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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">And your values match Axel’s and Brian’s?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> -- Mike<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Edmund Jay [mailto:ejay@mgi1.com]
<br>
<b>Sent:</b> Monday, August 12, 2013 10:49 AM<br>
<b>To:</b> Mike Jones; Axel.Nennker@telekom.de; bcampbell@pingidentity.com<br>
<b>Cc:</b> openid-specs-ab@lists.openid.net<br>
<b>Subject:</b> Re: [Openid-specs-ab] ECDH+KDF example (was Re: Spec Call note 5-Aug-2013)<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">Hi Mike,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">I used OpenSSL for the ECDH part and my own KDF.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">-- Edmund<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">From:</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> Mike Jones <<a href="mailto:Michael.Jones@microsoft.com">Michael.Jones@microsoft.com</a>><br>
<b>To:</b> "<a href="mailto:Axel.Nennker@telekom.de">Axel.Nennker@telekom.de</a>" <<a href="mailto:Axel.Nennker@telekom.de">Axel.Nennker@telekom.de</a>>; "<a href="mailto:bcampbell@pingidentity.com">bcampbell@pingidentity.com</a>" <<a href="mailto:bcampbell@pingidentity.com">bcampbell@pingidentity.com</a>>
<br>
<b>Cc:</b> "<a href="mailto:openid-specs-ab@lists.openid.net">openid-specs-ab@lists.openid.net</a>" <<a href="mailto:openid-specs-ab@lists.openid.net">openid-specs-ab@lists.openid.net</a>>; "<a href="mailto:ejay@mgi1.com">ejay@mgi1.com</a>" <<a href="mailto:ejay@mgi1.com">ejay@mgi1.com</a>>
<br>
<b>Sent:</b> Monday, August 12, 2013 8:59 AM<br>
<b>Subject:</b> RE: [Openid-specs-ab] ECDH+KDF example (was Re: Spec Call note 5-Aug-2013)</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="color:black"><br>
Thanks guys. What libraries are all of you using? Axel - are you using just Java or BouncyCastle? Brian? Edmund? I'd like to verify that there are implementations with two different libraries getting the same results.<br>
<br>
Thanks,<br>
-- Mike<br>
<br>
-----Original Message-----<br>
From: <a href="mailto:Axel.Nennker@telekom.de">Axel.Nennker@telekom.de</a> [mailto:<a href="mailto:Axel.Nennker@telekom.de">Axel.Nennker@telekom.de</a>]
<br>
Sent: Monday, August 12, 2013 7:11 AM<br>
To: <a href="mailto:bcampbell@pingidentity.com">bcampbell@pingidentity.com</a>; Mike Jones<br>
Cc: <a href="mailto:openid-specs-ab@lists.openid.net">openid-specs-ab@lists.openid.net</a>;
<a href="mailto:ejay@mgi1.com">ejay@mgi1.com</a><br>
Subject: RE: [Openid-specs-ab] ECDH+KDF example (was Re: Spec Call note 5-Aug-2013)<br>
<br>
I get the same data in my Java implementation.<br>
<br>
ECDH-ED KeyAgreement: agreed key=nlbZHYFxNdNyg0KDv4QmnPsxbqPagGpI9tqneYz-kMQ<br>
ECDH-ED KeyAgreement: otherInfo=QTEyOEdDTQAAAAVBbGljZQAAAANCb2IAAACA<br>
ECDH-ED KeyAgreement: key=usEpwFIC_qrmBExntFwxMA<br>
<br>
Axel<br>
<br>
-----Original Message-----<br>
From: <a href="mailto:openid-specs-ab-bounces@lists.openid.net">openid-specs-ab-bounces@lists.openid.net</a> [mailto:<a href="mailto:openid-specs-ab-bounces@lists.openid.net">openid-specs-ab-bounces@lists.openid.net</a>] On Behalf Of Brian Campbell<br>
Sent: Sunday, August 11, 2013 4:23 PM<br>
To: Mike Jones<br>
Cc: <a href="mailto:openid-specs-ab@lists.openid.net">openid-specs-ab@lists.openid.net</a> List; Edmund Jay<br>
Subject: Re: [Openid-specs-ab] ECDH+KDF example (was Re: Spec Call note 5-Aug-2013)<br>
<br>
Ugh... sorry, I had a mistake in one of the debug outputs in that example. I was printing out the other info bytes where it should have been the counter.<br>
<br>
It was just a mistake in what was being passed to a debug statement.<br>
The actual calculation isn't changed/<br>
<br>
So,<br>
<br>
[ConcatKeyDerivationFunction] counter: [65, 49, 50, 56, 71, 67, 77, 0, 0, 0, 5, 65, 108, 105, 99, 101, 0, 0, 0, 3, 66, 111, 98, 0, 0, 0,<br>
128](27bytes/216bits) | base64url encoded:<br>
QTEyOEdDTQAAAAVBbGljZQAAAANCb2<br>
IAAACA<br>
<br>
should have been:<br>
<br>
[ConcatKeyDerivationFunction] counter: [0, 0, 0, 1](4bytes/32bits) | base64url encoded: AAAAAQ<br>
<br>
<br>
So the, hopefully now correct, complete output is (also attached at text file):<br>
<br>
[ECDH w/ JWA -14 KDF example] Receiver JWK:<br>
{"kty":"EC",<br>
"crv":"P-256",<br>
"x":"weNJy2HscCSM6AEDTDg04biOvhFhyyWvOHQfeF_PxMQ",<br>
"y":"e8lnCO-AlStT-NJVX-crhB7QRYhiix03illJOVAOyck",<br>
"d":"VEmDZpDXXK8p8N0Cndsxs924q6nS1RXFASRl6BfUqdw"<br>
}<br>
[ECDH w/ JWA -14 KDF example] Ephemeral JWK:<br>
{"kty":"EC",<br>
"crv":"P-256",<br>
"x":"weNJy2HscCSM6AEDTDg04biOvhFhyyWvOHQfeF_PxMQ",<br>
"y":"e8lnCO-AlStT-NJVX-crhB7QRYhiix03illJOVAOyck",<br>
"d":"VEmDZpDXXK8p8N0Cndsxs924q6nS1RXFASRl6BfUqdw"<br>
}<br>
[ECDH w/ JWA -14 KDF example] Output of sender's ECDH (z): [158, 86, 217, 29, 129, 113, 53, 211, 114, 131, 66, 131, 191, 132, 38, 156, 251, 49, 110, 163, 218, 128, 106, 72, 246, 218, 167, 121, 140, 254, 144,<br>
196](32bytes/256bits) | base64url encoded:<br>
nlbZHYFxNdNyg0KDv4QmnPsxbqPagGpI9tqneYz-kMQ<br>
[ECDH w/ JWA -14 KDF example] Output of receiver ECDH (z): [158, 86, 217, 29, 129, 113, 53, 211, 114, 131, 66, 131, 191, 132, 38, 156, 251, 49, 110, 163, 218, 128, 106, 72, 246, 218, 167, 121, 140, 254, 144,<br>
196](32bytes/256bits) | base64url encoded:<br>
nlbZHYFxNdNyg0KDv4QmnPsxbqPagGpI9tqneYz-kMQ<br>
[ECDH w/ JWA -14 KDF example] keydatalen: 128 [ECDH w/ JWA -14 KDF example] algorithmId: A128GCM [ECDH w/ JWA -14 KDF example] apu: QWxpY2U | decoded: Alice [ECDH w/ JWA -14 KDF example] apv: Qm9i | decoded: Bob [ConcatKeyDerivationFunction] Hash Algorithm:
SHA-256 with hashlen: 256 bits [ConcatKeyDerivationFunction] KDF:<br>
[ConcatKeyDerivationFunction] z: [158, 86, 217, 29, 129, 113, 53,<br>
211, 114, 131, 66, 131, 191, 132, 38, 156, 251, 49, 110, 163, 218, 128, 106, 72, 246, 218, 167, 121, 140, 254, 144, 196](32bytes/256bits)<br>
| base64url encoded: nlbZHYFxNdNyg0KDv4QmnPsxbqPagGpI9tqneYz-kMQ<br>
[ConcatKeyDerivationFunction] keydatalen: 128<br>
[ConcatKeyDerivationFunction] algorithmId: [65, 49, 50, 56, 71, 67,<br>
77](7bytes/56bits) | base64url encoded: QTEyOEdDTQ<br>
[ConcatKeyDerivationFunction] partyUInfo: [0, 0, 0, 5, 65, 108, 105,<br>
99, 101](9bytes/72bits) | base64url encoded: AAAABUFsaWNl<br>
[ConcatKeyDerivationFunction] suppPubInfo: [0, 0, 0,<br>
128](4bytes/32bits) | base64url encoded: AAAAgA<br>
[ConcatKeyDerivationFunction] suppPrivInfo: [](0bytes/0bits) |<br>
base64url encoded:<br>
[ConcatKeyDerivationFunction] reps: 1<br>
[ConcatKeyDerivationFunction] otherInfo: [65, 49, 50, 56, 71, 67, 77, 0, 0, 0, 5, 65, 108, 105, 99, 101, 0, 0, 0, 3, 66, 111, 98, 0, 0, 0,<br>
128](27bytes/216bits) | base64url encoded:<br>
QTEyOEdDTQAAAAVBbGljZQAAAANCb2IAAACA<br>
[ConcatKeyDerivationFunction] rep 1 hashing [ConcatKeyDerivationFunction] counter: [0, 0, 0, 1](4bytes/32bits) | base64url encoded: AAAAAQ [ConcatKeyDerivationFunction] z: [158, 86, 217, 29, 129, 113, 53, 211, 114, 131, 66, 131, 191, 132, 38, 156, 251, 49,
110, 163, 218, 128, 106, 72, 246, 218, 167, 121, 140, 254, 144, 196](32bytes/256bits)<br>
| base64url encoded: nlbZHYFxNdNyg0KDv4QmnPsxbqPagGpI9tqneYz-kMQ<br>
[ConcatKeyDerivationFunction] otherInfo: [65, 49, 50, 56, 71, 67, 77, 0, 0, 0, 5, 65, 108, 105, 99, 101, 0, 0, 0, 3, 66, 111, 98, 0, 0, 0,<br>
128](27bytes/216bits) | base64url encoded:<br>
QTEyOEdDTQAAAAVBbGljZQAAAANCb2IAAACA<br>
[ConcatKeyDerivationFunction] k(1): [186, 193, 41, 192, 82, 2, 254, 170, 230, 4, 76, 103, 180, 92, 49, 48, 92, 55, 131, 15, 80, 148, 215, 60, 65, 196, 187, 233, 163, 142, 6, 218](32bytes/256bits) | base64url<br>
encoded: usEpwFIC_qrmBExntFwxMFw3gw9QlNc8QcS76aOOBto<br>
[ConcatKeyDerivationFunction] derived key material: [186, 193, 41, 192, 82, 2, 254, 170, 230, 4, 76, 103, 180, 92, 49, 48, 92, 55, 131, 15, 80, 148, 215, 60, 65, 196, 187, 233, 163, 142, 6,<br>
218](32bytes/256bits) | base64url encoded:<br>
usEpwFIC_qrmBExntFwxMFw3gw9QlNc8QcS76aOOBto<br>
[ConcatKeyDerivationFunction] first 128 bits of derived key material:<br>
[186, 193, 41, 192, 82, 2, 254, 170, 230, 4, 76, 103, 180, 92, 49,<br>
48](16bytes/128bits) | base64url encoded: usEpwFIC_qrmBExntFwxMA [ConcatKeyDerivationFunction] final derived key material: [186, 193, 41, 192, 82, 2, 254, 170, 230, 4, 76, 103, 180, 92, 49,<br>
48](16bytes/128bits) | base64url encoded: usEpwFIC_qrmBExntFwxMA [ECDH w/ JWA -14 KDF example] Derived Key from KDF:[186, 193, 41, 192, 82, 2, 254, 170, 230, 4, 76, 103, 180, 92, 49, 48](16bytes/128bits) | base64url encoded: usEpwFIC_qrmBExntFwxMA<br>
<br>
<br>
<o:p></o:p></span></p>
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