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Diffstat (limited to 'openssl/crypto/buffer/buffer.c')
| -rw-r--r-- | openssl/crypto/buffer/buffer.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/openssl/crypto/buffer/buffer.c b/openssl/crypto/buffer/buffer.c new file mode 100644 index 000000000..b3e947771 --- /dev/null +++ b/openssl/crypto/buffer/buffer.c @@ -0,0 +1,163 @@ +/* crypto/buffer/buffer.c */ +/* 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 <stdio.h> +#include "cryptlib.h" +#include <openssl/buffer.h> + +BUF_MEM *BUF_MEM_new(void) + { + BUF_MEM *ret; + + ret=OPENSSL_malloc(sizeof(BUF_MEM)); + if (ret == NULL) + { + BUFerr(BUF_F_BUF_MEM_NEW,ERR_R_MALLOC_FAILURE); + return(NULL); + } + ret->length=0; + ret->max=0; + ret->data=NULL; + return(ret); + } + +void BUF_MEM_free(BUF_MEM *a) + { + if(a == NULL) + return; + + if (a->data != NULL) + { + memset(a->data,0,(unsigned int)a->max); + OPENSSL_free(a->data); + } + OPENSSL_free(a); + } + +int BUF_MEM_grow(BUF_MEM *str, int len) + { + char *ret; + unsigned int n; + + if (str->length >= len) + { + str->length=len; + return(len); + } + if (str->max >= len) + { + memset(&str->data[str->length],0,len-str->length); + str->length=len; + return(len); + } + n=(len+3)/3*4; + if (str->data == NULL) + ret=OPENSSL_malloc(n); + else + ret=OPENSSL_realloc(str->data,n); + if (ret == NULL) + { + BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE); + len=0; + } + else + { + str->data=ret; + str->max=n; + memset(&str->data[str->length],0,len-str->length); + str->length=len; + } + return(len); + } + +int BUF_MEM_grow_clean(BUF_MEM *str, int len) + { + char *ret; + unsigned int n; + + if (str->length >= len) + { + memset(&str->data[len],0,str->length-len); + str->length=len; + return(len); + } + if (str->max >= len) + { + memset(&str->data[str->length],0,len-str->length); + str->length=len; + return(len); + } + n=(len+3)/3*4; + if (str->data == NULL) + ret=OPENSSL_malloc(n); + else + ret=OPENSSL_realloc_clean(str->data,str->max,n); + if (ret == NULL) + { + BUFerr(BUF_F_BUF_MEM_GROW_CLEAN,ERR_R_MALLOC_FAILURE); + len=0; + } + else + { + str->data=ret; + str->max=n; + memset(&str->data[str->length],0,len-str->length); + str->length=len; + } + return(len); + } |