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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| // Copyright 2022 PingCAP, Inc. | ||
| // | ||
| // 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 cert | ||
|
|
||
| import ( | ||
| "crypto/tls" | ||
| "crypto/x509" | ||
| "sync/atomic" | ||
| "time" | ||
|
|
||
| "github.com/pingcap/TiProxy/lib/config" | ||
| "github.com/pingcap/TiProxy/lib/util/errors" | ||
| "github.com/pingcap/TiProxy/lib/util/security" | ||
| "go.uber.org/zap" | ||
| ) | ||
|
|
||
| // Security configurations don't support dynamically updating now. | ||
| type certInfo struct { | ||
| cfg config.TLSConfig | ||
| tlsConfig atomic.Pointer[tls.Config] | ||
| autoCert bool | ||
| autoCertExp time.Time | ||
| isServer bool | ||
| } | ||
|
|
||
| func (ci *certInfo) buildTLSConfig(lg *zap.Logger) error { | ||
| builder := security.BuildClientTLSConfig | ||
| if ci.isServer { | ||
| builder = security.BuildServerTLSConfig | ||
| } | ||
| tlsConfig, err := builder(lg, ci.cfg) | ||
| if err == nil { | ||
| tlsConfig = ci.customizeTLSConfig(tlsConfig) | ||
| ci.tlsConfig.Store(tlsConfig) | ||
| } | ||
| return err | ||
| } | ||
|
|
||
| func (ci *certInfo) getCertificate() *tls.Certificate { | ||
| tlsConfig := ci.tlsConfig.Load() | ||
| if tlsConfig != nil && len(tlsConfig.Certificates) > 0 { | ||
| return &tlsConfig.Certificates[0] | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (ci *certInfo) getCAs() *x509.CertPool { | ||
| tlsConfig := ci.tlsConfig.Load() | ||
| if tlsConfig != nil { | ||
| if ci.isServer { | ||
| return tlsConfig.ClientCAs | ||
| } | ||
| return tlsConfig.RootCAs | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (ci *certInfo) verifyPeerCertificate(rawCerts [][]byte, _ [][]*x509.Certificate) error { | ||
| if len(rawCerts) == 0 { | ||
| return nil | ||
| } | ||
|
|
||
| certs := make([]*x509.Certificate, len(rawCerts)) | ||
| for i, asn1Data := range rawCerts { | ||
| cert, err := x509.ParseCertificate(asn1Data) | ||
| if err != nil { | ||
| return errors.New("tls: failed to parse certificate from server: " + err.Error()) | ||
| } | ||
| certs[i] = cert | ||
| } | ||
|
|
||
| latestConfig := ci.tlsConfig.Load() | ||
| t := latestConfig.Time | ||
| if t == nil { | ||
| t = time.Now | ||
| } | ||
| opts := x509.VerifyOptions{ | ||
| Roots: ci.getCAs(), | ||
| CurrentTime: t(), | ||
| Intermediates: x509.NewCertPool(), | ||
| } | ||
| if ci.isServer { | ||
| opts.KeyUsages = []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth} | ||
| } else { | ||
| opts.DNSName = latestConfig.ServerName | ||
| } | ||
| for _, cert := range certs[1:] { | ||
| opts.Intermediates.AddCert(cert) | ||
| } | ||
| _, err := certs[0].Verify(opts) | ||
| return err | ||
| } | ||
|
|
||
| // Some methods to rotate server config: | ||
| // - For certs: customize GetCertificate / GetConfigForClient. | ||
| // - For CA: customize ClientAuth + VerifyPeerCertificate / GetConfigForClient | ||
| // Some methods to rotate client config: | ||
| // - For certs: customize GetClientCertificate | ||
| // - For CA: customize InsecureSkipVerify + VerifyPeerCertificate | ||
| func (ci *certInfo) customizeTLSConfig(tlsConfig *tls.Config) *tls.Config { | ||
| if tlsConfig == nil { | ||
| return nil | ||
| } | ||
| tlsConfig = tlsConfig.Clone() | ||
| if ci.isServer { | ||
| tlsConfig.GetCertificate = func(*tls.ClientHelloInfo) (*tls.Certificate, error) { | ||
| return ci.getCertificate(), nil | ||
| } | ||
| if tlsConfig.ClientAuth >= tls.VerifyClientCertIfGiven { | ||
| tlsConfig.ClientAuth = tls.RequireAnyClientCert | ||
| tlsConfig.VerifyPeerCertificate = ci.verifyPeerCertificate | ||
| } | ||
| } else { | ||
| tlsConfig.GetClientCertificate = func(*tls.CertificateRequestInfo) (*tls.Certificate, error) { | ||
| return ci.getCertificate(), nil | ||
| } | ||
| if !tlsConfig.InsecureSkipVerify { | ||
| tlsConfig.InsecureSkipVerify = true | ||
| tlsConfig.VerifyPeerCertificate = ci.verifyPeerCertificate | ||
| } | ||
| } | ||
| return tlsConfig | ||
| } | ||
|
|
||
| func (ci *certInfo) getTLS() *tls.Config { | ||
| return ci.tlsConfig.Load() | ||
| } | ||
|
|
||
| func (ci *certInfo) setAutoCertExp(exp time.Time) { | ||
| ci.autoCertExp = exp | ||
| } | ||
|
|
||
| func (ci *certInfo) needRecreateCert(now time.Time) bool { | ||
| if !ci.autoCert { | ||
| return false | ||
| } | ||
| return now.After(ci.autoCertExp) | ||
| } |
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