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Jason Andryuk
64d00dd126
GetRandom passthrough currently fails when using vtpmmgr with a hardware TPM 2.0. vtpmmgr (8): INFO[VTPM]: Passthrough: TPM_GetRandom vtpm (12): vtpm_cmd.c:120: Error: TPM_GetRandom() failed with error code (30) When running on TPM 2.0 hardware, vtpmmgr needs to convert the TPM 1.2 TPM_ORD_GetRandom into a TPM2 TPM_CC_GetRandom command. Besides the differing ordinal, the TPM 1.2 uses 32bit sizes for the request and response (vs. 16bit for TPM2). Place the random output directly into the tpmcmd->resp and build the packet around it. This avoids bouncing through an extra buffer, but the header has to be written after grabbing the random bytes so we have the number of bytes to include in the size. Signed-off-by: Jason Andryuk <jandryuk@gmail.com> Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Reviewed by: Daniel P. Smith <dpsmith@apertussolutions.com>