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authorRob Austein <sra@hactrn.net>2020-09-13 23:04:30 +0000
committerRob Austein <sra@hactrn.net>2020-09-13 23:04:30 +0000
commitb092ffbcbe2c9398494f7dc9db6f0796971633e0 (patch)
tree6fabf690f1ebf485a9fea9af5298e44ad2a59a3e /raw-wiki-dump/GitRepositories%2Fuser%2Fsra%2Faes-keywrap
parent9d927e49d9c10fc16c6dfa4a2a96cdb6216e4e2b (diff)
Import Cryptech wiki dump
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+{{{
+#!htmlcomment
+
+This page is maintained automatically by a script. Don't modify this page by hand,
+your changes will just be overwritten the next time the script runs. Talk to your
+Friendly Neighborhood Repository Maintainer if you need to change something here.
+
+}}}
+
+{{{
+#!html
+<h1>AES key wrap</h1>
+
+<p>A preliminary implementation of AES Key Wrap, RFC 5649 flavor, using
+Cryptlib to supply the AES ECB transformations.</p>
+
+<p>aes_keywrap.py contains two different Python implementations:</p>
+
+<ol>
+<li><p>An implementation using Python longs as 64-bit integers; and</p></li>
+<li><p>An implementation using Python arrays.</p></li>
+</ol>
+
+<p>The first of these is the easiest to understand, as it can just do
+(long) integer arithmetic and follow the specification very closely.
+The second is closer to what one would do to implement this in an
+assembly language like C.</p>
+
+<p>aes_keywrap.[ch] is a C implementation. The API for this is not yet
+set in stone.</p>
+
+<p>All three implementations include test vectors.</p>
+
+<p>The two implementations based on byte arrays use shift and mask
+operations to handle the two numerical values ("m" and "t") which
+require byte swapping on little endian hardware; this is not the most
+efficient implementation possible, but it's portable, and will almost
+certainly be lost in the noise under the AES operations.</p>
+}}}
+
+[[RepositoryIndex(format=table,glob=user/sra/aes-keywrap)]]
+
+|| Clone `https://git.cryptech.is/user/sra/aes-keywrap.git` ||