diff options
Diffstat (limited to 'src/libtpmtss/plugins/tpm')
| -rw-r--r-- | src/libtpmtss/plugins/tpm/Makefile.am | 21 | ||||
| -rw-r--r-- | src/libtpmtss/plugins/tpm/Makefile.in | 799 | ||||
| -rw-r--r-- | src/libtpmtss/plugins/tpm/tpm_plugin.c | 96 | ||||
| -rw-r--r-- | src/libtpmtss/plugins/tpm/tpm_plugin.h | 42 | ||||
| -rw-r--r-- | src/libtpmtss/plugins/tpm/tpm_private_key.c | 239 | ||||
| -rw-r--r-- | src/libtpmtss/plugins/tpm/tpm_private_key.h | 49 | ||||
| -rw-r--r-- | src/libtpmtss/plugins/tpm/tpm_rng.c | 94 | ||||
| -rw-r--r-- | src/libtpmtss/plugins/tpm/tpm_rng.h | 47 |
8 files changed, 1387 insertions, 0 deletions
diff --git a/src/libtpmtss/plugins/tpm/Makefile.am b/src/libtpmtss/plugins/tpm/Makefile.am new file mode 100644 index 000000000..281281022 --- /dev/null +++ b/src/libtpmtss/plugins/tpm/Makefile.am @@ -0,0 +1,21 @@ +AM_CPPFLAGS = \ + -I$(top_srcdir)/src/libstrongswan \ + -I$(top_srcdir)/src/libtpmtss + +AM_CFLAGS = \ + $(PLUGIN_CFLAGS) + +if MONOLITHIC +noinst_LTLIBRARIES = libstrongswan-tpm.la +else +plugin_LTLIBRARIES = libstrongswan-tpm.la +libstrongswan_tpm_la_LIBADD = \ + $(top_builddir)/src/libtpmtss/libtpmtss.la +endif + +libstrongswan_tpm_la_SOURCES = \ + tpm_plugin.h tpm_plugin.c \ + tpm_private_key.h tpm_private_key.c \ + tpm_rng.h tpm_rng.c + +libstrongswan_tpm_la_LDFLAGS = -module -avoid-version diff --git a/src/libtpmtss/plugins/tpm/Makefile.in b/src/libtpmtss/plugins/tpm/Makefile.in new file mode 100644 index 000000000..9e2641bc6 --- /dev/null +++ b/src/libtpmtss/plugins/tpm/Makefile.in @@ -0,0 +1,799 @@ +# Makefile.in generated by automake 1.15 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2014 Free Software Foundation, Inc. + +# This Makefile.in is free software; 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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_plugin.h" +#include "tpm_private_key.h" +#include "tpm_rng.h" + +#include <library.h> + +typedef struct private_tpm_plugin_t private_tpm_plugin_t; + +/** + * private data of tpm_plugin + */ +struct private_tpm_plugin_t { + + /** + * public functions + */ + tpm_plugin_t public; +}; + +METHOD(plugin_t, get_name, char*, + private_tpm_plugin_t *this) +{ + return "tpm"; +} + +METHOD(plugin_t, get_features, int, + private_tpm_plugin_t *this, plugin_feature_t *features[]) +{ + static plugin_feature_t f_rng[] = { + PLUGIN_REGISTER(RNG, tpm_rng_create), + PLUGIN_PROVIDE(RNG, RNG_STRONG), + PLUGIN_PROVIDE(RNG, RNG_TRUE), + }; + static plugin_feature_t f_privkey[] = { + PLUGIN_REGISTER(PRIVKEY, tpm_private_key_connect, FALSE), + PLUGIN_PROVIDE(PRIVKEY, KEY_ANY), + }; + static plugin_feature_t f[countof(f_rng) + countof(f_privkey)] = {}; + + static int count = 0; + + if (!count) + { + plugin_features_add(f, f_privkey, countof(f_privkey), &count); + + if (lib->settings->get_bool(lib->settings, + "%s.plugins.tpm.use_rng", FALSE, lib->ns)) + { + plugin_features_add(f, f_rng, countof(f_rng), &count); + } + } + *features = f; + + return count; +} + +METHOD(plugin_t, destroy, void, + private_tpm_plugin_t *this) +{ + free(this); +} + +/* + * see header file + */ +plugin_t *tpm_plugin_create() +{ + private_tpm_plugin_t *this; + + INIT(this, + .public = { + .plugin = { + .get_name = _get_name, + .get_features = _get_features, + .destroy = _destroy, + }, + }, + ); + + return &this->public.plugin; +} diff --git a/src/libtpmtss/plugins/tpm/tpm_plugin.h b/src/libtpmtss/plugins/tpm/tpm_plugin.h new file mode 100644 index 000000000..bf419b328 --- /dev/null +++ b/src/libtpmtss/plugins/tpm/tpm_plugin.h @@ -0,0 +1,42 @@ +/* + * Copyright (C) 2017 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 tpm + * @ingroup plugins + * + * @defgroup tpm_plugin tpm_plugin + * @{ @ingroup tpm + */ + +#ifndef TPM_PLUGIN_H_ +#define TPM_PLUGIN_H_ + +#include <plugins/plugin.h> + +typedef struct tpm_plugin_t tpm_plugin_t; + +/** + * Plugin providing TPM token support. + */ +struct tpm_plugin_t { + + /** + * Implements plugin interface, + */ + plugin_t plugin; +}; + +#endif /** TPM_PLUGIN_H_ @}*/ diff --git a/src/libtpmtss/plugins/tpm/tpm_private_key.c b/src/libtpmtss/plugins/tpm/tpm_private_key.c new file mode 100644 index 000000000..bd5a8baeb --- /dev/null +++ b/src/libtpmtss/plugins/tpm/tpm_private_key.c @@ -0,0 +1,239 @@ +/* + * Copyright (C) 2017 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_private_key.h" + +#include <tpm_tss.h> +#include <utils/debug.h> + +typedef struct private_tpm_private_key_t private_tpm_private_key_t; + +/** + * Private data of an tpm_private_key_t object. + */ +struct private_tpm_private_key_t { + + /** + * Public tpm_private_key_t interface. + */ + tpm_private_key_t public; + + /** + * Token keyid used to reference optional PIN for TPM key + */ + identification_t *keyid; + + /** + * Trusted Platform Module + */ + tpm_tss_t *tpm; + + /** + * TPM key object handle + */ + uint32_t handle; + + /** + * Hierarchy the TPM key object is attached to + */ + uint32_t hierarchy; + + /** + * Associated public key + */ + public_key_t *pubkey; + + /** + * References to this key + */ + refcount_t ref; + +}; + + +METHOD(private_key_t, get_type, key_type_t, + private_tpm_private_key_t *this) +{ + return this->pubkey->get_type(this->pubkey); +} + +METHOD(private_key_t, get_keysize, int, + private_tpm_private_key_t *this) +{ + return this->pubkey->get_keysize(this->pubkey); +} + +METHOD(private_key_t, sign, bool, + private_tpm_private_key_t *this, signature_scheme_t scheme, + chunk_t data, chunk_t *signature) +{ + chunk_t pin = chunk_empty; + shared_key_t *shared; + enumerator_t *enumerator; + + /* check for optional PIN */ + enumerator = lib->credmgr->create_shared_enumerator(lib->credmgr, + SHARED_PIN, this->keyid, NULL); + if (enumerator->enumerate(enumerator, &shared, NULL, NULL)) + { + pin = shared->get_key(shared); + } + enumerator->destroy(enumerator); + + return this->tpm->sign(this->tpm, this->hierarchy, this->handle, scheme, + data, pin, signature); +} + +METHOD(private_key_t, decrypt, bool, + private_tpm_private_key_t *this, encryption_scheme_t scheme, + chunk_t crypt, chunk_t *plain) +{ + return FALSE; +} + +METHOD(private_key_t, get_public_key, public_key_t*, + private_tpm_private_key_t *this) +{ + return this->pubkey->get_ref(this->pubkey); +} + +METHOD(private_key_t, get_fingerprint, bool, + private_tpm_private_key_t *this, cred_encoding_type_t type, + chunk_t *fingerprint) +{ + return this->pubkey->get_fingerprint(this->pubkey, type, fingerprint); +} + +METHOD(private_key_t, get_encoding, bool, + private_tpm_private_key_t *this, cred_encoding_type_t type, + chunk_t *encoding) +{ + return FALSE; +} + +METHOD(private_key_t, get_ref, private_key_t*, + private_tpm_private_key_t *this) +{ + ref_get(&this->ref); + return &this->public.key; +} + +METHOD(private_key_t, destroy, void, + private_tpm_private_key_t *this) +{ + if (ref_put(&this->ref)) + { + DESTROY_IF(this->pubkey); + this->tpm->destroy(this->tpm); + this->keyid->destroy(this->keyid); + free(this); + } +} + +/** + * See header. + */ +tpm_private_key_t *tpm_private_key_connect(key_type_t type, va_list args) +{ + private_tpm_private_key_t *this; + tpm_tss_t *tpm; + chunk_t keyid = chunk_empty, pubkey_blob = chunk_empty; + char handle_str[4]; + size_t len; + uint32_t hierarchy = 0x4000000B; /* TPM_RH_ENDORSEMENT */ + uint32_t handle; + + while (TRUE) + { + switch (va_arg(args, builder_part_t)) + { + case BUILD_PKCS11_KEYID: + keyid = va_arg(args, chunk_t); + continue; + case BUILD_PKCS11_SLOT: + hierarchy = va_arg(args, int); + continue; + case BUILD_PKCS11_MODULE: + va_arg(args, char*); + continue; + case BUILD_END: + break; + default: + return NULL; + } + break; + } + + /* convert keyid into 32 bit TPM key object handle */ + if (!keyid.len) + { + return NULL; + } + len = min(keyid.len, 4); + memset(handle_str, 0x00, 4); + memcpy(handle_str + 4 - len, keyid.ptr + keyid.len - len, len); + handle = untoh32(handle_str); + + /* try to find a TPM 2.0 */ + tpm = tpm_tss_probe(TPM_VERSION_2_0); + if (!tpm) + { + DBG1(DBG_LIB, "no TPM 2.0 found"); + return NULL; + } + + INIT(this, + .public = { + .key = { + .get_type = _get_type, + .sign = _sign, + .decrypt = _decrypt, + .get_keysize = _get_keysize, + .get_public_key = _get_public_key, + .equals = private_key_equals, + .belongs_to = private_key_belongs_to, + .get_fingerprint = _get_fingerprint, + .has_fingerprint = private_key_has_fingerprint, + .get_encoding = _get_encoding, + .get_ref = _get_ref, + .destroy = _destroy, + }, + }, + .tpm = tpm, + .keyid = identification_create_from_encoding(ID_KEY_ID, keyid), + .handle = handle, + .hierarchy = hierarchy, + .ref = 1, + ); + + /* get public key from TPM */ + pubkey_blob = tpm->get_public(tpm, handle); + if (!pubkey_blob.len) + { + destroy(this); + return NULL; + } + this->pubkey = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_ANY, + BUILD_BLOB_ASN1_DER, pubkey_blob, BUILD_END); + chunk_free(&pubkey_blob); + + if (!this->pubkey) + { + destroy(this); + return NULL; + } + + return &this->public; +} diff --git a/src/libtpmtss/plugins/tpm/tpm_private_key.h b/src/libtpmtss/plugins/tpm/tpm_private_key.h new file mode 100644 index 000000000..d3745e2af --- /dev/null +++ b/src/libtpmtss/plugins/tpm/tpm_private_key.h @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2017 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_private_key tpm_private_key + * @{ @ingroup tpm + */ + +#ifndef TPM_PRIVATE_KEY_H_ +#define TPM_PRIVATE_KEY_H_ + +typedef struct tpm_private_key_t tpm_private_key_t; + +#include <credentials/builder.h> +#include <credentials/keys/private_key.h> + +/** + * Private Key implementation for the TPM 2.0 Trusted Platform Module + */ +struct tpm_private_key_t { + + /** + * Implements private_key_t interface. + */ + private_key_t key; +}; + +/** + * Connect to a private key bound to the TPM + * + * @param type type of the key + * @param args builder_part_t argument list + * @return loaded key, NULL on failure + */ +tpm_private_key_t *tpm_private_key_connect(key_type_t type, va_list args); + +#endif /** tpm_PRIVATE_KEY_H_ @}*/ diff --git a/src/libtpmtss/plugins/tpm/tpm_rng.c b/src/libtpmtss/plugins/tpm/tpm_rng.c new file mode 100644 index 000000000..d96bc4936 --- /dev/null +++ b/src/libtpmtss/plugins/tpm/tpm_rng.c @@ -0,0 +1,94 @@ +/* + * Copyright (C) 2017 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_rng.h" + +#include <tpm_tss.h> +#include <utils/debug.h> + +typedef struct private_tpm_rng_t private_tpm_rng_t; + +/** + * Private data of an tpm_rng_t object. + */ +struct private_tpm_rng_t { + + /** + * Public interface. + */ + tpm_rng_t public; + + /** + * Trusted Platform Module + */ + tpm_tss_t *tpm; + +}; + +METHOD(rng_t, get_bytes, bool, + private_tpm_rng_t *this, size_t bytes, uint8_t *buffer) +{ + return this->tpm->get_random(this->tpm, bytes, buffer); +} + +METHOD(rng_t, allocate_bytes, bool, + private_tpm_rng_t *this, size_t bytes, chunk_t *chunk) +{ + *chunk = chunk_alloc(bytes); + if (!get_bytes(this, chunk->len, chunk->ptr)) + { + chunk_clear(chunk); + return FALSE; + } + return TRUE; +} + +METHOD(rng_t, destroy, void, + private_tpm_rng_t *this) +{ + this->tpm->destroy(this->tpm); + free(this); +} + +/* + * Described in header. + */ +tpm_rng_t *tpm_rng_create(rng_quality_t quality) +{ + private_tpm_rng_t *this; + tpm_tss_t *tpm; + + /* try to find a TPM 2.0 */ + tpm = tpm_tss_probe(TPM_VERSION_2_0); + if (!tpm) + { + DBG1(DBG_LIB, "no TPM 2.0 found"); + return NULL; + } + + INIT(this, + .public = { + .rng = { + .get_bytes = _get_bytes, + .allocate_bytes = _allocate_bytes, + .destroy = _destroy, + }, + }, + .tpm = tpm, + ); + + return &this->public; +} + diff --git a/src/libtpmtss/plugins/tpm/tpm_rng.h b/src/libtpmtss/plugins/tpm/tpm_rng.h new file mode 100644 index 000000000..de96816ac --- /dev/null +++ b/src/libtpmtss/plugins/tpm/tpm_rng.h @@ -0,0 +1,47 @@ +/* + * Copyright (C) 2017 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_rng tpm_rng + * @{ @ingroup tpm + */ + +#ifndef TPM_RNG_H_ +#define TPM_RNG_H_ + +typedef struct tpm_rng_t tpm_rng_t; + +#include <library.h> + +/** + * rng_t implementation via TSS 2.0 + */ +struct tpm_rng_t { + + /** + * Implements rng_t. + */ + rng_t rng; +}; + +/** + * Creates a tpm_rng_t instance. + * + * @param quality required quality of randomness + * @return created tpm_rng_t + */ +tpm_rng_t *tpm_rng_create(rng_quality_t quality); + +#endif /** TPM_RNG_H_ @} */ |