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diff --git a/pipermail/pycrypto/2013q4/000750.html b/pipermail/pycrypto/2013q4/000750.html new file mode 100644 index 0000000..63aee7c --- /dev/null +++ b/pipermail/pycrypto/2013q4/000750.html @@ -0,0 +1,103 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<HTML> + <HEAD> + <TITLE> [pycrypto] AES, MODE_CTR + </TITLE> + <LINK REL="Index" HREF="index.html" > + <LINK REL="made" HREF="mailto:pycrypto%40lists.dlitz.net?Subject=Re%3A%20%5Bpycrypto%5D%20AES%2C%20MODE_CTR&In-Reply-To=%3CCAEncD4cEuH4VpEMGRg8%3DA%2BtCztfjBtPZpyPvREV2TddOg36TUw%40mail.gmail.com%3E"> + <META NAME="robots" CONTENT="index,nofollow"> + <style type="text/css"> + pre { + white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ + } + </style> + <META http-equiv="Content-Type" content="text/html; charset=us-ascii"> + <LINK REL="Previous" HREF="000749.html"> + + </HEAD> + <BODY BGCOLOR="#ffffff"> + <H1>[pycrypto] AES, MODE_CTR</H1> + <B>Dave Pawson</B> + <A HREF="mailto:pycrypto%40lists.dlitz.net?Subject=Re%3A%20%5Bpycrypto%5D%20AES%2C%20MODE_CTR&In-Reply-To=%3CCAEncD4cEuH4VpEMGRg8%3DA%2BtCztfjBtPZpyPvREV2TddOg36TUw%40mail.gmail.com%3E" + TITLE="[pycrypto] AES, MODE_CTR">dave.pawson at gmail.com + </A><BR> + <I>Thu Dec 5 23:24:42 PST 2013</I> + <P><UL> + <LI>Previous message: <A HREF="000749.html">[pycrypto] AES, MODE_CTR +</A></li> + + <LI> <B>Messages sorted by:</B> + <a href="date.html#750">[ date ]</a> + <a href="thread.html#750">[ thread ]</a> + <a href="subject.html#750">[ subject ]</a> + <a href="author.html#750">[ author ]</a> + </LI> + </UL> + <HR> +<!--beginarticle--> +<PRE>On 5 December 2013 19:41, Legrandin <<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">helderijs at gmail.com</A>> wrote: +>><i>Thanks Richard. Now working +</I>>><i> def test_AES5(self): +</I>>><i> pt=b' '*10 +</I>>><i> ctr=Counter.new(128) +</I>>><i> iv = Random.new().read(AES.block_size) +</I>>><i> cipher = AES.new(b' '*16, AES.MODE_CTR, IV=iv, counter=ctr) +</I>>><i> ct = cipher.encrypt(pt) +</I>>><i> ctrr=Counter.new(128) +</I>>><i> decipher = AES.new(b' '*16, AES.MODE_CTR, IV=iv, counter=ctrr) +</I>>><i> ptr = decipher.decrypt(ct) +</I>>><i> self.assertEqual(pt,ptr) +</I>>><i> iv added as suggested. +</I>><i> +</I>><i> Actually, the IV parameter is ignored in Counter mode. +</I>><i> If you want to add a nonce to the counter block you must pass it to +</I>><i> the Counter class: +</I>><i> +</I>><i> nonce = Random.new().read(8) +</I>><i> ctr = Counter.new(64, nonce) +</I>><i> cipher = AES.new(b' '*16, AES.MODE_CTR, counter=ctr) +</I>><i> +</I>><i> The counter block is then made up by 64 bits of nonce and 64 bits of counter. +</I> +Another undocumented feature? +Sigh. + + + + +><i> +</I>><i> PS: I think I get 1 out of 3 messages out of this mailing list. +</I> +Your email system or the server? +It seems that the repo owner and the mailing list are both +somewhat lax. + +regards + + +-- +Dave Pawson +XSLT XSL-FO FAQ. +Docbook FAQ. +<A HREF="http://www.dpawson.co.uk">http://www.dpawson.co.uk</A> +</PRE> + +<!--endarticle--> + <HR> + <P><UL> + <!--threads--> + <LI>Previous message: <A HREF="000749.html">[pycrypto] AES, MODE_CTR +</A></li> + + <LI> <B>Messages sorted by:</B> + <a href="date.html#750">[ date ]</a> + <a href="thread.html#750">[ thread ]</a> + <a href="subject.html#750">[ subject ]</a> + <a href="author.html#750">[ author ]</a> + </LI> + </UL> + +<hr> +<a href="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">More information about the pycrypto +mailing list</a><br> +</body></html> |