[tpm2] Re: Schema of object.json
Anthony Arrascue <AArrascue at neuroloop.de>
| Newsgroups | dev.linux.lists.tpm2 |
|---|---|
| Message-ID | <[email protected]> |
Hi David,
Thank you for your reply. Do you know if I can find documentation about this?
I found what I believe is the serialization / deserialization of those JSON objects:
https://github.com/tpm2-software/tpm2-tss/blob/04a2853994eb31747c3e19c2601d99e675067794/src/tss2-fapi/ifapi_json_serialize.c
https://github.com/tpm2-software/tpm2-tss/blob/04a2853994eb31747c3e19c2601d99e675067794/src/tss2-fapi/ifapi_json_deserialize.c
But this encryption process of the PrivK, with the PubKey of the SRK is then somewhere else?
Best,
Anthony
From: David Challener <david.c.challener(a)gmail.com>
Sent: Tuesday, 16 November 2021 16:56
To: Anthony Arrascue <AArrascue(a)neuroloop.de>
Subject: Re: [tpm2] Schema of object.json
I expect the private key is the encrytion of the real private key with the srk oublic key.
On Tue, Nov 16, 2021, 9:31 AM Anthony Arrascue <AArrascue(a)neuroloop.de<mailto:AArrascue(a)neuroloop.de>> wrote:
Hello,
I am using TPM2-TSS v. 2.4.x and TPM2-TOOLS v. 4.X.
Let’s suppose I create a key running:
tss2_createkey --path=HS/SRK/MyKey --type="sign,noDa,decrypt,system" --authValue=blabla
This creates a folder MyKey in […]/keystore/P_RSA2048SHA256/HS/SRK/MyKey and a file object.json inside.
I was wondering what the public / private keys are?
public":{
"size":278,
"publicArea":{…},
… "unique":"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"
}
},
…
"serialization":"",
"private":"00201f93bbec6eb3d00f08cb8cafd48dffe6b06150fa45b989072922b2049c962de80010baf3c7683d5039a27cb73036531a869137bc3a57d30b8c348b73ce134eb11066e45803e5ee7bba20192ab4f6881b21004261ab06af37c68a22758284d9d21fc91d49748f6eee1bc8f1011d0e4fd228642e98f3ee65a4161d1cc53af6b0dfb48aafc9cefde1ca8212b08e16b4c15d0a16adc36b19133350f73bace6f12d11c084d9eb953cf9c87d0a2f2b34617a2369ffc9fb299113bba531d9be465e033ec54511cf6b6e3463e84018e40eaded1fa6ad13da671946cd03a567f3",
…
Questions: what is the meaning of the “unique” and “private” keys?
Is there a place where a schema can be found for a key?
The private part cannot be the private key right? It would not make sense that this is stored as plain text.
Thank you very much for any help.
Best,
Anthony Arrascue
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<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Hi David,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Thank you for your reply. Do you know if I can find documentation about this?<br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">I found what I believe is the serialization / deserialization of those JSON objects:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><a href="https://github.com/tpm2-software/tpm2-tss/blob/04a2853994eb31747c3e19c2601d99e675067794/src/tss2-fapi/ifapi_json_serialize.c">https://github.com/tpm2-software/tpm2-tss/blob/04a2853994eb31747c3e19c2601d99e675067794/src/tss2-fapi/ifapi_json_serialize.c</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><a href="https://github.com/tpm2-software/tpm2-tss/blob/04a2853994eb31747c3e19c2601d99e675067794/src/tss2-fapi/ifapi_json_deserialize.c">https://github.com/tpm2-software/tpm2-tss/blob/04a2853994eb31747c3e19c2601d99e675067794/src/tss2-fapi/ifapi_json_deserialize.c</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">But this encryption process of the PrivK, with the PubKey of the SRK is then somewhere else?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Anthony<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="en-DE" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> David Challener <[email protected]>
<br>
<b>Sent:</b> Tuesday, 16 November 2021 16:56<br>
<b>To:</b> Anthony Arrascue <[email protected]><br>
<b>Subject:</b> Re: [tpm2] Schema of object.json<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I expect the private key is the encrytion of the real private key with the srk oublic key.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Nov 16, 2021, 9:31 AM Anthony Arrascue <<a href="mailto:[email protected]">[email protected]</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="en-DE">Hello,<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="en-DE"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I am using TPM2-TSS v. 2.4.x and TPM2-TOOLS v. 4.X.</span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Let’s suppose I create a key running:</span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">tss2_createkey --path=HS/SRK/MyKey --type="sign,noDa,decrypt,system" --authValue=blabla</span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">This creates a folder MyKey in […]/keystore/P_RSA2048SHA256/HS/SRK/MyKey and a file object.json inside.</span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I was wondering what the public / private keys are?</span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:9.0pt">public":{</span></b><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:9.0pt"> "size":278,</span></b><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:9.0pt"> "publicArea":{…},</span></b><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:9.0pt"> …</span></b><b><span lang="DE" style="font-size:9.0pt"> "unique":"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"</span></b><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="DE" style="font-size:9.0pt">
</span></b><b><span lang="EN-US" style="font-size:9.0pt">}</span></b><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:9.0pt"> },</span></b><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:9.0pt">…</span></b><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:9.0pt"> "serialization":"",</span></b><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:9.0pt">"private":"00201f93bbec6eb3d00f08cb8cafd48dffe6b06150fa45b989072922b2049c962de80010baf3c7683d5039a27cb73036531a869137bc3a57d30b8c348b73ce134eb11066e45803e5ee7bba20192ab4f6881b21004261ab06af37c68a22758284d9d21fc91d49748f6eee1bc8f1011d0e4fd228642e98f3ee65a4161d1cc53af6b0dfb48aafc9cefde1ca8212b08e16b4c15d0a16adc36b19133350f73bace6f12d11c084d9eb953cf9c87d0a2f2b34617a2369ffc9fb299113bba531d9be465e033ec54511cf6b6e3463e84018e40eaded1fa6ad13da671946cd03a567f3",</span></b><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:9.0pt">…</span></b><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US">Questions</span></b><span lang="EN-US">: what is the meaning of the “unique” and “private” keys?</span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Is there a place where a schema can be found for a key?</span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">The private part cannot be the private key right? It would not make sense that this is stored as plain text.</span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Thank you very much for any help.</span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Best,</span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Anthony Arrascue</span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><span lang="en-DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><span lang="en-DE"><o:p></o:p></span></p>
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