gnutls: add ptest support

Add gnutls unit-tests into ptest. Only self-contained
tests (no external file system dependencies) are included.

Some tests have been put in a disallow list in the run-ptest;
these tests either require additional files (certificates) or
environment setup prior to being run, via wrapper shell script.
As autotools packages are built out-of-tree, it is cumbersome
to add additional files. With regards to tests requiring wrapper
scripts, it is possible to add logic to run these tests under
run-ptests but that will require more effort to maintain, hence
skipped.

Verified via:
$ runqemu qemux86-64 kvm nographic serial qemuparams='-m 4096 -smp 32'
root@qemux86-64:~# ptest-runner gnutls
START: ptest-runner
BEGIN: /usr/lib64/gnutls/ptest
PASS: aead-cipher-vec
PASS: alerts
PASS: anti_replay
...
gnutls test summary:
--------------------
total: 375
pass : 364
fail : 0
skip : 11

DURATION: 184
END: /usr/lib64/gnutls/ptest
2023-02-01T13:55
STOP: ptest-runner
TOTAL: 1 FAIL: 0

(From OE-Core rev: 6061df3084b991ba4a54a3dca5dadda97e2364ac)

Signed-off-by: Ravineet Singh <ravineet.a.singh@est.tech>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 150 insertions, 0 deletions

diff --git a/meta/recipes-support/gnutls/gnutls/Add-ptest-support.patch b/meta/recipes-support/gnutls/gnutls/Add-ptest-support.patch
new file mode 100644
index 0000000000..8ad6ba5ad5
--- /dev/null
+++ b/meta/recipes-support/gnutls/gnutls/Add-ptest-support.patch
@@ -0,0 +1,60 @@
+From 74080376904713a8e6cceefbc25c81512796bf0c Mon Sep 17 00:00:00 2001
+From: Ravineet Singh <ravineet.a.singh@est.tech>
+Date: Tue, 10 Jan 2023 16:11:10 +0100
+Subject: [PATCH] gnutls: add ptest support
+
+Upstream-Status: Inappropriate [embedded specific]
+Signed-off-by: Ravineet Singh <ravineet.a.singh@est.tech>
+---
+ Makefile.am       | 3 +++
+ configure.ac      | 2 ++
+ tests/Makefile.am | 6 ++++++
+ 3 files changed, 11 insertions(+)
+
+diff --git a/Makefile.am b/Makefile.am
+index 843193f9f..816b09fec 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -191,6 +191,9 @@ dist-hook:
+        mv ChangeLog $(distdir)
+        touch -c $(distdir)/doc/*.html $(distdir)/doc/*.pdf $(distdir)/doc/*.info
+ 
++install-ptest:
++        $(MAKE) -C tests DESTDIR=$(DESTDIR)/tests $@
++
+ .PHONY: abi-check abi-dump-versioned abi-dump-latest pic-check symbol-check local-code-coverage-output files-update AUTHORS
+ 
+ include $(top_srcdir)/cligen/cligen.mk
+diff --git a/configure.ac b/configure.ac
+index baff1c007..f9f596abf 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -1150,6 +1150,8 @@ AC_SUBST(LIBGNUTLS_CFLAGS)
+ 
+ AM_CONDITIONAL(NEEDS_LIBRT, test "$gnutls_needs_librt" = "yes")
+ 
++AM_EXTRA_RECURSIVE_TARGETS([buildtest-TESTS])
++
+ AC_DEFINE([GNUTLS_INTERNAL_BUILD], 1, [We allow temporarily usage of deprecated functions - until they are removed.])
+ 
+ hw_features=
+diff --git a/tests/Makefile.am b/tests/Makefile.am
+index 573e911a0..e8a26f8b9 100644
+--- a/tests/Makefile.am
++++ b/tests/Makefile.am
+@@ -644,6 +644,12 @@ SH_LOG_COMPILER = $(SHELL)
+ AM_VALGRINDFLAGS = --suppressions=$(srcdir)/suppressions.valgrind
+ LOG_COMPILER = $(LOG_VALGRIND)
+ 
++install-ptest: $(check_PROGRAMS)
++       @$(INSTALL) -d $(DESTDIR)
++       @for file in $^; do \
++               $(INSTALL_PROGRAM) $$file $(DESTDIR) ; \
++       done
++
+ distclean-local:
+        rm -rf softhsm-*.db softhsm-*.config *.tmp tmp-* x509-crt-list-import-url.config.db port.lock.d
+ 
+-- 
+2.31.1
+
diff --git a/meta/recipes-support/gnutls/gnutls/run-ptest b/meta/recipes-support/gnutls/gnutls/run-ptest
new file mode 100644
index 0000000000..84948f487d
--- /dev/null
+++ b/meta/recipes-support/gnutls/gnutls/run-ptest
@@ -0,0 +1,90 @@
+#!/bin/sh
+
+rjob() {
+    local job=$1
+    local log=$2
+
+    # TODO: Output will be garbled
+    ./${job} >> ${log} 2>&1
+
+    ret=$?
+    case $ret in
+    0)
+        echo "PASS: $t" >> ${log}
+        echo "PASS: $t"
+        ;;
+    77)
+        echo "SKIP: $t" >> ${log}
+        echo "SKIP: $t"
+        ;;
+    *)
+        echo "FAIL: $t" >> ${log}
+        echo "FAIL: $t"
+        ;;
+    esac
+}
+
+is_disallowed() {
+    local key=$1
+    $(echo ${test_disallowlist} | grep -w -q ${key})
+    return $?
+}
+
+# TODO
+# This list should probably be in a external file
+# Testcases defined here either take very long time (dtls-stress)
+# or are dependent on local files (certs, etc) in local file system
+# currently not exported to target.
+
+test_disallowlist=""
+test_disallowlist="${test_disallowlist} dtls-stress"
+test_disallowlist="${test_disallowlist} handshake-large-cert"
+test_disallowlist="${test_disallowlist} id-on-xmppAddr"
+test_disallowlist="${test_disallowlist} mini-x509-cas"
+test_disallowlist="${test_disallowlist} pkcs12_simple"
+test_disallowlist="${test_disallowlist} protocol-set-allowlist"
+test_disallowlist="${test_disallowlist} psk-file"
+test_disallowlist="${test_disallowlist} rawpk-api"
+test_disallowlist="${test_disallowlist} set_pkcs12_cred"
+test_disallowlist="${test_disallowlist} system-override-curves-allowlist"
+test_disallowlist="${test_disallowlist} system-override-hash"
+test_disallowlist="${test_disallowlist} system-override-sig"
+test_disallowlist="${test_disallowlist} system-override-sig-tls"
+test_disallowlist="${test_disallowlist} system-prio-file"
+test_disallowlist="${test_disallowlist} x509cert-tl"
+
+LOG=${PWD}/tests.log
+cd tests
+max_njobs=$(grep -c ^processor /proc/cpuinfo)
+njobs=0
+
+for t in *; do
+    [ -x $t ] || continue
+    [ -f $t ] || continue
+
+    is_disallowed ${t}
+    [ $? -eq 0 ] && continue
+
+    rjob ${t} ${LOG} &
+    one=1
+    njobs=$(expr ${njobs} + ${one})
+    if [ ${njobs} -eq ${max_njobs} ]; then
+        wait
+        njobs=0
+    fi
+done
+wait
+
+skipped=$(grep -c SKIP ${LOG})
+passed=$(grep -c PASS ${LOG})
+failed=$(grep -c FAIL ${LOG})
+total=$(expr ${passed} + ${failed} + ${skipped})
+
+echo
+echo "gnutls test summary:"
+echo "--------------------"
+echo "total: ${total}"
+echo "pass : ${passed}"
+echo "fail : ${failed}"
+echo "skip : ${skipped}"
+echo