[tpm2] Re: OpenSSL 3 and TPM 2 vendor certs in NVRAM...

[Petr Gotthard <petr.gotthard at centrum.cz>]

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Hi James,

Loading certs from NV was also not tested and apparently doesn't work either.
https://github.com/tpm2-software/tpm2-openssl/issues/35

Please-- could you retrieve your cert from the NV and let me know whether it is DER (binary) or PEM (textual with -----BEGIN CERTIFICATE----- lines)?


Petr
______________________________________________________________
> Od: "Sievert, James" <james.sievert(a)bsci.com>
> Komu: "tpm2(a)lists.01.org" <tpm2(a)lists.01.org>
> Datum: 26.04.2022 15:18
> Předmět: [tpm2] OpenSSL 3 and TPM 2 vendor certs in NVRAM...
>
>Hi,
>
>
>The TPM vendor has internal certificates stored at 0x1c0000a and 0x1c00002:
>
>
>0x1c00002:
>
>  name: 000bec00c657a4e2724101954c2c9d51ddd45c825c3997ec0786c3afeb0f7fca3ec7
>  hash algorithm:
>    friendly: sha256
>    value: 0xB
>  attributes:
>    friendly: ppwrite|writedefine|ppread|ownerread|authread|no_da|written|platformcreate
>    value: 0x1200762
>  size: 1177
>
>0x1c0000a:
>  name: 000b2571404112c8aae1cde797c438d921093fc89b74d44564c25c296aaa26a6f041
>  hash algorithm:
>    friendly: sha256
>    value: 0xB
>  attributes:
>    friendly: ppwrite|writedefine|ppread|ownerread|authread|no_da|written|platformcreate
>    value: 0x1200762
>  size: 781
>
>I cannot retrieve them using openssl x509:
>
>$ openssl x509 -provider tpm2 -provider default -in handle:0x1c0000a
>WARNING:esys:src/tss2-esys/api/Esys_NV_Read.c:315:Esys_NV_Read_Finish() Received TPM Error
>ERROR:esys:src/tss2-esys/api/Esys_NV_Read.c:105:Esys_NV_Read() Esys Finish ErrorCode (0x00000095)
>Could not read certificate from handle:0x1c0000a
>405C04A14E7F0000:error:4000000C:tpm2::cannot load key::-1:149 tpm:handle(unk):structure is the wrong size
>Unable to load certificate
>
>$ openssl x509 -provider tpm2 -provider default -in handle:0x1c00002
>WARNING:esys:src/tss2-esys/api/Esys_NV_Read.c:315:Esys_NV_Read_Finish() Received TPM Error
>ERROR:esys:src/tss2-esys/api/Esys_NV_Read.c:105:Esys_NV_Read() Esys Finish ErrorCode (0x00000095)
>Could not read certificate from handle:0x1c00002
>40DC7060527F0000:error:4000000C:tpm2::cannot load key::-1:149 tpm:handle(unk):structure is the wrong size
>Unable to load certificate
>
>This does work; however:
>
>bsci(a)ip-10-132-42-225:~/test$ tpm2_nvread -C p -s 781 0x1c0000a |openssl x509 -in /dev/stdin -inform der -noout -text
>Certificate:
>    Data:
>        Version: 3 (0x2)
>        Serial Number: 756297432 (0x2d142ed8)
>        Signature Algorithm: ecdsa-with-SHA256
>        Issuer: C = DE, O = Infineon Technologies AG, OU = OPTIGA(TM) TPM2.0, CN = Infineon OPTIGA(TM) ECC Manufacturing CA 029
>        Validity
>            Not Before: Sep 29 02:49:58 2021 GMT
>            Not After : Sep 29 02:49:58 2036 GMT
>       ...
>
>
>Thanks.
>
>
>----------
>
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