1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
// Copyright 2016 Google LLC. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// chainfix is a utility program for fixing the validation chains for certificates.
package main
import (
"context"
"crypto/sha256"
"encoding/base64"
"encoding/json"
"io"
"log"
"net/http"
"os"
"sync"
"github.com/google/certificate-transparency-go/client"
"github.com/google/certificate-transparency-go/fixchain"
"github.com/google/certificate-transparency-go/jsonclient"
"github.com/google/certificate-transparency-go/x509"
"golang.org/x/time/rate"
)
// Assumes chains to be stores in a file in JSON encoded with the certificates
// in DER format.
func processChains(file string, fl *fixchain.FixAndLog) {
f, err := os.Open(file)
if err != nil {
log.Fatalf("Can't open %q: %s", file, err)
}
defer func() {
if err := f.Close(); err != nil {
log.Fatalf("Can't close file: %v", err)
}
}()
type Chain struct {
Chain [][]byte
}
dec := json.NewDecoder(f)
for {
var m Chain
if err := dec.Decode(&m); err == io.EOF {
break
} else if err != nil {
log.Fatal(err)
}
var chain []*x509.Certificate
for _, derBytes := range m.Chain {
cert, err := x509.ParseCertificate(derBytes)
if x509.IsFatal(err) {
log.Fatalf("can't parse certificate: %s %#v", err, derBytes)
}
chain = append(chain, cert)
}
fl.QueueAllCertsInChain(chain)
}
}
// A simple function to save the FixErrors that are spat out by the FixAndLog to
// a directory. contentStore() is the function to alter to store the errors
// wherever/however they need to be stored. Both logStringErrors() and
// logJSONErrors() use this function as a way of storing the resulting
// FixErrors.
func contentStore(baseDir string, subDir string, content []byte) {
r := sha256.Sum256(content)
h := base64.URLEncoding.EncodeToString(r[:])
d := baseDir + "/" + subDir
if err := os.MkdirAll(d, 0777); err != nil {
log.Fatalf("Can't create directories %q: %v", d, err)
}
fn := d + "/" + h
f, err := os.Create(fn)
if err != nil {
log.Fatalf("Can't create %q: %s", fn, err)
}
defer func() {
if err := f.Close(); err != nil {
log.Fatalf("Can't close file: %v", err)
}
}()
if _, err := f.Write(content); err != nil {
log.Fatalf("Can't write to %q: %v", fn, err)
}
}
func logStringErrors(wg *sync.WaitGroup, errors chan *fixchain.FixError, baseDir string) {
defer wg.Done()
for err := range errors {
contentStore(baseDir, err.TypeString(), []byte(err.String()))
}
}
func main() {
ctx := context.Background()
logURL := os.Args[1]
chainsFile := os.Args[2]
errDir := os.Args[3]
var wg sync.WaitGroup
wg.Add(1)
errors := make(chan *fixchain.FixError)
// Functions to log errors as strings or as JSON are provided.
// As-is, this will log errors as strings.
go logStringErrors(&wg, errors, errDir)
limiter := rate.NewLimiter(rate.Limit(1000), 1)
c := &http.Client{}
logClient, err := client.New(logURL, c, jsonclient.Options{UserAgent: "ct-go-fixchain/1.0"})
if err != nil {
log.Fatalf("failed to create log client: %v", err)
}
fl := fixchain.NewFixAndLog(ctx, 100, 100, errors, c, logClient, limiter, true)
processChains(chainsFile, fl)
log.Printf("Wait for fixers and loggers")
fl.Wait()
close(errors)
log.Printf("Wait for errors")
wg.Wait()
}
|
