Add backends and simulated TPM device

Signed-off-by: Ettore Di Giacinto <edigiacinto@suse.com>

tpm_test.go

@@ -0,0 +1,54 @@
+package tpm_test
+
+import (
+	"os"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	. "github.com/rancher-sandbox/go-tpm"
+	. "github.com/rancher-sandbox/go-tpm/backend"
+)
+
+// In order to run this suite a swtpm socket is required. e.g.:
+// swtpm socket --server type=unixio,path=/tmp/tpm-server --ctrl type=unixio,path=/tmp/tpm-ctrl --tpm2
+// SWTPM_SOCKET=/tmp/tpm-ctrl ginkgo -r ./
+
+var _ = Describe("TPM with SWTPM", func() {
+	socket := os.Getenv("SWTPM_SOCKET")
+	Context("opening socket connection", func() {
+		// Note, this doesn't work
+		PIt("dials in just fine", func() {
+			if socket == "" {
+				Skip("No socket file specified")
+			}
+
+			b, err := Socket(socket)
+			Expect(err).ToNot(HaveOccurred())
+
+			str, err := GetPubHash(WithCommandChannel(b))
+			Expect(err).ToNot(HaveOccurred())
+
+			Expect(str).ToNot(BeEmpty())
+		})
+	})
+})
+
+var _ = Describe("Simulated TPM", func() {
+	Context("opening socket connection", func() {
+		It("dials in just fine", func() {
+			str, err := GetPubHash(Emulated)
+			Expect(err).ToNot(HaveOccurred())
+			Expect(str).ToNot(BeEmpty())
+		})
+	})
+
+	Context("specifying a seed", func() {
+		It("same pubkey with same seed", func() {
+			str, err := GetPubHash(Emulated, WithSeed(1))
+			Expect(err).ToNot(HaveOccurred())
+			str2, err := GetPubHash(Emulated, WithSeed(1))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(str).To(Equal(str2))
+		})
+	})
+})