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 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 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 = OPENSSL_malloc(sizeof(*ret))) == 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 = OPENSSL_malloc(sizeof(*ret->index) * num)) == NULL)
  96         goto err;
  97     if ((ret->qual = OPENSSL_malloc(sizeof(*(ret->qual)) * num)) == 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 = OPENSSL_malloc(add + offset)) == NULL)
 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 #if !defined(OPENSSL_NO_STDIO)  /* temporary fix :-( */
 159             fprintf(stderr,
 160                     "wrong number of fields on line %ld (looking for field %d, got %d, '%s' left)\n",
 161                     ln, num, n, f);
 162 #endif
 163             goto err;
 164         }
 165         pp[n] = p;
 166         if (!sk_OPENSSL_PSTRING_push(ret->data, pp))
 167             goto err;
 168     }
 169     BUF_MEM_free(buf);
 170     return ret;
 171  err:
 172     BUF_MEM_free(buf);
 173     if (ret != NULL) {
 174         sk_OPENSSL_PSTRING_free(ret->data);
 175         OPENSSL_free(ret->index);
 176         OPENSSL_free(ret->qual);
 177         OPENSSL_free(ret);
 178     }
 179     return (NULL);
 180 }
 181
 182 OPENSSL_STRING *TXT_DB_get_by_index(TXT_DB *db, int idx,
 183                                     OPENSSL_STRING *value)
 184 {
 185     OPENSSL_STRING *ret;
 186     LHASH_OF(OPENSSL_STRING) *lh;
 187
 188     if (idx >= db->num_fields) {
 189         db->error = DB_ERROR_INDEX_OUT_OF_RANGE;
 190         return (NULL);
 191     }
 192     lh = db->index[idx];
 193     if (lh == NULL) {
 194         db->error = DB_ERROR_NO_INDEX;
 195         return (NULL);
 196     }
 197     ret = lh_OPENSSL_STRING_retrieve(lh, value);
 198     db->error = DB_ERROR_OK;
 199     return (ret);
 200 }
 201
 202 int TXT_DB_create_index(TXT_DB *db, int field, int (*qual) (OPENSSL_STRING *),
 203                         LHASH_HASH_FN_TYPE hash, LHASH_COMP_FN_TYPE cmp)
 204 {
 205     LHASH_OF(OPENSSL_STRING) *idx;
 206     OPENSSL_STRING *r;
 207     int i, n;
 208
 209     if (field >= db->num_fields) {
 210         db->error = DB_ERROR_INDEX_OUT_OF_RANGE;
 211         return (0);
 212     }
 213     /* FIXME: we lose type checking at this point */
 214     if ((idx = (LHASH_OF(OPENSSL_STRING) *)lh_new(hash, cmp)) == NULL) {
 215         db->error = DB_ERROR_MALLOC;
 216         return (0);
 217     }
 218     n = sk_OPENSSL_PSTRING_num(db->data);
 219     for (i = 0; i < n; i++) {
 220         r = sk_OPENSSL_PSTRING_value(db->data, i);
 221         if ((qual != NULL) && (qual(r) == 0))
 222             continue;
 223         if ((r = lh_OPENSSL_STRING_insert(idx, r)) != NULL) {
 224             db->error = DB_ERROR_INDEX_CLASH;
 225             db->arg1 = sk_OPENSSL_PSTRING_find(db->data, r);
 226             db->arg2 = i;
 227             lh_OPENSSL_STRING_free(idx);
 228             return (0);
 229         }
 230     }
 231     lh_OPENSSL_STRING_free(db->index[field]);
 232     db->index[field] = idx;
 233     db->qual[field] = qual;
 234     return (1);
 235 }
 236
 237 long TXT_DB_write(BIO *out, TXT_DB *db)
 238 {
 239     long i, j, n, nn, l, tot = 0;
 240     char *p, **pp, *f;
 241     BUF_MEM *buf = NULL;
 242     long ret = -1;
 243
 244     if ((buf = BUF_MEM_new()) == NULL)
 245         goto err;
 246     n = sk_OPENSSL_PSTRING_num(db->data);
 247     nn = db->num_fields;
 248     for (i = 0; i < n; i++) {
 249         pp = sk_OPENSSL_PSTRING_value(db->data, i);
 250
 251         l = 0;
 252         for (j = 0; j < nn; j++) {
 253             if (pp[j] != NULL)
 254                 l += strlen(pp[j]);
 255         }
 256         if (!BUF_MEM_grow_clean(buf, (int)(l * 2 + nn)))
 257             goto err;
 258
 259         p = buf->data;
 260         for (j = 0; j < nn; j++) {
 261             f = pp[j];
 262             if (f != NULL)
 263                 for (;;) {
 264                     if (*f == '\0')
 265                         break;
 266                     if (*f == '\t')
 267                         *(p++) = '\\';
 268                     *(p++) = *(f++);
 269                 }
 270             *(p++) = '\t';
 271         }
 272         p[-1] = '\n';
 273         j = p - buf->data;
 274         if (BIO_write(out, buf->data, (int)j) != j)
 275             goto err;
 276         tot += j;
 277     }
 278     ret = tot;
 279  err:
 280     BUF_MEM_free(buf);
 281     return (ret);
 282 }
 283
 284 int TXT_DB_insert(TXT_DB *db, OPENSSL_STRING *row)
 285 {
 286     int i;
 287     OPENSSL_STRING *r;
 288
 289     for (i = 0; i < db->num_fields; i++) {
 290         if (db->index[i] != NULL) {
 291             if ((db->qual[i] != NULL) && (db->qual[i] (row) == 0))
 292                 continue;
 293             r = lh_OPENSSL_STRING_retrieve(db->index[i], row);
 294             if (r != NULL) {
 295                 db->error = DB_ERROR_INDEX_CLASH;
 296                 db->arg1 = i;
 297                 db->arg_row = r;
 298                 goto err;
 299             }
 300         }
 301     }
 302     /* We have passed the index checks, now just append and insert */
 303     if (!sk_OPENSSL_PSTRING_push(db->data, row)) {
 304         db->error = DB_ERROR_MALLOC;
 305         goto err;
 306     }
 307
 308     for (i = 0; i < db->num_fields; i++) {
 309         if (db->index[i] != NULL) {
 310             if ((db->qual[i] != NULL) && (db->qual[i] (row) == 0))
 311                 continue;
 312             (void)lh_OPENSSL_STRING_insert(db->index[i], row);
 313         }
 314     }
 315     return (1);
 316  err:
 317     return (0);
 318 }
 319
 320 void TXT_DB_free(TXT_DB *db)
 321 {
 322     int i, n;
 323     char **p, *max;
 324
 325     if (db == NULL)
 326         return;
 327
 328     if (db->index != NULL) {
 329         for (i = db->num_fields - 1; i >= 0; i--)
 330             lh_OPENSSL_STRING_free(db->index[i]);
 331         OPENSSL_free(db->index);
 332     }
 333     OPENSSL_free(db->qual);
 334     if (db->data != NULL) {
 335         for (i = sk_OPENSSL_PSTRING_num(db->data) - 1; i >= 0; i--) {
 336             /*
 337              * check if any 'fields' have been allocated from outside of the
 338              * initial block
 339              */
 340             p = sk_OPENSSL_PSTRING_value(db->data, i);
 341             max = p[db->num_fields]; /* last address */
 342             if (max == NULL) {  /* new row */
 343                 for (n = 0; n < db->num_fields; n++)
 344                     OPENSSL_free(p[n]);
 345             } else {
 346                 for (n = 0; n < db->num_fields; n++) {
 347                     if (((p[n] < (char *)p) || (p[n] > max)))
 348                         OPENSSL_free(p[n]);
 349                 }
 350             }
 351             OPENSSL_free(sk_OPENSSL_PSTRING_value(db->data, i));
 352         }
 353         sk_OPENSSL_PSTRING_free(db->data);
 354     }
 355     OPENSSL_free(db);
 356 }