MD5(1)MD5(1)NAMEmd5 - calculate a message-digest fingerprint (checksum) for a file
SYNOPSISmd5 [ -t | -x | -sstring | filename(s) ]
DESCRIPTIONmd5 takes as input a message of arbitrary length and produces as output
a 128-bit "fingerprint" or "message digest" of the input. It is con‐
jectured that it is computationally infeasible to produce two messages
having the same message digest, or to produce any message having a
given prespecified target message digest. The MD5 algorithm is
intended for digital signature applications, where a large file must be
"compressed" in a secure manner before being encrypted with a private
(secret) key under a public-key cryptosystem such as RSA.
OPTIONS
The following four options may be used in any combination, except that
filename(s) must be the last objects on the command line.
-sstring prints a checksum of the given "string".
-t runs a built-in time trial.
-x runs a built-in test script.
filename(s) prints a checksum(s) for each of the files.
SEE ALSOsum(1)
RFC 1321 describes in detail the MD2, MD4, and MD5 message-digest algo‐
rithms.
ACKNOWLEDGEMENTS
This program is placed in the public domain for free general use by RSA
Data Security.
Feb 14, 1994 MD5(1)