crypto/openssl-0.9/crypto/txt_db/txt_db.c

   1 /* crypto/txt_db/txt_db.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62 #include "cryptlib.h"
  63 #include <openssl/buffer.h>
  64 #include <openssl/txt_db.h>
  65
  66 #undef BUFSIZE
  67 #define BUFSIZE 512
  68
  69 const char TXT_DB_version[]="TXT_DB" OPENSSL_VERSION_PTEXT;
  70
  71 TXT_DB *TXT_DB_read(BIO *in, int num)
  72         {
  73         TXT_DB *ret=NULL;
  74         int er=1;
  75         int esc=0;
  76         long ln=0;
  77         int i,add,n;
  78         int size=BUFSIZE;
  79         int offset=0;
  80         char *p,**pp,*f;
  81         BUF_MEM *buf=NULL;
  82
  83         if ((buf=BUF_MEM_new()) == NULL) goto err;
  84         if (!BUF_MEM_grow(buf,size)) goto err;
  85
  86         if ((ret=(TXT_DB *)OPENSSL_malloc(sizeof(TXT_DB))) == NULL)
  87                 goto err;
  88         ret->num_fields=num;
  89         ret->index=NULL;
  90         ret->qual=NULL;
  91         if ((ret->data=sk_new_null()) == NULL)
  92                 goto err;
  93         if ((ret->index=(LHASH **)OPENSSL_malloc(sizeof(LHASH *)*num)) == NULL)
  94                 goto err;
  95         if ((ret->qual=(int (**)(char **))OPENSSL_malloc(sizeof(int (**)(char **))*num)) == NULL)
  96                 goto err;
  97         for (i=0; i<num; i++)
  98                 {
  99                 ret->index[i]=NULL;
 100                 ret->qual[i]=NULL;
 101                 }
 102
 103         add=(num+1)*sizeof(char *);
 104         buf->data[size-1]='\0';
 105         offset=0;
 106         for (;;)
 107                 {
 108                 if (offset != 0)
 109                         {
 110                         size+=BUFSIZE;
 111                         if (!BUF_MEM_grow_clean(buf,size)) goto err;
 112                         }
 113                 buf->data[offset]='\0';
 114                 BIO_gets(in,&(buf->data[offset]),size-offset);
 115                 ln++;
 116                 if (buf->data[offset] == '\0') break;
 117                 if ((offset == 0) && (buf->data[0] == '#')) continue;
 118                 i=strlen(&(buf->data[offset]));
 119                 offset+=i;
 120                 if (buf->data[offset-1] != '\n')
 121                         continue;
 122                 else
 123                         {
 124                         buf->data[offset-1]='\0'; /* blat the '\n' */
 125                         if (!(p=(char *)OPENSSL_malloc(add+offset))) goto err;
 126                         offset=0;
 127                         }
 128                 pp=(char **)p;
 129                 p+=add;
 130                 n=0;
 131                 pp[n++]=p;
 132                 i=0;
 133                 f=buf->data;
 134
 135                 esc=0;
 136                 for (;;)
 137                         {
 138                         if (*f == '\0') break;
 139                         if (*f == '\t')
 140                                 {
 141                                 if (esc)
 142                                         p--;
 143                                 else
 144                                         {
 145                                         *(p++)='\0';
 146                                         f++;
 147                                         if (n >=  num) break;
 148                                         pp[n++]=p;
 149                                         continue;
 150                                         }
 151                                 }
 152                         esc=(*f == '\\');
 153                         *(p++)= *(f++);
 154                         }
 155                 *(p++)='\0';
 156                 if ((n != num) || (*f != '\0'))
 157                         {
 158 #if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16)   /* temporaty fix :-( */
 159                         fprintf(stderr,"wrong number of fields on line %ld (looking for field %d, got %d, '%s' left)\n",ln,num,n,f);
 160 #endif
 161                         er=2;
 162                         goto err;
 163                         }
 164                 pp[n]=p;
 165                 if (!sk_push(ret->data,(char *)pp))
 166                         {
 167 #if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16)   /* temporaty fix :-( */
 168                         fprintf(stderr,"failure in sk_push\n");
 169 #endif
 170                         er=2;
 171                         goto err;
 172                         }
 173                 }
 174         er=0;
 175 err:
 176         BUF_MEM_free(buf);
 177         if (er)
 178                 {
 179 #if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16)
 180                 if (er == 1) fprintf(stderr,"OPENSSL_malloc failure\n");
 181 #endif
 182                 if (ret != NULL)
 183                         {
 184                         if (ret->data != NULL) sk_free(ret->data);
 185                         if (ret->index != NULL) OPENSSL_free(ret->index);
 186                         if (ret->qual != NULL) OPENSSL_free(ret->qual);
 187                         if (ret != NULL) OPENSSL_free(ret);
 188                         }
 189                 return(NULL);
 190                 }
 191         else
 192                 return(ret);
 193         }
 194
 195 char **TXT_DB_get_by_index(TXT_DB *db, int idx, char **value)
 196         {
 197         char **ret;
 198         LHASH *lh;
 199
 200         if (idx >= db->num_fields)
 201                 {
 202                 db->error=DB_ERROR_INDEX_OUT_OF_RANGE;
 203                 return(NULL);
 204                 }
 205         lh=db->index[idx];
 206         if (lh == NULL)
 207                 {
 208                 db->error=DB_ERROR_NO_INDEX;
 209                 return(NULL);
 210                 }
 211         ret=(char **)lh_retrieve(lh,value);
 212         db->error=DB_ERROR_OK;
 213         return(ret);
 214         }
 215
 216 int TXT_DB_create_index(TXT_DB *db, int field, int (*qual)(char **),
 217                 LHASH_HASH_FN_TYPE hash, LHASH_COMP_FN_TYPE cmp)
 218         {
 219         LHASH *idx;
 220         char **r;
 221         int i,n;
 222
 223         if (field >= db->num_fields)
 224                 {
 225                 db->error=DB_ERROR_INDEX_OUT_OF_RANGE;
 226                 return(0);
 227                 }
 228         if ((idx=lh_new(hash,cmp)) == NULL)
 229                 {
 230                 db->error=DB_ERROR_MALLOC;
 231                 return(0);
 232                 }
 233         n=sk_num(db->data);
 234         for (i=0; i<n; i++)
 235                 {
 236                 r=(char **)sk_value(db->data,i);
 237                 if ((qual != NULL) && (qual(r) == 0)) continue;
 238                 if ((r=lh_insert(idx,r)) != NULL)
 239                         {
 240                         db->error=DB_ERROR_INDEX_CLASH;
 241                         db->arg1=sk_find(db->data,(char *)r);
 242                         db->arg2=i;
 243                         lh_free(idx);
 244                         return(0);
 245                         }
 246                 }
 247         if (db->index[field] != NULL) lh_free(db->index[field]);
 248         db->index[field]=idx;
 249         db->qual[field]=qual;
 250         return(1);
 251         }
 252
 253 long TXT_DB_write(BIO *out, TXT_DB *db)
 254         {
 255         long i,j,n,nn,l,tot=0;
 256         char *p,**pp,*f;
 257         BUF_MEM *buf=NULL;
 258         long ret= -1;
 259
 260         if ((buf=BUF_MEM_new()) == NULL)
 261                 goto err;
 262         n=sk_num(db->data);
 263         nn=db->num_fields;
 264         for (i=0; i<n; i++)
 265                 {
 266                 pp=(char **)sk_value(db->data,i);
 267
 268                 l=0;
 269                 for (j=0; j<nn; j++)
 270                         {
 271                         if (pp[j] != NULL)
 272                                 l+=strlen(pp[j]);
 273                         }
 274                 if (!BUF_MEM_grow_clean(buf,(int)(l*2+nn))) goto err;
 275
 276                 p=buf->data;
 277                 for (j=0; j<nn; j++)
 278                         {
 279                         f=pp[j];
 280                         if (f != NULL)
 281                                 for (;;)
 282                                         {
 283                                         if (*f == '\0') break;
 284                                         if (*f == '\t') *(p++)='\\';
 285                                         *(p++)= *(f++);
 286                                         }
 287                         *(p++)='\t';
 288                         }
 289                 p[-1]='\n';
 290                 j=p-buf->data;
 291                 if (BIO_write(out,buf->data,(int)j) != j)
 292                         goto err;
 293                 tot+=j;
 294                 }
 295         ret=tot;
 296 err:
 297         if (buf != NULL) BUF_MEM_free(buf);
 298         return(ret);
 299         }
 300
 301 int TXT_DB_insert(TXT_DB *db, char **row)
 302         {
 303         int i;
 304         char **r;
 305
 306         for (i=0; i<db->num_fields; i++)
 307                 {
 308                 if (db->index[i] != NULL)
 309                         {
 310                         if ((db->qual[i] != NULL) &&
 311                                 (db->qual[i](row) == 0)) continue;
 312                         r=(char **)lh_retrieve(db->index[i],row);
 313                         if (r != NULL)
 314                                 {
 315                                 db->error=DB_ERROR_INDEX_CLASH;
 316                                 db->arg1=i;
 317                                 db->arg_row=r;
 318                                 goto err;
 319                                 }
 320                         }
 321                 }
 322         /* We have passed the index checks, now just append and insert */
 323         if (!sk_push(db->data,(char *)row))
 324                 {
 325                 db->error=DB_ERROR_MALLOC;
 326                 goto err;
 327                 }
 328
 329         for (i=0; i<db->num_fields; i++)
 330                 {
 331                 if (db->index[i] != NULL)
 332                         {
 333                         if ((db->qual[i] != NULL) &&
 334                                 (db->qual[i](row) == 0)) continue;
 335                         lh_insert(db->index[i],row);
 336                         }
 337                 }
 338         return(1);
 339 err:
 340         return(0);
 341         }
 342
 343 void TXT_DB_free(TXT_DB *db)
 344         {
 345         int i,n;
 346         char **p,*max;
 347
 348         if(db == NULL)
 349             return;
 350
 351         if (db->index != NULL)
 352                 {
 353                 for (i=db->num_fields-1; i>=0; i--)
 354                         if (db->index[i] != NULL) lh_free(db->index[i]);
 355                 OPENSSL_free(db->index);
 356                 }
 357         if (db->qual != NULL)
 358                 OPENSSL_free(db->qual);
 359         if (db->data != NULL)
 360                 {
 361                 for (i=sk_num(db->data)-1; i>=0; i--)
 362                         {
 363                         /* check if any 'fields' have been allocated
 364                          * from outside of the initial block */
 365                         p=(char **)sk_value(db->data,i);
 366                         max=p[db->num_fields]; /* last address */
 367                         if (max == NULL) /* new row */
 368                                 {
 369                                 for (n=0; n<db->num_fields; n++)
 370                                         if (p[n] != NULL) OPENSSL_free(p[n]);
 371                                 }
 372                         else
 373                                 {
 374                                 for (n=0; n<db->num_fields; n++)
 375                                         {
 376                                         if (((p[n] < (char *)p) || (p[n] > max))
 377                                                 && (p[n] != NULL))
 378                                                 OPENSSL_free(p[n]);
 379                                         }
 380                                 }
 381                         OPENSSL_free(sk_value(db->data,i));
 382                         }
 383                 sk_free(db->data);
 384                 }
 385         OPENSSL_free(db);
 386         }