src/usr.bin/cksum/cksum.1 - diff

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Diff for /src/usr.bin/cksum/Attic/cksum.1 between version 1.10 and 1.11

version 1.10, 1999/07/21 01:25:42

version 1.11, 2000/03/05 20:09:20

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.Op Ar file ...

.Sh DESCRIPTION

The

.Nm

.Nm cksum

utility writes to the standard output three whitespace separated

fields for each input file.

These fields are a checksum

Line 64

The

.Nm sum

utility is identical to the

.Nm

.Nm cksum

utility, except that it defaults to using historic algorithm 1, as

described below.

It is provided for compatibility only.

Line 154

.Ed

.Pp

The

.Nm

.Nm cksum

and

.Nm sum

utilities exit 0 on success or >0 if an error occurred.

.Sh WARNING

Do not use

.Nm sum

.Nm cksum

.Nm

.Nm sum

to detect hostile binary modifications. An attacker

to detect hostile binary modifications.

can trivially produce backdoored daemons which have the same CRC as the

An attacker can trivially produce backdoored daemons which have the same

standard versions. Use a cryptographic checksum (such as MD5) instead.

CRC as the standard versions.

Use a cryptographic checksum (such as MD5) instead.

.Sh SEE ALSO

.Xr md5 1 ,

.Xr rmd160 1 ,

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.Re

.Sh STANDARDS

The

.Nm

.Nm cksum

utility is compliant with the

.St -p1003.2-92

specification.

.Sh HISTORY

The

.Nm

.Nm cksum

utility appeared in

.Bx 4.4 .

.\" .Pp

.\" The

.\" .Nm sum

.\" utility appeared in

.\" .Bx ?.?

.\" and

.\" .At V .