-/* crypto/stack/stack.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
*
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * 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 "internal/cryptlib.h"
+#include "internal/numbers.h"
#include <openssl/stack.h>
#include <openssl/objects.h>
+#include <errno.h>
+#include <openssl/e_os2.h> /* For ossl_inline */
+
+/*
+ * The initial number of nodes in the array.
+ */
+static const int min_nodes = 4;
+static const int max_nodes = SIZE_MAX / sizeof(void *) < INT_MAX
+ ? (int)(SIZE_MAX / sizeof(void *))
+ : INT_MAX;
struct stack_st {
int num;
- char **data;
+ const void **data;
int sorted;
int num_alloc;
- int (*comp) (const void *, const void *);
+ OPENSSL_sk_compfunc comp;
};
-#undef MIN_NODES
-#define MIN_NODES 4
-
-#include <errno.h>
-
-int (*sk_set_cmp_func(_STACK *sk, int (*c) (const void *, const void *)))
- (const void *, const void *) {
- int (*old) (const void *, const void *) = sk->comp;
+OPENSSL_sk_compfunc OPENSSL_sk_set_cmp_func(OPENSSL_STACK *sk, OPENSSL_sk_compfunc c)
+{
+ OPENSSL_sk_compfunc old = sk->comp;
if (sk->comp != c)
sk->sorted = 0;
return old;
}
-_STACK *sk_dup(_STACK *sk)
+OPENSSL_STACK *OPENSSL_sk_dup(const OPENSSL_STACK *sk)
{
- _STACK *ret;
- char **s;
+ OPENSSL_STACK *ret;
- if ((ret = sk_new(sk->comp)) == NULL)
- goto err;
- s = OPENSSL_realloc((char *)ret->data,
- (unsigned int)sizeof(char *) * sk->num_alloc);
- if (s == NULL)
- goto err;
- ret->data = s;
+ if (sk->num < 0)
+ return NULL;
- ret->num = sk->num;
- memcpy(ret->data, sk->data, sizeof(char *) * sk->num);
- ret->sorted = sk->sorted;
- ret->num_alloc = sk->num_alloc;
- ret->comp = sk->comp;
- return (ret);
+ if ((ret = OPENSSL_malloc(sizeof(*ret))) == NULL)
+ return NULL;
+
+ /* direct structure assignment */
+ *ret = *sk;
+
+ if ((ret->data = OPENSSL_malloc(sizeof(*ret->data) * sk->num_alloc)) == NULL)
+ goto err;
+ memcpy(ret->data, sk->data, sizeof(void *) * sk->num);
+ return ret;
err:
- sk_free(ret);
- return (NULL);
+ OPENSSL_sk_free(ret);
+ return NULL;
}
-_STACK *sk_deep_copy(_STACK *sk, void *(*copy_func) (void *),
- void (*free_func) (void *))
+OPENSSL_STACK *OPENSSL_sk_deep_copy(const OPENSSL_STACK *sk,
+ OPENSSL_sk_copyfunc copy_func,
+ OPENSSL_sk_freefunc free_func)
{
- _STACK *ret;
+ OPENSSL_STACK *ret;
int i;
- if ((ret = OPENSSL_malloc(sizeof(_STACK))) == NULL)
- return ret;
- ret->comp = sk->comp;
- ret->sorted = sk->sorted;
- ret->num = sk->num;
- ret->num_alloc = sk->num > MIN_NODES ? sk->num : MIN_NODES;
- ret->data = OPENSSL_malloc(sizeof(*ret->data) * ret->num_alloc);
+ if (sk->num < 0)
+ return NULL;
+
+ if ((ret = OPENSSL_malloc(sizeof(*ret))) == NULL)
+ return NULL;
+
+ /* direct structure assignment */
+ *ret = *sk;
+
+ ret->num_alloc = sk->num > min_nodes ? sk->num : min_nodes;
+ ret->data = OPENSSL_zalloc(sizeof(*ret->data) * ret->num_alloc);
if (ret->data == NULL) {
OPENSSL_free(ret);
return NULL;
}
- for (i = 0; i < ret->num_alloc; i++)
- ret->data[i] = NULL;
for (i = 0; i < ret->num; ++i) {
if (sk->data[i] == NULL)
if ((ret->data[i] = copy_func(sk->data[i])) == NULL) {
while (--i >= 0)
if (ret->data[i] != NULL)
- free_func(ret->data[i]);
- sk_free(ret);
+ free_func((void *)ret->data[i]);
+ OPENSSL_sk_free(ret);
return NULL;
}
}
return ret;
}
-_STACK *sk_new_null(void)
+OPENSSL_STACK *OPENSSL_sk_new_null(void)
{
- return sk_new((int (*)(const void *, const void *))0);
+ return OPENSSL_sk_new((OPENSSL_sk_compfunc)NULL);
}
-_STACK *sk_new(int (*c) (const void *, const void *))
+OPENSSL_STACK *OPENSSL_sk_new(OPENSSL_sk_compfunc c)
{
- _STACK *ret;
- int i;
+ OPENSSL_STACK *ret;
- if ((ret = OPENSSL_malloc(sizeof(_STACK))) == NULL)
+ if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL)
goto err;
- if ((ret->data = OPENSSL_malloc(sizeof(*ret->data) * MIN_NODES)) == NULL)
+ if ((ret->data = OPENSSL_zalloc(sizeof(*ret->data) * min_nodes)) == NULL)
goto err;
- for (i = 0; i < MIN_NODES; i++)
- ret->data[i] = NULL;
ret->comp = c;
- ret->num_alloc = MIN_NODES;
- ret->num = 0;
- ret->sorted = 0;
+ ret->num_alloc = min_nodes;
return (ret);
+
err:
OPENSSL_free(ret);
return (NULL);
}
-int sk_insert(_STACK *st, void *data, int loc)
+/*
+ * Calculate the array growth based on the target size.
+ *
+ * The growth faction is a rational number and is defined by a numerator
+ * and a denominator. According to Andrew Koenig in his paper "Why Are
+ * Vectors Efficient?" from JOOP 11(5) 1998, this factor should be less
+ * than the golden ratio (1.618...).
+ *
+ * We use 3/2 = 1.5 for simplicty of calculation and overflow checking.
+ * Another option 8/5 = 1.6 allows for slightly faster growth, although safe
+ * computation is more difficult.
+ *
+ * The limit to avoid overflow is spot on. The modulo three correction term
+ * ensures that the limit is the largest number than can be expanded by the
+ * growth factor without exceeding the hard limit.
+ */
+static ossl_inline int compute_growth(int target, int current)
{
- char **s;
+ const int limit = (max_nodes / 3) * 2 + (max_nodes % 3 ? 1 : 0);
- if (st == NULL)
+ while (current < target) {
+ /* Check to see if we're at the hard limit */
+ if (current >= max_nodes)
+ return 0;
+
+ /* Expand the size by a factor of 3/2 if it is within range */
+ current = current < limit ? current + current / 2 : max_nodes;
+ }
+ return current;
+}
+
+static int sk_reserve(OPENSSL_STACK *st, int n, int exact)
+{
+ const void **tmpdata;
+ int num_alloc;
+
+ /* Check to see the reservation isn't exceeding the hard limit */
+ if (n > max_nodes - st->num)
return 0;
- if (st->num_alloc <= st->num + 1) {
- s = OPENSSL_realloc((char *)st->data,
- (unsigned int)sizeof(char *) * st->num_alloc * 2);
- if (s == NULL)
- return (0);
- st->data = s;
- st->num_alloc *= 2;
+
+ /* Figure out the new size */
+ num_alloc = st->num + n;
+ if (num_alloc < min_nodes)
+ num_alloc = min_nodes;
+
+ if (!exact) {
+ if (num_alloc <= st->num_alloc)
+ return 1;
+ num_alloc = compute_growth(num_alloc, st->num_alloc);
+ if (num_alloc == 0)
+ return 0;
+ } else if (num_alloc == st->num_alloc) {
+ return 1;
}
- if ((loc >= (int)st->num) || (loc < 0))
+
+ tmpdata = OPENSSL_realloc((void *)st->data, sizeof(void *) * num_alloc);
+ if (tmpdata == NULL)
+ return 0;
+
+ st->data = tmpdata;
+ st->num_alloc = num_alloc;
+ return 1;
+}
+
+int OPENSSL_sk_reserve(OPENSSL_STACK *st, int n)
+{
+ if (st == NULL || st->num < 0)
+ return 0;
+
+ if (n < 0)
+ return 1;
+ return sk_reserve(st, n, 1);
+}
+
+int OPENSSL_sk_insert(OPENSSL_STACK *st, const void *data, int loc)
+{
+ if (st == NULL || st->num < 0 || st->num == max_nodes)
+ return 0;
+
+ if (!sk_reserve(st, 1, 0))
+ return 0;
+
+ if ((loc >= st->num) || (loc < 0)) {
st->data[st->num] = data;
- else {
- memmove(&(st->data[loc + 1]),
- &(st->data[loc]), sizeof(char *) * (st->num - loc));
+ } else {
+ memmove(&st->data[loc + 1], &st->data[loc],
+ sizeof(st->data[0]) * (st->num - loc));
st->data[loc] = data;
}
st->num++;
st->sorted = 0;
- return (st->num);
+ return st->num;
}
-void *sk_delete_ptr(_STACK *st, void *p)
+void *OPENSSL_sk_delete_ptr(OPENSSL_STACK *st, const void *p)
{
int i;
for (i = 0; i < st->num; i++)
if (st->data[i] == p)
- return (sk_delete(st, i));
- return (NULL);
+ return OPENSSL_sk_delete(st, i);
+ return NULL;
}
-void *sk_delete(_STACK *st, int loc)
+void *OPENSSL_sk_delete(OPENSSL_STACK *st, int loc)
{
- char *ret;
- int i, j;
+ const void *ret;
- if (!st || (loc < 0) || (loc >= st->num))
+ if (st == NULL || loc < 0 || loc >= st->num)
return NULL;
ret = st->data[loc];
- if (loc != st->num - 1) {
- j = st->num - 1;
- for (i = loc; i < j; i++)
- st->data[i] = st->data[i + 1];
- /*
- * In theory memcpy is not safe for this memcpy( &(st->data[loc]),
- * &(st->data[loc+1]), sizeof(char *)*(st->num-loc-1));
- */
- }
+ if (loc != st->num - 1)
+ memmove(&st->data[loc], &st->data[loc + 1],
+ sizeof(st->data[0]) * (st->num - loc - 1));
st->num--;
- return (ret);
+ return (void *)ret;
}
-static int internal_find(_STACK *st, void *data, int ret_val_options)
+static int internal_find(OPENSSL_STACK *st, const void *data,
+ int ret_val_options)
{
- const void *const *r;
+ const void *r;
int i;
if (st == NULL)
return (i);
return (-1);
}
- sk_sort(st);
+ OPENSSL_sk_sort(st);
if (data == NULL)
return (-1);
r = OBJ_bsearch_ex_(&data, st->data, st->num, sizeof(void *), st->comp,
ret_val_options);
if (r == NULL)
return (-1);
- return (int)((char **)r - st->data);
+ return (int)((const void **)r - st->data);
}
-int sk_find(_STACK *st, void *data)
+int OPENSSL_sk_find(OPENSSL_STACK *st, const void *data)
{
return internal_find(st, data, OBJ_BSEARCH_FIRST_VALUE_ON_MATCH);
}
-int sk_find_ex(_STACK *st, void *data)
+int OPENSSL_sk_find_ex(OPENSSL_STACK *st, const void *data)
{
return internal_find(st, data, OBJ_BSEARCH_VALUE_ON_NOMATCH);
}
-int sk_push(_STACK *st, void *data)
+int OPENSSL_sk_push(OPENSSL_STACK *st, const void *data)
{
- return (sk_insert(st, data, st->num));
+ return (OPENSSL_sk_insert(st, data, st->num));
}
-int sk_unshift(_STACK *st, void *data)
+int OPENSSL_sk_unshift(OPENSSL_STACK *st, const void *data)
{
- return (sk_insert(st, data, 0));
+ return (OPENSSL_sk_insert(st, data, 0));
}
-void *sk_shift(_STACK *st)
+void *OPENSSL_sk_shift(OPENSSL_STACK *st)
{
if (st == NULL)
return (NULL);
if (st->num <= 0)
return (NULL);
- return (sk_delete(st, 0));
+ return (OPENSSL_sk_delete(st, 0));
}
-void *sk_pop(_STACK *st)
+void *OPENSSL_sk_pop(OPENSSL_STACK *st)
{
if (st == NULL)
return (NULL);
if (st->num <= 0)
return (NULL);
- return (sk_delete(st, st->num - 1));
+ return (OPENSSL_sk_delete(st, st->num - 1));
}
-void sk_zero(_STACK *st)
+void OPENSSL_sk_zero(OPENSSL_STACK *st)
{
if (st == NULL)
return;
st->num = 0;
}
-void sk_pop_free(_STACK *st, void (*func) (void *))
+void OPENSSL_sk_pop_free(OPENSSL_STACK *st, OPENSSL_sk_freefunc func)
{
int i;
return;
for (i = 0; i < st->num; i++)
if (st->data[i] != NULL)
- func(st->data[i]);
- sk_free(st);
+ func((char *)st->data[i]);
+ OPENSSL_sk_free(st);
}
-void sk_free(_STACK *st)
+void OPENSSL_sk_free(OPENSSL_STACK *st)
{
if (st == NULL)
return;
OPENSSL_free(st);
}
-int sk_num(const _STACK *st)
+int OPENSSL_sk_num(const OPENSSL_STACK *st)
{
if (st == NULL)
return -1;
return st->num;
}
-void *sk_value(const _STACK *st, int i)
+void *OPENSSL_sk_value(const OPENSSL_STACK *st, int i)
{
- if (!st || (i < 0) || (i >= st->num))
+ if (st == NULL || i < 0 || i >= st->num)
return NULL;
- return st->data[i];
+ return (void *)st->data[i];
}
-void *sk_set(_STACK *st, int i, void *value)
+void *OPENSSL_sk_set(OPENSSL_STACK *st, int i, const void *data)
{
- if (!st || (i < 0) || (i >= st->num))
+ if (st == NULL || i < 0 || i >= st->num)
return NULL;
- return (st->data[i] = value);
+ st->data[i] = data;
+ return (void *)st->data[i];
}
-void sk_sort(_STACK *st)
+void OPENSSL_sk_sort(OPENSSL_STACK *st)
{
- if (st && !st->sorted) {
- int (*comp_func) (const void *, const void *);
-
- /*
- * same comment as in sk_find ... previously st->comp was declared as
- * a (void*,void*) callback type, but this made the population of the
- * callback pointer illogical - our callbacks compare type** with
- * type**, so we leave the casting until absolutely necessary (ie.
- * "now").
- */
- comp_func = (int (*)(const void *, const void *))(st->comp);
- qsort(st->data, st->num, sizeof(char *), comp_func);
+ if (st && !st->sorted && st->comp != NULL) {
+ qsort(st->data, st->num, sizeof(void *), st->comp);
st->sorted = 1;
}
}
-int sk_is_sorted(const _STACK *st)
+int OPENSSL_sk_is_sorted(const OPENSSL_STACK *st)
{
- if (!st)
+ if (st == NULL)
return 1;
return st->sorted;
}
projects / openssl.git / blobdiff