From 2075d987ce39e9934a8ce368935a22cb4ae5dc7e Mon Sep 17 00:00:00 2001
From: Elms <jeff@wolfssl.com>
Date: Tue, 23 Feb 2021 10:06:04 -0800
Subject: [PATCH] README: Add swtpm build instructions and links

QEMU uses swtpm over unix socket, but it is currently not packaged so
is built from source.
---
 README.md              | 18 +++++++++++++++++-
 scripts/swtpm_sim.test |  1 +
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index f472f36..da17ffa 100644
--- a/README.md
+++ b/README.md
@@ -222,7 +222,23 @@ sudo adduser yourusername tss
 
 This demonstrates using wolfTPM in QEMU to communicate using the linux
 kernel device "/dev/tpmX". You will need to install or build
-[swtpm](https://github.com/stefanberger/swtpm).
+[swtpm](https://github.com/stefanberger/swtpm). Below are a short
+method to build. You may need to consult the instructions for
+[libtpms](https://github.com/stefanberger/libtpms/wiki#compile-and-install-on-linux)
+and
+[swtpm](https://github.com/stefanberger/swtpm/wiki#compile-and-install-on-linux)
+
+```
+PREFIX=$PWD/inst
+git clone git@github.com:stefanberger/libtpms.git
+cd libtpms/
+./autogen.sh --with-openssl --with-tpm2 --prefix=$PREFIX && make install
+cd ..
+git clone git@github.com:stefanberger/swtpm.git
+cd swtpm
+PKG_CONFIG_PATH=$PREFIX/lib/pkgconfig/ ./autogen.sh --with-openssl --with-tpm2 --prefix=$PREFIX && make install
+cd ..
+```
 
 You can setup a basic linux installation. Other installation bases can
 be used. This step will take some time to install the base linux
diff --git a/scripts/swtpm_sim.test b/scripts/swtpm_sim.test
index 4d4e556..3ee5a1c 100755
--- a/scripts/swtpm_sim.test
+++ b/scripts/swtpm_sim.test
@@ -11,6 +11,7 @@ TOP_DIR=$(realpath $(dirname $0)/..)
 
 die() {
     echo $* >&2
+    ps $swtpm_pid > /dev/null && kill $swtpm_pid
     exit 1
 }