tangled.org
+29
-14
cmd/repoguard/main.go
+29
-14
cmd/repoguard/main.go
···
1
1
package main
2
2
3
3
import (
4
+
"context"
4
5
"flag"
5
6
"fmt"
6
7
"log"
7
8
"os"
8
9
"os/exec"
10
+
"path"
9
11
"path/filepath"
10
12
"strings"
11
13
"time"
14
+
15
+
"github.com/icyphox/bild/routes/auth"
12
16
)
13
17
14
18
var (
···
58
62
}
59
63
60
64
gitCommand := cmdParts[0]
61
-
repoName := strings.Trim(cmdParts[1], "'")
65
+
66
+
// example.com/repo
67
+
handlePath := strings.Trim(cmdParts[1], "'")
68
+
repoName := handleToDID(handlePath)
62
69
63
70
validCommands := map[string]bool{
64
71
"git-receive-pack": true,
···
69
76
exitWithLog("access denied: invalid git command")
70
77
}
71
78
72
-
if !isAllowedUser(*allowedUser, repoName) {
73
-
exitWithLog("access denied: user not allowed")
79
+
did := path.Dir(repoName)
80
+
if gitCommand != "git-upload-pack" {
81
+
if !isAllowedUser(*allowedUser, did) {
82
+
exitWithLog("access denied: user not allowed")
83
+
}
74
84
}
75
85
76
86
fullPath := filepath.Join(*baseDirFlag, repoName)
···
101
111
})
102
112
}
103
113
114
+
func handleToDID(handlePath string) string {
115
+
handle := path.Dir(handlePath)
116
+
117
+
ident, err := auth.ResolveIdent(context.Background(), handle)
118
+
if err != nil {
119
+
exitWithLog(fmt.Sprintf("error resolving handle: %v", err))
120
+
}
121
+
122
+
// did:plc:foobarbaz/repo
123
+
didPath := filepath.Join(ident.DID.String(), path.Base(handlePath))
124
+
125
+
return didPath
126
+
}
127
+
104
128
func initLogger() {
105
129
var err error
106
130
logFile, err = os.OpenFile(*logPathFlag, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0600)
···
142
166
}
143
167
}
144
168
145
-
func isAllowedUser(user, repoPath string) bool {
146
-
fullPath := filepath.Join(*baseDirFlag, repoPath)
147
-
didPath := filepath.Join(fullPath, "did")
148
-
149
-
didBytes, err := os.ReadFile(didPath)
150
-
if err != nil {
151
-
return false
152
-
}
153
-
154
-
allowedUser := strings.TrimSpace(string(didBytes))
155
-
return allowedUser == user
169
+
func isAllowedUser(user, did string) bool {
170
+
return user == did
156
171
}
+3
-3
routes/auth/auth.go
+3
-3
routes/auth/auth.go
···
21
21
return &Auth{store}
22
22
}
23
23
24
-
func resolveIdent(ctx context.Context, arg string) (*identity.Identity, error) {
24
+
func ResolveIdent(ctx context.Context, arg string) (*identity.Identity, error) {
25
25
id, err := syntax.ParseAtIdentifier(arg)
26
26
if err != nil {
27
27
return nil, err
···
57
57
58
58
func (a *Auth) CreateInitialSession(w http.ResponseWriter, r *http.Request, username, appPassword string) (AtSessionCreate, error) {
59
59
ctx := r.Context()
60
-
resolved, err := resolveIdent(ctx, username)
60
+
resolved, err := ResolveIdent(ctx, username)
61
61
if err != nil {
62
62
return AtSessionCreate{}, fmt.Errorf("invalid handle: %s", err)
63
63
}
···
118
118
return nil, fmt.Errorf("user is not authenticated")
119
119
}
120
120
121
-
return resolveIdent(r.Context(), did)
121
+
return ResolveIdent(r.Context(), did)
122
122
}