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Diffstat (limited to 'src/libstrongswan/plugins/pkcs11/pkcs11_ec_dh.c')
-rw-r--r--src/libstrongswan/plugins/pkcs11/pkcs11_ec_dh.c306
1 files changed, 0 insertions, 306 deletions
diff --git a/src/libstrongswan/plugins/pkcs11/pkcs11_ec_dh.c b/src/libstrongswan/plugins/pkcs11/pkcs11_ec_dh.c
deleted file mode 100644
index 807d3f5fa..000000000
--- a/src/libstrongswan/plugins/pkcs11/pkcs11_ec_dh.c
+++ /dev/null
@@ -1,306 +0,0 @@
-/*
- * Copyright (C) 2011 Tobias Brunner
- * 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 "pkcs11_ec_dh.h"
-
-#include <debug.h>
-#include <library.h>
-#include <chunk.h>
-#include <asn1/asn1.h>
-#include <asn1/oid.h>
-
-#include "pkcs11_manager.h"
-
-typedef struct private_pkcs11_ec_dh_t private_pkcs11_ec_dh_t;
-
-/**
- * Private data of an pkcs11_ec_dh_t object.
- */
-struct private_pkcs11_ec_dh_t {
-
- /**
- * Public pkcs11_ec_dh_t interface
- */
- pkcs11_ec_dh_t public;
-
- /**
- * PKCS#11 library
- */
- pkcs11_library_t *lib;
-
- /**
- * Session handle for this objct
- */
- CK_SESSION_HANDLE session;
-
- /**
- * Diffie Hellman group number.
- */
- u_int16_t group;
-
- /**
- * EC params (DER-encoded ANSI x9.62 Parameters value)
- */
- chunk_t ecparams;
-
- /**
- * Handle for own private value
- */
- CK_OBJECT_HANDLE pri_key;
-
- /**
- * Own public value
- */
- chunk_t pub_key;
-
- /**
- * Shared secret
- */
- chunk_t secret;
-
-};
-
-METHOD(diffie_hellman_t, set_other_public_value, void,
- private_pkcs11_ec_dh_t *this, chunk_t value)
-{
- chunk_t pubkey = chunk_alloca(value.len + 1);
- CK_OBJECT_CLASS klass = CKO_SECRET_KEY;
- CK_KEY_TYPE type = CKK_GENERIC_SECRET;
- CK_ATTRIBUTE attr[] = {
- { CKA_CLASS, &klass, sizeof(klass) },
- { CKA_KEY_TYPE, &type, sizeof(type) },
- };
- CK_ECDH1_DERIVE_PARAMS params = {
- CKD_NULL,
- 0,
- NULL,
- pubkey.len,
- pubkey.ptr,
- };
- CK_MECHANISM mech = {
- CKM_ECDH1_DERIVE,
- &params,
- sizeof(params),
- };
- CK_OBJECT_HANDLE secret;
- CK_RV rv;
-
- if (!lib->settings->get_bool(lib->settings,
- "libstrongswan.ecp_x_coordinate_only", TRUE))
- { /* we only get the x coordinate back */
- return;
- }
-
- /* we expect the public value to just be the concatenated x and y
- * coordinates, so we have to specify that it is an uncompressed ECPoint */
- pubkey.ptr[0] = 0x04;
- memcpy(pubkey.ptr + 1, value.ptr, value.len);
-
- rv = this->lib->f->C_DeriveKey(this->session, &mech, this->pri_key,
- attr, countof(attr), &secret);
- if (rv != CKR_OK)
- {
- DBG1(DBG_CFG, "C_DeriveKey() error: %N", ck_rv_names, rv);
- return;
- }
- if (!this->lib->get_ck_attribute(this->lib, this->session, secret,
- CKA_VALUE, &this->secret))
- {
- chunk_free(&this->secret);
- return;
- }
-}
-
-METHOD(diffie_hellman_t, get_my_public_value, void,
- private_pkcs11_ec_dh_t *this, chunk_t *value)
-{
- *value = chunk_clone(this->pub_key);
-}
-
-METHOD(diffie_hellman_t, get_shared_secret, status_t,
- private_pkcs11_ec_dh_t *this, chunk_t *secret)
-{
- if (!this->secret.ptr)
- {
- return FAILED;
- }
- *secret = chunk_clone(this->secret);
- return SUCCESS;
-}
-
-METHOD(diffie_hellman_t, get_dh_group, diffie_hellman_group_t,
- private_pkcs11_ec_dh_t *this)
-{
- return this->group;
-}
-
-METHOD(diffie_hellman_t, destroy, void,
- private_pkcs11_ec_dh_t *this)
-{
- this->lib->f->C_CloseSession(this->session);
- chunk_clear(&this->pub_key);
- chunk_clear(&this->secret);
- free(this);
-}
-
-/**
- * Generate ECDH key pair
- */
-static bool generate_key_pair(private_pkcs11_ec_dh_t *this)
-{
- CK_ATTRIBUTE pub_attr[] = {
- { CKA_EC_PARAMS, this->ecparams.ptr, this->ecparams.len },
- };
- CK_MECHANISM mech = {
- CKM_EC_KEY_PAIR_GEN,
- NULL,
- 0,
- };
- CK_OBJECT_HANDLE pub_key;
- CK_RV rv;
-
- rv = this->lib->f->C_GenerateKeyPair(this->session, &mech, pub_attr,
- countof(pub_attr), NULL, 0, &pub_key,
- &this->pri_key);
- if (rv != CKR_OK)
- {
- DBG1(DBG_CFG, "C_GenerateKeyPair() error: %N", ck_rv_names, rv);
- return FALSE;
- }
-
- if (!this->lib->get_ck_attribute(this->lib, this->session, pub_key,
- CKA_EC_POINT, &this->pub_key))
- {
- chunk_free(&this->pub_key);
- return FALSE;
- }
- if (this->pub_key.len <= 0 || this->pub_key.ptr[0] != 0x04)
- { /* we currently only support the point in uncompressed form which
- * looks like this: 0x04 || x || y */
- chunk_clear(&this->pub_key);
- return FALSE;
- }
- this->pub_key = chunk_skip(this->pub_key, 1);
- return TRUE;
-}
-
-/**
- * Find a token we can use for DH algorithm
- */
-static pkcs11_library_t *find_token(CK_SESSION_HANDLE *session)
-{
- enumerator_t *tokens, *mechs;
- pkcs11_manager_t *manager;
- pkcs11_library_t *current, *found = NULL;
- CK_MECHANISM_TYPE type;
- CK_SLOT_ID slot;
-
- manager = lib->get(lib, "pkcs11-manager");
- if (!manager)
- {
- return NULL;
- }
- tokens = manager->create_token_enumerator(manager);
- while (tokens->enumerate(tokens, &current, &slot))
- {
- mechs = current->create_mechanism_enumerator(current, slot);
- while (mechs->enumerate(mechs, &type, NULL))
- {
- /* we assume CKM_EC_KEY_PAIR_GEN is supported too */
- if (type == CKM_ECDH1_DERIVE)
- {
- if (current->f->C_OpenSession(slot, CKF_SERIAL_SESSION,
- NULL, NULL, session) == CKR_OK)
- {
- found = current;
- break;
- }
- }
- }
- mechs->destroy(mechs);
- if (found)
- {
- break;
- }
- }
- tokens->destroy(tokens);
- return found;
-}
-
-/**
- * Lookup the EC params matching the given group
- */
-static chunk_t lookup_ecparams(diffie_hellman_group_t group)
-{
- switch (group)
- {
- case ECP_192_BIT:
- return asn1_build_known_oid(OID_PRIME192V1);
- case ECP_224_BIT:
- return asn1_build_known_oid(OID_SECT224R1);
- case ECP_256_BIT:
- return asn1_build_known_oid(OID_PRIME256V1);
- case ECP_384_BIT:
- return asn1_build_known_oid(OID_SECT384R1);
- case ECP_521_BIT:
- return asn1_build_known_oid(OID_SECT521R1);
- default:
- break;
- }
- return chunk_empty;
-}
-
-/*
- * Described in header.
- */
-pkcs11_ec_dh_t *pkcs11_ec_dh_create(diffie_hellman_group_t group)
-{
- private_pkcs11_ec_dh_t *this;
-
- INIT(this,
- .public = {
- .dh = {
- .get_shared_secret = _get_shared_secret,
- .set_other_public_value = _set_other_public_value,
- .get_my_public_value = _get_my_public_value,
- .get_dh_group = _get_dh_group,
- .destroy = _destroy,
- },
- },
- .group = group,
- );
-
- this->ecparams = lookup_ecparams(group);
- if (!this->ecparams.ptr)
- {
- free(this);
- return NULL;
- }
-
- this->lib = find_token(&this->session);
- if (!this->lib)
- {
- free(this);
- return NULL;
- }
-
- if (!generate_key_pair(this))
- {
- free(this);
- return NULL;
- }
- return &this->public;
-}
-
generated by cgit v1.2.3 (git 2.25.1) at 2025-09-14 09:38:33 +0000