IETF Logo Mail Archive

Re: [COSE] Help with RFC8152 encryption example

Anders Rundgren <anders.rundgren.net@gmail.com> Mon, 10 May 2021 11:59 UTC

Return-Path: <anders.rundgren.net@gmail.com>
X-Original-To: cose@ietfa.amsl.com
Delivered-To: cose@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CFC8D3A1A13 for <cose@ietfa.amsl.com>; Mon, 10 May 2021 04:59:14 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.099
X-Spam-Level:
X-Spam-Status: No, score=-2.099 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id jDcQCmOE-91r for <cose@ietfa.amsl.com>; Mon, 10 May 2021 04:59:10 -0700 (PDT)
Received: from mail-wm1-x330.google.com (mail-wm1-x330.google.com [IPv6:2a00:1450:4864:20::330]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 1E5863A1A12 for <cose@ietf.org>; Mon, 10 May 2021 04:59:09 -0700 (PDT)
Received: by mail-wm1-x330.google.com with SMTP id y124-20020a1c32820000b029010c93864955so10990692wmy.5 for <cose@ietf.org>; Mon, 10 May 2021 04:59:09 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=FX3ZBsXi5sjMeSlBaYAnkNKEnu0rDNKxRxyZ7xZpy6Y=; b=BS7z7oXIQGJkagUOGBE5lyJ3LM9j/IoK/Jro7qmRL6ANpIzHEy9S0Y4Jr2FauTJtWW DEQ0003HuonDQHklr1ppv01lvClp1YcXfOufZH9nonteiVHtgu1fuRY41muQbUa3dRnL wssxQ0PrCdzukCXyOgXv16xqaozMvIazXmqrQN3Z1t/b8hTBPPt9mkgC3HCCRn1ME/h5 8o4lHso+x5Ethw6J4esVhTwD7wlApA+rE+/i5G7XZjZgVkmWF4U3lIuVvSibWCprAAUZ W4Li8xjScQo5JmXk6LuTxckFYW02q2grs6TNLw3IhNT6mppt21aR385Kbg6lB5fbkBUK S1hw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=FX3ZBsXi5sjMeSlBaYAnkNKEnu0rDNKxRxyZ7xZpy6Y=; b=pB6BBBlTTq2cz6S6G/FSjtKMwQXdnJygOEM6fP2ew8w2XuOjvBjBJoCSmnbVESQUpI mnPqaIuebdraP8BjnJete10PkV7qz8kV5GtMjbxTsojGf0ENzAZIQbdMzDRN0UPtcc/n GEJ88PAXizl1cuexlwhuqz2hpI8fcVE8wsEg+++gMMqgDONj3kcJAU7+bKcncHao+mPL 7PZorYUNIKtImSIqSmCdOrD2ahO9vtS68xebSNzTvFMtVFnvKx3kNTVx3OQAHdbdjEXm HFG7PdeuchZxvJBE/Gy5oTJ5YNoNt68rL3bOTnIqjY7uEErNJGIeKr58GPiXFZkgkexE TWUg==
X-Gm-Message-State: AOAM531mj4S+mctBG0EUU9tdHigAcHlfStCgC/OJJrcPPoYS2YlY+i2p Dcga/Rwgs2lB1RM6d6iHdyYEfV32fHZ6Lw==
X-Google-Smtp-Source: ABdhPJxzGw3YByxrBRiHqr3drywVKtCRqSeErmYAwwwLN+BubSHwfz/TvnboNyYuAP9RvZIUdfeeOw==
X-Received: by 2002:a05:600c:1192:: with SMTP id i18mr31612363wmf.166.1620647947628; Mon, 10 May 2021 04:59:07 -0700 (PDT)
Received: from [192.168.1.67] (25.131.146.77.rev.sfr.net. [77.146.131.25]) by smtp.googlemail.com with ESMTPSA id v13sm23316543wrt.65.2021.05.10.04.59.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 10 May 2021 04:59:07 -0700 (PDT)
To: Carsten Bormann <cabo@tzi.org>
Cc: cose@ietf.org
References: <b9138e0c-a63f-bb15-11f1-b7c4519ebf2e@gmail.com> <BEEEB4E5-5FAC-4EA6-88FD-23D7B031C7AB@tzi.org>
From: Anders Rundgren <anders.rundgren.net@gmail.com>
Message-ID: <53320179-c867-d0c3-4b50-6eeb11ab5fd4@gmail.com>
Date: Mon, 10 May 2021 13:59:06 +0200
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1
MIME-Version: 1.0
In-Reply-To: <BEEEB4E5-5FAC-4EA6-88FD-23D7B031C7AB@tzi.org>
Content-Type: text/plain; charset="utf-8"; format="flowed"
Content-Language: en-US
Content-Transfer-Encoding: 8bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/cose/I9MTwwhUlegKlSXxDNs_pwmasBg>
Subject: Re: [COSE] Help with RFC8152 encryption example
X-BeenThere: cose@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: CBOR Object Signing and Encryption <cose.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/cose>, <mailto:cose-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/cose/>
List-Post: <mailto:cose@ietf.org>
List-Help: <mailto:cose-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/cose>, <mailto:cose-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 10 May 2021 11:59:15 -0000

Wunderbar!

I obviously have a few things to learn about CDDL ;)

Regards,
Anders

On 2021-05-10 12:35, Carsten Bormann wrote:
> Hi Anders,
> 
>> On 10. May 2021, at 11:24, Anders Rundgren <anders.rundgren.net@gmail.com> wrote:
>> I took this simple sample:
>> https://datatracker.ietf.org/doc/html/rfc8152#appendix-C.4.1
>>
>> and adjusted it to fit Carsten's http://cbor.me/
>>
>> 16(
>>       [
>>          {
>>              1:10
>>           } ,
>>         {
>>            5:h'89f52f65a1c580933b5261a78c'
>>         },
>>          h'5974e1b99a3a4cc09a659aa2e9e7fff161d38ce71cb45ce460ffb569'
>>       ]
>>
>> It returns 51 bytes but the RFC says 52 bytes.
> 
> The example in the RFC is (comments removed)
> 
> 16([h'A1010A', {5: h'89F52F65A1C580933B5261A78C'}, h'5974E1B99A3A4CC09A659AA2E9E7FFF161D38CE71CB45CE460FFB569’])
> 
> Or, if you enable cbor.me to show embedded CBOR [1],
> 
> 16([<< {1: 10} >>, {5: h'89F52F65A1C580933B5261A78C'}, h'5974E1B99A3A4CC09A659AA2E9E7FFF161D38CE71CB45CE460FFB569’])
> 
> http://cbor.me/?bytes=D0(83(43(A1010A)-A1(05-4D(89F52F65A1C580933B5261A78C))-58.1C(5974E1B99A3A4CC09A659AA2E9E7FFF161D38CE71CB45CE460FFB569)))
> 
> Your example however is missing the 43 byte: The map {1:10} needs to be, CBOR encoded, kept in a byte string.
> 
> Grüße, Carsten
> 
> [1]: https://datatracker.ietf.org/doc/html/rfc8610#appendix-G.3
> _______________________________________________
> COSE mailing list
> COSE@ietf.org
> https://www.ietf.org/mailman/listinfo/cose
>

v2.23.0 | Report a Bug | By Email