net-misc/dropbear: fix client-server tests

Use sys-libs/nss_wrapper to fake home dir for dropbear server.

Signed-off-by: Viorel Munteanu <ceamac@gentoo.org>

net-misc/dropbear/dropbear-2024.84.ebuild

@@ -43,6 +43,7 @@ DEPEND="
 RDEPEND+=" pam? ( >=sys-auth/pambase-20080219.1 )"
 BDEPEND="
 	test? (
+		sys-libs/nss_wrapper
 		$(python_gen_any_dep '
 			dev-python/attrs[${PYTHON_USEDEP}]
 			dev-python/iniconfig[${PYTHON_USEDEP}]
@@ -63,6 +64,7 @@ PATCHES=(
 	"${FILESDIR}"/${PN}-2024.84-dbscp.patch
 	"${FILESDIR}"/${PN}-2022.82-tests.patch
 	"${FILESDIR}"/${PN}-2024.84-non-interactive-tests.patch
+	"${FILESDIR}"/${PN}-2024.84-fix-channels-tests.patch
 )
 
 set_options() {
@@ -106,7 +108,7 @@ src_prepare() {
 	restore_config localoptions.h
 
 	# remove tests that fail
-	rm test/test_aslr.py test/test_channels.py || die
+	rm test/test_aslr.py || die
 
 	# dropbearconver is not build with USE minimal
 	if use minimal; then

net-misc/dropbear/files/dropbear-2024.84-fix-channels-tests.patch

@@ -0,0 +1,36 @@
+dbclient obeys $HOME, but dropbear (the server) resolves HOME using getpwnam.
+Use sys-libs/nss_wrapper to fake it during tests.
+
+--- a/test/Makefile.in
++++ b/test/Makefile.in
+@@ -4,7 +4,15 @@ SHELL=bash
+ 
+ all: test
+ 
++uid:=$(shell id -u)
++gid:=$(shell id -g)
+ test: fakekey
++	mkdir -p ~/.ssh
++	../dropbearkey -t ecdsa -f ~/.ssh/id_dropbear
++	../dropbearkey -y -f ~/.ssh/id_dropbear | grep ^ecdsa > ~/.ssh/authorized_keys
++	echo "$(LOGNAME)::$(uid):$(gid):$(USER):$(HOME):/bin/bash" >> ~/passwd
++	echo "$(LOGNAME)::$(gid):" >> ~/group
++	chmod 0700 ~ ~/.ssh ~/.ssh/authorized_keys ~/passwd ~/group
+ 	pytest --hostkey=fakekey --dbclient=../dbclient --dropbear=../dropbear $(srcdir)
+ 
+ one: fakekey
+--- a/test/test_dropbear.py
++++ b/test/test_dropbear.py
+@@ -27,7 +27,11 @@ def dropbear(request):
+ 		]
+ 	print("subprocess args: ", args)
+ 
+-	p = subprocess.Popen(args, stderr=subprocess.PIPE, text=True)
++	env = os.environ
++	env['LD_PRELOAD'] = 'libnss_wrapper.so'
++	env['NSS_WRAPPER_PASSWD'] = env['HOME'] + '/passwd'
++	env['NSS_WRAPPER_GROUP'] = env['HOME'] + '/group'
++	p = subprocess.Popen(args, stderr=subprocess.PIPE, text=True, env=env)
+ 	# Wait until it has started listening
+ 	for l in p.stderr:
+ 		if "Not backgrounding" in l: