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(krb5_DES_string_to_key): If the opaque length it set to 1, and

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content is 0x01, use the afs3 string-to-key.


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@16078 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2005-09-19 22:13:54 +00:00
parent d0af14e4fe
commit ce7c2af147
1 changed files with 72 additions and 62 deletions
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134
lib/krb5/crypto.c
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@@ -188,68 +188,6 @@ krb5_DES_schedule(krb5_context context,
DES_set_key(key->key->keyvalue.data, key->schedule->data); DES_set_key(key->key->keyvalue.data, key->schedule->data);
} }
static void
DES_string_to_key_int(unsigned char *data, size_t length, DES_cblock *key)
{
DES_key_schedule schedule;
int i;
int reverse = 0;
unsigned char *p;
unsigned char swap[] = { 0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf };
memset(key, 0, 8);
p = (unsigned char*)key;
for (i = 0; i < length; i++) {
unsigned char tmp = data[i];
if (!reverse)
*p++ ^= (tmp << 1);
else
*--p ^= (swap[tmp & 0xf] << 4) | swap[(tmp & 0xf0) >> 4];
if((i % 8) == 7)
reverse = !reverse;
}
DES_set_odd_parity(key);
if(DES_is_weak_key(key))
(*key)[7] ^= 0xF0;
DES_set_key(key, &schedule);
DES_cbc_cksum((void*)data, key, length, &schedule, key);
memset(&schedule, 0, sizeof(schedule));
DES_set_odd_parity(key);
if(DES_is_weak_key(key))
(*key)[7] ^= 0xF0;
}
static krb5_error_code
krb5_DES_string_to_key(krb5_context context,
krb5_enctype enctype,
krb5_data password,
krb5_salt salt,
krb5_data opaque,
krb5_keyblock *key)
{
unsigned char *s;
size_t len;
DES_cblock tmp;
len = password.length + salt.saltvalue.length;
s = malloc(len);
if(len > 0 && s == NULL) {
krb5_set_error_string(context, "malloc: out of memory");
return ENOMEM;
}
memcpy(s, password.data, password.length);
memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
DES_string_to_key_int(s, len, &tmp);
key->keytype = enctype;
krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
memset(&tmp, 0, sizeof(tmp));
memset(s, 0, len);
free(s);
return 0;
}
#ifdef ENABLE_AFS_STRING_TO_KEY #ifdef ENABLE_AFS_STRING_TO_KEY
/* This defines the Andrew string_to_key function. It accepts a password /* This defines the Andrew string_to_key function. It accepts a password
@@ -349,6 +287,78 @@ DES_AFS3_string_to_key(krb5_context context,
} }
#endif /* ENABLE_AFS_STRING_TO_KEY */ #endif /* ENABLE_AFS_STRING_TO_KEY */
static void
DES_string_to_key_int(unsigned char *data, size_t length, DES_cblock *key)
{
DES_key_schedule schedule;
int i;
int reverse = 0;
unsigned char *p;
unsigned char swap[] = { 0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf };
memset(key, 0, 8);
p = (unsigned char*)key;
for (i = 0; i < length; i++) {
unsigned char tmp = data[i];
if (!reverse)
*p++ ^= (tmp << 1);
else
*--p ^= (swap[tmp & 0xf] << 4) | swap[(tmp & 0xf0) >> 4];
if((i % 8) == 7)
reverse = !reverse;
}
DES_set_odd_parity(key);
if(DES_is_weak_key(key))
(*key)[7] ^= 0xF0;
DES_set_key(key, &schedule);
DES_cbc_cksum((void*)data, key, length, &schedule, key);
memset(&schedule, 0, sizeof(schedule));
DES_set_odd_parity(key);
if(DES_is_weak_key(key))
(*key)[7] ^= 0xF0;
}
static krb5_error_code
krb5_DES_string_to_key(krb5_context context,
krb5_enctype enctype,
krb5_data password,
krb5_salt salt,
krb5_data opaque,
krb5_keyblock *key)
{
unsigned char *s;
size_t len;
DES_cblock tmp;
#ifdef ENABLE_AFS_STRING_TO_KEY
if (opaque.length == 1) {
unsigned long v;
_krb5_get_int(opaque.data, &v, 1);
if (v == 1)
return DES_AFS3_string_to_key(context, enctype, password,
salt, opaque, key);
}
#endif
len = password.length + salt.saltvalue.length;
s = malloc(len);
if(len > 0 && s == NULL) {
krb5_set_error_string(context, "malloc: out of memory");
return ENOMEM;
}
memcpy(s, password.data, password.length);
memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
DES_string_to_key_int(s, len, &tmp);
key->keytype = enctype;
krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
memset(&tmp, 0, sizeof(tmp));
memset(s, 0, len);
free(s);
return 0;
}
static void static void
krb5_DES_random_to_key(krb5_context context, krb5_DES_random_to_key(krb5_context context,
krb5_keyblock *key, krb5_keyblock *key,