260
UF-9000
JAN 2004
Ver. 1.0
DP-180/190
The POP3 client makes note of this timestamp, and then issues the APOP command. The "name''
parameter has identical semantics to the "name" parameter of the USER command. The "digest" parameter
is calculated by applying the MD5 algorithm to a string consisting of the timestamp (including angle-
brackets) followed by a shared secret. This shared secret is a string known only to the POP3 client and
server. Great care should be taken to prevent unauthorized disclosure of the secret, as knowledge of the
secret will allow any entity to successfully masquerade as the named user. The "digest" parameter
itself is a 16-octet value which is sent in hexadecimal format, using lower-case ASCII characters.
When the POP3 server receives the APOP command, it verifies the digest provided. If the digest is correct,
the POP3 server issues a positive response, and the POP3 session enters the TRANSACTION state.
Otherwise, a negative response is issued and the POP3 session remains in the AUTHORIZATION state.
Note that as the length of the shared secret increases, so does the difficulty of deriving it.
Client
Server
+OK maildrop has 1 message (369 octets)
+OK 1
STAT
Establish TCP connection (TCP port No. 110)
+OK POP3 server ready <[email protected]>
APOP USER c4c9334bac560ecc979e58001b3e22fb
Digest parameter, Cha PASSWD
<[email protected]>PASSWD
Produces a 16 octet digest value of
c4c9334bac560ecc979e58001b3e22fb
Challenge Response
<[email protected]>
Possible Responses:
+OK
-ERR permission denied
Continue to follow the POP3 procedure
APOP overview
Содержание DP-180/190
Страница 48: ...48 UF 9000 JAN 2004 Ver 1 0 DP 180 190 20 Remove the LCD Module 127 ...
Страница 72: ...72 UF 9000 JAN 2004 Ver 1 0 DP 180 190 3 3 Preventive Maintenance Points ...
Страница 123: ...123 UF 9000 JAN 2004 Ver 1 0 DP 180 190 Sensor and Switch Location ...
Страница 169: ...169 UF 9000 JAN 2004 Ver 1 0 DP 180 190 6 3 Printer Receive Mechanism 6 3 1 Component Layout and Paper Path ...
Страница 264: ...264 UF 9000 JAN 2004 Ver 1 0 DP 180 190 memo ...
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Страница 267: ...DZSD001829 6 88 Software Operating Instructions Network Firmware Update Tool Service Tool Version 3 ...
Страница 281: ...DZSD000965 10 Panasonic Software Operating Instructions Local Firmware Update Tool Service Tool Version 3 ...
Страница 295: ...memo ...
Страница 296: ...DZZSM00249 ...