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Diffstat (limited to 'source4/heimdal/lib/des/engine.c')
| -rw-r--r-- | source4/heimdal/lib/des/engine.c | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/source4/heimdal/lib/des/engine.c b/source4/heimdal/lib/des/engine.c new file mode 100644 index 0000000000..b72339c362 --- /dev/null +++ b/source4/heimdal/lib/des/engine.c @@ -0,0 +1,345 @@ +/* + * Copyright (c) 2006 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * 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. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS 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 INSTITUTE OR 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. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +RCSID("$Id: engine.c,v 1.11 2006/10/19 14:23:00 lha Exp $"); + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <engine.h> + +#ifdef HAVE_DLFCN_H +#include <dlfcn.h> +#ifndef RTLD_NOW +#define RTLD_NOW 0 +#endif +#endif + +struct hc_engine { + int references; + char *name; + char *id; + void (*destroy)(ENGINE *); + const RSA_METHOD *rsa; + const DH_METHOD *dh; + const RAND_METHOD *rand; +}; + +int +ENGINE_finish(ENGINE *engine) +{ + if (engine->references-- <= 0) + abort(); + if (engine->references > 0) + return 1; + + if (engine->name) + free(engine->name); + if (engine->id) + free(engine->id); + if(engine->destroy) + (*engine->destroy)(engine); + + memset(engine, 0, sizeof(engine)); + engine->references = -1; + + + free(engine); + return 1; +} + +int +ENGINE_up_ref(ENGINE *engine) +{ + if (engine->references < 0) + abort(); + engine->references++; + return 1; +} + +int +ENGINE_set_id(ENGINE *engine, const char *id) +{ + engine->id = strdup(id); + return (engine->id == NULL) ? 0 : 1; +} + +int +ENGINE_set_name(ENGINE *engine, const char *name) +{ + engine->name = strdup(name); + return (engine->name == NULL) ? 0 : 1; +} + +int +ENGINE_set_RSA(ENGINE *engine, const RSA_METHOD *method) +{ + engine->rsa = method; + return 1; +} + +int +ENGINE_set_DH(ENGINE *engine, const DH_METHOD *method) +{ + engine->dh = method; + return 1; +} + +int +ENGINE_set_destroy_function(ENGINE *e, void (*destroy)(ENGINE *)) +{ + e->destroy = destroy; + return 1; +} + +const char * +ENGINE_get_id(const ENGINE *engine) +{ + return engine->id; +} + +const char * +ENGINE_get_name(const ENGINE *engine) +{ + return engine->name; +} + +const RSA_METHOD * +ENGINE_get_RSA(const ENGINE *engine) +{ + return engine->rsa; +} + +const DH_METHOD * +ENGINE_get_DH(const ENGINE *engine) +{ + return engine->dh; +} + +const RAND_METHOD * +ENGINE_get_RAND(const ENGINE *engine) +{ + return engine->rand; +} + +/* + * + */ + +#define SG_default_engine(type) \ +static ENGINE *type##_engine; \ +int \ +ENGINE_set_default_##type(ENGINE *engine) \ +{ \ + if (type##_engine) \ + ENGINE_finish(type##_engine); \ + type##_engine = engine; \ + if (type##_engine) \ + ENGINE_up_ref(type##_engine); \ + return 1; \ +} \ +ENGINE * \ +ENGINE_get_default_##type(void) \ +{ \ + if (type##_engine) \ + ENGINE_up_ref(type##_engine); \ + return type##_engine; \ +} + +SG_default_engine(RSA) +SG_default_engine(DH) + +#undef SG_default_engine + +/* + * + */ + +static ENGINE **engines; +static unsigned int num_engines; + +static int +add_engine(ENGINE *engine) +{ + ENGINE **d, *dup; + + dup = ENGINE_by_id(engine->id); + if (dup) { + ENGINE_finish(dup); + return 0; + } + + d = realloc(engines, (num_engines + 1) * sizeof(*engines)); + if (d == NULL) + return 1; + engines = d; + engines[num_engines++] = engine; + + return 1; +} + +void +ENGINE_load_builtin_engines(void) +{ + ENGINE *engine; + int ret; + + engine = calloc(1, sizeof(*engine)); + if (engine == NULL) + return; + + ENGINE_set_id(engine, "builtin"); + ENGINE_set_name(engine, + "Heimdal crypto builtin engine version " PACKAGE_VERSION); + ENGINE_set_RSA(engine, RSA_imath_method()); + ENGINE_set_DH(engine, DH_imath_method()); + + ret = add_engine(engine); + if (ret != 1) + ENGINE_finish(engine); +} + +ENGINE * +ENGINE_by_dso(const char *path, const char *id) +{ +#ifdef HAVE_DLOPEN + ENGINE *engine; + void *handle; + int ret; + + engine = calloc(1, sizeof(*engine)); + if (engine == NULL) + return NULL; + + handle = dlopen(path, RTLD_NOW); + if (handle == NULL) { + /* printf("error: %s\n", dlerror()); */ + free(engine); + return NULL; + } + + { + unsigned long version; + openssl_v_check v_check; + + v_check = (openssl_v_check)dlsym(handle, "v_check"); + if (v_check == NULL) { + dlclose(handle); + free(engine); + return NULL; + } + + version = (*v_check)(OPENSSL_DYNAMIC_VERSION); + if (version == 0) { + dlclose(handle); + free(engine); + return NULL; + } + } + + { + openssl_bind_engine bind_engine; + + bind_engine = (openssl_bind_engine)dlsym(handle, "bind_engine"); + if (bind_engine == NULL) { + dlclose(handle); + free(engine); + return NULL; + } + + ret = (*bind_engine)(engine, id, NULL); /* XXX fix third arg */ + if (ret != 1) { + dlclose(handle); + free(engine); + return NULL; + } + } + + ENGINE_up_ref(engine); + + ret = add_engine(engine); + if (ret != 1) { + dlclose(handle); + ENGINE_finish(engine); + return NULL; + } + + return engine; +#else + return NULL; +#endif +} + +ENGINE * +ENGINE_by_id(const char *id) +{ + int i; + + for (i = 0; i < num_engines; i++) { + if (strcmp(id, engines[i]->id) == 0) { + ENGINE_up_ref(engines[i]); + return engines[i]; + } + } + return NULL; +} + +void +ENGINE_add_conf_module(void) +{ + ENGINE *engine; + + /* + * XXX Parse configuration file instead + */ + + engine = ENGINE_by_dso("/usr/heimdal/lib/hc-modules/hc-gmp.so", NULL); + if (engine == NULL) + return; + { + const RSA_METHOD *method = ENGINE_get_RSA(engine); + if (method) + RSA_set_default_method(method); + } + { + const DH_METHOD *method = ENGINE_get_DH(engine); + if (method) + DH_set_default_method(method); + } + +} |