add support for signing with ssh-keygen

TODO: add tests

3 files changed, 61 insertions, 0 deletions

diff --git a/cmd/sigsum/test/keys/ssh b/cmd/sigsum/test/keys/ssh
new file mode 100644
index 0000000..2bbd974
--- /dev/null
+++ b/cmd/sigsum/test/keys/ssh
@@ -0,0 +1,7 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
+QyNTUxOQAAACC/0wdPezO/W1upVq2RduQ/ieEHn0r6LgwkXEINfJ52fQAAAJCRqZKpkamS
+qQAAAAtzc2gtZWQyNTUxOQAAACC/0wdPezO/W1upVq2RduQ/ieEHn0r6LgwkXEINfJ52fQ
+AAAEClIbTUqSPBTrfD9MCpwTF1Fwit4NXU2ci3R57uq4Aic7/TB097M79bW6lWrZF25D+J
+4QefSvouDCRcQg18nnZ9AAAACmxpbnVzQGJlc2sBAgM=
+-----END OPENSSH PRIVATE KEY-----
diff --git a/cmd/sigsum/test/keys/ssh.pub b/cmd/sigsum/test/keys/ssh.pub
new file mode 100644
index 0000000..14588ac
--- /dev/null
+++ b/cmd/sigsum/test/keys/ssh.pub
@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIL/TB097M79bW6lWrZF25D+J4QefSvouDCRcQg18nnZ9 linus@besk
diff --git a/cmd/sigsum/test/ssh.sh b/cmd/sigsum/test/ssh.sh
new file mode 100755
index 0000000..56cae70
--- /dev/null
+++ b/cmd/sigsum/test/ssh.sh
@@ -0,0 +1,53 @@
+#!/bin/bash
+
+set -eu
+trap cleanup EXIT
+
+priv=keys/ssh
+pub=keys/ssh.pub
+domain_hint=_sigsum_v0.ssh.test.sigsum.org
+msg=msg-$(date +%s)
+num_msg=3
+
+function cleanup() {
+	set +e
+
+	rm -f sigsum
+	for i in $(seq 1 $num_msg); do
+		rm -f $msg-$i{,.trunnel,.sig}
+	done
+
+	exit
+}
+
+go build ../
+
+files=""
+for i in $(seq 1 $num_msg); do
+    echo $msg-$i > $msg-$i
+    if ! openssl dgst -binary $msg-$i | ssh-keygen \
+					    -Y sign \
+					    -O hashalg=sha256 \
+					    -f $priv \
+					    -n $(./sigsum namespace) > $msg-$i.sig ; then
+	echo "[FAIL] sign for $num_msg ssh message(s)" >&2
+	exit 1
+    fi
+    files=$(echo -n $files $msg-$i)
+done
+
+echo "[PASS] sign for $num_msg ssh message(s)" >&2
+
+if ! ./sigsum bundle -t ssh -k $pub -d $domain_hint $files; then
+	echo "[FAIL] bundle for $num_msg ssh message(s)" >&2
+	exit 1
+fi
+
+echo "[PASS] bundle for $num_msg ssh message(s)" >&2
+
+if ! ./sigsum verify -t ssh -k $pub $files; then
+	echo "[FAIL] verify for $num_msg ssh message(s)" >&2
+	exit 1
+fi
+
+echo "[PASS] verify for $num_msg ssh message(s)" >&2