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.TH "tpm_restrictsrk" 8 "2019-01-27"  "TPM Management"
.ce 1
TPM Management - tpm_restrictsrk
.SH NAME
tpm_restrictsrk \- restrict the ability to access the Storage Root Key
.SH "SYNOPSIS"
.ad l
.hy 0
.B tpm_restrictsrk
.RB [ OPTION ]

.SH "DESCRIPTION"
.PP
\fBtpm_restrictsrk\fR reports the status of who can access the Storage Root Key.  This is the default behavior and also available with the \fB\-\-status\fR option.
This operation will be in effect until the owner is cleared and prompts for the owner passord.  With the \fB\-\-restrict\fR option, the ability to access the Storage Root Key is resticted to the owner.
The command prompts for the owner password to complete the operation.  The \fB\-\-allow\fR and \fB\-\-restrict\fR options are mutually exclusive and the last one on the command line will be carried out.

.TP
\fB\-h\fR, \fB\-\-help\fR
Display command usage info.
.TP
\fB-v\fR, \fB\-\-version\fR
Display command version info.
.TP
\fB-l\fR, \fB\-\-log\fR [none|error|info|debug]
Set logging level.
.TP
\fB-u\fR, \fB\-\-unicode\fR
Use TSS UNICODE encoding for passwords to comply with applications using TSS popup boxes
.TP
\fB-a\fR, \fB\-\-allow\fR
Allow SRK read access using SRK auth
.TP
\fB-s\fR, \fB\-\-status\fR
Display the status of who can access the Storage Root Key
.TP
\fB-r\fR, \fB\-\-restrict\fR
Restrict SRK read to owner only
.TP
\fB-z\fR, \fB\-\-well-known\fR
Authenticate using 20 bytes of zeros as owner password (the default TSS Well Known Secret), instead of prompting for an owner password.

.SH "SEE ALSO"
.PP
\fBtpm_version\fR(1), \fBtpm_takeownership\fR(8), \fBtcsd\fR(8)

.SH "REPORTING BUGS"
Report bugs to <trousers-users@lists.sourceforge.net>