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19 changed files with 2718 additions and 683 deletions

5
.gitignore vendored
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@ -1,4 +1 @@
rs
*.exe
*.ics
credentials.json
/target

5
.vscode/settings.json vendored Normal file
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{
"files.exclude": {
"target": true
}
}

2536
Cargo.lock generated Normal file

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15
Cargo.toml Normal file
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[package]
name = "uofgcal"
publish = false
version = "0.1.0"
edition = "2021"
[dependencies]
aes-gcm = "0.10.3"
axum = "0.7.6"
color-eyre = "0.6.3"
rand = "0.8.5"
reqwest = "0.12.7"
serde = { version = "1.0.210", features = ["derive"] }
sqlx = { version = "0.8.2", features = ["runtime-tokio", "sqlite"] }
tokio = { version = "1.40.0", features = ["full"] }

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@ -1,76 +0,0 @@
package auth
import (
"bytes"
"context"
"encoding/gob"
"net/http"
"github.com/danieljoos/wincred"
"golang.org/x/oauth2"
)
type Credentials struct {
GoogleToken *oauth2.Token
GUID string
UofgPass string
}
const credential_name = "uofgsync"
func read_credentials() (*Credentials, error) {
// read from windows credential manager
cred, err := wincred.GetGenericCredential(credential_name)
if err != nil {
return nil, err
}
// deserialize the credentials
var c Credentials
dec := gob.NewDecoder(bytes.NewReader(cred.CredentialBlob))
if err := dec.Decode(&c); err != nil {
return nil, err
}
return &c, nil
}
func save_credentials(credentials Credentials) error {
// serialize the credentials
var buf bytes.Buffer
enc := gob.NewEncoder(&buf)
if err := enc.Encode(credentials); err != nil {
return err
}
// save to windows credential manager
cred := wincred.NewGenericCredential(credential_name)
cred.CredentialBlob = buf.Bytes()
if err := cred.Write(); err != nil {
return err
}
return nil
}
func GetCredentials(config *oauth2.Config) (*Credentials, error) {
creds, err := read_credentials()
if err != nil {
google := fetch_google_token(config)
guid, uofg_pass, err := collect_uofg()
if err != nil {
return nil, err
}
creds = &Credentials{
GoogleToken: google,
GUID: guid,
UofgPass: uofg_pass,
}
save_credentials(*creds)
}
return creds, nil
}
func GetGoogleClient(config *oauth2.Config, token *oauth2.Token) *http.Client {
return config.Client(context.Background(), token)
}

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@ -1,100 +0,0 @@
package auth
import (
"context"
_ "embed"
"fmt"
"math/rand"
"net/http"
"net/url"
"sync"
"github.com/charmbracelet/log"
"github.com/pkg/browser"
"golang.org/x/oauth2"
)
const listen_port = 3745
var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
//go:embed credentials.json
var GoogleOAuthCreds []byte
//go:embed index.html
var tab_html []byte
func randSeq(n int) string {
b := make([]rune, n)
for i := range b {
b[i] = letters[rand.Intn(len(letters))]
}
return string(b)
}
func fetch_google_token(config *oauth2.Config) *oauth2.Token {
// request authorization
var auth_code string
config.RedirectURL = fmt.Sprintf("http://localhost:%d", listen_port)
state_token := randSeq(16)
auth_url := config.AuthCodeURL(state_token, oauth2.AccessTypeOffline)
fmt.Printf("Go to the following link in your browser: \n%v", auth_url)
if err := browser.OpenURL(auth_url); err != nil {
log.Fatal("Unable to open browser: %v", err)
}
// setup http server and wait for auth code
srv := &http.Server{Addr: fmt.Sprintf(":%d", listen_port)}
srv_exit_done := &sync.WaitGroup{}
srv_exit_done.Add(1)
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
// parse query
query, err := url.ParseQuery(r.URL.RawQuery)
if err != nil {
log.Error("Unable to parse query: %v", err)
return
}
// ensure the state token is correct
if query.Get("state") != state_token {
log.Error("Invalid state token")
return
}
// get the auth code
auth_code = query.Get("code")
if auth_code == "" {
log.Error("No auth code provided")
return
}
// send back a response that automatically closes the tab
w.Header().Set("Content-Type", "text/html")
w.WriteHeader(http.StatusOK)
w.Write(tab_html)
// shutdown the http server
if err := srv.Shutdown(context.TODO()); err != nil {
log.Fatal(err)
}
})
go func() {
defer srv_exit_done.Done()
if err := srv.ListenAndServe(); err != http.ErrServerClosed {
log.Fatal("HTTP server error: %v", err)
}
}()
srv_exit_done.Wait()
// exchange auth code for token
token, err := config.Exchange(context.TODO(), auth_code)
if err != nil {
log.Fatalf("Unable to retrieve token from web: %v", err)
}
return token
}

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@ -1,16 +0,0 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>UofG Sync</title>
</head>
<body>
<h1>Authenticated successfully</h1>
<p>You can now safely close this tab.</p>
<script type="text/javascript">
window.close();
</script>
</body>
</html>

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@ -1,37 +0,0 @@
package auth
import (
"bufio"
"encoding/base64"
"fmt"
"os"
"strings"
"syscall"
"golang.org/x/term"
)
func GetHeader(guid string, password string) string {
b64 := base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%s:%s", guid, password)))
return fmt.Sprintf("Basic %s", b64)
}
func collect_uofg() (string, string, error) {
reader := bufio.NewReader(os.Stdin)
fmt.Print("Enter your GUID: ")
username, err := reader.ReadString('\n')
if err != nil {
return "", "", err
}
fmt.Print("Enter your password: ")
bytePassword, err := term.ReadPassword(int(syscall.Stdin))
if err != nil {
return "", "", err
}
password := string(bytePassword)
return strings.TrimSpace(username), strings.TrimSpace(password), nil
}

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@ -1,90 +0,0 @@
package fetch
import (
"net/http"
"strings"
"time"
"git.newty.dev/uofgsync/auth"
ics "github.com/arran4/golang-ical"
"github.com/charmbracelet/log"
cron "github.com/go-co-op/gocron/v2"
"golang.org/x/oauth2/google"
"google.golang.org/api/calendar/v3"
)
const calendar_url = "https://frontdoor.spa.gla.ac.uk/spacett/download/uogtimetable.ics"
var Scheduler *cron.Scheduler
func StartScheduler() {
// fetch credentials
config, err := google.ConfigFromJSON(auth.GoogleOAuthCreds, calendar.CalendarReadonlyScope)
if err != nil {
log.Fatal(err)
}
credentials, err := auth.GetCredentials(config)
if err != nil {
log.Fatal(err)
}
// create scheduler
Scheduler, err := cron.NewScheduler()
if err != nil {
log.Fatal(err)
}
j, err := Scheduler.NewJob(
// every 24 hours
cron.DurationJob(
24*time.Hour,
),
// update the calendar
cron.NewTask(
update_calendar,
auth.GetHeader(credentials.GUID, credentials.UofgPass),
auth.GetGoogleClient(config, credentials.GoogleToken),
),
)
if err != nil {
log.Fatal(err)
}
// run job and start scheduler
go j.RunNow()
Scheduler.Start()
}
func update_calendar(authorization string, google *http.Client) {
// create request
req, err := http.NewRequest("GET", calendar_url, nil)
if err != nil {
log.Fatal(err)
}
req.Header.Set("Authorization", authorization)
// send request
resp, err := http.DefaultClient.Do(req)
if err != nil {
log.Fatal(err)
}
defer resp.Body.Close()
// check if authentication failed
if resp.StatusCode == 401 {
log.Fatal("authentication failed")
}
// parse ics file
calendar, err := ics.ParseCalendar(resp.Body)
if err != nil {
log.Fatal(err)
}
for _, event := range calendar.Events() {
name := event.GetProperty(ics.ComponentPropertySummary).Value
location := strings.TrimSpace(strings.Replace(event.GetProperty(ics.ComponentPropertyLocation).Value, "ON CAMPUS:", "", 1))
log.Infof("%s: %s", name, location)
}
}

61
go.mod
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@ -1,61 +0,0 @@
module git.newty.dev/uofgsync
go 1.23.2
require github.com/charmbracelet/log v0.4.0
require (
cloud.google.com/go/auth v0.9.9 // indirect
cloud.google.com/go/auth/oauth2adapt v0.2.4 // indirect
cloud.google.com/go/compute/metadata v0.5.2 // indirect
github.com/ChannelMeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61 // indirect
github.com/arran4/golang-ical v0.3.1 // indirect
github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
github.com/charmbracelet/lipgloss v0.10.0 // indirect
github.com/danieljoos/wincred v1.2.2 // indirect
github.com/felixge/httpsnoop v1.0.4 // indirect
github.com/getlantern/context v0.0.0-20190109183933-c447772a6520 // indirect
github.com/getlantern/errors v0.0.0-20190325191628-abdb3e3e36f7 // indirect
github.com/getlantern/golog v0.0.0-20190830074920-4ef2e798c2d7 // indirect
github.com/getlantern/hex v0.0.0-20190417191902-c6586a6fe0b7 // indirect
github.com/getlantern/hidden v0.0.0-20190325191715-f02dbb02be55 // indirect
github.com/getlantern/ops v0.0.0-20190325191751-d70cb0d6f85f // indirect
github.com/getlantern/systray v1.2.2 // indirect
github.com/go-co-op/gocron/v2 v2.12.1 // indirect
github.com/go-logfmt/logfmt v0.6.0 // indirect
github.com/go-logr/logr v1.4.2 // indirect
github.com/go-logr/stdr v1.2.2 // indirect
github.com/go-stack/stack v1.8.0 // indirect
github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
github.com/google/s2a-go v0.1.8 // indirect
github.com/google/uuid v1.6.0 // indirect
github.com/googleapis/enterprise-certificate-proxy v0.3.4 // indirect
github.com/googleapis/gax-go/v2 v2.13.0 // indirect
github.com/jonboulle/clockwork v0.4.0 // indirect
github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
github.com/mattn/go-isatty v0.0.18 // indirect
github.com/mattn/go-runewidth v0.0.15 // indirect
github.com/muesli/reflow v0.3.0 // indirect
github.com/muesli/termenv v0.15.2 // indirect
github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c // indirect
github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c // indirect
github.com/rivo/uniseg v0.4.7 // indirect
github.com/robfig/cron/v3 v3.0.1 // indirect
go.opencensus.io v0.24.0 // indirect
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.54.0 // indirect
go.opentelemetry.io/otel v1.29.0 // indirect
go.opentelemetry.io/otel/metric v1.29.0 // indirect
go.opentelemetry.io/otel/trace v1.29.0 // indirect
go.uber.org/atomic v1.9.0 // indirect
golang.org/x/crypto v0.28.0 // indirect
golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8 // indirect
golang.org/x/net v0.30.0 // indirect
golang.org/x/oauth2 v0.23.0 // indirect
golang.org/x/sys v0.26.0 // indirect
golang.org/x/term v0.25.0 // indirect
golang.org/x/text v0.19.0 // indirect
google.golang.org/api v0.203.0 // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20241015192408-796eee8c2d53 // indirect
google.golang.org/grpc v1.67.1 // indirect
google.golang.org/protobuf v1.35.1 // indirect
)

250
go.sum
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@ -1,250 +0,0 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.116.0 h1:B3fRrSDkLRt5qSHWe40ERJvhvnQwdZiHu0bJOpldweE=
cloud.google.com/go/auth v0.9.9 h1:BmtbpNQozo8ZwW2t7QJjnrQtdganSdmqeIBxHxNkEZQ=
cloud.google.com/go/auth v0.9.9/go.mod h1:xxA5AqpDrvS+Gkmo9RqrGGRh6WSNKKOXhY3zNOr38tI=
cloud.google.com/go/auth/oauth2adapt v0.2.4 h1:0GWE/FUsXhf6C+jAkWgYm7X9tK8cuEIfy19DBn6B6bY=
cloud.google.com/go/auth/oauth2adapt v0.2.4/go.mod h1:jC/jOpwFP6JBxhB3P5Rr0a9HLMC/Pe3eaL4NmdvqPtc=
cloud.google.com/go/compute/metadata v0.3.0 h1:Tz+eQXMEqDIKRsmY3cHTL6FVaynIjX2QxYC4trgAKZc=
cloud.google.com/go/compute/metadata v0.3.0/go.mod h1:zFmK7XCadkQkj6TtorcaGlCW1hT1fIilQDwofLpJ20k=
cloud.google.com/go/compute/metadata v0.5.2 h1:UxK4uu/Tn+I3p2dYWTfiX4wva7aYlKixAHn3fyqngqo=
cloud.google.com/go/compute/metadata v0.5.2/go.mod h1:C66sj2AluDcIqakBq/M8lw8/ybHgOZqin2obFxa/E5k=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/ChannelMeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61 h1:N5Vqww5QISEHsWHOWDEx4PzdIay3Cg0Jp7zItq2ZAro=
github.com/ChannelMeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61/go.mod h1:GnKXcK+7DYNy/8w2Ex//Uql4IgfaU82Cd5rWKb7ah00=
github.com/apognu/gocal v0.9.0 h1:2lGdZprjYs9A6l1RTEmapmpE1PiDbXNX8bUVqZt3vm4=
github.com/apognu/gocal v0.9.0/go.mod h1:ZOJfNOqpz8aasi3uqzDu+eWTT6VuEa/TvQWiYYWlb80=
github.com/arran4/golang-ical v0.3.1 h1:v13B3eQZ9VDHTAvT6M11vVzxYgcYmjyPBE2eAZl3VZk=
github.com/arran4/golang-ical v0.3.1/go.mod h1:LZWxF8ZIu/sjBVUCV0udiVPrQAgq3V0aa0RfbO99Qkk=
github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
github.com/channelmeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61/go.mod h1:Rp8e0DCtEKwXFOC6JPJQVTz8tuGoGvw6Xfexggh/ed0=
github.com/charmbracelet/lipgloss v0.10.0 h1:KWeXFSexGcfahHX+54URiZGkBFazf70JNMtwg/AFW3s=
github.com/charmbracelet/lipgloss v0.10.0/go.mod h1:Wig9DSfvANsxqkRsqj6x87irdy123SR4dOXlKa91ciE=
github.com/charmbracelet/log v0.4.0 h1:G9bQAcx8rWA2T3pWvx7YtPTPwgqpk7D68BX21IRW8ZM=
github.com/charmbracelet/log v0.4.0/go.mod h1:63bXt/djrizTec0l11H20t8FDSvA4CRZJ1KH22MdptM=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
github.com/danieljoos/wincred v1.2.2 h1:774zMFJrqaeYCK2W57BgAem/MLi6mtSE47MB6BOJ0i0=
github.com/danieljoos/wincred v1.2.2/go.mod h1:w7w4Utbrz8lqeMbDAK0lkNJUv5sAOkFi7nd/ogr0Uh8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg=
github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
github.com/getlantern/context v0.0.0-20190109183933-c447772a6520 h1:NRUJuo3v3WGC/g5YiyF790gut6oQr5f3FBI88Wv0dx4=
github.com/getlantern/context v0.0.0-20190109183933-c447772a6520/go.mod h1:L+mq6/vvYHKjCX2oez0CgEAJmbq1fbb/oNJIWQkBybY=
github.com/getlantern/errors v0.0.0-20190325191628-abdb3e3e36f7 h1:6uJ+sZ/e03gkbqZ0kUG6mfKoqDb4XMAzMIwlajq19So=
github.com/getlantern/errors v0.0.0-20190325191628-abdb3e3e36f7/go.mod h1:l+xpFBrCtDLpK9qNjxs+cHU6+BAdlBaxHqikB6Lku3A=
github.com/getlantern/golog v0.0.0-20190830074920-4ef2e798c2d7 h1:guBYzEaLz0Vfc/jv0czrr2z7qyzTOGC9hiQ0VC+hKjk=
github.com/getlantern/golog v0.0.0-20190830074920-4ef2e798c2d7/go.mod h1:zx/1xUUeYPy3Pcmet8OSXLbF47l+3y6hIPpyLWoR9oc=
github.com/getlantern/hex v0.0.0-20190417191902-c6586a6fe0b7 h1:micT5vkcr9tOVk1FiH8SWKID8ultN44Z+yzd2y/Vyb0=
github.com/getlantern/hex v0.0.0-20190417191902-c6586a6fe0b7/go.mod h1:dD3CgOrwlzca8ed61CsZouQS5h5jIzkK9ZWrTcf0s+o=
github.com/getlantern/hidden v0.0.0-20190325191715-f02dbb02be55 h1:XYzSdCbkzOC0FDNrgJqGRo8PCMFOBFL9py72DRs7bmc=
github.com/getlantern/hidden v0.0.0-20190325191715-f02dbb02be55/go.mod h1:6mmzY2kW1TOOrVy+r41Za2MxXM+hhqTtY3oBKd2AgFA=
github.com/getlantern/ops v0.0.0-20190325191751-d70cb0d6f85f h1:wrYrQttPS8FHIRSlsrcuKazukx/xqO/PpLZzZXsF+EA=
github.com/getlantern/ops v0.0.0-20190325191751-d70cb0d6f85f/go.mod h1:D5ao98qkA6pxftxoqzibIBBrLSUli+kYnJqrgBf9cIA=
github.com/getlantern/systray v1.2.2 h1:dCEHtfmvkJG7HZ8lS/sLklTH4RKUcIsKrAD9sThoEBE=
github.com/getlantern/systray v1.2.2/go.mod h1:pXFOI1wwqwYXEhLPm9ZGjS2u/vVELeIgNMY5HvhHhcE=
github.com/go-co-op/gocron v1.37.0 h1:ZYDJGtQ4OMhTLKOKMIch+/CY70Brbb1dGdooLEhh7b0=
github.com/go-co-op/gocron v1.37.0/go.mod h1:3L/n6BkO7ABj+TrfSVXLRzsP26zmikL4ISkLQ0O8iNY=
github.com/go-co-op/gocron/v2 v2.12.1 h1:dCIIBFbzhWKdgXeEifBjHPzgQ1hoWhjS4289Hjjy1uw=
github.com/go-co-op/gocron/v2 v2.12.1/go.mod h1:xY7bJxGazKam1cz04EebrlP4S9q4iWdiAylMGP3jY9w=
github.com/go-logfmt/logfmt v0.6.0 h1:wGYYu3uicYdqXVgoYbvnkrPVXkuLM1p1ifugDMEdRi4=
github.com/go-logfmt/logfmt v0.6.0/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KEVveWlfTs=
github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
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github.com/jonboulle/clockwork v0.4.0 h1:p4Cf1aMWXnXAUh8lVfewRBx1zaTSYKrKMF2g3ST4RZ4=
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github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
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github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
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github.com/lxn/walk v0.0.0-20210112085537-c389da54e794/go.mod h1:E23UucZGqpuUANJooIbHWCufXvOcT6E7Stq81gU+CSQ=
github.com/lxn/win v0.0.0-20210218163916-a377121e959e/go.mod h1:KxxjdtRkfNoYDCUP5ryK7XJJNTnpC8atvtmTheChOtk=
github.com/mattn/go-isatty v0.0.18 h1:DOKFKCQ7FNG2L1rbrmstDN4QVRdS89Nkh85u68Uwp98=
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github.com/muesli/reflow v0.3.0 h1:IFsN6K9NfGtjeggFP+68I4chLZV2yIKsXJFNZ+eWh6s=
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github.com/muesli/termenv v0.15.2 h1:GohcuySI0QmI3wN8Ok9PtKGkgkFIk7y6Vpb5PvrY+Wo=
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github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c/go.mod h1:X07ZCGwUbLaax7L0S3Tw4hpejzu63ZrrQiUe6W0hcy0=
github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c h1:+mdjkGKdHQG3305AYmdv1U2eRNDiU2ErMBj1gwrq8eQ=
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github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
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github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
github.com/robfig/cron/v3 v3.0.1 h1:WdRxkvbJztn8LMz/QEvLN5sBU+xKpSqwwUO1Pjr4qDs=
github.com/robfig/cron/v3 v3.0.1/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
github.com/rogpeppe/go-internal v1.8.1/go.mod h1:JeRgkft04UBgHMgCIwADu4Pn6Mtm5d4nPKWu0nJ5d+o=
github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966/go.mod h1:sUM3LWHvSMaG192sy56D9F7CNvL7jUJVXoqM1QKLnog=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
github.com/stretchr/testify v1.2.0/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0=
go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo=
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.54.0 h1:TT4fX+nBOA/+LUkobKGW1ydGcn+G3vRw9+g5HwCphpk=
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.54.0/go.mod h1:L7UH0GbB0p47T4Rri3uHjbpCFYrVrwc1I25QhNPiGK8=
go.opentelemetry.io/otel v1.29.0 h1:PdomN/Al4q/lN6iBJEN3AwPvUiHPMlt93c8bqTG5Llw=
go.opentelemetry.io/otel v1.29.0/go.mod h1:N/WtXPs1CNCUEx+Agz5uouwCba+i+bJGFicT8SR4NP8=
go.opentelemetry.io/otel/metric v1.29.0 h1:vPf/HFWTNkPu1aYeIsc98l4ktOQaL6LeSoeV2g+8YLc=
go.opentelemetry.io/otel/metric v1.29.0/go.mod h1:auu/QWieFVWx+DmQOUMgj0F8LHWdgalxXqvp7BII/W8=
go.opentelemetry.io/otel/trace v1.29.0 h1:J/8ZNK4XgR7a21DZUAsbF8pZ5Jcw1VhACmnYt39JTi4=
go.opentelemetry.io/otel/trace v1.29.0/go.mod h1:eHl3w0sp3paPkYstJOmAimxhiFXPg+MMTlEh3nsQgWQ=
go.uber.org/atomic v1.9.0 h1:ECmE8Bn/WFTYwEW/bpKD3M8VtR/zQVbavAoalC1PYyE=
go.uber.org/atomic v1.9.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.28.0 h1:GBDwsMXVQi34v5CCYUm2jkJvu4cbtru2U4TN2PSyQnw=
golang.org/x/crypto v0.28.0/go.mod h1:rmgy+3RHxRZMyY0jjAJShp2zgEdOqj2AO7U0pYmeQ7U=
golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20231006140011-7918f672742d h1:jtJma62tbqLibJ5sFQz8bKtEM8rJBtfilJ2qTU199MI=
golang.org/x/exp v0.0.0-20231006140011-7918f672742d/go.mod h1:ldy0pHrwJyGW56pPQzzkH36rKxoZW1tw7ZJpeKx+hdo=
golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8 h1:yixxcjnhBmY0nkL253HFVIm0JsFHwrHdT3Yh6szTnfY=
golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8/go.mod h1:jj3sYF3dwk5D+ghuXyeI3r5MFf+NT2An6/9dOA95KSI=
golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
golang.org/x/net v0.30.0 h1:AcW1SDZMkb8IpzCdQUaIq2sP4sZ4zw+55h6ynffypl4=
golang.org/x/net v0.30.0/go.mod h1:2wGyMJ5iFasEhkwi13ChkO/t1ECNC4X4eBKkVFyYFlU=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/oauth2 v0.23.0 h1:PbgcYx2W7i4LvjJWEbf0ngHV6qJYr86PkAV3bXdLEbs=
golang.org/x/oauth2 v0.23.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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12
main.go
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package main
import (
"git.newty.dev/uofgsync/fetch"
"git.newty.dev/uofgsync/tray"
"github.com/getlantern/systray"
)
func main() {
fetch.StartScheduler()
systray.Run(tray.OnReady, tray.OnExit)
}

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readme.md Normal file
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<div align="center">
<img src="marquee.jpg" height="175">
<h1>UofG Calendar Sync</h1>
</div>
The University of Glasgow's timetable ICS is locked behind authentication, preventing popular calendar apps like [Google Calendar](https://calendar.google.com/) from synchronising it. **uofgcal** is a service which acts as a proxy to the calendar file, authenticating on behalf of calendar apps that do not support authentication.
This service is provided for all students, free-of-charge. The service can also be self-hosted, for those concerned about security - however the system is designed to be as bullet-proof as possible as it handles incredibly sensible data.
This software is in early alpha stages, so expect many breaking changes. You can see a roadmap of what is to come below.
### Roadmap
- logging
- web dashboard
- key rotation
- emails for when authentication fails

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src/auth.rs Normal file
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use aes_gcm::{
aead::{
consts::{B0, B1},
generic_array::GenericArray,
Aead,
},
aes::cipher::typenum::{UInt, UTerm},
AeadCore, Aes256Gcm,
};
use color_eyre::{eyre::eyre, Result};
use rand::rngs::OsRng;
pub type Nonce = GenericArray<u8, UInt<UInt<UInt<UInt<UTerm, B1>, B1>, B0>, B0>>;
pub fn encrypt_password(password: &str, cipher: &Aes256Gcm) -> Result<(Vec<u8>, Nonce)> {
let nonce = Aes256Gcm::generate_nonce(&mut OsRng);
let ciphertext = cipher
.encrypt(&nonce, password.as_bytes().as_ref())
.map_err(|_| eyre!("Failed to encrypt password"))?;
Ok((ciphertext, nonce))
}
pub fn decrypt_password(ciphertext: &[u8], nonce: &Nonce, cipher: &Aes256Gcm) -> Result<String> {
let password = cipher
.decrypt(nonce, ciphertext.as_ref())
.map_err(|_| eyre!("Failed to decrypt password"))?;
Ok(String::from_utf8(password).map_err(|_| eyre!("Failed to convert password to string"))?)
}

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src/main.rs Normal file
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mod auth;
use aes_gcm::{Aes256Gcm, KeyInit};
use axum::{
extract::{Query, State},
http::StatusCode,
response::{AppendHeaders, IntoResponse},
routing::get,
Router,
};
use color_eyre::Result;
use rand::rngs::OsRng;
use reqwest::{header, Client};
use serde::Deserialize;
use sqlx::{Executor, SqlitePool};
use std::borrow::Cow;
use tokio::net::TcpListener;
const PORT: u16 = 8080;
const CALENDAR_URL: &str = "https://frontdoor.spa.gla.ac.uk/spacett/download/uogtimetable.ics";
#[derive(Deserialize)]
struct AuthPayload {
guid: Cow<'static, str>,
pass: Cow<'static, str>,
}
#[derive(Clone)]
struct AppState {
cipher: Aes256Gcm,
client: Client,
pool: SqlitePool,
}
async fn get_calender(
Query(auth): Query<AuthPayload>,
State(AppState { client, .. }): State<AppState>,
) -> impl IntoResponse {
if let Ok(resp) = client
.get(CALENDAR_URL)
.basic_auth(auth.guid.as_ref(), Some(auth.pass.as_ref()))
.send()
.await
{
match resp.status() {
StatusCode::UNAUTHORIZED => {
Err((StatusCode::UNAUTHORIZED, "Invalid username or password"))
}
_ => Ok((
AppendHeaders([
(header::CONTENT_TYPE, "text/calendar; charset=utf-8"),
(
header::CONTENT_DISPOSITION,
r#"attachment; filename="calendar.ics""#,
),
]),
resp.bytes().await.ok().unwrap_or_default(),
)),
}
} else {
Err((
StatusCode::INTERNAL_SERVER_ERROR,
"Failed to fetch calendar",
))
}
}
#[tokio::main]
async fn main() -> Result<()> {
color_eyre::install()?;
// connect to the database
let pool = SqlitePool::connect(if cfg!(debug_assertions) {
"sqlite::memory:"
} else {
"uofgcal.db"
})
.await?;
// ensure the users table exists
let mut handle = pool.acquire().await?;
// todo: rewrite
handle
.execute(
"CREATE TABLE IF NOT EXISTS users (
guid VARCHAR(8) PRIMARY KEY,
nonce BLOB NOT NULL,
pass BLOB NOT NULL
)",
)
.await?;
handle.close().await?;
// prepare state
let client = Client::new();
let cipher = Aes256Gcm::new({
// todo: read from disk in production
&Aes256Gcm::generate_key(OsRng)
});
let state = AppState {
cipher,
client,
pool,
};
// start the server
let tcp_listener = TcpListener::bind(format!("0.0.0.0:{PORT}")).await?;
let router = Router::new()
.route("/", get(get_calender))
.with_state(state);
axum::serve(tcp_listener, router).await?;
Ok(())
}

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package tray
import (
_ "embed"
"git.newty.dev/uofgsync/fetch"
"github.com/charmbracelet/log"
"github.com/getlantern/systray"
)
//go:embed uofg.ico
var icon []byte
func OnReady() {
systray.SetTitle("UofG Sync") // mac+linux
systray.SetTooltip("UofG Sync")
systray.SetIcon(icon)
// todo: last synced
// todo: force sync
// todo: pause sync
// todo: options
// quit button
quit := systray.AddMenuItem("Quit", "Quit the application")
go func() {
<-quit.ClickedCh
systray.Quit()
}()
}
func OnExit() {
err := (*fetch.Scheduler).Shutdown()
if err != nil {
log.Fatal(err)
}
}

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