fd78240ac8
At some point, I'd like to make another attempt at71f1f4884b("openssl: stop static binaries referencing libs"), which was reverted in195c7da07d. One problem with my previous attempt is that I moved OpenSSL's libraries to a lib output, but many dependent packages were hardcoding the out output as the location of the libraries. This patch fixes every such case I could find in the tree. It won't have any effect immediately, but will mean these packages will automatically use an OpenSSL lib output if it is reintroduced in future. This patch should cause very few rebuilds, because it shouldn't make any change at all to most packages I'm touching. The few rebuilds that are introduced come from when I've changed a package builder not to use variable names like openssl.out in scripts / substitution patterns, which would be confusing since they don't hardcode the output any more. I started by making the following global replacements: ${pkgs.openssl.out}/lib -> ${lib.getLib pkgs.openssl}/lib ${openssl.out}/lib -> ${lib.getLib openssl}/lib Then I removed the ".out" suffix when part of the argument to lib.makeLibraryPath, since that function uses lib.getLib internally. Then I fixed up cases where openssl was part of the -L flag to the compiler/linker, since that unambigously is referring to libraries. Then I manually investigated and fixed the following packages: - pycurl - citrix-workspace - ppp - wraith - unbound - gambit - acl2 I'm reasonably confindent in my fixes for all of them. For acl2, since the openssl library paths are manually provided above anyway, I don't think openssl is required separately as a build input at all. Removing it doesn't make a difference to the output size, the file list, or the closure. I've tested evaluation with the OfBorg meta checks, to protect against introducing evaluation failures.
941 lines
32 KiB
Nix
941 lines
32 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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luks = config.boot.initrd.luks;
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kernelPackages = config.boot.kernelPackages;
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commonFunctions = ''
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die() {
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echo "$@" >&2
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exit 1
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}
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dev_exist() {
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local target="$1"
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if [ -e $target ]; then
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return 0
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else
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local uuid=$(echo -n $target | sed -e 's,UUID=\(.*\),\1,g')
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blkid --uuid $uuid >/dev/null
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return $?
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fi
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}
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wait_target() {
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local name="$1"
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local target="$2"
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local secs="''${3:-10}"
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local desc="''${4:-$name $target to appear}"
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if ! dev_exist $target; then
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echo -n "Waiting $secs seconds for $desc..."
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local success=false;
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for try in $(seq $secs); do
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echo -n "."
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sleep 1
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if dev_exist $target; then
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success=true
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break
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fi
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done
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if [ $success == true ]; then
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echo " - success";
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return 0
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else
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echo " - failure";
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return 1
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fi
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fi
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return 0
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}
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wait_yubikey() {
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local secs="''${1:-10}"
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ykinfo -v 1>/dev/null 2>&1
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if [ $? != 0 ]; then
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echo -n "Waiting $secs seconds for YubiKey to appear..."
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local success=false
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for try in $(seq $secs); do
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echo -n .
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sleep 1
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ykinfo -v 1>/dev/null 2>&1
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if [ $? == 0 ]; then
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success=true
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break
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fi
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done
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if [ $success == true ]; then
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echo " - success";
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return 0
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else
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echo " - failure";
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return 1
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fi
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fi
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return 0
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}
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wait_gpgcard() {
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local secs="''${1:-10}"
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gpg --card-status > /dev/null 2> /dev/null
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if [ $? != 0 ]; then
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echo -n "Waiting $secs seconds for GPG Card to appear"
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local success=false
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for try in $(seq $secs); do
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echo -n .
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sleep 1
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gpg --card-status > /dev/null 2> /dev/null
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if [ $? == 0 ]; then
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success=true
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break
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fi
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done
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if [ $success == true ]; then
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echo " - success";
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return 0
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else
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echo " - failure";
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return 1
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fi
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fi
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return 0
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}
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'';
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preCommands = ''
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# A place to store crypto things
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# A ramfs is used here to ensure that the file used to update
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# the key slot with cryptsetup will never get swapped out.
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# Warning: Do NOT replace with tmpfs!
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mkdir -p /crypt-ramfs
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mount -t ramfs none /crypt-ramfs
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# Cryptsetup locking directory
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mkdir -p /run/cryptsetup
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# For YubiKey salt storage
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mkdir -p /crypt-storage
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${optionalString luks.gpgSupport ''
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export GPG_TTY=$(tty)
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export GNUPGHOME=/crypt-ramfs/.gnupg
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gpg-agent --daemon --scdaemon-program $out/bin/scdaemon > /dev/null 2> /dev/null
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''}
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# Disable all input echo for the whole stage. We could use read -s
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# instead but that would ocasionally leak characters between read
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# invocations.
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stty -echo
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'';
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postCommands = ''
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stty echo
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umount /crypt-storage 2>/dev/null
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umount /crypt-ramfs 2>/dev/null
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'';
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openCommand = name: dev: assert name == dev.name;
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let
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csopen = "cryptsetup luksOpen ${dev.device} ${dev.name}"
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+ optionalString dev.allowDiscards " --allow-discards"
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+ optionalString dev.bypassWorkqueues " --perf-no_read_workqueue --perf-no_write_workqueue"
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+ optionalString (dev.header != null) " --header=${dev.header}";
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cschange = "cryptsetup luksChangeKey ${dev.device} ${optionalString (dev.header != null) "--header=${dev.header}"}";
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in ''
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# Wait for luksRoot (and optionally keyFile and/or header) to appear, e.g.
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# if on a USB drive.
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wait_target "device" ${dev.device} || die "${dev.device} is unavailable"
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${optionalString (dev.header != null) ''
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wait_target "header" ${dev.header} || die "${dev.header} is unavailable"
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''}
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do_open_passphrase() {
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local passphrase
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while true; do
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echo -n "Passphrase for ${dev.device}: "
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passphrase=
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while true; do
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if [ -e /crypt-ramfs/passphrase ]; then
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echo "reused"
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passphrase=$(cat /crypt-ramfs/passphrase)
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break
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else
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# ask cryptsetup-askpass
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echo -n "${dev.device}" > /crypt-ramfs/device
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# and try reading it from /dev/console with a timeout
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IFS= read -t 1 -r passphrase
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if [ -n "$passphrase" ]; then
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${if luks.reusePassphrases then ''
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# remember it for the next device
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echo -n "$passphrase" > /crypt-ramfs/passphrase
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'' else ''
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# Don't save it to ramfs. We are very paranoid
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''}
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echo
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break
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fi
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fi
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done
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echo -n "Verifying passphrase for ${dev.device}..."
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echo -n "$passphrase" | ${csopen} --key-file=-
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if [ $? == 0 ]; then
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echo " - success"
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${if luks.reusePassphrases then ''
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# we don't rm here because we might reuse it for the next device
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'' else ''
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rm -f /crypt-ramfs/passphrase
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''}
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break
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else
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echo " - failure"
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# ask for a different one
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rm -f /crypt-ramfs/passphrase
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fi
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done
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}
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# LUKS
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open_normally() {
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${if (dev.keyFile != null) then ''
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if wait_target "key file" ${dev.keyFile}; then
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${csopen} --key-file=${dev.keyFile} \
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${optionalString (dev.keyFileSize != null) "--keyfile-size=${toString dev.keyFileSize}"} \
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${optionalString (dev.keyFileOffset != null) "--keyfile-offset=${toString dev.keyFileOffset}"}
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else
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${if dev.fallbackToPassword then "echo" else "die"} "${dev.keyFile} is unavailable"
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echo " - failing back to interactive password prompt"
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do_open_passphrase
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fi
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'' else ''
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do_open_passphrase
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''}
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}
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${optionalString (luks.yubikeySupport && (dev.yubikey != null)) ''
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# YubiKey
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rbtohex() {
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( od -An -vtx1 | tr -d ' \n' )
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}
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hextorb() {
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( tr '[:lower:]' '[:upper:]' | sed -e 's/\([0-9A-F]\{2\}\)/\\\\\\x\1/gI' | xargs printf )
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}
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do_open_yubikey() {
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# Make all of these local to this function
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# to prevent their values being leaked
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local salt
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local iterations
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local k_user
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local challenge
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local response
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local k_luks
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local opened
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local new_salt
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local new_iterations
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local new_challenge
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local new_response
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local new_k_luks
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mount -t ${dev.yubikey.storage.fsType} ${dev.yubikey.storage.device} /crypt-storage || \
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die "Failed to mount YubiKey salt storage device"
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salt="$(cat /crypt-storage${dev.yubikey.storage.path} | sed -n 1p | tr -d '\n')"
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iterations="$(cat /crypt-storage${dev.yubikey.storage.path} | sed -n 2p | tr -d '\n')"
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challenge="$(echo -n $salt | openssl-wrap dgst -binary -sha512 | rbtohex)"
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response="$(ykchalresp -${toString dev.yubikey.slot} -x $challenge 2>/dev/null)"
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for try in $(seq 3); do
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${optionalString dev.yubikey.twoFactor ''
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echo -n "Enter two-factor passphrase: "
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k_user=
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while true; do
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if [ -e /crypt-ramfs/passphrase ]; then
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echo "reused"
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k_user=$(cat /crypt-ramfs/passphrase)
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break
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else
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# Try reading it from /dev/console with a timeout
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IFS= read -t 1 -r k_user
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if [ -n "$k_user" ]; then
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${if luks.reusePassphrases then ''
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# Remember it for the next device
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echo -n "$k_user" > /crypt-ramfs/passphrase
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'' else ''
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# Don't save it to ramfs. We are very paranoid
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''}
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echo
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break
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fi
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fi
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done
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''}
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if [ ! -z "$k_user" ]; then
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k_luks="$(echo -n $k_user | pbkdf2-sha512 ${toString dev.yubikey.keyLength} $iterations $response | rbtohex)"
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else
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k_luks="$(echo | pbkdf2-sha512 ${toString dev.yubikey.keyLength} $iterations $response | rbtohex)"
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fi
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echo -n "$k_luks" | hextorb | ${csopen} --key-file=-
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if [ $? == 0 ]; then
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opened=true
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${if luks.reusePassphrases then ''
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# We don't rm here because we might reuse it for the next device
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'' else ''
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rm -f /crypt-ramfs/passphrase
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''}
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break
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else
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opened=false
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echo "Authentication failed!"
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fi
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done
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[ "$opened" == false ] && die "Maximum authentication errors reached"
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echo -n "Gathering entropy for new salt (please enter random keys to generate entropy if this blocks for long)..."
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for i in $(seq ${toString dev.yubikey.saltLength}); do
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byte="$(dd if=/dev/random bs=1 count=1 2>/dev/null | rbtohex)";
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new_salt="$new_salt$byte";
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echo -n .
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done;
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echo "ok"
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new_iterations="$iterations"
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${optionalString (dev.yubikey.iterationStep > 0) ''
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new_iterations="$(($new_iterations + ${toString dev.yubikey.iterationStep}))"
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''}
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new_challenge="$(echo -n $new_salt | openssl-wrap dgst -binary -sha512 | rbtohex)"
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new_response="$(ykchalresp -${toString dev.yubikey.slot} -x $new_challenge 2>/dev/null)"
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|
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if [ ! -z "$k_user" ]; then
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new_k_luks="$(echo -n $k_user | pbkdf2-sha512 ${toString dev.yubikey.keyLength} $new_iterations $new_response | rbtohex)"
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else
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new_k_luks="$(echo | pbkdf2-sha512 ${toString dev.yubikey.keyLength} $new_iterations $new_response | rbtohex)"
|
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fi
|
|
|
|
echo -n "$new_k_luks" | hextorb > /crypt-ramfs/new_key
|
|
echo -n "$k_luks" | hextorb | ${cschange} --key-file=- /crypt-ramfs/new_key
|
|
|
|
if [ $? == 0 ]; then
|
|
echo -ne "$new_salt\n$new_iterations" > /crypt-storage${dev.yubikey.storage.path}
|
|
sync /crypt-storage${dev.yubikey.storage.path}
|
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else
|
|
echo "Warning: Could not update LUKS key, current challenge persists!"
|
|
fi
|
|
|
|
rm -f /crypt-ramfs/new_key
|
|
umount /crypt-storage
|
|
}
|
|
|
|
open_with_hardware() {
|
|
if wait_yubikey ${toString dev.yubikey.gracePeriod}; then
|
|
do_open_yubikey
|
|
else
|
|
echo "No YubiKey found, falling back to non-YubiKey open procedure"
|
|
open_normally
|
|
fi
|
|
}
|
|
''}
|
|
|
|
${optionalString (luks.gpgSupport && (dev.gpgCard != null)) ''
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|
|
|
do_open_gpg_card() {
|
|
# Make all of these local to this function
|
|
# to prevent their values being leaked
|
|
local pin
|
|
local opened
|
|
|
|
gpg --import /gpg-keys/${dev.device}/pubkey.asc > /dev/null 2> /dev/null
|
|
|
|
gpg --card-status > /dev/null 2> /dev/null
|
|
|
|
for try in $(seq 3); do
|
|
echo -n "PIN for GPG Card associated with device ${dev.device}: "
|
|
pin=
|
|
while true; do
|
|
if [ -e /crypt-ramfs/passphrase ]; then
|
|
echo "reused"
|
|
pin=$(cat /crypt-ramfs/passphrase)
|
|
break
|
|
else
|
|
# and try reading it from /dev/console with a timeout
|
|
IFS= read -t 1 -r pin
|
|
if [ -n "$pin" ]; then
|
|
${if luks.reusePassphrases then ''
|
|
# remember it for the next device
|
|
echo -n "$pin" > /crypt-ramfs/passphrase
|
|
'' else ''
|
|
# Don't save it to ramfs. We are very paranoid
|
|
''}
|
|
echo
|
|
break
|
|
fi
|
|
fi
|
|
done
|
|
echo -n "Verifying passphrase for ${dev.device}..."
|
|
echo -n "$pin" | gpg -q --batch --passphrase-fd 0 --pinentry-mode loopback -d /gpg-keys/${dev.device}/cryptkey.gpg 2> /dev/null | ${csopen} --key-file=- > /dev/null 2> /dev/null
|
|
if [ $? == 0 ]; then
|
|
echo " - success"
|
|
${if luks.reusePassphrases then ''
|
|
# we don't rm here because we might reuse it for the next device
|
|
'' else ''
|
|
rm -f /crypt-ramfs/passphrase
|
|
''}
|
|
break
|
|
else
|
|
echo " - failure"
|
|
# ask for a different one
|
|
rm -f /crypt-ramfs/passphrase
|
|
fi
|
|
done
|
|
|
|
[ "$opened" == false ] && die "Maximum authentication errors reached"
|
|
}
|
|
|
|
open_with_hardware() {
|
|
if wait_gpgcard ${toString dev.gpgCard.gracePeriod}; then
|
|
do_open_gpg_card
|
|
else
|
|
echo "No GPG Card found, falling back to normal open procedure"
|
|
open_normally
|
|
fi
|
|
}
|
|
''}
|
|
|
|
${optionalString (luks.fido2Support && (dev.fido2.credential != null)) ''
|
|
|
|
open_with_hardware() {
|
|
local passsphrase
|
|
|
|
${if dev.fido2.passwordLess then ''
|
|
export passphrase=""
|
|
'' else ''
|
|
read -rsp "FIDO2 salt for ${dev.device}: " passphrase
|
|
echo
|
|
''}
|
|
${optionalString (lib.versionOlder kernelPackages.kernel.version "5.4") ''
|
|
echo "On systems with Linux Kernel < 5.4, it might take a while to initialize the CRNG, you might want to use linuxPackages_latest."
|
|
echo "Please move your mouse to create needed randomness."
|
|
''}
|
|
echo "Waiting for your FIDO2 device..."
|
|
fido2luks open ${dev.device} ${dev.name} ${dev.fido2.credential} --await-dev ${toString dev.fido2.gracePeriod} --salt string:$passphrase
|
|
if [ $? -ne 0 ]; then
|
|
echo "No FIDO2 key found, falling back to normal open procedure"
|
|
open_normally
|
|
fi
|
|
}
|
|
''}
|
|
|
|
# commands to run right before we mount our device
|
|
${dev.preOpenCommands}
|
|
|
|
${if (luks.yubikeySupport && (dev.yubikey != null)) || (luks.gpgSupport && (dev.gpgCard != null)) || (luks.fido2Support && (dev.fido2.credential != null)) then ''
|
|
open_with_hardware
|
|
'' else ''
|
|
open_normally
|
|
''}
|
|
|
|
# commands to run right after we mounted our device
|
|
${dev.postOpenCommands}
|
|
'';
|
|
|
|
askPass = pkgs.writeScriptBin "cryptsetup-askpass" ''
|
|
#!/bin/sh
|
|
|
|
${commonFunctions}
|
|
|
|
while true; do
|
|
wait_target "luks" /crypt-ramfs/device 10 "LUKS to request a passphrase" || die "Passphrase is not requested now"
|
|
device=$(cat /crypt-ramfs/device)
|
|
|
|
echo -n "Passphrase for $device: "
|
|
IFS= read -rs passphrase
|
|
echo
|
|
|
|
rm /crypt-ramfs/device
|
|
echo -n "$passphrase" > /crypt-ramfs/passphrase
|
|
done
|
|
'';
|
|
|
|
preLVM = filterAttrs (n: v: v.preLVM) luks.devices;
|
|
postLVM = filterAttrs (n: v: !v.preLVM) luks.devices;
|
|
|
|
in
|
|
{
|
|
imports = [
|
|
(mkRemovedOptionModule [ "boot" "initrd" "luks" "enable" ] "")
|
|
];
|
|
|
|
options = {
|
|
|
|
boot.initrd.luks.mitigateDMAAttacks = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
Unless enabled, encryption keys can be easily recovered by an attacker with physical
|
|
access to any machine with PCMCIA, ExpressCard, ThunderBolt or FireWire port.
|
|
More information is available at <link xlink:href="http://en.wikipedia.org/wiki/DMA_attack"/>.
|
|
|
|
This option blacklists FireWire drivers, but doesn't remove them. You can manually
|
|
load the drivers if you need to use a FireWire device, but don't forget to unload them!
|
|
'';
|
|
};
|
|
|
|
boot.initrd.luks.cryptoModules = mkOption {
|
|
type = types.listOf types.str;
|
|
default =
|
|
[ "aes" "aes_generic" "blowfish" "twofish"
|
|
"serpent" "cbc" "xts" "lrw" "sha1" "sha256" "sha512"
|
|
"af_alg" "algif_skcipher"
|
|
];
|
|
description = ''
|
|
A list of cryptographic kernel modules needed to decrypt the root device(s).
|
|
The default includes all common modules.
|
|
'';
|
|
};
|
|
|
|
boot.initrd.luks.forceLuksSupportInInitrd = mkOption {
|
|
type = types.bool;
|
|
default = false;
|
|
internal = true;
|
|
description = ''
|
|
Whether to configure luks support in the initrd, when no luks
|
|
devices are configured.
|
|
'';
|
|
};
|
|
|
|
boot.initrd.luks.reusePassphrases = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
When opening a new LUKS device try reusing last successful
|
|
passphrase.
|
|
|
|
Useful for mounting a number of devices that use the same
|
|
passphrase without retyping it several times.
|
|
|
|
Such setup can be useful if you use <command>cryptsetup
|
|
luksSuspend</command>. Different LUKS devices will still have
|
|
different master keys even when using the same passphrase.
|
|
'';
|
|
};
|
|
|
|
boot.initrd.luks.devices = mkOption {
|
|
default = { };
|
|
example = { luksroot.device = "/dev/disk/by-uuid/430e9eff-d852-4f68-aa3b-2fa3599ebe08"; };
|
|
description = ''
|
|
The encrypted disk that should be opened before the root
|
|
filesystem is mounted. Both LVM-over-LUKS and LUKS-over-LVM
|
|
setups are supported. The unencrypted devices can be accessed as
|
|
<filename>/dev/mapper/<replaceable>name</replaceable></filename>.
|
|
'';
|
|
|
|
type = with types; attrsOf (submodule (
|
|
{ name, ... }: { options = {
|
|
|
|
name = mkOption {
|
|
visible = false;
|
|
default = name;
|
|
example = "luksroot";
|
|
type = types.str;
|
|
description = "Name of the unencrypted device in <filename>/dev/mapper</filename>.";
|
|
};
|
|
|
|
device = mkOption {
|
|
example = "/dev/disk/by-uuid/430e9eff-d852-4f68-aa3b-2fa3599ebe08";
|
|
type = types.str;
|
|
description = "Path of the underlying encrypted block device.";
|
|
};
|
|
|
|
header = mkOption {
|
|
default = null;
|
|
example = "/root/header.img";
|
|
type = types.nullOr types.str;
|
|
description = ''
|
|
The name of the file or block device that
|
|
should be used as header for the encrypted device.
|
|
'';
|
|
};
|
|
|
|
keyFile = mkOption {
|
|
default = null;
|
|
example = "/dev/sdb1";
|
|
type = types.nullOr types.str;
|
|
description = ''
|
|
The name of the file (can be a raw device or a partition) that
|
|
should be used as the decryption key for the encrypted device. If
|
|
not specified, you will be prompted for a passphrase instead.
|
|
'';
|
|
};
|
|
|
|
keyFileSize = mkOption {
|
|
default = null;
|
|
example = 4096;
|
|
type = types.nullOr types.int;
|
|
description = ''
|
|
The size of the key file. Use this if only the beginning of the
|
|
key file should be used as a key (often the case if a raw device
|
|
or partition is used as key file). If not specified, the whole
|
|
<literal>keyFile</literal> will be used decryption, instead of just
|
|
the first <literal>keyFileSize</literal> bytes.
|
|
'';
|
|
};
|
|
|
|
keyFileOffset = mkOption {
|
|
default = null;
|
|
example = 4096;
|
|
type = types.nullOr types.int;
|
|
description = ''
|
|
The offset of the key file. Use this in combination with
|
|
<literal>keyFileSize</literal> to use part of a file as key file
|
|
(often the case if a raw device or partition is used as a key file).
|
|
If not specified, the key begins at the first byte of
|
|
<literal>keyFile</literal>.
|
|
'';
|
|
};
|
|
|
|
# FIXME: get rid of this option.
|
|
preLVM = mkOption {
|
|
default = true;
|
|
type = types.bool;
|
|
description = "Whether the luksOpen will be attempted before LVM scan or after it.";
|
|
};
|
|
|
|
allowDiscards = mkOption {
|
|
default = false;
|
|
type = types.bool;
|
|
description = ''
|
|
Whether to allow TRIM requests to the underlying device. This option
|
|
has security implications; please read the LUKS documentation before
|
|
activating it.
|
|
This option is incompatible with authenticated encryption (dm-crypt
|
|
stacked over dm-integrity).
|
|
'';
|
|
};
|
|
|
|
bypassWorkqueues = mkOption {
|
|
default = false;
|
|
type = types.bool;
|
|
description = ''
|
|
Whether to bypass dm-crypt's internal read and write workqueues.
|
|
Enabling this should improve performance on SSDs; see
|
|
<link xlink:href="https://wiki.archlinux.org/index.php/Dm-crypt/Specialties#Disable_workqueue_for_increased_solid_state_drive_(SSD)_performance">here</link>
|
|
for more information. Needs Linux 5.9 or later.
|
|
'';
|
|
};
|
|
|
|
fallbackToPassword = mkOption {
|
|
default = false;
|
|
type = types.bool;
|
|
description = ''
|
|
Whether to fallback to interactive passphrase prompt if the keyfile
|
|
cannot be found. This will prevent unattended boot should the keyfile
|
|
go missing.
|
|
'';
|
|
};
|
|
|
|
gpgCard = mkOption {
|
|
default = null;
|
|
description = ''
|
|
The option to use this LUKS device with a GPG encrypted luks password by the GPG Smartcard.
|
|
If null (the default), GPG-Smartcard will be disabled for this device.
|
|
'';
|
|
|
|
type = with types; nullOr (submodule {
|
|
options = {
|
|
gracePeriod = mkOption {
|
|
default = 10;
|
|
type = types.int;
|
|
description = "Time in seconds to wait for the GPG Smartcard.";
|
|
};
|
|
|
|
encryptedPass = mkOption {
|
|
type = types.path;
|
|
description = "Path to the GPG encrypted passphrase.";
|
|
};
|
|
|
|
publicKey = mkOption {
|
|
type = types.path;
|
|
description = "Path to the Public Key.";
|
|
};
|
|
};
|
|
});
|
|
};
|
|
|
|
fido2 = {
|
|
credential = mkOption {
|
|
default = null;
|
|
example = "f1d00200d8dc783f7fb1e10ace8da27f8312d72692abfca2f7e4960a73f48e82e1f7571f6ebfcee9fb434f9886ccc8fcc52a6614d8d2";
|
|
type = types.nullOr types.str;
|
|
description = "The FIDO2 credential ID.";
|
|
};
|
|
|
|
gracePeriod = mkOption {
|
|
default = 10;
|
|
type = types.int;
|
|
description = "Time in seconds to wait for the FIDO2 key.";
|
|
};
|
|
|
|
passwordLess = mkOption {
|
|
default = false;
|
|
type = types.bool;
|
|
description = ''
|
|
Defines whatever to use an empty string as a default salt.
|
|
|
|
Enable only when your device is PIN protected, such as <link xlink:href="https://trezor.io/">Trezor</link>.
|
|
'';
|
|
};
|
|
};
|
|
|
|
yubikey = mkOption {
|
|
default = null;
|
|
description = ''
|
|
The options to use for this LUKS device in YubiKey-PBA.
|
|
If null (the default), YubiKey-PBA will be disabled for this device.
|
|
'';
|
|
|
|
type = with types; nullOr (submodule {
|
|
options = {
|
|
twoFactor = mkOption {
|
|
default = true;
|
|
type = types.bool;
|
|
description = "Whether to use a passphrase and a YubiKey (true), or only a YubiKey (false).";
|
|
};
|
|
|
|
slot = mkOption {
|
|
default = 2;
|
|
type = types.int;
|
|
description = "Which slot on the YubiKey to challenge.";
|
|
};
|
|
|
|
saltLength = mkOption {
|
|
default = 16;
|
|
type = types.int;
|
|
description = "Length of the new salt in byte (64 is the effective maximum).";
|
|
};
|
|
|
|
keyLength = mkOption {
|
|
default = 64;
|
|
type = types.int;
|
|
description = "Length of the LUKS slot key derived with PBKDF2 in byte.";
|
|
};
|
|
|
|
iterationStep = mkOption {
|
|
default = 0;
|
|
type = types.int;
|
|
description = "How much the iteration count for PBKDF2 is increased at each successful authentication.";
|
|
};
|
|
|
|
gracePeriod = mkOption {
|
|
default = 10;
|
|
type = types.int;
|
|
description = "Time in seconds to wait for the YubiKey.";
|
|
};
|
|
|
|
/* TODO: Add to the documentation of the current module:
|
|
|
|
Options related to the storing the salt.
|
|
*/
|
|
storage = {
|
|
device = mkOption {
|
|
default = "/dev/sda1";
|
|
type = types.path;
|
|
description = ''
|
|
An unencrypted device that will temporarily be mounted in stage-1.
|
|
Must contain the current salt to create the challenge for this LUKS device.
|
|
'';
|
|
};
|
|
|
|
fsType = mkOption {
|
|
default = "vfat";
|
|
type = types.str;
|
|
description = "The filesystem of the unencrypted device.";
|
|
};
|
|
|
|
path = mkOption {
|
|
default = "/crypt-storage/default";
|
|
type = types.str;
|
|
description = ''
|
|
Absolute path of the salt on the unencrypted device with
|
|
that device's root directory as "/".
|
|
'';
|
|
};
|
|
};
|
|
};
|
|
});
|
|
};
|
|
|
|
preOpenCommands = mkOption {
|
|
type = types.lines;
|
|
default = "";
|
|
example = ''
|
|
mkdir -p /tmp/persistent
|
|
mount -t zfs rpool/safe/persistent /tmp/persistent
|
|
'';
|
|
description = ''
|
|
Commands that should be run right before we try to mount our LUKS device.
|
|
This can be useful, if the keys needed to open the drive is on another partion.
|
|
'';
|
|
};
|
|
|
|
postOpenCommands = mkOption {
|
|
type = types.lines;
|
|
default = "";
|
|
example = ''
|
|
umount /tmp/persistent
|
|
'';
|
|
description = ''
|
|
Commands that should be run right after we have mounted our LUKS device.
|
|
'';
|
|
};
|
|
};
|
|
}));
|
|
};
|
|
|
|
boot.initrd.luks.gpgSupport = mkOption {
|
|
default = false;
|
|
type = types.bool;
|
|
description = ''
|
|
Enables support for authenticating with a GPG encrypted password.
|
|
'';
|
|
};
|
|
|
|
boot.initrd.luks.yubikeySupport = mkOption {
|
|
default = false;
|
|
type = types.bool;
|
|
description = ''
|
|
Enables support for authenticating with a YubiKey on LUKS devices.
|
|
See the NixOS wiki for information on how to properly setup a LUKS device
|
|
and a YubiKey to work with this feature.
|
|
'';
|
|
};
|
|
|
|
boot.initrd.luks.fido2Support = mkOption {
|
|
default = false;
|
|
type = types.bool;
|
|
description = ''
|
|
Enables support for authenticating with FIDO2 devices.
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
config = mkIf (luks.devices != {} || luks.forceLuksSupportInInitrd) {
|
|
|
|
assertions =
|
|
[ { assertion = !(luks.gpgSupport && luks.yubikeySupport);
|
|
message = "YubiKey and GPG Card may not be used at the same time.";
|
|
}
|
|
|
|
{ assertion = !(luks.gpgSupport && luks.fido2Support);
|
|
message = "FIDO2 and GPG Card may not be used at the same time.";
|
|
}
|
|
|
|
{ assertion = !(luks.fido2Support && luks.yubikeySupport);
|
|
message = "FIDO2 and YubiKey may not be used at the same time.";
|
|
}
|
|
|
|
{ assertion = any (dev: dev.bypassWorkqueues) (attrValues luks.devices)
|
|
-> versionAtLeast kernelPackages.kernel.version "5.9";
|
|
message = "boot.initrd.luks.devices.<name>.bypassWorkqueues is not supported for kernels older than 5.9";
|
|
}
|
|
];
|
|
|
|
# actually, sbp2 driver is the one enabling the DMA attack, but this needs to be tested
|
|
boot.blacklistedKernelModules = optionals luks.mitigateDMAAttacks
|
|
["firewire_ohci" "firewire_core" "firewire_sbp2"];
|
|
|
|
# Some modules that may be needed for mounting anything ciphered
|
|
boot.initrd.availableKernelModules = [ "dm_mod" "dm_crypt" "cryptd" "input_leds" ]
|
|
++ luks.cryptoModules
|
|
# workaround until https://marc.info/?l=linux-crypto-vger&m=148783562211457&w=4 is merged
|
|
# remove once 'modprobe --show-depends xts' shows ecb as a dependency
|
|
++ (if builtins.elem "xts" luks.cryptoModules then ["ecb"] else []);
|
|
|
|
# copy the cryptsetup binary and it's dependencies
|
|
boot.initrd.extraUtilsCommands = ''
|
|
copy_bin_and_libs ${pkgs.cryptsetup}/bin/cryptsetup
|
|
copy_bin_and_libs ${askPass}/bin/cryptsetup-askpass
|
|
sed -i s,/bin/sh,$out/bin/sh, $out/bin/cryptsetup-askpass
|
|
|
|
${optionalString luks.yubikeySupport ''
|
|
copy_bin_and_libs ${pkgs.yubikey-personalization}/bin/ykchalresp
|
|
copy_bin_and_libs ${pkgs.yubikey-personalization}/bin/ykinfo
|
|
copy_bin_and_libs ${pkgs.openssl.bin}/bin/openssl
|
|
|
|
cc -O3 -I${pkgs.openssl.dev}/include -L${lib.getLib pkgs.openssl}/lib ${./pbkdf2-sha512.c} -o pbkdf2-sha512 -lcrypto
|
|
strip -s pbkdf2-sha512
|
|
copy_bin_and_libs pbkdf2-sha512
|
|
|
|
mkdir -p $out/etc/ssl
|
|
cp -pdv ${pkgs.openssl.out}/etc/ssl/openssl.cnf $out/etc/ssl
|
|
|
|
cat > $out/bin/openssl-wrap <<EOF
|
|
#!$out/bin/sh
|
|
export OPENSSL_CONF=$out/etc/ssl/openssl.cnf
|
|
$out/bin/openssl "\$@"
|
|
EOF
|
|
chmod +x $out/bin/openssl-wrap
|
|
''}
|
|
|
|
${optionalString luks.fido2Support ''
|
|
copy_bin_and_libs ${pkgs.fido2luks}/bin/fido2luks
|
|
''}
|
|
|
|
|
|
${optionalString luks.gpgSupport ''
|
|
copy_bin_and_libs ${pkgs.gnupg}/bin/gpg
|
|
copy_bin_and_libs ${pkgs.gnupg}/bin/gpg-agent
|
|
copy_bin_and_libs ${pkgs.gnupg}/libexec/scdaemon
|
|
|
|
${concatMapStringsSep "\n" (x:
|
|
if x.gpgCard != null then
|
|
''
|
|
mkdir -p $out/secrets/gpg-keys/${x.device}
|
|
cp -a ${x.gpgCard.encryptedPass} $out/secrets/gpg-keys/${x.device}/cryptkey.gpg
|
|
cp -a ${x.gpgCard.publicKey} $out/secrets/gpg-keys/${x.device}/pubkey.asc
|
|
''
|
|
else ""
|
|
) (attrValues luks.devices)
|
|
}
|
|
''}
|
|
'';
|
|
|
|
boot.initrd.extraUtilsCommandsTest = ''
|
|
$out/bin/cryptsetup --version
|
|
${optionalString luks.yubikeySupport ''
|
|
$out/bin/ykchalresp -V
|
|
$out/bin/ykinfo -V
|
|
$out/bin/openssl-wrap version
|
|
''}
|
|
${optionalString luks.gpgSupport ''
|
|
$out/bin/gpg --version
|
|
$out/bin/gpg-agent --version
|
|
$out/bin/scdaemon --version
|
|
''}
|
|
${optionalString luks.fido2Support ''
|
|
$out/bin/fido2luks --version
|
|
''}
|
|
'';
|
|
|
|
boot.initrd.preFailCommands = postCommands;
|
|
boot.initrd.preLVMCommands = commonFunctions + preCommands + concatStrings (mapAttrsToList openCommand preLVM) + postCommands;
|
|
boot.initrd.postDeviceCommands = commonFunctions + preCommands + concatStrings (mapAttrsToList openCommand postLVM) + postCommands;
|
|
|
|
environment.systemPackages = [ pkgs.cryptsetup ];
|
|
};
|
|
}
|