3a87a9b9db
changes are the fallout). As this could break source code that doesn't directly include headers for interfaces it uses, changes to recursive includes are covered by the OPENSSL_NO_DEPRECATED symbol. It's better to define this when building and using openssl, and then adapt code where necessary - this is how to stay current. However the mechanism exists for the lethargic.
363 lines
12 KiB
C
363 lines
12 KiB
C
/* ====================================================================
|
|
* Copyright (c) 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 "cryptlib.h"
|
|
#include <openssl/evp.h>
|
|
#include <openssl/lhash.h>
|
|
#include "eng_int.h"
|
|
|
|
/* This is the type of item in the 'implementation' table. Each 'nid' hashes to
|
|
* a (potentially NULL) ENGINE_PILE structure which contains a stack of ENGINE*
|
|
* pointers. These pointers aren't references, because they're inserted and
|
|
* removed during ENGINE creation and ENGINE destruction. They point to ENGINEs
|
|
* that *exist* (ie. have a structural reference count greater than zero) rather
|
|
* than ENGINEs that are *functional*. Each pointer in those stacks are to
|
|
* ENGINEs that implements the algorithm corresponding to each 'nid'. */
|
|
|
|
/* The type of the items in the table */
|
|
typedef struct st_engine_pile
|
|
{
|
|
/* The 'nid' of the algorithm/mode this ENGINE_PILE structure represents
|
|
* */
|
|
int nid;
|
|
/* A stack of ENGINE pointers for ENGINEs that support this
|
|
* algorithm/mode. In the event that 'funct' is NULL, the first entry in
|
|
* this stack that initialises will be set as 'funct' and assumed as the
|
|
* default for operations of this type. */
|
|
STACK_OF(ENGINE) *sk;
|
|
/* The default ENGINE to perform this algorithm/mode. */
|
|
ENGINE *funct;
|
|
/* This value optimises engine_table_select(). If it is called it sets
|
|
* this value to 1. Any changes to this ENGINE_PILE resets it to zero.
|
|
* As such, no ENGINE_init() thrashing is done unless ENGINEs
|
|
* continually register (and/or unregister). */
|
|
int uptodate;
|
|
} ENGINE_PILE;
|
|
|
|
/* The type of the hash table of ENGINE_PILE structures such that each are
|
|
* unique and keyed by the 'nid' value. */
|
|
struct st_engine_table
|
|
{
|
|
LHASH piles;
|
|
}; /* ENGINE_TABLE */
|
|
|
|
/* This value stores global options controlling behaviour of (mostly) the
|
|
* engine_table_select() function. It's a bitmask of flag values of the form
|
|
* ENGINE_TABLE_FLAG_*** (as defined in engine.h) and is controlled by the
|
|
* ENGINE_[get|set]_table_flags() function. */
|
|
static unsigned int table_flags = 0;
|
|
|
|
/* API function manipulating 'table_flags' */
|
|
unsigned int ENGINE_get_table_flags(void)
|
|
{
|
|
return table_flags;
|
|
}
|
|
void ENGINE_set_table_flags(unsigned int flags)
|
|
{
|
|
table_flags = flags;
|
|
}
|
|
|
|
/* Internal functions for the "piles" hash table */
|
|
static unsigned long engine_pile_hash(const ENGINE_PILE *c)
|
|
{
|
|
return c->nid;
|
|
}
|
|
static int engine_pile_cmp(const ENGINE_PILE *a, const ENGINE_PILE *b)
|
|
{
|
|
return a->nid - b->nid;
|
|
}
|
|
static IMPLEMENT_LHASH_HASH_FN(engine_pile_hash, const ENGINE_PILE *)
|
|
static IMPLEMENT_LHASH_COMP_FN(engine_pile_cmp, const ENGINE_PILE *)
|
|
static int int_table_check(ENGINE_TABLE **t, int create)
|
|
{
|
|
LHASH *lh;
|
|
if(*t)
|
|
return 1;
|
|
if(!create)
|
|
return 0;
|
|
if((lh = lh_new(LHASH_HASH_FN(engine_pile_hash),
|
|
LHASH_COMP_FN(engine_pile_cmp))) == NULL)
|
|
return 0;
|
|
*t = (ENGINE_TABLE *)lh;
|
|
return 1;
|
|
}
|
|
|
|
/* Privately exposed (via eng_int.h) functions for adding and/or removing
|
|
* ENGINEs from the implementation table */
|
|
int engine_table_register(ENGINE_TABLE **table, ENGINE_CLEANUP_CB *cleanup,
|
|
ENGINE *e, const int *nids, int num_nids, int setdefault)
|
|
{
|
|
int ret = 0, added = 0;
|
|
ENGINE_PILE tmplate, *fnd;
|
|
CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
|
|
if(!(*table))
|
|
added = 1;
|
|
if(!int_table_check(table, 1))
|
|
goto end;
|
|
if(added)
|
|
/* The cleanup callback needs to be added */
|
|
engine_cleanup_add_first(cleanup);
|
|
while(num_nids--)
|
|
{
|
|
tmplate.nid = *nids;
|
|
fnd = lh_retrieve(&(*table)->piles, &tmplate);
|
|
if(!fnd)
|
|
{
|
|
fnd = OPENSSL_malloc(sizeof(ENGINE_PILE));
|
|
if(!fnd)
|
|
goto end;
|
|
fnd->uptodate = 1;
|
|
fnd->nid = *nids;
|
|
fnd->sk = sk_ENGINE_new_null();
|
|
if(!fnd->sk)
|
|
{
|
|
OPENSSL_free(fnd);
|
|
goto end;
|
|
}
|
|
fnd->funct= NULL;
|
|
lh_insert(&(*table)->piles, fnd);
|
|
}
|
|
/* A registration shouldn't add duplciate entries */
|
|
sk_ENGINE_delete_ptr(fnd->sk, e);
|
|
/* if 'setdefault', this ENGINE goes to the head of the list */
|
|
if(!sk_ENGINE_push(fnd->sk, e))
|
|
goto end;
|
|
/* "touch" this ENGINE_PILE */
|
|
fnd->uptodate = 0;
|
|
if(setdefault)
|
|
{
|
|
if(!engine_unlocked_init(e))
|
|
{
|
|
ENGINEerr(ENGINE_F_ENGINE_TABLE_REGISTER,
|
|
ENGINE_R_INIT_FAILED);
|
|
goto end;
|
|
}
|
|
if(fnd->funct)
|
|
engine_unlocked_finish(fnd->funct, 0);
|
|
fnd->funct = e;
|
|
}
|
|
nids++;
|
|
}
|
|
ret = 1;
|
|
end:
|
|
CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
|
|
return ret;
|
|
}
|
|
static void int_unregister_cb(ENGINE_PILE *pile, ENGINE *e)
|
|
{
|
|
int n;
|
|
/* Iterate the 'c->sk' stack removing any occurance of 'e' */
|
|
while((n = sk_ENGINE_find(pile->sk, e)) >= 0)
|
|
{
|
|
sk_ENGINE_delete(pile->sk, n);
|
|
/* "touch" this ENGINE_CIPHER */
|
|
pile->uptodate = 0;
|
|
}
|
|
if(pile->funct == e)
|
|
{
|
|
engine_unlocked_finish(e, 0);
|
|
pile->funct = NULL;
|
|
}
|
|
}
|
|
static IMPLEMENT_LHASH_DOALL_ARG_FN(int_unregister_cb,ENGINE_PILE *,ENGINE *)
|
|
void engine_table_unregister(ENGINE_TABLE **table, ENGINE *e)
|
|
{
|
|
CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
|
|
if(int_table_check(table, 0))
|
|
lh_doall_arg(&(*table)->piles,
|
|
LHASH_DOALL_ARG_FN(int_unregister_cb), e);
|
|
CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
|
|
}
|
|
|
|
static void int_cleanup_cb(ENGINE_PILE *p)
|
|
{
|
|
sk_ENGINE_free(p->sk);
|
|
if(p->funct)
|
|
engine_unlocked_finish(p->funct, 0);
|
|
OPENSSL_free(p);
|
|
}
|
|
static IMPLEMENT_LHASH_DOALL_FN(int_cleanup_cb,ENGINE_PILE *)
|
|
void engine_table_cleanup(ENGINE_TABLE **table)
|
|
{
|
|
CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
|
|
if(*table)
|
|
{
|
|
lh_doall(&(*table)->piles, LHASH_DOALL_FN(int_cleanup_cb));
|
|
lh_free(&(*table)->piles);
|
|
*table = NULL;
|
|
}
|
|
CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
|
|
}
|
|
|
|
/* Exposed API function to get a functional reference from the implementation
|
|
* table (ie. try to get a functional reference from the tabled structural
|
|
* references) for a given cipher 'nid' */
|
|
#ifndef ENGINE_TABLE_DEBUG
|
|
ENGINE *engine_table_select(ENGINE_TABLE **table, int nid)
|
|
#else
|
|
ENGINE *engine_table_select_tmp(ENGINE_TABLE **table, int nid, const char *f, int l)
|
|
#endif
|
|
{
|
|
ENGINE *ret = NULL;
|
|
ENGINE_PILE tmplate, *fnd=NULL;
|
|
int initres, loop = 0;
|
|
|
|
/* If 'engine_ciphers' is NULL, then it's absolutely *sure* that no
|
|
* ENGINEs have registered any implementations! */
|
|
if(!(*table))
|
|
{
|
|
#ifdef ENGINE_TABLE_DEBUG
|
|
fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, no "
|
|
"registered for anything!\n", f, l, nid);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
CRYPTO_w_lock(CRYPTO_LOCK_ENGINE);
|
|
/* Check again inside the lock otherwise we could race against cleanup
|
|
* operations. But don't worry about a fprintf(stderr). */
|
|
if(!int_table_check(table, 0))
|
|
goto end;
|
|
tmplate.nid = nid;
|
|
fnd = lh_retrieve(&(*table)->piles, &tmplate);
|
|
if(!fnd)
|
|
goto end;
|
|
if(fnd->funct && engine_unlocked_init(fnd->funct))
|
|
{
|
|
#ifdef ENGINE_TABLE_DEBUG
|
|
fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, using "
|
|
"ENGINE '%s' cached\n", f, l, nid, fnd->funct->id);
|
|
#endif
|
|
ret = fnd->funct;
|
|
goto end;
|
|
}
|
|
if(fnd->uptodate)
|
|
{
|
|
ret = fnd->funct;
|
|
goto end;
|
|
}
|
|
trynext:
|
|
ret = sk_ENGINE_value(fnd->sk, loop++);
|
|
if(!ret)
|
|
{
|
|
#ifdef ENGINE_TABLE_DEBUG
|
|
fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, no "
|
|
"registered implementations would initialise\n",
|
|
f, l, nid);
|
|
#endif
|
|
goto end;
|
|
}
|
|
#if 0
|
|
/* Don't need to get a reference if we hold the lock. If the locking has
|
|
* to change in future, that would be different ... */
|
|
ret->struct_ref++; engine_ref_debug(ret, 0, 1)
|
|
#endif
|
|
/* Try and initialise the ENGINE if it's already functional *or* if the
|
|
* ENGINE_TABLE_FLAG_NOINIT flag is not set. */
|
|
if((ret->funct_ref > 0) || !(table_flags & ENGINE_TABLE_FLAG_NOINIT))
|
|
initres = engine_unlocked_init(ret);
|
|
else
|
|
initres = 0;
|
|
#if 0
|
|
/* Release the structural reference */
|
|
ret->struct_ref--; engine_ref_debug(ret, 0, -1);
|
|
#endif
|
|
if(initres)
|
|
{
|
|
/* If we didn't have a default (functional reference) for this
|
|
* 'nid' (or we had one but for whatever reason we're now
|
|
* initialising a different one), use this opportunity to set
|
|
* 'funct'. */
|
|
if((fnd->funct != ret) && engine_unlocked_init(ret))
|
|
{
|
|
/* If there was a previous default we release it. */
|
|
if(fnd->funct)
|
|
engine_unlocked_finish(fnd->funct, 0);
|
|
/* We got an extra functional reference for the
|
|
* per-'nid' default */
|
|
fnd->funct = ret;
|
|
#ifdef ENGINE_TABLE_DEBUG
|
|
fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, "
|
|
"setting default to '%s'\n", f, l, nid, ret->id);
|
|
#endif
|
|
}
|
|
#ifdef ENGINE_TABLE_DEBUG
|
|
fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, using "
|
|
"newly initialised '%s'\n", f, l, nid, ret->id);
|
|
#endif
|
|
goto end;
|
|
}
|
|
goto trynext;
|
|
end:
|
|
/* Whatever happened - we should "untouch" our uptodate file seeing as
|
|
* we have tried our best to find a functional reference for 'nid'. If
|
|
* it failed, it is unlikely to succeed again until some future
|
|
* registrations (or unregistrations) have taken place that affect that
|
|
* 'nid'. */
|
|
if(fnd)
|
|
fnd->uptodate = 1;
|
|
#ifdef ENGINE_TABLE_DEBUG
|
|
if(ret)
|
|
fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, caching "
|
|
"ENGINE '%s'\n", f, l, nid, ret->id);
|
|
else
|
|
fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, caching "
|
|
"'no matching ENGINE'\n", f, l, nid);
|
|
#endif
|
|
CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE);
|
|
/* Whatever happened, any failed init()s are not failures in this
|
|
* context, so clear our error state. */
|
|
ERR_clear_error();
|
|
return ret;
|
|
}
|