74 lines
2.1 KiB
Smalltalk
74 lines
2.1 KiB
Smalltalk
"
|
|
(C) 2011 by Holger Hans Peter Freyther
|
|
All Rights Reserved
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Affero General Public License as
|
|
published by the Free Software Foundation, either version 3 of the
|
|
License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Affero General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Affero General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
"
|
|
|
|
PackageLoader fileInPackage: 'Sockets'.
|
|
|
|
Object subclass: SIPBase64 [
|
|
SIPBase64 class >> encode: aString [
|
|
^ (Base64MimeConverter mimeEncode: aString readStream) contents
|
|
]
|
|
]
|
|
|
|
Object subclass: SIPSecureRandom [
|
|
<comment: 'I try to give some cryptographically secure random numbers'>
|
|
|
|
SIPSecureRandom class >> nextByte [
|
|
<category: 'random'>
|
|
| file |
|
|
file := FileDescriptor open: '/dev/random' mode: 'r'.
|
|
[
|
|
^ file next value.
|
|
] ensure: [
|
|
file close.
|
|
]
|
|
]
|
|
|
|
SIPSecureRandom class >> nextInt [
|
|
<category: 'random'>
|
|
| file |
|
|
file := FileDescriptor open: '/dev/random' mode: 'r'.
|
|
[
|
|
| data |
|
|
data := ByteArray new: 4.
|
|
1 to: data size do: [:each |
|
|
data at: each put: file next value.
|
|
].
|
|
|
|
^ data uintAt: 1
|
|
] ensure: [
|
|
file close.
|
|
]
|
|
]
|
|
]
|
|
|
|
Object subclass: SIPRandomHelper [
|
|
<comment: 'I help with generating numbers'>
|
|
|
|
SIPRandomHelper class >> generateTag [
|
|
<category: 'random'>
|
|
^ SIPBase64 encode: '%1%2' % {
|
|
DateTime now asSeconds. SIPSecureRandom nextInt}
|
|
]
|
|
|
|
SIPRandomHelper class >> generateCallId [
|
|
^ '%1@%2' % {
|
|
SIPBase64 encode: SIPSecureRandom nextInt asString.
|
|
Sockets.SocketAddress localHostName.}
|
|
]
|
|
]
|