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/* |
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* Copyright (C) 1998,1999,2001 Nikos Mavroyanopoulos |
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* |
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* This library is free software; you can redistribute it and/or modify it under the terms of the |
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* GNU Library General Public License as published by the Free Software |
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* Foundation; either version 2 of the License, or (at your option) any |
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* later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public |
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* License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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* Boston, MA 02111-1307, USA. |
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*/ |
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|
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/* $Id: mcrypt_extra.c,v 1.25 2002/12/16 09:50:50 nmav Exp $ */ |
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|
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#include <libdefs.h> |
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#include <bzero.h> |
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#include <xmemory.h> |
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#include <mcrypt_internal.h> |
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|
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int mcrypt_algorithm_module_ok(const char *file, const char *directory); |
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int mcrypt_mode_module_ok(const char *file, const char *directory); |
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|
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void *mcrypt_dlopen(mcrypt_dlhandle * handle, const char *a_directory, |
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const char *m_directory, const char *filename); |
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|
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#ifdef HAVE_READDIR_R |
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# define MAXPATHLEN 256 |
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#endif |
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|
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WIN32DLL_DEFINE char *mcrypt_readdir(DIR * dirstream) |
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{ |
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|
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char *result; |
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struct dirent *ret = NULL; |
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#ifdef HAVE_READDIR_R |
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struct dirent ret2[sizeof(struct dirent) + MAXPATHLEN]; |
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#endif |
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|
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#ifdef HAVE_READDIR_R |
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readdir_r(dirstream, ret2, &ret); |
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#else |
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ret = readdir(dirstream); |
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#endif |
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if (ret == NULL) |
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return NULL; |
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|
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result = strdup(ret->d_name); |
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if (result == NULL) { |
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return NULL; |
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} |
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|
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return result; |
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|
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} |
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|
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extern const mcrypt_preloaded mps[]; |
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|
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WIN32DLL_DEFINE char **mcrypt_list_algorithms(const char *libdir, |
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int *size) |
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{ |
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DIR *pdir; |
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char directory[512]; |
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char *dirname; |
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char **filename = NULL, *ptr; |
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int tmpsize, i = 0; |
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|
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|
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*size = 0; |
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|
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while (mps[i].name != 0 || mps[i].address != 0) { |
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if (mps[i].name != NULL && mps[i].address == NULL) { |
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if (mcrypt_algorithm_module_ok(mps[i].name, NULL) > |
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0) { |
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filename = |
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realloc(filename, |
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((*size) + |
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1) * sizeof(char *)); |
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if (filename == NULL) { |
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goto freeall; |
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} |
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filename[*size] = strdup(mps[i].name); |
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if (filename[*size] == NULL) |
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goto freeall; |
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(*size)++; |
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} |
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} |
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i++; |
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} |
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|
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#ifdef USE_LTDL |
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|
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if (libdir == NULL) { |
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strncpy(directory, LIBDIR, sizeof(directory)-1); |
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} else { |
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strncpy(directory, libdir, sizeof(directory)-1); |
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} |
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directory[ sizeof(directory)-1] = 0; |
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|
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pdir = opendir(directory); |
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if (pdir == NULL) { |
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#ifdef DEBUG |
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fprintf(stderr, "Unable to open directory %s.\n", |
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directory); |
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#endif |
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return filename; |
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} |
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|
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for (;;) { |
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dirname = mcrypt_readdir(pdir); |
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if (dirname != NULL) { |
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tmpsize = strlen(dirname); |
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if (tmpsize > 3) { |
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|
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if (mcrypt_algorithm_module_ok |
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(dirname, directory) > 0) { |
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ptr = strrchr(dirname, '.'); |
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if (ptr != NULL) { |
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*ptr = '\0'; |
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tmpsize = strlen(dirname); |
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} |
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|
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if (_mcrypt_search_symlist_lib |
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(dirname) != NULL) { |
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free(dirname); |
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continue; /* it's already in the list, |
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* since it's included in the lib. |
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*/ |
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} |
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|
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filename = |
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realloc(filename, |
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(*size + |
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1) * sizeof(char *)); |
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if (filename == NULL) { |
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free(dirname); |
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goto freeall; |
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} |
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|
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filename[*size] = strdup(dirname); |
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if (filename[*size] == NULL) { |
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free(dirname); |
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goto freeall; |
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} |
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(*size)++; |
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} |
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} |
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free(dirname); |
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} else break; |
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} |
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|
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|
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closedir(pdir); |
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|
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#endif |
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|
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return filename; |
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|
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freeall: |
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for (i = 0; i < (*size); i++) { |
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free(filename[i]); |
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} |
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free(filename); |
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return NULL; |
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} |
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|
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WIN32DLL_DEFINE char **mcrypt_list_modes(const char *libdir, int *size) |
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{ |
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DIR *pdir; |
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char directory[512]; |
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char *dirname; |
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char **filename = NULL, *ptr; |
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int tmpsize; |
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int i = 0; |
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|
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*size = 0; |
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|
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while (mps[i].name != 0 || mps[i].address != 0) { |
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if (mps[i].name != NULL && mps[i].address == NULL) { |
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if (mcrypt_mode_module_ok(mps[i].name, NULL) > 0) { |
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filename = |
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realloc(filename, |
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(*size + 1) * sizeof(char *)); |
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if (filename == NULL) { |
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goto freeall; |
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} |
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filename[*size] = strdup(mps[i].name); |
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if (filename[*size] == NULL) |
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goto freeall; |
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(*size)++; |
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} |
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} |
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i++; |
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} |
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|
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#ifdef USE_LTDL |
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|
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if (libdir == NULL) { |
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strncpy(directory, LIBDIR, sizeof(directory)-1); |
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} else { |
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strncpy(directory, libdir, sizeof(directory)-1); |
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} |
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directory[ sizeof(directory)-1] = 0; |
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|
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pdir = opendir(directory); |
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if (pdir == NULL) { |
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#ifdef DEBUG |
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fprintf(stderr, "Unable to open directory %s.\n", |
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directory); |
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#endif |
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return filename; |
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} |
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|
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for (;;) { |
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|
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dirname = mcrypt_readdir(pdir); |
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if (dirname != NULL) { |
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tmpsize = strlen(dirname); |
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if (tmpsize > 3) { |
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if (mcrypt_mode_module_ok |
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(dirname, directory) > 0) { |
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|
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ptr = strrchr(dirname, '.'); |
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if (ptr != NULL) { |
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*ptr = '\0'; |
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tmpsize = strlen(dirname); |
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} |
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if (_mcrypt_search_symlist_lib |
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(dirname) != NULL) { |
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free(dirname); |
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continue; /* it's already in the list, |
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* since it's included in the lib. |
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*/ |
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} |
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filename = |
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realloc(filename, |
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(*size + |
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1) * sizeof(char *)); |
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if (filename == NULL) { |
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free(dirname); |
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goto freeall; |
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} |
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|
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filename[*size] = strdup(dirname); |
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if (filename[*size] == NULL) { |
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free(dirname); |
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goto freeall; |
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} |
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(*size)++; |
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} |
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} |
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free(dirname); |
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} else { |
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break; |
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} |
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|
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} |
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|
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closedir(pdir); |
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#endif |
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|
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return filename; |
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|
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freeall: |
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for (i = 0; i < (*size); i++) { |
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free(filename[i]); |
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} |
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free(filename); |
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return NULL; |
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} |
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|
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WIN32DLL_DEFINE void mcrypt_free_p(char **p, int size) |
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{ |
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int i; |
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|
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for (i = 0; i < size; i++) { |
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free(p[i]); |
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} |
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free(p); |
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} |
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|
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WIN32DLL_DEFINE |
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int mcrypt_algorithm_module_ok(const char *file, const char *directory) |
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{ |
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word32 ret = 1; |
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mcrypt_dlhandle _handle; |
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void *rr; |
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int (*_version) (void); |
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|
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if (file == NULL && directory == NULL) { |
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return MCRYPT_UNKNOWN_ERROR; |
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} |
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|
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if (lt_dlinit() != 0) { |
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return MCRYPT_UNKNOWN_ERROR; |
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} |
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|
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rr = mcrypt_dlopen(&_handle, directory, NULL, file); |
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|
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if (!rr) { |
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lt_dlexit(); |
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return MCRYPT_UNKNOWN_ERROR; |
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} |
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|
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|
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_version = mcrypt_dlsym(_handle, "_mcrypt_algorithm_version"); |
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|
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if (_version == NULL) { |
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mcrypt_dlclose(_handle); |
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lt_dlexit(); |
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return MCRYPT_UNKNOWN_ERROR; |
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} |
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|
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ret = _version(); |
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|
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mcrypt_dlclose(_handle); |
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|
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lt_dlexit(); |
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|
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return ret; |
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|
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} |
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|
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WIN32DLL_DEFINE |
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int mcrypt_mode_module_ok(const char *file, const char *directory) |
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{ |
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word32 ret; |
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mcrypt_dlhandle _handle; |
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void *rr; |
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int (*_version) (void); |
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|
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if (file == NULL && directory == NULL) { |
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return MCRYPT_UNKNOWN_ERROR; |
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} |
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|
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if (lt_dlinit() != 0) { |
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return MCRYPT_UNKNOWN_ERROR; |
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} |
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|
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rr = mcrypt_dlopen(&_handle, directory, NULL, file); |
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if (!rr) { |
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lt_dlexit(); |
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return MCRYPT_UNKNOWN_ERROR; |
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} |
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|
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|
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_version = mcrypt_dlsym(_handle, "_mcrypt_mode_version"); |
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|
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if (_version == NULL) { |
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mcrypt_dlclose(_handle); |
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lt_dlexit(); |
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return MCRYPT_UNKNOWN_ERROR; |
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} |
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|
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ret = _version(); |
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|
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mcrypt_dlclose(_handle); |
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lt_dlexit(); |
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|
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return ret; |
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|
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} |
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|
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/* Taken from libgcrypt */ |
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|
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static const char *parse_version_number(const char *s, int *number) |
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{ |
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int val = 0; |
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|
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if (*s == '0' && isdigit(s[1])) |
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return NULL; /* leading zeros are not allowed */ |
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for (; isdigit(*s); s++) { |
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val *= 10; |
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val += *s - '0'; |
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} |
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*number = val; |
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return val < 0 ? NULL : s; |
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} |
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|
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|
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static const char *parse_version_string(const char *s, int *major, |
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int *minor, int *micro) |
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{ |
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s = parse_version_number(s, major); |
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if (!s || *s != '.') |
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return NULL; |
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s++; |
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s = parse_version_number(s, minor); |
| 395 |
if (!s || *s != '.') |
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return NULL; |
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s++; |
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s = parse_version_number(s, micro); |
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if (!s) |
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return NULL; |
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return s; /* patchlevel */ |
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} |
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|
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/**************** |
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* Check that the the version of the library is at minimum the requested one |
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* and return the version string; return NULL if the condition is not |
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* satisfied. If a NULL is passed to this function, no check is done, |
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* but the version string is simply returned. |
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*/ |
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const char *mcrypt_check_version(const char *req_version) |
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{ |
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const char *ver = VERSION; |
| 413 |
int my_major, my_minor, my_micro; |
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int rq_major, rq_minor, rq_micro; |
| 415 |
const char *my_plvl, *rq_plvl; |
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|
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if (!req_version) |
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return ver; |
| 419 |
|
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my_plvl = |
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parse_version_string(ver, &my_major, &my_minor, &my_micro); |
| 422 |
if (!my_plvl) |
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return NULL; /* very strange our own version is bogus */ |
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rq_plvl = parse_version_string(req_version, &rq_major, &rq_minor, |
| 425 |
&rq_micro); |
| 426 |
if (!rq_plvl) |
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return NULL; /* req version string is invalid */ |
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|
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if (my_major > rq_major |
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|| (my_major == rq_major && my_minor > rq_minor) |
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|| (my_major == rq_major && my_minor == rq_minor |
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&& my_micro > rq_micro) |
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|| (my_major == rq_major && my_minor == rq_minor |
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&& my_micro == rq_micro |
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&& strcmp(my_plvl, rq_plvl) >= 0)) { |
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return ver; |
| 437 |
} |
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return NULL; |
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} |
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