[Bug 2442] New: comment is not set to the filename for identity files with already entered passphrase

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=2442

            Bug ID: 2442
           Summary: comment is not set to the filename for identity files
                    with already entered passphrase
           Product: Portable OpenSSH
           Version: 6.7p1
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: ssh-add
          Assignee: unassigned-bugs at mindrot.org
          Reporter: vincent-openssh at vinc17.net

With OpenSSH_6.7p1 under Debian/unstable, when I use ssh-add with
multiple filenames to add several identities at once, the comment is
set to the filename for the first identity, but not for the following
ones. That is, for these additional identities, "ssh-add -L" and
"ssh-add -l" output "rsa w/o comment" instead of the filename.

I suppose that the cause of this bug is that for these additional
identities, the passphrase was already entered (I use the same one for
each identity) and sshkey_parse_private_pem_fileblob() in sshkey.c sets
the comment to "rsa w/o comment", which is rather uninformative. In
this opposite case, add_file() in ssh-add.c sets the comment with:

        if (comment == NULL)
                comment = xstrdup(filename);

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