Created libtpmtss library handling access to v1.2 and v2.0 TPMs

This commit is contained in:
Andreas Steffen 2016-06-02 23:01:11 +02:00
parent 6337770845
commit c08753bdf4
15 changed files with 929 additions and 405 deletions

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@ -1,2 +0,0 @@
aikgen2.load =
Plugins to load in aikgen2 tool.

2
conf/options/aikpub2.opt Normal file
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@ -0,0 +1,2 @@
aikpub2.load =
Plugins to load in aikpub2 tool.

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@ -62,8 +62,6 @@ ARG_WITH_SUBST([routing-table], [220], [set routing table to use for IPsec
ARG_WITH_SUBST([routing-table-prio], [220], [set priority for IPsec routing table])
ARG_WITH_SUBST([ipsec-script], [ipsec], [change the name of the ipsec script])
ARG_WITH_SUBST([fips-mode], [0], [set openssl FIPS mode: disabled(0), enabled(1), Suite B enabled(2)])
ARG_WITH_SET([tss], [no], [set implementation of the Trusted Computing Group's Software Stack (TSS). Currently the only supported value is "trousers"])
ARG_WITH_SET([capabilities], [no], [set capability dropping library. Currently supported values are "libcap" and "native"])
ARG_WITH_SET([mpz_powm_sec], [yes], [use the more side-channel resistant mpz_powm_sec in libgmp, if available])
ARG_WITH_SET([dev-headers], [no], [install strongSwan development headers to directory.])
@ -303,6 +301,9 @@ ARG_ENABL_SET([python-eggs], [enable build of provided python eggs.])
ARG_ENABL_SET([python-eggs-install],[enable installation of provided python eggs.])
ARG_ENABL_SET([perl-cpan], [enable build of provided perl CPAN module.])
ARG_ENABL_SET([perl-cpan-install],[enable installation of provided CPAN module.])
ARG_ENABL_SET([tss-trousers], [enable the use of the TrouSerS Trusted Software Stack])
ARG_ENABL_SET([tss-tss2], [enable the use of the TSS 2.0 Trusted Software Stack])
# compile options
ARG_ENABL_SET([coverage], [enable lcov coverage report generation.])
ARG_ENABL_SET([leak-detective], [enable malloc hooks to find memory leaks.])
@ -961,16 +962,16 @@ if test x$systemd = xtrue; then
)
fi
if test x$tss = xtrousers; then
if test x$tss_trousers = xtrue; then
AC_CHECK_LIB([tspi],[main],[LIBS="$LIBS"],[AC_MSG_ERROR([TrouSerS library libtspi not found])],[])
AC_CHECK_HEADER([trousers/tss.h],,[AC_MSG_ERROR([TrouSerS header trousers/tss.h not found!])])
AC_DEFINE([TSS_TROUSERS], [], [use TrouSerS library libtspi as TSS implementation])
AC_DEFINE([TSS_TROUSERS], [], [use TrouSerS library libtspi])
fi
if test x$tss = xtss2; then
if test x$tss_tss2 = xtrue; then
AC_CHECK_LIB([tss2],[main],[LIBS="$LIBS"],[AC_MSG_ERROR([TTS 2.0 library libtss2 not found])],[])
AC_CHECK_HEADER([tss2/tpm20.h],,[AC_MSG_ERROR([TSS 2.0 header tss2/tpm20.h not found!])])
AC_DEFINE([TSS_TSS2], [], [use TSS 2.0 library libtss2 as TSS implementation])
AC_DEFINE([TSS_TSS2], [], [use TSS 2.0 library libtss2])
fi
if test x$imv_swid = xtrue; then
PKG_CHECK_MODULES(json, [json-c], [],
@ -1623,6 +1624,7 @@ AM_CONDITIONAL(USE_LIBIPSEC, test x$libipsec = xtrue)
AM_CONDITIONAL(USE_LIBTNCIF, test x$tnc_tnccs = xtrue -o x$imcv = xtrue)
AM_CONDITIONAL(USE_LIBTNCCS, test x$tnc_tnccs = xtrue)
AM_CONDITIONAL(USE_LIBPTTLS, test x$tnc_tnccs = xtrue)
AM_CONDITIONAL(USE_LIBTPMTSS, test x$tss_trousers = xtrue -o x$tss_tss2 = xtrue -o x$aikgen = xtrue -o x$aikpub2 = xtrue )
AM_CONDITIONAL(USE_FILE_CONFIG, test x$stroke = xtrue)
AM_CONDITIONAL(USE_IPSEC_SCRIPT, test x$stroke = xtrue -o x$scepclient = xtrue -o x$conftest = xtrue)
AM_CONDITIONAL(USE_LIBCAP, test x$capabilities = xlibcap)
@ -1632,8 +1634,8 @@ AM_CONDITIONAL(USE_SIMAKA, test x$simaka = xtrue)
AM_CONDITIONAL(USE_TLS, test x$tls = xtrue)
AM_CONDITIONAL(USE_RADIUS, test x$radius = xtrue)
AM_CONDITIONAL(USE_IMCV, test x$imcv = xtrue)
AM_CONDITIONAL(USE_TROUSERS, test x$tss = xtrousers -o x$aikgen = xtrue)
AM_CONDITIONAL(USE_TSS2, test x$tss = xtss2 -o x$aikpub2 = xtrue)
AM_CONDITIONAL(USE_TROUSERS, test x$tss_trousers = xtrue -o x$aikgen = xtrue)
AM_CONDITIONAL(USE_TSS2, test x$tss_tss2 = xtrue -o x$aikpub2 = xtrue)
AM_CONDITIONAL(MONOLITHIC, test x$monolithic = xtrue)
AM_CONDITIONAL(USE_SILENT_RULES, test x$enable_silent_rules = xyes)
AM_CONDITIONAL(COVERAGE, test x$coverage = xtrue)
@ -1874,6 +1876,7 @@ AC_CONFIG_FILES([
src/libcharon/plugins/attr/Makefile
src/libcharon/plugins/attr_sql/Makefile
src/libcharon/tests/Makefile
src/libtpmtss/Makefile
src/stroke/Makefile
src/ipsec/Makefile
src/starter/Makefile

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@ -32,6 +32,10 @@ if USE_LIBPTTLS
SUBDIRS += libpttls
endif
if USE_LIBTPMTSS
SUBDIRS += libtpmtss
endif
if USE_IMCV
SUBDIRS += libimcv
endif

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@ -2,14 +2,13 @@ bin_PROGRAMS = aikgen
aikgen_SOURCES = aikgen.c
aikgen_LDADD = $(top_builddir)/src/libstrongswan/libstrongswan.la
aikgen.o : $(top_builddir)/config.status
aikgen_LDADD = $(top_builddir)/src/libstrongswan/libstrongswan.la \
$(top_builddir)/src/libtpmtss/libtpmtss.la
if USE_TROUSERS
aikgen_LDADD += -ltspi
endif
aikgen.o : $(top_builddir)/config.status
AM_CPPFLAGS = \
-I$(top_srcdir)/src/libstrongswan \
-I$(top_srcdir)/src/libtpmtss \
-DIPSEC_CONFDIR=\"${sysconfdir}\" \
-DPLUGINS=\""${aikgen_plugins}\""

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@ -1,38 +1,25 @@
/*
* Copyright (C) 2014 Andreas Steffen
* Copyright (C) 2014-2016 Andreas Steffen
* HSR Hochschule fuer Technik Rapperswil
*
* Copyright (c) 2008 Hal Finney
* 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>.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* 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.h"
#include <library.h>
#include <utils/debug.h>
#include <utils/optionsfrom.h>
#include <credentials/certificates/x509.h>
#include <credentials/keys/public_key.h>
#include <asn1/oid.h>
#include <asn1/asn1.h>
#include <trousers/tss.h>
#include <trousers/trousers.h>
#include <syslog.h>
#include <getopt.h>
@ -47,9 +34,6 @@
/* default name of AIK public key */
#define DEFAULT_FILENAME_AIKPUBKEY AIK_DIR "aikPub.der"
/* size in bytes of a TSS AIK public key blob */
#define AIK_PUBKEY_BLOB_SIZE 284
/* logging */
static bool log_to_stderr = TRUE;
static bool log_to_syslog = TRUE;
@ -64,9 +48,7 @@ public_key_t *ca_pubkey;
chunk_t ca_modulus;
chunk_t aik_pubkey;
chunk_t aik_keyid;
/* TPM context */
TSS_HCONTEXT hContext;
tpm_tss_t *tpm;
/**
* logging function for aikgen
@ -128,12 +110,13 @@ static void init_log(const char *program)
/**
* @brief exit aikgen
*
* @param status 0 = OK, 1 = general discomfort
* @param status 0 = OK, -1 = general discomfort
*/
static void exit_aikgen(err_t message, ...)
{
int status = 0;
DESTROY_IF(tpm);
DESTROY_IF(cacert);
DESTROY_IF(ca_pubkey);
free(ca_modulus.ptr);
@ -141,13 +124,6 @@ static void exit_aikgen(err_t message, ...)
free(aik_keyid.ptr);
options->destroy(options);
/* clean up TPM context */
if (hContext)
{
Tspi_Context_FreeMemory(hContext, NULL);
Tspi_Context_Close(hContext);
}
/* print any error message to stderr */
if (message != NULL && *message != '\0')
{
@ -158,7 +134,7 @@ static void exit_aikgen(err_t message, ...)
vsnprintf(m, sizeof(m), message, args);
va_end(args);
fprintf(stderr, "error: %s\n", m);
fprintf(stderr, "aikgen error: %s\n", m);
status = -1;
}
library_deinit();
@ -178,7 +154,7 @@ static void usage(const char *message)
" [--aikblob <filename>] [--aikpubkey <filename>] \n"
" [--idreq <filename>] [--force]"
" [--quiet] [--debug <level>]\n"
" aikgen --help\n"
" aikgen --help\n"
"\n"
"Options:\n"
" --cacert (-c) certificate of [privacy] CA\n"
@ -216,25 +192,9 @@ int main(int argc, char *argv[])
bool force = FALSE;
chunk_t identity_req;
chunk_t aik_blob;
chunk_t aik_pubkey_blob;
chunk_t aik_modulus;
chunk_t aik_exponent;
/* TPM variables */
TSS_RESULT result;
TSS_HTPM hTPM;
TSS_HKEY hSRK;
TSS_HKEY hPCAKey;
TSS_HPOLICY hSrkPolicy;
TSS_HPOLICY hTPMPolicy;
TSS_HKEY hIdentKey;
TSS_UUID SRK_UUID = TSS_UUID_SRK;
BYTE secret[] = TSS_WELL_KNOWN_SECRET;
BYTE *IdentityReq;
UINT32 IdentityReqLen;
BYTE *blob;
UINT32 blobLen;
atexit(library_deinit);
if (!library_init(NULL, "aikgen"))
{
@ -370,105 +330,29 @@ int main(int argc, char *argv[])
if (ca_pubkey->get_type(ca_pubkey) != KEY_RSA ||
ca_pubkey->get_keysize(ca_pubkey) != 2048)
{
exit_aikgen("ca public key must be RSA 2048 but is %N %d",
exit_aikgen("CA public key must be RSA 2048 but is %N %d",
key_type_names, ca_pubkey->get_type(ca_pubkey),
ca_pubkey->get_keysize(ca_pubkey));
}
if (!ca_pubkey->get_encoding(ca_pubkey, PUBKEY_RSA_MODULUS, &ca_modulus))
{
exit_aikgen("could not extract RSA modulus from ca public key");
exit_aikgen("could not extract RSA modulus from CA public key");
}
/* initialize TSS context and connect to it */
result = Tspi_Context_Create(&hContext);
if (result != TSS_SUCCESS)
/* try to find a TPM 1.2 */
tpm = tpm_tss_probe(TPM_VERSION_1_2);
if (!tpm)
{
exit_aikgen("tss 0x%x on Tspi_Context_Create", result);
}
result = Tspi_Context_Connect(hContext, NULL);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_Context_Connect", result);
exit_aikgen("no TPM 1.2 found");
}
/* get SRK plus SRK policy and set SRK secret */
result = Tspi_Context_LoadKeyByUUID(hContext, TSS_PS_TYPE_SYSTEM,
SRK_UUID, &hSRK);
if (result != TSS_SUCCESS)
if (!tpm->generate_aik(tpm, ca_modulus, &aik_blob, &aik_pubkey,
&identity_req))
{
exit_aikgen("tss 0x%x on Tspi_Context_LoadKeyByUUID for SRK", result);
}
result = Tspi_GetPolicyObject(hSRK, TSS_POLICY_USAGE, &hSrkPolicy);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_GetPolicyObject for SRK", result);
}
result = Tspi_Policy_SetSecret(hSrkPolicy, TSS_SECRET_MODE_SHA1, 20, secret);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_Policy_SetSecret for SRK", result);
exit_aikgen("could not generate AIK");
}
/* get TPM plus TPM policy and set TPM secret */
result = Tspi_Context_GetTpmObject (hContext, &hTPM);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_Context_GetTpmObject", result);
}
result = Tspi_GetPolicyObject(hTPM, TSS_POLICY_USAGE, &hTPMPolicy);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_GetPolicyObject for TPM", result);
}
result = Tspi_Policy_SetSecret(hTPMPolicy, TSS_SECRET_MODE_SHA1, 20, secret);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_Policy_SetSecret for TPM", result);
}
/* create context for a 2048 bit AIK */
result = Tspi_Context_CreateObject(hContext, TSS_OBJECT_TYPE_RSAKEY,
TSS_KEY_TYPE_IDENTITY | TSS_KEY_SIZE_2048 |
TSS_KEY_VOLATILE | TSS_KEY_NOT_MIGRATABLE, &hIdentKey);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_Context_CreateObject for key", result);
}
/* create context for the Privacy CA public key and assign modulus */
result = Tspi_Context_CreateObject(hContext, TSS_OBJECT_TYPE_RSAKEY,
TSS_KEY_TYPE_LEGACY|TSS_KEY_SIZE_2048, &hPCAKey);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_Context_CreateObject for PCA", result);
}
result = Tspi_SetAttribData (hPCAKey, TSS_TSPATTRIB_RSAKEY_INFO,
TSS_TSPATTRIB_KEYINFO_RSA_MODULUS, ca_modulus.len,
ca_modulus.ptr);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_SetAttribData for PCA modulus", result);
}
result = Tspi_SetAttribUint32(hPCAKey, TSS_TSPATTRIB_KEY_INFO,
TSS_TSPATTRIB_KEYINFO_ENCSCHEME, TSS_ES_RSAESPKCSV15);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_SetAttribUint32 for PCA "
"encryption scheme", result);
}
/* generate AIK */
DBG1(DBG_LIB, "Generating identity key...");
result = Tspi_TPM_CollateIdentityRequest(hTPM, hSRK, hPCAKey, 0, NULL,
hIdentKey, TSS_ALG_AES, &IdentityReqLen, &IdentityReq);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_TPM_CollateIdentityRequest", result);
}
identity_req = chunk_create(IdentityReq, IdentityReqLen);
DBG3(DBG_LIB, "Identity Request: %B", &identity_req);
/* optionally output identity request encrypted with ca public key */
/* optionally output identity request encrypted with CA public key */
if (idreq_filename)
{
if (!chunk_write(identity_req, idreq_filename, 0022, force))
@ -480,24 +364,7 @@ int main(int argc, char *argv[])
idreq_filename, identity_req.len);
}
/* load identity key */
result = Tspi_Key_LoadKey (hIdentKey, hSRK);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_Key_LoadKey for AIK\n", result);
}
/* output AIK private key in TSS blob format */
result = Tspi_GetAttribData (hIdentKey, TSS_TSPATTRIB_KEY_BLOB,
TSS_TSPATTRIB_KEYBLOB_BLOB, &blobLen, &blob);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_GetAttribData for private key blob",
result);
}
aik_blob = chunk_create(blob, blobLen);
DBG3(DBG_LIB, "AIK private key blob: %B", &aik_blob);
/* output AIK private key blob */
if (!chunk_write(aik_blob, aikblob_filename, 0022, force))
{
exit_aikgen("could not write AIK blob file '%s': %s",
@ -506,32 +373,7 @@ int main(int argc, char *argv[])
DBG1(DBG_LIB, "AIK private key blob written to '%s' (%u bytes)",
aikblob_filename, aik_blob.len);
/* output AIK Public Key in TSS blob format */
result = Tspi_GetAttribData (hIdentKey, TSS_TSPATTRIB_KEY_BLOB,
TSS_TSPATTRIB_KEYBLOB_PUBLIC_KEY, &blobLen, &blob);
if (result != TSS_SUCCESS)
{
exit_aikgen("tss 0x%x on Tspi_GetAttribData for public key blob",
result);
}
aik_pubkey_blob = chunk_create(blob, blobLen);
DBG3(DBG_LIB, "AIK public key blob: %B", &aik_pubkey_blob);
/* create a trusted AIK public key */
if (aik_pubkey_blob.len != AIK_PUBKEY_BLOB_SIZE)
{
exit_aikgen("AIK public key is not in TSS blob format");
}
aik_modulus = chunk_skip(aik_pubkey_blob, AIK_PUBKEY_BLOB_SIZE - 256);
aik_exponent = chunk_from_chars(0x01, 0x00, 0x01);
/* output subjectPublicKeyInfo encoding of AIK 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))
{
exit_aikgen("subjectPublicKeyInfo encoding of AIK key failed");
}
/* output AIK public key */
if (!chunk_write(aik_pubkey, aikpubkey_filename, 0022, force))
{
exit_aikgen("could not write AIK public key file '%s': %s",

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@ -2,14 +2,14 @@ bin_PROGRAMS = aikpub2
aikpub2_SOURCES = aikpub2.c
aikpub2_LDADD = $(top_builddir)/src/libstrongswan/libstrongswan.la
aikpub2.o : $(top_builddir)/config.status
aikpub2_LDADD = \
$(top_builddir)/src/libstrongswan/libstrongswan.la \
$(top_builddir)/src/libtpmtss/libtpmtss.la
if USE_TSS2
aikpub2_LDADD += -ltctisocket -ltss2
endif
aikpub2.o : $(top_builddir)/config.status
AM_CPPFLAGS = \
-I$(top_srcdir)/src/libstrongswan \
-I$(top_srcdir)/src/libtpmtss \
-DIPSEC_CONFDIR=\"${sysconfdir}\" \
-DPLUGINS=\""${aikgen_plugins}\""

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@ -13,14 +13,11 @@
* for more details.
*/
#include "tpm_tss.h"
#include <library.h>
#include <utils/debug.h>
#include <utils/optionsfrom.h>
#include <asn1/asn1.h>
#include <asn1/oid.h>
#include <tss2/tpm20.h>
#include <tcti/tcti_socket.h>
#include <syslog.h>
#include <getopt.h>
@ -29,7 +26,7 @@
/* default directory where AIK keys are stored */
#define AIK_DIR IPSEC_CONFDIR "/pts/"
/* default name of AIK private key blob */
/* default name of AIK public key blob */
#define DEFAULT_FILENAME_AIKPUBKEY AIK_DIR "aikPub.der"
/* logging */
@ -40,8 +37,6 @@ static level_t default_loglevel = 1;
/* options read by optionsfrom */
options_t *options;
/* global variables */
chunk_t aik_blob;
chunk_t aik_pubkey;
chunk_t aik_keyid;
@ -105,13 +100,12 @@ static void init_log(const char *program)
/**
* @brief exit aikgen
*
* @param status 0 = OK, 1 = general discomfort
* @param status 0 = OK, -1 = general discomfort
*/
static void exit_aikpub2(err_t message, ...)
{
int status = 0;
free(aik_blob.ptr);
free(aik_pubkey.ptr);
free(aik_keyid.ptr);
options->destroy(options);
@ -126,7 +120,7 @@ static void exit_aikpub2(err_t message, ...)
vsnprintf(m, sizeof(m), message, args);
va_end(args);
fprintf(stderr, "error: %s\n", m);
fprintf(stderr, "aikpub2 error: %s\n", m);
status = -1;
}
library_deinit();
@ -142,12 +136,11 @@ static void exit_aikpub2(err_t message, ...)
static void usage(const char *message)
{
fprintf(stderr,
"Usage: aikpub2 [--in <filename>|--handle <handle>] --out <filename>\n"
"Usage: aikpub2 --handle <handle> --out <filename>\n"
" [--force] [--quiet] [--debug <level>]\n"
" aikpub2 --help\n"
" aikpub2 --help\n"
"\n"
"Options:\n"
" --in (-i) TSS 2.0 AIK public key blob\n"
" --handle (-H) TSS 2.0 AIK object handle\n"
" --out (-o) AIK public key in PKCS #1 format\n"
" --force (-f) force to overwrite existing files\n"
@ -160,105 +153,9 @@ static void usage(const char *message)
exit_aikpub2(message);
}
/**
* Some symbols required by libtctisocket
*/
FILE *outFp;
uint8_t simulator = 1;
int TpmClientPrintf (uint8_t type, const char *format, ...)
{
return 0;
}
/**
* read the public key portion of a TSS 2.0 AIK key from NVRAM
*/
void read_public(TPMI_DH_OBJECT handle, TPM2B_PUBLIC *public)
{
size_t tcti_context_size;
uint32_t sys_context_size, rval;
TCTI_SOCKET_CONF rm_if_config = { DEFAULT_HOSTNAME,
DEFAULT_RESMGR_TPM_PORT
};
TSS2_ABI_VERSION abi_version = { TSSWG_INTEROP,
TSS_SAPI_FIRST_FAMILY,
TSS_SAPI_FIRST_LEVEL,
TSS_SAPI_FIRST_VERSION
};
TPM2B_NAME name = { { sizeof(TPM2B_NAME)-2, } };
TPM2B_NAME qualified_name = { { sizeof(TPM2B_NAME)-2, } };
TSS2_TCTI_CONTEXT *tcti_context;
TSS2_SYS_CONTEXT *sys_context;
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;
/* determine size of tcti context */
rval = InitSocketTcti(NULL, &tcti_context_size, &rm_if_config, 0);
if (rval != TSS2_RC_SUCCESS)
{
exit_aikpub2("could not get tcti_context size: 0x%06x", rval);
}
/* allocate memory for tcti context */
tcti_context = (TSS2_TCTI_CONTEXT*)malloc(tcti_context_size);
/* initialize tcti context */
rval = InitSocketTcti(tcti_context, &tcti_context_size, &rm_if_config, 0);
if (rval != TSS2_RC_SUCCESS)
{
exit_aikpub2("could not get tcti_context: 0x%06x", rval);
}
/* determine size of sys context */
sys_context_size = Tss2_Sys_GetContextSize(0);
/* allocate memory for sys context */
sys_context = malloc(sys_context_size);
/* initialize sys context */
rval = Tss2_Sys_Initialize(sys_context, sys_context_size, tcti_context,
&abi_version);
if (rval != TSS2_RC_SUCCESS)
{
TeardownSocketTcti(tcti_context);
exit_aikpub2("could not get sys_context: 0x%06x", rval);
}
/* always send simulator platform command, ignored by true RM */
PlatformCommand(tcti_context ,MS_SIM_POWER_ON );
PlatformCommand(tcti_context, MS_SIM_NV_ON );
/* read public key for a given object handle from TPM 2.0 NVRAM */
rval = Tss2_Sys_ReadPublic(sys_context, handle, 0, public, &name,
&qualified_name, &sessions_data);
PlatformCommand(tcti_context, MS_SIM_POWER_OFF);
/* clean up connection to TPM 2.0 */
TeardownSocketTcti(tcti_context);
Tss2_Sys_Finalize(sys_context);
free(sys_context);
if (rval != TPM_RC_SUCCESS)
{
exit_aikpub2("could not read TSS 2.0 public key from handle 0x%08x:"
" 0x%06x", handle, rval);
}
}
/**
* @brief main of aikpub2 which generates an Attestation Identity Key (AIK)
* @brief main of aikpub2 which extracts an Attestation Identity Key (AIK)
*
* @param argc number of arguments
* @param argv pointer to the argument values
@ -269,15 +166,11 @@ int main(int argc, char *argv[])
extern char * optarg;
extern int optind;
uint32_t aik_handle = 0;
char *aik_in_filename = NULL;
char *aik_out_filename = DEFAULT_FILENAME_AIKPUBKEY;
chunk_t *aik_mapped;
uint32_t aik_handle = 0;
bool force = FALSE;
hasher_t *hasher;
/* TSS 2.0 variables */
TPM2B_PUBLIC public = { { 0, } };
tpm_tss_t *tpm;
atexit(library_deinit);
if (!library_init(NULL, "aikpub2"))
@ -331,10 +224,6 @@ int main(int argc, char *argv[])
aik_handle = strtoll(optarg, NULL, 16);
continue;
case 'i': /* --in <filename> */
aik_in_filename = optarg;
continue;
case 'o': /* --out <filename> */
aik_out_filename = optarg;
continue;
@ -365,90 +254,26 @@ int main(int argc, char *argv[])
{
exit_aikpub2("plugin loading failed");
}
if (!aik_in_filename && !aik_handle)
if (!aik_handle)
{
usage("either --in or --handle option is required");
usage("--handle option is required");
}
if (aik_handle)
/* try to find a TPM 2.0 */
tpm = tpm_tss_probe(TPM_VERSION_2_0);
if (!tpm)
{
/* read public key blob directly from TPM 2.0 */
read_public(aik_handle, &public);
aik_blob = chunk_clone(chunk_create((u_char*)&public, sizeof(public)));
exit_aikpub2("no TPM 2.0 found");
}
else
/* get AIK public key from TPM */
aik_pubkey = tpm->get_public(tpm, aik_handle);
tpm->destroy(tpm);
/* exit if AIK public key retrieval failed */
if (aik_pubkey.len == 0)
{
/* read stored TPM 2.0 public key blob from a file */
aik_mapped = chunk_map(aik_in_filename, FALSE);
if (!aik_mapped)
{
exit_aikpub2("could not read TSS 2.0 public key file '%s'",
aik_in_filename);
}
aik_blob = chunk_clone(*aik_mapped);
chunk_unmap(aik_mapped);
if (aik_blob.len != sizeof(TPM2B_PUBLIC))
{
exit_aikpub2("size of aikblob is not %d bytes",
sizeof(TPM2B_PUBLIC));
}
public = *(TPM2B_PUBLIC*)aik_blob.ptr;
}
DBG3(DBG_LIB, "TSS 2.0 AIK blob: %B", &aik_blob);
switch (public.t.publicArea.type)
{
case TPM_ALG_RSA:
{
TPM2B_PUBLIC_KEY_RSA *rsa;
chunk_t aik_exponent, aik_modulus;
rsa = &public.t.publicArea.unique.rsa;
aik_modulus = chunk_create(rsa->t.buffer, rsa->t.size);
aik_exponent = chunk_from_chars(0x01, 0x00, 0x01);
/* subjectPublicKeyInfo encoding of AIK RSA 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))
{
exit_aikpub2("subjectPublicKeyInfo encoding of AIK key failed");
}
break;
}
case TPM_ALG_ECC:
{
TPMS_ECC_POINT *ecc;
chunk_t ecc_point;
uint8_t *pos;
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 AIK ECC 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:
exit_aikpub2("unsupported key type");
exit_aikpub2("retrieval of AIK public key failed");
}
/* store AIK subjectPublicKeyInfo to file */

23
src/libtpmtss/Makefile.am Normal file
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@ -0,0 +1,23 @@
AM_CPPFLAGS = \
-I$(top_srcdir)/src/libstrongswan
AM_LDFLAGS = \
-no-undefined
ipseclib_LTLIBRARIES = libtpmtss.la
libtpmtss_la_SOURCES = \
tpm_tss.h tpm_tss.c \
tpm_tss_trousers.h tpm_tss_trousers.c \
tpm_tss_tss2.h tpm_tss_tss2.c
libtpmtss_la_LIBADD = \
$(top_builddir)/src/libstrongswan/libstrongswan.la
if USE_TSS2
libtpmtss_la_LIBADD += -ltctisocket -ltss2
endif
if USE_TROUSERS
libtpmtss_la_LIBADD += -ltspi
endif

46
src/libtpmtss/tpm_tss.c Normal file
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@ -0,0 +1,46 @@
/*
* Copyright (C) 2016 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.h"
#include "tpm_tss_tss2.h"
#include "tpm_tss_trousers.h"
typedef tpm_tss_t*(*tpm_tss_create)();
/**
* See header.
*/
tpm_tss_t *tpm_tss_probe(tpm_version_t version)
{
tpm_tss_create stacks[] = {
tpm_tss_tss2_create,
tpm_tss_trousers_create,
};
tpm_tss_t *tpm;
int i;
for (i = 0; i < countof(stacks); i++)
{
tpm = stacks[i]();
if (tpm)
{
if (version == TPM_VERSION_ANY || version == tpm->get_version(tpm))
{
return tpm;
}
}
}
return NULL;
}

83
src/libtpmtss/tpm_tss.h Normal file
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@ -0,0 +1,83 @@
/*
* Copyright (C) 2016 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.
*/
/**
* @defgroup tpm_tss tpm_tss
* @{ @ingroup libtpmtss
*/
#ifndef TPM_TSS_H_
#define TPM_TSS_H_
#include <library.h>
typedef enum tpm_version_t tpm_version_t;
typedef struct tpm_tss_t tpm_tss_t;
/**
* TPM Versions
*/
enum tpm_version_t {
TPM_VERSION_ANY,
TPM_VERSION_1_2,
TPM_VERSION_2_0,
};
/**
* TPM access via TSS public interface
*/
struct tpm_tss_t {
/**
* Get TPM version supported by TSS
*
* @return TPM version
*/
tpm_version_t (*get_version)(tpm_tss_t *this);
/**
* Generate AIK key pair bound to TPM (TPM 1.2 only)
*
* @param ca_modulus RSA modulus of CA public key
* @param aik_blob AIK private key blob
* @param aik_pubkey AIK public key
* @return TRUE if AIK key generation succeeded
*/
bool (*generate_aik)(tpm_tss_t *this, chunk_t ca_modulus,
chunk_t *aik_blob, chunk_t *aik_pubkey,
chunk_t *identity_req);
/**
* Get public key from TPM using its object handle (TPM 2.0 only)
*
* @param handle key object handle
* @return public key in PKCS#1 format
*/
chunk_t (*get_public)(tpm_tss_t *this, uint32_t handle);
/**
* Destroy a tpm_tss_t.
*/
void (*destroy)(tpm_tss_t *this);
};
/**
* Create a tpm_tss instance.
*
* @param version TPM version that must be supported by TSS
*/
tpm_tss_t *tpm_tss_probe(tpm_version_t version);
#endif /** TPM_TSS_H_ @}*/

View File

@ -0,0 +1,332 @@
/*
* Copyright (C) 2016 Andreas Steffen
* HSR Hochschule fuer Technik Rapperswil
*
* Copyright (c) 2008 Hal Finney
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "tpm_tss_trousers.h"
#ifdef TSS_TROUSERS
#include <trousers/tss.h>
#include <trousers/trousers.h>
#define LABEL "TPM 1.2 -"
/* size in bytes of a TSS AIK public key blob */
#define AIK_PUBKEY_BLOB_SIZE 284
typedef struct private_tpm_tss_trousers_t private_tpm_tss_trousers_t;
/**
* Private data of an tpm_tss_trousers_t object.
*/
struct private_tpm_tss_trousers_t {
/**
* Public tpm_tss_trousers_t interface.
*/
tpm_tss_t public;
/**
* TSS context
*/
TSS_HCONTEXT hContext;
};
/**
* Initialize TSS context
*/
static bool initialize_context(private_tpm_tss_trousers_t *this)
{
TSS_HTPM hTPM;
TSS_RESULT result;
result = Tspi_Context_Create(&this->hContext);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s could not created context: 0x%x", LABEL, result);
return FALSE;
}
result = Tspi_Context_Connect(this->hContext, NULL);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s could not connect with context: 0x%x", LABEL, result);
return FALSE;
}
result = Tspi_Context_GetTpmObject (this->hContext, &hTPM);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s could not get TPM object: 0x%x", LABEL, result);
return FALSE;
}
return TRUE;
}
/**
* Finalize TSS context
*/
static void finalize_context(private_tpm_tss_trousers_t *this)
{
if (this->hContext)
{
Tspi_Context_FreeMemory(this->hContext, NULL);
Tspi_Context_Close(this->hContext);
}
}
METHOD(tpm_tss_t, get_version, tpm_version_t,
private_tpm_tss_trousers_t *this)
{
return TPM_VERSION_1_2;
}
METHOD(tpm_tss_t, generate_aik, bool,
private_tpm_tss_trousers_t *this, chunk_t ca_modulus, chunk_t *aik_blob,
chunk_t *aik_pubkey, chunk_t *identity_req)
{
chunk_t aik_pubkey_blob;
chunk_t aik_modulus;
chunk_t aik_exponent;
TSS_RESULT result;
TSS_HTPM hTPM;
TSS_HKEY hSRK;
TSS_HKEY hPCAKey;
TSS_HPOLICY hSrkPolicy;
TSS_HPOLICY hTPMPolicy;
TSS_HKEY hIdentKey;
TSS_UUID SRK_UUID = TSS_UUID_SRK;
BYTE secret[] = TSS_WELL_KNOWN_SECRET;
BYTE *IdentityReq;
UINT32 IdentityReqLen;
BYTE *blob;
UINT32 blobLen;
/* get SRK plus SRK policy and set SRK secret */
result = Tspi_Context_LoadKeyByUUID(this->hContext, TSS_PS_TYPE_SYSTEM,
SRK_UUID, &hSRK);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s Tspi_Context_LoadKeyByUUID for SRK failed: 0x%x",
LABEL, result);
return FALSE;
}
result = Tspi_GetPolicyObject(hSRK, TSS_POLICY_USAGE, &hSrkPolicy);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s Tspi_GetPolicyObject or SRK failed: 0x%x ",
LABEL, result);
return FALSE;
}
result = Tspi_Policy_SetSecret(hSrkPolicy, TSS_SECRET_MODE_SHA1, 20, secret);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s Tspi_Policy_SetSecret for SRK failed: 0x%x ",
LABEL, result);
return FALSE;
}
/* get TPM plus TPM policy and set TPM secret */
result = Tspi_Context_GetTpmObject (this->hContext, &hTPM);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s Tspi_Context_GetTpmObject failed: 0x%x",
LABEL, result);
return FALSE;
}
result = Tspi_GetPolicyObject(hTPM, TSS_POLICY_USAGE, &hTPMPolicy);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s Tspi_GetPolicyObject for TPM failed: 0x%x",
LABEL, result);
return FALSE;
}
result = Tspi_Policy_SetSecret(hTPMPolicy, TSS_SECRET_MODE_SHA1, 20, secret);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS,"%s Tspi_Policy_SetSecret for TPM failed: 0x%x",
LABEL, result);
return FALSE;
}
/* create context for a 2048 bit AIK */
result = Tspi_Context_CreateObject(this->hContext, TSS_OBJECT_TYPE_RSAKEY,
TSS_KEY_TYPE_IDENTITY | TSS_KEY_SIZE_2048 |
TSS_KEY_VOLATILE | TSS_KEY_NOT_MIGRATABLE, &hIdentKey);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s Tspi_Context_CreateObject for key failed: 0x%x",
LABEL, result);
return FALSE;
}
/* create context for the Privacy CA public key and assign modulus */
result = Tspi_Context_CreateObject(this->hContext, TSS_OBJECT_TYPE_RSAKEY,
TSS_KEY_TYPE_LEGACY|TSS_KEY_SIZE_2048, &hPCAKey);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s Tspi_Context_CreateObject for PCA failed: 0x%x",
LABEL, result);
return FALSE;
}
result = Tspi_SetAttribData (hPCAKey, TSS_TSPATTRIB_RSAKEY_INFO,
TSS_TSPATTRIB_KEYINFO_RSA_MODULUS, ca_modulus.len,
ca_modulus.ptr);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s Tspi_SetAttribData for PCA modulus failed: 0x%x",
LABEL, result);
return FALSE;
}
result = Tspi_SetAttribUint32(hPCAKey, TSS_TSPATTRIB_KEY_INFO,
TSS_TSPATTRIB_KEYINFO_ENCSCHEME, TSS_ES_RSAESPKCSV15);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS,"%s Tspi_SetAttribUint32 for PCA encryption scheme "
"failed: 0x%x", LABEL, result);
return FALSE;
}
/* generate AIK */
DBG1(DBG_LIB, "Generating identity key...");
result = Tspi_TPM_CollateIdentityRequest(hTPM, hSRK, hPCAKey, 0, NULL,
hIdentKey, TSS_ALG_AES, &IdentityReqLen, &IdentityReq);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s Tspi_TPM_CollateIdentityRequest failed: 0x%x",
LABEL, result);
return FALSE;
}
*identity_req = chunk_create(IdentityReq, IdentityReqLen);
DBG3(DBG_LIB, "%s Identity Request: %B", LABEL, identity_req);
/* load identity key */
result = Tspi_Key_LoadKey (hIdentKey, hSRK);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s Tspi_Key_LoadKey for AIK failed: 0x%x",
LABEL, result);
return FALSE;
}
/* output AIK private key in TSS blob format */
result = Tspi_GetAttribData (hIdentKey, TSS_TSPATTRIB_KEY_BLOB,
TSS_TSPATTRIB_KEYBLOB_BLOB, &blobLen, &blob);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s Tspi_GetAttribData for private key blob failed: 0x%x",
LABEL, result);
return FALSE;
}
*aik_blob = chunk_create(blob, blobLen);
DBG3(DBG_LIB, "%s AIK private key blob: %B", LABEL, aik_blob);
/* output AIK Public Key in TSS blob format */
result = Tspi_GetAttribData (hIdentKey, TSS_TSPATTRIB_KEY_BLOB,
TSS_TSPATTRIB_KEYBLOB_PUBLIC_KEY, &blobLen, &blob);
if (result != TSS_SUCCESS)
{
DBG1(DBG_PTS, "%s Tspi_GetAttribData for public key blob failed: 0x%x",
LABEL, result);
return FALSE;
}
aik_pubkey_blob = chunk_create(blob, blobLen);
DBG3(DBG_LIB, "%s AIK public key blob: %B", LABEL, &aik_pubkey_blob);
/* create a trusted AIK public key */
if (aik_pubkey_blob.len != AIK_PUBKEY_BLOB_SIZE)
{
DBG1(DBG_PTS, "%s AIK public key is not in TSS blob format",
LABEL);
return FALSE;
}
aik_modulus = chunk_skip(aik_pubkey_blob, AIK_PUBKEY_BLOB_SIZE - 256);
aik_exponent = chunk_from_chars(0x01, 0x00, 0x01);
/* output subjectPublicKeyInfo encoding of AIK 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 AIK key failed",
LABEL);
return FALSE;
}
return TRUE;
}
METHOD(tpm_tss_t, get_public, chunk_t,
private_tpm_tss_trousers_t *this, uint32_t handle)
{
return chunk_empty;
}
METHOD(tpm_tss_t, destroy, void,
private_tpm_tss_trousers_t *this)
{
finalize_context(this);
free(this);
}
/**
* See header
*/
tpm_tss_t *tpm_tss_trousers_create()
{
private_tpm_tss_trousers_t *this;
bool available;
INIT(this,
.public = {
.get_version = _get_version,
.generate_aik = _generate_aik,
.get_public = _get_public,
.destroy = _destroy,
},
);
available = initialize_context(this);
DBG1(DBG_PTS, "TPM 1.2 via TrouSerS %savailable", available ? "" : "not ");
if (!available)
{
destroy(this);
return NULL;
}
return &this->public;
}
#else /* TSS_TROUSERS */
tpm_tss_t *tpm_tss_trousers_create()
{
return NULL;
}
#endif /* TSS_TROUSERS */

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@ -0,0 +1,31 @@
/*
* Copyright (C) 2016 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.
*/
/**
* @defgroup tpm_tss_trousers tpm_tss_trousers
* @{ @ingroup libtpmtss
*/
#ifndef TPM_TSS_TROUSERS_H_
#define TPM_TSS_TROUSERS_H_
#include "tpm_tss.h"
/**
* Create a tpm_tss_trousers instance.
*/
tpm_tss_t *tpm_tss_trousers_create();
#endif /** TPM_TSS_TROUSERS_H_ @}*/

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@ -0,0 +1,305 @@
/*
* Copyright (C) 2016 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"
#ifdef TSS_TSS2
#include <asn1/asn1.h>
#include <asn1/oid.h>
#include <tss2/tpm20.h>
#include <tcti/tcti_socket.h>
#define LABEL "TPM 2.0 -"
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;
};
/**
* Some symbols required by libtctisocket
*/
FILE *outFp;
uint8_t simulator = 1;
int TpmClientPrintf (uint8_t type, const char *format, ...)
{
return 0;
}
/**
* Initialize TSS context
*/
static bool initialize_context(private_tpm_tss_tss2_t *this)
{
size_t tcti_context_size;
uint32_t sys_context_size;
uint32_t rval;
TCTI_SOCKET_CONF rm_if_config = { DEFAULT_HOSTNAME,
DEFAULT_RESMGR_TPM_PORT
};
TSS2_ABI_VERSION abi_version = { TSSWG_INTEROP,
TSS_SAPI_FIRST_FAMILY,
TSS_SAPI_FIRST_LEVEL,
TSS_SAPI_FIRST_VERSION
};
/* 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",
LABEL, rval);
return FALSE;
}
/* 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;
}
return TRUE;
}
/**
* Finalize TSS context
*/
static void finalize_context(private_tpm_tss_tss2_t *this)
{
if (this->tcti_context)
{
TeardownSocketTcti(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;
}
/**
* read the public key portion of a TSS 2.0 AIK 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;
/* always send simulator platform command, ignored by true RM */
PlatformCommand(this->tcti_context ,MS_SIM_POWER_ON );
PlatformCommand(this->tcti_context, MS_SIM_NV_ON );
/* read public key for a given object handle from TPM 2.0 NVRAM */
rval = Tss2_Sys_ReadPublic(this->sys_context, handle, 0, public, &name,
&qualified_name, &sessions_data);
PlatformCommand(this->tcti_context, MS_SIM_POWER_OFF);
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, } };
chunk_t aik_blob, aik_pubkey = chunk_empty;
if (!read_public(this, handle, &public))
{
return chunk_empty;
}
aik_blob = chunk_create((u_char*)&public, sizeof(public));
DBG3(DBG_LIB, "%s AIK public key blob: %B", LABEL, &aik_blob);
/* convert TSS 2.0 AIK public key blot into PKCS#1 format */
switch (public.t.publicArea.type)
{
case TPM_ALG_RSA:
{
TPM2B_PUBLIC_KEY_RSA *rsa;
chunk_t aik_exponent, aik_modulus;
rsa = &public.t.publicArea.unique.rsa;
aik_modulus = chunk_create(rsa->t.buffer, rsa->t.size);
aik_exponent = chunk_from_chars(0x01, 0x00, 0x01);
/* subjectPublicKeyInfo encoding of AIK RSA 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 AIK key "
"failed", LABEL);
}
break;
}
case TPM_ALG_ECC:
{
TPMS_ECC_POINT *ecc;
chunk_t ecc_point;
uint8_t *pos;
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 AIK ECC 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 AIK key type", LABEL);
}
return aik_pubkey;
}
METHOD(tpm_tss_t, destroy, void,
private_tpm_tss_tss2_t *this)
{
finalize_context(this);
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,
.generate_aik = _generate_aik,
.get_public = _get_public,
.destroy = _destroy,
},
);
available = initialize_context(this);
DBG1(DBG_PTS, "TPM 2.0 via TSS2 %savailable", available ? "" : "not ");
if (!available)
{
destroy(this);
return NULL;
}
return &this->public;
}
#else /* TSS_TSS2 */
tpm_tss_t *tpm_tss_tss2_create()
{
return NULL;
}
#endif /* TSS_TSS2 */

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/*
* Copyright (C) 2016 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.
*/
/**
* @defgroup tpm_tss_tss2 tpm_tss_tss2
* @{ @ingroup libtpmtss
*/
#ifndef TPM_TSS_TSS2_H_
#define TPM_TSS_TSS2_H_
#include "tpm_tss.h"
/**
* Create a tpm_tss_tss2 instance.
*/
tpm_tss_t *tpm_tss_tss2_create();
#endif /** TPM_TSS_TSS2_H_ @}*/