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Code Issues Releases Wiki Activity

verify peer cert function for better man in the middle prevention

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This commit is contained in:
Shelikhoo 2021-04-15 18:16:19 +01:00
parent 327cbdc5cd
commit 59472de6a9
No known key found for this signature in database
GPG Key ID: C4D5E79D22B25316
3 changed files with 53 additions and 3 deletions
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26
transport/internet/tls/config.go
View File

@ -3,8 +3,11 @@
package tls
import (
"crypto/hmac"
"crypto/sha256"
"crypto/tls"
"crypto/x509"
"encoding/hex"
"strings"
"sync"
"time"
@ -170,6 +173,28 @@ func (c *Config) parseServerName() string {
return c.ServerName
}
func (c *Config) verifyPeerCert(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
if c.PinnedPeerCertificateChainSha256 != nil {
var hashValue []byte
for _, certValue := range rawCerts {
out := sha256.Sum256(certValue)
if hashValue == nil {
hashValue = out[:]
} else {
newHashValue := sha256.Sum256(append(hashValue, out[:]...))
hashValue = newHashValue[:]
}
}
for _, v := range c.PinnedPeerCertificateChainSha256 {
if hmac.Equal(hashValue, v) {
return nil
}
}
return newError("peer cert is unrecognized: ", hex.EncodeToString(hashValue))
}
return nil
}
// GetTLSConfig converts this Config into tls.Config.
func (c *Config) GetTLSConfig(opts ...Option) *tls.Config {
root, err := c.getCertPool()
@ -193,6 +218,7 @@ func (c *Config) GetTLSConfig(opts ...Option) *tls.Config {
InsecureSkipVerify: c.AllowInsecure,
NextProtos: c.NextProtocol,
SessionTicketsDisabled: !c.EnableSessionResumption,
VerifyPeerCertificate: c.verifyPeerCert,
}
for _, opt := range opts {

23
transport/internet/tls/config.pb.go
View File

@ -152,6 +152,11 @@ type Config struct {
// If true, root certificates on the system will not be loaded for
// verification.
DisableSystemRoot bool `protobuf:"varint,6,opt,name=disable_system_root,json=disableSystemRoot,proto3" json:"disable_system_root,omitempty"`
// @Document A pinned certificate chain sha256 hash.
//@Document If the server's hash does not match this value, the connection will be aborted.
//@Document This value replace allow_insecure.
//@Critical
PinnedPeerCertificateChainSha256 [][]byte `protobuf:"bytes,7,rep,name=pinned_peer_certificate_chain_sha256,json=pinnedPeerCertificateChainSha256,proto3" json:"pinned_peer_certificate_chain_sha256,omitempty"`
}
func (x *Config) Reset() {
@ -228,6 +233,13 @@ func (x *Config) GetDisableSystemRoot() bool {
return false
}
func (x *Config) GetPinnedPeerCertificateChainSha256() [][]byte {
if x != nil {
return x.PinnedPeerCertificateChainSha256
}
return nil
}
var File_transport_internet_tls_config_proto protoreflect.FileDescriptor
var file_transport_internet_tls_config_proto_rawDesc = []byte{
@ -248,8 +260,8 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
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@ -268,7 +280,12 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
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7
transport/internet/tls/config.proto
View File

@ -41,4 +41,11 @@ message Config {
// If true, root certificates on the system will not be loaded for
// verification.
bool disable_system_root = 6;
/* @Document A pinned certificate chain sha256 hash.
@Document If the server's hash does not match this value, the connection will be aborted.
@Document This value replace allow_insecure.
@Critical
*/
repeated bytes pinned_peer_certificate_chain_sha256 = 7;
}