diff options
Diffstat (limited to 'crypto/kerberosIV/lib/krb/str2key.c')
| -rw-r--r-- | crypto/kerberosIV/lib/krb/str2key.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/crypto/kerberosIV/lib/krb/str2key.c b/crypto/kerberosIV/lib/krb/str2key.c new file mode 100644 index 0000000..4ef4c57 --- /dev/null +++ b/crypto/kerberosIV/lib/krb/str2key.c @@ -0,0 +1,105 @@ +/* + * Copyright (c) 1999 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * 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 above 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. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE 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. + */ + +#include "krb_locl.h" + +RCSID("$Id: str2key.c,v 1.17 1999/12/02 16:58:44 joda Exp $"); + +#define lowcase(c) (('A' <= (c) && (c) <= 'Z') ? ((c) - 'A' + 'a') : (c)) + +/* + * The string to key function used by Transarc AFS. + */ +void +afs_string_to_key(const char *pass, const char *cell, des_cblock *key) +{ + if (strlen(pass) <= 8) /* Short passwords. */ + { + char buf[8 + 1], *s; + int i; + + /* + * XOR cell and password and pad (or fill) with 'X' to length 8, + * then use crypt(3) to create DES key. + */ + for (i = 0; i < 8; i++) + { + buf[i] = *pass ^ lowcase(*cell); + if (buf[i] == 0) + buf[i] = 'X'; + if (*pass != 0) + pass++; + if (*cell != 0) + cell++; + } + buf[8] = 0; + + s = crypt(buf, "p1"); /* Result from crypt is 7bit chars. */ + s = s + 2; /* Skip 2 chars of salt. */ + for (i = 0; i < 8; i++) + ((char *) key)[i] = s[i] << 1; /* High bit is always zero */ + des_fixup_key_parity(key); /* Low bit is parity */ + } + else /* Long passwords */ + { + int plen, clen; + char *buf, *t; + des_key_schedule sched; + des_cblock ivec; + + /* + * Concatenate password with cell name, + * then checksum twice to create DES key. + */ + plen = strlen(pass); + clen = strlen(cell); + buf = malloc(plen + clen + 1); + memcpy(buf, pass, plen); + for (t = buf + plen; *cell != 0; t++, cell++) + *t = lowcase(*cell); + + memcpy(&ivec, "kerberos", 8); + memcpy(key, "kdsbdsns", 8); + des_key_sched(key, sched); + /* Beware, ivec is passed twice */ + des_cbc_cksum((des_cblock *)buf, &ivec, plen + clen, sched, &ivec); + + memcpy(key, &ivec, 8); + des_fixup_key_parity(key); + des_key_sched(key, sched); + /* Beware, ivec is passed twice */ + des_cbc_cksum((des_cblock *)buf, key, plen + clen, sched, &ivec); + free(buf); + des_fixup_key_parity(key); + } +} |
