--- /dev/null
+/* crypto/des/str2key.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <openssl/crypto.h>
+#include "des_locl.h"
+
+void DES_string_to_key(const char *str, DES_cblock *key)
+ {
+ DES_key_schedule ks;
+ int i,length;
+ register unsigned char j;
+
+ memset(key,0,8);
+ length=strlen(str);
+#ifdef OLD_STR_TO_KEY
+ for (i=0; i<length; i++)
+ (*key)[i%8]^=(str[i]<<1);
+#else /* MIT COMPATIBLE */
+ for (i=0; i<length; i++)
+ {
+ j=str[i];
+ if ((i%16) < 8)
+ (*key)[i%8]^=(j<<1);
+ else
+ {
+ /* Reverse the bit order 05/05/92 eay */
+ j=((j<<4)&0xf0)|((j>>4)&0x0f);
+ j=((j<<2)&0xcc)|((j>>2)&0x33);
+ j=((j<<1)&0xaa)|((j>>1)&0x55);
+ (*key)[7-(i%8)]^=j;
+ }
+ }
+#endif
+ DES_set_odd_parity(key);
+#ifdef EXPERIMENTAL_STR_TO_STRONG_KEY
+ if(DES_is_weak_key(key))
+ (*key)[7] ^= 0xF0;
+ DES_set_key(key,&ks);
+#else
+ DES_set_key_unchecked(key,&ks);
+#endif
+ DES_cbc_cksum((const unsigned char*)str,key,length,&ks,key);
+ OPENSSL_cleanse(&ks,sizeof(ks));
+ DES_set_odd_parity(key);
+ }
+
+void DES_string_to_2keys(const char *str, DES_cblock *key1, DES_cblock *key2)
+ {
+ DES_key_schedule ks;
+ int i,length;
+ register unsigned char j;
+
+ memset(key1,0,8);
+ memset(key2,0,8);
+ length=strlen(str);
+#ifdef OLD_STR_TO_KEY
+ if (length <= 8)
+ {
+ for (i=0; i<length; i++)
+ {
+ (*key2)[i]=(*key1)[i]=(str[i]<<1);
+ }
+ }
+ else
+ {
+ for (i=0; i<length; i++)
+ {
+ if ((i/8)&1)
+ (*key2)[i%8]^=(str[i]<<1);
+ else
+ (*key1)[i%8]^=(str[i]<<1);
+ }
+ }
+#else /* MIT COMPATIBLE */
+ for (i=0; i<length; i++)
+ {
+ j=str[i];
+ if ((i%32) < 16)
+ {
+ if ((i%16) < 8)
+ (*key1)[i%8]^=(j<<1);
+ else
+ (*key2)[i%8]^=(j<<1);
+ }
+ else
+ {
+ j=((j<<4)&0xf0)|((j>>4)&0x0f);
+ j=((j<<2)&0xcc)|((j>>2)&0x33);
+ j=((j<<1)&0xaa)|((j>>1)&0x55);
+ if ((i%16) < 8)
+ (*key1)[7-(i%8)]^=j;
+ else
+ (*key2)[7-(i%8)]^=j;
+ }
+ }
+ if (length <= 8) memcpy(key2,key1,8);
+#endif
+ DES_set_odd_parity(key1);
+ DES_set_odd_parity(key2);
+#ifdef EXPERIMENTAL_STR_TO_STRONG_KEY
+ if(DES_is_weak_key(key1))
+ (*key1)[7] ^= 0xF0;
+ DES_set_key(key1,&ks);
+#else
+ DES_set_key_unchecked(key1,&ks);
+#endif
+ DES_cbc_cksum((const unsigned char*)str,key1,length,&ks,key1);
+#ifdef EXPERIMENTAL_STR_TO_STRONG_KEY
+ if(DES_is_weak_key(key2))
+ (*key2)[7] ^= 0xF0;
+ DES_set_key(key2,&ks);
+#else
+ DES_set_key_unchecked(key2,&ks);
+#endif
+ DES_cbc_cksum((const unsigned char*)str,key2,length,&ks,key2);
+ OPENSSL_cleanse(&ks,sizeof(ks));
+ DES_set_odd_parity(key1);
+ DES_set_odd_parity(key2);
+ }
projects / cassiopeia.git / blobdiff