[unix-history] / sbin / md5 / md5.1

.TH MD5 1 "Feb 14, 1994"
.SH NAME
md5 \- calculate a message-digest fingerprint (checksum) for a file
.SH SYNOPSIS
.B md5
[ -t | -x | -sstring | filename(s) ]
.SH DESCRIPTION
.B md5
takes as input a message of arbitrary length and produces
as output a 128-bit "fingerprint" or "message digest" of the input.
It is conjectured 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
.I RSA.
.SH OPTIONS
The following four options may be used in any combination, except
that
.B "filename(s)"
must be the last objects on the command line.
.in +5
.PP
.B -sstring
prints a checksum of the given "string".
.PP
.B -t
runs a built-in time trial.
.PP
.B -x
runs a built-in test script.
.PP
.B filename(s)
prints a checksum(s) for each of the files.
.SH "SEE ALSO"
.BR sum (1)
.PP
RFC 1321 describes in detail the MD2, MD4, and MD5 message-digest algorithms.
.SH ACKNOWLEDGEMENTS
This program is placed in the public domain for free general use by
RSA Data Security.
Commit	Line	Data
2b269b96 PHK	1	.TH MD5 1 "Feb 14, 1994"
	2	.SH NAME
	3	md5 \- calculate a message-digest fingerprint (checksum) for a file
	4	.SH SYNOPSIS
	5	.B md5
	6	[ -t \| -x \| -sstring \| filename(s) ]
	7	.SH DESCRIPTION
	8	.B md5
	9	takes as input a message of arbitrary length and produces
	10	as output a 128-bit "fingerprint" or "message digest" of the input.
	11	It is conjectured that it is computationally infeasible to produce
	12	two messages having the same message digest, or to produce any
	13	message having a given prespecified target message digest.
	14	The MD5 algorithm is intended for digital signature applications, where a
	15	large file must be "compressed" in a secure manner before being
	16	encrypted with a private (secret) key under a public-key cryptosystem
	17	such as
	18	.I RSA.
	19	.SH OPTIONS
	20	The following four options may be used in any combination, except
	21	that
	22	.B "filename(s)"
	23	must be the last objects on the command line.
	24	.in +5
	25	.PP
	26	.B -sstring
	27	prints a checksum of the given "string".
	28	.PP
	29	.B -t
	30	runs a built-in time trial.
	31	.PP
	32	.B -x
	33	runs a built-in test script.
	34	.PP
	35	.B filename(s)
	36	prints a checksum(s) for each of the files.
	37	.SH "SEE ALSO"
	38	.BR sum (1)
	39	.PP
	40	RFC 1321 describes in detail the MD2, MD4, and MD5 message-digest algorithms.
	41	.SH ACKNOWLEDGEMENTS
	42	This program is placed in the public domain for free general use by
	43	RSA Data Security.