-
Notifications
You must be signed in to change notification settings - Fork 1.1k
/
local.go
680 lines (602 loc) · 21.8 KB
/
local.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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
// Package local implements certificate signature functionality for CFSSL.
package local
import (
"bytes"
"crypto"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/x509"
"crypto/x509/pkix"
"database/sql"
"encoding/asn1"
"encoding/hex"
"encoding/pem"
"errors"
"fmt"
"io"
"math/big"
"net"
"net/http"
"net/mail"
"net/url"
"os"
"time"
"github.com/cloudflare/cfssl/certdb"
"github.com/cloudflare/cfssl/config"
cferr "github.com/cloudflare/cfssl/errors"
"github.com/cloudflare/cfssl/helpers"
"github.com/cloudflare/cfssl/info"
"github.com/cloudflare/cfssl/log"
"github.com/cloudflare/cfssl/signer"
ct "github.com/google/certificate-transparency-go"
"github.com/google/certificate-transparency-go/client"
"github.com/google/certificate-transparency-go/jsonclient"
zx509 "github.com/zmap/zcrypto/x509"
"github.com/zmap/zlint/v3"
"github.com/zmap/zlint/v3/lint"
"golang.org/x/net/context"
)
// Signer contains a signer that uses the standard library to
// support both ECDSA and RSA CA keys.
type Signer struct {
ca *x509.Certificate
priv crypto.Signer
// lintPriv is generated randomly when pre-issuance linting is configured and
// used to sign TBSCertificates for linting.
lintPriv crypto.Signer
policy *config.Signing
sigAlgo x509.SignatureAlgorithm
dbAccessor certdb.Accessor
}
// NewSigner creates a new Signer directly from a
// private key and certificate, with optional policy.
func NewSigner(priv crypto.Signer, cert *x509.Certificate, sigAlgo x509.SignatureAlgorithm, policy *config.Signing) (*Signer, error) {
if policy == nil {
policy = &config.Signing{
Profiles: map[string]*config.SigningProfile{},
Default: config.DefaultConfig()}
}
if !policy.Valid() {
return nil, cferr.New(cferr.PolicyError, cferr.InvalidPolicy)
}
var lintPriv crypto.Signer
// If there is at least one profile (including the default) that configures
// pre-issuance linting then generate the one-off lintPriv key.
for _, profile := range policy.Profiles {
if profile.LintErrLevel > 0 || policy.Default.LintErrLevel > 0 {
// In the future there may be demand for specifying the type of signer used
// for pre-issuance linting in configuration. For now we assume that signing
// with a randomly generated P-256 ECDSA private key is acceptable for all cases
// where linting is requested.
k, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
return nil, cferr.New(cferr.PrivateKeyError, cferr.GenerationFailed)
}
lintPriv = k
break
}
}
return &Signer{
ca: cert,
priv: priv,
lintPriv: lintPriv,
sigAlgo: sigAlgo,
policy: policy,
}, nil
}
// NewSignerFromFile generates a new local signer from a caFile
// and a caKey file, both PEM encoded.
func NewSignerFromFile(caFile, caKeyFile string, policy *config.Signing) (*Signer, error) {
log.Debug("Loading CA: ", caFile)
ca, err := helpers.ReadBytes(caFile)
if err != nil {
return nil, err
}
log.Debug("Loading CA key: ", caKeyFile)
cakey, err := helpers.ReadBytes(caKeyFile)
if err != nil {
return nil, cferr.Wrap(cferr.CertificateError, cferr.ReadFailed, err)
}
parsedCa, err := helpers.ParseCertificatePEM(ca)
if err != nil {
return nil, err
}
strPassword := os.Getenv("CFSSL_CA_PK_PASSWORD")
password := []byte(strPassword)
if strPassword == "" {
password = nil
}
priv, err := helpers.ParsePrivateKeyPEMWithPassword(cakey, password)
if err != nil {
log.Debugf("Malformed private key %v", err)
return nil, err
}
return NewSigner(priv, parsedCa, signer.DefaultSigAlgo(priv), policy)
}
// LintError is an error type returned when pre-issuance linting is configured
// in a signing profile and a TBS Certificate fails linting. It wraps the
// concrete zlint LintResults so that callers can further inspect the cause of
// the failing lints.
type LintError struct {
ErrorResults map[string]lint.LintResult
}
func (e *LintError) Error() string {
return fmt.Sprintf("pre-issuance linting found %d error results",
len(e.ErrorResults))
}
// lint performs pre-issuance linting of a given TBS certificate template when
// the provided errLevel is > 0. Note that the template is provided by-value and
// not by-reference. This is important as the lint function needs to mutate the
// template's signature algorithm to match the lintPriv.
func (s *Signer) lint(template x509.Certificate, errLevel lint.LintStatus, lintRegistry lint.Registry) error {
// Always return nil when linting is disabled (lint.Reserved == 0).
if errLevel == lint.Reserved {
return nil
}
// without a lintPriv key to use to sign the tbsCertificate we can't lint it.
if s.lintPriv == nil {
return cferr.New(cferr.PrivateKeyError, cferr.Unavailable)
}
// The template's SignatureAlgorithm must be mutated to match the lintPriv or
// x509.CreateCertificate will error because of the mismatch. At the time of
// writing s.lintPriv is always an ECDSA private key. This switch will need to
// be expanded if the lint key type is made configurable.
switch s.lintPriv.(type) {
case *ecdsa.PrivateKey:
template.SignatureAlgorithm = x509.ECDSAWithSHA256
default:
return cferr.New(cferr.PrivateKeyError, cferr.KeyMismatch)
}
prelintBytes, err := x509.CreateCertificate(rand.Reader, &template, s.ca, template.PublicKey, s.lintPriv)
if err != nil {
return cferr.Wrap(cferr.CertificateError, cferr.Unknown, err)
}
prelintCert, err := zx509.ParseCertificate(prelintBytes)
if err != nil {
return cferr.Wrap(cferr.CertificateError, cferr.ParseFailed, err)
}
errorResults := map[string]lint.LintResult{}
results := zlint.LintCertificateEx(prelintCert, lintRegistry)
for name, res := range results.Results {
if res.Status > errLevel {
errorResults[name] = *res
}
}
if len(errorResults) > 0 {
return &LintError{
ErrorResults: errorResults,
}
}
return nil
}
func (s *Signer) sign(template *x509.Certificate, lintErrLevel lint.LintStatus, lintRegistry lint.Registry) (cert []byte, err error) {
var initRoot bool
if s.ca == nil {
if !template.IsCA {
err = cferr.New(cferr.PolicyError, cferr.InvalidRequest)
return
}
template.DNSNames = nil
template.EmailAddresses = nil
template.URIs = nil
s.ca = template
initRoot = true
}
if err := s.lint(*template, lintErrLevel, lintRegistry); err != nil {
return nil, err
}
derBytes, err := x509.CreateCertificate(rand.Reader, template, s.ca, template.PublicKey, s.priv)
if err != nil {
return nil, cferr.Wrap(cferr.CertificateError, cferr.Unknown, err)
}
if initRoot {
s.ca, err = x509.ParseCertificate(derBytes)
if err != nil {
return nil, cferr.Wrap(cferr.CertificateError, cferr.ParseFailed, err)
}
}
cert = pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
log.Infof("signed certificate with serial number %d", template.SerialNumber)
return
}
// replaceSliceIfEmpty replaces the contents of replaced with newContents if
// the slice referenced by replaced is empty
func replaceSliceIfEmpty(replaced, newContents *[]string) {
if len(*replaced) == 0 {
*replaced = *newContents
}
}
// PopulateSubjectFromCSR has functionality similar to Name, except
// it fills the fields of the resulting pkix.Name with req's if the
// subject's corresponding fields are empty
func PopulateSubjectFromCSR(s *signer.Subject, req pkix.Name) pkix.Name {
// if no subject, use req
if s == nil {
return req
}
name := s.Name()
if name.CommonName == "" {
name.CommonName = req.CommonName
}
replaceSliceIfEmpty(&name.Country, &req.Country)
replaceSliceIfEmpty(&name.Province, &req.Province)
replaceSliceIfEmpty(&name.Locality, &req.Locality)
replaceSliceIfEmpty(&name.Organization, &req.Organization)
replaceSliceIfEmpty(&name.OrganizationalUnit, &req.OrganizationalUnit)
if name.SerialNumber == "" {
name.SerialNumber = req.SerialNumber
}
return name
}
// OverrideHosts fills template's IPAddresses, EmailAddresses, DNSNames, and URIs with the
// content of hosts, if it is not nil.
func OverrideHosts(template *x509.Certificate, hosts []string) {
if hosts != nil {
template.IPAddresses = []net.IP{}
template.EmailAddresses = []string{}
template.DNSNames = []string{}
template.URIs = []*url.URL{}
}
for i := range hosts {
if ip := net.ParseIP(hosts[i]); ip != nil {
template.IPAddresses = append(template.IPAddresses, ip)
} else if email, err := mail.ParseAddress(hosts[i]); err == nil && email != nil {
template.EmailAddresses = append(template.EmailAddresses, email.Address)
} else if uri, err := url.ParseRequestURI(hosts[i]); err == nil && uri != nil {
template.URIs = append(template.URIs, uri)
} else {
template.DNSNames = append(template.DNSNames, hosts[i])
}
}
}
// Sign signs a new certificate based on the PEM-encoded client
// certificate or certificate request with the signing profile,
// specified by profileName.
func (s *Signer) Sign(req signer.SignRequest) (cert []byte, err error) {
profile, err := signer.Profile(s, req.Profile)
if err != nil {
return
}
block, _ := pem.Decode([]byte(req.Request))
if block == nil {
return nil, cferr.New(cferr.CSRError, cferr.DecodeFailed)
}
if block.Type != "NEW CERTIFICATE REQUEST" && block.Type != "CERTIFICATE REQUEST" {
return nil, cferr.Wrap(cferr.CSRError,
cferr.BadRequest, errors.New("not a csr"))
}
csrTemplate, err := signer.ParseCertificateRequest(s, profile, block.Bytes)
if err != nil {
return nil, err
}
// Copy out only the fields from the CSR authorized by policy.
safeTemplate := x509.Certificate{}
// If the profile contains no explicit whitelist, assume that all fields
// should be copied from the CSR.
if profile.CSRWhitelist == nil {
safeTemplate = *csrTemplate
} else {
if profile.CSRWhitelist.Subject {
safeTemplate.Subject = csrTemplate.Subject
}
if profile.CSRWhitelist.PublicKeyAlgorithm {
safeTemplate.PublicKeyAlgorithm = csrTemplate.PublicKeyAlgorithm
}
if profile.CSRWhitelist.PublicKey {
safeTemplate.PublicKey = csrTemplate.PublicKey
}
if profile.CSRWhitelist.SignatureAlgorithm {
safeTemplate.SignatureAlgorithm = csrTemplate.SignatureAlgorithm
}
if profile.CSRWhitelist.DNSNames {
safeTemplate.DNSNames = csrTemplate.DNSNames
}
if profile.CSRWhitelist.IPAddresses {
safeTemplate.IPAddresses = csrTemplate.IPAddresses
}
if profile.CSRWhitelist.EmailAddresses {
safeTemplate.EmailAddresses = csrTemplate.EmailAddresses
}
if profile.CSRWhitelist.URIs {
safeTemplate.URIs = csrTemplate.URIs
}
}
if req.CRLOverride != "" {
safeTemplate.CRLDistributionPoints = []string{req.CRLOverride}
}
if safeTemplate.IsCA {
if !profile.CAConstraint.IsCA {
log.Error("local signer policy disallows issuing CA certificate")
return nil, cferr.New(cferr.PolicyError, cferr.InvalidRequest)
}
if s.ca != nil && s.ca.MaxPathLen > 0 {
if safeTemplate.MaxPathLen >= s.ca.MaxPathLen {
log.Error("local signer certificate disallows CA MaxPathLen extending")
// do not sign a cert with pathlen > current
return nil, cferr.New(cferr.PolicyError, cferr.InvalidRequest)
}
} else if s.ca != nil && s.ca.MaxPathLen == 0 && s.ca.MaxPathLenZero {
log.Error("local signer certificate disallows issuing CA certificate")
// signer has pathlen of 0, do not sign more intermediate CAs
return nil, cferr.New(cferr.PolicyError, cferr.InvalidRequest)
}
}
OverrideHosts(&safeTemplate, req.Hosts)
safeTemplate.Subject = PopulateSubjectFromCSR(req.Subject, safeTemplate.Subject)
// If there is a whitelist, ensure that both the Common Name and SAN DNSNames match
if profile.NameWhitelist != nil {
if safeTemplate.Subject.CommonName != "" {
if profile.NameWhitelist.Find([]byte(safeTemplate.Subject.CommonName)) == nil {
return nil, cferr.New(cferr.PolicyError, cferr.UnmatchedWhitelist)
}
}
for _, name := range safeTemplate.DNSNames {
if profile.NameWhitelist.Find([]byte(name)) == nil {
return nil, cferr.New(cferr.PolicyError, cferr.UnmatchedWhitelist)
}
}
for _, name := range safeTemplate.EmailAddresses {
if profile.NameWhitelist.Find([]byte(name)) == nil {
return nil, cferr.New(cferr.PolicyError, cferr.UnmatchedWhitelist)
}
}
for _, name := range safeTemplate.URIs {
if profile.NameWhitelist.Find([]byte(name.String())) == nil {
return nil, cferr.New(cferr.PolicyError, cferr.UnmatchedWhitelist)
}
}
}
if profile.ClientProvidesSerialNumbers {
if req.Serial == nil {
return nil, cferr.New(cferr.CertificateError, cferr.MissingSerial)
}
safeTemplate.SerialNumber = req.Serial
} else {
// RFC 5280 4.1.2.2:
// Certificate users MUST be able to handle serialNumber
// values up to 20 octets. Conforming CAs MUST NOT use
// serialNumber values longer than 20 octets.
//
// If CFSSL is providing the serial numbers, it makes
// sense to use the max supported size.
serialNumber := make([]byte, 20)
_, err = io.ReadFull(rand.Reader, serialNumber)
if err != nil {
return nil, cferr.Wrap(cferr.CertificateError, cferr.Unknown, err)
}
// SetBytes interprets buf as the bytes of a big-endian
// unsigned integer. The leading byte should be masked
// off to ensure it isn't negative.
serialNumber[0] &= 0x7F
safeTemplate.SerialNumber = new(big.Int).SetBytes(serialNumber)
}
if len(req.Extensions) > 0 {
for _, ext := range req.Extensions {
oid := asn1.ObjectIdentifier(ext.ID)
if !profile.ExtensionWhitelist[oid.String()] {
return nil, cferr.New(cferr.CertificateError, cferr.InvalidRequest)
}
rawValue, err := hex.DecodeString(ext.Value)
if err != nil {
return nil, cferr.Wrap(cferr.CertificateError, cferr.InvalidRequest, err)
}
safeTemplate.ExtraExtensions = append(safeTemplate.ExtraExtensions, pkix.Extension{
Id: oid,
Critical: ext.Critical,
Value: rawValue,
})
}
}
var distPoints = safeTemplate.CRLDistributionPoints
err = signer.FillTemplate(&safeTemplate, s.policy.Default, profile, req.NotBefore, req.NotAfter)
if err != nil {
return nil, err
}
if distPoints != nil && len(distPoints) > 0 {
safeTemplate.CRLDistributionPoints = distPoints
}
var certTBS = safeTemplate
if len(profile.CTLogServers) > 0 || req.ReturnPrecert {
// Add a poison extension which prevents validation
var poisonExtension = pkix.Extension{Id: signer.CTPoisonOID, Critical: true, Value: []byte{0x05, 0x00}}
var poisonedPreCert = certTBS
poisonedPreCert.ExtraExtensions = append(safeTemplate.ExtraExtensions, poisonExtension)
cert, err = s.sign(&poisonedPreCert, profile.LintErrLevel, profile.LintRegistry)
if err != nil {
return
}
if req.ReturnPrecert {
return cert, nil
}
derCert, _ := pem.Decode(cert)
prechain := []ct.ASN1Cert{{Data: derCert.Bytes}, {Data: s.ca.Raw}}
var sctList []ct.SignedCertificateTimestamp
for _, server := range profile.CTLogServers {
log.Infof("submitting poisoned precertificate to %s", server)
ctclient, err := client.New(server, nil, jsonclient.Options{})
if err != nil {
return nil, cferr.Wrap(cferr.CTError, cferr.PrecertSubmissionFailed, err)
}
var resp *ct.SignedCertificateTimestamp
ctx := context.Background()
resp, err = ctclient.AddPreChain(ctx, prechain)
if err != nil {
return nil, cferr.Wrap(cferr.CTError, cferr.PrecertSubmissionFailed, err)
}
sctList = append(sctList, *resp)
}
var serializedSCTList []byte
serializedSCTList, err = helpers.SerializeSCTList(sctList)
if err != nil {
return nil, cferr.Wrap(cferr.CTError, cferr.Unknown, err)
}
// Serialize again as an octet string before embedding
serializedSCTList, err = asn1.Marshal(serializedSCTList)
if err != nil {
return nil, cferr.Wrap(cferr.CTError, cferr.Unknown, err)
}
var SCTListExtension = pkix.Extension{Id: signer.SCTListOID, Critical: false, Value: serializedSCTList}
certTBS.ExtraExtensions = append(certTBS.ExtraExtensions, SCTListExtension)
}
var signedCert []byte
signedCert, err = s.sign(&certTBS, profile.LintErrLevel, profile.LintRegistry)
if err != nil {
return nil, err
}
// Get the AKI from signedCert. This is required to support Go 1.9+.
// In prior versions of Go, x509.CreateCertificate updated the
// AuthorityKeyId of certTBS.
parsedCert, _ := helpers.ParseCertificatePEM(signedCert)
if s.dbAccessor != nil {
now := time.Now()
var certRecord = certdb.CertificateRecord{
Serial: certTBS.SerialNumber.String(),
// this relies on the specific behavior of x509.CreateCertificate
// which sets the AuthorityKeyId from the signer's SubjectKeyId
AKI: hex.EncodeToString(parsedCert.AuthorityKeyId),
CALabel: req.Label,
Status: "good",
Expiry: certTBS.NotAfter,
PEM: string(signedCert),
IssuedAt: &now,
NotBefore: &certTBS.NotBefore,
CommonName: sql.NullString{String: certTBS.Subject.CommonName, Valid: true},
}
if err := certRecord.SetMetadata(req.Metadata); err != nil {
return nil, err
}
if err := certRecord.SetSANs(certTBS.DNSNames); err != nil {
return nil, err
}
if err := s.dbAccessor.InsertCertificate(certRecord); err != nil {
return nil, err
}
log.Debug("saved certificate with serial number ", certTBS.SerialNumber)
}
return signedCert, nil
}
// SignFromPrecert creates and signs a certificate from an existing precertificate
// that was previously signed by Signer.ca and inserts the provided SCTs into the
// new certificate. The resulting certificate will be a exact copy of the precert
// except for the removal of the poison extension and the addition of the SCT list
// extension. SignFromPrecert does not verify that the contents of the certificate
// still match the signing profile of the signer, it only requires that the precert
// was previously signed by the Signers CA. Similarly, any linting configured
// by the profile used to sign the precert will not be re-applied to the final
// cert and must be done separately by the caller.
func (s *Signer) SignFromPrecert(precert *x509.Certificate, scts []ct.SignedCertificateTimestamp) ([]byte, error) {
// Verify certificate was signed by s.ca
if err := precert.CheckSignatureFrom(s.ca); err != nil {
return nil, err
}
// Verify certificate is a precert
isPrecert := false
poisonIndex := 0
for i, ext := range precert.Extensions {
if ext.Id.Equal(signer.CTPoisonOID) {
if !ext.Critical {
return nil, cferr.New(cferr.CTError, cferr.PrecertInvalidPoison)
}
// Check extension contains ASN.1 NULL
if bytes.Compare(ext.Value, []byte{0x05, 0x00}) != 0 {
return nil, cferr.New(cferr.CTError, cferr.PrecertInvalidPoison)
}
isPrecert = true
poisonIndex = i
break
}
}
if !isPrecert {
return nil, cferr.New(cferr.CTError, cferr.PrecertMissingPoison)
}
// Serialize SCTs into list format and create extension
serializedList, err := helpers.SerializeSCTList(scts)
if err != nil {
return nil, err
}
// Serialize again as an octet string before embedding
serializedList, err = asn1.Marshal(serializedList)
if err != nil {
return nil, cferr.Wrap(cferr.CTError, cferr.Unknown, err)
}
sctExt := pkix.Extension{Id: signer.SCTListOID, Critical: false, Value: serializedList}
// Create the new tbsCert from precert. Do explicit copies of any slices so that we don't
// use memory that may be altered by us or the caller at a later stage.
tbsCert := x509.Certificate{
SignatureAlgorithm: precert.SignatureAlgorithm,
PublicKeyAlgorithm: precert.PublicKeyAlgorithm,
PublicKey: precert.PublicKey,
Version: precert.Version,
SerialNumber: precert.SerialNumber,
Issuer: precert.Issuer,
Subject: precert.Subject,
NotBefore: precert.NotBefore,
NotAfter: precert.NotAfter,
KeyUsage: precert.KeyUsage,
BasicConstraintsValid: precert.BasicConstraintsValid,
IsCA: precert.IsCA,
MaxPathLen: precert.MaxPathLen,
MaxPathLenZero: precert.MaxPathLenZero,
PermittedDNSDomainsCritical: precert.PermittedDNSDomainsCritical,
}
if len(precert.Extensions) > 0 {
tbsCert.ExtraExtensions = make([]pkix.Extension, len(precert.Extensions))
copy(tbsCert.ExtraExtensions, precert.Extensions)
}
// Remove the poison extension from ExtraExtensions
tbsCert.ExtraExtensions = append(tbsCert.ExtraExtensions[:poisonIndex], tbsCert.ExtraExtensions[poisonIndex+1:]...)
// Insert the SCT list extension
tbsCert.ExtraExtensions = append(tbsCert.ExtraExtensions, sctExt)
// Sign the tbsCert. Linting is always disabled because there is no way for
// this API to know the correct lint settings to use because there is no
// reference to the signing profile of the precert available.
return s.sign(&tbsCert, 0, nil)
}
// Info return a populated info.Resp struct or an error.
func (s *Signer) Info(req info.Req) (resp *info.Resp, err error) {
cert, err := s.Certificate(req.Label, req.Profile)
if err != nil {
return
}
profile, err := signer.Profile(s, req.Profile)
if err != nil {
return
}
resp = new(info.Resp)
if cert.Raw != nil {
resp.Certificate = string(bytes.TrimSpace(pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: cert.Raw})))
}
resp.Usage = profile.Usage
resp.ExpiryString = profile.ExpiryString
return
}
// SigAlgo returns the RSA signer's signature algorithm.
func (s *Signer) SigAlgo() x509.SignatureAlgorithm {
return s.sigAlgo
}
// Certificate returns the signer's certificate.
func (s *Signer) Certificate(label, profile string) (*x509.Certificate, error) {
cert := *s.ca
return &cert, nil
}
// SetPolicy sets the signer's signature policy.
func (s *Signer) SetPolicy(policy *config.Signing) {
s.policy = policy
}
// SetDBAccessor sets the signers' cert db accessor
func (s *Signer) SetDBAccessor(dba certdb.Accessor) {
s.dbAccessor = dba
}
// GetDBAccessor returns the signers' cert db accessor
func (s *Signer) GetDBAccessor() certdb.Accessor {
return s.dbAccessor
}
// SetReqModifier does nothing for local
func (s *Signer) SetReqModifier(func(*http.Request, []byte)) {
// noop
}
// Policy returns the signer's policy.
func (s *Signer) Policy() *config.Signing {
return s.policy
}