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- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * 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.] */
-
- #include <openssl/buf.h>
-
- #include <string.h>
-
- #include <openssl/mem.h>
- #include <openssl/err.h>
-
-
- BUF_MEM *BUF_MEM_new(void) {
- BUF_MEM *ret;
-
- ret = OPENSSL_malloc(sizeof(BUF_MEM));
- if (ret == NULL) {
- OPENSSL_PUT_ERROR(BUF, BUF_MEM_new, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
-
- memset(ret, 0, sizeof(BUF_MEM));
- return ret;
- }
-
- void BUF_MEM_free(BUF_MEM *buf) {
- if (buf == NULL) {
- return;
- }
-
- if (buf->data != NULL) {
- OPENSSL_cleanse(buf->data, buf->max);
- OPENSSL_free(buf->data);
- }
-
- OPENSSL_free(buf);
- }
-
- static size_t buf_mem_grow(BUF_MEM *buf, size_t len, char clean) {
- char *new_buf;
- size_t n, alloc_size;
-
- if (buf->length >= len) {
- buf->length = len;
- return len;
- }
- if (buf->max >= len) {
- memset(&buf->data[buf->length], 0, len - buf->length);
- buf->length = len;
- return len;
- }
-
- n = len + 3;
- if (n < len) {
- /* overflow */
- OPENSSL_PUT_ERROR(BUF, buf_mem_grow, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- n = n / 3;
- alloc_size = n * 4;
- if (alloc_size / 4 != n) {
- /* overflow */
- OPENSSL_PUT_ERROR(BUF, buf_mem_grow, ERR_R_MALLOC_FAILURE);
- return 0;
- }
-
- if (buf->data == NULL) {
- new_buf = OPENSSL_malloc(alloc_size);
- } else {
- if (clean) {
- new_buf = OPENSSL_realloc_clean(buf->data, buf->max, alloc_size);
- } else {
- new_buf = OPENSSL_realloc(buf->data, alloc_size);
- }
- }
-
- if (new_buf == NULL) {
- OPENSSL_PUT_ERROR(BUF, buf_mem_grow, ERR_R_MALLOC_FAILURE);
- len = 0;
- } else {
- buf->data = new_buf;
- buf->max = alloc_size;
- memset(&buf->data[buf->length], 0, len - buf->length);
- buf->length = len;
- }
-
- return len;
- }
-
- size_t BUF_MEM_grow(BUF_MEM *buf, size_t len) {
- return buf_mem_grow(buf, len, 0 /* don't clear old buffer contents. */);
- }
-
- size_t BUF_MEM_grow_clean(BUF_MEM *buf, size_t len) {
- return buf_mem_grow(buf, len, 1 /* clear old buffer contents. */);
- }
-
- char *BUF_strdup(const char *buf) {
- if (buf == NULL) {
- return NULL;
- }
-
- return BUF_strndup(buf, strlen(buf));
- }
-
- size_t BUF_strnlen(const char *str, size_t max_len) {
- size_t i;
-
- for (i = 0; i < max_len; i++) {
- if (str[i] == 0) {
- break;
- }
- }
-
- return i;
- }
-
- char *BUF_strndup(const char *buf, size_t size) {
- char *ret;
- size_t alloc_size;
-
- if (buf == NULL) {
- return NULL;
- }
-
- size = BUF_strnlen(buf, size);
-
- alloc_size = size + 1;
- if (alloc_size < size) {
- /* overflow */
- OPENSSL_PUT_ERROR(BUF, BUF_strndup, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- ret = OPENSSL_malloc(alloc_size);
- if (ret == NULL) {
- OPENSSL_PUT_ERROR(BUF, BUF_strndup, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
-
- memcpy(ret, buf, size);
- ret[size] = '\0';
- return ret;
- }
-
- size_t BUF_strlcpy(char *dst, const char *src, size_t dst_size) {
- size_t l = 0;
-
- for (; dst_size > 1 && *src; dst_size--) {
- *dst++ = *src++;
- l++;
- }
-
- if (dst_size) {
- *dst = 0;
- }
-
- return l + strlen(src);
- }
-
- size_t BUF_strlcat(char *dst, const char *src, size_t dst_size) {
- size_t l = 0;
- for (; dst_size > 0 && *dst; dst_size--, dst++) {
- l++;
- }
- return l + BUF_strlcpy(dst, src, dst_size);
- }
-
- void *BUF_memdup(const void *data, size_t dst_size) {
- void *ret;
-
- if (data == NULL) {
- return NULL;
- }
-
- ret = OPENSSL_malloc(dst_size);
- if (ret == NULL) {
- OPENSSL_PUT_ERROR(BUF, BUF_memdup, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
-
- memcpy(ret, data, dst_size);
- return ret;
- }
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