Added CLI and more functionality

internal/oauth/oauth.go

@@ -0,0 +1,15 @@
+package oauth
+
+type Client struct {
+	Id     string
+	Secret string
+	Issuer string
+}
+
+func NewClient() *Client {
+	return &Client{
+		Id:     "",
+		Secret: "",
+		Issuer: "",
+	}
+}

internal/oidc/oidc.go

@@ -0,0 +1,28 @@
+package oidc
+
+type OpenIDConnectProvider struct {
+	Host              string
+	AuthorizeEndpoint string
+	TokenEndpoint     string
+	ConfigEndpoint    string
+}
+
+func NewOIDCProvider() *OpenIDConnectProvider {
+	return &OpenIDConnectProvider{
+		Host:              "https://gitlab.newmexicoconsortium.org",
+		AuthorizeEndpoint: "/oauth/authorize",
+		TokenEndpoint:     "/oauth/token",
+	}
+}
+
+func (oidc *OpenIDConnectProvider) GetAuthorizeUrl() string {
+	return oidc.Host + oidc.AuthorizeEndpoint
+}
+
+func (oidc *OpenIDConnectProvider) GetTokenUrl() string {
+	return oidc.Host + oidc.TokenEndpoint
+}
+
+func (oidc *OpenIDConnectProvider) FetchServerConfiguration(url string) {
+	// make a request to a server's openid-configuration
+}

internal/server/server.go

@@ -0,0 +1,16 @@
+package server
+
+import (
+	"fmt"
+	"net/http"
+)
+
+func Start(host string, port int) error {
+	http.HandleFunc("/oauth/callback", getAuthorizationCode)
+	err := http.ListenAndServe(host+":"+fmt.Sprintf("%d", port), nil)
+	return err
+}
+
+func getAuthorizationCode(w http.ResponseWriter, r *http.Request) {
+	fmt.Printf("response from OIDC provider: %v\n", r)
+}

internal/util/util.go

@@ -0,0 +1,39 @@
+package util
+
+import (
+	"math/rand"
+	"strings"
+)
+
+const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+const (
+	letterIdxBits = 6                    // 6 bits to represent a letter index
+	letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
+	letterIdxMax  = 63 / letterIdxBits   // # of letter indices fitting in 63 bits
+)
+
+func RandomString(n int) string {
+	b := make([]byte, n)
+	// A rand.Int63() generates 63 random bits, enough for letterIdxMax letters!
+	for i, cache, remain := n-1, rand.Int63(), letterIdxMax; i >= 0; {
+		if remain == 0 {
+			cache, remain = rand.Int63(), letterIdxMax
+		}
+		if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
+			b[i] = letterBytes[idx]
+			i--
+		}
+		cache >>= letterIdxBits
+		remain--
+	}
+
+	return string(b)
+}
+
+func BuildAuthorizationUrl(authEndpoint string, clientId string, redirectUri []string, state string, responseType string, scope []string) string {
+	return authEndpoint + "?" + "cilent_id=" + clientId +
+		"&redirect_url=" + strings.Join(redirectUri, ",") +
+		"&response_type=" + responseType +
+		"&state=" + state +
+		"&scope=" + strings.Join(scope, "+")
+}