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https://github.com/openssl/openssl.git
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98 lines
2.9 KiB
C
98 lines
2.9 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/crypto.h>
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#include "des_locl.h"
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void DES_string_to_key(const char *str, DES_cblock *key)
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{
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DES_key_schedule ks;
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int i, length;
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register unsigned char j;
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memset(key, 0, 8);
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length = strlen(str);
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#ifdef OLD_STR_TO_KEY
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for (i = 0; i < length; i++)
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(*key)[i % 8] ^= (str[i] << 1);
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#else /* MIT COMPATIBLE */
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for (i = 0; i < length; i++) {
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j = str[i];
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if ((i % 16) < 8)
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(*key)[i % 8] ^= (j << 1);
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else {
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/* Reverse the bit order 05/05/92 eay */
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j = ((j << 4) & 0xf0) | ((j >> 4) & 0x0f);
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j = ((j << 2) & 0xcc) | ((j >> 2) & 0x33);
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j = ((j << 1) & 0xaa) | ((j >> 1) & 0x55);
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(*key)[7 - (i % 8)] ^= j;
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}
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}
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#endif
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DES_set_odd_parity(key);
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DES_set_key_unchecked(key, &ks);
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DES_cbc_cksum((const unsigned char *)str, key, length, &ks, key);
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OPENSSL_cleanse(&ks, sizeof(ks));
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DES_set_odd_parity(key);
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}
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void DES_string_to_2keys(const char *str, DES_cblock *key1, DES_cblock *key2)
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{
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DES_key_schedule ks;
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int i, length;
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register unsigned char j;
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memset(key1, 0, 8);
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memset(key2, 0, 8);
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length = strlen(str);
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#ifdef OLD_STR_TO_KEY
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if (length <= 8) {
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for (i = 0; i < length; i++) {
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(*key2)[i] = (*key1)[i] = (str[i] << 1);
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}
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} else {
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for (i = 0; i < length; i++) {
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if ((i / 8) & 1)
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(*key2)[i % 8] ^= (str[i] << 1);
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else
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(*key1)[i % 8] ^= (str[i] << 1);
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}
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}
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#else /* MIT COMPATIBLE */
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for (i = 0; i < length; i++) {
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j = str[i];
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if ((i % 32) < 16) {
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if ((i % 16) < 8)
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(*key1)[i % 8] ^= (j << 1);
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else
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(*key2)[i % 8] ^= (j << 1);
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} else {
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j = ((j << 4) & 0xf0) | ((j >> 4) & 0x0f);
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j = ((j << 2) & 0xcc) | ((j >> 2) & 0x33);
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j = ((j << 1) & 0xaa) | ((j >> 1) & 0x55);
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if ((i % 16) < 8)
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(*key1)[7 - (i % 8)] ^= j;
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else
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(*key2)[7 - (i % 8)] ^= j;
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}
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}
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if (length <= 8)
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memcpy(key2, key1, 8);
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#endif
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DES_set_odd_parity(key1);
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DES_set_odd_parity(key2);
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DES_set_key_unchecked(key1, &ks);
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DES_cbc_cksum((const unsigned char *)str, key1, length, &ks, key1);
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DES_set_key_unchecked(key2, &ks);
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DES_cbc_cksum((const unsigned char *)str, key2, length, &ks, key2);
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OPENSSL_cleanse(&ks, sizeof(ks));
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DES_set_odd_parity(key1);
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DES_set_odd_parity(key2);
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}
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