ginuerzh
462 lines
16 KiB
Go
462 lines
16 KiB
Go
package tls
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import (
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"crypto"
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"crypto/rand"
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"crypto/tls"
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"crypto/x509"
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"crypto/x509/pkix"
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"errors"
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"fmt"
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"math/big"
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"net"
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"os"
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"strconv"
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"strings"
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"time"
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"github.com/go-gost/core/logger"
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"github.com/go-gost/x/config"
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"github.com/patrickmn/go-cache"
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)
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const (
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VersionTLS10 = "VersionTLS10"
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VersionTLS11 = "VersionTLS11"
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VersionTLS12 = "VersionTLS12"
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VersionTLS13 = "VersionTLS13"
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)
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// Cipher suites from https://pkg.go.dev/crypto/tls#pkg-constants
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const (
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// TLS 1.0 - 1.2 cipher suites.
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TLS_RSA_WITH_RC4_128_SHA = "TLS_RSA_WITH_RC4_128_SHA"
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TLS_RSA_WITH_3DES_EDE_CBC_SHA = "TLS_RSA_WITH_3DES_EDE_CBC_SHA"
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TLS_RSA_WITH_AES_128_CBC_SHA = "TLS_RSA_WITH_AES_128_CBC_SHA"
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TLS_RSA_WITH_AES_256_CBC_SHA = "TLS_RSA_WITH_AES_256_CBC_SHA"
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TLS_RSA_WITH_AES_128_CBC_SHA256 = "TLS_RSA_WITH_AES_128_CBC_SHA256"
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TLS_RSA_WITH_AES_128_GCM_SHA256 = "TLS_RSA_WITH_AES_128_GCM_SHA256"
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TLS_RSA_WITH_AES_256_GCM_SHA384 = "TLS_RSA_WITH_AES_256_GCM_SHA384"
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TLS_ECDHE_ECDSA_WITH_RC4_128_SHA = "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA"
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TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA = "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA"
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TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA = "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA"
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TLS_ECDHE_RSA_WITH_RC4_128_SHA = "TLS_ECDHE_RSA_WITH_RC4_128_SHA"
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TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA = "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA"
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TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA = "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA"
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TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA = "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA"
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TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 = "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256"
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TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 = "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"
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TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 = "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256"
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TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 = "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256"
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TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 = "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384"
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TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 = "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384"
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TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256"
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TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 = "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256"
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// TLS 1.3 cipher suites.
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TLS_AES_128_GCM_SHA256 = "TLS_AES_128_GCM_SHA256"
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TLS_AES_256_GCM_SHA384 = "TLS_AES_256_GCM_SHA384"
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TLS_CHACHA20_POLY1305_SHA256 = "TLS_CHACHA20_POLY1305_SHA256"
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// TLS_FALLBACK_SCSV isn't a standard cipher suite but an indicator
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// that the client is doing version fallback. See RFC 7507.
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TLS_FALLBACK_SCSV = "TLS_FALLBACK_SCSV"
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)
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var (
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cipherSuites = map[uint16]string{
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tls.TLS_RSA_WITH_RC4_128_SHA: TLS_RSA_WITH_RC4_128_SHA,
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tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA: TLS_RSA_WITH_3DES_EDE_CBC_SHA,
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tls.TLS_RSA_WITH_AES_128_CBC_SHA: TLS_RSA_WITH_AES_128_CBC_SHA,
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tls.TLS_RSA_WITH_AES_256_CBC_SHA: TLS_RSA_WITH_AES_256_CBC_SHA,
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tls.TLS_RSA_WITH_AES_128_CBC_SHA256: TLS_RSA_WITH_AES_128_CBC_SHA256,
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tls.TLS_RSA_WITH_AES_128_GCM_SHA256: TLS_RSA_WITH_AES_128_GCM_SHA256,
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tls.TLS_RSA_WITH_AES_256_GCM_SHA384: TLS_RSA_WITH_AES_256_GCM_SHA384,
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tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA: TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
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tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
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tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
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tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA: TLS_ECDHE_RSA_WITH_RC4_128_SHA,
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tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA: TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
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tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
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tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
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tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
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tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
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tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
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tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256: TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
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tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
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tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
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tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256: TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
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tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256: TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
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tls.TLS_AES_128_GCM_SHA256: TLS_AES_128_GCM_SHA256,
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tls.TLS_AES_256_GCM_SHA384: TLS_AES_256_GCM_SHA384,
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tls.TLS_CHACHA20_POLY1305_SHA256: TLS_CHACHA20_POLY1305_SHA256,
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}
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versions = map[uint16]string{
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tls.VersionSSL30: "sslv3",
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tls.VersionTLS10: "tls1.0",
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tls.VersionTLS11: "tls1.1",
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tls.VersionTLS12: "tls1.2",
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tls.VersionTLS13: "tls1.3",
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}
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)
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type CipherSuite uint16
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func (cs CipherSuite) String() string {
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if v, ok := cipherSuites[uint16(cs)]; ok {
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return v
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}
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return strconv.Itoa(int(cs))
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}
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type Version uint16
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func (ver Version) String() string {
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if v, ok := versions[uint16(ver)]; ok {
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return v
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}
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return strconv.Itoa(int(ver))
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}
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// LoadDefaultConfig loads the certificate from cert & key files and optional CA file.
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func LoadDefaultConfig(certFile, keyFile, caFile string) (*tls.Config, error) {
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cert, err := tls.LoadX509KeyPair(certFile, keyFile)
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if err != nil {
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return nil, err
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}
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cfg := &tls.Config{Certificates: []tls.Certificate{cert}}
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pool, err := loadCA(caFile)
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if err != nil {
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logger.Default().Debugf("load default CA(%s): %v", caFile, err)
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}
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if pool != nil {
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cfg.ClientCAs = pool
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cfg.ClientAuth = tls.RequireAndVerifyClientCert
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}
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return cfg, nil
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}
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// LoadServerConfig loads the certificate from cert & key files and client CA file.
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func LoadServerConfig(config *config.TLSConfig) (*tls.Config, error) {
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if config.CertFile == "" && config.KeyFile == "" {
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return nil, nil
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}
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cert, err := tls.LoadX509KeyPair(config.CertFile, config.KeyFile)
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if err != nil {
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return nil, err
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}
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cfg := &tls.Config{Certificates: []tls.Certificate{cert}}
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pool, err := loadCA(config.CAFile)
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if err != nil {
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return nil, err
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}
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if pool != nil {
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cfg.ClientCAs = pool
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cfg.ClientAuth = tls.RequireAndVerifyClientCert
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}
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SetTLSOptions(cfg, config.Options)
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return cfg, nil
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}
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// LoadClientConfig loads the certificate from cert & key files and CA file.
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func LoadClientConfig(config *config.TLSConfig) (*tls.Config, error) {
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var cfg *tls.Config
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if config.CertFile == "" && config.KeyFile == "" {
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cfg = &tls.Config{}
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} else {
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cert, err := tls.LoadX509KeyPair(config.CertFile, config.KeyFile)
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if err != nil {
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return nil, err
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}
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cfg = &tls.Config{
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Certificates: []tls.Certificate{cert},
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}
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}
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rootCAs, err := loadCA(config.CAFile)
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if err != nil {
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return nil, err
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}
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cfg.RootCAs = rootCAs
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cfg.ServerName = config.ServerName
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cfg.InsecureSkipVerify = !config.Secure
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if config.Options != nil {
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SetTLSOptions(cfg, config.Options)
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}
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// If the root ca is given, but skip verify, we verify the certificate manually.
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if cfg.RootCAs != nil && !config.Secure {
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cfg.VerifyConnection = func(state tls.ConnectionState) error {
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opts := x509.VerifyOptions{
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Roots: cfg.RootCAs,
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CurrentTime: time.Now(),
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DNSName: "",
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Intermediates: x509.NewCertPool(),
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}
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certs := state.PeerCertificates
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for i, cert := range certs {
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if i == 0 {
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continue
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}
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opts.Intermediates.AddCert(cert)
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}
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_, err := certs[0].Verify(opts)
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return err
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}
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}
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return cfg, nil
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}
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func SetTLSOptions(cfg *tls.Config, opts *config.TLSOptions) {
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if cfg == nil || opts == nil {
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return
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}
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switch strings.ToLower(opts.MinVersion) {
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case strings.ToLower(VersionTLS10):
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cfg.MinVersion = tls.VersionTLS10
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case strings.ToLower(VersionTLS11):
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cfg.MinVersion = tls.VersionTLS11
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case strings.ToLower(VersionTLS12):
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cfg.MinVersion = tls.VersionTLS12
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case strings.ToLower(VersionTLS13):
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cfg.MinVersion = tls.VersionTLS13
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}
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switch strings.ToLower(opts.MaxVersion) {
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case strings.ToLower(VersionTLS10):
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cfg.MaxVersion = tls.VersionTLS10
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case strings.ToLower(VersionTLS11):
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cfg.MaxVersion = tls.VersionTLS11
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case strings.ToLower(VersionTLS12):
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cfg.MaxVersion = tls.VersionTLS12
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case strings.ToLower(VersionTLS13):
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cfg.MaxVersion = tls.VersionTLS13
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}
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for _, v := range opts.CipherSuites {
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switch strings.ToUpper(v) {
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case TLS_RSA_WITH_RC4_128_SHA:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_RSA_WITH_RC4_128_SHA)
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case TLS_RSA_WITH_3DES_EDE_CBC_SHA:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA)
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case TLS_RSA_WITH_AES_128_CBC_SHA:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_RSA_WITH_AES_128_CBC_SHA)
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case TLS_RSA_WITH_AES_256_CBC_SHA:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_RSA_WITH_AES_256_CBC_SHA)
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case TLS_RSA_WITH_AES_128_CBC_SHA256:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_RSA_WITH_AES_128_CBC_SHA256)
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case TLS_RSA_WITH_AES_128_GCM_SHA256:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_RSA_WITH_AES_128_GCM_SHA256)
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case TLS_RSA_WITH_AES_256_GCM_SHA384:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_RSA_WITH_AES_256_GCM_SHA384)
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case TLS_ECDHE_ECDSA_WITH_RC4_128_SHA:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA)
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case TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA)
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case TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA)
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case TLS_ECDHE_RSA_WITH_RC4_128_SHA:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA)
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case TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA)
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case TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA)
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case TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA)
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case TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256)
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case TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256)
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case TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256)
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case TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
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case TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384)
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case TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
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case TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256)
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case TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256:
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cfg.CipherSuites = append(cfg.CipherSuites, tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256)
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}
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}
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cfg.NextProtos = opts.ALPN
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}
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func loadCA(caFile string) (cp *x509.CertPool, err error) {
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if caFile == "" {
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return
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}
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cp = x509.NewCertPool()
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data, err := os.ReadFile(caFile)
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if err != nil {
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return nil, err
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}
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if !cp.AppendCertsFromPEM(data) {
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return nil, fmt.Errorf("loadCA %s: AppendCertsFromPEM failed", caFile)
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}
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return
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}
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// Wrap a net.Conn into a client tls connection, performing any
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// additional verification as needed.
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//
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// As of go 1.3, crypto/tls only supports either doing no certificate
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// verification, or doing full verification including of the peer's
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// DNS name. For consul, we want to validate that the certificate is
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// signed by a known CA, but because consul doesn't use DNS names for
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// node names, we don't verify the certificate DNS names. Since go 1.3
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// no longer supports this mode of operation, we have to do it
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// manually.
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//
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// This code is taken from consul:
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// https://github.com/hashicorp/consul/blob/master/tlsutil/config.go
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func WrapTLSClient(conn net.Conn, tlsConfig *tls.Config, timeout time.Duration) (net.Conn, error) {
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var err error
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var tlsConn *tls.Conn
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if timeout > 0 {
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conn.SetDeadline(time.Now().Add(timeout))
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defer conn.SetDeadline(time.Time{})
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}
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tlsConn = tls.Client(conn, tlsConfig)
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// Otherwise perform handshake, but don't verify the domain
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//
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// The following is lightly-modified from the doFullHandshake
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// method in https://golang.org/src/crypto/tls/handshake_client.go
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if err = tlsConn.Handshake(); err != nil {
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tlsConn.Close()
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return nil, err
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}
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// We can do this in `tls.Config.VerifyConnection`, which effective for
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// other TLS protocols such as WebSocket. See `route.go:parseChainNode`
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/*
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// If crypto/tls is doing verification, there's no need to do our own.
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if tlsConfig.InsecureSkipVerify == false {
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return tlsConn, nil
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}
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// Similarly if we use host's CA, we can do full handshake
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if tlsConfig.RootCAs == nil {
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return tlsConn, nil
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}
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opts := x509.VerifyOptions{
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Roots: tlsConfig.RootCAs,
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CurrentTime: time.Now(),
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DNSName: "",
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Intermediates: x509.NewCertPool(),
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}
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certs := tlsConn.ConnectionState().PeerCertificates
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for i, cert := range certs {
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if i == 0 {
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continue
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}
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opts.Intermediates.AddCert(cert)
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}
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_, err = certs[0].Verify(opts)
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if err != nil {
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tlsConn.Close()
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return nil, err
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}
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*/
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return tlsConn, err
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}
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var (
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ErrCertNotFound = errors.New("certificate not found")
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)
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type CertPool interface {
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Get(serverName string) (*x509.Certificate, error)
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Put(serverName string, cert *x509.Certificate)
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}
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type memoryCertPool struct {
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|
cache *cache.Cache
|
|
}
|
|
|
|
func NewMemoryCertPool() CertPool {
|
|
return &memoryCertPool{
|
|
cache: cache.New(24*7*time.Hour, 1*time.Hour),
|
|
}
|
|
}
|
|
|
|
func (p *memoryCertPool) Get(serverName string) (*x509.Certificate, error) {
|
|
v, ok := p.cache.Get(serverName)
|
|
if !ok {
|
|
return nil, ErrCertNotFound
|
|
}
|
|
return v.(*x509.Certificate), nil
|
|
}
|
|
|
|
func (p *memoryCertPool) Put(serverName string, cert *x509.Certificate) {
|
|
p.cache.Set(serverName, cert, cache.DefaultExpiration)
|
|
}
|
|
|
|
func GenerateCertificate(serverName string, validity time.Duration, caCert *x509.Certificate, caKey crypto.PrivateKey) (*x509.Certificate, error) {
|
|
if host, _, _ := net.SplitHostPort(serverName); host != "" {
|
|
serverName = host
|
|
}
|
|
|
|
tmpl := &x509.Certificate{
|
|
SerialNumber: big.NewInt(time.Now().UnixNano() / 100000),
|
|
Subject: pkix.Name{
|
|
Organization: []string{"GOST"},
|
|
},
|
|
NotBefore: time.Now().Add(-validity),
|
|
NotAfter: time.Now().Add(validity),
|
|
SignatureAlgorithm: x509.SHA256WithRSA,
|
|
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth, x509.ExtKeyUsageClientAuth},
|
|
}
|
|
|
|
if ip := net.ParseIP(serverName); ip != nil {
|
|
tmpl.IPAddresses = []net.IP{ip}
|
|
} else {
|
|
tmpl.Subject.CommonName = serverName
|
|
tmpl.DNSNames = []string{serverName}
|
|
}
|
|
|
|
pk, ok := caKey.(privateKey)
|
|
if !ok {
|
|
return nil, errors.New("invalid private key type")
|
|
}
|
|
|
|
raw, err := x509.CreateCertificate(rand.Reader, tmpl, caCert, pk.Public(), caKey)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return x509.ParseCertificate(raw)
|
|
}
|
|
|
|
// https://pkg.go.dev/crypto#PrivateKey
|
|
type privateKey interface {
|
|
Public() crypto.PublicKey
|
|
Equal(x crypto.PrivateKey) bool
|
|
}
|