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Diffstat (limited to 'crypto/des/str2key.c')
| -rw-r--r-- | crypto/des/str2key.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/crypto/des/str2key.c b/crypto/des/str2key.c new file mode 100644 index 0000000000..65a1184653 --- /dev/null +++ b/crypto/des/str2key.c @@ -0,0 +1,171 @@ +/* crypto/des/str2key.c */ +/* Copyright (C) 1995-1997 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 "des_locl.h" + +extern int des_check_key; + +void des_string_to_key(str, key) +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((des_cblock *)key); + i=des_check_key; + des_check_key=0; + des_set_key((des_cblock *)key,ks); + des_check_key=i; + des_cbc_cksum((des_cblock *)str,(des_cblock *)key,(long)length,ks, + (des_cblock *)key); + memset(ks,0,sizeof(ks)); + des_set_odd_parity((des_cblock *)key); + } + +void des_string_to_2keys(str, key1, key2) +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((des_cblock *)key1); + des_set_odd_parity((des_cblock *)key2); + i=des_check_key; + des_check_key=0; + des_set_key((des_cblock *)key1,ks); + des_cbc_cksum((des_cblock *)str,(des_cblock *)key1,(long)length,ks, + (des_cblock *)key1); + des_set_key((des_cblock *)key2,ks); + des_cbc_cksum((des_cblock *)str,(des_cblock *)key2,(long)length,ks, + (des_cblock *)key2); + des_check_key=i; + memset(ks,0,sizeof(ks)); + des_set_odd_parity(key1); + des_set_odd_parity(key2); + } |