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-rw-r--r--app/openssl/crypto/engine/eng_dyn.c551
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diff --git a/app/openssl/crypto/engine/eng_dyn.c b/app/openssl/crypto/engine/eng_dyn.c
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--- a/app/openssl/crypto/engine/eng_dyn.c
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-/* crypto/engine/eng_dyn.c */
-/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
- * project 2001.
- */
-/* ====================================================================
- * 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 "eng_int.h"
-#include <openssl/dso.h>
-
-/* Shared libraries implementing ENGINEs for use by the "dynamic" ENGINE loader
- * should implement the hook-up functions with the following prototypes. */
-
-/* Our ENGINE handlers */
-static int dynamic_init(ENGINE *e);
-static int dynamic_finish(ENGINE *e);
-static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
-/* Predeclare our context type */
-typedef struct st_dynamic_data_ctx dynamic_data_ctx;
-/* The implementation for the important control command */
-static int dynamic_load(ENGINE *e, dynamic_data_ctx *ctx);
-
-#define DYNAMIC_CMD_SO_PATH ENGINE_CMD_BASE
-#define DYNAMIC_CMD_NO_VCHECK (ENGINE_CMD_BASE + 1)
-#define DYNAMIC_CMD_ID (ENGINE_CMD_BASE + 2)
-#define DYNAMIC_CMD_LIST_ADD (ENGINE_CMD_BASE + 3)
-#define DYNAMIC_CMD_DIR_LOAD (ENGINE_CMD_BASE + 4)
-#define DYNAMIC_CMD_DIR_ADD (ENGINE_CMD_BASE + 5)
-#define DYNAMIC_CMD_LOAD (ENGINE_CMD_BASE + 6)
-
-/* The constants used when creating the ENGINE */
-static const char *engine_dynamic_id = "dynamic";
-static const char *engine_dynamic_name = "Dynamic engine loading support";
-static const ENGINE_CMD_DEFN dynamic_cmd_defns[] = {
- {DYNAMIC_CMD_SO_PATH,
- "SO_PATH",
- "Specifies the path to the new ENGINE shared library",
- ENGINE_CMD_FLAG_STRING},
- {DYNAMIC_CMD_NO_VCHECK,
- "NO_VCHECK",
- "Specifies to continue even if version checking fails (boolean)",
- ENGINE_CMD_FLAG_NUMERIC},
- {DYNAMIC_CMD_ID,
- "ID",
- "Specifies an ENGINE id name for loading",
- ENGINE_CMD_FLAG_STRING},
- {DYNAMIC_CMD_LIST_ADD,
- "LIST_ADD",
- "Whether to add a loaded ENGINE to the internal list (0=no,1=yes,2=mandatory)",
- ENGINE_CMD_FLAG_NUMERIC},
- {DYNAMIC_CMD_DIR_LOAD,
- "DIR_LOAD",
- "Specifies whether to load from 'DIR_ADD' directories (0=no,1=yes,2=mandatory)",
- ENGINE_CMD_FLAG_NUMERIC},
- {DYNAMIC_CMD_DIR_ADD,
- "DIR_ADD",
- "Adds a directory from which ENGINEs can be loaded",
- ENGINE_CMD_FLAG_STRING},
- {DYNAMIC_CMD_LOAD,
- "LOAD",
- "Load up the ENGINE specified by other settings",
- ENGINE_CMD_FLAG_NO_INPUT},
- {0, NULL, NULL, 0}
- };
-static const ENGINE_CMD_DEFN dynamic_cmd_defns_empty[] = {
- {0, NULL, NULL, 0}
- };
-
-/* Loading code stores state inside the ENGINE structure via the "ex_data"
- * element. We load all our state into a single structure and use that as a
- * single context in the "ex_data" stack. */
-struct st_dynamic_data_ctx
- {
- /* The DSO object we load that supplies the ENGINE code */
- DSO *dynamic_dso;
- /* The function pointer to the version checking shared library function */
- dynamic_v_check_fn v_check;
- /* The function pointer to the engine-binding shared library function */
- dynamic_bind_engine bind_engine;
- /* The default name/path for loading the shared library */
- const char *DYNAMIC_LIBNAME;
- /* Whether to continue loading on a version check failure */
- int no_vcheck;
- /* If non-NULL, stipulates the 'id' of the ENGINE to be loaded */
- const char *engine_id;
- /* If non-zero, a successfully loaded ENGINE should be added to the internal
- * ENGINE list. If 2, the add must succeed or the entire load should fail. */
- int list_add_value;
- /* The symbol name for the version checking function */
- const char *DYNAMIC_F1;
- /* The symbol name for the "initialise ENGINE structure" function */
- const char *DYNAMIC_F2;
- /* Whether to never use 'dirs', use 'dirs' as a fallback, or only use
- * 'dirs' for loading. Default is to use 'dirs' as a fallback. */
- int dir_load;
- /* A stack of directories from which ENGINEs could be loaded */
- STACK_OF(OPENSSL_STRING) *dirs;
- };
-
-/* This is the "ex_data" index we obtain and reserve for use with our context
- * structure. */
-static int dynamic_ex_data_idx = -1;
-
-static void int_free_str(char *s) { OPENSSL_free(s); }
-/* Because our ex_data element may or may not get allocated depending on whether
- * a "first-use" occurs before the ENGINE is freed, we have a memory leak
- * problem to solve. We can't declare a "new" handler for the ex_data as we
- * don't want a dynamic_data_ctx in *all* ENGINE structures of all types (this
- * is a bug in the design of CRYPTO_EX_DATA). As such, we just declare a "free"
- * handler and that will get called if an ENGINE is being destroyed and there
- * was an ex_data element corresponding to our context type. */
-static void dynamic_data_ctx_free_func(void *parent, void *ptr,
- CRYPTO_EX_DATA *ad, int idx, long argl, void *argp)
- {
- if(ptr)
- {
- dynamic_data_ctx *ctx = (dynamic_data_ctx *)ptr;
- if(ctx->dynamic_dso)
- DSO_free(ctx->dynamic_dso);
- if(ctx->DYNAMIC_LIBNAME)
- OPENSSL_free((void*)ctx->DYNAMIC_LIBNAME);
- if(ctx->engine_id)
- OPENSSL_free((void*)ctx->engine_id);
- if(ctx->dirs)
- sk_OPENSSL_STRING_pop_free(ctx->dirs, int_free_str);
- OPENSSL_free(ctx);
- }
- }
-
-/* Construct the per-ENGINE context. We create it blindly and then use a lock to
- * check for a race - if so, all but one of the threads "racing" will have
- * wasted their time. The alternative involves creating everything inside the
- * lock which is far worse. */
-static int dynamic_set_data_ctx(ENGINE *e, dynamic_data_ctx **ctx)
- {
- dynamic_data_ctx *c;
- c = OPENSSL_malloc(sizeof(dynamic_data_ctx));
- if(!c)
- {
- ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX,ERR_R_MALLOC_FAILURE);
- return 0;
- }
- memset(c, 0, sizeof(dynamic_data_ctx));
- c->dynamic_dso = NULL;
- c->v_check = NULL;
- c->bind_engine = NULL;
- c->DYNAMIC_LIBNAME = NULL;
- c->no_vcheck = 0;
- c->engine_id = NULL;
- c->list_add_value = 0;
- c->DYNAMIC_F1 = "v_check";
- c->DYNAMIC_F2 = "bind_engine";
- c->dir_load = 1;
- c->dirs = sk_OPENSSL_STRING_new_null();
- if(!c->dirs)
- {
- ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX,ERR_R_MALLOC_FAILURE);
- OPENSSL_free(c);
- return 0;
- }
- CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
- if((*ctx = (dynamic_data_ctx *)ENGINE_get_ex_data(e,
- dynamic_ex_data_idx)) == NULL)
- {
- /* Good, we're the first */
- ENGINE_set_ex_data(e, dynamic_ex_data_idx, c);
- *ctx = c;
- c = NULL;
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
- /* If we lost the race to set the context, c is non-NULL and *ctx is the
- * context of the thread that won. */
- if(c)
- OPENSSL_free(c);
- return 1;
- }
-
-/* This function retrieves the context structure from an ENGINE's "ex_data", or
- * if it doesn't exist yet, sets it up. */
-static dynamic_data_ctx *dynamic_get_data_ctx(ENGINE *e)
- {
- dynamic_data_ctx *ctx;
- if(dynamic_ex_data_idx < 0)
- {
- /* Create and register the ENGINE ex_data, and associate our
- * "free" function with it to ensure any allocated contexts get
- * freed when an ENGINE goes underground. */
- int new_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL,
- dynamic_data_ctx_free_func);
- if(new_idx == -1)
- {
- ENGINEerr(ENGINE_F_DYNAMIC_GET_DATA_CTX,ENGINE_R_NO_INDEX);
- return NULL;
- }
- CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
- /* Avoid a race by checking again inside this lock */
- if(dynamic_ex_data_idx < 0)
- {
- /* Good, someone didn't beat us to it */
- dynamic_ex_data_idx = new_idx;
- new_idx = -1;
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
- /* In theory we could "give back" the index here if
- * (new_idx>-1), but it's not possible and wouldn't gain us much
- * if it were. */
- }
- ctx = (dynamic_data_ctx *)ENGINE_get_ex_data(e, dynamic_ex_data_idx);
- /* Check if the context needs to be created */
- if((ctx == NULL) && !dynamic_set_data_ctx(e, &ctx))
- /* "set_data" will set errors if necessary */
- return NULL;
- return ctx;
- }
-
-static ENGINE *engine_dynamic(void)
- {
- ENGINE *ret = ENGINE_new();
- if(!ret)
- return NULL;
- if(!ENGINE_set_id(ret, engine_dynamic_id) ||
- !ENGINE_set_name(ret, engine_dynamic_name) ||
- !ENGINE_set_init_function(ret, dynamic_init) ||
- !ENGINE_set_finish_function(ret, dynamic_finish) ||
- !ENGINE_set_ctrl_function(ret, dynamic_ctrl) ||
- !ENGINE_set_flags(ret, ENGINE_FLAGS_BY_ID_COPY) ||
- !ENGINE_set_cmd_defns(ret, dynamic_cmd_defns))
- {
- ENGINE_free(ret);
- return NULL;
- }
- return ret;
- }
-
-void ENGINE_load_dynamic(void)
- {
- ENGINE *toadd = engine_dynamic();
- if(!toadd) return;
- ENGINE_add(toadd);
- /* If the "add" worked, it gets a structural reference. So either way,
- * we release our just-created reference. */
- ENGINE_free(toadd);
- /* If the "add" didn't work, it was probably a conflict because it was
- * already added (eg. someone calling ENGINE_load_blah then calling
- * ENGINE_load_builtin_engines() perhaps). */
- ERR_clear_error();
- }
-
-static int dynamic_init(ENGINE *e)
- {
- /* We always return failure - the "dyanamic" engine itself can't be used
- * for anything. */
- return 0;
- }
-
-static int dynamic_finish(ENGINE *e)
- {
- /* This should never be called on account of "dynamic_init" always
- * failing. */
- return 0;
- }
-
-static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void))
- {
- dynamic_data_ctx *ctx = dynamic_get_data_ctx(e);
- int initialised;
-
- if(!ctx)
- {
- ENGINEerr(ENGINE_F_DYNAMIC_CTRL,ENGINE_R_NOT_LOADED);
- return 0;
- }
- initialised = ((ctx->dynamic_dso == NULL) ? 0 : 1);
- /* All our control commands require the ENGINE to be uninitialised */
- if(initialised)
- {
- ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
- ENGINE_R_ALREADY_LOADED);
- return 0;
- }
- switch(cmd)
- {
- case DYNAMIC_CMD_SO_PATH:
- /* a NULL 'p' or a string of zero-length is the same thing */
- if(p && (strlen((const char *)p) < 1))
- p = NULL;
- if(ctx->DYNAMIC_LIBNAME)
- OPENSSL_free((void*)ctx->DYNAMIC_LIBNAME);
- if(p)
- ctx->DYNAMIC_LIBNAME = BUF_strdup(p);
- else
- ctx->DYNAMIC_LIBNAME = NULL;
- return (ctx->DYNAMIC_LIBNAME ? 1 : 0);
- case DYNAMIC_CMD_NO_VCHECK:
- ctx->no_vcheck = ((i == 0) ? 0 : 1);
- return 1;
- case DYNAMIC_CMD_ID:
- /* a NULL 'p' or a string of zero-length is the same thing */
- if(p && (strlen((const char *)p) < 1))
- p = NULL;
- if(ctx->engine_id)
- OPENSSL_free((void*)ctx->engine_id);
- if(p)
- ctx->engine_id = BUF_strdup(p);
- else
- ctx->engine_id = NULL;
- return (ctx->engine_id ? 1 : 0);
- case DYNAMIC_CMD_LIST_ADD:
- if((i < 0) || (i > 2))
- {
- ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
- ENGINE_R_INVALID_ARGUMENT);
- return 0;
- }
- ctx->list_add_value = (int)i;
- return 1;
- case DYNAMIC_CMD_LOAD:
- return dynamic_load(e, ctx);
- case DYNAMIC_CMD_DIR_LOAD:
- if((i < 0) || (i > 2))
- {
- ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
- ENGINE_R_INVALID_ARGUMENT);
- return 0;
- }
- ctx->dir_load = (int)i;
- return 1;
- case DYNAMIC_CMD_DIR_ADD:
- /* a NULL 'p' or a string of zero-length is the same thing */
- if(!p || (strlen((const char *)p) < 1))
- {
- ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
- ENGINE_R_INVALID_ARGUMENT);
- return 0;
- }
- {
- char *tmp_str = BUF_strdup(p);
- if(!tmp_str)
- {
- ENGINEerr(ENGINE_F_DYNAMIC_CTRL,
- ERR_R_MALLOC_FAILURE);
- return 0;
- }
- sk_OPENSSL_STRING_insert(ctx->dirs, tmp_str, -1);
- }
- return 1;
- default:
- break;
- }
- ENGINEerr(ENGINE_F_DYNAMIC_CTRL,ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED);
- return 0;
- }
-
-static int int_load(dynamic_data_ctx *ctx)
- {
- int num, loop;
- /* Unless told not to, try a direct load */
- if((ctx->dir_load != 2) && (DSO_load(ctx->dynamic_dso,
- ctx->DYNAMIC_LIBNAME, NULL, 0) != NULL))
- return 1;
- /* If we're not allowed to use 'dirs' or we have none, fail */
- if(!ctx->dir_load || (num = sk_OPENSSL_STRING_num(ctx->dirs)) < 1)
- return 0;
- for(loop = 0; loop < num; loop++)
- {
- const char *s = sk_OPENSSL_STRING_value(ctx->dirs, loop);
- char *merge = DSO_merge(ctx->dynamic_dso, ctx->DYNAMIC_LIBNAME, s);
- if(!merge)
- return 0;
- if(DSO_load(ctx->dynamic_dso, merge, NULL, 0))
- {
- /* Found what we're looking for */
- OPENSSL_free(merge);
- /* Previous failed loop iterations, if any, will have resulted in
- * errors. Clear them out before returning success. */
- ERR_clear_error();
- return 1;
- }
- OPENSSL_free(merge);
- }
- return 0;
- }
-
-static int dynamic_load(ENGINE *e, dynamic_data_ctx *ctx)
- {
- ENGINE cpy;
- dynamic_fns fns;
-
- if(!ctx->dynamic_dso)
- ctx->dynamic_dso = DSO_new();
- if(!ctx->DYNAMIC_LIBNAME)
- {
- if(!ctx->engine_id)
- return 0;
- ctx->DYNAMIC_LIBNAME =
- DSO_convert_filename(ctx->dynamic_dso, ctx->engine_id);
- }
- if(!int_load(ctx))
- {
- ENGINEerr(ENGINE_F_DYNAMIC_LOAD,
- ENGINE_R_DSO_NOT_FOUND);
- DSO_free(ctx->dynamic_dso);
- ctx->dynamic_dso = NULL;
- return 0;
- }
- /* We have to find a bind function otherwise it'll always end badly */
- if(!(ctx->bind_engine = (dynamic_bind_engine)DSO_bind_func(
- ctx->dynamic_dso, ctx->DYNAMIC_F2)))
- {
- ctx->bind_engine = NULL;
- DSO_free(ctx->dynamic_dso);
- ctx->dynamic_dso = NULL;
- ENGINEerr(ENGINE_F_DYNAMIC_LOAD,
- ENGINE_R_DSO_FAILURE);
- return 0;
- }
- /* Do we perform version checking? */
- if(!ctx->no_vcheck)
- {
- unsigned long vcheck_res = 0;
- /* Now we try to find a version checking function and decide how
- * to cope with failure if/when it fails. */
- ctx->v_check = (dynamic_v_check_fn)DSO_bind_func(
- ctx->dynamic_dso, ctx->DYNAMIC_F1);
- if(ctx->v_check)
- vcheck_res = ctx->v_check(OSSL_DYNAMIC_VERSION);
- /* We fail if the version checker veto'd the load *or* if it is
- * deferring to us (by returning its version) and we think it is
- * too old. */
- if(vcheck_res < OSSL_DYNAMIC_OLDEST)
- {
- /* Fail */
- ctx->bind_engine = NULL;
- ctx->v_check = NULL;
- DSO_free(ctx->dynamic_dso);
- ctx->dynamic_dso = NULL;
- ENGINEerr(ENGINE_F_DYNAMIC_LOAD,
- ENGINE_R_VERSION_INCOMPATIBILITY);
- return 0;
- }
- }
- /* First binary copy the ENGINE structure so that we can roll back if
- * the hand-over fails */
- memcpy(&cpy, e, sizeof(ENGINE));
- /* Provide the ERR, "ex_data", memory, and locking callbacks so the
- * loaded library uses our state rather than its own. FIXME: As noted in
- * engine.h, much of this would be simplified if each area of code
- * provided its own "summary" structure of all related callbacks. It
- * would also increase opaqueness. */
- fns.static_state = ENGINE_get_static_state();
- fns.err_fns = ERR_get_implementation();
- fns.ex_data_fns = CRYPTO_get_ex_data_implementation();
- CRYPTO_get_mem_functions(&fns.mem_fns.malloc_cb,
- &fns.mem_fns.realloc_cb,
- &fns.mem_fns.free_cb);
- fns.lock_fns.lock_locking_cb = CRYPTO_get_locking_callback();
- fns.lock_fns.lock_add_lock_cb = CRYPTO_get_add_lock_callback();
- fns.lock_fns.dynlock_create_cb = CRYPTO_get_dynlock_create_callback();
- fns.lock_fns.dynlock_lock_cb = CRYPTO_get_dynlock_lock_callback();
- fns.lock_fns.dynlock_destroy_cb = CRYPTO_get_dynlock_destroy_callback();
- /* Now that we've loaded the dynamic engine, make sure no "dynamic"
- * ENGINE elements will show through. */
- engine_set_all_null(e);
-
- /* Try to bind the ENGINE onto our own ENGINE structure */
- if(!ctx->bind_engine(e, ctx->engine_id, &fns))
- {
- ctx->bind_engine = NULL;
- ctx->v_check = NULL;
- DSO_free(ctx->dynamic_dso);
- ctx->dynamic_dso = NULL;
- ENGINEerr(ENGINE_F_DYNAMIC_LOAD,ENGINE_R_INIT_FAILED);
- /* Copy the original ENGINE structure back */
- memcpy(e, &cpy, sizeof(ENGINE));
- return 0;
- }
- /* Do we try to add this ENGINE to the internal list too? */
- if(ctx->list_add_value > 0)
- {
- if(!ENGINE_add(e))
- {
- /* Do we tolerate this or fail? */
- if(ctx->list_add_value > 1)
- {
- /* Fail - NB: By this time, it's too late to
- * rollback, and trying to do so allows the
- * bind_engine() code to have created leaks. We
- * just have to fail where we are, after the
- * ENGINE has changed. */
- ENGINEerr(ENGINE_F_DYNAMIC_LOAD,
- ENGINE_R_CONFLICTING_ENGINE_ID);
- return 0;
- }
- /* Tolerate */
- ERR_clear_error();
- }
- }
- return 1;
- }
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