1 /* $OpenBSD: txt_db.c,v 1.18 2014/07/11 08:44:49 jsing Exp $ */ 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 63 #include <openssl/buffer.h> 64 #include <openssl/txt_db.h> 65 66 #undef BUFSIZE 67 #define BUFSIZE 512 68 69 TXT_DB * 70 TXT_DB_read(BIO *in, int num) 71 { 72 TXT_DB *ret = NULL; 73 int er = 1; 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 = malloc(sizeof(TXT_DB))) == 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 = reallocarray(NULL, num, sizeof(*ret->index))) == NULL) 96 goto err; 97 if ((ret->qual = reallocarray(NULL, num, sizeof(*(ret->qual)))) == 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 = malloc(add + offset))) 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 fprintf(stderr, "wrong number of fields on line %ld (looking for field %d, got %d, '%s' left)\n",ln,num,n,f); 159 er = 2; 160 goto err; 161 } 162 pp[n] = p; 163 if (!sk_OPENSSL_PSTRING_push(ret->data, pp)) { 164 fprintf(stderr, "failure in sk_push\n"); 165 er = 2; 166 goto err; 167 } 168 } 169 er = 0; 170 171 err: 172 BUF_MEM_free(buf); 173 if (er) { 174 if (er == 1) 175 fprintf(stderr, "malloc failure\n"); 176 if (ret != NULL) { 177 if (ret->data != NULL) 178 sk_OPENSSL_PSTRING_free(ret->data); 179 free(ret->index); 180 free(ret->qual); 181 free(ret); 182 } 183 return (NULL); 184 } else 185 return (ret); 186 } 187 188 OPENSSL_STRING * 189 TXT_DB_get_by_index(TXT_DB *db, int idx, OPENSSL_STRING *value) 190 { 191 OPENSSL_STRING *ret; 192 LHASH_OF(OPENSSL_STRING) *lh; 193 194 if (idx >= db->num_fields) { 195 db->error = DB_ERROR_INDEX_OUT_OF_RANGE; 196 return (NULL); 197 } 198 lh = db->index[idx]; 199 if (lh == NULL) { 200 db->error = DB_ERROR_NO_INDEX; 201 return (NULL); 202 } 203 ret = lh_OPENSSL_STRING_retrieve(lh, value); 204 db->error = DB_ERROR_OK; 205 return (ret); 206 } 207 208 int 209 TXT_DB_create_index(TXT_DB *db, int field, int (*qual)(OPENSSL_STRING *), 210 LHASH_HASH_FN_TYPE hash, LHASH_COMP_FN_TYPE cmp) 211 { 212 LHASH_OF(OPENSSL_STRING) *idx; 213 OPENSSL_STRING *r; 214 int i, n; 215 216 if (field >= db->num_fields) { 217 db->error = DB_ERROR_INDEX_OUT_OF_RANGE; 218 return (0); 219 } 220 /* FIXME: we lose type checking at this point */ 221 if ((idx = (LHASH_OF(OPENSSL_STRING) *)lh_new(hash, cmp)) == NULL) { 222 db->error = DB_ERROR_MALLOC; 223 return (0); 224 } 225 n = sk_OPENSSL_PSTRING_num(db->data); 226 for (i = 0; i < n; i++) { 227 r = sk_OPENSSL_PSTRING_value(db->data, i); 228 if ((qual != NULL) && (qual(r) == 0)) 229 continue; 230 if ((r = lh_OPENSSL_STRING_insert(idx, r)) != NULL) { 231 db->error = DB_ERROR_INDEX_CLASH; 232 db->arg1 = sk_OPENSSL_PSTRING_find(db->data, r); 233 db->arg2 = i; 234 lh_OPENSSL_STRING_free(idx); 235 return (0); 236 } 237 } 238 if (db->index[field] != NULL) 239 lh_OPENSSL_STRING_free(db->index[field]); 240 db->index[field] = idx; 241 db->qual[field] = qual; 242 return (1); 243 } 244 245 long 246 TXT_DB_write(BIO *out, TXT_DB *db) 247 { 248 long i, j,n, nn, l, tot = 0; 249 char *p, **pp, *f; 250 BUF_MEM *buf = NULL; 251 long ret = -1; 252 253 if ((buf = BUF_MEM_new()) == NULL) 254 goto err; 255 n = sk_OPENSSL_PSTRING_num(db->data); 256 nn = db->num_fields; 257 for (i = 0; i < n; i++) { 258 pp = sk_OPENSSL_PSTRING_value(db->data, i); 259 260 l = 0; 261 for (j = 0; j < nn; j++) { 262 if (pp[j] != NULL) 263 l += strlen(pp[j]); 264 } 265 if (!BUF_MEM_grow_clean(buf, (int)(l*2 + nn))) 266 goto err; 267 268 p = buf->data; 269 for (j = 0; j < nn; j++) { 270 f = pp[j]; 271 if (f != NULL) 272 for (;;) { 273 if (*f == '\0') 274 break; 275 if (*f == '\t') 276 *(p++) = '\\'; 277 *(p++) = *(f++); 278 } 279 *(p++) = '\t'; 280 } 281 p[-1] = '\n'; 282 j = p - buf->data; 283 if (BIO_write(out, buf->data, (int)j) != j) 284 goto err; 285 tot += j; 286 } 287 ret = tot; 288 289 err: 290 if (buf != NULL) 291 BUF_MEM_free(buf); 292 return (ret); 293 } 294 295 int 296 TXT_DB_insert(TXT_DB *db, OPENSSL_STRING *row) 297 { 298 int i; 299 OPENSSL_STRING *r; 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 r = lh_OPENSSL_STRING_retrieve(db->index[i], row); 306 if (r != NULL) { 307 db->error = DB_ERROR_INDEX_CLASH; 308 db->arg1 = i; 309 db->arg_row = r; 310 goto err; 311 } 312 } 313 } 314 /* We have passed the index checks, now just append and insert */ 315 if (!sk_OPENSSL_PSTRING_push(db->data, row)) { 316 db->error = DB_ERROR_MALLOC; 317 goto err; 318 } 319 320 for (i = 0; i < db->num_fields; i++) { 321 if (db->index[i] != NULL) { 322 if ((db->qual[i] != NULL) && (db->qual[i](row) == 0)) 323 continue; 324 (void)lh_OPENSSL_STRING_insert(db->index[i], row); 325 } 326 } 327 return (1); 328 329 err: 330 return (0); 331 } 332 333 void 334 TXT_DB_free(TXT_DB *db) 335 { 336 int i, n; 337 char **p, *max; 338 339 if (db == NULL) 340 return; 341 342 if (db->index != NULL) { 343 for (i = db->num_fields - 1; i >= 0; i--) 344 if (db->index[i] != NULL) 345 lh_OPENSSL_STRING_free(db->index[i]); 346 free(db->index); 347 } 348 free(db->qual); 349 if (db->data != NULL) { 350 for (i = sk_OPENSSL_PSTRING_num(db->data) - 1; i >= 0; i--) { 351 /* check if any 'fields' have been allocated 352 * from outside of the initial block */ 353 p = sk_OPENSSL_PSTRING_value(db->data, i); 354 max = p[db->num_fields]; /* last address */ 355 if (max == NULL) /* new row */ 356 { 357 for (n = 0; n < db->num_fields; n++) 358 free(p[n]); 359 } else { 360 for (n = 0; n < db->num_fields; n++) { 361 if (((p[n] < (char *)p) || 362 (p[n] > max)) && 363 (p[n] != NULL)) 364 free(p[n]); 365 } 366 } 367 free(sk_OPENSSL_PSTRING_value(db->data, i)); 368 } 369 sk_OPENSSL_PSTRING_free(db->data); 370 } 371 free(db); 372 } 373