| 1 | /*
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| 2 | * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | /*-
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| 11 | * set_key.c v 1.4 eay 24/9/91
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| 12 | * 1.4 Speed up by 400% :-)
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| 13 | * 1.3 added register declarations.
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| 14 | * 1.2 unrolled make_key_sched a bit more
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| 15 | * 1.1 added norm_expand_bits
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| 16 | * 1.0 First working version
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| 17 | */
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| 18 |
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| 19 | /*
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| 20 | * DES low level APIs are deprecated for public use, but still ok for internal
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| 21 | * use.
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| 22 | */
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| 23 | #include "internal/deprecated.h"
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| 24 |
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| 25 | #include <openssl/crypto.h>
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| 26 | #include "internal/constant_time.h"
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| 27 | #include "internal/nelem.h"
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| 28 | #include "des_local.h"
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| 29 |
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| 30 | static const unsigned char odd_parity[256] = {
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| 31 | 1, 1, 2, 2, 4, 4, 7, 7, 8, 8, 11, 11, 13, 13, 14, 14,
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| 32 | 16, 16, 19, 19, 21, 21, 22, 22, 25, 25, 26, 26, 28, 28, 31, 31,
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| 33 | 32, 32, 35, 35, 37, 37, 38, 38, 41, 41, 42, 42, 44, 44, 47, 47,
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| 34 | 49, 49, 50, 50, 52, 52, 55, 55, 56, 56, 59, 59, 61, 61, 62, 62,
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| 35 | 64, 64, 67, 67, 69, 69, 70, 70, 73, 73, 74, 74, 76, 76, 79, 79,
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| 36 | 81, 81, 82, 82, 84, 84, 87, 87, 88, 88, 91, 91, 93, 93, 94, 94,
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| 37 | 97, 97, 98, 98, 100, 100, 103, 103, 104, 104, 107, 107, 109, 109, 110,
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| 38 | 110,
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| 39 | 112, 112, 115, 115, 117, 117, 118, 118, 121, 121, 122, 122, 124, 124, 127,
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| 40 | 127,
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| 41 | 128, 128, 131, 131, 133, 133, 134, 134, 137, 137, 138, 138, 140, 140, 143,
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| 42 | 143,
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| 43 | 145, 145, 146, 146, 148, 148, 151, 151, 152, 152, 155, 155, 157, 157, 158,
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| 44 | 158,
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| 45 | 161, 161, 162, 162, 164, 164, 167, 167, 168, 168, 171, 171, 173, 173, 174,
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| 46 | 174,
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| 47 | 176, 176, 179, 179, 181, 181, 182, 182, 185, 185, 186, 186, 188, 188, 191,
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| 48 | 191,
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| 49 | 193, 193, 194, 194, 196, 196, 199, 199, 200, 200, 203, 203, 205, 205, 206,
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| 50 | 206,
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| 51 | 208, 208, 211, 211, 213, 213, 214, 214, 217, 217, 218, 218, 220, 220, 223,
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| 52 | 223,
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| 53 | 224, 224, 227, 227, 229, 229, 230, 230, 233, 233, 234, 234, 236, 236, 239,
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| 54 | 239,
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| 55 | 241, 241, 242, 242, 244, 244, 247, 247, 248, 248, 251, 251, 253, 253, 254,
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| 56 | 254
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| 57 | };
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| 58 |
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| 59 | void DES_set_odd_parity(DES_cblock *key)
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| 60 | {
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| 61 | unsigned int i;
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| 62 |
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| 63 | for (i = 0; i < DES_KEY_SZ; i++)
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| 64 | (*key)[i] = odd_parity[(*key)[i]];
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| 65 | }
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| 66 |
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| 67 | /*
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| 68 | * Check that a key has the correct parity.
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| 69 | * Return 1 if parity is okay and 0 if not.
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| 70 | */
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| 71 | int DES_check_key_parity(const_DES_cblock *key)
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| 72 | {
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| 73 | unsigned int i;
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| 74 | unsigned char res = 0377, b;
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| 75 |
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| 76 | for (i = 0; i < DES_KEY_SZ; i++) {
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| 77 | b = (*key)[i];
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| 78 | b ^= b >> 4;
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| 79 | b ^= b >> 2;
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| 80 | b ^= b >> 1;
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| 81 | res &= constant_time_eq_8(b & 1, 1);
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| 82 | }
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| 83 | return (int)(res & 1);
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| 84 | }
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| 85 |
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| 86 | /*-
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| 87 | * Weak and semi weak keys as taken from
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| 88 | * %A D.W. Davies
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| 89 | * %A W.L. Price
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| 90 | * %T Security for Computer Networks
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| 91 | * %I John Wiley & Sons
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| 92 | * %D 1984
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| 93 | */
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| 94 | static const DES_cblock weak_keys[] = {
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| 95 | /* weak keys */
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| 96 | {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01},
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| 97 | {0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE},
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| 98 | {0x1F, 0x1F, 0x1F, 0x1F, 0x0E, 0x0E, 0x0E, 0x0E},
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| 99 | {0xE0, 0xE0, 0xE0, 0xE0, 0xF1, 0xF1, 0xF1, 0xF1},
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| 100 | /* semi-weak keys */
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| 101 | {0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE},
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| 102 | {0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01},
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| 103 | {0x1F, 0xE0, 0x1F, 0xE0, 0x0E, 0xF1, 0x0E, 0xF1},
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| 104 | {0xE0, 0x1F, 0xE0, 0x1F, 0xF1, 0x0E, 0xF1, 0x0E},
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| 105 | {0x01, 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1},
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| 106 | {0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1, 0x01},
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| 107 | {0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E, 0xFE},
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| 108 | {0xFE, 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E},
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| 109 | {0x01, 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E},
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| 110 | {0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E, 0x01},
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| 111 | {0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1, 0xFE},
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| 112 | {0xFE, 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1}
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| 113 | };
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| 114 |
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| 115 | /*
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| 116 | * Check for weak keys.
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| 117 | * Return 1 if the key is weak and 0 otherwise.
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| 118 | */
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| 119 | int DES_is_weak_key(const_DES_cblock *key)
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| 120 | {
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| 121 | unsigned int i, res = 0;
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| 122 | int j;
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| 123 |
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| 124 | for (i = 0; i < OSSL_NELEM(weak_keys); i++) {
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| 125 | j = CRYPTO_memcmp(weak_keys[i], key, sizeof(DES_cblock));
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| 126 | res |= constant_time_is_zero((unsigned int)j);
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| 127 | }
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| 128 | return (int)(res & 1);
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| 129 | }
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| 130 |
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| 131 | /*-
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| 132 | * NOW DEFINED IN des_local.h
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| 133 | * See ecb_encrypt.c for a pseudo description of these macros.
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| 134 | * #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
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| 135 | * (b)^=(t),\
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| 136 | * (a)=((a)^((t)<<(n))))
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| 137 | */
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| 138 |
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| 139 | #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\
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| 140 | (a)=(a)^(t)^(t>>(16-(n))))
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| 141 |
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| 142 | static const DES_LONG des_skb[8][64] = {
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| 143 | {
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| 144 | /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
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| 145 | 0x00000000L, 0x00000010L, 0x20000000L, 0x20000010L,
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| 146 | 0x00010000L, 0x00010010L, 0x20010000L, 0x20010010L,
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| 147 | 0x00000800L, 0x00000810L, 0x20000800L, 0x20000810L,
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| 148 | 0x00010800L, 0x00010810L, 0x20010800L, 0x20010810L,
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| 149 | 0x00000020L, 0x00000030L, 0x20000020L, 0x20000030L,
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| 150 | 0x00010020L, 0x00010030L, 0x20010020L, 0x20010030L,
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| 151 | 0x00000820L, 0x00000830L, 0x20000820L, 0x20000830L,
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| 152 | 0x00010820L, 0x00010830L, 0x20010820L, 0x20010830L,
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| 153 | 0x00080000L, 0x00080010L, 0x20080000L, 0x20080010L,
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| 154 | 0x00090000L, 0x00090010L, 0x20090000L, 0x20090010L,
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| 155 | 0x00080800L, 0x00080810L, 0x20080800L, 0x20080810L,
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| 156 | 0x00090800L, 0x00090810L, 0x20090800L, 0x20090810L,
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| 157 | 0x00080020L, 0x00080030L, 0x20080020L, 0x20080030L,
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| 158 | 0x00090020L, 0x00090030L, 0x20090020L, 0x20090030L,
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| 159 | 0x00080820L, 0x00080830L, 0x20080820L, 0x20080830L,
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| 160 | 0x00090820L, 0x00090830L, 0x20090820L, 0x20090830L,
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| 161 | },
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| 162 | {
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| 163 | /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
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| 164 | 0x00000000L, 0x02000000L, 0x00002000L, 0x02002000L,
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| 165 | 0x00200000L, 0x02200000L, 0x00202000L, 0x02202000L,
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| 166 | 0x00000004L, 0x02000004L, 0x00002004L, 0x02002004L,
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| 167 | 0x00200004L, 0x02200004L, 0x00202004L, 0x02202004L,
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| 168 | 0x00000400L, 0x02000400L, 0x00002400L, 0x02002400L,
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| 169 | 0x00200400L, 0x02200400L, 0x00202400L, 0x02202400L,
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| 170 | 0x00000404L, 0x02000404L, 0x00002404L, 0x02002404L,
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| 171 | 0x00200404L, 0x02200404L, 0x00202404L, 0x02202404L,
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| 172 | 0x10000000L, 0x12000000L, 0x10002000L, 0x12002000L,
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| 173 | 0x10200000L, 0x12200000L, 0x10202000L, 0x12202000L,
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| 174 | 0x10000004L, 0x12000004L, 0x10002004L, 0x12002004L,
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| 175 | 0x10200004L, 0x12200004L, 0x10202004L, 0x12202004L,
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| 176 | 0x10000400L, 0x12000400L, 0x10002400L, 0x12002400L,
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| 177 | 0x10200400L, 0x12200400L, 0x10202400L, 0x12202400L,
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| 178 | 0x10000404L, 0x12000404L, 0x10002404L, 0x12002404L,
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| 179 | 0x10200404L, 0x12200404L, 0x10202404L, 0x12202404L,
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| 180 | },
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| 181 | {
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| 182 | /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
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| 183 | 0x00000000L, 0x00000001L, 0x00040000L, 0x00040001L,
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| 184 | 0x01000000L, 0x01000001L, 0x01040000L, 0x01040001L,
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| 185 | 0x00000002L, 0x00000003L, 0x00040002L, 0x00040003L,
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| 186 | 0x01000002L, 0x01000003L, 0x01040002L, 0x01040003L,
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| 187 | 0x00000200L, 0x00000201L, 0x00040200L, 0x00040201L,
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| 188 | 0x01000200L, 0x01000201L, 0x01040200L, 0x01040201L,
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| 189 | 0x00000202L, 0x00000203L, 0x00040202L, 0x00040203L,
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| 190 | 0x01000202L, 0x01000203L, 0x01040202L, 0x01040203L,
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| 191 | 0x08000000L, 0x08000001L, 0x08040000L, 0x08040001L,
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| 192 | 0x09000000L, 0x09000001L, 0x09040000L, 0x09040001L,
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| 193 | 0x08000002L, 0x08000003L, 0x08040002L, 0x08040003L,
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| 194 | 0x09000002L, 0x09000003L, 0x09040002L, 0x09040003L,
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| 195 | 0x08000200L, 0x08000201L, 0x08040200L, 0x08040201L,
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| 196 | 0x09000200L, 0x09000201L, 0x09040200L, 0x09040201L,
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| 197 | 0x08000202L, 0x08000203L, 0x08040202L, 0x08040203L,
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| 198 | 0x09000202L, 0x09000203L, 0x09040202L, 0x09040203L,
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| 199 | },
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| 200 | {
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| 201 | /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
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| 202 | 0x00000000L, 0x00100000L, 0x00000100L, 0x00100100L,
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| 203 | 0x00000008L, 0x00100008L, 0x00000108L, 0x00100108L,
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| 204 | 0x00001000L, 0x00101000L, 0x00001100L, 0x00101100L,
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| 205 | 0x00001008L, 0x00101008L, 0x00001108L, 0x00101108L,
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| 206 | 0x04000000L, 0x04100000L, 0x04000100L, 0x04100100L,
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| 207 | 0x04000008L, 0x04100008L, 0x04000108L, 0x04100108L,
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| 208 | 0x04001000L, 0x04101000L, 0x04001100L, 0x04101100L,
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| 209 | 0x04001008L, 0x04101008L, 0x04001108L, 0x04101108L,
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| 210 | 0x00020000L, 0x00120000L, 0x00020100L, 0x00120100L,
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| 211 | 0x00020008L, 0x00120008L, 0x00020108L, 0x00120108L,
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| 212 | 0x00021000L, 0x00121000L, 0x00021100L, 0x00121100L,
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| 213 | 0x00021008L, 0x00121008L, 0x00021108L, 0x00121108L,
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| 214 | 0x04020000L, 0x04120000L, 0x04020100L, 0x04120100L,
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| 215 | 0x04020008L, 0x04120008L, 0x04020108L, 0x04120108L,
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| 216 | 0x04021000L, 0x04121000L, 0x04021100L, 0x04121100L,
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| 217 | 0x04021008L, 0x04121008L, 0x04021108L, 0x04121108L,
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| 218 | },
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| 219 | {
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| 220 | /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
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| 221 | 0x00000000L, 0x10000000L, 0x00010000L, 0x10010000L,
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| 222 | 0x00000004L, 0x10000004L, 0x00010004L, 0x10010004L,
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| 223 | 0x20000000L, 0x30000000L, 0x20010000L, 0x30010000L,
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| 224 | 0x20000004L, 0x30000004L, 0x20010004L, 0x30010004L,
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| 225 | 0x00100000L, 0x10100000L, 0x00110000L, 0x10110000L,
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| 226 | 0x00100004L, 0x10100004L, 0x00110004L, 0x10110004L,
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| 227 | 0x20100000L, 0x30100000L, 0x20110000L, 0x30110000L,
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| 228 | 0x20100004L, 0x30100004L, 0x20110004L, 0x30110004L,
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| 229 | 0x00001000L, 0x10001000L, 0x00011000L, 0x10011000L,
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| 230 | 0x00001004L, 0x10001004L, 0x00011004L, 0x10011004L,
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| 231 | 0x20001000L, 0x30001000L, 0x20011000L, 0x30011000L,
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| 232 | 0x20001004L, 0x30001004L, 0x20011004L, 0x30011004L,
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| 233 | 0x00101000L, 0x10101000L, 0x00111000L, 0x10111000L,
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| 234 | 0x00101004L, 0x10101004L, 0x00111004L, 0x10111004L,
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| 235 | 0x20101000L, 0x30101000L, 0x20111000L, 0x30111000L,
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| 236 | 0x20101004L, 0x30101004L, 0x20111004L, 0x30111004L,
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| 237 | },
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| 238 | {
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| 239 | /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
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| 240 | 0x00000000L, 0x08000000L, 0x00000008L, 0x08000008L,
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| 241 | 0x00000400L, 0x08000400L, 0x00000408L, 0x08000408L,
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| 242 | 0x00020000L, 0x08020000L, 0x00020008L, 0x08020008L,
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| 243 | 0x00020400L, 0x08020400L, 0x00020408L, 0x08020408L,
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| 244 | 0x00000001L, 0x08000001L, 0x00000009L, 0x08000009L,
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| 245 | 0x00000401L, 0x08000401L, 0x00000409L, 0x08000409L,
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| 246 | 0x00020001L, 0x08020001L, 0x00020009L, 0x08020009L,
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| 247 | 0x00020401L, 0x08020401L, 0x00020409L, 0x08020409L,
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| 248 | 0x02000000L, 0x0A000000L, 0x02000008L, 0x0A000008L,
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| 249 | 0x02000400L, 0x0A000400L, 0x02000408L, 0x0A000408L,
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| 250 | 0x02020000L, 0x0A020000L, 0x02020008L, 0x0A020008L,
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| 251 | 0x02020400L, 0x0A020400L, 0x02020408L, 0x0A020408L,
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| 252 | 0x02000001L, 0x0A000001L, 0x02000009L, 0x0A000009L,
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| 253 | 0x02000401L, 0x0A000401L, 0x02000409L, 0x0A000409L,
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| 254 | 0x02020001L, 0x0A020001L, 0x02020009L, 0x0A020009L,
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| 255 | 0x02020401L, 0x0A020401L, 0x02020409L, 0x0A020409L,
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| 256 | },
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| 257 | {
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| 258 | /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
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| 259 | 0x00000000L, 0x00000100L, 0x00080000L, 0x00080100L,
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| 260 | 0x01000000L, 0x01000100L, 0x01080000L, 0x01080100L,
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| 261 | 0x00000010L, 0x00000110L, 0x00080010L, 0x00080110L,
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| 262 | 0x01000010L, 0x01000110L, 0x01080010L, 0x01080110L,
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| 263 | 0x00200000L, 0x00200100L, 0x00280000L, 0x00280100L,
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| 264 | 0x01200000L, 0x01200100L, 0x01280000L, 0x01280100L,
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| 265 | 0x00200010L, 0x00200110L, 0x00280010L, 0x00280110L,
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| 266 | 0x01200010L, 0x01200110L, 0x01280010L, 0x01280110L,
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| 267 | 0x00000200L, 0x00000300L, 0x00080200L, 0x00080300L,
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| 268 | 0x01000200L, 0x01000300L, 0x01080200L, 0x01080300L,
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| 269 | 0x00000210L, 0x00000310L, 0x00080210L, 0x00080310L,
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| 270 | 0x01000210L, 0x01000310L, 0x01080210L, 0x01080310L,
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| 271 | 0x00200200L, 0x00200300L, 0x00280200L, 0x00280300L,
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| 272 | 0x01200200L, 0x01200300L, 0x01280200L, 0x01280300L,
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| 273 | 0x00200210L, 0x00200310L, 0x00280210L, 0x00280310L,
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| 274 | 0x01200210L, 0x01200310L, 0x01280210L, 0x01280310L,
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| 275 | },
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| 276 | {
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| 277 | /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
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| 278 | 0x00000000L, 0x04000000L, 0x00040000L, 0x04040000L,
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| 279 | 0x00000002L, 0x04000002L, 0x00040002L, 0x04040002L,
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| 280 | 0x00002000L, 0x04002000L, 0x00042000L, 0x04042000L,
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| 281 | 0x00002002L, 0x04002002L, 0x00042002L, 0x04042002L,
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| 282 | 0x00000020L, 0x04000020L, 0x00040020L, 0x04040020L,
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| 283 | 0x00000022L, 0x04000022L, 0x00040022L, 0x04040022L,
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| 284 | 0x00002020L, 0x04002020L, 0x00042020L, 0x04042020L,
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| 285 | 0x00002022L, 0x04002022L, 0x00042022L, 0x04042022L,
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| 286 | 0x00000800L, 0x04000800L, 0x00040800L, 0x04040800L,
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| 287 | 0x00000802L, 0x04000802L, 0x00040802L, 0x04040802L,
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| 288 | 0x00002800L, 0x04002800L, 0x00042800L, 0x04042800L,
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| 289 | 0x00002802L, 0x04002802L, 0x00042802L, 0x04042802L,
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| 290 | 0x00000820L, 0x04000820L, 0x00040820L, 0x04040820L,
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| 291 | 0x00000822L, 0x04000822L, 0x00040822L, 0x04040822L,
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| 292 | 0x00002820L, 0x04002820L, 0x00042820L, 0x04042820L,
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| 293 | 0x00002822L, 0x04002822L, 0x00042822L, 0x04042822L,
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| 294 | }
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| 295 | };
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| 296 |
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| 297 | /* Return values as DES_set_key_checked() but always set the key */
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| 298 | int DES_set_key(const_DES_cblock *key, DES_key_schedule *schedule)
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| 299 | {
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| 300 | int ret = 0;
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| 301 |
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| 302 | if (!DES_check_key_parity(key))
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| 303 | ret = -1;
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| 304 | if (DES_is_weak_key(key))
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| 305 | ret = -2;
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| 306 | DES_set_key_unchecked(key, schedule);
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| 307 | return ret;
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|---|
| 308 | }
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|---|
| 309 |
|
|---|
| 310 | /*-
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|---|
| 311 | * return 0 if key parity is odd (correct),
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| 312 | * return -1 if key parity error,
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| 313 | * return -2 if illegal weak key.
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| 314 | */
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| 315 | int DES_set_key_checked(const_DES_cblock *key, DES_key_schedule *schedule)
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| 316 | {
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| 317 | if (!DES_check_key_parity(key))
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|---|
| 318 | return -1;
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|---|
| 319 | if (DES_is_weak_key(key))
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|---|
| 320 | return -2;
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|---|
| 321 | DES_set_key_unchecked(key, schedule);
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| 322 | return 0;
|
|---|
| 323 | }
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|---|
| 324 |
|
|---|
| 325 | void DES_set_key_unchecked(const_DES_cblock *key, DES_key_schedule *schedule)
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| 326 | {
|
|---|
| 327 | static const int shifts2[16] =
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| 328 | { 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0 };
|
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| 329 | register DES_LONG c, d, t, s, t2;
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|---|
| 330 | register const unsigned char *in;
|
|---|
| 331 | register DES_LONG *k;
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|---|
| 332 | register int i;
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|---|
| 333 |
|
|---|
| 334 | #ifdef OPENBSD_DEV_CRYPTO
|
|---|
| 335 | memcpy(schedule->key, key, sizeof(schedule->key));
|
|---|
| 336 | schedule->session = NULL;
|
|---|
| 337 | #endif
|
|---|
| 338 | k = &schedule->ks->deslong[0];
|
|---|
| 339 | in = &(*key)[0];
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|---|
| 340 |
|
|---|
| 341 | c2l(in, c);
|
|---|
| 342 | c2l(in, d);
|
|---|
| 343 |
|
|---|
| 344 | /*
|
|---|
| 345 | * do PC1 in 47 simple operations. Thanks to John Fletcher
|
|---|
| 346 | * for the inspiration.
|
|---|
| 347 | */
|
|---|
| 348 | PERM_OP(d, c, t, 4, 0x0f0f0f0fL);
|
|---|
| 349 | HPERM_OP(c, t, -2, 0xcccc0000L);
|
|---|
| 350 | HPERM_OP(d, t, -2, 0xcccc0000L);
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|---|
| 351 | PERM_OP(d, c, t, 1, 0x55555555L);
|
|---|
| 352 | PERM_OP(c, d, t, 8, 0x00ff00ffL);
|
|---|
| 353 | PERM_OP(d, c, t, 1, 0x55555555L);
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|---|
| 354 | d = (((d & 0x000000ffL) << 16L) | (d & 0x0000ff00L) |
|
|---|
| 355 | ((d & 0x00ff0000L) >> 16L) | ((c & 0xf0000000L) >> 4L));
|
|---|
| 356 | c &= 0x0fffffffL;
|
|---|
| 357 |
|
|---|
| 358 | for (i = 0; i < ITERATIONS; i++) {
|
|---|
| 359 | if (shifts2[i]) {
|
|---|
| 360 | c = ((c >> 2L) | (c << 26L));
|
|---|
| 361 | d = ((d >> 2L) | (d << 26L));
|
|---|
| 362 | } else {
|
|---|
| 363 | c = ((c >> 1L) | (c << 27L));
|
|---|
| 364 | d = ((d >> 1L) | (d << 27L));
|
|---|
| 365 | }
|
|---|
| 366 | c &= 0x0fffffffL;
|
|---|
| 367 | d &= 0x0fffffffL;
|
|---|
| 368 | /*
|
|---|
| 369 | * could be a few less shifts but I am to lazy at this point in time
|
|---|
| 370 | * to investigate
|
|---|
| 371 | */
|
|---|
| 372 | s = des_skb[0][(c) & 0x3f] |
|
|---|
| 373 | des_skb[1][((c >> 6L) & 0x03) | ((c >> 7L) & 0x3c)] |
|
|---|
| 374 | des_skb[2][((c >> 13L) & 0x0f) | ((c >> 14L) & 0x30)] |
|
|---|
| 375 | des_skb[3][((c >> 20L) & 0x01) | ((c >> 21L) & 0x06) |
|
|---|
| 376 | ((c >> 22L) & 0x38)];
|
|---|
| 377 | t = des_skb[4][(d) & 0x3f] |
|
|---|
| 378 | des_skb[5][((d >> 7L) & 0x03) | ((d >> 8L) & 0x3c)] |
|
|---|
| 379 | des_skb[6][(d >> 15L) & 0x3f] |
|
|---|
| 380 | des_skb[7][((d >> 21L) & 0x0f) | ((d >> 22L) & 0x30)];
|
|---|
| 381 |
|
|---|
| 382 | /* table contained 0213 4657 */
|
|---|
| 383 | t2 = ((t << 16L) | (s & 0x0000ffffL)) & 0xffffffffL;
|
|---|
| 384 | *(k++) = ROTATE(t2, 30) & 0xffffffffL;
|
|---|
| 385 |
|
|---|
| 386 | t2 = ((s >> 16L) | (t & 0xffff0000L));
|
|---|
| 387 | *(k++) = ROTATE(t2, 26) & 0xffffffffL;
|
|---|
| 388 | }
|
|---|
| 389 | }
|
|---|
| 390 |
|
|---|
| 391 | int DES_key_sched(const_DES_cblock *key, DES_key_schedule *schedule)
|
|---|
| 392 | {
|
|---|
| 393 | return DES_set_key(key, schedule);
|
|---|
| 394 | }
|
|---|
