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/*
* Licensed Materials - Property of IBM
*
* trousers - An open source TCG Software Stack
*
* (C) Copyright International Business Machines Corp. 2004-2006
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <errno.h>
#include "trousers/tss.h"
#include "trousers_types.h"
#include "tcs_tsp.h"
#include "tcs_utils.h"
#include "tcs_int_literals.h"
#include "capabilities.h"
#include "tcsps.h"
#include "tcslog.h"
#include "tddl.h"
#include "req_mgr.h"
TSS_RESULT
get_current_version(TPM_VERSION *version)
{
TCPA_CAPABILITY_AREA capArea = TPM_CAP_VERSION_VAL;
UINT32 respSize;
BYTE *resp;
TSS_RESULT result;
UINT64 offset;
/* try the 1.2 way first */
result = TCSP_GetCapability_Internal(InternalContext, capArea, 0, NULL, &respSize, &resp);
if (result == TSS_SUCCESS) {
offset = sizeof(UINT16); // XXX hack
UnloadBlob_VERSION(&offset, resp, version);
free(resp);
} else if (result == TCPA_E_BAD_MODE) {
/* if the TPM doesn't understand VERSION_VAL, try the 1.1 way */
capArea = TCPA_CAP_VERSION;
result = TCSP_GetCapability_Internal(InternalContext, capArea, 0, NULL, &respSize,
&resp);
if (result == TSS_SUCCESS) {
offset = 0;
UnloadBlob_VERSION(&offset, resp, version);
free(resp);
}
}
return result;
}
TSS_RESULT
get_cap_uint32(TCPA_CAPABILITY_AREA capArea, BYTE *subCap, UINT32 subCapSize, UINT32 *v)
{
UINT32 respSize;
BYTE *resp;
TSS_RESULT result;
UINT64 offset;
result = TCSP_GetCapability_Internal(InternalContext, capArea, subCapSize, subCap,
&respSize, &resp);
if (!result) {
offset = 0;
switch (respSize) {
case 1:
UnloadBlob_BYTE(&offset, (BYTE *)v, resp);
break;
case sizeof(UINT16):
UnloadBlob_UINT16(&offset, (UINT16 *)v, resp);
break;
case sizeof(UINT32):
UnloadBlob_UINT32(&offset, v, resp);
break;
default:
LogDebug("TCSP_GetCapability_Internal returned"
" %u bytes", respSize);
result = TCSERR(TSS_E_FAIL);
break;
}
free(resp);
}
return result;
}
TSS_RESULT
get_max_auths(UINT32 *auths)
{
TCS_AUTHHANDLE handles[TSS_MAX_AUTHS_CAP];
TCPA_NONCE nonce;
UINT32 subCap;
TSS_RESULT result;
int i;
if (TPM_VERSION_IS(1,2)) {
UINT32ToArray(TPM_CAP_PROP_MAX_AUTHSESS, (BYTE *)(&subCap));
result = get_cap_uint32(TPM_CAP_PROPERTY, (BYTE *)&subCap, sizeof(subCap), auths);
} else if (TPM_VERSION_IS(1,1)) {
/* open auth sessions until we get a failure */
for (i = 0; i < TSS_MAX_AUTHS_CAP; i++) {
result = TCSP_OIAP_Internal(InternalContext, &(handles[i]), &nonce);
if (result != TSS_SUCCESS) {
/* this is not off by one since we're 0 indexed */
*auths = i;
break;
}
}
if (i == TSS_MAX_AUTHS_CAP)
*auths = TSS_MAX_AUTHS_CAP;
/* close the auth sessions */
for (i = 0; (UINT32)i < *auths; i++) {
internal_TerminateHandle(handles[i]);
}
} else {
result = TCSERR(TSS_E_INTERNAL_ERROR);
*auths = 0;
}
if (*auths < 2) {
LogError("%s reported only %u auth available!", __FUNCTION__, *auths);
LogError("Your TPM must be reset before the TCSD can be started.");
} else {
LogDebug("get_max_auths reports %u auth contexts found", *auths);
result = TSS_SUCCESS;
}
return result;
}
/* This is only called from init paths, so printing an error message is
* appropriate if something goes wrong */
TSS_RESULT
get_tpm_metrics(struct tpm_properties *p)
{
TSS_RESULT result;
UINT32 subCap, rv = 0;
if ((result = get_current_version(&p->version)))
goto err;
UINT32ToArray(TPM_ORD_SaveKeyContext, (BYTE *)&subCap);
if ((result = get_cap_uint32(TCPA_CAP_ORD, (BYTE *)&subCap, sizeof(UINT32), &rv)))
goto err;
p->keyctx_swap = rv ? TRUE : FALSE;
rv = 0;
UINT32ToArray(TPM_ORD_SaveAuthContext, (BYTE *)&subCap);
if ((result = get_cap_uint32(TCPA_CAP_ORD, (BYTE *)&subCap, sizeof(UINT32), &rv)))
goto err;
p->authctx_swap = rv ? TRUE : FALSE;
UINT32ToArray(TPM_CAP_PROP_PCR, (BYTE *)&subCap);
if ((result = get_cap_uint32(TCPA_CAP_PROPERTY, (BYTE *)&subCap, sizeof(UINT32),
&p->num_pcrs)))
goto err;
UINT32ToArray(TPM_CAP_PROP_DIR, (BYTE *)&subCap);
if ((result = get_cap_uint32(TCPA_CAP_PROPERTY, (BYTE *)&subCap, sizeof(UINT32),
&p->num_dirs)))
goto err;
UINT32ToArray(TPM_CAP_PROP_SLOTS, (BYTE *)&subCap);
if ((result = get_cap_uint32(TCPA_CAP_PROPERTY, (BYTE *)&subCap, sizeof(UINT32),
&p->num_keys)))
goto err;
UINT32ToArray(TPM_CAP_PROP_MANUFACTURER, (BYTE *)&subCap);
if ((result = get_cap_uint32(TCPA_CAP_PROPERTY, (BYTE *)&subCap, sizeof(UINT32),
(UINT32 *)&p->manufacturer)))
goto err;
result = get_max_auths(&(p->num_auths));
err:
if (result)
LogError("TCS GetCapability failed with result = 0x%x", result);
return result;
}
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