A local copy of OpenSSL from GitHub
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/*
* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/txt_db.h>
#undef BUFSIZE
#define BUFSIZE 512
TXT_DB *TXT_DB_read(BIO *in, int num)
{
TXT_DB *ret = NULL;
int esc = 0;
long ln = 0;
int i, add, n;
int size = BUFSIZE;
int offset = 0;
char *p, *f;
OPENSSL_STRING *pp;
BUF_MEM *buf = NULL;
if ((buf = BUF_MEM_new()) == NULL)
goto err;
if (!BUF_MEM_grow(buf, size))
goto err;
if ((ret = OPENSSL_malloc(sizeof(*ret))) == NULL)
goto err;
ret->num_fields = num;
ret->index = NULL;
ret->qual = NULL;
if ((ret->data = sk_OPENSSL_PSTRING_new_null()) == NULL)
goto err;
if ((ret->index = OPENSSL_malloc(sizeof(*ret->index) * num)) == NULL)
goto err;
if ((ret->qual = OPENSSL_malloc(sizeof(*(ret->qual)) * num)) == NULL)
goto err;
for (i = 0; i < num; i++) {
ret->index[i] = NULL;
ret->qual[i] = NULL;
}
add = (num + 1) * sizeof(char *);
buf->data[size - 1] = '\0';
offset = 0;
for (;;) {
if (offset != 0) {
size += BUFSIZE;
if (!BUF_MEM_grow_clean(buf, size))
goto err;
}
buf->data[offset] = '\0';
BIO_gets(in, &(buf->data[offset]), size - offset);
ln++;
if (buf->data[offset] == '\0')
break;
if ((offset == 0) && (buf->data[0] == '#'))
continue;
i = strlen(&(buf->data[offset]));
offset += i;
if (buf->data[offset - 1] != '\n')
continue;
else {
buf->data[offset - 1] = '\0'; /* blat the '\n' */
if ((p = OPENSSL_malloc(add + offset)) == NULL)
goto err;
offset = 0;
}
pp = (char **)p;
p += add;
n = 0;
pp[n++] = p;
i = 0;
f = buf->data;
esc = 0;
for (;;) {
if (*f == '\0')
break;
if (*f == '\t') {
if (esc)
p--;
else {
*(p++) = '\0';
f++;
if (n >= num)
break;
pp[n++] = p;
continue;
}
}
esc = (*f == '\\');
*(p++) = *(f++);
}
*(p++) = '\0';
if ((n != num) || (*f != '\0')) {
ret->error = DB_ERROR_WRONG_NUM_FIELDS;
goto err;
}
pp[n] = p;
if (!sk_OPENSSL_PSTRING_push(ret->data, pp))
goto err;
}
BUF_MEM_free(buf);
return ret;
err:
BUF_MEM_free(buf);
if (ret != NULL) {
sk_OPENSSL_PSTRING_free(ret->data);
OPENSSL_free(ret->index);
OPENSSL_free(ret->qual);
OPENSSL_free(ret);
}
return (NULL);
}
OPENSSL_STRING *TXT_DB_get_by_index(TXT_DB *db, int idx,
OPENSSL_STRING *value)
{
OPENSSL_STRING *ret;
LHASH_OF(OPENSSL_STRING) *lh;
if (idx >= db->num_fields) {
db->error = DB_ERROR_INDEX_OUT_OF_RANGE;
return (NULL);
}
lh = db->index[idx];
if (lh == NULL) {
db->error = DB_ERROR_NO_INDEX;
return (NULL);
}
ret = lh_OPENSSL_STRING_retrieve(lh, value);
db->error = DB_ERROR_OK;
return (ret);
}
int TXT_DB_create_index(TXT_DB *db, int field, int (*qual) (OPENSSL_STRING *),
LHASH_HASH_FN_TYPE hash, LHASH_COMP_FN_TYPE cmp)
{
LHASH_OF(OPENSSL_STRING) *idx;
OPENSSL_STRING *r;
int i, n;
if (field >= db->num_fields) {
db->error = DB_ERROR_INDEX_OUT_OF_RANGE;
return (0);
}
/* FIXME: we lose type checking at this point */
if ((idx = (LHASH_OF(OPENSSL_STRING) *)lh_new(hash, cmp)) == NULL) {
db->error = DB_ERROR_MALLOC;
return (0);
}
n = sk_OPENSSL_PSTRING_num(db->data);
for (i = 0; i < n; i++) {
r = sk_OPENSSL_PSTRING_value(db->data, i);
if ((qual != NULL) && (qual(r) == 0))
continue;
if ((r = lh_OPENSSL_STRING_insert(idx, r)) != NULL) {
db->error = DB_ERROR_INDEX_CLASH;
db->arg1 = sk_OPENSSL_PSTRING_find(db->data, r);
db->arg2 = i;
lh_OPENSSL_STRING_free(idx);
return (0);
}
}
lh_OPENSSL_STRING_free(db->index[field]);
db->index[field] = idx;
db->qual[field] = qual;
return (1);
}
long TXT_DB_write(BIO *out, TXT_DB *db)
{
long i, j, n, nn, l, tot = 0;
char *p, **pp, *f;
BUF_MEM *buf = NULL;
long ret = -1;
if ((buf = BUF_MEM_new()) == NULL)
goto err;
n = sk_OPENSSL_PSTRING_num(db->data);
nn = db->num_fields;
for (i = 0; i < n; i++) {
pp = sk_OPENSSL_PSTRING_value(db->data, i);
l = 0;
for (j = 0; j < nn; j++) {
if (pp[j] != NULL)
l += strlen(pp[j]);
}
if (!BUF_MEM_grow_clean(buf, (int)(l * 2 + nn)))
goto err;
p = buf->data;
for (j = 0; j < nn; j++) {
f = pp[j];
if (f != NULL)
for (;;) {
if (*f == '\0')
break;
if (*f == '\t')
*(p++) = '\\';
*(p++) = *(f++);
}
*(p++) = '\t';
}
p[-1] = '\n';
j = p - buf->data;
if (BIO_write(out, buf->data, (int)j) != j)
goto err;
tot += j;
}
ret = tot;
err:
BUF_MEM_free(buf);
return (ret);
}
int TXT_DB_insert(TXT_DB *db, OPENSSL_STRING *row)
{
int i;
OPENSSL_STRING *r;
for (i = 0; i < db->num_fields; i++) {
if (db->index[i] != NULL) {
if ((db->qual[i] != NULL) && (db->qual[i] (row) == 0))
continue;
r = lh_OPENSSL_STRING_retrieve(db->index[i], row);
if (r != NULL) {
db->error = DB_ERROR_INDEX_CLASH;
db->arg1 = i;
db->arg_row = r;
goto err;
}
}
}
/* We have passed the index checks, now just append and insert */
if (!sk_OPENSSL_PSTRING_push(db->data, row)) {
db->error = DB_ERROR_MALLOC;
goto err;
}
for (i = 0; i < db->num_fields; i++) {
if (db->index[i] != NULL) {
if ((db->qual[i] != NULL) && (db->qual[i] (row) == 0))
continue;
(void)lh_OPENSSL_STRING_insert(db->index[i], row);
}
}
return (1);
err:
return (0);
}
void TXT_DB_free(TXT_DB *db)
{
int i, n;
char **p, *max;
if (db == NULL)
return;
if (db->index != NULL) {
for (i = db->num_fields - 1; i >= 0; i--)
lh_OPENSSL_STRING_free(db->index[i]);
OPENSSL_free(db->index);
}
OPENSSL_free(db->qual);
if (db->data != NULL) {
for (i = sk_OPENSSL_PSTRING_num(db->data) - 1; i >= 0; i--) {
/*
* check if any 'fields' have been allocated from outside of the
* initial block
*/
p = sk_OPENSSL_PSTRING_value(db->data, i);
max = p[db->num_fields]; /* last address */
if (max == NULL) { /* new row */
for (n = 0; n < db->num_fields; n++)
OPENSSL_free(p[n]);
} else {
for (n = 0; n < db->num_fields; n++) {
if (((p[n] < (char *)p) || (p[n] > max)))
OPENSSL_free(p[n]);
}
}
OPENSSL_free(sk_OPENSSL_PSTRING_value(db->data, i));
}
sk_OPENSSL_PSTRING_free(db->data);
}
OPENSSL_free(db);
}