-/* crypto/rc4/rc4_skey.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. 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.]
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
#include <openssl/rc4.h>
#include "rc4_locl.h"
#include <openssl/opensslv.h>
-const char *RC4_version="RC4" OPENSSL_VERSION_PTEXT;
-
const char *RC4_options(void)
- {
-#ifdef RC4_INDEX
- if (sizeof(RC4_INT) == 1)
- return("rc4(idx,char)");
- else
- return("rc4(idx,int)");
-#else
- if (sizeof(RC4_INT) == 1)
- return("rc4(ptr,char)");
- else
- return("rc4(ptr,int)");
-#endif
- }
+{
+ if (sizeof(RC4_INT) == 1)
+ return "rc4(char)";
+ else
+ return "rc4(int)";
+}
-/* RC4 as implemented from a posting from
+/*-
+ * RC4 as implemented from a posting from
* Newsgroups: sci.crypt
- * From: sterndark@netcom.com (David Sterndark)
* Subject: RC4 Algorithm revealed.
* Message-ID: <sternCvKL4B.Hyy@netcom.com>
* Date: Wed, 14 Sep 1994 06:35:31 GMT
*/
void RC4_set_key(RC4_KEY *key, int len, const unsigned char *data)
- {
- register RC4_INT tmp;
- register int id1,id2;
- register RC4_INT *d;
- unsigned int i;
-
- d= &(key->data[0]);
- for (i=0; i<256; i++)
- d[i]=i;
- key->x = 0;
- key->y = 0;
- id1=id2=0;
+{
+ register RC4_INT tmp;
+ register int id1, id2;
+ register RC4_INT *d;
+ unsigned int i;
+
+ d = &(key->data[0]);
+ key->x = 0;
+ key->y = 0;
+ id1 = id2 = 0;
-#define SK_LOOP(n) { \
- tmp=d[(n)]; \
- id2 = (data[id1] + tmp + id2) & 0xff; \
- if (++id1 == len) id1=0; \
- d[(n)]=d[id2]; \
- d[id2]=tmp; }
+#define SK_LOOP(d,n) { \
+ tmp=d[(n)]; \
+ id2 = (data[id1] + tmp + id2) & 0xff; \
+ if (++id1 == len) id1=0; \
+ d[(n)]=d[id2]; \
+ d[id2]=tmp; }
- for (i=0; i < 256; i+=4)
- {
- SK_LOOP(i+0);
- SK_LOOP(i+1);
- SK_LOOP(i+2);
- SK_LOOP(i+3);
- }
- }
-
+ for (i = 0; i < 256; i++)
+ d[i] = i;
+ for (i = 0; i < 256; i += 4) {
+ SK_LOOP(d, i + 0);
+ SK_LOOP(d, i + 1);
+ SK_LOOP(d, i + 2);
+ SK_LOOP(d, i + 3);
+ }
+}
projects / openssl.git / blobdiff