From owner-freebsd-questions@freebsd.org Wed Apr 8 14:27:41 2020 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 780F92B3B6D for ; Wed, 8 Apr 2020 14:27:41 +0000 (UTC) (envelope-from dave.mehler@gmail.com) Received: from mail-pf1-x42a.google.com (mail-pf1-x42a.google.com [IPv6:2607:f8b0:4864:20::42a]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 48y67J5XCPz4FMc for ; Wed, 8 Apr 2020 14:27:40 +0000 (UTC) (envelope-from dave.mehler@gmail.com) Received: by mail-pf1-x42a.google.com with SMTP id c20so2459015pfi.7 for ; Wed, 08 Apr 2020 07:27:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=LVPPdwEqvlT0VHo7vLkBwmzd8oq3xflzsB7y1n6MgIQ=; b=JHgnzdr2Nbe7RpRAjNWqH0MUvUQ0NlXBHpLZ2bBDT8RY98BfgNcLfGv7u7hT5sdzB2 2DkBIXgOoTla+hEOqgNwKh/mIrlyObcgGzQtdPHO6KGEcOGuTKJYppl3nA+G9CAkF/C1 VWBx9uqjT/IGiXK8IMQyty0FO/ur6cDFIVnpB/oRbPx4HKFg+EiJcyy/qS7PLLKh/BRz JxZ/fpco0gFx11uK3Sa8SKe25pctaU1v3Tu+tIQSGQZghq8OBYs95edXS9rwHfsHkux8 2jrEEvScnZdpgxO510MryLWMU4A1BVEzuLvefne4CkJbsL10eI3bs8bd0dMxaClJI1w8 VLxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=LVPPdwEqvlT0VHo7vLkBwmzd8oq3xflzsB7y1n6MgIQ=; b=le2VroxH3TN2cID2gbxRQdLBCVfpfo8Fh2iocYq4ncxuarSdYuB3DXWH7xOHwE9Zfx R4EGV9MZpBzQ6GN04jh7Uwf+40+6SImQCLzVi3FQyLw+VKJF94VxNQRaMbsTZRu28HyU brbxXqkV0yJzNmNBhJek4Vqv+vJUgjKB5s39uvzPiFWPKDU30IAS43JRq2Y+WMTOjhkw 4nHqrMULGacq++Kfmaw0m/IzXlayNn6/6uAXu4EIK0TRSyEFgv2pX6E+8k++1W3qDL90 +xVrxkuCLP4GwecHmpAQnYV4Mc0J5uCJbbbFWn0tMIb0HnTkNjx3JZVYUWp9BnayXXWY X/4A== X-Gm-Message-State: AGi0Pua741uBA4SeBtzLlVZ8BStXTu32YfRyICbHWCFyxI9zzd4C4rjk DUr2p9l7g3tRlqCwKx90kxuYv8+PFm93HhiAX6jE3mQn X-Google-Smtp-Source: APiQypIufGRg7xnAgo1CyYZ3lpK7qFvJ4Vdld8FwZ8iJeKJWydpkqjVPAEeOCF+GnuGkxH0JuKHaUz2gbVlzJAXWhA0= X-Received: by 2002:a92:d8c8:: with SMTP id l8mr8496865ilo.259.1586354857775; Wed, 08 Apr 2020 07:07:37 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a4f:ce15:0:0:0:0:0 with HTTP; Wed, 8 Apr 2020 07:07:37 -0700 (PDT) In-Reply-To: <4b14011e-3e7e-fbb7-73cf-7dc3e1429906@hedeland.org> References: <4b14011e-3e7e-fbb7-73cf-7dc3e1429906@hedeland.org> From: David Mehler Date: Wed, 8 Apr 2020 10:07:37 -0400 Message-ID: Subject: Re: difference in sshd protocol options To: Per Hedeland Cc: freebsd-questions@freebsd.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 48y67J5XCPz4FMc X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=JHgnzdr2; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of davemehler@gmail.com designates 2607:f8b0:4864:20::42a as permitted sender) smtp.mailfrom=davemehler@gmail.com X-Spamd-Result: default: False [-3.00 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; FREEMAIL_FROM(0.00)[gmail.com]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; RCVD_COUNT_TWO(0.00)[2]; IP_SCORE_FREEMAIL(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[a.2.4.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; IP_SCORE(0.00)[ip: (-8.67), ipnet: 2607:f8b0::/32(-0.33), asn: 15169(-0.43), country: US(-0.05)]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; TAGGED_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com.dwl.dnswl.org : 127.0.5.0] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 08 Apr 2020 14:27:41 -0000 Hello Per Hedeland Thanks. If I'm understanding right the key type ssh-rsa is what is needed when an ssh key is generated with ssh-keygen -t rsa? Thanks. Dave On 4/8/20, Per Hedeland wrote: > On 2020-04-08 07:59, David Mehler wrote: >> Hello, >> >> I just went through an interesting go tonight getting an android file >> manager to connect via sftp to my FreeBSD 12.1 sshd server. I've got >> two questions. Refering to the sshd_config man page the >> HostKeyAlgorithms option and the PubkeyAcceptedKeyTypes options is >> there a difference between the options (both of which appear in the >> default) ssh-rsa and ssh-rsa-cert-v01@openssh.com? > > Yes, see e.g. > https://github.com/openssh/openssh-portable/blob/master/PROTOCOL.certkeys > - ssh-rsa uses just a "raw" key, while ssh-rsa-cert-v01@openssh.com > uses a certificate (OpenSSH-specific design, a simpler variant than > the common x.509 style), i.e. basically a key signed with some other > trusted (CA) key. The certificate allows for specifiying CA keys > instead of individual host and user keys in ~/.ssh/known_hosts > ~/.ssh/authorized_keys, respectively. > > --Per Hedeland >