SUMMARY = "A lightweight SSH and SCP implementation"
HOMEPAGE = "http://matt.ucc.asn.au/dropbear/dropbear.html"
DESCRIPTION = "Dropbear is a relatively small SSH server and client. It runs on a variety of POSIX-based platforms. Dropbear is open source software, distributed under a MIT-style license. Dropbear is particularly useful for "embedded"-type Linux (or other Unix) systems, such as wireless routers."
SECTION = "console/network"

# some files are from other projects and have others license terms:
#   public domain, OpenSSH 3.5p1, OpenSSH3.6.1p2, PuTTY
LICENSE = "MIT & BSD-3-Clause & BSD-2-Clause & PD"
LIC_FILES_CHKSUM = "file://LICENSE;md5=25cf44512b7bc8966a48b6b1a9b7605f"

DEPENDS = "zlib virtual/crypt"
RPROVIDES:${PN} = "ssh sshd"
RCONFLICTS:${PN} = "openssh-sshd openssh"

DEPENDS += "${@bb.utils.contains('DISTRO_FEATURES', 'pam', 'libpam', '', d)}"

SRC_URI = "http://matt.ucc.asn.au/dropbear/releases/dropbear-${PV}.tar.bz2 \
           file://0001-urandom-xauth-changes-to-options.h.patch \
           file://init \
           file://dropbearkey.service \
           file://dropbear@.service \
           file://dropbear.socket \
           file://dropbear.default \
           ${@bb.utils.contains('DISTRO_FEATURES', 'pam', '${PAM_SRC_URI}', '', d)} \
           ${@bb.utils.contains('PACKAGECONFIG', 'disable-weak-ciphers', 'file://dropbear-disable-weak-ciphers.patch', '', d)} \
           file://0007-Fix-X11-build-failure-use-DROPBEAR_PRIO_LOWDELAY.patch"

SRC_URI[sha256sum] = "3a038d2bbc02bf28bbdd20c012091f741a3ec5cbe460691811d714876aad75d1"

PAM_SRC_URI = "file://0005-dropbear-enable-pam.patch \
               file://0006-dropbear-configuration-file.patch \
               file://dropbear"

PAM_PLUGINS = "libpam-runtime \
	pam-plugin-deny \
	pam-plugin-permit \
	pam-plugin-unix \
	"
RDEPENDS:${PN} += "${@bb.utils.contains('DISTRO_FEATURES', 'pam', '${PAM_PLUGINS}', '', d)}"

inherit autotools update-rc.d systemd

CVE_PRODUCT = "dropbear_ssh"

INITSCRIPT_NAME = "dropbear"
INITSCRIPT_PARAMS = "defaults 10"

SYSTEMD_SERVICE:${PN} = "dropbear.socket"

SBINCOMMANDS = "dropbear dropbearkey dropbearconvert"
BINCOMMANDS = "dbclient ssh scp"
EXTRA_OEMAKE = 'MULTI=1 SCPPROGRESS=1 PROGRAMS="${SBINCOMMANDS} ${BINCOMMANDS}"'

PACKAGECONFIG ?= "disable-weak-ciphers"
PACKAGECONFIG[system-libtom] = "--disable-bundled-libtom,--enable-bundled-libtom,libtommath libtomcrypt"
PACKAGECONFIG[disable-weak-ciphers] = ""
PACKAGECONFIG[enable-x11-forwarding] = ""

EXTRA_OECONF += "\
 ${@bb.utils.contains('DISTRO_FEATURES', 'pam', '--enable-pam', '--disable-pam', d)}"

# This option appends to CFLAGS and LDFLAGS from OE
# This is causing [textrel] QA warning
EXTRA_OECONF += "--disable-harden"

# musl does not implement wtmp/logwtmp APIs
EXTRA_OECONF:append:libc-musl = " --disable-wtmp --disable-lastlog"

do_configure:append() {
	echo "/* Dropbear features */" > ${B}/localoptions.h
	if ${@bb.utils.contains('PACKAGECONFIG', 'enable-x11-forwarding', 'true', 'false', d)}; then
		echo "#define DROPBEAR_X11FWD 1" >> ${B}/localoptions.h
	fi
}

do_install() {
	install -d ${D}${sysconfdir} \
		${D}${sysconfdir}/init.d \
		${D}${sysconfdir}/default \
		${D}${sysconfdir}/dropbear \
		${D}${bindir} \
		${D}${sbindir} \
		${D}${localstatedir}

	install -m 0644 ${WORKDIR}/dropbear.default ${D}${sysconfdir}/default/dropbear

	install -m 0755 dropbearmulti ${D}${sbindir}/

	for i in ${BINCOMMANDS}
	do
		# ssh and scp symlinks are created by update-alternatives
		if [ $i = ssh ] || [ $i = scp ]; then continue; fi
		ln -s ${sbindir}/dropbearmulti ${D}${bindir}/$i
	done
	for i in ${SBINCOMMANDS}
	do
		ln -s ./dropbearmulti ${D}${sbindir}/$i
	done
	sed -e 's,/etc,${sysconfdir},g' \
		-e 's,/usr/sbin,${sbindir},g' \
		-e 's,/var,${localstatedir},g' \
		-e 's,/usr/bin,${bindir},g' \
		-e 's,/usr,${prefix},g' ${WORKDIR}/init > ${D}${sysconfdir}/init.d/dropbear
	chmod 755 ${D}${sysconfdir}/init.d/dropbear
	if [ "${@bb.utils.filter('DISTRO_FEATURES', 'pam', d)}" ]; then
		install -d ${D}${sysconfdir}/pam.d
		install -m 0644 ${WORKDIR}/dropbear  ${D}${sysconfdir}/pam.d/
	fi

	# deal with systemd unit files
	install -d ${D}${systemd_system_unitdir}
	install -m 0644 ${WORKDIR}/dropbearkey.service ${D}${systemd_system_unitdir}
	install -m 0644 ${WORKDIR}/dropbear@.service ${D}${systemd_system_unitdir}
	install -m 0644 ${WORKDIR}/dropbear.socket ${D}${systemd_system_unitdir}
	sed -i -e 's,@BASE_BINDIR@,${base_bindir},g' \
		-e 's,@BINDIR@,${bindir},g' \
		-e 's,@SBINDIR@,${sbindir},g' \
		${D}${systemd_system_unitdir}/dropbear.socket ${D}${systemd_system_unitdir}/*.service
}

inherit update-alternatives

ALTERNATIVE_PRIORITY = "20"
ALTERNATIVE:${PN} = "${@bb.utils.filter('BINCOMMANDS', 'scp ssh', d)}"

ALTERNATIVE_TARGET = "${sbindir}/dropbearmulti"

pkg_postrm:${PN} () {
  if [ -f "${sysconfdir}/dropbear/dropbear_rsa_host_key" ]; then
        rm ${sysconfdir}/dropbear/dropbear_rsa_host_key
  fi
  if [ -f "${sysconfdir}/dropbear/dropbear_dss_host_key" ]; then
        rm ${sysconfdir}/dropbear/dropbear_dss_host_key
  fi
}

CONFFILES:${PN} = "${sysconfdir}/default/dropbear"

FILES:${PN} += "${bindir}"