unbindfile.1

IBM开发的TPM的驱动, 有少量的例子可以供参考

.\" Copyright 2004 IBM (Jeff Kravitz)
.\"
.\" Written Mar 11 2004, Jeff Kravitz
.\"
.TH unbindfile 1  2004-04-14 "IBM" "TPM Utilities"
.SH NAME
unbindfile \- decrypts a data file
.SH SYNOPSIS

unbindfile [<options>] <key handle> <input file> <outputfile>

.SH DESCRIPTION
This command will decrypt a file encrypted by the \fBbindfile\fP utility.
.SH ARGUMENTS
.TP 5
key handle
is an 8-hex-digit number that specifies the TPM handle assigned to the
key that is to be used for decrypting.
It is
usually obtained from the \fBloadkey\fP utility
when the key was loaded into the TPM.
.TP 5
input file
is the name of the file containing the encrypted data.
.TP 5
output file
This specifies the name of the output file, which contains the decrypted data.
.SH OPTIONS
The following command line options are supported...
.TP 5                
-k <keypass>
specifies the key usage password,
which is any character string, up to 256 bytes long.
It specifies the password needed to use the key that decrypts the file.
The actual "Authorization Data"
passed to the TPM is the 20 byte SHA1 hash of the user-specified password.
.SH "SEE ALSO"
loadkey(1), bindfile(1)
.SH AUTHOR
Jeff Kravitz , IBM T. J. Watson Research Center