RCONN@SIMTEL20.ARPA (03/28/84)
From: Rick Conn <RCONN@SIMTEL20.ARPA>
ZCPR3 - "Secure" Systems
Finally, with password protecton and named
directories (DIR form) built into ZCPR3, ZCPR3
offers a much more secure environment than CP/M.
In particular, if the DU form is disabled, the only
directories a user can access are those he can
name, and some of those may have password
protections on them.
Here is a complete session from cold boot on:
AMPRO 51K TPA CP/M 2.2 with ZCPR 3.0
BIOS Version 1.2 on March 24, 1984
ZCPR3 LDR, Version 1.0
Loading SYS.ENV
Loading SYS.NDR
Loading SYS.FCP
Loading SYS.RCP
ERROR4, Version 1.0
Error Handler Installed
WELCOME TO ZCPR III
BASE>dir
AMPZ358R.COM 10 | SYS3R .RCP 2
A0:BASE -- 2 Files Using 12K ( 266K Left)
BASE>pwd
PWD, Version 1.0
DU : DIR Name DU : DIR Name DU : DIR Name DU : DIR Name
---- -------- ---- -------- ---- -------- ---- --------
A 0: BASE A 1: PRIVATE1 A 2: PRIVATE2 A 15: ROOT
B 0: DEMO1 B 1: DEMO2 B 2: DEMO3 B 3: DEMO4
B 4: DEMO5 B 5: INTRO B 6: MAIL
BASE>dir root:
PW? unknown
AMPZ358R.COM 10 | SYS3R .RCP 2
A0:BASE -- 2 Files Using 12K ( 266K Left)
BASE>dir root:
PW? rpass
DIR .COM 2 | ERROR4 .COM 2 | GOTO .COM 2 | LDR .COM 4
MENU .COM 4 | MKDIR .COM 6 | PWD .COM 2 | SETFILE .COM 2
SH .COM 4 | SHDEFINE.COM 4 | SHFILE .COM 2 | SHOW .COM 4
SHVAR .COM 4 | SPECIAL .NDR 2 | STARTUP .COM 2 | SYS .ENV 2
SYS .FCP 2 | SYS .NDR 2 | SYS .RCP 2 | TCCHECK .COM 2
TCMAKE .COM 6 | TCSELECT.COM 4 | WHEEL .COM 2 | Z3TCAP .TCP 8
ZEX .COM 6
A15:ROOT -- 25 Files Using 82K ( 266K Left)
BASE>xxx
File XXX.COM Not Found
Note that the DU form is simply ignored. No
change to files or directory location is made.
BASE>1:
BASE>a:
BASE>b:
BASE>dir 1:
AMPZ358R.COM 10 | SYS3R .RCP 2
A0:BASE -- 2 Files Using 12K ( 266K Left)
BASE>dir demo1:
AMPZ3-58.COM 10 | AMPZ3-60.COM 10 | AMPZ3-61.COM 10 | AMPZ358R.COM 10
BDOS58 .COM 4 | BDOS60 .COM 4 | BDOS61 .COM 4 | CPM58 .COM 10
CPM60 .COM 10 | CPM61 .COM 10 | SYS3R .RCP 2
B0:DEMO1 -- 11 Files Using 84K ( 284K Left)
BASE>demo1:
DEMO1>root:
PW? rpass
ROOT>wheel /s
WHEEL, Version 3.0
Wheel Password? Wheel Byte is ON
ROOT>NOTE We now have one directory structure:
ROOT>pwd
PWD, Version 1.0
DU : DIR Name DU : DIR Name DU : DIR Name DU : DIR Name
---- -------- ---- -------- ---- -------- ---- --------
A 0: BASE A 1: PRIVATE1 A 2: PRIVATE2 A 15: ROOT
B 0: DEMO1 B 1: DEMO2 B 2: DEMO3 B 3: DEMO4
B 4: DEMO5 B 5: INTRO B 6: MAIL
With the ability to have several named
directory files, we can have several sets of
directories, including some directories which are
both hidden and totally inaccessable to the user
unless he has the ability to load the proper named
directory (NDR) file.
ROOT>NOTE Now that I am a WHEEL and in ROOT, I can define another
ROOT>NOTE directory structure which is special:
ROOT>ldr special.ndr
ZCPR3 LDR, Version 1.0
Loading SPECIAL.NDR
ROOT>pwd
PWD, Version 1.0
DU : DIR Name DU : DIR Name DU : DIR Name DU : DIR Name
---- -------- ---- -------- ---- -------- ---- --------
A 0: BASE A 1: PRIVATE1 A 2: PRIVATE2 A 14: SYSROOT
A 15: ROOT
B 0: DEMO1 B 1: DEMO2 B 2: DEMO3 B 3: DEMO4
B 4: DEMO5 B 5: INTRO B 6: MAIL
ROOT>NOTE Note that there is a 2nd root, called SYSROOT, which
ROOT>NOTE was not known (OR ACCESSIBLE) under the old system
ROOT>NOTE (SYS.NDR)
ROOT>
ROOT>NOTE Also, as a wheel, I can obtain passwords:
ROOT>pwd pass
PWD, Version 1.0
DU : DIR Name - Password DU : DIR Name - Password
---- -------- -------- ---- -------- --------
A 0: BASE - A 1: PRIVATE1 - MYPASS1
A 2: PRIVATE2 - PASS A 14: SYSROOT - SPASS
A 15: ROOT - RPASS
B 0: DEMO1 - B 1: DEMO2 -
B 2: DEMO3 - B 3: DEMO4 -
B 4: DEMO5 - B 5: INTRO -
B 6: MAIL - MPASS
ROOT>private1:
PW? mypass1
PRIVATE1>wheel /r
WHEEL, Version 3.0
Wheel Password? Wheel Byte is OFF
PRIVATE1>pwd pass
PWD, Version 1.0
Password Request Denied - Not Wheel
DU : DIR Name DU : DIR Name DU : DIR Name DU : DIR Name
---- -------- ---- -------- ---- -------- ---- --------
A 0: BASE A 1: PRIVATE1 A 2: PRIVATE2 A 14: SYSROOT
A 15: ROOT
B 0: DEMO1 B 1: DEMO2 B 2: DEMO3 B 3: DEMO4
B 4: DEMO5 B 5: INTRO B 6: MAIL
PRIVATE1>ldr root:sys.ndr
PW? rpass
ZCPR3 LDR, Version 1.0
Loading SYS.NDR
PRIVATE1>ldr root:special.ndr
PW? rpass
ZCPR3 LDR, Version 1.0
Loading SPECIAL.NDR
PRIVATE1>sysroot:
PW? spass
SYSROOT>root:
PW? rpass
ROOT>ldr sys.ndr
ZCPR3 LDR, Version 1.0
Loading SYS.NDR
ROOT>sysroot:
ROOT>NOTE SYSROOT is not even defined now
-------