cbecb3ac37
mechanism to the ENGINE framework. This means there there are going to be new functionality for the DSO part, and ultimately some way of merging two file specifications together. This commit places the merging code into the repository. It's currently not used anywhere, and hasn't been tested at all. It may be full of errors, including syntactical ones. Those will be fixed as promptly as possible.
467 lines
11 KiB
C
467 lines
11 KiB
C
/* dso_lib.c -*- mode:C; c-file-style: "eay" -*- */
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/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
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* project 2000.
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*/
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/* ====================================================================
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* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include <openssl/crypto.h>
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#include "cryptlib.h"
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#include <openssl/dso.h>
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static DSO_METHOD *default_DSO_meth = NULL;
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DSO *DSO_new(void)
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{
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return(DSO_new_method(NULL));
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}
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void DSO_set_default_method(DSO_METHOD *meth)
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{
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default_DSO_meth = meth;
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}
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DSO_METHOD *DSO_get_default_method(void)
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{
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return(default_DSO_meth);
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}
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DSO_METHOD *DSO_get_method(DSO *dso)
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{
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return(dso->meth);
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}
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DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth)
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{
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DSO_METHOD *mtmp;
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mtmp = dso->meth;
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dso->meth = meth;
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return(mtmp);
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}
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DSO *DSO_new_method(DSO_METHOD *meth)
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{
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DSO *ret;
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if(default_DSO_meth == NULL)
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/* We default to DSO_METH_openssl() which in turn defaults
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* to stealing the "best available" method. Will fallback
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* to DSO_METH_null() in the worst case. */
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default_DSO_meth = DSO_METHOD_openssl();
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ret = (DSO *)OPENSSL_malloc(sizeof(DSO));
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if(ret == NULL)
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{
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DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
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return(NULL);
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}
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memset(ret, 0, sizeof(DSO));
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ret->meth_data = sk_new_null();
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if(ret->meth_data == NULL)
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{
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/* sk_new doesn't generate any errors so we do */
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DSOerr(DSO_F_DSO_NEW_METHOD,ERR_R_MALLOC_FAILURE);
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OPENSSL_free(ret);
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return(NULL);
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}
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if(meth == NULL)
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ret->meth = default_DSO_meth;
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else
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ret->meth = meth;
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ret->references = 1;
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if((ret->meth->init != NULL) && !ret->meth->init(ret))
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{
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OPENSSL_free(ret);
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ret=NULL;
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}
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return(ret);
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}
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int DSO_free(DSO *dso)
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{
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int i;
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if(dso == NULL)
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{
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DSOerr(DSO_F_DSO_FREE,ERR_R_PASSED_NULL_PARAMETER);
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return(0);
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}
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i=CRYPTO_add(&dso->references,-1,CRYPTO_LOCK_DSO);
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#ifdef REF_PRINT
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REF_PRINT("DSO",dso);
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#endif
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if(i > 0) return(1);
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#ifdef REF_CHECK
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if(i < 0)
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{
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fprintf(stderr,"DSO_free, bad reference count\n");
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abort();
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}
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#endif
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if((dso->meth->dso_unload != NULL) && !dso->meth->dso_unload(dso))
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{
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DSOerr(DSO_F_DSO_FREE,DSO_R_UNLOAD_FAILED);
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return(0);
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}
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if((dso->meth->finish != NULL) && !dso->meth->finish(dso))
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{
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DSOerr(DSO_F_DSO_FREE,DSO_R_FINISH_FAILED);
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return(0);
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}
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sk_free(dso->meth_data);
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if(dso->filename != NULL)
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OPENSSL_free(dso->filename);
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if(dso->loaded_filename != NULL)
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OPENSSL_free(dso->loaded_filename);
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OPENSSL_free(dso);
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return(1);
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}
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int DSO_flags(DSO *dso)
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{
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return((dso == NULL) ? 0 : dso->flags);
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}
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int DSO_up_ref(DSO *dso)
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{
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if (dso == NULL)
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{
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DSOerr(DSO_F_DSO_UP_REF,ERR_R_PASSED_NULL_PARAMETER);
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return(0);
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}
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CRYPTO_add(&dso->references,1,CRYPTO_LOCK_DSO);
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return(1);
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}
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DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags)
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{
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DSO *ret;
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int allocated = 0;
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if(dso == NULL)
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{
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ret = DSO_new_method(meth);
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if(ret == NULL)
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{
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DSOerr(DSO_F_DSO_LOAD,ERR_R_MALLOC_FAILURE);
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goto err;
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}
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allocated = 1;
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/* Pass the provided flags to the new DSO object */
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if(DSO_ctrl(ret, DSO_CTRL_SET_FLAGS, flags, NULL) < 0)
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{
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DSOerr(DSO_F_DSO_LOAD,DSO_R_CTRL_FAILED);
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goto err;
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}
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}
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else
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ret = dso;
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/* Don't load if we're currently already loaded */
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if(ret->filename != NULL)
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{
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DSOerr(DSO_F_DSO_LOAD,DSO_R_DSO_ALREADY_LOADED);
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goto err;
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}
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/* filename can only be NULL if we were passed a dso that already has
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* one set. */
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if(filename != NULL)
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if(!DSO_set_filename(ret, filename))
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{
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DSOerr(DSO_F_DSO_LOAD,DSO_R_SET_FILENAME_FAILED);
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goto err;
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}
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filename = ret->filename;
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if(filename == NULL)
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{
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DSOerr(DSO_F_DSO_LOAD,DSO_R_NO_FILENAME);
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goto err;
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}
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if(ret->meth->dso_load == NULL)
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{
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DSOerr(DSO_F_DSO_LOAD,DSO_R_UNSUPPORTED);
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goto err;
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}
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if(!ret->meth->dso_load(ret))
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{
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DSOerr(DSO_F_DSO_LOAD,DSO_R_LOAD_FAILED);
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goto err;
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}
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/* Load succeeded */
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return(ret);
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err:
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if(allocated)
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DSO_free(ret);
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return(NULL);
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}
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void *DSO_bind_var(DSO *dso, const char *symname)
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{
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void *ret = NULL;
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if((dso == NULL) || (symname == NULL))
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{
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DSOerr(DSO_F_DSO_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
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return(NULL);
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}
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if(dso->meth->dso_bind_var == NULL)
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{
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DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_UNSUPPORTED);
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return(NULL);
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}
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if((ret = dso->meth->dso_bind_var(dso, symname)) == NULL)
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{
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DSOerr(DSO_F_DSO_BIND_VAR,DSO_R_SYM_FAILURE);
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return(NULL);
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}
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/* Success */
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return(ret);
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}
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DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const char *symname)
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{
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DSO_FUNC_TYPE ret = NULL;
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if((dso == NULL) || (symname == NULL))
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{
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DSOerr(DSO_F_DSO_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
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return(NULL);
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}
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if(dso->meth->dso_bind_func == NULL)
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{
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DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_UNSUPPORTED);
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return(NULL);
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}
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if((ret = dso->meth->dso_bind_func(dso, symname)) == NULL)
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{
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DSOerr(DSO_F_DSO_BIND_FUNC,DSO_R_SYM_FAILURE);
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return(NULL);
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}
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/* Success */
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return(ret);
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}
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/* I don't really like these *_ctrl functions very much to be perfectly
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* honest. For one thing, I think I have to return a negative value for
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* any error because possible DSO_ctrl() commands may return values
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* such as "size"s that can legitimately be zero (making the standard
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* "if(DSO_cmd(...))" form that works almost everywhere else fail at
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* odd times. I'd prefer "output" values to be passed by reference and
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* the return value as success/failure like usual ... but we conform
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* when we must... :-) */
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long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg)
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{
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if(dso == NULL)
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{
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DSOerr(DSO_F_DSO_CTRL,ERR_R_PASSED_NULL_PARAMETER);
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return(-1);
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}
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/* We should intercept certain generic commands and only pass control
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* to the method-specific ctrl() function if it's something we don't
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* handle. */
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switch(cmd)
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{
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case DSO_CTRL_GET_FLAGS:
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return dso->flags;
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case DSO_CTRL_SET_FLAGS:
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dso->flags = (int)larg;
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return(0);
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case DSO_CTRL_OR_FLAGS:
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dso->flags |= (int)larg;
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return(0);
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default:
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break;
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}
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if((dso->meth == NULL) || (dso->meth->dso_ctrl == NULL))
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{
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DSOerr(DSO_F_DSO_CTRL,DSO_R_UNSUPPORTED);
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return(-1);
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}
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return(dso->meth->dso_ctrl(dso,cmd,larg,parg));
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}
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int DSO_set_name_converter(DSO *dso, DSO_NAME_CONVERTER_FUNC cb,
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DSO_NAME_CONVERTER_FUNC *oldcb)
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{
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if(dso == NULL)
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{
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DSOerr(DSO_F_DSO_SET_NAME_CONVERTER,
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ERR_R_PASSED_NULL_PARAMETER);
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return(0);
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}
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if(oldcb)
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*oldcb = dso->name_converter;
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dso->name_converter = cb;
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return(1);
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}
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const char *DSO_get_filename(DSO *dso)
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{
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if(dso == NULL)
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{
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DSOerr(DSO_F_DSO_GET_FILENAME,ERR_R_PASSED_NULL_PARAMETER);
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return(NULL);
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}
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return(dso->filename);
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}
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int DSO_set_filename(DSO *dso, const char *filename)
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{
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char *copied;
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if((dso == NULL) || (filename == NULL))
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{
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DSOerr(DSO_F_DSO_SET_FILENAME,ERR_R_PASSED_NULL_PARAMETER);
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return(0);
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}
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if(dso->loaded_filename)
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{
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DSOerr(DSO_F_DSO_SET_FILENAME,DSO_R_DSO_ALREADY_LOADED);
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return(0);
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}
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/* We'll duplicate filename */
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copied = OPENSSL_malloc(strlen(filename) + 1);
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if(copied == NULL)
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{
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DSOerr(DSO_F_DSO_SET_FILENAME,ERR_R_MALLOC_FAILURE);
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return(0);
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}
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strcpy(copied, filename);
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if(dso->filename)
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OPENSSL_free(dso->filename);
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dso->filename = copied;
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return(1);
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}
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char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2)
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{
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char *result = NULL;
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if(dso == NULL || dir == NULL)
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{
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DSOerr(DSO_F_DSO_MERGE,ERR_R_PASSED_NULL_PARAMETER);
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return(NULL);
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}
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if(filespec1 == NULL)
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filespec1 = dso->filename;
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if(filespec1 == NULL)
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{
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DSOerr(DSO_F_DSO_MERGE,DSO_R_NO_FILENAME);
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return(NULL);
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}
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if((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0)
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{
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if(dso->merger != NULL)
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result = dso->merger(dso, filespec1, filespec2);
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else if(dso->meth->dso_merger != NULL)
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result = dso->meth->dso_merger(dso,
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filespec1, filespec2);
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}
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return(result);
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}
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char *DSO_convert_filename(DSO *dso, const char *filename)
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{
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char *result = NULL;
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if(dso == NULL)
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{
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DSOerr(DSO_F_DSO_CONVERT_FILENAME,ERR_R_PASSED_NULL_PARAMETER);
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return(NULL);
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}
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if(filename == NULL)
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filename = dso->filename;
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if(filename == NULL)
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{
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DSOerr(DSO_F_DSO_CONVERT_FILENAME,DSO_R_NO_FILENAME);
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return(NULL);
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}
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if((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0)
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{
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if(dso->name_converter != NULL)
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result = dso->name_converter(dso, filename);
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else if(dso->meth->dso_name_converter != NULL)
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result = dso->meth->dso_name_converter(dso, filename);
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}
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if(result == NULL)
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{
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result = OPENSSL_malloc(strlen(filename) + 1);
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if(result == NULL)
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{
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DSOerr(DSO_F_DSO_CONVERT_FILENAME,
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ERR_R_MALLOC_FAILURE);
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return(NULL);
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}
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strcpy(result, filename);
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}
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return(result);
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}
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const char *DSO_get_loaded_filename(DSO *dso)
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{
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if(dso == NULL)
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{
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DSOerr(DSO_F_DSO_GET_LOADED_FILENAME,
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ERR_R_PASSED_NULL_PARAMETER);
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return(NULL);
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}
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return(dso->loaded_filename);
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}
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