-
Notifications
You must be signed in to change notification settings - Fork 0
/
bootstrap.go
175 lines (148 loc) · 6.14 KB
/
bootstrap.go
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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
package certdepot
import (
"context"
"github.com/pkg/errors"
"github.com/square/certstrap/depot"
"go.mongodb.org/mongo-driver/mongo"
)
// BootstrapDepotConfig contains options for BootstrapDepot. Must provide
// either the name of the FileDepot or the MongoDepot options, not both or
// neither.
type BootstrapDepotConfig struct {
// Name of FileDepot (directory). If a MongoDepot is desired, leave
// empty.
FileDepot string `bson:"file_depot,omitempty" json:"file_depot,omitempty" yaml:"file_depot,omitempty"`
// Options for setting up a MongoDepot. If a FileDepot is desired,
// leave pointer nil or the struct empty.
MongoDepot *MongoDBOptions `bson:"mongo_depot,omitempty" json:"mongo_depot,omitempty" yaml:"mongo_depot,omitempty"`
// CA certificate, this is optional unless CAKey is not empty, in
// which case a CA certificate must also be provided.
CACert string `bson:"ca_cert" json:"ca_cert" yaml:"ca_cert"`
// CA key, this is optional unless CACert is not empty, in which case
// a CA key must also be provided.
CAKey string `bson:"ca_key" json:"ca_key" yaml:"ca_key"`
// Common name of the CA (required).
CAName string `bson:"ca_name" json:"ca_name" yaml:"ca_name"`
// Common name of the service (required).
ServiceName string `bson:"service_name" json:"service_name" yaml:"service_name"`
// Options to initialize a CA. This is optional and only used if there
// is no existing `CAName` in the depot and `CACert` is empty.
// `CAOpts.CommonName` must equal `CAName`.
CAOpts *CertificateOptions `bson:"ca_opts,omitempty" json:"ca_opts,omitempty" yaml:"ca_opts,omitempty"`
// Options to create a service certificate. This is optional and only
// used if there is no existing `ServiceName` in the depot.
// `ServiceOpts.CommonName` must equal `ServiceName`.
// `ServiceOpts.CA` must equal `CAName`.
ServiceOpts *CertificateOptions `bson:"service_opts,omitempty" json:"service_opts,omitempty" yaml:"service_opts,omitempty"`
}
// Validate ensures that the BootstrapDepotConfig is configured correctly.
func (c *BootstrapDepotConfig) Validate() error {
if c.FileDepot != "" && c.MongoDepot != nil && !c.MongoDepot.IsZero() {
return errors.New("cannot specify more than one depot configuration")
}
if c.FileDepot == "" && (c.MongoDepot == nil || c.MongoDepot.IsZero()) {
return errors.New("must specify one depot configuration")
}
if c.CAName == "" || c.ServiceName == "" {
return errors.New("must specify the name of the CA and service")
}
if (c.CACert != "" && c.CAKey == "") || (c.CACert == "" && c.CAKey != "") {
return errors.New("must provide both cert and key file if want to bootstrap with existing CA")
}
if c.CAOpts != nil && c.CAOpts.CommonName != c.CAName {
return errors.New("CAName and CAOpts.CommonName must be the same")
}
if c.ServiceOpts != nil && c.ServiceOpts.CommonName != c.ServiceName {
return errors.New("ServiceName and ServiceOpts.CommonName must be the same")
}
if c.ServiceOpts != nil && c.ServiceOpts.CA != c.CAName {
return errors.New("CAName and ServiceOpts.CA must be the same")
}
return nil
}
// BootstrapDepot creates a certificate depot with a CA and service
// certificate.
func BootstrapDepot(ctx context.Context, conf BootstrapDepotConfig) (Depot, error) {
return BootstrapDepotWithMongoClient(ctx, nil, conf)
}
// BootstrapDepotWithMongoClient creates a certificate depot with a CA and
// service certificate using the provided mongo driver client.
func BootstrapDepotWithMongoClient(ctx context.Context, client *mongo.Client, conf BootstrapDepotConfig) (Depot, error) {
d, err := CreateDepot(ctx, client, conf)
if err != nil {
return nil, errors.Wrap(err, "problem creating depot")
}
if conf.CACert != "" {
if err = addCert(d, conf); err != nil {
return nil, errors.Wrap(err, "problem adding a ca cert")
}
}
if !depot.CheckCertificate(d, conf.CAName) {
if err = createCA(d, conf); err != nil {
return nil, errors.Wrap(err, "problem during certificate creation")
}
} else if !depot.CheckCertificate(d, conf.ServiceName) {
if err = createServerCert(d, conf); err != nil {
return nil, errors.Wrap(err, "problem checking the service certificate")
}
}
return d, nil
}
// CreateDepot creates a certificate depot with the given BootstrapDepotConfig.
// If a mongo client is passed in it will be used to create the mongo depot.
func CreateDepot(ctx context.Context, client *mongo.Client, conf BootstrapDepotConfig) (Depot, error) {
var d Depot
var err error
if err = conf.Validate(); err != nil {
return nil, errors.Wrap(err, "invalid configuration")
}
if conf.FileDepot != "" {
d, err = NewFileDepot(conf.FileDepot)
if err != nil {
return nil, errors.Wrap(err, "problem initializing the file deopt")
}
} else if !conf.MongoDepot.IsZero() {
if client != nil {
d, err = NewMongoDBCertDepotWithClient(ctx, client, conf.MongoDepot)
} else {
d, err = NewMongoDBCertDepot(ctx, conf.MongoDepot)
}
if err != nil {
return nil, errors.Wrap(err, "problem initializing the mongo depot")
}
}
return d, nil
}
func addCert(d depot.Depot, conf BootstrapDepotConfig) error {
if err := d.Put(depot.CrtTag(conf.CAName), []byte(conf.CACert)); err != nil {
return errors.Wrap(err, "problem adding CA cert to depot")
}
if err := d.Put(depot.PrivKeyTag(conf.CAName), []byte(conf.CAKey)); err != nil {
return errors.Wrap(err, "problem adding CA key to depot")
}
return nil
}
func createCA(d depot.Depot, conf BootstrapDepotConfig) error {
if conf.CAOpts == nil {
return errors.New("cannot create a new CA with nil CA options")
}
if err := conf.CAOpts.Init(d); err != nil {
return errors.Wrap(err, "problem initializing the ca")
}
if err := createServerCert(d, conf); err != nil {
return errors.Wrap(err, "problem creating the server cert")
}
return nil
}
func createServerCert(d depot.Depot, conf BootstrapDepotConfig) error {
if conf.ServiceOpts == nil {
return errors.New("cannot create a new server cert with nil service options")
}
if err := conf.ServiceOpts.CertRequest(d); err != nil {
return errors.Wrap(err, "problem creating service cert request")
}
if err := conf.ServiceOpts.Sign(d); err != nil {
return errors.Wrap(err, "problem signing service key")
}
return nil
}