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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// This package partially implements the TLS 1.1 protocol, as specified in RFC 4346.
package tls
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"io/ioutil"
"net"
"os"
"strings"
)
func Server(conn net.Conn, config *Config) *Conn {
return &Conn{conn: conn, config: config}
}
func Client(conn net.Conn, config *Config) *Conn {
return &Conn{conn: conn, config: config, isClient: true}
}
type Listener struct {
listener net.Listener
config *Config
}
func (l *Listener) Accept() (c net.Conn, err os.Error) {
c, err = l.listener.Accept()
if err != nil {
return
}
c = Server(c, l.config)
return
}
func (l *Listener) Close() os.Error { return l.listener.Close() }
func (l *Listener) Addr() net.Addr { return l.listener.Addr() }
// NewListener creates a Listener which accepts connections from an inner
// Listener and wraps each connection with Server.
// The configuration config must be non-nil and must have
// at least one certificate.
func NewListener(listener net.Listener, config *Config) (l *Listener) {
l = new(Listener)
l.listener = listener
l.config = config
return
}
func Listen(network, laddr string, config *Config) (net.Listener, os.Error) {
if config == nil || len(config.Certificates) == 0 {
return nil, os.NewError("tls.Listen: no certificates in configuration")
}
l, err := net.Listen(network, laddr)
if err != nil {
return nil, err
}
return NewListener(l, config), nil
}
func Dial(network, laddr, raddr string) (net.Conn, os.Error) {
c, err := net.Dial(network, laddr, raddr)
if err != nil {
return nil, err
}
colonPos := strings.LastIndex(raddr, ":")
if colonPos == -1 {
colonPos = len(raddr)
}
hostname := raddr[:colonPos]
config := defaultConfig()
config.ServerName = hostname
conn := Client(c, config)
err = conn.Handshake()
if err == nil {
return conn, nil
}
c.Close()
return nil, err
}
// LoadX509KeyPair reads and parses a public/private key pair from a pair of
// files. The files must contain PEM encoded data.
func LoadX509KeyPair(certFile string, keyFile string) (cert Certificate, err os.Error) {
certPEMBlock, err := ioutil.ReadFile(certFile)
if err != nil {
return
}
certDERBlock, _ := pem.Decode(certPEMBlock)
if certDERBlock == nil {
err = os.ErrorString("crypto/tls: failed to parse certificate PEM data")
return
}
cert.Certificate = [][]byte{certDERBlock.Bytes}
keyPEMBlock, err := ioutil.ReadFile(keyFile)
if err != nil {
return
}
keyDERBlock, _ := pem.Decode(keyPEMBlock)
if keyDERBlock == nil {
err = os.ErrorString("crypto/tls: failed to parse key PEM data")
return
}
key, err := x509.ParsePKCS1PrivateKey(keyDERBlock.Bytes)
if err != nil {
err = os.ErrorString("crypto/tls: failed to parse key")
return
}
cert.PrivateKey = key
// We don't need to parse the public key for TLS, but we so do anyway
// to check that it looks sane and matches the private key.
x509Cert, err := x509.ParseCertificate(certDERBlock.Bytes)
if err != nil {
return
}
if x509Cert.PublicKeyAlgorithm != x509.RSA || x509Cert.PublicKey.(*rsa.PublicKey).N.Cmp(key.PublicKey.N) != 0 {
err = os.ErrorString("crypto/tls: private key does not match public key")
return
}
return
}
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