-/* crypto/engine/eng_list.c */
-/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
- * project 2000.
+/*
+ * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
+ * 2000.
*/
/* ====================================================================
* Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
*/
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
- * ECDH support in OpenSSL originally developed by
+ * ECDH support in OpenSSL originally developed by
* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
*/
#include "eng_int.h"
-/* The linked-list of pointers to engine types. engine_list_head
- * incorporates an implicit structural reference but engine_list_tail
- * does not - the latter is a computational niceity and only points
- * to something that is already pointed to by its predecessor in the
- * list (or engine_list_head itself). In the same way, the use of the
- * "prev" pointer in each ENGINE is to save excessive list iteration,
- * it doesn't correspond to an extra structural reference. Hence,
- * engine_list_head, and each non-null "next" pointer account for
- * the list itself assuming exactly 1 structural reference on each
- * list member. */
+/*
+ * The linked-list of pointers to engine types. engine_list_head incorporates
+ * an implicit structural reference but engine_list_tail does not - the
+ * latter is a computational niceity and only points to something that is
+ * already pointed to by its predecessor in the list (or engine_list_head
+ * itself). In the same way, the use of the "prev" pointer in each ENGINE is
+ * to save excessive list iteration, it doesn't correspond to an extra
+ * structural reference. Hence, engine_list_head, and each non-null "next"
+ * pointer account for the list itself assuming exactly 1 structural
+ * reference on each list member.
+ */
static ENGINE *engine_list_head = NULL;
static ENGINE *engine_list_tail = NULL;
-/* This cleanup function is only needed internally. If it should be called, we
- * register it with the "ENGINE_cleanup()" stack to be called during cleanup. */
+/*
+ * This cleanup function is only needed internally. If it should be called,
+ * we register it with the "ENGINE_cleanup()" stack to be called during
+ * cleanup.
+ */
static void engine_list_cleanup(void)
- {
- ENGINE *iterator = engine_list_head;
+{
+ ENGINE *iterator = engine_list_head;
- while(iterator != NULL)
- {
- ENGINE_remove(iterator);
- iterator = engine_list_head;
- }
- return;
- }
+ while (iterator != NULL) {
+ ENGINE_remove(iterator);
+ iterator = engine_list_head;
+ }
+ return;
+}
-/* These static functions starting with a lower case "engine_" always
- * take place when CRYPTO_LOCK_ENGINE has been locked up. */
+/*
+ * These static functions starting with a lower case "engine_" always take
+ * place when CRYPTO_LOCK_ENGINE has been locked up.
+ */
static int engine_list_add(ENGINE *e)
- {
- int conflict = 0;
- ENGINE *iterator = NULL;
+{
+ int conflict = 0;
+ ENGINE *iterator = NULL;
- if(e == NULL)
- {
- ENGINEerr(ENGINE_F_ENGINE_LIST_ADD,
- ERR_R_PASSED_NULL_PARAMETER);
- return 0;
- }
- iterator = engine_list_head;
- while(iterator && !conflict)
- {
- conflict = (strcmp(iterator->id, e->id) == 0);
- iterator = iterator->next;
- }
- if(conflict)
- {
- ENGINEerr(ENGINE_F_ENGINE_LIST_ADD,
- ENGINE_R_CONFLICTING_ENGINE_ID);
- return 0;
- }
- if(engine_list_head == NULL)
- {
- /* We are adding to an empty list. */
- if(engine_list_tail)
- {
- ENGINEerr(ENGINE_F_ENGINE_LIST_ADD,
- ENGINE_R_INTERNAL_LIST_ERROR);
- return 0;
- }
- engine_list_head = e;
- e->prev = NULL;
- /* The first time the list allocates, we should register the
- * cleanup. */
- engine_cleanup_add_last(engine_list_cleanup);
- }
- else
- {
- /* We are adding to the tail of an existing list. */
- if((engine_list_tail == NULL) ||
- (engine_list_tail->next != NULL))
- {
- ENGINEerr(ENGINE_F_ENGINE_LIST_ADD,
- ENGINE_R_INTERNAL_LIST_ERROR);
- return 0;
- }
- engine_list_tail->next = e;
- e->prev = engine_list_tail;
- }
- /* Having the engine in the list assumes a structural
- * reference. */
- e->struct_ref++;
- engine_ref_debug(e, 0, 1)
- /* However it came to be, e is the last item in the list. */
- engine_list_tail = e;
- e->next = NULL;
- return 1;
- }
+ if (e == NULL) {
+ ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+ iterator = engine_list_head;
+ while (iterator && !conflict) {
+ conflict = (strcmp(iterator->id, e->id) == 0);
+ iterator = iterator->next;
+ }
+ if (conflict) {
+ ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, ENGINE_R_CONFLICTING_ENGINE_ID);
+ return 0;
+ }
+ if (engine_list_head == NULL) {
+ /* We are adding to an empty list. */
+ if (engine_list_tail) {
+ ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, ENGINE_R_INTERNAL_LIST_ERROR);
+ return 0;
+ }
+ engine_list_head = e;
+ e->prev = NULL;
+ /*
+ * The first time the list allocates, we should register the cleanup.
+ */
+ engine_cleanup_add_last(engine_list_cleanup);
+ } else {
+ /* We are adding to the tail of an existing list. */
+ if ((engine_list_tail == NULL) || (engine_list_tail->next != NULL)) {
+ ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, ENGINE_R_INTERNAL_LIST_ERROR);
+ return 0;
+ }
+ engine_list_tail->next = e;
+ e->prev = engine_list_tail;
+ }
+ /*
+ * Having the engine in the list assumes a structural reference.
+ */
+ e->struct_ref++;
+ engine_ref_debug(e, 0, 1)
+ /* However it came to be, e is the last item in the list. */
+ engine_list_tail = e;
+ e->next = NULL;
+ return 1;
+}
static int engine_list_remove(ENGINE *e)
- {
- ENGINE *iterator;
+{
+ ENGINE *iterator;
- if(e == NULL)
- {
- ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE,
- ERR_R_PASSED_NULL_PARAMETER);
- return 0;
- }
- /* We need to check that e is in our linked list! */
- iterator = engine_list_head;
- while(iterator && (iterator != e))
- iterator = iterator->next;
- if(iterator == NULL)
- {
- ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE,
- ENGINE_R_ENGINE_IS_NOT_IN_LIST);
- return 0;
- }
- /* un-link e from the chain. */
- if(e->next)
- e->next->prev = e->prev;
- if(e->prev)
- e->prev->next = e->next;
- /* Correct our head/tail if necessary. */
- if(engine_list_head == e)
- engine_list_head = e->next;
- if(engine_list_tail == e)
- engine_list_tail = e->prev;
- engine_free_util(e, 0);
- return 1;
- }
+ if (e == NULL) {
+ ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+ /* We need to check that e is in our linked list! */
+ iterator = engine_list_head;
+ while (iterator && (iterator != e))
+ iterator = iterator->next;
+ if (iterator == NULL) {
+ ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE,
+ ENGINE_R_ENGINE_IS_NOT_IN_LIST);
+ return 0;
+ }
+ /* un-link e from the chain. */
+ if (e->next)
+ e->next->prev = e->prev;
+ if (e->prev)
+ e->prev->next = e->next;
+ /* Correct our head/tail if necessary. */
+ if (engine_list_head == e)
+ engine_list_head = e->next;
+ if (engine_list_tail == e)
+ engine_list_tail = e->prev;
+ engine_free_util(e, 0);
+ return 1;
+}
/* Get the first/last "ENGINE" type available. */
ENGINE *ENGINE_get_first(void)
- {
- ENGINE *ret;
+{
+ ENGINE *ret;
- CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
- ret = engine_list_head;
- if(ret)
- {
- ret->struct_ref++;
- engine_ref_debug(ret, 0, 1)
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
- return ret;
- }
+ CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+ ret = engine_list_head;
+ if (ret) {
+ ret->struct_ref++;
+ engine_ref_debug(ret, 0, 1)
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+ return ret;
+}
ENGINE *ENGINE_get_last(void)
- {
- ENGINE *ret;
+{
+ ENGINE *ret;
- CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
- ret = engine_list_tail;
- if(ret)
- {
- ret->struct_ref++;
- engine_ref_debug(ret, 0, 1)
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
- return ret;
- }
+ CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+ ret = engine_list_tail;
+ if (ret) {
+ ret->struct_ref++;
+ engine_ref_debug(ret, 0, 1)
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+ return ret;
+}
/* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */
ENGINE *ENGINE_get_next(ENGINE *e)
- {
- ENGINE *ret = NULL;
- if(e == NULL)
- {
- ENGINEerr(ENGINE_F_ENGINE_GET_NEXT,
- ERR_R_PASSED_NULL_PARAMETER);
- return 0;
- }
- CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
- ret = e->next;
- if(ret)
- {
- /* Return a valid structural refernce to the next ENGINE */
- ret->struct_ref++;
- engine_ref_debug(ret, 0, 1)
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
- /* Release the structural reference to the previous ENGINE */
- ENGINE_free(e);
- return ret;
- }
+{
+ ENGINE *ret = NULL;
+ if (e == NULL) {
+ ENGINEerr(ENGINE_F_ENGINE_GET_NEXT, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+ CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+ ret = e->next;
+ if (ret) {
+ /* Return a valid structural refernce to the next ENGINE */
+ ret->struct_ref++;
+ engine_ref_debug(ret, 0, 1)
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+ /* Release the structural reference to the previous ENGINE */
+ ENGINE_free(e);
+ return ret;
+}
ENGINE *ENGINE_get_prev(ENGINE *e)
- {
- ENGINE *ret = NULL;
- if(e == NULL)
- {
- ENGINEerr(ENGINE_F_ENGINE_GET_PREV,
- ERR_R_PASSED_NULL_PARAMETER);
- return 0;
- }
- CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
- ret = e->prev;
- if(ret)
- {
- /* Return a valid structural reference to the next ENGINE */
- ret->struct_ref++;
- engine_ref_debug(ret, 0, 1)
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
- /* Release the structural reference to the previous ENGINE */
- ENGINE_free(e);
- return ret;
- }
+{
+ ENGINE *ret = NULL;
+ if (e == NULL) {
+ ENGINEerr(ENGINE_F_ENGINE_GET_PREV, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+ CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+ ret = e->prev;
+ if (ret) {
+ /* Return a valid structural reference to the next ENGINE */
+ ret->struct_ref++;
+ engine_ref_debug(ret, 0, 1)
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+ /* Release the structural reference to the previous ENGINE */
+ ENGINE_free(e);
+ return ret;
+}
/* Add another "ENGINE" type into the list. */
int ENGINE_add(ENGINE *e)
- {
- int to_return = 1;
- if(e == NULL)
- {
- ENGINEerr(ENGINE_F_ENGINE_ADD,
- ERR_R_PASSED_NULL_PARAMETER);
- return 0;
- }
- if((e->id == NULL) || (e->name == NULL))
- {
- ENGINEerr(ENGINE_F_ENGINE_ADD,
- ENGINE_R_ID_OR_NAME_MISSING);
- }
- CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
- if(!engine_list_add(e))
- {
- ENGINEerr(ENGINE_F_ENGINE_ADD,
- ENGINE_R_INTERNAL_LIST_ERROR);
- to_return = 0;
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
- return to_return;
- }
+{
+ int to_return = 1;
+ if (e == NULL) {
+ ENGINEerr(ENGINE_F_ENGINE_ADD, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+ if ((e->id == NULL) || (e->name == NULL)) {
+ ENGINEerr(ENGINE_F_ENGINE_ADD, ENGINE_R_ID_OR_NAME_MISSING);
+ return 0;
+ }
+ CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+ if (!engine_list_add(e)) {
+ ENGINEerr(ENGINE_F_ENGINE_ADD, ENGINE_R_INTERNAL_LIST_ERROR);
+ to_return = 0;
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+ return to_return;
+}
/* Remove an existing "ENGINE" type from the array. */
int ENGINE_remove(ENGINE *e)
- {
- int to_return = 1;
- if(e == NULL)
- {
- ENGINEerr(ENGINE_F_ENGINE_REMOVE,
- ERR_R_PASSED_NULL_PARAMETER);
- return 0;
- }
- CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
- if(!engine_list_remove(e))
- {
- ENGINEerr(ENGINE_F_ENGINE_REMOVE,
- ENGINE_R_INTERNAL_LIST_ERROR);
- to_return = 0;
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
- return to_return;
- }
+{
+ int to_return = 1;
+ if (e == NULL) {
+ ENGINEerr(ENGINE_F_ENGINE_REMOVE, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+ CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+ if (!engine_list_remove(e)) {
+ ENGINEerr(ENGINE_F_ENGINE_REMOVE, ENGINE_R_INTERNAL_LIST_ERROR);
+ to_return = 0;
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+ return to_return;
+}
static void engine_cpy(ENGINE *dest, const ENGINE *src)
- {
- dest->id = src->id;
- dest->name = src->name;
+{
+ dest->id = src->id;
+ dest->name = src->name;
#ifndef OPENSSL_NO_RSA
- dest->rsa_meth = src->rsa_meth;
+ dest->rsa_meth = src->rsa_meth;
#endif
#ifndef OPENSSL_NO_DSA
- dest->dsa_meth = src->dsa_meth;
+ dest->dsa_meth = src->dsa_meth;
#endif
#ifndef OPENSSL_NO_DH
- dest->dh_meth = src->dh_meth;
+ dest->dh_meth = src->dh_meth;
#endif
-#ifndef OPENSSL_NO_ECDH
- dest->ecdh_meth = src->ecdh_meth;
+#ifndef OPENSSL_NO_EC
+ dest->ec_meth = src->ec_meth;
#endif
-#ifndef OPENSSL_NO_ECDSA
- dest->ecdsa_meth = src->ecdsa_meth;
-#endif
- dest->rand_meth = src->rand_meth;
- dest->store_meth = src->store_meth;
- dest->ciphers = src->ciphers;
- dest->digests = src->digests;
- dest->pkey_meths = src->pkey_meths;
- dest->destroy = src->destroy;
- dest->init = src->init;
- dest->finish = src->finish;
- dest->ctrl = src->ctrl;
- dest->load_privkey = src->load_privkey;
- dest->load_pubkey = src->load_pubkey;
- dest->cmd_defns = src->cmd_defns;
- dest->flags = src->flags;
- }
+ dest->rand_meth = src->rand_meth;
+ dest->store_meth = src->store_meth;
+ dest->ciphers = src->ciphers;
+ dest->digests = src->digests;
+ dest->pkey_meths = src->pkey_meths;
+ dest->destroy = src->destroy;
+ dest->init = src->init;
+ dest->finish = src->finish;
+ dest->ctrl = src->ctrl;
+ dest->load_privkey = src->load_privkey;
+ dest->load_pubkey = src->load_pubkey;
+ dest->cmd_defns = src->cmd_defns;
+ dest->flags = src->flags;
+}
ENGINE *ENGINE_by_id(const char *id)
- {
- ENGINE *iterator;
- char *load_dir = NULL;
- if(id == NULL)
- {
- ENGINEerr(ENGINE_F_ENGINE_BY_ID,
- ERR_R_PASSED_NULL_PARAMETER);
- return NULL;
- }
- CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
- iterator = engine_list_head;
- while(iterator && (strcmp(id, iterator->id) != 0))
- iterator = iterator->next;
- if(iterator)
- {
- /* We need to return a structural reference. If this is an
- * ENGINE type that returns copies, make a duplicate - otherwise
- * increment the existing ENGINE's reference count. */
- if(iterator->flags & ENGINE_FLAGS_BY_ID_COPY)
- {
- ENGINE *cp = ENGINE_new();
- if(!cp)
- iterator = NULL;
- else
- {
- engine_cpy(cp, iterator);
- iterator = cp;
- }
- }
- else
- {
- iterator->struct_ref++;
- engine_ref_debug(iterator, 0, 1)
- }
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
-#if 0
- if(iterator == NULL)
- {
- ENGINEerr(ENGINE_F_ENGINE_BY_ID,
- ENGINE_R_NO_SUCH_ENGINE);
- ERR_add_error_data(2, "id=", id);
- }
- return iterator;
-#else
- /* EEK! Experimental code starts */
- if(iterator) return iterator;
- /* Prevent infinite recusrion if we're looking for the dynamic engine. */
- if (strcmp(id, "dynamic"))
- {
-#ifdef OPENSSL_SYS_VMS
- if((load_dir = getenv("OPENSSL_ENGINES")) == 0) load_dir = "SSLROOT:[ENGINES]";
-#else
- if((load_dir = getenv("OPENSSL_ENGINES")) == 0) load_dir = ENGINESDIR;
-#endif
- iterator = ENGINE_by_id("dynamic");
- if(!iterator || !ENGINE_ctrl_cmd_string(iterator, "ID", id, 0) ||
- !ENGINE_ctrl_cmd_string(iterator, "DIR_LOAD", "2", 0) ||
- !ENGINE_ctrl_cmd_string(iterator, "DIR_ADD",
- load_dir, 0) ||
- !ENGINE_ctrl_cmd_string(iterator, "LOAD", NULL, 0))
- goto notfound;
- return iterator;
- }
-notfound:
- ENGINEerr(ENGINE_F_ENGINE_BY_ID,ENGINE_R_NO_SUCH_ENGINE);
- ERR_add_error_data(2, "id=", id);
- return NULL;
- /* EEK! Experimental code ends */
-#endif
- }
+{
+ ENGINE *iterator;
+ char *load_dir = NULL;
+ if (id == NULL) {
+ ENGINEerr(ENGINE_F_ENGINE_BY_ID, ERR_R_PASSED_NULL_PARAMETER);
+ return NULL;
+ }
+ CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+ iterator = engine_list_head;
+ while (iterator && (strcmp(id, iterator->id) != 0))
+ iterator = iterator->next;
+ if (iterator != NULL) {
+ /*
+ * We need to return a structural reference. If this is an ENGINE
+ * type that returns copies, make a duplicate - otherwise increment
+ * the existing ENGINE's reference count.
+ */
+ if (iterator->flags & ENGINE_FLAGS_BY_ID_COPY) {
+ ENGINE *cp = ENGINE_new();
+ if (cp == NULL)
+ iterator = NULL;
+ else {
+ engine_cpy(cp, iterator);
+ iterator = cp;
+ }
+ } else {
+ iterator->struct_ref++;
+ engine_ref_debug(iterator, 0, 1)
+ }
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+ if (iterator != NULL)
+ return iterator;
+ /*
+ * Prevent infinite recusrion if we're looking for the dynamic engine.
+ */
+ if (strcmp(id, "dynamic")) {
+# ifdef OPENSSL_SYS_VMS
+ if ((load_dir = getenv("OPENSSL_ENGINES")) == 0)
+ load_dir = "SSLROOT:[ENGINES]";
+# else
+ if ((load_dir = getenv("OPENSSL_ENGINES")) == 0)
+ load_dir = ENGINESDIR;
+# endif
+ iterator = ENGINE_by_id("dynamic");
+ if (!iterator || !ENGINE_ctrl_cmd_string(iterator, "ID", id, 0) ||
+ !ENGINE_ctrl_cmd_string(iterator, "DIR_LOAD", "2", 0) ||
+ !ENGINE_ctrl_cmd_string(iterator, "DIR_ADD",
+ load_dir, 0) ||
+ !ENGINE_ctrl_cmd_string(iterator, "LIST_ADD", "1", 0) ||
+ !ENGINE_ctrl_cmd_string(iterator, "LOAD", NULL, 0))
+ goto notfound;
+ return iterator;
+ }
+ notfound:
+ ENGINE_free(iterator);
+ ENGINEerr(ENGINE_F_ENGINE_BY_ID, ENGINE_R_NO_SUCH_ENGINE);
+ ERR_add_error_data(2, "id=", id);
+ return NULL;
+ /* EEK! Experimental code ends */
+}
int ENGINE_up_ref(ENGINE *e)
- {
- if (e == NULL)
- {
- ENGINEerr(ENGINE_F_ENGINE_UP_REF,ERR_R_PASSED_NULL_PARAMETER);
- return 0;
- }
- CRYPTO_add(&e->struct_ref,1,CRYPTO_LOCK_ENGINE);
- return 1;
- }
+{
+ if (e == NULL) {
+ ENGINEerr(ENGINE_F_ENGINE_UP_REF, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+ CRYPTO_add(&e->struct_ref, 1, CRYPTO_LOCK_ENGINE);
+ return 1;
+}
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