1 files changed, 383 insertions, 0 deletions

diff --git a/src/lib/libcrypto/engine/eng_list.c b/src/lib/libcrypto/engine/eng_list.c
new file mode 100644
index 0000000000..ce48d2255a
--- /dev/null
+++ b/src/lib/libcrypto/engine/eng_list.c
@@ -0,0 +1,383 @@
+/* crypto/engine/eng_list.c */
+/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
+ * project 2000.
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2001 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    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
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <openssl/crypto.h>
+#include "cryptlib.h"
+#include "eng_int.h"
+#include <openssl/engine.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. */
+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. */
+
+static void engine_list_cleanup(void)
+        {
+        ENGINE *iterator = engine_list_head;
+
+        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. */
+static int engine_list_add(ENGINE *e)
+        {
+        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;
+        }
+
+static int engine_list_remove(ENGINE *e)
+        {
+        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;
+        }
+
+/* Get the first/last "ENGINE" type available. */
+ENGINE *ENGINE_get_first(void)
+        {
+        ENGINE *ret;
+
+        CRYPTO_r_lock(CRYPTO_LOCK_ENGINE);
+        ret = engine_list_head;
+        if(ret)
+                {
+                ret->struct_ref++;
+                engine_ref_debug(ret, 0, 1)
+                }
+        CRYPTO_r_unlock(CRYPTO_LOCK_ENGINE);
+        return ret;
+        }
+
+ENGINE *ENGINE_get_last(void)
+        {
+        ENGINE *ret;
+
+        CRYPTO_r_lock(CRYPTO_LOCK_ENGINE);
+                ret = engine_list_tail;
+        if(ret)
+                {
+                ret->struct_ref++;
+                engine_ref_debug(ret, 0, 1)
+                }
+        CRYPTO_r_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_r_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_r_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_r_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_r_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;
+        }
+
+/* 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;
+        }
+
+static void engine_cpy(ENGINE *dest, const ENGINE *src)
+        {
+        dest->id = src->id;
+        dest->name = src->name;
+#ifndef OPENSSL_NO_RSA
+        dest->rsa_meth = src->rsa_meth;
+#endif
+#ifndef OPENSSL_NO_DSA
+        dest->dsa_meth = src->dsa_meth;
+#endif
+#ifndef OPENSSL_NO_DH
+        dest->dh_meth = src->dh_meth;
+#endif
+        dest->rand_meth = src->rand_meth;
+        dest->ciphers = src->ciphers;
+        dest->digests = src->digests;
+        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;
+        if(id == NULL)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_BY_ID,
+                        ERR_R_PASSED_NULL_PARAMETER);
+                return NULL;
+                }
+        CRYPTO_r_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_r_unlock(CRYPTO_LOCK_ENGINE);
+        if(iterator == NULL)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_BY_ID,
+                        ENGINE_R_NO_SUCH_ENGINE);
+                ERR_add_error_data(2, "id=", id);
+                }
+        return iterator;
+        }