--- /dev/null
+/* 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>
+
+#include "../internal.h"
+
+
+BUF_MEM *BUF_MEM_new(void) {
+ BUF_MEM *ret;
+
+ ret = OPENSSL_malloc(sizeof(BUF_MEM));
+ if (ret == NULL) {
+ OPENSSL_PUT_ERROR(BUF, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ OPENSSL_memset(ret, 0, sizeof(BUF_MEM));
+ return ret;
+}
+
+void BUF_MEM_free(BUF_MEM *buf) {
+ if (buf == NULL) {
+ return;
+ }
+
+ OPENSSL_free(buf->data);
+ OPENSSL_free(buf);
+}
+
+int BUF_MEM_reserve(BUF_MEM *buf, size_t cap) {
+ if (buf->max >= cap) {
+ return 1;
+ }
+
+ size_t n = cap + 3;
+ if (n < cap) {
+ // overflow
+ OPENSSL_PUT_ERROR(BUF, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ n = n / 3;
+ size_t alloc_size = n * 4;
+ if (alloc_size / 4 != n) {
+ // overflow
+ OPENSSL_PUT_ERROR(BUF, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ char *new_buf = OPENSSL_realloc(buf->data, alloc_size);
+ if (new_buf == NULL) {
+ OPENSSL_PUT_ERROR(BUF, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ buf->data = new_buf;
+ buf->max = alloc_size;
+ return 1;
+}
+
+size_t BUF_MEM_grow(BUF_MEM *buf, size_t len) {
+ if (!BUF_MEM_reserve(buf, len)) {
+ return 0;
+ }
+ if (buf->length < len) {
+ OPENSSL_memset(&buf->data[buf->length], 0, len - buf->length);
+ }
+ buf->length = len;
+ return len;
+}
+
+size_t BUF_MEM_grow_clean(BUF_MEM *buf, size_t len) {
+ return BUF_MEM_grow(buf, len);
+}
+
+int BUF_MEM_append(BUF_MEM *buf, const void *in, size_t len) {
+ size_t new_len = buf->length + len;
+ if (new_len < len) {
+ OPENSSL_PUT_ERROR(BUF, ERR_R_OVERFLOW);
+ return 0;
+ }
+ if (!BUF_MEM_reserve(buf, new_len)) {
+ return 0;
+ }
+ OPENSSL_memcpy(buf->data + buf->length, in, len);
+ buf->length = new_len;
+ return 1;
+}
+
+char *BUF_strdup(const char *str) {
+ if (str == NULL) {
+ return NULL;
+ }
+
+ return BUF_strndup(str, strlen(str));
+}
+
+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 *str, size_t size) {
+ char *ret;
+ size_t alloc_size;
+
+ if (str == NULL) {
+ return NULL;
+ }
+
+ size = BUF_strnlen(str, size);
+
+ alloc_size = size + 1;
+ if (alloc_size < size) {
+ // overflow
+ OPENSSL_PUT_ERROR(BUF, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+ ret = OPENSSL_malloc(alloc_size);
+ if (ret == NULL) {
+ OPENSSL_PUT_ERROR(BUF, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ OPENSSL_memcpy(ret, str, 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 size) {
+ if (size == 0) {
+ return NULL;
+ }
+
+ void *ret = OPENSSL_malloc(size);
+ if (ret == NULL) {
+ OPENSSL_PUT_ERROR(BUF, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ OPENSSL_memcpy(ret, data, size);
+ return ret;
+}
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