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-rw-r--r--sbin/md5/md5.124
1 files changed, 19 insertions, 5 deletions
diff --git a/sbin/md5/md5.1 b/sbin/md5/md5.1
index 94cdf8495719..6fa039377b43 100644
--- a/sbin/md5/md5.1
+++ b/sbin/md5/md5.1
@@ -1,9 +1,9 @@
.\" $FreeBSD$
-.Dd October 17, 2015
+.Dd April 22, 2016
.Dt MD5 1
.Os
.Sh NAME
-.Nm md5 , sha1 , sha256 , sha384 , sha512, rmd160
+.Nm md5 , sha1 , sha256 , sha384 , sha512, sha512t256, rmd160
.Nd calculate a message-digest fingerprint (checksum) for a file
.Sh SYNOPSIS
.Nm md5
@@ -31,6 +31,11 @@
.Op Fl c Ar string
.Op Fl s Ar string
.Op Ar
+.Nm sha512t256
+.Op Fl pqrtx
+.Op Fl c Ar string
+.Op Fl s Ar string
+.Op Ar
.Nm rmd160
.Op Fl pqrtx
.Op Fl c Ar string
@@ -38,7 +43,7 @@
.Op Ar
.Sh DESCRIPTION
The
-.Nm md5 , sha1 , sha256 , sha384 , sha512
+.Nm md5 , sha1 , sha256 , sha384 , sha512, sha512t256
and
.Nm rmd160
utilities take as input a message of arbitrary length and produce as
@@ -78,8 +83,17 @@ found which is faster than a brute-force search, placing the security of
.Tn SHA-1
in doubt.
.Pp
-It is recommended that all new applications use
+.Tn SHA-512t256
+is a version of
+.Tn SHA-512
+truncated to only 256 bits.
+On 64-bit hardware, this algorithm is approximately 50% faster than
.Tn SHA-256
+but with the same level of security.
+The hashes are not interchangeable.
+.Pp
+It is recommended that all new applications use
+.Tn SHA-512
instead of one of the other hash functions.
.Pp
The following options may be used in any combination and must
@@ -114,7 +128,7 @@ Run a built-in test script.
.El
.Sh EXIT STATUS
The
-.Nm md5 , sha1 , sha256 , sha512
+.Nm md5 , sha1 , sha256 , sha512, sha512t256
and
.Nm rmd160
utilities exit 0 on success,