/
net.go
77 lines (65 loc) · 1.35 KB
/
net.go
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package main
import (
"net"
"crypto/tls"
"os"
"io/ioutil"
"time"
)
func dialIRC(host string, port int) (*net.TCPConn, os.Error) {
remote, err := net.ResolveIPAddr(host)
if err != nil {
return nil, err
}
return net.DialTCP("tcp4", nil, &net.TCPAddr{ remote.IP, port })
}
func loadRootCA(file string) (*tls.CASet, os.Error) {
pemBytes, err := readFile(file)
if err != nil {
return nil, err
}
caset := tls.NewCASet()
if caset.SetFromPEM(pemBytes) {
return caset, nil
}
return nil, os.NewError("Unable to decode root CA set")
}
func readFile(name string) ([]byte, os.Error) {
contents, err := ioutil.ReadFile(name)
if err != nil {
return nil, err
}
return contents, nil;
}
func newConfig() (*tls.Config, os.Error) {
rootca, err := loadRootCA("ca-certificates.crt")
if err != nil {
return nil, err
}
urandom, err := os.Open("/dev/urandom", os.O_RDONLY, 0)
if err != nil {
return nil, err
}
return &tls.Config{
Rand: urandom,
Time: time.Seconds,
RootCAs: rootca,
}, nil
}
func dialIRCTLS(host string, port int) (c *tls.Conn, err os.Error) {
remote, err := dialIRC(host, port)
if err != nil {
return nil, err
}
config, err := newConfig()
if err != nil {
return nil, err
}
c = tls.Client(remote, config)
err = c.Handshake()
if err == nil {
return c, nil
}
c.Close()
return nil, err
}