txt_db.c revision 325335 
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
69const char TXT_DB_version[] = "TXT_DB" OPENSSL_VERSION_PTEXT;
70
71TXT_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            OPENSSL_free(pp);
166            er = 2;
167            goto err;
168        }
169        pp[n] = p;
170        if (!sk_OPENSSL_PSTRING_push(ret->data, pp)) {
171#if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16) /* temporary
172                                                               * fix :-( */
173            fprintf(stderr, "failure in sk_push\n");
174#endif
175            OPENSSL_free(pp);
176            er = 2;
177            goto err;
178        }
179    }
180    er = 0;
181 err:
182    BUF_MEM_free(buf);
183    if (er) {
184#if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16)
185        if (er == 1)
186            fprintf(stderr, "OPENSSL_malloc failure\n");
187#endif
188        if (ret != NULL) {
189            if (ret->data != NULL)
190                sk_OPENSSL_PSTRING_free(ret->data);
191            if (ret->index != NULL)
192                OPENSSL_free(ret->index);
193            if (ret->qual != NULL)
194                OPENSSL_free(ret->qual);
195            if (ret != NULL)
196                OPENSSL_free(ret);
197        }
198        return (NULL);
199    } else
200        return (ret);
201}
202
203OPENSSL_STRING *TXT_DB_get_by_index(TXT_DB *db, int idx,
204                                    OPENSSL_STRING *value)
205{
206    OPENSSL_STRING *ret;
207    LHASH_OF(OPENSSL_STRING) *lh;
208
209    if (idx >= db->num_fields) {
210        db->error = DB_ERROR_INDEX_OUT_OF_RANGE;
211        return (NULL);
212    }
213    lh = db->index[idx];
214    if (lh == NULL) {
215        db->error = DB_ERROR_NO_INDEX;
216        return (NULL);
217    }
218    ret = lh_OPENSSL_STRING_retrieve(lh, value);
219    db->error = DB_ERROR_OK;
220    return (ret);
221}
222
223int TXT_DB_create_index(TXT_DB *db, int field, int (*qual) (OPENSSL_STRING *),
224                        LHASH_HASH_FN_TYPE hash, LHASH_COMP_FN_TYPE cmp)
225{
226    LHASH_OF(OPENSSL_STRING) *idx;
227    OPENSSL_STRING *r, *k;
228    int i, n;
229
230    if (field >= db->num_fields) {
231        db->error = DB_ERROR_INDEX_OUT_OF_RANGE;
232        return (0);
233    }
234    /* FIXME: we lose type checking at this point */
235    if ((idx = (LHASH_OF(OPENSSL_STRING) *)lh_new(hash, cmp)) == NULL) {
236        db->error = DB_ERROR_MALLOC;
237        return (0);
238    }
239    n = sk_OPENSSL_PSTRING_num(db->data);
240    for (i = 0; i < n; i++) {
241        r = sk_OPENSSL_PSTRING_value(db->data, i);
242        if ((qual != NULL) && (qual(r) == 0))
243            continue;
244        if ((k = lh_OPENSSL_STRING_insert(idx, r)) != NULL) {
245            db->error = DB_ERROR_INDEX_CLASH;
246            db->arg1 = sk_OPENSSL_PSTRING_find(db->data, k);
247            db->arg2 = i;
248            lh_OPENSSL_STRING_free(idx);
249            return (0);
250        }
251        if (lh_OPENSSL_STRING_retrieve(idx, r) == NULL) {
252            db->error = DB_ERROR_MALLOC;
253            lh_OPENSSL_STRING_free(idx);
254            return (0);
255        }
256    }
257    if (db->index[field] != NULL)
258        lh_OPENSSL_STRING_free(db->index[field]);
259    db->index[field] = idx;
260    db->qual[field] = qual;
261    return (1);
262}
263
264long TXT_DB_write(BIO *out, TXT_DB *db)
265{
266    long i, j, n, nn, l, tot = 0;
267    char *p, **pp, *f;
268    BUF_MEM *buf = NULL;
269    long ret = -1;
270
271    if ((buf = BUF_MEM_new()) == NULL)
272        goto err;
273    n = sk_OPENSSL_PSTRING_num(db->data);
274    nn = db->num_fields;
275    for (i = 0; i < n; i++) {
276        pp = sk_OPENSSL_PSTRING_value(db->data, i);
277
278        l = 0;
279        for (j = 0; j < nn; j++) {
280            if (pp[j] != NULL)
281                l += strlen(pp[j]);
282        }
283        if (!BUF_MEM_grow_clean(buf, (int)(l * 2 + nn)))
284            goto err;
285
286        p = buf->data;
287        for (j = 0; j < nn; j++) {
288            f = pp[j];
289            if (f != NULL)
290                for (;;) {
291                    if (*f == '\0')
292                        break;
293                    if (*f == '\t')
294                        *(p++) = '\\';
295                    *(p++) = *(f++);
296                }
297            *(p++) = '\t';
298        }
299        p[-1] = '\n';
300        j = p - buf->data;
301        if (BIO_write(out, buf->data, (int)j) != j)
302            goto err;
303        tot += j;
304    }
305    ret = tot;
306 err:
307    if (buf != NULL)
308        BUF_MEM_free(buf);
309    return (ret);
310}
311
312int TXT_DB_insert(TXT_DB *db, OPENSSL_STRING *row)
313{
314    int i;
315    OPENSSL_STRING *r;
316
317    for (i = 0; i < db->num_fields; i++) {
318        if (db->index[i] != NULL) {
319            if ((db->qual[i] != NULL) && (db->qual[i] (row) == 0))
320                continue;
321            r = lh_OPENSSL_STRING_retrieve(db->index[i], row);
322            if (r != NULL) {
323                db->error = DB_ERROR_INDEX_CLASH;
324                db->arg1 = i;
325                db->arg_row = r;
326                goto err;
327            }
328        }
329    }
330
331    for (i = 0; i < db->num_fields; i++) {
332        if (db->index[i] != NULL) {
333            if ((db->qual[i] != NULL) && (db->qual[i] (row) == 0))
334                continue;
335            (void)lh_OPENSSL_STRING_insert(db->index[i], row);
336            if (lh_OPENSSL_STRING_retrieve(db->index[i], row) == NULL)
337                goto err1;
338        }
339    }
340    if (!sk_OPENSSL_PSTRING_push(db->data, row))
341        goto err1;
342    return (1);
343
344 err1:
345    db->error = DB_ERROR_MALLOC;
346    while (i-- > 0) {
347        if (db->index[i] != NULL) {
348            if ((db->qual[i] != NULL) && (db->qual[i] (row) == 0))
349                continue;
350            (void)lh_OPENSSL_STRING_delete(db->index[i], row);
351        }
352    }
353 err:
354    return (0);
355}
356
357void TXT_DB_free(TXT_DB *db)
358{
359    int i, n;
360    char **p, *max;
361
362    if (db == NULL)
363        return;
364
365    if (db->index != NULL) {
366        for (i = db->num_fields - 1; i >= 0; i--)
367            if (db->index[i] != NULL)
368                lh_OPENSSL_STRING_free(db->index[i]);
369        OPENSSL_free(db->index);
370    }
371    if (db->qual != NULL)
372        OPENSSL_free(db->qual);
373    if (db->data != NULL) {
374        for (i = sk_OPENSSL_PSTRING_num(db->data) - 1; i >= 0; i--) {
375            /*
376             * check if any 'fields' have been allocated from outside of the
377             * initial block
378             */
379            p = sk_OPENSSL_PSTRING_value(db->data, i);
380            max = p[db->num_fields]; /* last address */
381            if (max == NULL) {  /* new row */
382                for (n = 0; n < db->num_fields; n++)
383                    if (p[n] != NULL)
384                        OPENSSL_free(p[n]);
385            } else {
386                for (n = 0; n < db->num_fields; n++) {
387                    if (((p[n] < (char *)p) || (p[n] > max))
388                        && (p[n] != NULL))
389                        OPENSSL_free(p[n]);
390                }
391            }
392            OPENSSL_free(sk_OPENSSL_PSTRING_value(db->data, i));
393        }
394        sk_OPENSSL_PSTRING_free(db->data);
395    }
396    OPENSSL_free(db);
397}
398