1 /* 2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (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 8 */ 9 10 /* 11 * IDEA low level APIs are deprecated for public use, but still ok for internal 12 * use where we're using them to implement the higher level EVP interface, as is 13 * the case here. 14 */ 15 #include "internal/deprecated.h" 16 17 #include <openssl/idea.h> 18 #include "idea_local.h" 19 20 void IDEA_cbc_encrypt(const unsigned char *in, unsigned char *out, 21 long length, IDEA_KEY_SCHEDULE *ks, unsigned char *iv, 22 int encrypt) 23 { 24 register unsigned long tin0, tin1; 25 register unsigned long tout0, tout1, xor0, xor1; 26 register long l = length; 27 unsigned long tin[2]; 28 29 if (encrypt) { 30 n2l(iv, tout0); 31 n2l(iv, tout1); 32 iv -= 8; 33 for (l -= 8; l >= 0; l -= 8) { 34 n2l(in, tin0); 35 n2l(in, tin1); 36 tin0 ^= tout0; 37 tin1 ^= tout1; 38 tin[0] = tin0; 39 tin[1] = tin1; 40 IDEA_encrypt(tin, ks); 41 tout0 = tin[0]; 42 l2n(tout0, out); 43 tout1 = tin[1]; 44 l2n(tout1, out); 45 } 46 if (l != -8) { 47 n2ln(in, tin0, tin1, l + 8); 48 tin0 ^= tout0; 49 tin1 ^= tout1; 50 tin[0] = tin0; 51 tin[1] = tin1; 52 IDEA_encrypt(tin, ks); 53 tout0 = tin[0]; 54 l2n(tout0, out); 55 tout1 = tin[1]; 56 l2n(tout1, out); 57 } 58 l2n(tout0, iv); 59 l2n(tout1, iv); 60 } else { 61 n2l(iv, xor0); 62 n2l(iv, xor1); 63 iv -= 8; 64 for (l -= 8; l >= 0; l -= 8) { 65 n2l(in, tin0); 66 tin[0] = tin0; 67 n2l(in, tin1); 68 tin[1] = tin1; 69 IDEA_encrypt(tin, ks); 70 tout0 = tin[0] ^ xor0; 71 tout1 = tin[1] ^ xor1; 72 l2n(tout0, out); 73 l2n(tout1, out); 74 xor0 = tin0; 75 xor1 = tin1; 76 } 77 if (l != -8) { 78 n2l(in, tin0); 79 tin[0] = tin0; 80 n2l(in, tin1); 81 tin[1] = tin1; 82 IDEA_encrypt(tin, ks); 83 tout0 = tin[0] ^ xor0; 84 tout1 = tin[1] ^ xor1; 85 l2nn(tout0, tout1, out, l + 8); 86 xor0 = tin0; 87 xor1 = tin1; 88 } 89 l2n(xor0, iv); 90 l2n(xor1, iv); 91 } 92 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; 93 tin[0] = tin[1] = 0; 94 } 95 96 void IDEA_encrypt(unsigned long *d, IDEA_KEY_SCHEDULE *key) 97 { 98 register IDEA_INT *p; 99 register unsigned long x1, x2, x3, x4, t0, t1, ul; 100 101 x2 = d[0]; 102 x1 = (x2 >> 16); 103 x4 = d[1]; 104 x3 = (x4 >> 16); 105 106 p = &(key->data[0][0]); 107 108 E_IDEA(0); 109 E_IDEA(1); 110 E_IDEA(2); 111 E_IDEA(3); 112 E_IDEA(4); 113 E_IDEA(5); 114 E_IDEA(6); 115 E_IDEA(7); 116 117 x1 &= 0xffff; 118 idea_mul(x1, x1, *p, ul); 119 p++; 120 121 t0 = x3 + *(p++); 122 t1 = x2 + *(p++); 123 124 x4 &= 0xffff; 125 idea_mul(x4, x4, *p, ul); 126 127 d[0] = (t0 & 0xffff) | ((x1 & 0xffff) << 16); 128 d[1] = (x4 & 0xffff) | ((t1 & 0xffff) << 16); 129 } 130