aboutsummaryrefslogtreecommitdiff
path: root/client/add-entry/main.go
blob: 693aca8222257d7e5a0d2da2a8acf95fb5e73e82 (plain)
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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
package main

import (
	"context"
	"flag"
	"fmt"

	"crypto/ed25519"
	"crypto/x509"
	"encoding/base64"
	"encoding/json"
	"encoding/pem"
	"io/ioutil"
	"net/http"

	"github.com/golang/glog"
	"github.com/system-transparency/stfe/client"
	"github.com/system-transparency/stfe/server/descriptor"
)

var (
	operators = flag.String("operators", "../../server/descriptor/stfe.json", "path to json-encoded list of log operators")
	logId     = flag.String("log_id", "B9oCJk4XIOMXba8dBM5yUj+NLtqTE6xHwbvR9dYkHPM=", "base64-encoded log identifier")
	chain     = flag.String("chain", "../../server/testdata/chain/ee.pem", "path to pem-encoded certificate chain that the log accepts")
	key       = flag.String("key", "../../server/testdata/chain/ee.key", "path to ed25519 private key that corresponds to the chain's end-entity certificate")
	name      = flag.String("name", "foobar-1.2.3", "package name")
	checksum  = flag.String("checksum", "50e7967bce266a506f8f614bb5096beba580d205046b918f47d23b2ec626d75e", "base64-encoded package checksum")
)

func main() {
	flag.Parse()

	client, err := setup()
	if err != nil {
		glog.Fatal(err)
	}

	pname, psum, err := params()
	if err != nil {
		glog.Fatal(err)
	}

	sdi, err := client.AddEntry(context.Background(), pname, psum)
	if err != nil {
		glog.Fatalf("add-entry failed: %v", err)
	}
	glog.Infof("got valid StItem: %v", sdi)
	glog.Flush()
}

func params() ([]byte, []byte, error) {
	b, err := base64.StdEncoding.DecodeString(*checksum)
	if err != nil {
		return nil, nil, fmt.Errorf("failed decoding checksum: %v", err)
	}
	return []byte(*name), b, nil
}

func setup() (*client.Client, error) {
	blob, err := ioutil.ReadFile(*chain)
	if err != nil {
		return nil, fmt.Errorf("failed reading certificate chain: %v", err)
	}
	c, err := parseChain(blob)
	if err != nil {
		return nil, fmt.Errorf("failed loading certificate chain: %v", err)
	}

	blob, err = ioutil.ReadFile(*key)
	if err != nil {
		return nil, fmt.Errorf("failed reading ed25519 private key: %v", err)
	}
	k, err := parseEd25519PrivateKey(blob)
	if err != nil {
		return nil, fmt.Errorf("failed decoding ed25519 private key: %v", err)
	}

	blob, err = ioutil.ReadFile(*operators)
	if err != nil {
		return nil, fmt.Errorf("failed reading log operators: %v", err)
	}
	var ops []descriptor.Operator
	if err := json.Unmarshal(blob, &ops); err != nil {
		return nil, fmt.Errorf("failed decoding log operators: %v", err)
	}

	id, err := base64.StdEncoding.DecodeString(*logId)
	if err != nil {
		return nil, fmt.Errorf("failed decoding log identifier: %v", err)
	}

	// TODO: define FindLog() for []Operator
	var log *descriptor.Log
	for _, op := range ops {
		l, err := op.FindLog(id)
		if err == nil {
			log = l
			break
		}
	}
	if log == nil {
		return nil, fmt.Errorf("unknown log identifier: %v", err)
	}
	return client.NewClient(log, &http.Client{}, c, &k), nil
}

func parseEd25519PrivateKey(data []byte) (ed25519.PrivateKey, error) {
	block, rest := pem.Decode(data)
	if block == nil {
		return nil, fmt.Errorf("pem block: is empty")
	}
	if block.Type != "PRIVATE KEY" {
		return nil, fmt.Errorf("bad pem block type: %v", block.Type)
	}
	if len(rest) != 0 {
		return nil, fmt.Errorf("pem block: trailing data")
	}

	key, err := x509.ParsePKCS8PrivateKey(block.Bytes)
	if err != nil {
		fmt.Errorf("x509 parser failed: %v", err)
	}
	switch t := key.(type) {
	case ed25519.PrivateKey:
		return key.(ed25519.PrivateKey), nil
	default:
		return nil, fmt.Errorf("unexpected signing key type: %v", t)
	}
}

func parseChain(rest []byte) ([]*x509.Certificate, error) {
	var chain []*x509.Certificate
	for len(rest) > 0 {
		var block *pem.Block
		block, rest = pem.Decode(rest)
		if block == nil {
			break
		}
		if block.Type != "CERTIFICATE" {
			return nil, fmt.Errorf("unexpected pem block type: %v", block.Type)
		}

		certificate, err := x509.ParseCertificate(block.Bytes)
		if err != nil {
			return nil, fmt.Errorf("failed parsing x509 certificate: %v", err)
		}
		chain = append(chain, certificate)
	}
	return chain, nil
}