Implement SSH signing retrieval

keys.go

@@ -50,6 +50,44 @@ func declareAPIKeysRoutes(router *gin.RouterGroup) {
 
 		c.Data(http.StatusOK, "application/pgp-keys", ret)
 	})
+
+	usersRoutes.GET("/allowed_signers", func(c *gin.Context) {
+		var u *User
+		if user, ok := c.Get("user"); ok {
+			u = user.(*User)
+		} else {
+			u = c.MustGet("LoggedUser").(*User)
+		}
+
+		user, err := GitLab_getUser(c.Request.Context(), u)
+		if err != nil {
+			log.Println("Unable to GitLab_getUser:", err)
+			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"errmsg": "Unable to retrieve your GitLab user. Please try again in a few moment."})
+			return
+		}
+
+		keys, err := GitLab_getUserSSHKeys(c.Request.Context(), u)
+		if err != nil {
+			log.Println("Unable to GitLab_getUserSSHKeys:", err)
+			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"errmsg": "Unable to retrieve your keys from GitLab. Please try again in a few moment."})
+			return
+		}
+
+		var ret string
+		for _, k := range keys {
+			if k.UsageType != "auth_and_signing" && k.UsageType != "signing" {
+				continue
+			}
+
+			if len(user.Email) > 0 {
+				ret += fmt.Sprintf("%s %s\n", user.Email, k.Key)
+			} else {
+				ret += fmt.Sprintf("*@epita.fr %s\n", k.Key)
+			}
+		}
+
+		c.Data(http.StatusOK, "text/plain", []byte(ret))
+	})
 }
 
 func declareAPIAuthKeysRoutes(router *gin.RouterGroup) {