| lh | 9ed821d | 2023-04-07 01:36:19 -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/crypto.h> |
| 11 | #include "des_local.h" |
| 12 | |
| 13 | void DES_string_to_key(const char *str, DES_cblock *key) |
| 14 | { |
| 15 | DES_key_schedule ks; |
| 16 | int i, length; |
| 17 | |
| 18 | memset(key, 0, 8); |
| 19 | length = strlen(str); |
| 20 | for (i = 0; i < length; i++) { |
| 21 | register unsigned char j = str[i]; |
| 22 | |
| 23 | if ((i % 16) < 8) |
| 24 | (*key)[i % 8] ^= (j << 1); |
| 25 | else { |
| 26 | /* Reverse the bit order 05/05/92 eay */ |
| 27 | j = ((j << 4) & 0xf0) | ((j >> 4) & 0x0f); |
| 28 | j = ((j << 2) & 0xcc) | ((j >> 2) & 0x33); |
| 29 | j = ((j << 1) & 0xaa) | ((j >> 1) & 0x55); |
| 30 | (*key)[7 - (i % 8)] ^= j; |
| 31 | } |
| 32 | } |
| 33 | DES_set_odd_parity(key); |
| 34 | DES_set_key_unchecked(key, &ks); |
| 35 | DES_cbc_cksum((const unsigned char *)str, key, length, &ks, key); |
| 36 | OPENSSL_cleanse(&ks, sizeof(ks)); |
| 37 | DES_set_odd_parity(key); |
| 38 | } |
| 39 | |
| 40 | void DES_string_to_2keys(const char *str, DES_cblock *key1, DES_cblock *key2) |
| 41 | { |
| 42 | DES_key_schedule ks; |
| 43 | int i, length; |
| 44 | |
| 45 | memset(key1, 0, 8); |
| 46 | memset(key2, 0, 8); |
| 47 | length = strlen(str); |
| 48 | for (i = 0; i < length; i++) { |
| 49 | register unsigned char j = str[i]; |
| 50 | |
| 51 | if ((i % 32) < 16) { |
| 52 | if ((i % 16) < 8) |
| 53 | (*key1)[i % 8] ^= (j << 1); |
| 54 | else |
| 55 | (*key2)[i % 8] ^= (j << 1); |
| 56 | } else { |
| 57 | j = ((j << 4) & 0xf0) | ((j >> 4) & 0x0f); |
| 58 | j = ((j << 2) & 0xcc) | ((j >> 2) & 0x33); |
| 59 | j = ((j << 1) & 0xaa) | ((j >> 1) & 0x55); |
| 60 | if ((i % 16) < 8) |
| 61 | (*key1)[7 - (i % 8)] ^= j; |
| 62 | else |
| 63 | (*key2)[7 - (i % 8)] ^= j; |
| 64 | } |
| 65 | } |
| 66 | if (length <= 8) |
| 67 | memcpy(key2, key1, 8); |
| 68 | DES_set_odd_parity(key1); |
| 69 | DES_set_odd_parity(key2); |
| 70 | DES_set_key_unchecked(key1, &ks); |
| 71 | DES_cbc_cksum((const unsigned char *)str, key1, length, &ks, key1); |
| 72 | DES_set_key_unchecked(key2, &ks); |
| 73 | DES_cbc_cksum((const unsigned char *)str, key2, length, &ks, key2); |
| 74 | OPENSSL_cleanse(&ks, sizeof(ks)); |
| 75 | DES_set_odd_parity(key1); |
| 76 | DES_set_odd_parity(key2); |
| 77 | } |