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