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- Pretty Good Privacy version 2.6
- Installation Guide by Perry Metzger
- Edited for 2.5 by Colin Plumb and others
- Edited (trivially) for 2.6 by Jeff Schiller
-
-
- How to Install PGP
- ==================
-
- The first question is, what platform are you on?
-
- The base PGP 2.6 distribution runs on several varieties of Unix, MS-DOS
- and VAX VMS. Ports can be expected shortly to the Atari, Amiga, and
- possibly other systems. Naturally, installation instructions differ
- depending on your hardware. Separate instructions are provided here for
- MSDOS and Unix.
-
- No matter what the machine you are on, though, do this...
-
- STEP 1:
- READ THE DOCUMENTATION. At least read Volume I of the PGP User's
- Guide. Cryptography software is easy to misuse, and if you don't use
- it properly much of the security you could gain by using it will be
- lost! You might also be unfamiliar with the concepts behind public key
- cryptography; the manual explains these ideas. Even if you are already
- familiar with public key cryptography, it is important that you
- understand the various security issues associated with using PGP. PGP
- may be an unpickable lock, but you have to install it in the door
- properly or it won't provide security.
-
- See the section below for your system's particular installation
- instructions.
-
- If you do not have any of these systems, you will either have to port
- the sources to your machine or find someone who has already done so.
-
- ######################################################################
- For MSDOS:
-
- PGP is distributed in a compressed archive format, which keeps all
- the relevant files grouped together, and also saves disk space and
- transmission time.
-
- The current version, 2.6, is archived with the ZIP utility, and the
- PGP executable binary release system is in a file named PGP26.ZIP.
- This contains the executable program, the user documentation, the
- RSAREF license, and a few keys and signatures. There is also a
- second file available containing the C and assembly source code,
- called PGP26SRC.ZIP. If you are a programmer, this may be of interest
- to you. This should be available from the same source from which you
- got PGP26.ZIP. If not, and you want it, see the Licensing and
- Distribution section of the PGP User's Guide.
-
- You will need PKUNZIP version 1.1 or later to uncompress and split
- the PGP26.ZIP archive file into individual files. PKUNZIP is
- shareware and is widely available on MSDOS machines.
-
- Create a directory for the PGP files. For this description, let's
- use the directory C:\PGP as an example, but you should substitute
- your own disk and directory name if you use something different.
- Type these commands to make the new directory:
-
- c:
- md \pgp
- cd \pgp
-
- Uncompress the distribution file PGP26.ZIP to the directory. For
- this example, we will assume the file is on floppy drive A - if not,
- substitute your own file location.
-
- pkunzip -d a:pgp26
-
- If you omit the -d flag, all the files in the doc subdirectory will
- be deposited in the pgp directory. This merely causes clutter.
-
- This will create the file PGP26I.ZIP and PGP26I.ASC. Unzip PGP26I.ZIP
- with the command:
-
- pkunzip -d pgp26i
-
- Keep the PGP26I.ZIP file around. Once you have PGP working you can use
- PGP26I.ASC to verify the digital signature on PGP26I.ZIP. It should come
- from Jeffrey I. Schiller (whose key is included in keys.asc).
-
- Setting the Environment
- -----------------------
-
- Next, you can set an MSDOS "environment variable" to let PGP know
- where to find its special files, in case you use it from other than
- the default PGP directory. Use your favorite text editor to add the
- following lines to your AUTOEXEC.BAT file (usually on your C: drive):
-
- SET PGPPATH=C:\PGP
- SET PATH=C:\PGP;%PATH%
-
- Substitute your own directory name if different from "C:\PGP".
-
- The CONFIG.TXT file contains various preferences. You can change
- the language PGP operates in, and the character set it uses. The
- IBM PC's default character set, "Code Page 850" will be used if the
- line "charset = cp850" appears in the config.txt file. You probably
- want to add that line.
-
- Another environmental variable you should set in MSDOS is "TZ", which
- tells MSDOS what time zone you are in, which helps PGP create GMT
- timestamps for its keys and signatures. If you properly define TZ in
- AUTOEXEC.BAT, then MSDOS gives you good GMT timestamps, and will
- handle daylight savings time adjustments for you. Here are some
- sample lines to insert into AUTOEXEC.BAT, depending on your time
- zone:
-
- For Los Angeles: SET TZ=PST8PDT
- For Denver: SET TZ=MST7MDT
- For Arizona: SET TZ=MST7
- (Arizona never uses daylight savings time)
- For Chicago: SET TZ=CST6CDT
- For New York: SET TZ=EST5EDT
- For London: SET TZ=GMT0BST
- For Amsterdam: SET TZ=MET-1DST
- For Moscow: SET TZ=MSK-3MSD
- For Aukland: SET TZ=NZT-13
-
- Now reboot your system to run AUTOEXEC.BAT, which will set up
- PGPPATH and TZ for you.
-
-
-
- Generating Your First Key
- -------------------------
-
- One of the first things you will want to do to really use PGP (other
- than to test itself) is to generate your own key. This is described in
- more detail in the "RSA Key Generation" section of the PGP User's
- Guide. Remember that your key becomes something like your written
- signature or your bank card code number or even a house key - keep it
- secret and keep it secure! Use a long, unguessable pass phrase and
- remember it. Right after you generate a key, put it on your key rings
- and copy your secret keyring (SECRING.PGP) to a blank floppy and write
- protect the floppy.
-
- If you are a first-time user of PGP, it is a good idea to generate
- a short test key, with a short passphrase, to play around with PGP
- for a little bit and see how it works, or even more than one so
- you can pretend to be sending messages between two different people.
- Since you won't be guarding any secrets, this can be short and have
- a simple pass phrase. But when you generate your permanent key,
- that you intend to give to others so they can send secure messages
- to you, be much more careful.
-
- After you generate your own key pair, you can add a few more public
- keys to your key ring. A collection of sample public keys is
- provided with the release in the file KEYS.ASC. To add them to your
- public key ring, see the PGP User's Guide, in the section on adding
- keys to your key ring.
-
-
- ######################################################################
- For UNIX:
-
- You likely will have to compile PGP for your system; to do this, first
- make sure the unpacked files are in the correct unix textfile format
- (the files in pgp23src.zip are in MSDOS CRLF format, so for Unix you
- must unpack with "unzip -a"; the tar file pgp23.tar.Z uses normal Unix
- line feed conventions). Then copy the file "makefile.unx" in the
- distribution to "Makefile".
-
- Then, you will need the March 16, 1994 release of the RSAREF 2.0
- package. It is included with the PGP 2.5 distribution from MIT. It
- should be unpacked in a directory named "rsaref2" that is a sibling of
- the directory that PGP is unpacked in. (If you use a different
- location, you will have to modify the Makefile and rsaglue2.c.)
-
- Make a directory rsaref2/unix, copy the makefile over from
- rsaref2/install/unix, and build the rsaref.a library. The RSAREF
- package has more detailed instructions.
-
- If you don't have an ANSI C compiler you will need the unproto package
- written by Wietse Venema. unproto was posted on comp.sources.misc and
- can be obtained from the various sites that archive this newsgroup
- (volume 23: v23i012 and v23i013) or ftp.win.tue.nl file:
- /pub/programming/unproto4.shar.Z Read the file README in the unproto
- distribution for instructions on how to use unproto. The unix makefile
- for pgp (makefile.unx) contains a few targets for compliling with
- unproto, these assume you have unpacked unproto in a subdirectory
- "unproto" in the pgp "src" directory.
-
-
- Then...
-
- type:
- "make sungcc" for Sun with GNU gcc
- "make suncc" for Sun with cc and unproto
- "make sysv_386" for SVR4 386 with asm primitives
- "make x286" for XENIX/286 with asm primitives and unproto
- "make ultrix" for DEC 4.2BSD Ultrix with gcc
- "make rs6000" for RS6000 AIX
- "make irix_asm" for IRIX with asm primitives
- "make" to list the available platforms
-
- There are more targets in makefile.unx. If your system doesn't have
- a target in makefile.unx you will have to edit the makefile, make
- sure you compile for the correct byte order for your system: define
- HIGHFIRST if your system is big-endian (eg. Motorola 68030).
- There are also some platform-specific parameters in the include file
- "platform.h". Some platforms may have to modify this file.
-
- If all goes well, you will end up with an executable file called "pgp".
-
- Before you install pgp, run these tests:
- (do not create your real public key yet, this is just for testing pgp)
-
- - create a public/secret key pair (enter "test" as userid/password):
- pgp -kg
-
- - add the sample keys from the file "keys.asc" to the public keyring:
- pgp -ka keys.asc
- pgp will ask if you want to sign the keys you are adding, answer yes
- for at least one key.
-
- - do a keyring check:
- pgp -kc
-
- - encrypt pgpdoc1.txt:
- pgp -e pgpdoc1.txt test -o testfile.pgp
-
- - decrypt this file:
- pgp testfile.pgp
-
- this should produce the file "testfile" compare this file with pgpdoc1.txt
-
- If everything went well, install pgp in a bin directory.
-
- Place the documentation, pgpdoc1.txt and pgpdoc2.txt somewhere where
- you can reasonably read it. The software looks for it when running
- (especially generating keys), so someplace reasonably obvious would
- be good. "pgp -kg" will give you full details if it can't find the
- manuals.
-
- Place the man page (pgp.1) in an appropriate spot. If you don't know
- anything about how man pages work, you can make the man page look
- human readable yourself by typing "nroff -man pgp.1 >pgp.man" and
- reading "pgp.man".
-
- Create a subdirectory somewhere in your home directory hierarchy to
- hold your public and private key rings and anything else pgp might need
- (like the language.txt file). The default name PGP assumes is ~/.pgp.
- If you want to use a different name, you must set the environment
- variable "PGPPATH" to point to this place before you use the system.
-
- > IMPORTANT: This directory cannot be shared! It will contain your <
- > personal private keys! <
-
- If you are installing PGP for yourself, copy the files "language.txt",
- "config.txt", and the ".hlp" files from the distribution into this
- subdirectory.
-
- If you are installing PGP system-wide, the directory to use is
- /usr/local/lib/pgp for the config, language and help files.
- This can be changed in fileio.h when compiling. It's the value
- of PGP_SYSTEM_DIR.
-
- Tell PGP the character set and language you wish to use in the config.txt
- file. If you have a terminal that only displays 7-bit ASCII, use
- "charset=ascii" to display an approximation (accents are omitted) of
- extended characters.
-
- >> IMPORTANT: Please read the sections in the man page and manual <<
- >> about vulnerabilities before using this software on a multi- <<
- >> user machine! <<
-
- Now, if you haven't done so yet, GO READ THE MANUAL.
-
-
- ######################################################################
- For VMS:
-
- Read the file readme.vms in the doc subdirectory
-
- ######################################################################
-