(cd "${BOOT_IMAGE_HMAC%/*}" && sha512hmac -c "${BOOT_IMAGE_HMAC}") || return 1
    fi

info "All initrd crypto checks done"

> /tmp/fipsdone

umount /boot >/dev/null 2>&1

return 0
}

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