-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Aloha!
Rob Austein wrote: >> After this the big thing I can do is the streaming interface I've >> been talking about. > ... > > Sounds cool, but not sure it helps for specific case of AES keywrap. > You might want to look at sw/libhal/aes_keywrap.c (or the equivalent > Python implementation in the unit tests) as well as RFC 5649. I'm fairly certain I was doing that, see mail from Yesterday: "Looking at the code for aes_keywrap in: https://trac.cryptech.is/browser/sw/libhal/aes_keywrap.c The inner processing loop is at line number 199 (or 207)...." > Basic problem I see is that the input to each ECB round in AES > keywrap is a composite of two 64-bit fields, one of which is > constructed by XORing a counter with 64-bits of the output of the > previous round. I see no obvious way to stream this. > > One could of course use your streaming approach if the core were > performing the complete AES keywrap transform rather than just ECB. > :) Yes. And I think that might be the key here. I'll look a bit harder at RFC 5649. - -- Med vänlig hälsning, Yours Joachim Strömbergson - Assured AB ======================================================================== -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBCAAGBQJbBZafAAoJEF3cfFQkIuyN+H8P/2lIHy1SUmlJ/eiY/eKN1d1O y0V/U6NMIg6X4KpZ7JRDf+iZqXsG0Oeae8TbU12r6G3dw3gEgPMolr0Jd3ZMwiNQ wsq4dPUs0UzyNiw+4GXejyPELE2ngJxVKS3WFF0O/s58fmH8SDJa91TcYFE3Bstn W2G2AXr5uTmH4sQZh7FqD+wxxibsrewt3JsWX9XG4ODlGuAG+SK+FmqOIYzjgnAV Z2jcbyJ/yl0oi4qm6m+sCsRjYDyVHXN9HrGf/5tGWzZ4el/X/ln6nBZMj2mvZgmi GcsfDNyH3+dGxFnjvS8uk3hXY5IUjxkJMB18BzuAUHFk5KYZkmMOw22kr1ePr3X+ jiuQe516cVRe5G9H42EqfegqLavtWFfbBPMJTomkvEPY+GRejAwz4QrIVaTuX/iC WvT0YO2zotsjiwn5XZ12wk6N3zyFaWVuMzda4iyjamcaY0nRoP472WrgMho9BW47 4LddoBncTLR6CU45hbPAZAWu8IF9EbFoRHn6Yza1PKhn4Nd4sRwmAWkTr+oY6pfG iam/hLDIxDfs77t1zCMmIP9Fz8jrNUtB8u11eQe1tb8C5LzHlfuQ27+ZQkMKmwxe pa3YFBpHQEDA6/utnmP1PdOywvU9KOF2B9Ikx5l2WZvRxEaXh1e1QOwF9guLZncs uDnV5kwm3/bcj3JYiExs =6LxY -----END PGP SIGNATURE----- _______________________________________________ Tech mailing list Tech@cryptech.is https://lists.cryptech.is/listinfo/tech
