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Groups > linux.debian.user > #191505 > unrolled thread
| Started by | David Wright <deblis@lionunicorn.co.uk> |
|---|---|
| First post | 2018-01-24 21:00 +0100 |
| Last post | 2018-01-26 18:00 +0100 |
| Articles | 3 — 2 participants |
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Fingerprint displayed by scp (new host) and in debian-installer David Wright <deblis@lionunicorn.co.uk> - 2018-01-24 21:00 +0100
Re: Fingerprint displayed by scp (new host) and in debian-installer davidson <davidson@freevolt.org> - 2018-01-26 09:10 +0100
Re: Fingerprint displayed by scp (new host) and in debian-installer David Wright <deblis@lionunicorn.co.uk> - 2018-01-26 18:00 +0100
| From | David Wright <deblis@lionunicorn.co.uk> |
|---|---|
| Date | 2018-01-24 21:00 +0100 |
| Subject | Fingerprint displayed by scp (new host) and in debian-installer |
| Message-ID | <vbznc-3VR-13@gated-at.bofh.it> |
The stretch version of scp displays fingerprints using a SHA256 hash, but of course a jessie machine has no idea of what its fingerprint is except using an MD5 hash. A question and suggestion: Is there a way to get stretch scp to show the fingerprint in MD5 when connecting to a new (jessie) host? IIRC the debian-installer only shows the SHA256 fingerprint. It ought to display the MD5 version too, for those people installing over the network with ssh from an older machine. Cheers, David.
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| From | davidson <davidson@freevolt.org> |
|---|---|
| Date | 2018-01-26 09:10 +0100 |
| Subject | Re: Fingerprint displayed by scp (new host) and in debian-installer |
| Message-ID | <vc7fb-Li-3@gated-at.bofh.it> |
| In reply to | #191505 |
On Wed, 24 Jan 2018, David Wright wrote: > The stretch version of scp displays fingerprints using a SHA256 > hash, but of course a jessie machine has no idea of what its > fingerprint is except using an MD5 hash. A question and suggestion: > > Is there a way to get stretch scp to show the fingerprint in MD5 > when connecting to a new (jessie) host? I don't have a jessie host to test this on: $ scp -o FingerprintHash=md5 file_to_copy account@recipient.host:destination_file Does it work? > IIRC the debian-installer only shows the SHA256 fingerprint. It > ought to display the MD5 version too, for those people installing > over the network with ssh from an older machine. > > Cheers, > David. > >
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| From | David Wright <deblis@lionunicorn.co.uk> |
|---|---|
| Date | 2018-01-26 18:00 +0100 |
| Message-ID | <vcfw5-5NZ-29@gated-at.bofh.it> |
| In reply to | #191582 |
On Fri 26 Jan 2018 at 08:30:43 (+0000), davidson wrote:
> On Wed, 24 Jan 2018, David Wright wrote:
>
> >The stretch version of scp displays fingerprints using a SHA256
> >hash, but of course a jessie machine has no idea of what its
> >fingerprint is except using an MD5 hash. A question and suggestion:
> >
> >Is there a way to get stretch scp to show the fingerprint in MD5
> >when connecting to a new (jessie) host?
>
> I don't have a jessie host to test this on:
>
> $ scp -o FingerprintHash=md5 file_to_copy account@recipient.host:destination_file
>
> Does it work?
Yes thanks. Unfortunately it got left out of the man page and there's
no warning about these changes in the release notes.
I should add:
> >IIRC the debian-installer only shows the SHA256 fingerprint. It
> >ought to display the MD5 version too, for those people installing
> >over the network with ssh from an older machine.
… because older versions of ssh don't have the option of
choosing their FingerprintHash at all.
Cheers,
David.
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