/*
* Copyright (C) 2018 Tobias Brunner
* Copyright (C) 2016-2020 Andreas Steffen
* HSR Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "tpm_tss_tss2.h"
#include "tpm_tss_tss2_names.h"
#ifdef TSS_TSS2_V1
#include <asn1/asn1.h>
#include <asn1/oid.h>
#include <bio/bio_reader.h>
#include <bio/bio_writer.h>
#include <threading/mutex.h>
#include <tpm20.h>
#include <unistd.h>
#ifdef TSS2_TCTI_TABRMD
#include <tcti/tcti-tabrmd.h>
#endif /* TSS2_TCTI_TABRMD */
#ifdef TSS2_TCTI_SOCKET
#include <tcti_socket.h>
#define TCTI_SOCKET_DEFAULT_ADDRESS "127.0.0.1"
#define TCTI_SOCKET_DEFAULT_PORT 2323
#endif /* TSS2_TCTI_SOCKET */
#define LABEL "TPM 2.0 -"
#define PLATFORM_PCR 24
#define MAX_PCR_BANKS 4
typedef struct private_tpm_tss_tss2_t private_tpm_tss_tss2_t;
/**
* Private data of an tpm_tss_tss2_t object.
*/
struct private_tpm_tss_tss2_t {
/**
* Public tpm_tss_tss2_t interface.
*/
tpm_tss_t public;
/**
* TCTI context
*/
TSS2_TCTI_CONTEXT *tcti_context;
/**
* SYS context
*/
TSS2_SYS_CONTEXT *sys_context;
/**
* TPM version info
*/
chunk_t version_info;
/**
* Number of supported algorithms
*/
size_t supported_algs_count;
/**
* List of supported algorithms
*/
TPM_ALG_ID supported_algs[TPM_PT_ALGORITHM_SET];
/**
* Number of assigned PCR banks
*/
size_t assigned_pcrs_count;
/**
* List of assigned PCR banks
*/
TPM_ALG_ID assigned_pcrs[MAX_PCR_BANKS];
/**
* Is TPM FIPS 186-4 compliant ?
*/
bool fips_186_4;
/**
* Mutex controlling access to the TPM 2.0 context
*/
mutex_t *mutex;
};
/**
* Some symbols required by libtctisocket
*/
FILE *outFp;
uint8_t simulator = 1;
int TpmClientPrintf (uint8_t type, const char *format, ...)
{
return 0;
}
/**
* Convert hash algorithm to TPM_ALG_ID
*/
static TPM_ALG_ID hash_alg_to_tpm_alg_id(hash_algorithm_t alg)
{
switch (alg)
{
case HASH_SHA1:
return TPM_ALG_SHA1;
case HASH_SHA256:
return TPM_ALG_SHA256;
case HASH_SHA384:
return TPM_ALG_SHA384;
case HASH_SHA512:
return TPM_ALG_SHA512;
default:
return TPM_ALG_ERROR;
}
}
/**
* Convert TPM_ALG_ID to hash algorithm
*/
static hash_algorithm_t hash_alg_from_tpm_alg_id(TPM_ALG_ID alg)
{
switch (alg)
{
case TPM_ALG_SHA1:
return HASH_SHA1;
case TPM_ALG_SHA256:
return HASH_SHA256;
case TPM_ALG_SHA384:
return HASH_SHA384;
case TPM_ALG_SHA512:
return HASH_SHA512;
default:
return HASH_UNKNOWN;
}
}
/**
* Check if an algorithm given by its TPM_ALG_ID is supported by the TPM
*/
static bool is_supported_alg(private_tpm_tss_tss2_t *this, TPM_ALG_ID alg_id)
{
int i;
if (alg_id == TPM_ALG_ERROR)
{
return FALSE;
}
for (i = 0; i < this->supported_algs_count; i++)
{
if (this->supported_algs[i] == alg_id)
{
return TRUE;
}
}
return FALSE;
}
/**
* Get the TPM version_info and a list of supported algorithms
*
* 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
*
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | TPM 2.0 Version_Info Tag | Reserved | Locality |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Revision |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Year |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Vendor |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
#define TPM2_VERSION_INFO_TAG 0x0200
#define TPM2_VERSION_INFO_RESERVED 0x00
#define TPM2_VERSION_INFO_SIZE 16
#define TPM2_DEFAULT_LOCALITY 3
static bool get_algs_capability(private_tpm_tss_tss2_t *this)
{
TPMS_CAPABILITY_DATA cap_data;
TPMS_TAGGED_PROPERTY tp;
TPMI_YES_NO more_data;
TPM_ALG_ID alg;
bio_writer_t *writer;
bool fips_140_2 = FALSE;
uint32_t rval, i, offset, revision = 0, year = 0, vendor = 0;
uint8_t locality = TPM2_DEFAULT_LOCALITY;
size_t len = BUF_LEN;
char buf[BUF_LEN], manufacturer[5], vendor_string[17];
char *pos = buf;
int written;
/* get fixed properties */
this->mutex->lock(this->mutex);
rval = Tss2_Sys_GetCapability(this->sys_context, 0, TPM_CAP_TPM_PROPERTIES,
PT_FIXED, MAX_TPM_PROPERTIES, &more_data, &cap_data, 0);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS, "%s GetCapability failed for TPM_CAP_TPM_PROPERTIES: 0x%06x",
LABEL, rval);
return FALSE;
}
memset(manufacturer, '\0', sizeof(manufacturer));
memset(vendor_string, '\0', sizeof(vendor_string));
/* print fixed properties */
for (i = 0; i < cap_data.data.tpmProperties.count; i++)
{
tp = cap_data.data.tpmProperties.tpmProperty[i];
switch (tp.property)
{
case TPM_PT_REVISION:
revision = tp.value;
break;
case TPM_PT_YEAR:
year = tp.value;
break;
case TPM_PT_MANUFACTURER:
vendor = tp.value;
htoun32(manufacturer, tp.value);
break;
case TPM_PT_VENDOR_STRING_1:
case TPM_PT_VENDOR_STRING_2:
case TPM_PT_VENDOR_STRING_3:
case TPM_PT_VENDOR_STRING_4:
offset = 4 * (tp.property - TPM_PT_VENDOR_STRING_1);
htoun32(vendor_string + offset, tp.value);
break;
case TPM_PT_MODES:
if (tp.value & TPMA_MODES_FIPS_140_2)
{
this->fips_186_4 = fips_140_2 = TRUE;
}
break;
default:
break;
}
}
if (!fips_140_2)
{
this->fips_186_4 = lib->settings->get_bool(lib->settings,
"%s.plugins.tpm.fips_186_4", FALSE, lib->ns);
}
DBG2(DBG_PTS, "%s manufacturer: %s (%s) rev: %05.2f %u %s", LABEL,
manufacturer, vendor_string, (float)revision/100, year,
fips_140_2 ? "FIPS 140-2" : (this->fips_186_4 ? "FIPS 186-4" : ""));
/* determine if TPM uses old event digest format and a different locality */
if (streq(manufacturer, "INTC") && revision == 116 && year == 2016)
{
locality = 0;
}
/* construct TPM 2.0 version_info object */
writer = bio_writer_create( TPM2_VERSION_INFO_SIZE);
writer->write_uint16(writer, TPM2_VERSION_INFO_TAG);
writer->write_uint8(writer, TPM2_VERSION_INFO_RESERVED);
writer->write_uint8(writer, locality);
writer->write_uint32(writer, revision);
writer->write_uint32(writer, year);
writer->write_uint32(writer, vendor);
this->version_info = writer->extract_buf(writer);
writer->destroy(writer);
/* get supported algorithms */
this->mutex->lock(this->mutex);
rval = Tss2_Sys_GetCapability(this->sys_context, 0, TPM_CAP_ALGS,
0, TPM_PT_ALGORITHM_SET, &more_data, &cap_data, 0);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS, "%s GetCapability failed for TPM_CAP_ALGS: 0x%06x",
LABEL, rval);
return FALSE;
}
/* Number of supported algorithms */
this->supported_algs_count = cap_data.data.algorithms.count;
/* store and print supported algorithms */
for (i = 0; i < this->supported_algs_count; i++)
{
alg = cap_data.data.algorithms.algProperties[i].alg;
this->supported_algs[i] = alg;
written = snprintf(pos, len, " %N", tpm_alg_id_names, alg);
if (written < 0 || written >= len)
{
break;
}
pos += written;
len -= written;
}
DBG2(DBG_PTS, "%s algorithms:%s", LABEL, buf);
/* get supported ECC curves */
this->mutex->lock(this->mutex);
rval = Tss2_Sys_GetCapability(this->sys_context, 0, TPM_CAP_ECC_CURVES,
0, TPM_PT_LOADED_CURVES, &more_data, &cap_data, 0);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS, "%s GetCapability failed for TPM_CAP_ECC_CURVES: 0x%06x",
LABEL, rval);
return FALSE;
}
/* reset print buffer */
pos = buf;
len = BUF_LEN;
/* print supported ECC curves */
for (i = 0; i < cap_data.data.eccCurves.count; i++)
{
written = snprintf(pos, len, " %N", tpm_ecc_curve_names,
cap_data.data.eccCurves.eccCurves[i]);
if (written < 0 || written >= len)
{
break;
}
pos += written;
len -= written;
}
DBG2(DBG_PTS, "%s ECC curves:%s", LABEL, buf);
/* get assigned PCR banks */
this->mutex->lock(this->mutex);
rval = Tss2_Sys_GetCapability(this->sys_context, 0, TPM_CAP_PCRS,
0, MAX_PCR_BANKS, &more_data, &cap_data, 0);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS, "%s GetCapability failed for TPM_CAP_PCRS: 0x%06x",
LABEL, rval);
return FALSE;
}
/* Number of assigned PCR banks */
this->assigned_pcrs_count = cap_data.data.assignedPCR.count;
/* reset print buffer */
pos = buf;
len = BUF_LEN;
/* store and print assigned PCR banks */
for (i = 0; i < cap_data.data.assignedPCR.count; i++)
{
alg = cap_data.data.assignedPCR.pcrSelections[i].hash;
this->assigned_pcrs[i] = alg;
written = snprintf(pos, len, " %N", tpm_alg_id_names, alg);
if (written < 0 || written >= len)
{
break;
}
pos += written;
len -= written;
}
DBG2(DBG_PTS, "%s PCR banks:%s", LABEL, buf);
return TRUE;
}
/**
* Initialize TSS2 TCTI TABRMD context
*/
static bool initialize_tcti_tabrmd_context(private_tpm_tss_tss2_t *this)
{
#ifdef TSS2_TCTI_TABRMD
size_t tcti_context_size;
uint32_t rval;
/* determine size of tcti context */
rval = tss2_tcti_tabrmd_init(NULL, &tcti_context_size);
if (rval != TSS2_RC_SUCCESS)
{
DBG1(DBG_PTS, "%s could not get tcti_context size: 0x%06x",
LABEL, rval);
return FALSE;
}
/* allocate and initialize memory for tcti context */
this->tcti_context = (TSS2_TCTI_CONTEXT*)malloc(tcti_context_size);
memset(this->tcti_context, 0x00, tcti_context_size);
/* initialize tcti context */
rval = tss2_tcti_tabrmd_init(this->tcti_context, &tcti_context_size);
if (rval != TSS2_RC_SUCCESS)
{
DBG1(DBG_PTS, "%s could not get tcti_context: 0x%06x "
"via tabrmd interface", LABEL, rval);
return FALSE;
}
return TRUE;
#else /* TSS2_TCTI_TABRMD */
return FALSE;
#endif /* TSS2_TCTI_TABRMD */
}
/**
* Initialize TSS2 TCTI Socket context
*/
static bool initialize_tcti_socket_context(private_tpm_tss_tss2_t *this)
{
#ifdef TSS2_TCTI_SOCKET
size_t tcti_context_size;
uint32_t rval;
TCTI_SOCKET_CONF rm_if_config = { TCTI_SOCKET_DEFAULT_ADDRESS,
TCTI_SOCKET_DEFAULT_PORT
};
/* determine size of tcti context */
rval = InitSocketTcti(NULL, &tcti_context_size, &rm_if_config, 0);
if (rval != TSS2_RC_SUCCESS)
{
DBG1(DBG_PTS, "%s could not get tcti_context size: 0x%06x",
LABEL, rval);
return FALSE;
}
/* allocate memory for tcti context */
this->tcti_context = (TSS2_TCTI_CONTEXT*)malloc(tcti_context_size);
/* initialize tcti context */
rval = InitSocketTcti(this->tcti_context, &tcti_context_size,
&rm_if_config, 0);
if (rval != TSS2_RC_SUCCESS)
{
DBG1(DBG_PTS, "%s could not get tcti_context: 0x%06x "
"via socket interface", LABEL, rval);
return FALSE;
}
return TRUE;
#else /* TSS2_TCTI_SOCKET */
return FALSE;
#endif /* TSS2_TCTI_SOCKET */
}
/**
* Initialize TSS2 Sys context
*/
static bool initialize_sys_context(private_tpm_tss_tss2_t *this)
{
uint32_t sys_context_size;
uint32_t rval;
TSS2_ABI_VERSION abi_version = { TSSWG_INTEROP,
TSS_SAPI_FIRST_FAMILY,
TSS_SAPI_FIRST_LEVEL,
TSS_SAPI_FIRST_VERSION
};
/* determine size of sys context */
sys_context_size = Tss2_Sys_GetContextSize(0);
/* allocate memory for sys context */
this->sys_context = malloc(sys_context_size);
/* initialize sys context */
rval = Tss2_Sys_Initialize(this->sys_context, sys_context_size,
this->tcti_context, &abi_version);
if (rval != TSS2_RC_SUCCESS)
{
DBG1(DBG_PTS, "%s could not get sys_context: 0x%06x",
LABEL, rval);
return FALSE;
}
/* get a list of supported algorithms and ECC curves */
return get_algs_capability(this);
}
/**
* Finalize TSS context
*/
static void finalize_context(private_tpm_tss_tss2_t *this)
{
if (this->tcti_context)
{
tss2_tcti_finalize(this->tcti_context);
free(this->tcti_context);
}
if (this->sys_context)
{
Tss2_Sys_Finalize(this->sys_context);
free(this->sys_context);
}
}
METHOD(tpm_tss_t, get_version, tpm_version_t,
private_tpm_tss_tss2_t *this)
{
return TPM_VERSION_2_0;
}
METHOD(tpm_tss_t, get_version_info, chunk_t,
private_tpm_tss_tss2_t *this)
{
return this->version_info;
}
/**
* read the public key portion of a TSS 2.0 key from NVRAM
*/
bool read_public(private_tpm_tss_tss2_t *this, TPMI_DH_OBJECT handle,
TPM2B_PUBLIC *public)
{
uint32_t rval;
TPM2B_NAME name = { { sizeof(TPM2B_NAME)-2, } };
TPM2B_NAME qualified_name = { { sizeof(TPM2B_NAME)-2, } };
TPMS_AUTH_RESPONSE session_data;
TSS2_SYS_RSP_AUTHS sessions_data;
TPMS_AUTH_RESPONSE *session_data_array[1];
session_data_array[0] = &session_data;
sessions_data.rspAuths = &session_data_array[0];
sessions_data.rspAuthsCount = 1;
/* read public key for a given object handle from TPM 2.0 NVRAM */
this->mutex->lock(this->mutex);
rval = Tss2_Sys_ReadPublic(this->sys_context, handle, 0, public, &name,
&qualified_name, &sessions_data);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS, "%s could not read public key from handle 0x%08x: 0x%06x",
LABEL, handle, rval);
return FALSE;
}
return TRUE;
}
METHOD(tpm_tss_t, generate_aik, bool,
private_tpm_tss_tss2_t *this, chunk_t ca_modulus, chunk_t *aik_blob,
chunk_t *aik_pubkey, chunk_t *identity_req)
{
return FALSE;
}
METHOD(tpm_tss_t, get_public, chunk_t,
private_tpm_tss_tss2_t *this, uint32_t handle)
{
TPM2B_PUBLIC public = { { 0, } };
TPM_ALG_ID sig_alg, digest_alg;
chunk_t aik_pubkey = chunk_empty;
if (!read_public(this, handle, &public))
{
return chunk_empty;
}
/* convert TSS 2.0 public key blot into PKCS#1 format */
switch (public.t.publicArea.type)
{
case TPM_ALG_RSA:
{
TPM2B_PUBLIC_KEY_RSA *rsa;
TPMT_RSA_SCHEME *scheme;
chunk_t aik_exponent = chunk_from_chars(0x01, 0x00, 0x01);
chunk_t aik_modulus;
uint32_t exponent;
scheme = &public.t.publicArea.parameters.rsaDetail.scheme;
sig_alg = scheme->scheme;
digest_alg = scheme->details.anySig.hashAlg;
rsa = &public.t.publicArea.unique.rsa;
aik_modulus = chunk_create(rsa->t.buffer, rsa->t.size);
exponent = htonl(public.t.publicArea.parameters.rsaDetail.exponent);
if (exponent)
{
aik_exponent = chunk_from_thing(exponent);
}
/* subjectPublicKeyInfo encoding of RSA public key */
if (!lib->encoding->encode(lib->encoding, PUBKEY_SPKI_ASN1_DER,
NULL, &aik_pubkey, CRED_PART_RSA_MODULUS, aik_modulus,
CRED_PART_RSA_PUB_EXP, aik_exponent, CRED_PART_END))
{
DBG1(DBG_PTS, "%s subjectPublicKeyInfo encoding of public key "
"failed", LABEL);
return chunk_empty;
}
break;
}
case TPM_ALG_ECC:
{
TPMS_ECC_POINT *ecc;
TPMT_ECC_SCHEME *scheme;
chunk_t ecc_point;
uint8_t *pos;
scheme = &public.t.publicArea.parameters.eccDetail.scheme;
sig_alg = scheme->scheme;
digest_alg = scheme->details.anySig.hashAlg;
ecc = &public.t.publicArea.unique.ecc;
/* allocate space for bit string */
pos = asn1_build_object(&ecc_point, ASN1_BIT_STRING,
2 + ecc->x.t.size + ecc->y.t.size);
/* bit string length is a multiple of octets */
*pos++ = 0x00;
/* uncompressed ECC point format */
*pos++ = 0x04;
/* copy x coordinate of ECC point */
memcpy(pos, ecc->x.t.buffer, ecc->x.t.size);
pos += ecc->x.t.size;
/* copy y coordinate of ECC point */
memcpy(pos, ecc->y.t.buffer, ecc->y.t.size);
/* subjectPublicKeyInfo encoding of ECC public key */
aik_pubkey = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_build_known_oid(OID_EC_PUBLICKEY),
asn1_build_known_oid(ecc->x.t.size == 32 ?
OID_PRIME256V1 : OID_SECT384R1)),
ecc_point);
break;
}
default:
DBG1(DBG_PTS, "%s unsupported key type", LABEL);
return chunk_empty;
}
DBG1(DBG_PTS, "signature algorithm is %N with %N hash",
tpm_alg_id_names, sig_alg, tpm_alg_id_names, digest_alg);
return aik_pubkey;
}
METHOD(tpm_tss_t, supported_signature_schemes, enumerator_t*,
private_tpm_tss_tss2_t *this, uint32_t handle)
{
TPM2B_PUBLIC public = { { 0, } };
hash_algorithm_t digest;
signature_params_t supported_scheme;
if (!read_public(this, handle, &public))
{
return enumerator_create_empty();
}
switch (public.t.publicArea.type)
{
case TPM_ALG_RSA:
{
TPMS_RSA_PARMS *rsa;
TPMT_RSA_SCHEME *scheme;
rsa = &public.t.publicArea.parameters.rsaDetail;
scheme = &rsa->scheme;
digest = hash_alg_from_tpm_alg_id(scheme->details.anySig.hashAlg);
switch (scheme->scheme)
{
case TPM_ALG_RSAPSS:
{
ssize_t salt_len;
salt_len = this->fips_186_4 ? RSA_PSS_SALT_LEN_DEFAULT :
RSA_PSS_SALT_LEN_MAX;
rsa_pss_params_t pss_params = {
.hash = digest,
.mgf1_hash = digest,
.salt_len = salt_len,
};
supported_scheme = (signature_params_t){
.scheme = SIGN_RSA_EMSA_PSS,
.params = &pss_params,
};
if (!rsa_pss_params_set_salt_len(&pss_params, rsa->keyBits))
{
return enumerator_create_empty();
}
break;
}
case TPM_ALG_RSASSA:
supported_scheme = (signature_params_t){
.scheme = signature_scheme_from_oid(
hasher_signature_algorithm_to_oid(digest,
KEY_RSA)),
};
break;
default:
return enumerator_create_empty();
}
break;
}
case TPM_ALG_ECC:
{
TPMT_ECC_SCHEME *scheme;
scheme = &public.t.publicArea.parameters.eccDetail.scheme;
digest = hash_alg_from_tpm_alg_id(scheme->details.anySig.hashAlg);
switch (scheme->scheme)
{
case TPM_ALG_ECDSA:
supported_scheme = (signature_params_t){
.scheme = signature_scheme_from_oid(
hasher_signature_algorithm_to_oid(digest,
KEY_ECDSA)),
};
break;
default:
return enumerator_create_empty();
}
break;
}
default:
DBG1(DBG_PTS, "%s unsupported key type", LABEL);
return enumerator_create_empty();
}
return enumerator_create_single(signature_params_clone(&supported_scheme),
(void*)signature_params_destroy);
}
METHOD(tpm_tss_t, has_pcr_bank, bool,
private_tpm_tss_tss2_t *this, hash_algorithm_t alg)
{
TPM_ALG_ID alg_id;
int i;
alg_id = hash_alg_to_tpm_alg_id(alg);
for (i = 0; i < this->assigned_pcrs_count; i++)
{
if (this->assigned_pcrs[i] == alg_id)
{
return TRUE;
}
}
return FALSE;
}
/**
* Configure a PCR Selection assuming a maximum of 24 registers
*/
static bool init_pcr_selection(private_tpm_tss_tss2_t *this, uint32_t pcrs,
hash_algorithm_t alg, TPML_PCR_SELECTION *pcr_sel)
{
uint32_t pcr;
/* check if there is an assigned PCR bank for this hash algorithm */
if (!has_pcr_bank(this, alg))
{
DBG1(DBG_PTS, "%s %N hash algorithm not supported by any PCR bank",
LABEL, hash_algorithm_short_names, alg);
return FALSE;
}
/* initialize the PCR Selection structure,*/
pcr_sel->count = 1;
pcr_sel->pcrSelections[0].hash = hash_alg_to_tpm_alg_id(alg);
pcr_sel->pcrSelections[0].sizeofSelect = 3;
pcr_sel->pcrSelections[0].pcrSelect[0] = 0;
pcr_sel->pcrSelections[0].pcrSelect[1] = 0;
pcr_sel->pcrSelections[0].pcrSelect[2] = 0;
/* set the selected PCRs */
for (pcr = 0; pcr < PLATFORM_PCR; pcr++)
{
if (pcrs & (1 << pcr))
{
pcr_sel->pcrSelections[0].pcrSelect[pcr / 8] |= ( 1 << (pcr % 8) );
}
}
return TRUE;
}
METHOD(tpm_tss_t, read_pcr, bool,
private_tpm_tss_tss2_t *this, uint32_t pcr_num, chunk_t *pcr_value,
hash_algorithm_t alg)
{
TPML_PCR_SELECTION pcr_selection;
TPML_DIGEST pcr_values;
uint32_t pcr_update_counter, rval;
uint8_t *pcr_value_ptr;
size_t pcr_value_len;
if (pcr_num >= PLATFORM_PCR)
{
DBG1(DBG_PTS, "%s maximum number of supported PCR is %d",
LABEL, PLATFORM_PCR);
return FALSE;
}
if (!init_pcr_selection(this, (1 << pcr_num), alg, &pcr_selection))
{
return FALSE;
}
/* initialize the PCR Digest structure */
memset(&pcr_values, 0, sizeof(TPML_DIGEST));
/* read the PCR value */
this->mutex->lock(this->mutex);
rval = Tss2_Sys_PCR_Read(this->sys_context, 0, &pcr_selection,
&pcr_update_counter, &pcr_selection, &pcr_values, 0);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS, "%s PCR bank could not be read: 0x%60x",
LABEL, rval);
return FALSE;
}
pcr_value_ptr = (uint8_t *)pcr_values.digests[0].t.buffer;
pcr_value_len = (size_t) pcr_values.digests[0].t.size;
*pcr_value = chunk_clone(chunk_create(pcr_value_ptr, pcr_value_len));
return TRUE;
}
METHOD(tpm_tss_t, extend_pcr, bool,
private_tpm_tss_tss2_t *this, uint32_t pcr_num, chunk_t *pcr_value,
chunk_t data, hash_algorithm_t alg)
{
uint32_t rval;
TPML_DIGEST_VALUES digest_values;
TPMS_AUTH_COMMAND session_data_cmd;
TPMS_AUTH_RESPONSE session_data_rsp;
TSS2_SYS_CMD_AUTHS sessions_data_cmd;
TSS2_SYS_RSP_AUTHS sessions_data_rsp;
TPMS_AUTH_COMMAND *session_data_cmd_array[1];
TPMS_AUTH_RESPONSE *session_data_rsp_array[1];
session_data_cmd_array[0] = &session_data_cmd;
session_data_rsp_array[0] = &session_data_rsp;
sessions_data_cmd.cmdAuths = &session_data_cmd_array[0];
sessions_data_rsp.rspAuths = &session_data_rsp_array[0];
sessions_data_cmd.cmdAuthsCount = 1;
sessions_data_rsp.rspAuthsCount = 1;
session_data_cmd.sessionHandle = TPM_RS_PW;
session_data_cmd.hmac.t.size = 0;
session_data_cmd.nonce.t.size = 0;
*( (uint8_t *)((void *)&session_data_cmd.sessionAttributes ) ) = 0;
/* check if there is an assigned PCR bank for this hash algorithm */
if (!has_pcr_bank(this, alg))
{
DBG1(DBG_PTS, "%s %N hash algorithm not supported by any PCR bank",
LABEL, hash_algorithm_short_names, alg);
return FALSE;
}
digest_values.count = 1;
digest_values.digests[0].hashAlg = hash_alg_to_tpm_alg_id(alg);
switch (alg)
{
case HASH_SHA1:
if (data.len != HASH_SIZE_SHA1)
{
return FALSE;
}
memcpy(digest_values.digests[0].digest.sha1, data.ptr,
HASH_SIZE_SHA1);
break;
case HASH_SHA256:
if (data.len != HASH_SIZE_SHA256)
{
return FALSE;
}
memcpy(digest_values.digests[0].digest.sha256, data.ptr,
HASH_SIZE_SHA256);
break;
case HASH_SHA384:
if (data.len != HASH_SIZE_SHA384)
{
return FALSE;
}
memcpy(digest_values.digests[0].digest.sha384, data.ptr,
HASH_SIZE_SHA384);
break;
case HASH_SHA512:
if (data.len != HASH_SIZE_SHA512)
{
return FALSE;
}
memcpy(digest_values.digests[0].digest.sha512, data.ptr,
HASH_SIZE_SHA512);
break;
default:
return FALSE;
}
/* extend PCR */
this->mutex->lock(this->mutex);
rval = Tss2_Sys_PCR_Extend(this->sys_context, pcr_num, &sessions_data_cmd,
&digest_values, &sessions_data_rsp);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS, "%s PCR %02u could not be extended: 0x%06x",
LABEL, pcr_num, rval);
return FALSE;
}
/* get updated PCR value */
return read_pcr(this, pcr_num, pcr_value, alg);
}
METHOD(tpm_tss_t, quote, bool,
private_tpm_tss_tss2_t *this, uint32_t aik_handle, uint32_t pcr_sel,
hash_algorithm_t alg, chunk_t data, tpm_quote_mode_t *quote_mode,
tpm_tss_quote_info_t **quote_info, chunk_t *quote_sig)
{
chunk_t quoted_chunk, qualified_signer, extra_data, clock_info,
firmware_version, pcr_select, pcr_digest;
hash_algorithm_t pcr_digest_alg;
bio_reader_t *reader;
uint32_t rval;
TPM2B_DATA qualifying_data;
TPML_PCR_SELECTION pcr_selection;
TPM2B_ATTEST quoted = { { sizeof(TPM2B_ATTEST)-2, } };
TPMT_SIG_SCHEME scheme;
TPMT_SIGNATURE sig;
TPMI_ALG_HASH hash_alg;
TPMS_AUTH_COMMAND session_data_cmd;
TPMS_AUTH_RESPONSE session_data_rsp;
TSS2_SYS_CMD_AUTHS sessions_data_cmd;
TSS2_SYS_RSP_AUTHS sessions_data_rsp;
TPMS_AUTH_COMMAND *session_data_cmd_array[1];
TPMS_AUTH_RESPONSE *session_data_rsp_array[1];
session_data_cmd_array[0] = &session_data_cmd;
session_data_rsp_array[0] = &session_data_rsp;
sessions_data_cmd.cmdAuths = &session_data_cmd_array[0];
sessions_data_rsp.rspAuths = &session_data_rsp_array[0];
sessions_data_cmd.cmdAuthsCount = 1;
sessions_data_rsp.rspAuthsCount = 1;
session_data_cmd.sessionHandle = TPM_RS_PW;
session_data_cmd.hmac.t.size = 0;
session_data_cmd.nonce.t.size = 0;
*( (uint8_t *)((void *)&session_data_cmd.sessionAttributes ) ) = 0;
qualifying_data.t.size = data.len;
memcpy(qualifying_data.t.buffer, data.ptr, data.len);
scheme.scheme = TPM_ALG_NULL;
memset(&sig, 0x00, sizeof(sig));
/* set Quote mode */
*quote_mode = TPM_QUOTE_TPM2;
if (!init_pcr_selection(this, pcr_sel, alg, &pcr_selection))
{
return FALSE;
}
this->mutex->lock(this->mutex);
rval = Tss2_Sys_Quote(this->sys_context, aik_handle, &sessions_data_cmd,
&qualifying_data, &scheme, &pcr_selection, "ed,
&sig, &sessions_data_rsp);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS,"%s Tss2_Sys_Quote failed: 0x%06x", LABEL, rval);
return FALSE;
}
quoted_chunk = chunk_create(quoted.t.attestationData, quoted.t.size);
reader = bio_reader_create(chunk_skip(quoted_chunk, 6));
if (!reader->read_data16(reader, &qualified_signer) ||
!reader->read_data16(reader, &extra_data) ||
!reader->read_data (reader, 17, &clock_info) ||
!reader->read_data (reader, 8, &firmware_version) ||
!reader->read_data (reader, 10, &pcr_select) ||
!reader->read_data16(reader, &pcr_digest))
{
DBG1(DBG_PTS, "%s parsing of quoted struct failed", LABEL);
reader->destroy(reader);
return FALSE;
}
reader->destroy(reader);
DBG2(DBG_PTS, "PCR Composite digest: %B", &pcr_digest);
DBG2(DBG_PTS, "TPM Quote Info: %B", "ed_chunk);
DBG2(DBG_PTS, "qualifiedSigner: %B", &qualified_signer);
DBG2(DBG_PTS, "extraData: %B", &extra_data);
DBG2(DBG_PTS, "clockInfo: %B", &clock_info);
DBG2(DBG_PTS, "firmwareVersion: %B", &firmware_version);
DBG2(DBG_PTS, "pcrSelect: %B", &pcr_select);
/* extract signature */
switch (sig.sigAlg)
{
case TPM_ALG_RSASSA:
case TPM_ALG_RSAPSS:
*quote_sig = chunk_clone(
chunk_create(
sig.signature.rsassa.sig.t.buffer,
sig.signature.rsassa.sig.t.size));
hash_alg = sig.signature.rsassa.hash;
break;
case TPM_ALG_ECDSA:
case TPM_ALG_ECDAA:
case TPM_ALG_SM2:
case TPM_ALG_ECSCHNORR:
*quote_sig = chunk_cat("cc",
chunk_create(
sig.signature.ecdsa.signatureR.t.buffer,
sig.signature.ecdsa.signatureR.t.size),
chunk_create(
sig.signature.ecdsa.signatureS.t.buffer,
sig.signature.ecdsa.signatureS.t.size));
hash_alg = sig.signature.ecdsa.hash;
break;
default:
DBG1(DBG_PTS, "%s unsupported %N signature algorithm",
LABEL, tpm_alg_id_names, sig.sigAlg);
return FALSE;
}
DBG2(DBG_PTS, "PCR digest algorithm is %N", tpm_alg_id_names, hash_alg);
pcr_digest_alg = hash_alg_from_tpm_alg_id(hash_alg);
DBG2(DBG_PTS, "TPM Quote Signature: %B", quote_sig);
/* Create and initialize Quote Info object */
*quote_info = tpm_tss_quote_info_create(*quote_mode, pcr_digest_alg,
pcr_digest);
(*quote_info)->set_tpm2_info(*quote_info, qualified_signer, clock_info,
pcr_select);
(*quote_info)->set_version_info(*quote_info, firmware_version);
return TRUE;
}
METHOD(tpm_tss_t, sign, bool,
private_tpm_tss_tss2_t *this, uint32_t hierarchy, uint32_t handle,
signature_scheme_t scheme, void *params, chunk_t data, chunk_t pin,
chunk_t *signature)
{
key_type_t key_type;
hash_algorithm_t hash_alg;
rsa_pss_params_t *rsa_pss_params;
uint32_t rval;
TPM_ALG_ID alg_id;
TPM2B_MAX_BUFFER buffer;
TPM2B_DIGEST hash = { { sizeof(TPM2B_DIGEST)-2, } };
TPMT_TK_HASHCHECK validation;
TPM2B_PUBLIC public = { { 0, } };
TPMT_SIG_SCHEME sig_scheme;
TPMT_SIGNATURE sig;
TPMS_AUTH_COMMAND session_data_cmd;
TPMS_AUTH_RESPONSE session_data_rsp;
TSS2_SYS_CMD_AUTHS sessions_data_cmd;
TSS2_SYS_RSP_AUTHS sessions_data_rsp;
TPMS_AUTH_COMMAND *session_data_cmd_array[1];
TPMS_AUTH_RESPONSE *session_data_rsp_array[1];
session_data_cmd_array[0] = &session_data_cmd;
session_data_rsp_array[0] = &session_data_rsp;
sessions_data_cmd.cmdAuths = &session_data_cmd_array[0];
sessions_data_rsp.rspAuths = &session_data_rsp_array[0];
sessions_data_cmd.cmdAuthsCount = 1;
sessions_data_rsp.rspAuthsCount = 1;
session_data_cmd.sessionHandle = TPM_RS_PW;
session_data_cmd.nonce.t.size = 0;
session_data_cmd.hmac.t.size = 0;
if (pin.len > 0)
{
session_data_cmd.hmac.t.size = min(sizeof(session_data_cmd.hmac.t) - 2,
pin.len);
memcpy(session_data_cmd.hmac.t.buffer, pin.ptr,
session_data_cmd.hmac.t.size);
}
*( (uint8_t *)((void *)&session_data_cmd.sessionAttributes ) ) = 0;
if (scheme == SIGN_RSA_EMSA_PSS)
{
key_type = KEY_RSA;
rsa_pss_params = (rsa_pss_params_t *)params;
hash_alg = rsa_pss_params->hash;
}
else
{
key_type = key_type_from_signature_scheme(scheme);
hash_alg = hasher_from_signature_scheme(scheme, NULL);
}
/* Check if hash algorithm is supported by TPM */
alg_id = hash_alg_to_tpm_alg_id(hash_alg);
if (!is_supported_alg(this, alg_id))
{
DBG1(DBG_PTS, "%s %N hash algorithm not supported by TPM",
LABEL, hash_algorithm_short_names, hash_alg);
return FALSE;
}
/* Get public key */
if (!read_public(this, handle, &public))
{
return FALSE;
}
if (key_type == KEY_RSA && public.t.publicArea.type == TPM_ALG_RSA)
{
if (scheme == SIGN_RSA_EMSA_PSS)
{
sig_scheme.scheme = TPM_ALG_RSAPSS;
sig_scheme.details.rsapss.hashAlg = alg_id;
}
else
{
sig_scheme.scheme = TPM_ALG_RSASSA;
sig_scheme.details.rsassa.hashAlg = alg_id;
}
}
else if (key_type == KEY_ECDSA && public.t.publicArea.type == TPM_ALG_ECC)
{
sig_scheme.scheme = TPM_ALG_ECDSA;
sig_scheme.details.ecdsa.hashAlg = alg_id;
}
else
{
DBG1(DBG_PTS, "%s signature scheme %N not supported by TPM key",
LABEL, signature_scheme_names, scheme);
return FALSE;
}
if (data.len <= MAX_DIGEST_BUFFER)
{
memcpy(buffer.t.buffer, data.ptr, data.len);
buffer.t.size = data.len;
this->mutex->lock(this->mutex);
rval = Tss2_Sys_Hash(this->sys_context, 0, &buffer, alg_id, hierarchy,
&hash, &validation, 0);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS,"%s Tss2_Sys_Hash failed: 0x%06x", LABEL, rval);
return FALSE;
}
}
else
{
TPMI_DH_OBJECT sequence_handle;
TPM2B_AUTH null_auth;
null_auth.t.size = 0;
this->mutex->lock(this->mutex);
rval = Tss2_Sys_HashSequenceStart(this->sys_context, 0, &null_auth,
alg_id, &sequence_handle, 0);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS,"%s Tss2_Sys_HashSequenceStart failed: 0x%06x",
LABEL, rval);
this->mutex->unlock(this->mutex);
return FALSE;
}
while (data.len > 0)
{
buffer.t.size = min(data.len, MAX_DIGEST_BUFFER);
memcpy(buffer.t.buffer, data.ptr, buffer.t.size);
data.ptr += buffer.t.size;
data.len -= buffer.t.size;
rval = Tss2_Sys_SequenceUpdate(this->sys_context, sequence_handle,
&sessions_data_cmd, &buffer, 0);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS,"%s Tss2_Sys_SequenceUpdate failed: 0x%06x",
LABEL, rval);
this->mutex->unlock(this->mutex);
return FALSE;
}
}
buffer.t.size = 0;
rval = Tss2_Sys_SequenceComplete(this->sys_context, sequence_handle,
&sessions_data_cmd, &buffer, hierarchy,
&hash, &validation, 0);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS,"%s Tss2_Sys_SequenceComplete failed: 0x%06x",
LABEL, rval);
return FALSE;
}
}
this->mutex->lock(this->mutex);
rval = Tss2_Sys_Sign(this->sys_context, handle, &sessions_data_cmd, &hash,
&sig_scheme, &validation, &sig, &sessions_data_rsp);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS,"%s Tss2_Sys_Sign failed: 0x%06x", LABEL, rval);
return FALSE;
}
/* extract signature */
switch (scheme)
{
case SIGN_RSA_EMSA_PKCS1_SHA1:
case SIGN_RSA_EMSA_PKCS1_SHA2_256:
case SIGN_RSA_EMSA_PKCS1_SHA2_384:
case SIGN_RSA_EMSA_PKCS1_SHA2_512:
*signature = chunk_clone(
chunk_create(
sig.signature.rsassa.sig.t.buffer,
sig.signature.rsassa.sig.t.size));
break;
case SIGN_RSA_EMSA_PSS:
*signature = chunk_clone(
chunk_create(
sig.signature.rsapss.sig.t.buffer,
sig.signature.rsapss.sig.t.size));
break;
case SIGN_ECDSA_256:
case SIGN_ECDSA_384:
case SIGN_ECDSA_521:
*signature = chunk_cat("cc",
chunk_create(
sig.signature.ecdsa.signatureR.t.buffer,
sig.signature.ecdsa.signatureR.t.size),
chunk_create(
sig.signature.ecdsa.signatureS.t.buffer,
sig.signature.ecdsa.signatureS.t.size));
break;
case SIGN_ECDSA_WITH_SHA256_DER:
case SIGN_ECDSA_WITH_SHA384_DER:
case SIGN_ECDSA_WITH_SHA512_DER:
*signature = asn1_wrap(ASN1_SEQUENCE, "mm",
asn1_integer("c",
chunk_create(
sig.signature.ecdsa.signatureR.t.buffer,
sig.signature.ecdsa.signatureR.t.size)),
asn1_integer("c",
chunk_create(
sig.signature.ecdsa.signatureS.t.buffer,
sig.signature.ecdsa.signatureS.t.size)));
break;
default:
DBG1(DBG_PTS, "%s unsupported %N signature scheme",
LABEL, signature_scheme_names, scheme);
return FALSE;
}
return TRUE;
}
METHOD(tpm_tss_t, get_random, bool,
private_tpm_tss_tss2_t *this, size_t bytes, uint8_t *buffer)
{
size_t len, random_len= sizeof(TPM2B_DIGEST)-2;
TPM2B_DIGEST random = { { random_len, } };
uint8_t *pos = buffer;
uint32_t rval;
while (bytes > 0)
{
len = min(bytes, random_len);
this->mutex->lock(this->mutex);
rval = Tss2_Sys_GetRandom(this->sys_context, NULL, len, &random, NULL);
this->mutex->unlock(this->mutex);
if (rval != TSS2_RC_SUCCESS)
{
DBG1(DBG_PTS,"%s Tss2_Sys_GetRandom failed: 0x%06x", LABEL, rval);
return FALSE;
}
memcpy(pos, random.t.buffer, random.t.size);
pos += random.t.size;
bytes -= random.t.size;
}
return TRUE;
}
METHOD(tpm_tss_t, get_data, bool,
private_tpm_tss_tss2_t *this, uint32_t hierarchy, uint32_t handle,
chunk_t pin, chunk_t *data)
{
uint16_t max_data_size, nv_size, nv_offset = 0;
uint32_t rval;
TPMS_CAPABILITY_DATA cap_data;
TPMI_YES_NO more_data;
TPM2B_NAME nv_name = { { sizeof(TPM2B_NAME)-2, } };
TPM2B_NV_PUBLIC nv_public = { { 0, } };
TPM2B_MAX_NV_BUFFER nv_data = { { MAX_NV_BUFFER_SIZE, } };
TPMS_AUTH_COMMAND session_data_cmd;
TPMS_AUTH_RESPONSE session_data_rsp;
TSS2_SYS_CMD_AUTHS sessions_data_cmd;
TSS2_SYS_RSP_AUTHS sessions_data_rsp;
TPMS_AUTH_COMMAND *session_data_cmd_array[1];
TPMS_AUTH_RESPONSE *session_data_rsp_array[1];
/* query maximum TPM data transmission size */
this->mutex->lock(this->mutex);
rval = Tss2_Sys_GetCapability(this->sys_context, 0, TPM_CAP_TPM_PROPERTIES,
TPM_PT_NV_BUFFER_MAX, 1, &more_data, &cap_data, 0);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS,"%s Tss2_Sys_GetCapability failed for "
"TPM_CAP_TPM_PROPERTIES: 0x%06x", LABEL, rval);
return FALSE;
}
max_data_size = min(cap_data.data.tpmProperties.tpmProperty[0].value,
MAX_NV_BUFFER_SIZE);
/* get size of NV object */
this->mutex->lock(this->mutex);
rval = Tss2_Sys_NV_ReadPublic(this->sys_context, handle, 0, &nv_public,
&nv_name, 0);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS,"%s Tss2_Sys_NV_ReadPublic failed: 0x%06x", LABEL, rval);
return FALSE;
}
nv_size = nv_public.t.nvPublic.dataSize;
*data = chunk_alloc(nv_size);
/*prepare NV read session */
session_data_cmd_array[0] = &session_data_cmd;
session_data_rsp_array[0] = &session_data_rsp;
sessions_data_cmd.cmdAuths = &session_data_cmd_array[0];
sessions_data_rsp.rspAuths = &session_data_rsp_array[0];
sessions_data_cmd.cmdAuthsCount = 1;
sessions_data_rsp.rspAuthsCount = 1;
session_data_cmd.sessionHandle = TPM_RS_PW;
session_data_cmd.nonce.t.size = 0;
session_data_cmd.hmac.t.size = 0;
if (pin.len > 0)
{
session_data_cmd.hmac.t.size = min(sizeof(session_data_cmd.hmac.t) - 2,
pin.len);
memcpy(session_data_cmd.hmac.t.buffer, pin.ptr,
session_data_cmd.hmac.t.size);
}
*( (uint8_t *)((void *)&session_data_cmd.sessionAttributes ) ) = 0;
/* read NV data a maximum data size block at a time */
while (nv_size > 0)
{
this->mutex->lock(this->mutex);
rval = Tss2_Sys_NV_Read(this->sys_context, hierarchy, handle,
&sessions_data_cmd, min(nv_size, max_data_size),
nv_offset, &nv_data, &sessions_data_rsp);
this->mutex->unlock(this->mutex);
if (rval != TPM_RC_SUCCESS)
{
DBG1(DBG_PTS,"%s Tss2_Sys_NV_Read failed: 0x%06x", LABEL, rval);
chunk_free(data);
return FALSE;
}
memcpy(data->ptr + nv_offset, nv_data.t.buffer, nv_data.t.size);
nv_offset += nv_data.t.size;
nv_size -= nv_data.t.size;
}
return TRUE;
}
METHOD(tpm_tss_t, get_event_digest, bool,
private_tpm_tss_tss2_t *this, int fd, hash_algorithm_t alg, chunk_t *digest)
{
uint8_t digest_buf[HASH_SIZE_SHA512];
uint32_t digest_count;
size_t digest_len = 0;
hash_algorithm_t hash_alg;
TPM_ALG_ID alg_id;
if (read(fd, &digest_count, 4) != 4)
{
return FALSE;
}
while (digest_count--)
{
if (read(fd, &alg_id, 2) != 2)
{
return FALSE;
}
hash_alg = hash_alg_from_tpm_alg_id(alg_id);
switch (hash_alg)
{
case HASH_SHA1:
digest_len = HASH_SIZE_SHA1;
break;
case HASH_SHA256:
digest_len = HASH_SIZE_SHA256;
break;
case HASH_SHA384:
digest_len = HASH_SIZE_SHA384;
break;
case HASH_SHA512:
digest_len = HASH_SIZE_SHA512;
break;
default:
DBG2(DBG_PTS, "alg_id: 0x%04x", alg_id);
return FALSE;
}
if (hash_alg == alg)
{
*digest = chunk_alloc(digest_len);
if (read(fd, digest->ptr, digest_len) != digest_len)
{
return FALSE;
}
}
else
{
/* read without storing */
if (read(fd, digest_buf, digest_len) != digest_len)
{
return FALSE;
}
}
}
return TRUE;
}
METHOD(tpm_tss_t, destroy, void,
private_tpm_tss_tss2_t *this)
{
finalize_context(this);
this->mutex->destroy(this->mutex);
free(this->version_info.ptr);
free(this);
}
/**
* See header
*/
tpm_tss_t *tpm_tss_tss2_create()
{
private_tpm_tss_tss2_t *this;
bool available;
INIT(this,
.public = {
.get_version = _get_version,
.get_version_info = _get_version_info,
.generate_aik = _generate_aik,
.get_public = _get_public,
.supported_signature_schemes = _supported_signature_schemes,
.has_pcr_bank = _has_pcr_bank,
.read_pcr = _read_pcr,
.extend_pcr = _extend_pcr,
.quote = _quote,
.sign = _sign,
.get_random = _get_random,
.get_data = _get_data,
.get_event_digest = _get_event_digest,
.destroy = _destroy,
},
.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
);
available = initialize_tcti_tabrmd_context(this);
if (!available)
{
available = initialize_tcti_socket_context(this);
}
if (available)
{
available = initialize_sys_context(this);
}
DBG1(DBG_PTS, "TPM 2.0 via TSS2 v1 %savailable", available ? "" : "not ");
if (!available)
{
destroy(this);
return NULL;
}
return &this->public;
}
#else /* TSS_TSS2_V1 */
#ifndef TSS_TSS2_V2
tpm_tss_t *tpm_tss_tss2_create(void)
{
return NULL;
}
#endif /* !TSS_TSS2_V2 */
#endif /* TSS_TSS2_V1 */
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