-/* crypto/rc5/rc5_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 OpenSSL license (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/rc5.h>
#include "rc5_locl.h"
-void RC5_32_set_key(RC5_32_KEY *key, int len, unsigned char *data,
- int rounds)
- {
- RC5_32_INT L[64],l,ll,A,B,*S,k;
- int i,j,m,c,t,ii,jj;
+void RC5_32_set_key(RC5_32_KEY *key, int len, const unsigned char *data,
+ int rounds)
+{
+ RC5_32_INT L[64], l, ll, A, B, *S, k;
+ int i, j, m, c, t, ii, jj;
- if ( (rounds != RC5_16_ROUNDS) &&
- (rounds != RC5_12_ROUNDS) &&
- (rounds != RC5_8_ROUNDS))
- rounds=RC5_16_ROUNDS;
+ if ((rounds != RC5_16_ROUNDS) &&
+ (rounds != RC5_12_ROUNDS) && (rounds != RC5_8_ROUNDS))
+ rounds = RC5_16_ROUNDS;
- key->rounds=rounds;
- S= &(key->data[0]);
- j=0;
- for (i=0; i<=(len-8); i+=8)
- {
- c2l(data,l);
- L[j++]=l;
- c2l(data,l);
- L[j++]=l;
- }
- ii=len-i;
- if (ii)
- {
- k=len&0x07;
- c2ln(data,l,ll,k);
- L[j+0]=l;
- L[j+1]=ll;
- }
+ key->rounds = rounds;
+ S = &(key->data[0]);
+ j = 0;
+ for (i = 0; i <= (len - 8); i += 8) {
+ c2l(data, l);
+ L[j++] = l;
+ c2l(data, l);
+ L[j++] = l;
+ }
+ ii = len - i;
+ if (ii) {
+ k = len & 0x07;
+ c2ln(data, l, ll, k);
+ L[j + 0] = l;
+ L[j + 1] = ll;
+ }
- c=(len+3)/4;
- t=(rounds+1)*2;
- S[0]=RC5_32_P;
- for (i=1; i<t; i++)
- S[i]=(S[i-1]+RC5_32_Q)&RC5_32_MASK;
-
- j=(t>c)?t:c;
- j*=3;
- ii=jj=0;
- A=B=0;
- for (i=0; i<j; i++)
- {
- k=(S[ii]+A+B)&RC5_32_MASK;
- A=S[ii]=ROTATE_l32(k,3);
- m=(int)(A+B);
- k=(L[jj]+A+B)&RC5_32_MASK;
- B=L[jj]=ROTATE_l32(k,m);
- if (++ii >= t) ii=0;
- if (++jj >= c) jj=0;
- }
- }
+ c = (len + 3) / 4;
+ t = (rounds + 1) * 2;
+ S[0] = RC5_32_P;
+ for (i = 1; i < t; i++)
+ S[i] = (S[i - 1] + RC5_32_Q) & RC5_32_MASK;
+ j = (t > c) ? t : c;
+ j *= 3;
+ ii = jj = 0;
+ A = B = 0;
+ for (i = 0; i < j; i++) {
+ k = (S[ii] + A + B) & RC5_32_MASK;
+ A = S[ii] = ROTATE_l32(k, 3);
+ m = (int)(A + B);
+ k = (L[jj] + A + B) & RC5_32_MASK;
+ B = L[jj] = ROTATE_l32(k, m);
+ if (++ii >= t)
+ ii = 0;
+ if (++jj >= c)
+ jj = 0;
+ }
+}
projects / openssl.git / blobdiff