/* This defines the Andrew string_to_key function. It accepts a password * string as input and converts its via a one-way encryption algorithm to a DES * encryption key. It is compatible with the original Andrew authentication * service password database. */ #include "krb_locl.h" RCSID("$Id: str2key.c,v 1.10 1997/03/23 03:53:19 joda Exp $"); static void mklower(char *s) { for (; *s; s++) if ('A' <= *s && *s <= 'Z') *s = *s - 'A' + 'a'; } /* * Short passwords, i.e 8 characters or less. */ static void afs_cmu_StringToKey (char *str, char *cell, des_cblock *key) { char password[8+1]; /* crypt is limited to 8 chars anyway */ int i; int passlen; memset (key, 0, sizeof(key)); memset(password, 0, sizeof(password)); strncpy (password, cell, 8); passlen = strlen (str); if (passlen > 8) passlen = 8; for (i=0; i sizeof(password)) passlen = sizeof(password); memcpy(&ivec, "kerberos", 8); memcpy(&temp_key, "kerberos", 8); des_fixup_key_parity (&temp_key); des_key_sched (&temp_key, schedule); des_cbc_cksum ((des_cblock *)password, &ivec, passlen, schedule, &ivec); memcpy(&temp_key, &ivec, 8); des_fixup_key_parity (&temp_key); des_key_sched (&temp_key, schedule); des_cbc_cksum ((des_cblock *)password, key, passlen, schedule, &ivec); des_fixup_key_parity (key); } void afs_string_to_key(char *str, char *cell, des_cblock *key) { char realm[REALM_SZ+1]; strncpy(realm, cell, REALM_SZ); realm[REALM_SZ] = 0; mklower(realm); if (strlen(str) > 8) afs_transarc_StringToKey (str, realm, key); else afs_cmu_StringToKey (str, realm, key); }