Introduction
------------

sha is a simple program that hashes files. It uses the National
Institute of Standards and Technology's Secure Hash Algorithm.
It can use SHA-1, SHA-256, SHA-384, or SHA-512, which generate
respectively, hashes of 160, 256, 384, or 512 bits. sha can be
used in scripts to do, for example, file integrity checking.

Using sha is simple. Just pass the names of one or more files on
the command line. 

You may want to perform a sanity check on sha before relying on
it. A program called "shatest" is built along with sha. If you
run shatest, it will display the results of running the various
SHA algorithms on a set of known test vectors. If the resultant
hash matches what is expected, "PASS" will be displayed. Otherwise
it will display "FAIL."

PERMISSION  UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP     NAME
---------- ----------- ------- ------- ------ ---------- ------------ ----------
drwx------ 65534/65534       0       0 ****** -lhd- 0000 Jun 12 09:31 sha/
-rw------- 65534/65534     720    1373  52.4% -lh5- f691 Jun 11 13:09 sha/COPYRIGHT
-rwx------ 65534/65534    4924    5233  94.1% -lh5- 4064 Jun 12 09:31 sha/COPYRIGHT.info
-rw------- 65534/65534     537    1137  47.2% -lh5- d7b9 Jun 11 13:09 sha/ChangeLog
-rwx------ 65534/65534    4923    5233  94.1% -lh5- 2e9e Jun 12 09:31 sha/ChangeLog.info
-rwxrw-rw- 65534/65534   15915   51741  30.8% -lh5- b07c Jun 12 09:23 sha/sha
-rw------- 65534/65534     661    1539  42.9% -lh5- 7360 Jun 11 13:09 sha/sha.guide
-rwx------ 65534/65534    4930    5233  94.2% -lh5- 40f7 Jun 12 09:31 sha/sha.guide.info
-rwxrw-rw- 65534/65534   12296   42031  29.3% -lh5- 418a Jun 12 09:23 sha/sha1
-rwxrw-rw- 65534/65534   12158   39386  30.9% -lh5- 1f6d Jun 12 09:23 sha/sha256
-rwxrw-rw- 65534/65534   13215   41154  32.1% -lh5- 3047 Jun 12 09:23 sha/sha384
-rwxrw-rw- 65534/65534   13213   41154  32.1% -lh5- 8fbf Jun 12 09:23 sha/sha512
-rwxrw-rw- 65534/65534   16365   52533  31.2% -lh5- 696a Jun 12 09:23 sha/shatest
-rwx------ 65534/65534    7305    7547  96.8% -lh5- 886d Jun 12 09:31 sha.info
---------- ----------- ------- ------- ------ ---------- ------------ ----------
 Total        14 files  107162  295294  36.3%            Jun 12 19:40