89 lines
2.8 KiB
Smalltalk
89 lines
2.8 KiB
Smalltalk
"
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(C) 2010-2012 by Holger Hans Peter Freyther
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All Rights Reserved
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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"
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GSMAuthenticatorBase subclass: GSMIdentityAuthenticator [
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| state timeout |
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<category: 'OsmoMSC-GSM-Auth'>
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<comment: 'I query for the IMSI and IMEI but do this in an insecure
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way and will never switch on the crypto. I will ask for the IMSI and
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IMEI'>
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cancel [
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"Cancel all timers"
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timeout ifNotNil: [timeout cancel. timeout := nil].
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]
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reject: aMsg [
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<category: 'reject'>
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self logError: 'GSMIdentityAuthenticator(srcref:%1) rejecting type %2'
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% {connection srcRef. aMsg class} area: #bsc.
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state := #rejected:.
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onReject value: self.
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]
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start: aMsg [
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"TODO we could take the IMSI from the first message but this
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is mostly for educational purpose."
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(self appropriateInitialMessage: aMsg)
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ifTrue: [self askForIMSI]
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ifFalse: [self reject: aMsg].
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]
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askForIMSI [
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| req |
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timeout := Osmo.TimerScheduler instance
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scheduleInSeconds: 5 block: [self timeOut].
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"I ask for the IMSI."
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req := GSM48IdentityReq new.
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req idType type: GSM48IdentityType typeIMSI.
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state := #askForIMSI:.
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self nextPut: req toMessage.
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]
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askForIMSI: aIdResponse [
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connection
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addInfo: 'IMSI'
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value: aIdResponse mi imsi.
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self logNotice: 'GSMIdentityAuthenticator(srcref:%1) got IMSI(%2).'
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% {connection srcRef. aIdResponse mi imsi} area: #bsc.
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timeout cancel.
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onAccept value: self.
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]
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onData: aMsg [
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[
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self perform: state with: aMsg.
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] on: Error do: [:e |
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e logException: 'GSMIdentityAuthenticator(srcref:%1) failed dispatch.'
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% {connection srcRef} area: #bsc.
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timeout cancel.
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onReject value: self.
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].
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]
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timeOut [
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self logError: 'GSMIdentityAuthenticator(srcref:%1) no reply to %2'
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% {connection srcRef. state} area: #bsc.
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state := #timedout:.
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connection takeLocks: [onReject value: self].
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]
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]
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