crypto/openssl/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, *f;
  81     OPENSSL_STRING *pp;
  82     BUF_MEM *buf = NULL;
  83
  84     if ((buf = BUF_MEM_new()) == NULL)
  85         goto err;
  86     if (!BUF_MEM_grow(buf, size))
  87         goto err;
  88
  89     if ((ret = OPENSSL_malloc(sizeof(TXT_DB))) == NULL)
  90         goto err;
  91     ret->num_fields = num;
  92     ret->index = NULL;
  93     ret->qual = NULL;
  94     if ((ret->data = sk_OPENSSL_PSTRING_new_null()) == NULL)
  95         goto err;
  96     if ((ret->index = OPENSSL_malloc(sizeof(*ret->index) * num)) == NULL)
  97         goto err;
  98     if ((ret->qual = OPENSSL_malloc(sizeof(*(ret->qual)) * num)) == NULL)
  99         goto err;
 100     for (i = 0; i < num; i++) {
 101         ret->index[i] = NULL;
 102         ret->qual[i] = NULL;
 103     }
 104
 105     add = (num + 1) * sizeof(char *);
 106     buf->data[size - 1] = '\0';
 107     offset = 0;
 108     for (;;) {
 109         if (offset != 0) {
 110             size += BUFSIZE;
 111             if (!BUF_MEM_grow_clean(buf, size))
 112                 goto err;
 113         }
 114         buf->data[offset] = '\0';
 115         BIO_gets(in, &(buf->data[offset]), size - offset);
 116         ln++;
 117         if (buf->data[offset] == '\0')
 118             break;
 119         if ((offset == 0) && (buf->data[0] == '#'))
 120             continue;
 121         i = strlen(&(buf->data[offset]));
 122         offset += i;
 123         if (buf->data[offset - 1] != '\n')
 124             continue;
 125         else {
 126             buf->data[offset - 1] = '\0'; /* blat the '\n' */
 127             if (!(p = OPENSSL_malloc(add + offset)))
 128                 goto err;
 129             offset = 0;
 130         }
 131         pp = (char **)p;
 132         p += add;
 133         n = 0;
 134         pp[n++] = p;
 135         i = 0;
 136         f = buf->data;
 137
 138         esc = 0;
 139         for (;;) {
 140             if (*f == '\0')
 141                 break;
 142             if (*f == '\t') {
 143                 if (esc)
 144                     p--;
 145                 else {
 146                     *(p++) = '\0';
 147                     f++;
 148                     if (n >= num)
 149                         break;
 150                     pp[n++] = p;
 151                     continue;
 152                 }
 153             }
 154             esc = (*f == '\\');
 155             *(p++) = *(f++);
 156         }
 157         *(p++) = '\0';
 158         if ((n != num) || (*f != '\0')) {
 159 #if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16) /* temporary
 160                                                                * fix :-( */
 161             fprintf(stderr,
 162                     "wrong number of fields on line %ld (looking for field %d, got %d, '%s' left)\n",
 163                     ln, num, n, f);
 164 #endif
 165             er = 2;
 166             goto err;
 167         }
 168         pp[n] = p;
 169         if (!sk_OPENSSL_PSTRING_push(ret->data, pp)) {
 170 #if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16) /* temporary
 171                                                                * fix :-( */
 172             fprintf(stderr, "failure in sk_push\n");
 173 #endif
 174             er = 2;
 175             goto err;
 176         }
 177     }
 178     er = 0;
 179  err:
 180     BUF_MEM_free(buf);
 181     if (er) {
 182 #if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16)
 183         if (er == 1)
 184             fprintf(stderr, "OPENSSL_malloc failure\n");
 185 #endif
 186         if (ret != NULL) {
 187             if (ret->data != NULL)
 188                 sk_OPENSSL_PSTRING_free(ret->data);
 189             if (ret->index != NULL)
 190                 OPENSSL_free(ret->index);
 191             if (ret->qual != NULL)
 192                 OPENSSL_free(ret->qual);
 193             if (ret != NULL)
 194                 OPENSSL_free(ret);
 195         }
 196         return (NULL);
 197     } else
 198         return (ret);
 199 }
 200
 201 OPENSSL_STRING *TXT_DB_get_by_index(TXT_DB *db, int idx,
 202                                     OPENSSL_STRING *value)
 203 {
 204     OPENSSL_STRING *ret;
 205     LHASH_OF(OPENSSL_STRING) *lh;
 206
 207     if (idx >= db->num_fields) {
 208         db->error = DB_ERROR_INDEX_OUT_OF_RANGE;
 209         return (NULL);
 210     }
 211     lh = db->index[idx];
 212     if (lh == NULL) {
 213         db->error = DB_ERROR_NO_INDEX;
 214         return (NULL);
 215     }
 216     ret = lh_OPENSSL_STRING_retrieve(lh, value);
 217     db->error = DB_ERROR_OK;
 218     return (ret);
 219 }
 220
 221 int TXT_DB_create_index(TXT_DB *db, int field, int (*qual) (OPENSSL_STRING *),
 222                         LHASH_HASH_FN_TYPE hash, LHASH_COMP_FN_TYPE cmp)
 223 {
 224     LHASH_OF(OPENSSL_STRING) *idx;
 225     OPENSSL_STRING *r;
 226     int i, n;
 227
 228     if (field >= db->num_fields) {
 229         db->error = DB_ERROR_INDEX_OUT_OF_RANGE;
 230         return (0);
 231     }
 232     /* FIXME: we lose type checking at this point */
 233     if ((idx = (LHASH_OF(OPENSSL_STRING) *)lh_new(hash, cmp)) == NULL) {
 234         db->error = DB_ERROR_MALLOC;
 235         return (0);
 236     }
 237     n = sk_OPENSSL_PSTRING_num(db->data);
 238     for (i = 0; i < n; i++) {
 239         r = sk_OPENSSL_PSTRING_value(db->data, i);
 240         if ((qual != NULL) && (qual(r) == 0))
 241             continue;
 242         if ((r = lh_OPENSSL_STRING_insert(idx, r)) != NULL) {
 243             db->error = DB_ERROR_INDEX_CLASH;
 244             db->arg1 = sk_OPENSSL_PSTRING_find(db->data, r);
 245             db->arg2 = i;
 246             lh_OPENSSL_STRING_free(idx);
 247             return (0);
 248         }
 249     }
 250     if (db->index[field] != NULL)
 251         lh_OPENSSL_STRING_free(db->index[field]);
 252     db->index[field] = idx;
 253     db->qual[field] = qual;
 254     return (1);
 255 }
 256
 257 long TXT_DB_write(BIO *out, TXT_DB *db)
 258 {
 259     long i, j, n, nn, l, tot = 0;
 260     char *p, **pp, *f;
 261     BUF_MEM *buf = NULL;
 262     long ret = -1;
 263
 264     if ((buf = BUF_MEM_new()) == NULL)
 265         goto err;
 266     n = sk_OPENSSL_PSTRING_num(db->data);
 267     nn = db->num_fields;
 268     for (i = 0; i < n; i++) {
 269         pp = sk_OPENSSL_PSTRING_value(db->data, i);
 270
 271         l = 0;
 272         for (j = 0; j < nn; j++) {
 273             if (pp[j] != NULL)
 274                 l += strlen(pp[j]);
 275         }
 276         if (!BUF_MEM_grow_clean(buf, (int)(l * 2 + nn)))
 277             goto err;
 278
 279         p = buf->data;
 280         for (j = 0; j < nn; j++) {
 281             f = pp[j];
 282             if (f != NULL)
 283                 for (;;) {
 284                     if (*f == '\0')
 285                         break;
 286                     if (*f == '\t')
 287                         *(p++) = '\\';
 288                     *(p++) = *(f++);
 289                 }
 290             *(p++) = '\t';
 291         }
 292         p[-1] = '\n';
 293         j = p - buf->data;
 294         if (BIO_write(out, buf->data, (int)j) != j)
 295             goto err;
 296         tot += j;
 297     }
 298     ret = tot;
 299  err:
 300     if (buf != NULL)
 301         BUF_MEM_free(buf);
 302     return (ret);
 303 }
 304
 305 int TXT_DB_insert(TXT_DB *db, OPENSSL_STRING *row)
 306 {
 307     int i;
 308     OPENSSL_STRING *r;
 309
 310     for (i = 0; i < db->num_fields; i++) {
 311         if (db->index[i] != NULL) {
 312             if ((db->qual[i] != NULL) && (db->qual[i] (row) == 0))
 313                 continue;
 314             r = lh_OPENSSL_STRING_retrieve(db->index[i], row);
 315             if (r != NULL) {
 316                 db->error = DB_ERROR_INDEX_CLASH;
 317                 db->arg1 = i;
 318                 db->arg_row = r;
 319                 goto err;
 320             }
 321         }
 322     }
 323     /* We have passed the index checks, now just append and insert */
 324     if (!sk_OPENSSL_PSTRING_push(db->data, row)) {
 325         db->error = DB_ERROR_MALLOC;
 326         goto err;
 327     }
 328
 329     for (i = 0; i < db->num_fields; i++) {
 330         if (db->index[i] != NULL) {
 331             if ((db->qual[i] != NULL) && (db->qual[i] (row) == 0))
 332                 continue;
 333             (void)lh_OPENSSL_STRING_insert(db->index[i], row);
 334         }
 335     }
 336     return (1);
 337  err:
 338     return (0);
 339 }
 340
 341 void TXT_DB_free(TXT_DB *db)
 342 {
 343     int i, n;
 344     char **p, *max;
 345
 346     if (db == NULL)
 347         return;
 348
 349     if (db->index != NULL) {
 350         for (i = db->num_fields - 1; i >= 0; i--)
 351             if (db->index[i] != NULL)
 352                 lh_OPENSSL_STRING_free(db->index[i]);
 353         OPENSSL_free(db->index);
 354     }
 355     if (db->qual != NULL)
 356         OPENSSL_free(db->qual);
 357     if (db->data != NULL) {
 358         for (i = sk_OPENSSL_PSTRING_num(db->data) - 1; i >= 0; i--) {
 359             /*
 360              * check if any 'fields' have been allocated from outside of the
 361              * initial block
 362              */
 363             p = sk_OPENSSL_PSTRING_value(db->data, i);
 364             max = p[db->num_fields]; /* last address */
 365             if (max == NULL) {  /* new row */
 366                 for (n = 0; n < db->num_fields; n++)
 367                     if (p[n] != NULL)
 368                         OPENSSL_free(p[n]);
 369             } else {
 370                 for (n = 0; n < db->num_fields; n++) {
 371                     if (((p[n] < (char *)p) || (p[n] > max))
 372                         && (p[n] != NULL))
 373                         OPENSSL_free(p[n]);
 374                 }
 375             }
 376             OPENSSL_free(sk_OPENSSL_PSTRING_value(db->data, i));
 377         }
 378         sk_OPENSSL_PSTRING_free(db->data);
 379     }
 380     OPENSSL_free(db);
 381 }