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
|
package main
import (
"flag"
"fmt"
"log"
"math/big"
"net/http"
"regexp"
"time"
"encoding/base64"
"github.com/google/certificate-transparency/go"
"github.com/google/certificate-transparency/go/client"
"github.com/google/certificate-transparency/go/scanner"
"github.com/mreiferson/go-httpclient"
)
const (
// A regex which cannot match any input
MatchesNothingRegex = "a^"
)
var logUri = flag.String("log_uri", "http://ct.googleapis.com/aviator", "CT log base URI")
var matchSubjectRegex = flag.String("match_subject_regex", ".*", "Regex to match CN/SAN")
var matchIssuerRegex = flag.String("match_issuer_regex", "", "Regex to match in issuer CN")
var precertsOnly = flag.Bool("precerts_only", false, "Only match precerts")
var serialNumber = flag.String("serial_number", "", "Serial number of certificate of interest")
var batchSize = flag.Int("batch_size", 1000, "Max number of entries to request at per call to get-entries")
var numWorkers = flag.Int("num_workers", 2, "Number of concurrent matchers")
var parallelFetch = flag.Int("parallel_fetch", 2, "Number of concurrent GetEntries fetches")
var startIndex = flag.Int64("start_index", 0, "Log index to start scanning at")
var quiet = flag.Bool("quiet", false, "Don't print out extra logging messages, only matches.")
var printChains = flag.Bool("print_chains", false, "If true prints the whole chain rather than a summary")
// Prints out a short bit of info about |cert|, found at |index| in the
// specified log
func logCertInfo(entry *ct.LogEntry) {
log.Printf("Interesting cert at index %d: CN: '%s'", entry.Index, entry.X509Cert.Subject.CommonName)
}
// Prints out a short bit of info about |precert|, found at |index| in the
// specified log
func logPrecertInfo(entry *ct.LogEntry) {
log.Printf("Interesting precert at index %d: CN: '%s' Issuer: %s", entry.Index,
entry.Precert.TBSCertificate.Subject.CommonName, entry.Precert.TBSCertificate.Issuer.CommonName)
}
func chainToString(certs []ct.ASN1Cert) string {
var output []byte
for _, cert := range certs {
output = append(output, cert...)
}
return base64.StdEncoding.EncodeToString(output)
}
func logFullChain(entry *ct.LogEntry) {
log.Printf("Index %d: Chain: %s", entry.Index, chainToString(entry.Chain))
}
func createRegexes(regexValue string) (*regexp.Regexp, *regexp.Regexp) {
// Make a regex matcher
var certRegex *regexp.Regexp
precertRegex := regexp.MustCompile(regexValue)
switch *precertsOnly {
case true:
certRegex = regexp.MustCompile(MatchesNothingRegex)
case false:
certRegex = precertRegex
}
return certRegex, precertRegex
}
func createMatcherFromFlags() (scanner.Matcher, error) {
if *matchIssuerRegex != "" {
certRegex, precertRegex := createRegexes(*matchIssuerRegex)
return scanner.MatchIssuerRegex{
CertificateIssuerRegex: certRegex,
PrecertificateIssuerRegex: precertRegex}, nil
}
if *serialNumber != "" {
log.Printf("Using SerialNumber matcher on %s", *serialNumber)
var sn big.Int
_, success := sn.SetString(*serialNumber, 0)
if !success {
return nil, fmt.Errorf("Invalid serialNumber %s", *serialNumber)
}
return scanner.MatchSerialNumber{SerialNumber: sn}, nil
} else {
certRegex, precertRegex := createRegexes(*matchSubjectRegex)
return scanner.MatchSubjectRegex{
CertificateSubjectRegex: certRegex,
PrecertificateSubjectRegex: precertRegex}, nil
}
}
func main() {
flag.Parse()
logClient := client.New(*logUri, &http.Client{
Transport: &httpclient.Transport{
ConnectTimeout: 10 * time.Second,
RequestTimeout: 30 * time.Second,
ResponseHeaderTimeout: 30 * time.Second,
MaxIdleConnsPerHost: 10,
DisableKeepAlives: false,
},
})
matcher, err := createMatcherFromFlags()
if err != nil {
log.Fatal(err)
}
opts := scanner.ScannerOptions{
Matcher: matcher,
BatchSize: *batchSize,
NumWorkers: *numWorkers,
ParallelFetch: *parallelFetch,
StartIndex: *startIndex,
Quiet: *quiet,
}
scanner := scanner.NewScanner(logClient, opts)
if *printChains {
scanner.Scan(logFullChain, logFullChain)
} else {
scanner.Scan(logCertInfo, logPrecertInfo)
}
}
|
