1 files changed, 78 insertions, 0 deletions
diff --git a/certs/sample/gen-certs.sh b/certs/sample/gen-certs.sh
new file mode 100755
index 0000000..f0aa135
--- /dev/null
+++ b/certs/sample/gen-certs.sh
@@ -0,0 +1,78 @@
+#!/bin/sh
+# 
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without any warranty.
+
+ORG="/C=FR/ST=Brittany/L=Lorient/O=IoT.bzh"
+
+cat > extensions << EOC
+[root]
+basicConstraints=CA:TRUE
+keyUsage=keyCertSign
+subjectKeyIdentifier=hash
+authorityKeyIdentifier=keyid
+[derivate]
+basicConstraints=CA:TRUE
+keyUsage=keyCertSign,digitalSignature
+subjectKeyIdentifier=hash
+authorityKeyIdentifier=keyid
+EOC
+
+keyof() { echo -n "$1.key.pem"; }
+certof() { echo -n "$1.cert.pem"; }
+
+generate() {
+
+local s="$1" n="$2" cn="$3" sig="$4" 
+local key="$(keyof "$n")" cert="$(certof "$n")"
+
+if [ ! -f "$key" ]
+then
+	echo
+	echo "generation of the $n key"
+	openssl genpkey \
+		-algorithm RSA -pkeyopt rsa_keygen_bits:4096 \
+		-outform PEM \
+		-out "$key"
+fi
+
+if [ ! -f "$cert" -o "$key" -nt "$cert" ]
+then
+	echo
+	echo "generation of the $n certificate"
+	openssl req -new \
+			-key "$key" \
+			-subj "$ORG/CN=$cn" |
+	openssl x509 -req \
+			-days 3653 \
+			-sha256 \
+			-extfile extensions \
+			-trustout \
+			$sig \
+			-set_serial $s \
+			-setalias "$cn" \
+			-out "$cert"
+fi
+
+}
+
+genroot() {
+	local s="$1" n="$2" cn="$3"
+	generate "$s" "$n" "$cn" "-signkey $(keyof "$n") -extensions root"
+}
+
+derivate() {
+	local s="$1" n="$2" cn="$3" i="$4"
+	generate "$s" "$n" "$cn" "-CA $(certof "$i") -CAkey $(keyof "$i") -extensions derivate"
+}
+
+	
+genroot 1 root "Root certificate" 
+derivate 2 developer "Root developer" root
+derivate 3 platform "Root platform" root
+derivate 4 partner "Root partner" root
+derivate 5 public "Root public" root
+
+rm extensions