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[Bug 2041] New: Check for SSHFP when certificate is offered.

 

 

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bugzilla-daemon at mindrot

Aug 31, 2012, 2:48 AM

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[Bug 2041] New: Check for SSHFP when certificate is offered.

https://bugzilla.mindrot.org/show_bug.cgi?id=2041

Priority: P5
Bug ID: 2041
Assignee: unassigned-bugs [at] mindrot
Summary: Check for SSHFP when certificate is offered.
Severity: enhancement
Classification: Unclassified
OS: All
Reporter: ondrej [at] caletka
Hardware: All
Status: NEW
Version: 6.1p1
Component: ssh
Product: Portable OpenSSH

Created attachment 2185
--> https://bugzilla.mindrot.org/attachment.cgi?id=2185&action=edit
Check for SSHFP when certificate is offered.

When the sshd offers a certificate to client (which is default, when
such a certificate is configured), the client refuses to do a SSHFP
validation for the key embedded in the certificate.

This patch fixes this by dropping certificate for the purpose of
checking SSHFP records, yet retaining certificate for other checks if
SSHFP authentication fails. It is therefore possible to fall back to
certificate authentication when for instance client does not have a
DNSSEC-enabled connectivity.

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