dropbear: add sftp-server to rdepends

Related: SYS#6403
Change-Id: I4044a19d172c9617eecabd083cfbc04832591e6a

recipes-core/dropbear/dropbear.inc

@@ -29,7 +29,9 @@ PAM_PLUGINS = "libpam-runtime \
 	pam-plugin-permit \
 	pam-plugin-unix \
 	"
-RDEPENDS_${PN} += "${@bb.utils.contains('DISTRO_FEATURES', 'pam', '${PAM_PLUGINS}', '', d)}"
+RDEPENDS_${PN} += "${@bb.utils.contains('DISTRO_FEATURES', 'pam', '${PAM_PLUGINS}', '', d)} \
+                   sftp-server \
+                   "
 
 inherit autotools update-rc.d systemd
 

recipes-extra/sftp-server/sftp-server_9.3p1.bb

@@ -0,0 +1,34 @@
+# Package OpenSSH's sftp server, so the openssh client finds it and doesn't
+# need to be run with a flag to use the legacy SCP protocol (SYS#6403)
+SUMMARY = "OpenSSH's sftp-server"
+DESCRIPTION = "OpenSSH's sftp-server, to be used with dropbear"
+HOMEPAGE = "http://www.openssh.com/"
+SECTION = "console/network"
+LICENSE = "BSD"
+LIC_FILES_CHKSUM = "file://LICENCE;md5=072979064e691d342002f43cd89c0394"
+DEPENDS = ""
+# SRC_URI = "https://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-${PV}.tar.gz"
+# Official mirror is down as of writing. The github mirror is mentioned here:
+# https://www.openssh.com/portable.html
+GIT_TAG = "V_9_3_P1"
+SRC_URI = "https://github.com/openssh/openssh-portable/archive/refs/tags/${GIT_TAG}.tar.gz"
+
+SRC_URI[md5sum] = "68f7f08269c442e2728656cd97506478"
+SRC_URI[sha256sum] = "c5e541b59bdad8950a8c999fe18ca1ad39f6132b042cd85fb29e788ca9f9ce47"
+
+inherit autotools
+
+EXTRA_OECONF += "--without-openssl --without-zlib"
+
+S = "${WORKDIR}/openssh-portable-${GIT_TAG}"
+
+do_compile() {
+    oe_runmake sftp-server
+}
+
+do_install() {
+    install -Dm755 "${B}"/sftp-server \
+        -t "${D}"/usr/libexec/
+}
+
+FILES_${PN} = "/usr/lib/sftp-server"