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Re: [TLS] About TLS 1.2 AEAD ciphers definition

Michael Gray <mickgray@au1.ibm.com> Thu, 27 May 2010 21:04 UTC

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To: Juho Vähä-Herttua <juhovh@iki.fi>
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From: Michael Gray <mickgray@au1.ibm.com>
Date: Fri, 28 May 2010 07:04:32 +1000
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Cc: Adam Langley <agl@imperialviolet.org>, tls@ietf.org
Subject: Re: [TLS] About TLS 1.2 AEAD ciphers definition
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Juho Vähä-Herttua wrote on 28/05/2010 02:42:18 AM:

>
> The only currently defined AEAD ciphers seem to be AES_128_GCM and
> AES_256_GCM defined by RFC 5288. I'm a bit surprised that AES
> encryption doesn't introduce padding though, it might be just me
> misunderstanding the GCM process but I thought it still needs to pad
> the input data to match the block size, doesn't it? The TLSv1
> explicit padding of CBC ciphers is not present in the AEAD ciphers
> at all. RFC 5288 doesn't define any kind of padding either, which
> makes me wonder how it is actually implemented...

RFC 5289 Defines additional ECC GCM Cipher Suites

Mick

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