NAME

       tpmUnsealFile, tpmUnsealShred, tpmUnsealStrerror - unseal routines

SYNOPSIS

       #include <tpm_unseal/tpm_unseal.h>

       int tpmUnsealFile(char* file, char** data, int* size);
       void tpmUnsealShred(char* data, int size);
       char* tpmUnsealStrerror(int rc);

DESCRIPTION

       The functions in the tpmUnseal family allow access to a piece of sensitive data that has
       been sealed to the TPM configuration of a given system if the conditions are right, that
       is the SRK has not changed and the PCRS (if any) specified at seal time are of the
       appropriate value.

       The tpmUnsealFile function returns the contents of the file unsealed in the data buffer.
       The memory at *data must be freed by the caller.

       The tpmUnsealShred function will zero and free the memory.

       The tpmUnsealStrerror function will convert the return code from tpmUnsealFile into a
       human comprehensible string using and internal errno variable.

Return Value

       The tpmUnsealFile function returns 0 on success and a negative number on error.  The
       tpmUnsealStrerror function returns the error string on success and the empty string on an
       error.

SEE ALSO

       tpm_sealdata(1)

REPORTING BUGS

       Report bugs to <trousers-users@lists.sourceforge.net>