Initial commit: crypto.go and protocol.go implementation + unit tests

protocol_test.go

@@ -0,0 +1,36 @@
+package ownwire_sdk_test
+
+import (
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+
+	sdk "ownwire.net/ownwire-sdk"
+)
+
+var _ = Describe("ParseSessionInit", func() {
+	It("parses a valid /session line", func() {
+		line := "/session:cb653f53-6f7d-4aeb-ba0d-d2b17c290d8a:SERVERPUBB64:SALTB64:12:34"
+		parsed, err := sdk.ParseSessionInit(line)
+		Expect(err).To(BeNil())
+		Expect(parsed.SessionId).To(Equal("cb653f53-6f7d-4aeb-ba0d-d2b17c290d8a"))
+		Expect(parsed.ServerPubKeyB64).To(Equal("SERVERPUBB64"))
+		Expect(parsed.SaltB64).To(Equal("SALTB64"))
+		Expect(parsed.SeqOut).To(Equal(uint64(12)))
+		Expect(parsed.SeqInMax).To(Equal(uint64(34)))
+	})
+
+	It("rejects non-session lines", func() {
+		_, err := sdk.ParseSessionInit("/wat:1:2:3:4:5")
+		Expect(err).ToNot(BeNil())
+	})
+
+	It("rejects missing fields", func() {
+		_, err := sdk.ParseSessionInit("/session:1:2:3")
+		Expect(err).ToNot(BeNil())
+	})
+
+	It("rejects bad sequence numbers", func() {
+		_, err := sdk.ParseSessionInit("/session:1:2:3:nope:5")
+		Expect(err).ToNot(BeNil())
+	})
+})