SHA(1)SHA(1)NAMEsha - file hashing utility
SYNOPSISsha [-12345Vh] [file ...]
DESCRIPTIONsha is a simple program that hashes files. It uses the National Instiā
tute 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.
OPTIONS-1 Use SHA-1, which produces a 160-bit hash (40 hex digits).
-2 Use SHA-256, which produces a 256-bit hash (64 hex digits).
-3 Use SHA-384, which produces a 384-bit hash (96 hex digits).
-5 Use SHA-512, which produces a 512-bit hash (128 hex digits).
-V Display version information.
-h Display help summary.
file ...
One or more files to hash. If no files are given, stdin is
hashed.
If neither -1, -2, -3, or -5 are given, then SHA-1 is used. (But see
note about SHA_DEFAULT below.)
ENVIRONMENT
SHA_DEFAULT
The default hash algorithm to use. ``1'' denotes SHA-1, ``2''
denotes SHA-256, ``3'' denotes SHA-384, and ``5'' denotes
SHA-512. Only the first character is significant. If not
defined, SHA-1 is the default.
August 19, 2001 SHA(1)