1 files changed, 488 insertions, 0 deletions

diff --git a/src/lib/libcrypto/engine/engine_lib.c b/src/lib/libcrypto/engine/engine_lib.c
new file mode 100644
index 0000000000..1df07af03a
--- /dev/null
+++ b/src/lib/libcrypto/engine/engine_lib.c
@@ -0,0 +1,488 @@
+/* crypto/engine/engine_lib.c */
+/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
+ * project 2000.
+ */
+/* ====================================================================
+ * Copyright (c) 1999 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 "engine_int.h"
+#include <openssl/engine.h>
+
+/* These pointers each have their own "functional reference" when they
+ * are non-NULL. Similarly, when they are retrieved by a call to
+ * ENGINE_get_default_[RSA|DSA|...] the returned pointer is also a
+ * reference and the caller is responsible for freeing that when they
+ * are finished with it (with a call to ENGINE_finish() *NOT* just
+ * ENGINE_free()!!!!!!). */
+static ENGINE *engine_def_rsa = NULL;
+static ENGINE *engine_def_dsa = NULL;
+static ENGINE *engine_def_dh = NULL;
+static ENGINE *engine_def_rand = NULL;
+static ENGINE *engine_def_bn_mod_exp = NULL;
+static ENGINE *engine_def_bn_mod_exp_crt = NULL;
+/* A static "once-only" flag used to control if/when the above were
+ * initialised to suitable start-up defaults. */
+static int engine_def_flag = 0;
+
+/* This is used in certain static utility functions to save code
+ * repetition for per-algorithm functions. */
+typedef enum {
+        ENGINE_TYPE_RSA,
+        ENGINE_TYPE_DSA,
+        ENGINE_TYPE_DH,
+        ENGINE_TYPE_RAND,
+        ENGINE_TYPE_BN_MOD_EXP,
+        ENGINE_TYPE_BN_MOD_EXP_CRT
+        } ENGINE_TYPE;
+
+static void engine_def_check_util(ENGINE **def, ENGINE *val)
+        {
+        *def = val;
+        val->struct_ref++;
+        val->funct_ref++;
+        }
+
+/* In a slight break with convention - this static function must be
+ * called *outside* any locking of CRYPTO_LOCK_ENGINE. */
+static void engine_def_check(void)
+        {
+        ENGINE *e;
+        if(engine_def_flag)
+                return;
+        e = ENGINE_get_first();
+        if(e == NULL)
+                /* The list is empty ... not much we can do! */
+                return;
+        /* We have a structural reference, see if getting a functional
+         * reference is possible. This is done to cope with init errors
+         * in the engine - the following locked code does a bunch of
+         * manual "ENGINE_init"s which do *not* allow such an init
+         * error so this is worth doing. */
+        if(ENGINE_init(e))
+                {
+                CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+                /* Doing another check here prevents an obvious race
+                 * condition because the whole function itself cannot
+                 * be locked. */
+                if(engine_def_flag)
+                        goto skip_set_defaults;
+                /* OK, we got a functional reference, so we get one each
+                 * for the defaults too. */
+                engine_def_check_util(&engine_def_rsa, e);
+                engine_def_check_util(&engine_def_dsa, e);
+                engine_def_check_util(&engine_def_dh, e);
+                engine_def_check_util(&engine_def_rand, e);
+                engine_def_check_util(&engine_def_bn_mod_exp, e);
+                engine_def_check_util(&engine_def_bn_mod_exp_crt, e);
+                engine_def_flag = 1;
+skip_set_defaults:
+                CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+                /* The "if" needs to be balanced out. */
+                ENGINE_finish(e);
+                }
+        /* We need to balance out the fact we obtained a structural
+         * reference to begin with from ENGINE_get_first(). */
+        ENGINE_free(e);
+        }
+
+/* Initialise a engine type for use (or up its functional reference count
+ * if it's already in use). */
+int ENGINE_init(ENGINE *e)
+        {
+        int to_return = 1;
+
+        if(e == NULL)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_INIT,ERR_R_PASSED_NULL_PARAMETER);
+                return 0;
+                }
+        CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+        if((e->funct_ref == 0) && e->init)
+                /* This is the first functional reference and the engine
+                 * requires initialisation so we do it now. */
+                to_return = e->init();
+        if(to_return)
+                {
+                /* OK, we return a functional reference which is also a
+                 * structural reference. */
+                e->struct_ref++;
+                e->funct_ref++;
+                }
+        CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+        return to_return;
+        }
+
+/* Free a functional reference to a engine type */
+int ENGINE_finish(ENGINE *e)
+        {
+        int to_return = 1;
+
+        if(e == NULL)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_FINISH,ERR_R_PASSED_NULL_PARAMETER);
+                return 0;
+                }
+        CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+        if((e->funct_ref == 1) && e->finish)
+#if 0
+                /* This is the last functional reference and the engine
+                 * requires cleanup so we do it now. */
+                to_return = e->finish();
+        if(to_return)
+                {
+                /* Cleanup the functional reference which is also a
+                 * structural reference. */
+                e->struct_ref--;
+                e->funct_ref--;
+                }
+        CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+#else
+                /* I'm going to deliberately do a convoluted version of this
+                 * piece of code because we don't want "finish" functions
+                 * being called inside a locked block of code, if at all
+                 * possible. I'd rather have this call take an extra couple
+                 * of ticks than have throughput serialised on a externally-
+                 * provided callback function that may conceivably never come
+                 * back. :-( */
+                {
+                CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+                /* CODE ALERT: This *IS* supposed to be "=" and NOT "==" :-) */
+                if((to_return = e->finish()))
+                        {
+                        CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+                        /* Cleanup the functional reference which is also a
+                         * structural reference. */
+                        e->struct_ref--;
+                        e->funct_ref--;
+                        CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+                        }
+                }
+        else
+                CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+#endif
+        return to_return;
+        }
+
+EVP_PKEY *ENGINE_load_private_key(ENGINE *e, const char *key_id,
+        const char *passphrase)
+        {
+        EVP_PKEY *pkey;
+
+        if(e == NULL)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_LOAD_PRIVATE_KEY,
+                        ERR_R_PASSED_NULL_PARAMETER);
+                return 0;
+                }
+        CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+        if(e->funct_ref == 0)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_LOAD_PRIVATE_KEY,
+                        ENGINE_R_NOT_INITIALISED);
+                return 0;
+                }
+        if (!e->load_privkey)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_LOAD_PRIVATE_KEY,
+                        ENGINE_R_NO_LOAD_FUNCTION);
+                return 0;
+                }
+        CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+        pkey = e->load_privkey(key_id, passphrase);
+        if (!pkey)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_LOAD_PRIVATE_KEY,
+                        ENGINE_R_FAILED_LOADING_PRIVATE_KEY);
+                return 0;
+                }
+        return pkey;
+        }
+
+EVP_PKEY *ENGINE_load_public_key(ENGINE *e, const char *key_id,
+        const char *passphrase)
+        {
+        EVP_PKEY *pkey;
+
+        if(e == NULL)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_LOAD_PUBLIC_KEY,
+                        ERR_R_PASSED_NULL_PARAMETER);
+                return 0;
+                }
+        CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+        if(e->funct_ref == 0)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_LOAD_PUBLIC_KEY,
+                        ENGINE_R_NOT_INITIALISED);
+                return 0;
+                }
+        if (!e->load_pubkey)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_LOAD_PUBLIC_KEY,
+                        ENGINE_R_NO_LOAD_FUNCTION);
+                return 0;
+                }
+        CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+        pkey = e->load_pubkey(key_id, passphrase);
+        if (!pkey)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_LOAD_PUBLIC_KEY,
+                        ENGINE_R_FAILED_LOADING_PUBLIC_KEY);
+                return 0;
+                }
+        return pkey;
+        }
+
+/* Initialise a engine type for use (or up its functional reference count
+ * if it's already in use). */
+int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
+        {
+        if(e == NULL)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_CTRL,ERR_R_PASSED_NULL_PARAMETER);
+                return 0;
+                }
+        CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+        if(e->struct_ref == 0)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_CTRL,ENGINE_R_NO_REFERENCE);
+                return 0;
+                }
+        if (!e->ctrl)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_CTRL,ENGINE_R_NO_CONTROL_FUNCTION);
+                return 0;
+                }
+        CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+        return e->ctrl(cmd, i, p, f);
+        }
+
+static ENGINE *engine_get_default_type(ENGINE_TYPE t)
+        {
+        ENGINE *ret = NULL;
+
+        /* engine_def_check is lean and mean and won't replace any
+         * prior default engines ... so we must ensure that it is always
+         * the first function to get to touch the default values. */
+        engine_def_check();
+        CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+        switch(t)
+                {
+        case ENGINE_TYPE_RSA:
+                ret = engine_def_rsa; break;
+        case ENGINE_TYPE_DSA:
+                ret = engine_def_dsa; break;
+        case ENGINE_TYPE_DH:
+                ret = engine_def_dh; break;
+        case ENGINE_TYPE_RAND:
+                ret = engine_def_rand; break;
+        case ENGINE_TYPE_BN_MOD_EXP:
+                ret = engine_def_bn_mod_exp; break;
+        case ENGINE_TYPE_BN_MOD_EXP_CRT:
+                ret = engine_def_bn_mod_exp_crt; break;
+                }
+        /* Unforunately we can't do this work outside the lock with a
+         * call to ENGINE_init() because that would leave a race
+         * condition open. */
+        if(ret)
+                {
+                ret->struct_ref++;
+                ret->funct_ref++;
+                }
+        CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+        return ret;
+        }
+
+ENGINE *ENGINE_get_default_RSA(void)
+        {
+        return engine_get_default_type(ENGINE_TYPE_RSA);
+        }
+
+ENGINE *ENGINE_get_default_DSA(void)
+        {
+        return engine_get_default_type(ENGINE_TYPE_DSA);
+        }
+
+ENGINE *ENGINE_get_default_DH(void)
+        {
+        return engine_get_default_type(ENGINE_TYPE_DH);
+        }
+
+ENGINE *ENGINE_get_default_RAND(void)
+        {
+        return engine_get_default_type(ENGINE_TYPE_RAND);
+        }
+
+ENGINE *ENGINE_get_default_BN_mod_exp(void)
+        {
+        return engine_get_default_type(ENGINE_TYPE_BN_MOD_EXP);
+        }
+
+ENGINE *ENGINE_get_default_BN_mod_exp_crt(void)
+        {
+        return engine_get_default_type(ENGINE_TYPE_BN_MOD_EXP_CRT);
+        }
+
+static int engine_set_default_type(ENGINE_TYPE t, ENGINE *e)
+        {
+        ENGINE *old = NULL;
+
+        if(e == NULL)
+                {
+                ENGINEerr(ENGINE_F_ENGINE_SET_DEFAULT_TYPE,
+                        ERR_R_PASSED_NULL_PARAMETER);
+                return 0;
+                }
+        /* engine_def_check is lean and mean and won't replace any
+         * prior default engines ... so we must ensure that it is always
+         * the first function to get to touch the default values. */
+        engine_def_check();
+        /* Attempt to get a functional reference (we need one anyway, but
+         * also, 'e' may be just a structural reference being passed in so
+         * this call may actually be the first). */
+        if(!ENGINE_init(e))
+                {
+                ENGINEerr(ENGINE_F_ENGINE_SET_DEFAULT_TYPE,
+                        ENGINE_R_INIT_FAILED);
+                return 0;
+                }
+        CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
+        switch(t)
+                {
+        case ENGINE_TYPE_RSA:
+                old = engine_def_rsa;
+                engine_def_rsa = e; break;
+        case ENGINE_TYPE_DSA:
+                old = engine_def_dsa;
+                engine_def_dsa = e; break;
+        case ENGINE_TYPE_DH:
+                old = engine_def_dh;
+                engine_def_dh = e; break;
+        case ENGINE_TYPE_RAND:
+                old = engine_def_rand;
+                engine_def_rand = e; break;
+        case ENGINE_TYPE_BN_MOD_EXP:
+                old = engine_def_bn_mod_exp;
+                engine_def_bn_mod_exp = e; break;
+        case ENGINE_TYPE_BN_MOD_EXP_CRT:
+                old = engine_def_bn_mod_exp_crt;
+                engine_def_bn_mod_exp_crt = e; break;
+                }
+        CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
+        /* If we've replaced a previous value, then we need to remove the
+         * functional reference we had. */
+        if(old && !ENGINE_finish(old))
+                {
+                ENGINEerr(ENGINE_F_ENGINE_SET_DEFAULT_TYPE,
+                        ENGINE_R_FINISH_FAILED);
+                return 0;
+                }
+        return 1;
+        }
+
+int ENGINE_set_default_RSA(ENGINE *e)
+        {
+        return engine_set_default_type(ENGINE_TYPE_RSA, e);
+        }
+
+int ENGINE_set_default_DSA(ENGINE *e)
+        {
+        return engine_set_default_type(ENGINE_TYPE_DSA, e);
+        }
+
+int ENGINE_set_default_DH(ENGINE *e)
+        {
+        return engine_set_default_type(ENGINE_TYPE_DH, e);
+        }
+
+int ENGINE_set_default_RAND(ENGINE *e)
+        {
+        return engine_set_default_type(ENGINE_TYPE_RAND, e);
+        }
+
+int ENGINE_set_default_BN_mod_exp(ENGINE *e)
+        {
+        return engine_set_default_type(ENGINE_TYPE_BN_MOD_EXP, e);
+        }
+
+int ENGINE_set_default_BN_mod_exp_crt(ENGINE *e)
+        {
+        return engine_set_default_type(ENGINE_TYPE_BN_MOD_EXP_CRT, e);
+        }
+
+int ENGINE_set_default(ENGINE *e, unsigned int flags)
+        {
+        if((flags & ENGINE_METHOD_RSA) && e->rsa_meth &&
+                        !ENGINE_set_default_RSA(e))
+                return 0;
+        if((flags & ENGINE_METHOD_DSA) && e->dsa_meth &&
+                        !ENGINE_set_default_DSA(e))
+                return 0;
+        if((flags & ENGINE_METHOD_DH) && e->dh_meth &&
+                        !ENGINE_set_default_DH(e))
+                return 0;
+        if((flags & ENGINE_METHOD_RAND) && e->rand_meth &&
+                        !ENGINE_set_default_RAND(e))
+                return 0;
+        if((flags & ENGINE_METHOD_BN_MOD_EXP) && e->bn_mod_exp &&
+                        !ENGINE_set_default_BN_mod_exp(e))
+                return 0;
+        if((flags & ENGINE_METHOD_BN_MOD_EXP_CRT) && e->bn_mod_exp_crt &&
+                        !ENGINE_set_default_BN_mod_exp_crt(e))
+                return 0;
+        return 1;
+        }
+