--- /dev/null
+/*
+ * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <string.h>
+#include <openssl/core_dispatch.h>
+#include <openssl/core_names.h>
+#include <openssl/params.h>
+#include <openssl/err.h>
+#include <openssl/evp.h>
+#include "openssl/param_build.h"
+#include "internal/param_build_set.h"
+#include "prov/implementations.h"
+#include "prov/providercommon.h"
+#include "prov/provider_ctx.h"
+#include "prov/macsignature.h"
+
+
+static OSSL_FUNC_keymgmt_new_fn mac_new;
+static OSSL_FUNC_keymgmt_free_fn mac_free;
+static OSSL_FUNC_keymgmt_gen_init_fn mac_gen_init;
+static OSSL_FUNC_keymgmt_gen_fn mac_gen;
+static OSSL_FUNC_keymgmt_gen_cleanup_fn mac_gen_cleanup;
+static OSSL_FUNC_keymgmt_get_params_fn mac_get_params;
+static OSSL_FUNC_keymgmt_gettable_params_fn mac_gettable_params;
+static OSSL_FUNC_keymgmt_set_params_fn mac_set_params;
+static OSSL_FUNC_keymgmt_settable_params_fn mac_settable_params;
+static OSSL_FUNC_keymgmt_has_fn mac_has;
+static OSSL_FUNC_keymgmt_match_fn mac_match;
+static OSSL_FUNC_keymgmt_import_fn mac_import;
+static OSSL_FUNC_keymgmt_import_types_fn mac_imexport_types;
+static OSSL_FUNC_keymgmt_export_fn mac_export;
+static OSSL_FUNC_keymgmt_export_types_fn mac_imexport_types;
+
+struct mac_gen_ctx {
+ OPENSSL_CTX *libctx;
+ int selection;
+ unsigned char *priv_key;
+ size_t priv_key_len;
+};
+
+MAC_KEY *mac_key_new(OPENSSL_CTX *libctx)
+{
+ MAC_KEY *mackey = OPENSSL_zalloc(sizeof(*mackey));
+
+ if (mackey == NULL)
+ return NULL;
+
+ mackey->lock = CRYPTO_THREAD_lock_new();
+ if (mackey->lock == NULL) {
+ OPENSSL_free(mackey);
+ return NULL;
+ }
+ mackey->libctx = libctx;
+ mackey->refcnt = 1;
+
+ return mackey;
+}
+
+void mac_key_free(MAC_KEY *mackey)
+{
+ int ref = 0;
+
+ if (mackey == NULL)
+ return;
+
+ CRYPTO_DOWN_REF(&mackey->refcnt, &ref, mackey->lock);
+ if (ref > 0)
+ return;
+
+ OPENSSL_secure_clear_free(mackey->priv_key, mackey->priv_key_len);
+ CRYPTO_THREAD_lock_free(mackey->lock);
+ OPENSSL_free(mackey);
+}
+
+int mac_key_up_ref(MAC_KEY *mackey)
+{
+ int ref = 0;
+
+ CRYPTO_UP_REF(&mackey->refcnt, &ref, mackey->lock);
+ return 1;
+}
+
+static void *mac_new(void *provctx)
+{
+ return mac_key_new(PROV_LIBRARY_CONTEXT_OF(provctx));
+}
+
+static void mac_free(void *mackey)
+{
+ mac_key_free(mackey);
+}
+
+static int mac_has(void *keydata, int selection)
+{
+ MAC_KEY *key = keydata;
+ int ok = 0;
+
+ if (key != NULL) {
+ /*
+ * MAC keys always have all the parameters they need (i.e. none).
+ * Therefore we always return with 1, if asked about parameters.
+ * Similarly for public keys.
+ */
+ ok = 1;
+
+ if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
+ ok = key->priv_key != NULL;
+ }
+ return ok;
+}
+
+static int mac_match(const void *keydata1, const void *keydata2, int selection)
+{
+ const MAC_KEY *key1 = keydata1;
+ const MAC_KEY *key2 = keydata2;
+ int ok = 1;
+
+ if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
+ if ((key1->priv_key == NULL && key2->priv_key != NULL)
+ || (key1->priv_key != NULL && key2->priv_key == NULL)
+ || key1->priv_key_len != key2->priv_key_len)
+ ok = 0;
+ else
+ ok = ok && (key1->priv_key == NULL /* implies key2->privkey == NULL */
+ || CRYPTO_memcmp(key1->priv_key, key2->priv_key,
+ key1->priv_key_len) == 0);
+ }
+ return ok;
+}
+
+static int mac_key_fromdata(MAC_KEY *key, const OSSL_PARAM params[])
+{
+ const OSSL_PARAM *p;
+
+ p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
+ if (p != NULL) {
+ if (p->data_type != OSSL_PARAM_OCTET_STRING) {
+ ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
+ return 0;
+ }
+ OPENSSL_secure_clear_free(key->priv_key, key->priv_key_len);
+ key->priv_key = OPENSSL_secure_malloc(p->data_size);
+ if (key->priv_key == NULL) {
+ ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ memcpy(key->priv_key, p->data, p->data_size);
+ key->priv_key_len = p->data_size;
+
+ return 1;
+ }
+ return 0;
+}
+
+static int mac_import(void *keydata, int selection, const OSSL_PARAM params[])
+{
+ MAC_KEY *key = keydata;
+
+ if (key == NULL)
+ return 0;
+
+ if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) == 0)
+ return 0;
+
+ return mac_key_fromdata(key, params);
+}
+
+static int key_to_params(MAC_KEY *key, OSSL_PARAM_BLD *tmpl,
+ OSSL_PARAM params[])
+{
+ if (key == NULL)
+ return 0;
+
+ if (key->priv_key != NULL
+ && !ossl_param_build_set_octet_string(tmpl, params,
+ OSSL_PKEY_PARAM_PRIV_KEY,
+ key->priv_key, key->priv_key_len))
+ return 0;
+
+ return 1;
+}
+
+static int mac_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
+ void *cbarg)
+{
+ MAC_KEY *key = keydata;
+ OSSL_PARAM_BLD *tmpl;
+ OSSL_PARAM *params = NULL;
+ int ret = 0;
+
+ if (key == NULL)
+ return 0;
+
+ tmpl = OSSL_PARAM_BLD_new();
+ if (tmpl == NULL)
+ return 0;
+
+ if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0
+ && !key_to_params(key, tmpl, NULL))
+ goto err;
+
+ params = OSSL_PARAM_BLD_to_param(tmpl);
+ if (params == NULL)
+ goto err;
+
+ ret = param_cb(params, cbarg);
+ OSSL_PARAM_BLD_free_params(params);
+err:
+ OSSL_PARAM_BLD_free(tmpl);
+ return ret;
+}
+
+static const OSSL_PARAM mac_key_types[] = {
+ OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
+ OSSL_PARAM_END
+};
+static const OSSL_PARAM *mac_imexport_types(int selection)
+{
+ if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
+ return mac_key_types;
+ return NULL;
+}
+
+static int mac_get_params(void *key, OSSL_PARAM params[])
+{
+ return key_to_params(key, NULL, params);
+}
+
+static const OSSL_PARAM *mac_gettable_params(void *provctx)
+{
+ static const OSSL_PARAM gettable_params[] = {
+ OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
+ OSSL_PARAM_END
+ };
+ return gettable_params;
+}
+
+static int mac_set_params(void *keydata, const OSSL_PARAM params[])
+{
+ MAC_KEY *key = keydata;
+ const OSSL_PARAM *p;
+
+ if (key == NULL)
+ return 0;
+
+ p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
+ if (p != NULL)
+ return mac_key_fromdata(key, params);
+
+ return 1;
+}
+
+static const OSSL_PARAM *mac_settable_params(void *provctx)
+{
+ static const OSSL_PARAM settable_params[] = {
+ OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
+ OSSL_PARAM_END
+ };
+ return settable_params;
+}
+
+static void *mac_gen_init(void *provctx, int selection)
+{
+ OPENSSL_CTX *libctx = PROV_LIBRARY_CONTEXT_OF(provctx);
+ struct mac_gen_ctx *gctx = NULL;
+
+ if ((gctx = OPENSSL_malloc(sizeof(*gctx))) != NULL) {
+ gctx->libctx = libctx;
+ gctx->selection = selection;
+ }
+ return gctx;
+}
+
+
+static int mac_gen_set_params(void *genctx, const OSSL_PARAM params[])
+{
+ struct mac_gen_ctx *gctx = genctx;
+ const OSSL_PARAM *p;
+
+ if (gctx == NULL)
+ return 0;
+
+ p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
+ if (p != NULL) {
+ if (p->data_type != OSSL_PARAM_OCTET_STRING) {
+ ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
+ return 0;
+ }
+ gctx->priv_key = OPENSSL_secure_malloc(p->data_size);
+ if (gctx->priv_key == NULL) {
+ ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ memcpy(gctx->priv_key, p->data, p->data_size);
+ gctx->priv_key_len = p->data_size;
+ }
+
+ return 1;
+}
+
+static const OSSL_PARAM *mac_gen_settable_params(void *provctx)
+{
+ static OSSL_PARAM settable[] = {
+ OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
+ OSSL_PARAM_END
+ };
+ return settable;
+}
+
+static void *mac_gen(void *genctx, OSSL_CALLBACK *cb, void *cbarg)
+{
+ struct mac_gen_ctx *gctx = genctx;
+ MAC_KEY *key;
+
+ if (gctx == NULL)
+ return NULL;
+
+ if ((key = mac_key_new(gctx->libctx)) == NULL) {
+ ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ /* If we're doing parameter generation then we just return a blank key */
+ if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) == 0)
+ return key;
+
+ if (gctx->priv_key == NULL) {
+ ERR_raise(ERR_LIB_PROV, EVP_R_INVALID_KEY);
+ mac_key_free(key);
+ return NULL;
+ }
+
+ /*
+ * This is horrible but required for backwards compatibility. We don't
+ * actually do real key generation at all. We simply copy the key that was
+ * previously set in the gctx. Hopefully at some point in the future all
+ * of this can be removed and we will only support the EVP_KDF APIs.
+ */
+ key->priv_key = gctx->priv_key;
+ key->priv_key_len = gctx->priv_key_len;
+ gctx->priv_key_len = 0;
+ gctx->priv_key = NULL;
+
+ return key;
+}
+
+static void mac_gen_cleanup(void *genctx)
+{
+ struct mac_gen_ctx *gctx = genctx;
+
+ OPENSSL_secure_clear_free(gctx->priv_key, gctx->priv_key_len);
+ OPENSSL_free(gctx);
+}
+
+const OSSL_DISPATCH mac_keymgmt_functions[] = {
+ { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))mac_new },
+ { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))mac_free },
+ { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))mac_get_params },
+ { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))mac_gettable_params },
+ { OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*) (void))mac_set_params },
+ { OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*) (void))mac_settable_params },
+ { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))mac_has },
+ { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))mac_match },
+ { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))mac_import },
+ { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))mac_imexport_types },
+ { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))mac_export },
+ { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))mac_imexport_types },
+ { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))mac_gen_init },
+ { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))mac_gen_set_params },
+ { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
+ (void (*)(void))mac_gen_settable_params },
+ { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))mac_gen },
+ { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))mac_gen_cleanup },
+ { 0, NULL }
+};
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