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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 <openssl/idea.h>
| #include "idea_local.h"
|
| void IDEA_cbc_encrypt(const unsigned char *in, unsigned char *out,
| long length, IDEA_KEY_SCHEDULE *ks, unsigned char *iv,
| int encrypt)
| {
| register unsigned long tin0, tin1;
| register unsigned long tout0, tout1, xor0, xor1;
| register long l = length;
| unsigned long tin[2];
|
| if (encrypt) {
| n2l(iv, tout0);
| n2l(iv, tout1);
| iv -= 8;
| for (l -= 8; l >= 0; l -= 8) {
| n2l(in, tin0);
| n2l(in, tin1);
| tin0 ^= tout0;
| tin1 ^= tout1;
| tin[0] = tin0;
| tin[1] = tin1;
| IDEA_encrypt(tin, ks);
| tout0 = tin[0];
| l2n(tout0, out);
| tout1 = tin[1];
| l2n(tout1, out);
| }
| if (l != -8) {
| n2ln(in, tin0, tin1, l + 8);
| tin0 ^= tout0;
| tin1 ^= tout1;
| tin[0] = tin0;
| tin[1] = tin1;
| IDEA_encrypt(tin, ks);
| tout0 = tin[0];
| l2n(tout0, out);
| tout1 = tin[1];
| l2n(tout1, out);
| }
| l2n(tout0, iv);
| l2n(tout1, iv);
| } else {
| n2l(iv, xor0);
| n2l(iv, xor1);
| iv -= 8;
| for (l -= 8; l >= 0; l -= 8) {
| n2l(in, tin0);
| tin[0] = tin0;
| n2l(in, tin1);
| tin[1] = tin1;
| IDEA_encrypt(tin, ks);
| tout0 = tin[0] ^ xor0;
| tout1 = tin[1] ^ xor1;
| l2n(tout0, out);
| l2n(tout1, out);
| xor0 = tin0;
| xor1 = tin1;
| }
| if (l != -8) {
| n2l(in, tin0);
| tin[0] = tin0;
| n2l(in, tin1);
| tin[1] = tin1;
| IDEA_encrypt(tin, ks);
| tout0 = tin[0] ^ xor0;
| tout1 = tin[1] ^ xor1;
| l2nn(tout0, tout1, out, l + 8);
| xor0 = tin0;
| xor1 = tin1;
| }
| l2n(xor0, iv);
| l2n(xor1, iv);
| }
| tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
| tin[0] = tin[1] = 0;
| }
|
| void IDEA_encrypt(unsigned long *d, IDEA_KEY_SCHEDULE *key)
| {
| register IDEA_INT *p;
| register unsigned long x1, x2, x3, x4, t0, t1, ul;
|
| x2 = d[0];
| x1 = (x2 >> 16);
| x4 = d[1];
| x3 = (x4 >> 16);
|
| p = &(key->data[0][0]);
|
| E_IDEA(0);
| E_IDEA(1);
| E_IDEA(2);
| E_IDEA(3);
| E_IDEA(4);
| E_IDEA(5);
| E_IDEA(6);
| E_IDEA(7);
|
| x1 &= 0xffff;
| idea_mul(x1, x1, *p, ul);
| p++;
|
| t0 = x3 + *(p++);
| t1 = x2 + *(p++);
|
| x4 &= 0xffff;
| idea_mul(x4, x4, *p, ul);
|
| d[0] = (t0 & 0xffff) | ((x1 & 0xffff) << 16);
| d[1] = (x4 & 0xffff) | ((t1 & 0xffff) << 16);
| }
|
|
