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Date   : Wed, 28 Mar 1984 06:51:11-MST
From   : Rick Conn <RCONN@SIMTEL20.ARPA>
Subject: ZCPR3 Intro - Message 10: "Secure Systems"

                    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



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