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Diffstat (limited to 'openssl/crypto/des/str2key.c')
| -rw-r--r-- | openssl/crypto/des/str2key.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/openssl/crypto/des/str2key.c b/openssl/crypto/des/str2key.c new file mode 100644 index 0000000..38a478c --- /dev/null +++ b/openssl/crypto/des/str2key.c @@ -0,0 +1,164 @@ +/* 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); +} |