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
|
// Copyright 2018 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.
package core
import (
"errors"
"fmt"
"os"
"github.com/google/certificate-transparency-go/trillian/migrillian/configpb"
"google.golang.org/protobuf/encoding/prototext"
"google.golang.org/protobuf/proto"
)
// LoadConfigFromFile reads MigrillianConfig from the given filename, which
// should contain text-protobuf encoded configuration data.
func LoadConfigFromFile(filename string) (*configpb.MigrillianConfig, error) {
cfgBytes, err := os.ReadFile(filename)
if err != nil {
return nil, err
}
var cfg configpb.MigrillianConfig
if txtErr := prototext.Unmarshal(cfgBytes, &cfg); txtErr != nil {
if binErr := proto.Unmarshal(cfgBytes, &cfg); binErr != nil {
return nil, fmt.Errorf("failed to parse MigrillianConfig from %q as text protobuf (%v) or binary protobuf (%v)", filename, txtErr, binErr)
}
}
return &cfg, nil
}
// ValidateMigrationConfig verifies that the migration config is sane.
func ValidateMigrationConfig(cfg *configpb.MigrationConfig) error {
// TODO(pavelkalinnikov): Also try to parse the public key.
switch {
case len(cfg.SourceUri) == 0:
return errors.New("missing CT log URI")
case cfg.PublicKey == nil:
return errors.New("missing public key")
case cfg.LogId <= 0:
return errors.New("log ID must be positive")
case cfg.BatchSize <= 0:
return errors.New("batch size must be positive")
}
switch idFunc := cfg.IdentityFunction; idFunc {
case configpb.IdentityFunction_SHA256_CERT_DATA:
case configpb.IdentityFunction_SHA256_LEAF_INDEX:
default:
return fmt.Errorf("unknown identity function: %v", idFunc)
}
return nil
}
// ValidateConfig verifies that MigrillianConfig is correct. In particular:
// - Migration configs are valid (as per ValidateMigrationConfig).
// - Each migration config has a unique log ID.
func ValidateConfig(cfg *configpb.MigrillianConfig) error {
// Validate each MigrationConfig, and ensure that log IDs are unique.
logIDs := make(map[int64]bool)
for _, mc := range cfg.MigrationConfigs.Config {
if err := ValidateMigrationConfig(mc); err != nil {
return fmt.Errorf("MigrationConfig: %v: %v", err, mc)
}
if ok := logIDs[mc.LogId]; ok {
return fmt.Errorf("duplicate tree ID %d: %v", mc.LogId, mc)
}
logIDs[mc.LogId] = true
}
return nil
}
|
