| /* 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, 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, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| n = n / 3; |
| alloc_size = n * 4; |
| if (alloc_size / 4 != n) { |
| /* overflow */ |
| OPENSSL_PUT_ERROR(BUF, 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, 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, ERR_R_MALLOC_FAILURE); |
| return NULL; |
| } |
| ret = OPENSSL_malloc(alloc_size); |
| if (ret == NULL) { |
| OPENSSL_PUT_ERROR(BUF, 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 (dst_size == 0) { |
| return NULL; |
| } |
| |
| ret = OPENSSL_malloc(dst_size); |
| if (ret == NULL) { |
| OPENSSL_PUT_ERROR(BUF, ERR_R_MALLOC_FAILURE); |
| return NULL; |
| } |
| |
| memcpy(ret, data, dst_size); |
| return ret; |
| } |