| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. |
| 3 | * |
| 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 |
| 8 | */ |
| 9 | |
| 10 | #include <openssl/idea.h> |
| 11 | #include "idea_local.h" |
| 12 | |
| 13 | void IDEA_cbc_encrypt(const unsigned char *in, unsigned char *out, |
| 14 | long length, IDEA_KEY_SCHEDULE *ks, unsigned char *iv, |
| 15 | int encrypt) |
| 16 | { |
| 17 | register unsigned long tin0, tin1; |
| 18 | register unsigned long tout0, tout1, xor0, xor1; |
| 19 | register long l = length; |
| 20 | unsigned long tin[2]; |
| 21 | |
| 22 | if (encrypt) { |
| 23 | n2l(iv, tout0); |
| 24 | n2l(iv, tout1); |
| 25 | iv -= 8; |
| 26 | for (l -= 8; l >= 0; l -= 8) { |
| 27 | n2l(in, tin0); |
| 28 | n2l(in, tin1); |
| 29 | tin0 ^= tout0; |
| 30 | tin1 ^= tout1; |
| 31 | tin[0] = tin0; |
| 32 | tin[1] = tin1; |
| 33 | IDEA_encrypt(tin, ks); |
| 34 | tout0 = tin[0]; |
| 35 | l2n(tout0, out); |
| 36 | tout1 = tin[1]; |
| 37 | l2n(tout1, out); |
| 38 | } |
| 39 | if (l != -8) { |
| 40 | n2ln(in, tin0, tin1, l + 8); |
| 41 | tin0 ^= tout0; |
| 42 | tin1 ^= tout1; |
| 43 | tin[0] = tin0; |
| 44 | tin[1] = tin1; |
| 45 | IDEA_encrypt(tin, ks); |
| 46 | tout0 = tin[0]; |
| 47 | l2n(tout0, out); |
| 48 | tout1 = tin[1]; |
| 49 | l2n(tout1, out); |
| 50 | } |
| 51 | l2n(tout0, iv); |
| 52 | l2n(tout1, iv); |
| 53 | } else { |
| 54 | n2l(iv, xor0); |
| 55 | n2l(iv, xor1); |
| 56 | iv -= 8; |
| 57 | for (l -= 8; l >= 0; l -= 8) { |
| 58 | n2l(in, tin0); |
| 59 | tin[0] = tin0; |
| 60 | n2l(in, tin1); |
| 61 | tin[1] = tin1; |
| 62 | IDEA_encrypt(tin, ks); |
| 63 | tout0 = tin[0] ^ xor0; |
| 64 | tout1 = tin[1] ^ xor1; |
| 65 | l2n(tout0, out); |
| 66 | l2n(tout1, out); |
| 67 | xor0 = tin0; |
| 68 | xor1 = tin1; |
| 69 | } |
| 70 | if (l != -8) { |
| 71 | n2l(in, tin0); |
| 72 | tin[0] = tin0; |
| 73 | n2l(in, tin1); |
| 74 | tin[1] = tin1; |
| 75 | IDEA_encrypt(tin, ks); |
| 76 | tout0 = tin[0] ^ xor0; |
| 77 | tout1 = tin[1] ^ xor1; |
| 78 | l2nn(tout0, tout1, out, l + 8); |
| 79 | xor0 = tin0; |
| 80 | xor1 = tin1; |
| 81 | } |
| 82 | l2n(xor0, iv); |
| 83 | l2n(xor1, iv); |
| 84 | } |
| 85 | tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; |
| 86 | tin[0] = tin[1] = 0; |
| 87 | } |
| 88 | |
| 89 | void IDEA_encrypt(unsigned long *d, IDEA_KEY_SCHEDULE *key) |
| 90 | { |
| 91 | register IDEA_INT *p; |
| 92 | register unsigned long x1, x2, x3, x4, t0, t1, ul; |
| 93 | |
| 94 | x2 = d[0]; |
| 95 | x1 = (x2 >> 16); |
| 96 | x4 = d[1]; |
| 97 | x3 = (x4 >> 16); |
| 98 | |
| 99 | p = &(key->data[0][0]); |
| 100 | |
| 101 | E_IDEA(0); |
| 102 | E_IDEA(1); |
| 103 | E_IDEA(2); |
| 104 | E_IDEA(3); |
| 105 | E_IDEA(4); |
| 106 | E_IDEA(5); |
| 107 | E_IDEA(6); |
| 108 | E_IDEA(7); |
| 109 | |
| 110 | x1 &= 0xffff; |
| 111 | idea_mul(x1, x1, *p, ul); |
| 112 | p++; |
| 113 | |
| 114 | t0 = x3 + *(p++); |
| 115 | t1 = x2 + *(p++); |
| 116 | |
| 117 | x4 &= 0xffff; |
| 118 | idea_mul(x4, x4, *p, ul); |
| 119 | |
| 120 | d[0] = (t0 & 0xffff) | ((x1 & 0xffff) << 16); |
| 121 | d[1] = (x4 & 0xffff) | ((t1 & 0xffff) << 16); |
| 122 | } |