From cdec2e76b4b1af00e10ce3bb72ee74e33d52083b Mon Sep 17 00:00:00 2001
From: Guilhem Moulin <guilhem@fripost.org>
Date: Fri, 8 May 2015 17:14:13 +0200
Subject: Make the encrypted installation work with Jessie.

---
 include/partition.sh                               | 34 +++++++++++++++-------
 src/fripost-partman-udeb/base.sh                   | 14 +++++----
 .../finish-install.d/07fripost                     | 15 ++--------
 3 files changed, 35 insertions(+), 28 deletions(-)

diff --git a/include/partition.sh b/include/partition.sh
index 35f259a..02695f5 100755
--- a/include/partition.sh
+++ b/include/partition.sh
@@ -91,9 +91,11 @@ part_swap=
 part_system=
 # Create boot and system partitions
 for d in $device; do
-    p=$( fripost_mkpart $d boot 64M )
-    part_boot="${part_boot:+$part_boot }$p"
-
+    if [ $encrypt = true ]; then
+        # Don't use a separate partition for /boot if the disk is unencrypted
+        p=$( fripost_mkpart $d boot 256M )
+        part_boot="${part_boot:+$part_boot }$p"
+    fi
     p=$( fripost_mkpart $d swap 1G )                # FIXME
     part_swap="${part_swap:+$part_swap }$p"
     /sbin/parted -s $d align-check opt ${p#$d} \
@@ -111,10 +113,12 @@ done
 if [ ${raidLevel:-} ]; then
     [ -d /dev/md ] || mkdir /dev/md
 
-    devices="$part_boot"
-    part_boot=/dev/md/boot
-    fripost_mdadm_create "$part_boot" -f -R -l $raidLevel \
-        ${raidNumActiveDevices:+-n $raidNumActiveDevices} $devices
+    if [ "${part_boot:-}" ]; then
+        devices="$part_boot"
+        part_boot=/dev/md/boot
+        fripost_mdadm_create "$part_boot" -f -R -l $raidLevel \
+            ${raidNumActiveDevices:+-n $raidNumActiveDevices} $devices
+    fi
 
     devices="$part_swap"
     part_swap=/dev/md/swap
@@ -156,10 +160,18 @@ if [ $encrypt = true ]; then
         hash=sha256
     fi
     # Note: XTS requires the key size to be doubled.
-    fripost_encrypt $part_system system_crypt \
-        --cipher aes-xts-plain64 --key-size $(( $keysize * 2 )) --hash $hash \
-        --iter-time 5000 --use-random
-    part_system=/dev/mapper/system_crypt
+    fripost_encrypt $part_system luksRoot \
+        --cipher=aes-xts-plain64 --key-size=$(( $keysize * 2 )) --hash=$hash \
+        --iter-time=5000 --use-random
+    part_system=/dev/mapper/luksRoot
+
+    /lib/cryptsetup/scripts/decrypt_derived luksRoot \
+        | cryptsetup luksFormat $part_swap --cipher=aes-xts-plain64 --hash=$hash --key-file=-
+    /lib/cryptsetup/scripts/decrypt_derived luksRoot \
+        | cryptsetup luksOpen $part_swap luksSwap --key-file=-
+
+    fripost_crypttab_addentry luksSwap "$part_swap" luksRoot luks,keyscript=/lib/cryptsetup/scripts/decrypt_derived
+    part_swap=/dev/mapper/luksSwap
 fi
 
 
diff --git a/src/fripost-partman-udeb/base.sh b/src/fripost-partman-udeb/base.sh
index 23fcdeb..0155569 100644
--- a/src/fripost-partman-udeb/base.sh
+++ b/src/fripost-partman-udeb/base.sh
@@ -364,16 +364,14 @@ fripost_encrypt() {
     rm -f "$keyfile" # We are on a ramdisk, so it's good enough to unlink(2)
 
     # Add an entry to the crypttab
-    printf "%-15s %-41s %-15s %s\n" \
-        "$name" UUID=$(/bin/block-attr --uuid "$device") none luks \
-        >> /tmp/crypttab
+    fripost_crypttab_addentry "$name" "$device" none luks
 
     local m _
     [ -d /var/lib/fripost ] || mkdir /var/lib/fripost
     # The modules required to fire up dropbear and start cryptsetup in the ramdisk.
-    echo dm_crypt > /tmp/initramfs-modules
+    echo dm_crypt >> /var/lib/fripost/initrd-modules
     while read m _; do /sbin/modinfo -F filename "$m"; done < /proc/modules \
-        | sed -nr "s@^/lib/modules/`uname -r`/kernel/((arch/[^/]+/)?crypto|drivers/(ata|scsi))(/.*)?/([^/]+)\.ko\$@\5@p" \
+        | sed -nr "s@^/lib/modules/`uname -r`/kernel/((arch/[^/]+/)?crypto|drivers/(ata|scsi|net))(/.*)?/([^/]+)\.ko\$@\5@p" \
         >> /var/lib/fripost/initrd-modules
     /bin/apt-install busybox cryptsetup || true
 
@@ -381,6 +379,12 @@ fripost_encrypt() {
 }
 
 
+fripost_crypttab_addentry() {
+    local name="$1" uuid=$(/bin/block-attr --uuid "$2") keyfile="$3" options="$4"
+    printf "%-15s %-41s %-15s %s\n" "$name" "UUID=$uuid" "$keyfile" "$options" >>/tmp/crypttab
+}
+
+
 # Like ssh-keygen -lf, but for a file such as authorized_keys, which
 # may contain multiple keys.  Also, use the comment associated with the
 # key rather than the filename.
diff --git a/src/fripost-postinst-udeb/finish-install.d/07fripost b/src/fripost-postinst-udeb/finish-install.d/07fripost
index e583d5a..90df7b8 100755
--- a/src/fripost-postinst-udeb/finish-install.d/07fripost
+++ b/src/fripost-postinst-udeb/finish-install.d/07fripost
@@ -109,19 +109,10 @@ if [ "$encrypt" = true ]; then
         port=$(/target/usr/bin/od -An -N2 -i /dev/urandom)
         port=$(( $port % ($max + 1 - $min) + $min ))
     fi
-    # See dropbear(8) for the list of options. Failure to read a keyfile
-    # makes dropbear disable the corresponding algorithm (including
-    # key-based authentication), in our case DSS/DSA.
-    # XXX This is a dirty fix for bug #614981
+
+    # See dropbear(8) for the list of options.
     log "Changing dropbear's options; port $port"
-    sed -i "s@^\s*/sbin/dropbear\$@& -d '' -sgjk -p $port@" \
-        /target/usr/share/initramfs-tools/scripts/init-premount/dropbear
-
-    # Sadly /usr/lib/finish-install.d/10update-initramfs only updates
-    # the ramdisk if both cryptsetup *and* console-setup are installed.
-    # (Cf. #694156 and #696773.) So we perform the update manually here.
-    progress "Generating new initramfs image"
-    /bin/in-target /usr/sbin/update-initramfs -u -t
+    echo "PKGOPTION_dropbear_OPTION=\"-sgjk -p $port\"" >>/target/etc/initramfs-tools/initramfs.conf
 fi
 
 
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