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upstream: Specify that the KDF function is bcrypt. Based on github

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PR#214 from rafork, ok markus@, mdoc correction jmc@

OpenBSD-Commit-ID: d8f2853e7edbcd483f31b50da77ab80ffa18b4ef
This commit is contained in:
dtucker@openbsd.org 2020-11-17 11:23:58 +00:00 committed by Darren Tucker
parent 5b9720f9ad
commit 85cceda21f
1 changed files with 5 additions and 3 deletions
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ssh-keygen.1
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@ -1,4 +1,4 @@
.\" $OpenBSD: ssh-keygen.1,v 1.210 2020/10/26 00:39:04 dtucker Exp $ .\" $OpenBSD: ssh-keygen.1,v 1.211 2020/11/17 11:23:58 dtucker Exp $
.\" .\"
.\" Author: Tatu Ylonen <ylo@cs.hut.fi> .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
.\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -35,7 +35,7 @@
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\" .\"
.Dd $Mdocdate: October 26 2020 $ .Dd $Mdocdate: November 17 2020 $
.Dt SSH-KEYGEN 1 .Dt SSH-KEYGEN 1
.Os .Os
.Sh NAME .Sh NAME
@ -274,7 +274,9 @@ This is used by
to generate new host keys. to generate new host keys.
.It Fl a Ar rounds .It Fl a Ar rounds
When saving a private key, this option specifies the number of KDF When saving a private key, this option specifies the number of KDF
(key derivation function) rounds used. (key derivation function, currently
.Xr bcrypt_pbkdf 3 )
rounds used.
Higher numbers result in slower passphrase verification and increased Higher numbers result in slower passphrase verification and increased
resistance to brute-force password cracking (should the keys be stolen). resistance to brute-force password cracking (should the keys be stolen).
The default is 16 rounds. The default is 16 rounds.