2 files changed, 25 insertions, 0 deletions
diff --git a/server/certutil/util.go b/server/certutil/util.go
new file mode 100644
index 0000000..eb1900b
--- /dev/null
+++ b/server/certutil/util.go
@@ -0,0 +1,10 @@
+package certutil
+
+import "golang.org/x/crypto/ssh"
+
+// GetPublicKey marshals a ssh certificate to a string.
+func GetPublicKey(cert *ssh.Certificate) string {
+	marshaled := ssh.MarshalAuthorizedKey(cert)
+	// Strip trailing newline
+	return string(marshaled[:len(marshaled)-1])
+}
diff --git a/server/certutil/util_test.go b/server/certutil/util_test.go
new file mode 100644
index 0000000..abb8f10
--- /dev/null
+++ b/server/certutil/util_test.go
@@ -0,0 +1,15 @@
+package certutil
+
+import (
+	"testing"
+
+	"github.com/nsheridan/cashier/testdata"
+	"golang.org/x/crypto/ssh"
+)
+
+func TestGetPublicKey(t *testing.T) {
+	c, _, _, _, _ := ssh.ParseAuthorizedKey(testdata.Cert)
+	if GetPublicKey(c.(*ssh.Certificate)) != string(testdata.Cert) {
+		t.Fail()
+	}
+}