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447 lines
13 KiB
447 lines
13 KiB
/* dso_lib.c */ |
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/* |
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* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project |
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* 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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/* |
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* We default to DSO_METH_openssl() which in turn defaults to |
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* stealing the "best available" method. Will fallback to |
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* DSO_METH_null() in the worst case. |
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*/ |
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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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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_void_new_null(); |
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if (ret->meth_data == NULL) { |
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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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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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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) |
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return (1); |
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#ifdef REF_CHECK |
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if (i < 0) { |
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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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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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DSOerr(DSO_F_DSO_FREE, DSO_R_FINISH_FAILED); |
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return (0); |
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} |
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sk_void_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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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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ret = DSO_new_method(meth); |
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if (ret == NULL) { |
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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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DSOerr(DSO_F_DSO_LOAD, DSO_R_CTRL_FAILED); |
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goto err; |
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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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DSOerr(DSO_F_DSO_LOAD, DSO_R_DSO_ALREADY_LOADED); |
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goto err; |
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} |
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/* |
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* filename can only be NULL if we were passed a dso that already has one |
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* set. |
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*/ |
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if (filename != NULL) |
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if (!DSO_set_filename(ret, filename)) { |
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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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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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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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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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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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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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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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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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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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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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/* |
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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 any |
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* error because possible DSO_ctrl() commands may return values such as |
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* "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 odd |
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* times. I'd prefer "output" values to be passed by reference and the return |
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* value as success/failure like usual ... but we conform when we must... :-) |
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*/ |
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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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DSOerr(DSO_F_DSO_CTRL, ERR_R_PASSED_NULL_PARAMETER); |
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return (-1); |
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} |
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/* |
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* We should intercept certain generic commands and only pass control to |
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* the method-specific ctrl() function if it's something we don't handle. |
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*/ |
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switch (cmd) { |
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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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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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DSOerr(DSO_F_DSO_SET_NAME_CONVERTER, 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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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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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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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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DSOerr(DSO_F_DSO_SET_FILENAME, ERR_R_MALLOC_FAILURE); |
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return (0); |
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} |
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BUF_strlcpy(copied, filename, strlen(filename) + 1); |
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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 || filespec1 == NULL) { |
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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 ((dso->flags & DSO_FLAG_NO_NAME_TRANSLATION) == 0) { |
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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, 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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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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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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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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result = OPENSSL_malloc(strlen(filename) + 1); |
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if (result == NULL) { |
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DSOerr(DSO_F_DSO_CONVERT_FILENAME, ERR_R_MALLOC_FAILURE); |
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return (NULL); |
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} |
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BUF_strlcpy(result, filename, strlen(filename) + 1); |
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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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DSOerr(DSO_F_DSO_GET_LOADED_FILENAME, 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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int DSO_pathbyaddr(void *addr, char *path, int sz) |
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{ |
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DSO_METHOD *meth = default_DSO_meth; |
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if (meth == NULL) |
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meth = DSO_METHOD_openssl(); |
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if (meth->pathbyaddr == NULL) { |
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DSOerr(DSO_F_DSO_PATHBYADDR, DSO_R_UNSUPPORTED); |
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return -1; |
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} |
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return (*meth->pathbyaddr) (addr, path, sz); |
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} |
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void *DSO_global_lookup(const char *name) |
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{ |
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DSO_METHOD *meth = default_DSO_meth; |
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if (meth == NULL) |
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meth = DSO_METHOD_openssl(); |
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if (meth->globallookup == NULL) { |
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DSOerr(DSO_F_DSO_GLOBAL_LOOKUP, DSO_R_UNSUPPORTED); |
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return NULL; |
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} |
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return (*meth->globallookup) (name); |
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}
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