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options: fix overlapping certificate test (#3492)

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Caleb Doxsey 2022-07-20 13:38:52 -06:00 • committed by GitHub
parent 250eff3e0a
commit 1afbc6e9c4
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 68 additions and 17 deletions
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36
config/options.go
View file

@ -1237,7 +1237,7 @@ func (o *Options) Checksum() uint64 {
return hashutil.MustHash(o)
}
func (o Options) indexCerts(ctx context.Context) certsIndex {
func (o *Options) indexCerts(ctx context.Context) certsIndex {
idx := make(certsIndex)
if o.CertFile != "" {
@ -1248,9 +1248,7 @@ func (o Options) indexCerts(ctx context.Context) certsIndex {
idx.addCert(cert)
}
} else if o.Cert != "" {
if data, err := base64.StdEncoding.DecodeString(o.Cert); err != nil {
log.Error(ctx).Err(err).Msg("bad base64 for local cert: skipped")
} else if cert, err := cryptutil.ParsePEMCertificate(data); err != nil {
if cert, err := cryptutil.ParsePEMCertificateFromBase64(o.Cert); err != nil {
log.Error(ctx).Err(err).Msg("parsing local cert: skipped")
} else {
idx.addCert(cert)
@ -1258,9 +1256,12 @@ func (o Options) indexCerts(ctx context.Context) certsIndex {
}
for _, c := range o.CertificateFiles {
cert, err := cryptutil.ParsePEMCertificateFromFile(c.CertFile)
cert, err := cryptutil.ParsePEMCertificateFromBase64(c.CertFile)
if err != nil {
log.Error(ctx).Err(err).Str("file", c.CertFile).Msg("parsing local cert: skipped")
cert, err = cryptutil.ParsePEMCertificateFromFile(c.CertFile)
}
if err != nil {
log.Error(ctx).Err(err).Msg("parsing local cert: skipped")
} else {
idx.addCert(cert)
}
@ -1271,15 +1272,6 @@ func (o Options) indexCerts(ctx context.Context) certsIndex {
func (o *Options) applyExternalCerts(ctx context.Context, certs []*config.Settings_Certificate) {
idx := o.indexCerts(ctx)
for _, c := range certs {
cert, err := cryptutil.ParsePEMCertificate(c.CertBytes)
if err != nil {
log.Error(ctx).Err(err).Msg("parsing cert from databroker: skipped")
continue
}
if overlaps, name := idx.matchCert(cert); overlaps {
log.Error(ctx).Err(err).Str("domain", name).Msg("overlaps with local certs: skipped")
continue
}
cfp := certificateFilePair{
CertFile: c.CertFile,
KeyFile: c.KeyFile,
@ -1290,6 +1282,20 @@ func (o *Options) applyExternalCerts(ctx context.Context, certs []*config.Settin
if cfp.KeyFile == "" {
cfp.KeyFile = base64.StdEncoding.EncodeToString(c.KeyBytes)
}
cert, err := cryptutil.ParsePEMCertificateFromBase64(cfp.CertFile)
if err != nil {
cert, err = cryptutil.ParsePEMCertificateFromFile(cfp.CertFile)
}
if err != nil {
log.Error(ctx).Err(err).Msg("parsing cert from databroker: skipped")
continue
}
if overlaps, name := idx.matchCert(cert); overlaps {
log.Error(ctx).Err(err).Str("domain", name).Msg("overlaps with local certs: skipped")
continue
}
o.CertificateFiles = append(o.CertificateFiles, cfp)
}
}

36
config/options_test.go
View file

@ -2,7 +2,9 @@ package config
import (
"context"
"crypto/tls"
"encoding/base64"
"encoding/pem"
"fmt"
"net/url"
"os"
@ -15,6 +17,9 @@ import (
"github.com/spf13/viper"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/pomerium/pomerium/pkg/cryptutil"
"github.com/pomerium/pomerium/pkg/grpc/config"
)
var cmpOptIgnoreUnexported = cmpopts.IgnoreUnexported(Options{}, Policy{})
@ -734,6 +739,37 @@ func TestOptions_GetAllRouteableHTTPDomains(t *testing.T) {
}, domains)
}
func TestOptions_ApplySettings(t *testing.T) {
ctx, clearTimeout := context.WithTimeout(context.Background(), time.Second)
defer clearTimeout()
t.Run("certificates", func(t *testing.T) {
options := NewDefaultOptions()
cert1, err := cryptutil.GenerateSelfSignedCertificate("example.com")
require.NoError(t, err)
options.CertificateFiles = append(options.CertificateFiles, certificateFilePair{
CertFile: base64.StdEncoding.EncodeToString(encodeCert(cert1)),
})
cert2, err := cryptutil.GenerateSelfSignedCertificate("example.com")
require.NoError(t, err)
cert3, err := cryptutil.GenerateSelfSignedCertificate("not.example.com")
require.NoError(t, err)
settings := &config.Settings{
Certificates: []*config.Settings_Certificate{
{CertBytes: encodeCert(cert2)},
{CertBytes: encodeCert(cert3)},
},
}
options.ApplySettings(ctx, settings)
assert.Len(t, options.CertificateFiles, 2, "should prevent adding duplicate certificates")
})
}
func encodeCert(cert *tls.Certificate) []byte {
return pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: cert.Certificate[0]})
}
func mustParseWeightedURLs(t *testing.T, urls ...string) []WeightedURL {
wu, err := ParseWeightedUrls(urls...)
require.NoError(t, err)

13
pkg/cryptutil/certificates.go
View file

@ -219,7 +219,7 @@ func GenerateSelfSignedCertificate(domain string, configure ...func(*x509.Certif
return &cert, nil
}
// ParsePEMCertificate parses PEM encoded certificate block
// ParsePEMCertificate parses a PEM encoded certificate block.
func ParsePEMCertificate(raw []byte) (*x509.Certificate, error) {
data := raw
for {
@ -242,7 +242,16 @@ func ParsePEMCertificate(raw []byte) (*x509.Certificate, error) {
return nil, fmt.Errorf("no certificate block found")
}
// ParsePEMCertificateFromFile decodes PEM certificate from file
// ParsePEMCertificateFromBase64 parses a PEM encoded certificate block from a base64 encoded string.
func ParsePEMCertificateFromBase64(encoded string) (*x509.Certificate, error) {
raw, err := base64.StdEncoding.DecodeString(encoded)
if err != nil {
return nil, err
}
return ParsePEMCertificate(raw)
}
// ParsePEMCertificateFromFile decodes a PEM certificate from a file.
func ParsePEMCertificateFromFile(file string) (*x509.Certificate, error) {
fd, err := os.Open(file)
if err != nil {