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author | delphij <delphij@FreeBSD.org> | 2015-04-14 00:27:54 +0000 |
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committer | delphij <delphij@FreeBSD.org> | 2015-04-14 00:27:54 +0000 |
commit | 0f18b563c9e34f14aa27943ac4e0b46a590a82fe (patch) | |
tree | aa6c2453af3e6a71acf7ece1a66e95647f87f44c /sbin/md5 | |
parent | 30e912566bf8b35a9009bf38e3823ce914e113f4 (diff) | |
download | FreeBSD-src-0f18b563c9e34f14aa27943ac4e0b46a590a82fe.zip FreeBSD-src-0f18b563c9e34f14aa27943ac4e0b46a590a82fe.tar.gz |
MFC r266417 (bjk):
Assorted updates to md5.1
Note that the -c argument's parameter is compared against the digest of
the file, not the file. [1]
Update the "current time" parentheticals for notes about reversing
and colliding the hash functions. [1]
Some general mdoc updates.
PR: docs/188043 [1]
Submitted by: Jamie Landeg-Jones [1]
Diffstat (limited to 'sbin/md5')
-rw-r--r-- | sbin/md5/md5.1 | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/sbin/md5/md5.1 b/sbin/md5/md5.1 index 04efa37..77c40a1 100644 --- a/sbin/md5/md5.1 +++ b/sbin/md5/md5.1 @@ -1,5 +1,5 @@ .\" $FreeBSD$ -.Dd July 31, 2012 +.Dd May 17, 2014 .Dt MD5 1 .Os .Sh NAME @@ -63,12 +63,12 @@ concerned, and should not be relied upon to produce unique outputs. This also means that .Tn MD5 should not be used as part of a cryptographic signature scheme. -At the current time (2009-01-06) there is no publicly known method to +At the current time (2014-05-17) there is no publicly known method to .Dq reverse MD5, i.e., to find an input given a hash value. .Pp .Tn SHA-1 -currently (2009-01-06) has no known collisions, but an attack has been +currently (2014-05-17) has no known collisions, but an attack has been found which is faster than a brute-force search, placing the security of .Tn SHA-1 in doubt. @@ -83,15 +83,15 @@ The hexadecimal checksum of each file listed on the command line is printed after the options are processed. .Bl -tag -width indent .It Fl c Ar string -Compare files to this md5 string. -(Note that this option is not yet useful if multiple files are specified.) +Compare the digest of the file against this string. +.Pq Note that this option is not yet useful if multiple files are specified. .It Fl s Ar string Print a checksum of the given .Ar string . .It Fl p Echo stdin to stdout and append the checksum to stdout. .It Fl q -Quiet mode - only the checksum is printed out. +Quiet mode \(em only the checksum is printed out. Overrides the .Fl r option. @@ -114,7 +114,9 @@ and .Nm rmd160 utilities exit 0 on success, 1 if at least one of the input files could not be read, -and 2 if at least one file does not have the same hash as the -c option. +and 2 if at least one file does not have the same hash as the +.Fl c +option. .Sh SEE ALSO .Xr cksum 1 , .Xr md5 3 , |