1 files changed, 203 insertions, 0 deletions

diff --git a/src/lib/libcrypto/buffer/buffer.c b/src/lib/libcrypto/buffer/buffer.c
new file mode 100644
index 0000000000..d7aa79ad7f
--- /dev/null
+++ b/src/lib/libcrypto/buffer/buffer.c
@@ -0,0 +1,203 @@
+/* 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>
+
+/* LIMIT_BEFORE_EXPANSION is the maximum n such that (n+3)/3*4 < 2**31. That
+ * function is applied in several functions in this file and this limit ensures
+ * that the result fits in an int. */
+#define LIMIT_BEFORE_EXPANSION 0x5ffffffc
+
+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, size_t len)
+        {
+        char *ret;
+        size_t 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);
+                }
+        /* This limit is sufficient to ensure (len+3)/3*4 < 2**31 */
+        if (len > LIMIT_BEFORE_EXPANSION)
+                {
+                BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE);
+                return 0;
+                }
+        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, size_t len)
+        {
+        char *ret;
+        size_t 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);
+                }
+        /* This limit is sufficient to ensure (len+3)/3*4 < 2**31 */
+        if (len > LIMIT_BEFORE_EXPANSION)
+                {
+                BUFerr(BUF_F_BUF_MEM_GROW_CLEAN,ERR_R_MALLOC_FAILURE);
+                return 0;
+                }
+        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);
+        }
+
+void BUF_reverse(unsigned char *out, unsigned char *in, size_t size)
+        {
+        size_t i;
+        if (in)
+                {
+                out += size - 1;
+                for (i = 0; i < size; i++)
+                        *in++ = *out--;
+                }
+        else
+                {
+                unsigned char *q;
+                char c;
+                q = out + size - 1;
+                for (i = 0; i < size/2; i++)
+                        {
+                        c = *q;
+                        *q-- = *out;
+                        *out++ = c;
+                        }
+                }
+        }