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123 lines
3.0 KiB
C
123 lines
3.0 KiB
C
/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/idea.h>
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#include "idea_lcl.h"
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void IDEA_cbc_encrypt(const unsigned char *in, unsigned char *out,
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long length, IDEA_KEY_SCHEDULE *ks, unsigned char *iv,
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int encrypt)
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{
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register unsigned long tin0, tin1;
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register unsigned long tout0, tout1, xor0, xor1;
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register long l = length;
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unsigned long tin[2];
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if (encrypt) {
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n2l(iv, tout0);
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n2l(iv, tout1);
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iv -= 8;
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for (l -= 8; l >= 0; l -= 8) {
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n2l(in, tin0);
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n2l(in, tin1);
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tin0 ^= tout0;
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tin1 ^= tout1;
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tin[0] = tin0;
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tin[1] = tin1;
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IDEA_encrypt(tin, ks);
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tout0 = tin[0];
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l2n(tout0, out);
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tout1 = tin[1];
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l2n(tout1, out);
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}
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if (l != -8) {
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n2ln(in, tin0, tin1, l + 8);
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tin0 ^= tout0;
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tin1 ^= tout1;
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tin[0] = tin0;
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tin[1] = tin1;
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IDEA_encrypt(tin, ks);
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tout0 = tin[0];
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l2n(tout0, out);
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tout1 = tin[1];
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l2n(tout1, out);
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}
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l2n(tout0, iv);
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l2n(tout1, iv);
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} else {
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n2l(iv, xor0);
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n2l(iv, xor1);
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iv -= 8;
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for (l -= 8; l >= 0; l -= 8) {
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n2l(in, tin0);
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tin[0] = tin0;
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n2l(in, tin1);
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tin[1] = tin1;
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IDEA_encrypt(tin, ks);
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tout0 = tin[0] ^ xor0;
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tout1 = tin[1] ^ xor1;
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l2n(tout0, out);
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l2n(tout1, out);
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xor0 = tin0;
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xor1 = tin1;
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}
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if (l != -8) {
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n2l(in, tin0);
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tin[0] = tin0;
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n2l(in, tin1);
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tin[1] = tin1;
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IDEA_encrypt(tin, ks);
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tout0 = tin[0] ^ xor0;
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tout1 = tin[1] ^ xor1;
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l2nn(tout0, tout1, out, l + 8);
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xor0 = tin0;
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xor1 = tin1;
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}
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l2n(xor0, iv);
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l2n(xor1, iv);
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}
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tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
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tin[0] = tin[1] = 0;
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}
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void IDEA_encrypt(unsigned long *d, IDEA_KEY_SCHEDULE *key)
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{
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register IDEA_INT *p;
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register unsigned long x1, x2, x3, x4, t0, t1, ul;
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x2 = d[0];
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x1 = (x2 >> 16);
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x4 = d[1];
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x3 = (x4 >> 16);
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p = &(key->data[0][0]);
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E_IDEA(0);
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E_IDEA(1);
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E_IDEA(2);
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E_IDEA(3);
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E_IDEA(4);
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E_IDEA(5);
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E_IDEA(6);
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E_IDEA(7);
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x1 &= 0xffff;
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idea_mul(x1, x1, *p, ul);
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p++;
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t0 = x3 + *(p++);
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t1 = x2 + *(p++);
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x4 &= 0xffff;
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idea_mul(x4, x4, *p, ul);
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d[0] = (t0 & 0xffff) | ((x1 & 0xffff) << 16);
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d[1] = (x4 & 0xffff) | ((t1 & 0xffff) << 16);
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}
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