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12da5a90e0
New logging interface simplifies and generalizes. 1) Loggers now have only one output. 2) log.Stdout, Stderr, Crash and friends are gone. Logging is now always to standard error by default. 3) log.Panic* replaces log.Crash*. 4) Exiting and panicking are not part of the logger's state; instead the functions Exit* and Panic* simply call Exit or panic after printing. 5) There is now one 'standard logger'. Instead of calling Stderr, use Print etc. There are now triples, by analogy with fmt: Print, Println, Printf What was log.Stderr is now best represented by log.Println, since there are now separate Print and Println functions (and methods). 6) New functions SetOutput, SetFlags, and SetPrefix allow global editing of the standard logger's properties. This is new functionality. For instance, one can call log.SetFlags(log.Lshortfile|log.Ltime|log.Lmicroseconds) to get all logging output to show file name, line number, and time stamp. In short, for most purposes log.Stderr -> log.Println or log.Print log.Stderrf -> log.Printf log.Crash -> log.Panicln or log.Panic log.Crashf -> log.Panicf log.Exit -> log.Exitln or log.Exit log.Exitf -> log.Exitf (no change) This has a slight breakage: since loggers now write only to one output, existing calls to log.New() need to delete the second argument. Also, custom loggers with exit or panic properties will need to be reworked. All package code updated to new interface. The test has been reworked somewhat. The old interface will be removed after the new release. For now, its elements are marked 'deprecated' in their comments. Fixes #1184. R=rsc CC=golang-dev https://golang.org/cl/2419042
76 lines
1.9 KiB
Go
76 lines
1.9 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Generate a self-signed X.509 certificate for a TLS server. Outputs to
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// 'cert.pem' and 'key.pem' and will overwrite existing files.
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package main
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import (
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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"flag"
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"log"
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"os"
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"time"
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)
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var hostName *string = flag.String("host", "127.0.0.1", "Hostname to generate a certificate for")
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func main() {
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flag.Parse()
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urandom, err := os.Open("/dev/urandom", os.O_RDONLY, 0)
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if err != nil {
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log.Exitf("failed to open /dev/urandom: %s", err)
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return
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}
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priv, err := rsa.GenerateKey(urandom, 1024)
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if err != nil {
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log.Exitf("failed to generate private key: %s", err)
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return
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}
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now := time.Seconds()
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template := x509.Certificate{
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SerialNumber: []byte{0},
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Subject: x509.Name{
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CommonName: *hostName,
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Organization: "Acme Co",
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},
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NotBefore: time.SecondsToUTC(now - 300),
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NotAfter: time.SecondsToUTC(now + 60*60*24*365), // valid for 1 year.
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SubjectKeyId: []byte{1, 2, 3, 4},
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KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
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}
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derBytes, err := x509.CreateCertificate(urandom, &template, &template, &priv.PublicKey, priv)
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if err != nil {
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log.Exitf("Failed to create certificate: %s", err)
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return
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}
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certOut, err := os.Open("cert.pem", os.O_WRONLY|os.O_CREAT, 0644)
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if err != nil {
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log.Exitf("failed to open cert.pem for writing: %s", err)
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return
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}
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pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
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certOut.Close()
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log.Print("written cert.pem\n")
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keyOut, err := os.Open("key.pem", os.O_WRONLY|os.O_CREAT, 0600)
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if err != nil {
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log.Print("failed to open key.pem for writing:", err)
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return
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}
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pem.Encode(keyOut, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(priv)})
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keyOut.Close()
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log.Print("written key.pem\n")
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}
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