[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include <stdlib.h>
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| 12 | #include <string.h>
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| 13 | #include "internal/cryptlib.h"
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| 14 | #include <openssl/buffer.h>
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| 15 | #include <openssl/txt_db.h>
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| 16 |
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| 17 | #undef BUFSIZE
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| 18 | #define BUFSIZE 512
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| 19 |
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| 20 | TXT_DB *TXT_DB_read(BIO *in, int num)
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| 21 | {
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| 22 | TXT_DB *ret = NULL;
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| 23 | int esc = 0;
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| 24 | long ln = 0;
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| 25 | int i, add, n;
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| 26 | int size = BUFSIZE;
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| 27 | int offset = 0;
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| 28 | char *p, *f;
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| 29 | OPENSSL_STRING *pp;
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| 30 | BUF_MEM *buf = NULL;
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| 31 |
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| 32 | if ((buf = BUF_MEM_new()) == NULL)
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| 33 | goto err;
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| 34 | if (!BUF_MEM_grow(buf, size))
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| 35 | goto err;
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| 36 |
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| 37 | if ((ret = OPENSSL_malloc(sizeof(*ret))) == NULL)
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| 38 | goto err;
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| 39 | ret->num_fields = num;
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| 40 | ret->index = NULL;
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| 41 | ret->qual = NULL;
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| 42 | if ((ret->data = sk_OPENSSL_PSTRING_new_null()) == NULL)
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| 43 | goto err;
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| 44 | if ((ret->index = OPENSSL_malloc(sizeof(*ret->index) * num)) == NULL)
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| 45 | goto err;
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| 46 | if ((ret->qual = OPENSSL_malloc(sizeof(*(ret->qual)) * num)) == NULL)
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| 47 | goto err;
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| 48 | for (i = 0; i < num; i++) {
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| 49 | ret->index[i] = NULL;
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| 50 | ret->qual[i] = NULL;
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| 51 | }
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| 52 |
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| 53 | add = (num + 1) * sizeof(char *);
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| 54 | buf->data[size - 1] = '\0';
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| 55 | offset = 0;
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| 56 | for (;;) {
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| 57 | if (offset != 0) {
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| 58 | size += BUFSIZE;
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| 59 | if (!BUF_MEM_grow_clean(buf, size))
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| 60 | goto err;
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| 61 | }
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| 62 | buf->data[offset] = '\0';
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| 63 | BIO_gets(in, &(buf->data[offset]), size - offset);
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| 64 | ln++;
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| 65 | if (buf->data[offset] == '\0')
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| 66 | break;
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| 67 | if ((offset == 0) && (buf->data[0] == '#'))
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| 68 | continue;
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| 69 | i = strlen(&(buf->data[offset]));
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| 70 | offset += i;
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| 71 | if (buf->data[offset - 1] != '\n')
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| 72 | continue;
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| 73 | else {
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| 74 | buf->data[offset - 1] = '\0'; /* blat the '\n' */
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| 75 | if ((p = OPENSSL_malloc(add + offset)) == NULL)
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| 76 | goto err;
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| 77 | offset = 0;
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| 78 | }
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| 79 | pp = (char **)p;
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| 80 | p += add;
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| 81 | n = 0;
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| 82 | pp[n++] = p;
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| 83 | i = 0;
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| 84 | f = buf->data;
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| 85 |
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| 86 | esc = 0;
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| 87 | for (;;) {
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| 88 | if (*f == '\0')
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| 89 | break;
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| 90 | if (*f == '\t') {
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| 91 | if (esc)
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| 92 | p--;
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| 93 | else {
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| 94 | *(p++) = '\0';
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| 95 | f++;
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| 96 | if (n >= num)
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| 97 | break;
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| 98 | pp[n++] = p;
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| 99 | continue;
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| 100 | }
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| 101 | }
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| 102 | esc = (*f == '\\');
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| 103 | *(p++) = *(f++);
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| 104 | }
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| 105 | *(p++) = '\0';
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| 106 | if ((n != num) || (*f != '\0')) {
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| 107 | ret->error = DB_ERROR_WRONG_NUM_FIELDS;
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| 108 | goto err;
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| 109 | }
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| 110 | pp[n] = p;
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| 111 | if (!sk_OPENSSL_PSTRING_push(ret->data, pp))
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| 112 | goto err;
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| 113 | }
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| 114 | BUF_MEM_free(buf);
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| 115 | return ret;
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| 116 | err:
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| 117 | BUF_MEM_free(buf);
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| 118 | if (ret != NULL) {
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| 119 | sk_OPENSSL_PSTRING_free(ret->data);
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| 120 | OPENSSL_free(ret->index);
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| 121 | OPENSSL_free(ret->qual);
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| 122 | OPENSSL_free(ret);
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| 123 | }
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| 124 | return (NULL);
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| 125 | }
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| 126 |
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| 127 | OPENSSL_STRING *TXT_DB_get_by_index(TXT_DB *db, int idx,
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| 128 | OPENSSL_STRING *value)
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| 129 | {
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| 130 | OPENSSL_STRING *ret;
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| 131 | LHASH_OF(OPENSSL_STRING) *lh;
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| 132 |
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| 133 | if (idx >= db->num_fields) {
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| 134 | db->error = DB_ERROR_INDEX_OUT_OF_RANGE;
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| 135 | return (NULL);
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| 136 | }
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| 137 | lh = db->index[idx];
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| 138 | if (lh == NULL) {
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| 139 | db->error = DB_ERROR_NO_INDEX;
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| 140 | return (NULL);
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| 141 | }
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| 142 | ret = lh_OPENSSL_STRING_retrieve(lh, value);
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| 143 | db->error = DB_ERROR_OK;
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| 144 | return (ret);
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| 145 | }
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| 146 |
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| 147 | int TXT_DB_create_index(TXT_DB *db, int field, int (*qual) (OPENSSL_STRING *),
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| 148 | OPENSSL_LH_HASHFUNC hash, OPENSSL_LH_COMPFUNC cmp)
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| 149 | {
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| 150 | LHASH_OF(OPENSSL_STRING) *idx;
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| 151 | OPENSSL_STRING *r;
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| 152 | int i, n;
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| 153 |
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| 154 | if (field >= db->num_fields) {
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| 155 | db->error = DB_ERROR_INDEX_OUT_OF_RANGE;
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| 156 | return (0);
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| 157 | }
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| 158 | /* FIXME: we lose type checking at this point */
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| 159 | if ((idx = (LHASH_OF(OPENSSL_STRING) *)OPENSSL_LH_new(hash, cmp)) == NULL) {
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| 160 | db->error = DB_ERROR_MALLOC;
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| 161 | return (0);
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| 162 | }
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| 163 | n = sk_OPENSSL_PSTRING_num(db->data);
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| 164 | for (i = 0; i < n; i++) {
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| 165 | r = sk_OPENSSL_PSTRING_value(db->data, i);
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| 166 | if ((qual != NULL) && (qual(r) == 0))
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| 167 | continue;
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| 168 | if ((r = lh_OPENSSL_STRING_insert(idx, r)) != NULL) {
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| 169 | db->error = DB_ERROR_INDEX_CLASH;
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| 170 | db->arg1 = sk_OPENSSL_PSTRING_find(db->data, r);
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| 171 | db->arg2 = i;
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| 172 | lh_OPENSSL_STRING_free(idx);
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| 173 | return (0);
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| 174 | }
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| 175 | }
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| 176 | lh_OPENSSL_STRING_free(db->index[field]);
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| 177 | db->index[field] = idx;
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| 178 | db->qual[field] = qual;
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| 179 | return (1);
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| 180 | }
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| 181 |
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| 182 | long TXT_DB_write(BIO *out, TXT_DB *db)
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| 183 | {
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| 184 | long i, j, n, nn, l, tot = 0;
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| 185 | char *p, **pp, *f;
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| 186 | BUF_MEM *buf = NULL;
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| 187 | long ret = -1;
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| 188 |
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| 189 | if ((buf = BUF_MEM_new()) == NULL)
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| 190 | goto err;
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| 191 | n = sk_OPENSSL_PSTRING_num(db->data);
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| 192 | nn = db->num_fields;
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| 193 | for (i = 0; i < n; i++) {
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| 194 | pp = sk_OPENSSL_PSTRING_value(db->data, i);
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| 195 |
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| 196 | l = 0;
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| 197 | for (j = 0; j < nn; j++) {
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| 198 | if (pp[j] != NULL)
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| 199 | l += strlen(pp[j]);
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| 200 | }
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| 201 | if (!BUF_MEM_grow_clean(buf, (int)(l * 2 + nn)))
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| 202 | goto err;
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| 203 |
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| 204 | p = buf->data;
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| 205 | for (j = 0; j < nn; j++) {
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| 206 | f = pp[j];
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| 207 | if (f != NULL)
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| 208 | for (;;) {
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| 209 | if (*f == '\0')
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| 210 | break;
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| 211 | if (*f == '\t')
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| 212 | *(p++) = '\\';
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| 213 | *(p++) = *(f++);
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| 214 | }
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| 215 | *(p++) = '\t';
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| 216 | }
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| 217 | p[-1] = '\n';
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| 218 | j = p - buf->data;
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| 219 | if (BIO_write(out, buf->data, (int)j) != j)
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| 220 | goto err;
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| 221 | tot += j;
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| 222 | }
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| 223 | ret = tot;
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| 224 | err:
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| 225 | BUF_MEM_free(buf);
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| 226 | return (ret);
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| 227 | }
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| 228 |
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| 229 | int TXT_DB_insert(TXT_DB *db, OPENSSL_STRING *row)
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| 230 | {
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| 231 | int i;
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| 232 | OPENSSL_STRING *r;
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| 233 |
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| 234 | for (i = 0; i < db->num_fields; i++) {
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| 235 | if (db->index[i] != NULL) {
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| 236 | if ((db->qual[i] != NULL) && (db->qual[i] (row) == 0))
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| 237 | continue;
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| 238 | r = lh_OPENSSL_STRING_retrieve(db->index[i], row);
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| 239 | if (r != NULL) {
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| 240 | db->error = DB_ERROR_INDEX_CLASH;
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| 241 | db->arg1 = i;
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| 242 | db->arg_row = r;
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| 243 | goto err;
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| 244 | }
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| 245 | }
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| 246 | }
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| 247 | /* We have passed the index checks, now just append and insert */
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| 248 | if (!sk_OPENSSL_PSTRING_push(db->data, row)) {
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| 249 | db->error = DB_ERROR_MALLOC;
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| 250 | goto err;
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| 251 | }
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| 252 |
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| 253 | for (i = 0; i < db->num_fields; i++) {
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| 254 | if (db->index[i] != NULL) {
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| 255 | if ((db->qual[i] != NULL) && (db->qual[i] (row) == 0))
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| 256 | continue;
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| 257 | (void)lh_OPENSSL_STRING_insert(db->index[i], row);
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| 258 | }
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| 259 | }
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| 260 | return (1);
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| 261 | err:
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| 262 | return (0);
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| 263 | }
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| 264 |
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| 265 | void TXT_DB_free(TXT_DB *db)
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| 266 | {
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| 267 | int i, n;
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| 268 | char **p, *max;
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| 269 |
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| 270 | if (db == NULL)
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| 271 | return;
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| 272 |
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| 273 | if (db->index != NULL) {
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| 274 | for (i = db->num_fields - 1; i >= 0; i--)
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| 275 | lh_OPENSSL_STRING_free(db->index[i]);
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| 276 | OPENSSL_free(db->index);
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| 277 | }
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| 278 | OPENSSL_free(db->qual);
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| 279 | if (db->data != NULL) {
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| 280 | for (i = sk_OPENSSL_PSTRING_num(db->data) - 1; i >= 0; i--) {
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| 281 | /*
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| 282 | * check if any 'fields' have been allocated from outside of the
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| 283 | * initial block
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| 284 | */
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| 285 | p = sk_OPENSSL_PSTRING_value(db->data, i);
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| 286 | max = p[db->num_fields]; /* last address */
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| 287 | if (max == NULL) { /* new row */
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| 288 | for (n = 0; n < db->num_fields; n++)
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| 289 | OPENSSL_free(p[n]);
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| 290 | } else {
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| 291 | for (n = 0; n < db->num_fields; n++) {
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| 292 | if (((p[n] < (char *)p) || (p[n] > max)))
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| 293 | OPENSSL_free(p[n]);
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| 294 | }
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| 295 | }
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| 296 | OPENSSL_free(sk_OPENSSL_PSTRING_value(db->data, i));
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| 297 | }
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| 298 | sk_OPENSSL_PSTRING_free(db->data);
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| 299 | }
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| 300 | OPENSSL_free(db);
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| 301 | }
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