Mercurial > gemma

annotate pkg/common/random.go @ 2549:9bf6b767a56a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
client: refactored and improved splitscreen for diagrams To make different diagrams possible, the splitscreen view needed to be decoupled from the cross profiles. Also the style has changed to make it more consistent with the rest of the app. The standard box header is now used and there are collapse and expand animations.
author Markus Kottlaender <markus@intevation.de>
date Fri, 08 Mar 2019 08:50:47 +0100
parents 6a021108410b
children 810b28f59b8b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1017
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
1 // This is Free Software under GNU Affero General Public License v >= 3.0
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
2 // without warranty, see README.md and license for details.
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
3 //
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
4 // SPDX-License-Identifier: AGPL-3.0-or-later
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
5 // License-Filename: LICENSES/AGPL-3.0.txt
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
6 //
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
7 // Copyright (C) 2018 by via donau
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
8 // – Österreichische Wasserstraßen-Gesellschaft mbH
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
9 // Software engineering by Intevation GmbH
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
10 //
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
11 // Author(s):
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
a244b18cb916 Added GNU Affero General Public License.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 414
diff changeset
13
408
ac23905e64b1 Improve WFS proxy a lot. It now generates signed re-writings.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 339
diff changeset
14 package common
339
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
15
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
16 import (
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
17 "bytes"
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
18 "crypto/rand"
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
19 "io"
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
20 "log"
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
21 "math/big"
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
22 )
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
23
1345
6a021108410b Finished the doc strings for the common package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1326
diff changeset
24 // GenerateRandomKey generates a cryptographically secure random key
6a021108410b Finished the doc strings for the common package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1326
diff changeset
25 // of a given length.
339
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
26 func GenerateRandomKey(length int) []byte {
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
27 k := make([]byte, length)
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
28 if _, err := io.ReadFull(rand.Reader, k); err != nil {
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
29 return nil
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
30 }
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
31 return k
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
32 }
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
33
1345
6a021108410b Finished the doc strings for the common package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1326
diff changeset
34 // RandomString generates a cryptographically secure password
6a021108410b Finished the doc strings for the common package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1326
diff changeset
35 // of a given length which consists of alpha numeric characters
6a021108410b Finished the doc strings for the common package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1326
diff changeset
36 // and at least one 'special' one.
339
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
37 func RandomString(n int) string {
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
38
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
39 const (
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
40 special = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
41 alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
42 "abcdefghijklmnopqrstuvwxyz" +
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
43 "0123456789" +
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
44 special
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
45 )
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
46
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
47 max := big.NewInt(int64(len(alphabet)))
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
48 out := make([]byte, n)
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
49
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
50 for i := 0; i < 1000; i++ {
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
51 for i := range out {
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
52 v, err := rand.Int(rand.Reader, max)
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
53 if err != nil {
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
54 log.Panicf("error: %v\n", err)
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
55 }
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
56 out[i] = alphabet[v.Int64()]
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
57 }
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
58 // Ensure at least one special char.
1326
515815565bd0 Simplified code a bit.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1017
diff changeset
59 if bytes.ContainsAny(out, special) {
339
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
60 return string(out)
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
61 }
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
62 }
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
63 log.Println("warn: Your random generator may be broken.")
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
64 out[0] = special[0]
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
65 return string(out)
33b59c848771 Factored out some miscellaneous code into own package.
Sascha L. Teichmann <teichmann@intevation.de>
parents:
diff changeset
66 }