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/* |
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* Copyright (C) 1998,1999 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 1.14 2001/09/02 20:11:45 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, const char *m_directory, |
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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 DT_REG |
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do { |
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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) return NULL; |
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|
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result = calloc(1, strlen(ret->d_name) + 1); |
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if (result == NULL) { |
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return NULL; |
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} |
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strcpy(result, ret->d_name); |
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#ifdef DT_REG |
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} |
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while ((ret->d_type != DT_REG) && (ret->d_type != DT_UNKNOWN) |
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&& (ret != NULL)); |
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#endif |
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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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extern char* strdup(char*); |
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|
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WIN32DLL_DEFINE char **mcrypt_list_algorithms(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, 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) > 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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return NULL; |
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} |
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filename[*size] = strdup( mps[i].name); |
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if (filename[*size]==NULL) return NULL; |
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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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if (libdir == NULL) { |
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strcpy(directory, LIBDIR); |
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} else { |
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strcpy(directory, libdir); |
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} |
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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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free( filename); |
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return NULL; |
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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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if (mcrypt_algorithm_module_ok |
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(dirname, directory) > 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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free(dirname); |
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return NULL; |
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} |
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filename[*size] = |
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calloc(1, tmpsize + 1); |
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if (filename[*size]==NULL) return NULL; |
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strcpy(filename[*size], dirname); |
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|
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ptr = |
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strrchr(filename[*size], '.'); |
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if (ptr != NULL) |
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*ptr = '\0'; |
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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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|
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closedir(pdir); |
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|
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return filename; |
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|
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} |
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|
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WIN32DLL_DEFINE char **mcrypt_list_modes(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 + |
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1) * sizeof(char *)); |
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if (filename==NULL) { |
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return NULL; |
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} |
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filename[*size] = strdup( mps[i].name); |
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if (filename[*size]==NULL) return NULL; |
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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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if (libdir == NULL) { |
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strcpy(directory, LIBDIR); |
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} else { |
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strcpy(directory, libdir); |
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} |
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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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free(filename); |
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return NULL; |
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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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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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return NULL; |
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} |
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filename[*size] = |
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calloc(1, tmpsize + 1); |
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if (filename[*size]==NULL) return NULL; |
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|
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strcpy(filename[*size], dirname); |
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ptr = |
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strrchr(filename[*size], '.'); |
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if (ptr != NULL) |
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*ptr = '\0'; |
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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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return filename; |
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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; |
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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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|
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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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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* |
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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 * |
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parse_version_string( const char *s, int *major, 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 ); |
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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, 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 * |
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mcrypt_check_version( const char *req_version ) |
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{ |
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const char *ver = VERSION; |
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int my_major, my_minor, my_micro; |
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int rq_major, rq_minor, rq_micro; |
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const char *my_plvl, *rq_plvl; |
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|
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if ( !req_version ) |
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return ver; |
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|
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my_plvl = parse_version_string( ver, &my_major, &my_minor, &my_micro ); |
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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, |
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&rq_micro ); |
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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; |
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} |
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return NULL; |
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} |
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