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| /*
| * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
| *
| * 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 "des_local.h"
|
| /*
| * The input and output encrypted as though 64bit ofb mode is being used.
| * The extra state information to record how much of the 64bit block we have
| * used is contained in *num;
| */
| void DES_ede3_ofb64_encrypt(register const unsigned char *in,
| register unsigned char *out, long length,
| DES_key_schedule *k1, DES_key_schedule *k2,
| DES_key_schedule *k3, DES_cblock *ivec, int *num)
| {
| register DES_LONG v0, v1;
| register int n = *num;
| register long l = length;
| DES_cblock d;
| register char *dp;
| DES_LONG ti[2];
| unsigned char *iv;
| int save = 0;
|
| iv = &(*ivec)[0];
| c2l(iv, v0);
| c2l(iv, v1);
| ti[0] = v0;
| ti[1] = v1;
| dp = (char *)d;
| l2c(v0, dp);
| l2c(v1, dp);
| while (l--) {
| if (n == 0) {
| /* ti[0]=v0; */
| /* ti[1]=v1; */
| DES_encrypt3(ti, k1, k2, k3);
| v0 = ti[0];
| v1 = ti[1];
|
| dp = (char *)d;
| l2c(v0, dp);
| l2c(v1, dp);
| save++;
| }
| *(out++) = *(in++) ^ d[n];
| n = (n + 1) & 0x07;
| }
| if (save) {
| iv = &(*ivec)[0];
| l2c(v0, iv);
| l2c(v1, iv);
| }
| v0 = v1 = ti[0] = ti[1] = 0;
| *num = n;
| }
|
|
