---
modules.d/91crypt-loop/crypt-loop-lib.sh | 40 ++++++++++++++++++++++++++++++
modules.d/91crypt-loop/module-setup.sh | 15 +++++++++++
2 files changed, 55 insertions(+), 0 deletions(-)
create mode 100644 modules.d/91crypt-loop/crypt-loop-lib.sh
create mode 100644 modules.d/91crypt-loop/module-setup.sh
diff --git a/modules.d/91crypt-loop/crypt-loop-lib.sh
b/modules.d/91crypt-loop/crypt-loop-lib.sh
new file mode 100644
index 0000000..63a553c
--- /dev/null
+++ b/modules.d/91crypt-loop/crypt-loop-lib.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=4 sw=4 sts=0 et filetype=sh
+
+command -v ask_for_password >/dev/null || . /lib/dracut-crypt-lib.sh
+
+# loop_decrypt mnt_point keypath keydev device
+#
+# Decrypts symmetrically encrypted key to standard output.
+#
+# mnt_point - mount point where <keydev> is already mounted
+# keypath - LUKS encrypted loop file path relative to <mnt_point>
+# keydev - device on which key resides; only to display in prompt
+# device - device to be opened by cryptsetup; only to display in prompt
+loop_decrypt() {
+ local mntp="$1"
+ local keypath="$2"
+ local keydev="$3"
+ local device="$4"
+
+ local key="/dev/mapper/$(basename $mntp)"
+
+ if [ ! -b $key ]; then
+ info "Keyfile has .img suffix, treating it as LUKS-encrypted loop
keyfile container to unlock $device"
+
+ local loopdev=$(losetup -f "${mntp}/${keypath}" --show)
+ local opts="-d - luksOpen $loopdev $(basename $key)"
+
+ ask_for_password \
+ --cmd "cryptsetup $opts" \
+ --prompt "Password ($keypath on $keydev for $device)" \
+ --tty-echo-off
+
+ [ -b $key ] || die "Tried setting it up, but keyfile block device was
still not found!"
+ else
+ info "Existing keyfile found, re-using it for $device"
+ fi
+
+ cat $key
+}
diff --git a/modules.d/91crypt-loop/module-setup.sh
b/modules.d/91crypt-loop/module-setup.sh
new file mode 100644
index 0000000..2616b9b
--- /dev/null
+++ b/modules.d/91crypt-loop/module-setup.sh
@@ -0,0 +1,15 @@
+check() {
+ [ -n $hostonly ] || return 1
+ type -P losetup >/dev/null || return 1
+
+ return 255
+}
+
+depends() {
+ echo crypt
+}
+
+install() {
+ dracut_install losetup
+ inst "$moddir/crypt-loop-lib.sh" "/lib/dracut-crypt-loop-lib.sh"
+}
--
1.7.6
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