[tpm2] CMP error: cannot duplicate context:2306 tpm:warn(2.0): out of memory for object contexts

[tpm2] CMP error: cannot duplicate context:2306 tpm:warn(2.0): out of memory for object contexts

[Chris Newman]

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Hi,

I create an EK and AK using tpm2_createek, tpm2_createak and 
tpm2_evictcontrol to persist the AK in 0x81010002. The I use the 
following command with DigiCert's CMPv2 server:

openssl cmp -config /opt/sdk/openssl/current/ssl/openssl.cnf -provider 
tpm2 -provider default -propquery ?provider=tpm2,tpm2.digest!=yes -cmd 
ir -server https://demo.one.digicert.com/iot/api/v1/cmp/IOT_1234 -ref 
1234 -secret pass:1234 -recipient "/CN=mode51.software" -key 
handle:0x81010002 -subject "/CN=TestTest" -cacertsout ./capubs.pem 
-certout ./cl_cert.pem -tls_used -verbosity 8

I get the following error:

DIGEST NEW
DIGEST INIT
DIGEST UPDATE
DIGEST DUP
DIGEST FINAL
DIGEST FREE
DIGEST NEW
DIGEST INIT
DIGEST UPDATE
DIGEST NEW
DIGEST INIT
DIGEST UPDATE
DIGEST DUP
WARNING:esys:src/tss2-esys/api/Esys_ContextLoad.c:279:Esys_ContextLoad_Finish() 
Received TPM Error
ERROR:esys:src/tss2-esys/api/Esys_ContextLoad.c:93:Esys_ContextLoad() 
Esys Finish ErrorCode (0x00000902)
DIGEST FREE
DIGEST FREE
DIGEST FREE
CMP DEBUG: disconnected from CMP server
*CMP error: cannot duplicate context:2306 tpm:warn(2.0): out of memory 
for object contexts*
CMP error: not able to copy ctx
CMP error: internal error
CMP error: error sending
CMP error: shutdown while in init
CMP error: transfer error:request sent: IR, expected response: IP
RSA FREE
RAND FREE
RAND FREE
RAND FREE
PROVIDER TEARDOWN


I've tried tpm2_flushcontext -t.

I recompiled tpm2-openssl with the following option and that appears to 
have worked around the issue:

--disable-op-digest

Is this what "?provider=tpm2,tpm2.digest!=yes" should effectively do?


-- 

Chris Newman
https://mode51.software <https://mode51.software>
@mode51software <https://twitter.com/mode51software>




mode51 Software Ltd is registered in England and Wales
Company Number 13007792 Registered Office 3 Orchard Way, CB24 1AG, UK

GPG Encryption key 
<https://mode51.software/downloads/chrisnewman-mode51-pub-20201111.asc>

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