lib/libcrypto/txt_db/txt_db.c

   1 /* $OpenBSD: txt_db.c,v 1.18 2014/07/11 08:44:49 jsing Exp $ */
   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
  63 #include <openssl/buffer.h>
  64 #include <openssl/txt_db.h>
  65
  66 #undef BUFSIZE
  67 #define BUFSIZE 512
  68
  69 TXT_DB *
  70 TXT_DB_read(BIO *in, int num)
  71 {
  72         TXT_DB *ret = NULL;
  73         int er = 1;
  74         int esc = 0;
  75         long ln = 0;
  76         int i, add, n;
  77         int size = BUFSIZE;
  78         int offset = 0;
  79         char *p, *f;
  80         OPENSSL_STRING *pp;
  81         BUF_MEM *buf = NULL;
  82
  83         if ((buf = BUF_MEM_new()) == NULL)
  84                 goto err;
  85         if (!BUF_MEM_grow(buf, size))
  86                 goto err;
  87
  88         if ((ret = malloc(sizeof(TXT_DB))) == NULL)
  89                 goto err;
  90         ret->num_fields = num;
  91         ret->index = NULL;
  92         ret->qual = NULL;
  93         if ((ret->data = sk_OPENSSL_PSTRING_new_null()) == NULL)
  94                 goto err;
  95         if ((ret->index = reallocarray(NULL, num, sizeof(*ret->index))) == NULL)
  96                 goto err;
  97         if ((ret->qual = reallocarray(NULL, num, sizeof(*(ret->qual)))) == NULL)
  98                 goto err;
  99         for (i = 0; i < num; i++) {
 100                 ret->index[i] = NULL;
 101                 ret->qual[i] = NULL;
 102         }
 103
 104         add = (num + 1)*sizeof(char *);
 105         buf->data[size-1] = '\0';
 106         offset = 0;
 107         for (;;) {
 108                 if (offset != 0) {
 109                         size += BUFSIZE;
 110                         if (!BUF_MEM_grow_clean(buf, size))
 111                                 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')
 117                         break;
 118                 if ((offset == 0) && (buf->data[0] == '#'))
 119                         continue;
 120                 i = strlen(&(buf->data[offset]));
 121                 offset += i;
 122                 if (buf->data[offset-1] != '\n')
 123                         continue;
 124                 else {
 125                         buf->data[offset-1] = '\0'; /* blat the '\n' */
 126                         if (!(p = malloc(add + offset)))
 127                                 goto err;
 128                         offset = 0;
 129                 }
 130                 pp = (char **)p;
 131                 p += add;
 132                 n = 0;
 133                 pp[n++] = p;
 134                 i = 0;
 135                 f = buf->data;
 136
 137                 esc = 0;
 138                 for (;;) {
 139                         if (*f == '\0')
 140                                 break;
 141                         if (*f == '\t') {
 142                                 if (esc)
 143                                         p--;
 144                                 else {
 145                                         *(p++)='\0';
 146                                         f++;
 147                                         if (n >= num)
 148                                                 break;
 149                                         pp[n++] = p;
 150                                         continue;
 151                                 }
 152                         }
 153                         esc=(*f == '\\');
 154                         *(p++)= *(f++);
 155                 }
 156                 *(p++)='\0';
 157                 if ((n != num) || (*f != '\0')) {
 158                         fprintf(stderr, "wrong number of fields on line %ld (looking for field %d, got %d, '%s' left)\n",ln,num,n,f);
 159                         er = 2;
 160                         goto err;
 161                 }
 162                 pp[n] = p;
 163                 if (!sk_OPENSSL_PSTRING_push(ret->data, pp)) {
 164                         fprintf(stderr, "failure in sk_push\n");
 165                         er = 2;
 166                         goto err;
 167                 }
 168         }
 169         er = 0;
 170
 171 err:
 172         BUF_MEM_free(buf);
 173         if (er) {
 174                 if (er == 1)
 175                         fprintf(stderr, "malloc failure\n");
 176                 if (ret != NULL) {
 177                         if (ret->data != NULL)
 178                                 sk_OPENSSL_PSTRING_free(ret->data);
 179                         free(ret->index);
 180                         free(ret->qual);
 181                         free(ret);
 182                 }
 183                 return (NULL);
 184         } else
 185                 return (ret);
 186 }
 187
 188 OPENSSL_STRING *
 189 TXT_DB_get_by_index(TXT_DB *db, int idx, OPENSSL_STRING *value)
 190 {
 191         OPENSSL_STRING *ret;
 192         LHASH_OF(OPENSSL_STRING) *lh;
 193
 194         if (idx >= db->num_fields) {
 195                 db->error = DB_ERROR_INDEX_OUT_OF_RANGE;
 196                 return (NULL);
 197         }
 198         lh = db->index[idx];
 199         if (lh == NULL) {
 200                 db->error = DB_ERROR_NO_INDEX;
 201                 return (NULL);
 202         }
 203         ret = lh_OPENSSL_STRING_retrieve(lh, value);
 204         db->error = DB_ERROR_OK;
 205         return (ret);
 206 }
 207
 208 int
 209 TXT_DB_create_index(TXT_DB *db, int field, int (*qual)(OPENSSL_STRING *),
 210     LHASH_HASH_FN_TYPE hash, LHASH_COMP_FN_TYPE cmp)
 211 {
 212         LHASH_OF(OPENSSL_STRING) *idx;
 213         OPENSSL_STRING *r;
 214         int i, n;
 215
 216         if (field >= db->num_fields) {
 217                 db->error = DB_ERROR_INDEX_OUT_OF_RANGE;
 218                 return (0);
 219         }
 220         /* FIXME: we lose type checking at this point */
 221         if ((idx = (LHASH_OF(OPENSSL_STRING) *)lh_new(hash, cmp)) == NULL) {
 222                 db->error = DB_ERROR_MALLOC;
 223                 return (0);
 224         }
 225         n = sk_OPENSSL_PSTRING_num(db->data);
 226         for (i = 0; i < n; i++) {
 227                 r = sk_OPENSSL_PSTRING_value(db->data, i);
 228                 if ((qual != NULL) && (qual(r) == 0))
 229                         continue;
 230                 if ((r = lh_OPENSSL_STRING_insert(idx, r)) != NULL) {
 231                         db->error = DB_ERROR_INDEX_CLASH;
 232                         db->arg1 = sk_OPENSSL_PSTRING_find(db->data, r);
 233                         db->arg2 = i;
 234                         lh_OPENSSL_STRING_free(idx);
 235                         return (0);
 236                 }
 237         }
 238         if (db->index[field] != NULL)
 239                 lh_OPENSSL_STRING_free(db->index[field]);
 240         db->index[field] = idx;
 241         db->qual[field] = qual;
 242         return (1);
 243 }
 244
 245 long
 246 TXT_DB_write(BIO *out, TXT_DB *db)
 247 {
 248         long i, j,n, nn, l, tot = 0;
 249         char *p, **pp, *f;
 250         BUF_MEM *buf = NULL;
 251         long ret = -1;
 252
 253         if ((buf = BUF_MEM_new()) == NULL)
 254                 goto err;
 255         n = sk_OPENSSL_PSTRING_num(db->data);
 256         nn = db->num_fields;
 257         for (i = 0; i < n; i++) {
 258                 pp = sk_OPENSSL_PSTRING_value(db->data, i);
 259
 260                 l = 0;
 261                 for (j = 0; j < nn; j++) {
 262                         if (pp[j] != NULL)
 263                                 l += strlen(pp[j]);
 264                 }
 265                 if (!BUF_MEM_grow_clean(buf, (int)(l*2 + nn)))
 266                         goto err;
 267
 268                 p = buf->data;
 269                 for (j = 0; j < nn; j++) {
 270                         f = pp[j];
 271                         if (f != NULL)
 272                                 for (;;) {
 273                                         if (*f == '\0')
 274                                                 break;
 275                                         if (*f == '\t')
 276                                                 *(p++) = '\\';
 277                                         *(p++) = *(f++);
 278                                 }
 279                         *(p++) = '\t';
 280                 }
 281                 p[-1] = '\n';
 282                 j = p - buf->data;
 283                 if (BIO_write(out, buf->data, (int)j) != j)
 284                         goto err;
 285                 tot += j;
 286         }
 287         ret = tot;
 288
 289 err:
 290         if (buf != NULL)
 291                 BUF_MEM_free(buf);
 292         return (ret);
 293 }
 294
 295 int
 296 TXT_DB_insert(TXT_DB *db, OPENSSL_STRING *row)
 297 {
 298         int i;
 299         OPENSSL_STRING *r;
 300
 301         for (i = 0; i < db->num_fields; i++) {
 302                 if (db->index[i] != NULL) {
 303                         if ((db->qual[i] != NULL) && (db->qual[i](row) == 0))
 304                                 continue;
 305                         r = lh_OPENSSL_STRING_retrieve(db->index[i], row);
 306                         if (r != NULL) {
 307                                 db->error = DB_ERROR_INDEX_CLASH;
 308                                 db->arg1 = i;
 309                                 db->arg_row = r;
 310                                 goto err;
 311                         }
 312                 }
 313         }
 314         /* We have passed the index checks, now just append and insert */
 315         if (!sk_OPENSSL_PSTRING_push(db->data, row)) {
 316                 db->error = DB_ERROR_MALLOC;
 317                 goto err;
 318         }
 319
 320         for (i = 0; i < db->num_fields; i++) {
 321                 if (db->index[i] != NULL) {
 322                         if ((db->qual[i] != NULL) && (db->qual[i](row) == 0))
 323                                 continue;
 324                         (void)lh_OPENSSL_STRING_insert(db->index[i], row);
 325                 }
 326         }
 327         return (1);
 328
 329 err:
 330         return (0);
 331 }
 332
 333 void
 334 TXT_DB_free(TXT_DB *db)
 335 {
 336         int i, n;
 337         char **p, *max;
 338
 339         if (db == NULL)
 340                 return;
 341
 342         if (db->index != NULL) {
 343                 for (i = db->num_fields - 1; i >= 0; i--)
 344                         if (db->index[i] != NULL)
 345                                 lh_OPENSSL_STRING_free(db->index[i]);
 346                 free(db->index);
 347         }
 348         free(db->qual);
 349         if (db->data != NULL) {
 350                 for (i = sk_OPENSSL_PSTRING_num(db->data) - 1; i >= 0; i--) {
 351                         /* check if any 'fields' have been allocated
 352                          * from outside of the initial block */
 353                         p = sk_OPENSSL_PSTRING_value(db->data, i);
 354                         max = p[db->num_fields]; /* last address */
 355                         if (max == NULL) /* new row */
 356                         {
 357                                 for (n = 0; n < db->num_fields; n++)
 358                                         free(p[n]);
 359                         } else {
 360                                 for (n = 0; n < db->num_fields; n++) {
 361                                         if (((p[n] < (char *)p) ||
 362                                             (p[n] > max)) &&
 363                                             (p[n] != NULL))
 364                                                 free(p[n]);
 365                                 }
 366                         }
 367                         free(sk_OPENSSL_PSTRING_value(db->data, i));
 368                 }
 369                 sk_OPENSSL_PSTRING_free(db->data);
 370         }
 371         free(db);
 372 }