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a bunch of formatting fixups...

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John-Mark Gurney 3 years ago
parent
commit
041eafaf6a
6 changed files with 46 additions and 41 deletions
  1. +3
    -3
      content/2014/03/ctf-armeb-debugging.html
  2. +4
    -4
      content/2014/10/building-bhyve-images-using-makefs-and.html
  3. +2
    -2
      content/2015/05/xml-schema-validation-for-command-line.html
  4. +1
    -1
      content/2017/09/adventures-in-autobahnwamp-security.html
  5. +4
    -3
      content/2018/03/unusable-insecurity.html
  6. +32
    -28
      content/2018/07/making-freebsd-magnet-links.html

+ 3
- 3
content/2014/03/ctf-armeb-debugging.html View File

@@ -22,7 +22,7 @@ r261788), but that didn't help as there is no kernel gdb support on
armeb. As I'm doing this debugging over the network, I can't dump a
core.

I didn't feel like hand decoding a struct vm_page, so I thought of other
I didn't feel like hand decoding a `struct vm_page`, so I thought of other
methods, and one way is to use CTF to parse the data type and decode the
data. I know python and ctypes, so I decided to wrap libctf and see
what I could do.
@@ -54,7 +54,7 @@ ValueError: '/tmp/avila.ctf': File is not in CTF or ELF format
```

Hmm, why is that? Well, it turns out that the endian of the CTF data
is wrong. The magic is `cf f1`, but the magic on amd64 is f1 cf, it's
is wrong. The magic is `cf f1`, but the magic on amd64 is `f1 cf`, it's
endian swapped. That's annoying. After spending some time trying to
build an cross shared version of libctf, I find that it has the same
issue.
@@ -87,7 +87,7 @@ arch's pointer sizes for `CTF_K_POINTER` types, which means that pointers
appear to be 8 bytes in size instead of the correct 4 bytes. A little
more hacking on the ctf.py script to force all pointers to be 4 bytes,
and a little help to convert ddb output to a string and finally, I have
a dump of the struct vm_page that I was trying to get all along:
a dump of the <code>struct&nbsp;vm_page</code> that I was trying to get all along:
```
{'act_count': '\x00',
'aflags': '\x00',


+ 4
- 4
content/2014/10/building-bhyve-images-using-makefs-and.html View File

@@ -16,7 +16,7 @@ testing.

EDIT: Anish Gupta did the work that Neel Natu commited. Thanks Anish!

I had previously built images using makefs and mkimg for a CF card for
I had previously built images using `makefs` and `mkimg` for a CF card for
use in another machine, so being able to build images to use with bhyve
makes sense.

@@ -35,9 +35,9 @@ along with a completed buildworld and buildkernel. Then follow these steps:
</code></pre>
3. Make a directory with your custom configuration files. The basics
are `/etc/rc.conf` and `/etc/fstab` and you might want `/firstboot` on
there too. You will also need a METALOG file which contains the
permissions for the files. This is just a standard mtree file, so
you could use mtree to generate this instead of creating it by hand.
there too. You will also need a `METALOG` file which contains the
permissions for the files. This is just a standard `mtree` file, so
you could use `mtree` to generate this instead of creating it by hand.
The file contents are below.
4. Build the ufs image using the `makeroot.sh` script in the src tree at `tools/tools/makeroot/makeroot.sh`:
<pre class="fullwidth"><code>


+ 2
- 2
content/2015/05/xml-schema-validation-for-command-line.html View File

@@ -15,12 +15,12 @@ to specify a single schema file. If you have an XML document that
contains more than one name space this doesn't work too well as often,
each name space is in a separate schema file.

The XML document has xmlns attributes which use a URI as the identifier.
The XML document has `xmlns` attributes which use a URI as the identifier.
These URIs are for identifing it, and not a URL, so not able to be used.
In fact, different cases in the URIs specify different name spaces even
in the "host" part, though that is not the case with URLs. In order for
validators to find the schema, the attribute
[xsi:schemaLocation](http://www.w3.org/TR/xmlschema-1/#schema-loc) is
<code>[xsi:schemaLocation](http://www.w3.org/TR/xmlschema-1/#schema-loc)</code> is
used to map the name space URIs to the URLs of the schema.

The `xsi:schemaLocation` mapping is very simple. It is simply a white


+ 1
- 1
content/2017/09/adventures-in-autobahnwamp-security.html View File

@@ -51,7 +51,7 @@ is WAMP-Cryptosign.
After I got basic functionality working to make sure things would be
workable w/ this framework, I decided to start working on the
authentication piece. First problem I ran into was that the AutoBahn|JS
library does not support TLS channel binding. There is a good read the
library does not support TLS channel binding. There is a good reason the
library doesn't support it, and it's for a very bad reason. There is
no support in the browser [WebSocket API](https://www.w3.org/TR/websockets/)
to query the channel binding information necessary. The fact that


+ 4
- 3
content/2018/03/unusable-insecurity.html View File

@@ -66,9 +66,10 @@ I'm clearly not the only one that has had issues configuring S3 buckets.
The end of 2017 has shown a large number of organizations fail to
properly secure their S3 buckets, leaving many terabytes of data open
for public download. It is unacceptable that such a service is so
difficult to configure. The site https://s3stupidity.com/ lists the
large number of breaches, many of which are by large companies who
should have the technical chops (and $$) to properly configure it.
difficult to configure. The site
[https://s3stupidity.com/](https://s3stupidity.com/) lists the large
number of breaches, many of which are by large companies who should
have the technical chops (and $$) to properly configure it.

Security controls need to be simple and clear. Their descriptions need
to be accurate and concise in what they do, and how they do it. Amazon


+ 32
- 28
content/2018/07/making-freebsd-magnet-links.html View File

@@ -18,52 +18,52 @@ were command line based. The other was there was/is no tool for
extracting the info hash and building the magnet link. There may be
tools now, but I couldn't find any when I started 3 years ago.

The following steps are based upon the recent release of FreeBSD 11.2-R,
The following steps are based upon the recent release of FreeBSD 11.2&#x2011;R,
adjust as necessary.

1. Fetch FreeBSD into a directory (I create a per release directory). There
<ol>
<li>Fetch FreeBSD into a directory (I create a per release directory). There
are a few directories that you have mirror, I use wget for this. The
mirroring feature for wget isn't great. After each command I have to
remove the `CHECKSUM.SHA256`, `CHECKSUM.SHA512` and `index.html*` files.
remove the <code>CHECKSUM.SHA256</code>, <code>CHECKSUM.SHA512</code> and <code>index.html*</code> files.
<pre class="fullwidth"><code>
$ wget -c -r -l 1 -nd --limit-rate=800k https://download.freebsd.org/ftp/releases/ISO-IMAGES/11.2/
$ wget -c -r -l 1 -nd --limit-rate=800k https://download.freebsd.org/ftp/releases/VM-IMAGES/11.2-RELEASE/aarch64/Latest/
$ wget -c -r -l 1 -nd --limit-rate=800k https://download.freebsd.org/ftp/releases/VM-IMAGES/11.2-RELEASE/amd64/Latest/
$ wget -c -r -l 1 -nd --limit-rate=800k https://download.freebsd.org/ftp/releases/VM-IMAGES/11.2-RELEASE/i386/Latest/
</code></pre>
2. Fetch the signature files:
<li>Fetch the signature files:
<pre class="fullwidth"><code>
$ wget https://www.freebsd.org/releases/11.2R/CHECKSUM.SHA512-FreeBSD-11.2-RELEASE-{amd64,i386,powerpc,powerpc-powerpc64,sparc64,arm64-aarch64}.asc
$ wget https://www.freebsd.org/releases/11.2R/CHECKSUM.SHA512-FreeBSD-11.2-RELEASE-{amd64,i386,arm64-aarch64}-vm.asc
$ wget https://www.freebsd.org/releases/11.2R/CHECKSUM.SHA512-FreeBSD-11.2-RELEASE-arm-armv6-{BANANAPI,BEAGLEBONE,CUBIEBOARD,CUBIEBOARD2,CUBBOX-HUMMINGBOARD,GUMSTIX,PANDABOARD,RPI-B,RPI2,WANDBOARD}.asc
</code></pre>
3. Verify the GPG key that signed the above files. This is usually Glen
<li>Verify the GPG key that signed the above files. This is usually Glen
Barber's key, but not always. I have met and verified his fingerprint
in person, If you have verified someone's key who has signed Glen's
key, that is another good way.
4. Verify the checksum files:
<li>Verify the checksum files:
<pre class="fullwidth"><code>
$ for i in *.asc; do gpg --verify $i; done
You should see a bunch of lines like:
Warning: using insecure memory!
gpg: Signature made Fri Jun 22 09:33:50 2018 PDT
gpg: using RSA key 0x031458A5478FE293
gpg: Good signature from "Glen Barber <gjb@FreeBSD.org>" [full]
gpg: aka "Glen Barber <glen.j.barber@gmail.com>" [full]
gpg: aka "Glen Barber <gjb@glenbarber.us>" [full]
gpg: aka "Glen Barber <gjb@keybase.io>" [unknown]
gpg: Good signature from "Glen Barber &lt;gjb@FreeBSD.org&gt;" [full]
gpg: aka "Glen Barber &lt;glen.j.barber@gmail.com&gt;" [full]
gpg: aka "Glen Barber &lt;gjb@glenbarber.us&gt;" [full]
gpg: aka "Glen Barber &lt;gjb@keybase.io&gt;" [unknown]
gpg: WARNING: not a detached signature; file 'CHECKSUM.SHA512-FreeBSD-11.2-RELEASE-amd64-vm' was NOT verified!
</code></pre>
The last line can be ignored. The non-`.asc` files were d/l'd and will
not be used. Make sure that all of the files report Good signature.
5. In the past I have used BitTornado for other things, so I ended up
</code></pre>The last line can be ignored. The non-<code>.asc</code> files were d/l'd and will
not be used. Make sure that all of the files report <code>Good&nbsp;signature</code>.
<li>In the past I have used BitTornado for other things, so I ended up
using it as the basis to make the tool for creating trackerless torrent
files. The modifications were simple. It appears that the original
BitTornado CVS tree is off-line (anyways, it was served insecurely),
but it looks like
[effigies/BitTornado](https://github.com/effigies/BitTornado) is
<a href="https://github.com/effigies/BitTornado">effigies/BitTornado</a> is
similar enough that it could be modified and used. I copied
`btmakemetafile.py` to `btmaketrackerless.py` and applied the following
<code>btmakemetafile.py</code> to <code>btmaketrackerless.py</code> and applied the following
patch:
<pre class="fullwidth"><code>
$ diff -u btmakemetafile.py btmaketrackerless.py
@@ -73,11 +73,11 @@ adjust as necessary.
def prog(amount):
print '%.1f%% complete\r' % (amount * 100),

-if len(argv) < 3:
+if len(argv) < 2:
-if len(argv) &lt; 3:
+if len(argv) &lt; 2:
a,b = split(argv[0])
- print 'Usage: ' + b + ' <trackerurl> <file> [file...] [params...]'
+ print 'Usage: ' + b + ' <file> [file...] [params...]'
- print 'Usage: ' + b + ' &lt;trackerurl&gt; &lt;file&gt; [file...] [params...]'
+ print 'Usage: ' + b + ' &lt;file&gt; [file...] [params...]'
print
print formatDefinitions(defaults, 80)
print_announcelist_details()
@@ -97,9 +97,9 @@ adjust as necessary.

</code></pre>
If you notice, the only thing that is done is to drop the first argument,
and instead of passing it into `make_meta_file`, a `None` is passed
and instead of passing it into <code>make_meta_file</code>, a <code>None</code> is passed
instead. This will simply not add trackers to the torrent file.
6. I then run the following script to verify the downloaded files, and
<li>I then run the following script to verify the downloaded files, and
generate the torrent files:
<pre class="fullwidth"><code>
$ cat cmp.sh
@@ -112,7 +112,7 @@ adjust as necessary.
# wget https://www.freebsd.org/releases/11.2R/CHECKSUM.SHA512-FreeBSD-11.2-RELEASE-{amd64,i386,arm64-aarch64}-vm.asc
# wget https://www.freebsd.org/releases/11.2R/CHECKSUM.SHA512-FreeBSD-11.2-RELEASE-arm-armv6-{BANANAPI,BEAGLEBONE,CUBIEBOARD,CUBIEBOARD2,CUBBOX-HUMMINGBOARD,GUMSTIX,PANDABOARD,RPI-B,RPI2,WANDBOARD}.asc

grep -h '^SHA512' CHECK*.asc | sed -e 's/SHA512 (\(.*\)) = \(.*\)/\2 \1/' | sort -k 2 > sha512.from.asc
grep -h '^SHA512' CHECK*.asc | sed -e 's/SHA512 (\(.*\)) = \(.*\)/\2 \1/' | sort -k 2 &gt; sha512.from.asc

while read hash fname; do
if [ -e "$fname" ]; then
@@ -132,9 +132,9 @@ adjust as necessary.
echo missing "$fname"
exit 1
fi
done < sha512.from.asc
done &lt; sha512.from.asc
</code></pre>
7. Once all the torrents have been generated, I then make the magnet
<li>Once all the torrents have been generated, I then make the magnet
links:
<pre class="fullwidth"><code>
$ cat btmakemagnet.sh
@@ -156,8 +156,12 @@ adjust as necessary.
}'
done
</code></pre>
8. I then create the magnet links file, and update the
[Torrents](https://wiki.freebsd.org/Torrents) wiki page.
<li>I then create the magnet links file, and update the
<a href="https://wiki.freebsd.org/Torrents">Torrents</a> wiki page.
</ol>

<s>Sorry about the code formatting. I don't know how to make it look better
in blogger.</s>
in blogger.</s><label for="sn-blogger" class="margin-toggle
sidenote-number"></label><input type="checkbox" id="sn-blogger"
class="margin-toggle"/><span class="sidenote" id="sn-blogger">The blog
no longer uses blogger.</span>

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