-/* crypto/engine/engine_dyn.c */
+/* crypto/engine/eng_dyn.c */
/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
- * project 2000.
+ * project 2001.
*/
/* ====================================================================
- * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
+ * 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
*/
-#include <stdio.h>
-#include <openssl/crypto.h>
-#include "cryptlib.h"
#include "eng_int.h"
-#include <openssl/engine.h>
#include <openssl/dso.h>
/* Shared libraries implementing ENGINEs for use by the "dynamic" ENGINE loader
/* 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)());
+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 */
#define DYNAMIC_CMD_SO_PATH ENGINE_CMD_BASE
#define DYNAMIC_CMD_NO_VCHECK (ENGINE_CMD_BASE + 1)
-#define DYNAMIC_CMD_ENGINE_ID (ENGINE_CMD_BASE + 2)
+#define DYNAMIC_CMD_ID (ENGINE_CMD_BASE + 2)
#define DYNAMIC_CMD_LIST_ADD (ENGINE_CMD_BASE + 3)
-#define DYNAMIC_CMD_LOAD (ENGINE_CMD_BASE + 4)
+#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";
"NO_VCHECK",
"Specifies to continue even if version checking fails (boolean)",
ENGINE_CMD_FLAG_NUMERIC},
- {DYNAMIC_CMD_ENGINE_ID,
- "ENGINE_ID",
+ {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
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
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);
}
}
{
dynamic_data_ctx *c;
c = OPENSSL_malloc(sizeof(dynamic_data_ctx));
- if(!ctx)
+ if(!c)
{
- ENGINEerr(ENGINE_F_SET_DATA_CTX,ERR_R_MALLOC_FAILURE);
+ ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX,ERR_R_MALLOC_FAILURE);
return 0;
}
memset(c, 0, sizeof(dynamic_data_ctx));
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)
return ctx;
}
-/* As this is only ever called once, there's no need for locking
- * (indeed - the lock will already be held by our caller!!!) */
-ENGINE *ENGINE_dynamic(void)
+static ENGINE *engine_dynamic(void)
{
ENGINE *ret = ENGINE_new();
if(!ret)
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
return 0;
}
-static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
+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;
/* a NULL 'p' or a string of zero-length is the same thing */
if(p && (strlen((const char *)p) < 1))
p = NULL;
- ctx->DYNAMIC_LIBNAME = (const char *)p;
- return 1;
+ 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_ENGINE_ID:
+ 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;
- ctx->engine_id = (const char *)p;
- return 1;
+ 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))
{
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;
}
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);
+ 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_LIBNAME || ((ctx->dynamic_dso = DSO_load(NULL,
- ctx->DYNAMIC_LIBNAME, NULL, 0)) == NULL))
+ 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 */
* 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.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))
{
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