rng-tools: Revert "rng-tools: move to meta-oe"

This reverts commit d2b445384da3f3e6dab8577b6c56648b5244a788.

Revert this commit since:

 - some systems using oe-core master may still be using kernels from
   before 5.6 pulled in the rng-tools algorithm, and

 - some hardware platforms may not have a hardware random number generator
   and could therefore need to run rngd to avoid long boot-time initialization
   due to a depleted entropy pool.

Signed-off-by: Randy MacLeod <Randy.MacLeod@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

4 files changed, 144 insertions, 0 deletions

diff --git a/meta/recipes-support/rng-tools/rng-tools/default b/meta/recipes-support/rng-tools/rng-tools/default
new file mode 100644
index 0000000000..b9f8e03635
--- /dev/null
+++ b/meta/recipes-support/rng-tools/rng-tools/default
@@ -0,0 +1 @@
+EXTRA_ARGS="-r /dev/hwrng"
diff --git a/meta/recipes-support/rng-tools/rng-tools/init b/meta/recipes-support/rng-tools/rng-tools/init
new file mode 100644
index 0000000000..13f0ecd37c
--- /dev/null
+++ b/meta/recipes-support/rng-tools/rng-tools/init
@@ -0,0 +1,42 @@
+#!/bin/sh
+#
+# This is an init script for openembedded
+# Copy it to @SYSCONFDIR@/init.d/rng-tools and type
+# > update-rc.d rng-tools defaults 60
+#
+
+rngd=@SBINDIR@/rngd
+test -x "$rngd" || exit 1
+
+[ -r @SYSCONFDIR@/default/rng-tools ] && . "@SYSCONFDIR@/default/rng-tools"
+
+case "$1" in
+  start)
+    echo -n "Starting random number generator daemon"
+    start-stop-daemon -S -q -x $rngd -- $EXTRA_ARGS
+    echo "."
+    ;;
+  stop)
+    echo -n "Stopping random number generator daemon"
+    start-stop-daemon -K -q -n rngd
+    echo "."
+    ;;
+  reload|force-reload)
+    echo -n "Signalling rng daemon restart"
+    start-stop-daemon -K -q -s 1 -x $rngd
+    start-stop-daemon -K -q -s 1 -x $rngd
+    ;;
+  restart)
+    echo -n "Stopping random number generator daemon"
+    start-stop-daemon -K -q -n rngd
+    echo "."
+    echo -n "Starting random number generator daemon"
+    start-stop-daemon -S -q -x $rngd -- $EXTRA_ARGS
+    echo "."
+    ;;
+  *)
+    echo "Usage: @SYSCONFDIR@/init.d/rng-tools {start|stop|reload|restart|force-reload}"
+    exit 1
+esac
+
+exit 0
diff --git a/meta/recipes-support/rng-tools/rng-tools/rng-tools.service b/meta/recipes-support/rng-tools/rng-tools/rng-tools.service
new file mode 100644
index 0000000000..5ae2fba215
--- /dev/null
+++ b/meta/recipes-support/rng-tools/rng-tools/rng-tools.service
@@ -0,0 +1,32 @@
+[Unit]
+Description=Hardware RNG Entropy Gatherer Daemon
+DefaultDependencies=no
+Conflicts=shutdown.target
+Before=sysinit.target shutdown.target
+ConditionVirtualization=!container
+
+[Service]
+EnvironmentFile=-@SYSCONFDIR@/default/rng-tools
+ExecStart=@SBINDIR@/rngd -f $EXTRA_ARGS
+CapabilityBoundingSet=CAP_SYS_ADMIN
+IPAddressDeny=any
+LockPersonality=yes
+MemoryDenyWriteExecute=yes
+NoNewPrivileges=yes
+PrivateTmp=yes
+ProtectControlGroups=yes
+ProtectHome=yes
+ProtectHostname=yes
+ProtectKernelModules=yes
+ProtectKernelLogs=yes
+ProtectSystem=strict
+RestrictAddressFamilies=AF_UNIX
+RestrictNamespaces=yes
+RestrictRealtime=yes
+RestrictSUIDSGID=yes
+SystemCallArchitectures=native
+SystemCallErrorNumber=EPERM
+SystemCallFilter=@system-service
+
+[Install]
+WantedBy=sysinit.target
diff --git a/meta/recipes-support/rng-tools/rng-tools_6.16.bb b/meta/recipes-support/rng-tools/rng-tools_6.16.bb
new file mode 100644
index 0000000000..f0aa3ff93f
--- /dev/null
+++ b/meta/recipes-support/rng-tools/rng-tools_6.16.bb
@@ -0,0 +1,69 @@
+SUMMARY = "Random number generator daemon"
+DESCRIPTION = "Check and feed random data from hardware device to kernel"
+HOMEPAGE = "https://github.com/nhorman/rng-tools"
+BUGTRACKER = "https://github.com/nhorman/rng-tools/issues"
+LICENSE = "GPL-2.0-only"
+LIC_FILES_CHKSUM = "file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263"
+DEPENDS = "openssl libcap"
+
+SRC_URI = "git://github.com/nhorman/rng-tools.git;branch=master;protocol=https \
+           file://init \
+           file://default \
+           file://rng-tools.service \
+           "
+SRCREV = "e061c313b95890eb5fa0ada0cd6eec619dafdfe2"
+
+S = "${WORKDIR}/git"
+
+inherit autotools update-rc.d systemd pkgconfig
+
+EXTRA_OECONF = "--without-rtlsdr"
+
+PACKAGECONFIG ??= "libjitterentropy"
+PACKAGECONFIG:libc-musl = "libargp libjitterentropy"
+
+PACKAGECONFIG[libargp] = "--with-libargp,--without-libargp,argp-standalone,"
+PACKAGECONFIG[libjitterentropy] = "--enable-jitterentropy,--disable-jitterentropy,libjitterentropy"
+PACKAGECONFIG[libp11] = "--with-pkcs11,--without-pkcs11,libp11 openssl"
+PACKAGECONFIG[nistbeacon] = "--with-nistbeacon,--without-nistbeacon,curl libxml2"
+PACKAGECONFIG[qrypt] = "--with-qrypt,--without-qrypt,curl"
+
+INITSCRIPT_PACKAGES = "${PN}-service"
+INITSCRIPT_NAME:${PN}-service = "rng-tools"
+INITSCRIPT_PARAMS:${PN}-service = "start 03 2 3 4 5 . stop 30 0 6 1 ."
+
+SYSTEMD_PACKAGES = "${PN}-service"
+SYSTEMD_SERVICE:${PN}-service = "rng-tools.service"
+
+CFLAGS += " -DJENT_CONF_ENABLE_INTERNAL_TIMER "
+
+PACKAGES =+ "${PN}-service"
+
+FILES:${PN}-service += " \
+    ${sysconfdir}/init.d/rng-tools \
+    ${sysconfdir}/default/rng-tools \
+"
+
+# Refer autogen.sh in rng-tools
+do_configure:prepend() {
+    cp ${S}/README.md ${S}/README
+}
+
+do_install:append() {
+    install -Dm 0644 ${WORKDIR}/default ${D}${sysconfdir}/default/rng-tools
+    install -Dm 0755 ${WORKDIR}/init ${D}${sysconfdir}/init.d/rng-tools
+    install -Dm 0644 ${WORKDIR}/rng-tools.service \
+                     ${D}${systemd_system_unitdir}/rng-tools.service
+    sed -i \
+        -e 's,@SYSCONFDIR@,${sysconfdir},g' \
+        -e 's,@SBINDIR@,${sbindir},g' \
+        ${D}${sysconfdir}/init.d/rng-tools \
+        ${D}${systemd_system_unitdir}/rng-tools.service
+
+    if [ "${@bb.utils.contains('PACKAGECONFIG', 'nistbeacon', 'yes', 'no', d)}" = "yes" ]; then
+        sed -i \
+            -e '/^IPAddressDeny=any/d' \
+            -e '/^RestrictAddressFamilies=/ s/$/ AF_INET AF_INET6/' \
+            ${D}${systemd_system_unitdir}/rng-tools.service
+    fi
+}