2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include <openssl/rc2.h>
14 * The input and output encrypted as though 64bit cfb mode is being used.
15 * The extra state information to record how much of the 64bit block we have
16 * used is contained in *num;
19 void RC2_cfb64_encrypt(const unsigned char *in, unsigned char *out,
20 long length, RC2_KEY *schedule, unsigned char *ivec,
21 int *num, int encrypt)
23 register unsigned long v0, v1, t;
24 register int n = *num;
25 register long l = length;
27 unsigned char *iv, c, cc;
29 iv = (unsigned char *)ivec;
37 RC2_encrypt((unsigned long *)ti, schedule);
38 iv = (unsigned char *)ivec;
43 iv = (unsigned char *)ivec;
57 RC2_encrypt((unsigned long *)ti, schedule);
58 iv = (unsigned char *)ivec;
63 iv = (unsigned char *)ivec;
72 v0 = v1 = ti[0] = ti[1] = t = c = cc = 0;