TELETRUST MailTrusT Spezifikation - Secorvo Security Consulting ...

Inhaltsverzeichnis
1 Überblick ........................................................................................................................... 1
2 Einleitung .......................................................................................................................... 2
2.1 Ziel der MailTrusT-Spezifikation....................................................................................... 2
2.2 Schnittstellen der MailTrusT-Spezifikation ....................................................................... 2
2.3 Konformität mit der MailTrusT-Spezifikation .................................................................... 3
3 Spezifikation der Dokumentenaustauschformate .......................................................... 4
3.1 Überblick.......................................................................................................................... 4
3.2 Spezifikation .................................................................................................................... 5
3.2.1 Nachrichtenklassen....................................................................................................... 5
3.2.1.1 PEM-Nachrichten....................................................................................................... 5
3.2.1.2 MTT-Nachrichten ....................................................................................................... 5
3.2.2 Nachrichtentypen..........................................................................................................6
3.2.2.1 Proc-Type: 4,MIC-ONLY............................................................................................ 6
3.2.2.2 Proc-Type: 4,MIC-CLEAR.......................................................................................... 7
3.2.2.3 Proc-Type: 4,ENCRYPTED ....................................................................................... 7
3.2.2.4 Proc-Type: MTT-1,MIC-BIN ....................................................................................... 7
3.2.2.5 Proc-Type: MTT-1,ENCRYPTED-BIN........................................................................ 8
3.2.2.6 Proc-Type: MTT-1,MIC-RAW..................................................................................... 8
3.2.2.7 Proc-Type: MTT-1,ENCRYPTED-RAW ..................................................................... 9
3.2.3 Transformation von Nachrichten ................................................................................. 10
3.2.3.1 Kanonisieren............................................................................................................11
3.2.3.2 Signieren.................................................................................................................. 14
3.2.3.3 Verschlüsseln .......................................................................................................... 14
3.2.3.4 Kodieren .................................................................................................................. 15
3.2.3.5 Zusammensetzen .................................................................................................... 17
3.2.4 Kopf-Informationen ..................................................................................................... 19
3.2.4.1 Proc-Type ................................................................................................................ 20
3.2.4.2 Content-Domain....................................................................................................... 21
3.2.4.3 DEK-Info .................................................................................................................. 23
3.2.4.4 Originator-ID-Asymmetric ........................................................................................ 23
3.2.4.5 Originator-ID-Symmetric .......................................................................................... 23
3.2.4.6 Originator-Certificate................................................................................................ 24
3.2.4.7 MIC-Info................................................................................................................... 24
3.2.4.8 Issuer-Certificate......................................................................................................25
3.2.4.9 Recipient-ID-Asymmetric ......................................................................................... 25
3.2.4.10 Recipient-ID-Symmetric ......................................................................................... 26
MailTrusT-Spezifikation Seite iii von v
Mttspc11.doc Stand: 15. Dezember 1997