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authorBen McGinnes <[email protected]>2018-07-13 12:08:42 +0000
committerBen McGinnes <[email protected]>2018-07-13 12:08:42 +0000
commit1e34141f6770cd8ca243048ec6f78d600bed4262 (patch)
tree7feaeb64a023a8bdd70033592d22be71b2ea612d /lang/python/docs/dita/howto/part03/importing-eff-keys.dita
parentpython bindings howto: dita version (diff)
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python bindings howto: dita versionben/howto-dita
* Numerous updates to bring it back into sync with the official doc. * Especially important since it now looks like the babel thing is a real bug after all and not me doing something stupid.
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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE dita PUBLIC "-//OASIS//DTD DITA Composite//EN" "ditabase.dtd">
+<dita xml:lang="en-GB">
+ <topic id="eff-key-import">
+ <title>Importing Keys</title>
+ <shortdesc>DRAFT VERSION</shortdesc>
+ <body>
+ <p>Importing keys is possible with the <codeph>key_import()</codeph> method and takes one
+ argument which is a bytes literal object containing either the binary or ASCII armoured key
+ data for one or more keys.</p>
+ <p>In the following example a key will be retrieved from the SKS keyservers via the web using
+ the requests module. Since requests returns the content as a bytes literal object, we can
+ then use that directly to import the resulting data into our keybox. In order to demonstrate
+ multiple imports this example searches for all the keys of users at a particular domain
+ name. This time we're using the EFF, since they've always been such good supporters of
+ strong encryption and good security practices.</p>
+ <p>If this holds true then I would expect that some keys I already have will be updated and
+ some others will be added. Most of the keys created most recently and belonging to still
+ active people within the EFF should, if they are following their own recent statements, be
+ revoked. If they are not revoked then it would be best left to the reader to determine
+ whether or not the change in leadership at that organisation indicates a change in their
+ policy of supporting good security practices.</p>
+ <p>
+ <codeblock id="import-key-1" outputclass="language-python">import gpg
+import requests
+
+c = gpg.Context()
+url = "https://sks-keyservers.net/pks/lookup"
+pattern = input("Enter the pattern to search for key or user IDs: ")
+payload = { "op": "get", "search": pattern }
+
+r = requests.get(url, verify=True, params=payload)
+k = c.key_import(r.content)
+
+summary = """
+Total number of keys: {0}
+Total number imported: {1}
+Number of version 3 keys ignored: {2}
+
+Number of imported key objects or updates: {3}
+Number of unchanged keys: {4}
+Number of new signatures: {5}
+Number of revoked keys: {6}
+""".format(k.considered, len(k.imports), k.skipped_v3_keys, k.imported,
+ k.unchanged, k.new_signatures, k.new_revocations)
+
+print(summary)</codeblock>
+ </p>
+ <p>The resulting output in that case, where the search pattern entered was
+ <codeph>@eff.org</codeph> was:</p>
+ <p>
+ <codeblock id="import-key-2" outputclass="language-bourne">Total number of keys: 272
+Total number imported: 249
+Number of version 3 keys ignored: 23
+
+Number of imported key objects or updates: 180
+Number of unchanged keys: 66
+Number of new signatures: 7
+Number of revoked keys: 0</codeblock>
+ </p>
+ <p>The 23 skipped keys all date back to the 1990s, some of which were made very shortly after
+ PGP 2 was first released.</p>
+ <p>
+ <note>Pretty Good Privacy version 2 and above are the only versions with any widespread use.
+ Pretty Good Privacy version 1 had a number of serious security problems, not least of
+ which being that it relied on an encryption algorithm called Bass-O-Matic which was
+ written by Phil Zimmermann. Following feedback on this algorithm, Zimmermann withdrew
+ version 1 and re-implemented version 2 using RSA and IDEA, even though both were subject
+ to software patents at the time (both of those software patents have long since
+ expired).</note>
+ </p>
+ </body>
+ </topic>
+</dita>