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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <stdio.h>
#include <unistd.h>
#include "alloc-util.h"
#include "analyze-srk.h"
#include "fileio.h"
#include "log.h"
#include "terminal-util.h"
#include "tpm2-util.h"
int verb_srk(int argc, char *argv[], void *userdata) {
#if HAVE_TPM2
_cleanup_(tpm2_context_unrefp) Tpm2Context *c = NULL;
_cleanup_(Esys_Freep) TPM2B_PUBLIC *public = NULL;
int r;
r = tpm2_context_new_or_warn(/* device= */ NULL, &c);
if (r < 0)
return r;
r = tpm2_get_srk(
c,
/* session= */ NULL,
&public,
/* ret_name= */ NULL,
/* ret_qname= */ NULL,
/* ret_handle= */ NULL);
if (r < 0)
return log_error_errno(r, "Failed to get SRK: %m");
if (r == 0)
return log_error_errno(SYNTHETIC_ERRNO(ENOENT), "No SRK stored so far.");
_cleanup_free_ void *marshalled = NULL;
size_t marshalled_size = 0;
r = tpm2_marshal_public(public, &marshalled, &marshalled_size);
if (r < 0)
return log_error_errno(r, "Failed to marshal SRK: %m");
if (isatty_safe(STDOUT_FILENO))
return log_error_errno(SYNTHETIC_ERRNO(EIO),
"Refusing to write binary data to TTY, please redirect output to file.");
if (fwrite(marshalled, 1, marshalled_size, stdout) != marshalled_size)
return log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to write SRK to stdout.");
r = fflush_and_check(stdout);
if (r < 0)
return log_error_errno(r, "Failed to write SRK to stdout: %m");
return EXIT_SUCCESS;
#else
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "TPM2 support not available.");
#endif
}
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