crypto/txt_db/txt_db.c

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