static krb5_error_code
add_enctype_to_key_set(Key **key_set, size_t *nkeyset,
krb5_enctype enctype, krb5_salt *salt)
{
krb5_error_code ret;
Key key, *tmp;
memset(&key, 0, sizeof(key));
tmp = realloc(*key_set, (*nkeyset + 1) * sizeof((*key_set)[0]));
if (tmp == NULL)
return ENOMEM;
*key_set = tmp;
key.key.keytype = enctype;
key.key.keyvalue.length = 0;
key.key.keyvalue.data = NULL;
if (salt) {
key.salt = calloc(1, sizeof(*key.salt));
if (key.salt == NULL) {
free_Key(&key);
return ENOMEM;
}
key.salt->type = salt->salttype;
krb5_data_zero (&key.salt->salt);
ret = krb5_data_copy(&key.salt->salt,
salt->saltvalue.data,
salt->saltvalue.length);
if (ret) {
free_Key(&key);
return ret;
}
} else
key.salt = NULL;
(*key_set)[*nkeyset] = key;
*nkeyset += 1;
return 0;
}
void
hdb_free_key(Key *key)
{
memset(key->key.keyvalue.data,
0,
key->key.keyvalue.length);
free_Key(key);
free(key);
}
kadm5_ret_t
kadm5_log_replay_modify (kadm5_server_context *context,
u_int32_t ver,
u_int32_t len,
krb5_storage *sp)
{
krb5_error_code ret;
int32_t mask;
krb5_data value;
hdb_entry ent, log_ent;
krb5_ret_int32 (sp, &mask);
len -= 4;
ret = krb5_data_alloc (&value, len);
if (ret)
return ret;
krb5_storage_read (sp, value.data, len);
ret = hdb_value2entry (context->context, &value, &log_ent);
krb5_data_free(&value);
if (ret)
return ret;
ent.principal = log_ent.principal;
log_ent.principal = NULL;
ret = context->db->hdb_fetch(context->context, context->db,
HDB_F_DECRYPT, &ent);
if (ret)
return ret;
if (mask & KADM5_PRINC_EXPIRE_TIME) {
if (log_ent.valid_end == NULL) {
ent.valid_end = NULL;
} else {
if (ent.valid_end == NULL)
ent.valid_end = malloc(sizeof(*ent.valid_end));
*ent.valid_end = *log_ent.valid_end;
}
}
if (mask & KADM5_PW_EXPIRATION) {
if (log_ent.pw_end == NULL) {
ent.pw_end = NULL;
} else {
if (ent.pw_end == NULL)
ent.pw_end = malloc(sizeof(*ent.pw_end));
*ent.pw_end = *log_ent.pw_end;
}
}
if (mask & KADM5_LAST_PWD_CHANGE) {
abort (); /* XXX */
}
if (mask & KADM5_ATTRIBUTES) {
ent.flags = log_ent.flags;
}
if (mask & KADM5_MAX_LIFE) {
if (log_ent.max_life == NULL) {
ent.max_life = NULL;
} else {
if (ent.max_life == NULL)
ent.max_life = malloc (sizeof(*ent.max_life));
*ent.max_life = *log_ent.max_life;
}
}
if ((mask & KADM5_MOD_TIME) && (mask & KADM5_MOD_NAME)) {
if (ent.modified_by == NULL) {
ent.modified_by = malloc(sizeof(*ent.modified_by));
} else
free_Event(ent.modified_by);
copy_Event(log_ent.modified_by, ent.modified_by);
}
if (mask & KADM5_KVNO) {
ent.kvno = log_ent.kvno;
}
if (mask & KADM5_MKVNO) {
abort (); /* XXX */
}
if (mask & KADM5_AUX_ATTRIBUTES) {
abort (); /* XXX */
}
if (mask & KADM5_POLICY) {
abort (); /* XXX */
}
if (mask & KADM5_POLICY_CLR) {
abort (); /* XXX */
}
if (mask & KADM5_MAX_RLIFE) {
if (log_ent.max_renew == NULL) {
ent.max_renew = NULL;
} else {
if (ent.max_renew == NULL)
ent.max_renew = malloc (sizeof(*ent.max_renew));
*ent.max_renew = *log_ent.max_renew;
}
}
if (mask & KADM5_LAST_SUCCESS) {
abort (); /* XXX */
}
if (mask & KADM5_LAST_FAILED) {
abort (); /* XXX */
}
if (mask & KADM5_FAIL_AUTH_COUNT) {
abort (); /* XXX */
}
if (mask & KADM5_KEY_DATA) {
size_t len;
int i;
for (i = 0; i < ent.keys.len; ++i)
free_Key(&ent.keys.val[i]);
free (ent.keys.val);
len = log_ent.keys.len;
ent.keys.len = len;
ent.keys.val = malloc(len * sizeof(*ent.keys.val));
for (i = 0; i < ent.keys.len; ++i)
copy_Key(&log_ent.keys.val[i],
&ent.keys.val[i]);
}
ret = context->db->hdb_store(context->context, context->db,
HDB_F_REPLACE, &ent);
hdb_free_entry (context->context, &ent);
hdb_free_entry (context->context, &log_ent);
return ret;
}
static kadm5_ret_t
kadm5_log_replay_modify (kadm5_server_context *context,
uint32_t ver,
uint32_t len,
krb5_storage *sp)
{
krb5_error_code ret;
int32_t mask;
krb5_data value;
hdb_entry_ex ent, log_ent;
memset(&log_ent, 0, sizeof(log_ent));
krb5_ret_int32 (sp, &mask);
len -= 4;
ret = krb5_data_alloc (&value, len);
if (ret) {
krb5_set_error_message(context->context, ret, "out of memory");
return ret;
}
krb5_storage_read (sp, value.data, len);
ret = hdb_value2entry (context->context, &value, &log_ent.entry);
krb5_data_free(&value);
if (ret)
return ret;
memset(&ent, 0, sizeof(ent));
ret = context->db->hdb_fetch_kvno(context->context, context->db,
log_ent.entry.principal,
HDB_F_DECRYPT|HDB_F_GET_ANY|HDB_F_ADMIN_DATA, 0, &ent);
if (ret)
goto out;
if (mask & KADM5_PRINC_EXPIRE_TIME) {
if (log_ent.entry.valid_end == NULL) {
ent.entry.valid_end = NULL;
} else {
if (ent.entry.valid_end == NULL) {
ent.entry.valid_end = malloc(sizeof(*ent.entry.valid_end));
if (ent.entry.valid_end == NULL) {
ret = ENOMEM;
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
}
*ent.entry.valid_end = *log_ent.entry.valid_end;
}
}
if (mask & KADM5_PW_EXPIRATION) {
if (log_ent.entry.pw_end == NULL) {
ent.entry.pw_end = NULL;
} else {
if (ent.entry.pw_end == NULL) {
ent.entry.pw_end = malloc(sizeof(*ent.entry.pw_end));
if (ent.entry.pw_end == NULL) {
ret = ENOMEM;
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
}
*ent.entry.pw_end = *log_ent.entry.pw_end;
}
}
if (mask & KADM5_LAST_PWD_CHANGE) {
abort (); /* XXX */
}
if (mask & KADM5_ATTRIBUTES) {
ent.entry.flags = log_ent.entry.flags;
}
if (mask & KADM5_MAX_LIFE) {
if (log_ent.entry.max_life == NULL) {
ent.entry.max_life = NULL;
} else {
if (ent.entry.max_life == NULL) {
ent.entry.max_life = malloc (sizeof(*ent.entry.max_life));
if (ent.entry.max_life == NULL) {
ret = ENOMEM;
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
}
*ent.entry.max_life = *log_ent.entry.max_life;
}
}
if ((mask & KADM5_MOD_TIME) && (mask & KADM5_MOD_NAME)) {
if (ent.entry.modified_by == NULL) {
ent.entry.modified_by = malloc(sizeof(*ent.entry.modified_by));
if (ent.entry.modified_by == NULL) {
ret = ENOMEM;
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
} else
free_Event(ent.entry.modified_by);
ret = copy_Event(log_ent.entry.modified_by, ent.entry.modified_by);
if (ret) {
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
}
if (mask & KADM5_KVNO) {
ent.entry.kvno = log_ent.entry.kvno;
}
if (mask & KADM5_MKVNO) {
abort (); /* XXX */
}
if (mask & KADM5_AUX_ATTRIBUTES) {
abort (); /* XXX */
}
if (mask & KADM5_POLICY) {
abort (); /* XXX */
}
if (mask & KADM5_POLICY_CLR) {
abort (); /* XXX */
}
if (mask & KADM5_MAX_RLIFE) {
if (log_ent.entry.max_renew == NULL) {
ent.entry.max_renew = NULL;
} else {
if (ent.entry.max_renew == NULL) {
ent.entry.max_renew = malloc (sizeof(*ent.entry.max_renew));
if (ent.entry.max_renew == NULL) {
ret = ENOMEM;
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
}
*ent.entry.max_renew = *log_ent.entry.max_renew;
}
}
if (mask & KADM5_LAST_SUCCESS) {
abort (); /* XXX */
}
if (mask & KADM5_LAST_FAILED) {
abort (); /* XXX */
}
if (mask & KADM5_FAIL_AUTH_COUNT) {
abort (); /* XXX */
}
if (mask & KADM5_KEY_DATA) {
size_t num;
int i;
for (i = 0; i < ent.entry.keys.len; ++i)
free_Key(&ent.entry.keys.val[i]);
free (ent.entry.keys.val);
num = log_ent.entry.keys.len;
ent.entry.keys.len = num;
ent.entry.keys.val = malloc(len * sizeof(*ent.entry.keys.val));
if (ent.entry.keys.val == NULL) {
krb5_set_error_message(context->context, ENOMEM, "out of memory");
return ENOMEM;
}
for (i = 0; i < ent.entry.keys.len; ++i) {
ret = copy_Key(&log_ent.entry.keys.val[i],
&ent.entry.keys.val[i]);
if (ret) {
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
}
}
if ((mask & KADM5_TL_DATA) && log_ent.entry.extensions) {
HDB_extensions *es = ent.entry.extensions;
ent.entry.extensions = calloc(1, sizeof(*ent.entry.extensions));
if (ent.entry.extensions == NULL)
goto out;
ret = copy_HDB_extensions(log_ent.entry.extensions,
ent.entry.extensions);
if (ret) {
krb5_set_error_message(context->context, ret, "out of memory");
free(ent.entry.extensions);
ent.entry.extensions = es;
goto out;
}
if (es) {
free_HDB_extensions(es);
free(es);
}
}
ret = context->db->hdb_store(context->context, context->db,
HDB_F_REPLACE, &ent);
out:
hdb_free_entry (context->context, &ent);
hdb_free_entry (context->context, &log_ent);
return ret;
}
krb5_error_code
hdb_generate_key_set(krb5_context context, krb5_principal principal,
Key **ret_key_set, size_t *nkeyset, int no_salt)
{
char **ktypes, **kp;
krb5_error_code ret;
Key *k, *key_set;
size_t i, j;
static const char *default_keytypes[] = {
"aes256-cts-hmac-sha1-96:pw-salt",
"des3-cbc-sha1:pw-salt",
"arcfour-hmac-md5:pw-salt",
NULL
};
ktypes = krb5_config_get_strings(context, NULL, "kadmin",
"default_keys", NULL);
if (ktypes == NULL)
ktypes = (char **)(intptr_t)default_keytypes;
*ret_key_set = key_set = NULL;
*nkeyset = 0;
ret = 0;
for(kp = ktypes; kp && *kp; kp++) {
const char *p;
krb5_salt salt;
krb5_enctype *enctypes;
size_t num_enctypes;
p = *kp;
/* check alias */
if(strcmp(p, "v5") == 0)
p = "pw-salt";
else if(strcmp(p, "v4") == 0)
p = "des:pw-salt:";
else if(strcmp(p, "afs") == 0 || strcmp(p, "afs3") == 0)
p = "des:afs3-salt";
else if (strcmp(p, "arcfour-hmac-md5") == 0)
p = "arcfour-hmac-md5:pw-salt";
memset(&salt, 0, sizeof(salt));
ret = parse_key_set(context, p,
&enctypes, &num_enctypes, &salt, principal);
if (ret) {
krb5_warn(context, ret, "bad value for default_keys `%s'", *kp);
ret = 0;
continue;
}
for (i = 0; i < num_enctypes; i++) {
/* find duplicates */
for (j = 0; j < *nkeyset; j++) {
k = &key_set[j];
if (k->key.keytype == enctypes[i]) {
if (no_salt)
break;
if (k->salt == NULL && salt.salttype == KRB5_PW_SALT)
break;
if (k->salt->type == salt.salttype &&
k->salt->salt.length == salt.saltvalue.length &&
memcmp(k->salt->salt.data, salt.saltvalue.data,
salt.saltvalue.length) == 0)
break;
}
}
/* not a duplicate, lets add it */
if (j == *nkeyset) {
ret = add_enctype_to_key_set(&key_set, nkeyset, enctypes[i],
no_salt ? NULL : &salt);
if (ret) {
free(enctypes);
krb5_free_salt(context, salt);
goto out;
}
}
}
free(enctypes);
krb5_free_salt(context, salt);
}
*ret_key_set = key_set;
out:
if (ktypes != (char **)(intptr_t)default_keytypes)
krb5_config_free_strings(ktypes);
if (ret) {
krb5_warn(context, ret,
"failed to parse the [kadmin]default_keys values");
for (i = 0; i < *nkeyset; i++)
free_Key(&key_set[i]);
free(key_set);
} else if (*nkeyset == 0) {
krb5_warnx(context,
"failed to parse any of the [kadmin]default_keys values");
ret = EINVAL; /* XXX */
}
return ret;
}
static kadm5_ret_t
kadm5_log_replay_modify (kadm5_server_context *context,
uint32_t ver,
uint32_t len,
krb5_storage *sp)
{
krb5_error_code ret;
int32_t mask;
krb5_data value;
hdb_entry_ex ent, log_ent;
memset(&log_ent, 0, sizeof(log_ent));
krb5_ret_int32 (sp, &mask);
len -= 4;
ret = krb5_data_alloc (&value, len);
if (ret) {
krb5_set_error_message(context->context, ret, "out of memory");
return ret;
}
krb5_storage_read (sp, value.data, len);
ret = hdb_value2entry (context->context, &value, &log_ent.entry);
krb5_data_free(&value);
if (ret)
return ret;
memset(&ent, 0, sizeof(ent));
ret = context->db->hdb_fetch_kvno(context->context, context->db,
log_ent.entry.principal,
HDB_F_DECRYPT|HDB_F_ALL_KVNOS|
HDB_F_GET_ANY|HDB_F_ADMIN_DATA, 0, &ent);
if (ret)
goto out;
if (mask & KADM5_PRINC_EXPIRE_TIME) {
if (log_ent.entry.valid_end == NULL) {
ent.entry.valid_end = NULL;
} else {
if (ent.entry.valid_end == NULL) {
ent.entry.valid_end = malloc(sizeof(*ent.entry.valid_end));
if (ent.entry.valid_end == NULL) {
ret = ENOMEM;
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
}
*ent.entry.valid_end = *log_ent.entry.valid_end;
}
}
if (mask & KADM5_PW_EXPIRATION) {
if (log_ent.entry.pw_end == NULL) {
ent.entry.pw_end = NULL;
} else {
if (ent.entry.pw_end == NULL) {
ent.entry.pw_end = malloc(sizeof(*ent.entry.pw_end));
if (ent.entry.pw_end == NULL) {
ret = ENOMEM;
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
}
*ent.entry.pw_end = *log_ent.entry.pw_end;
}
}
if (mask & KADM5_LAST_PWD_CHANGE) {
abort (); /* XXX */
}
if (mask & KADM5_ATTRIBUTES) {
ent.entry.flags = log_ent.entry.flags;
}
if (mask & KADM5_MAX_LIFE) {
if (log_ent.entry.max_life == NULL) {
ent.entry.max_life = NULL;
} else {
if (ent.entry.max_life == NULL) {
ent.entry.max_life = malloc (sizeof(*ent.entry.max_life));
if (ent.entry.max_life == NULL) {
ret = ENOMEM;
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
}
*ent.entry.max_life = *log_ent.entry.max_life;
}
}
if ((mask & KADM5_MOD_TIME) && (mask & KADM5_MOD_NAME)) {
if (ent.entry.modified_by == NULL) {
ent.entry.modified_by = malloc(sizeof(*ent.entry.modified_by));
if (ent.entry.modified_by == NULL) {
ret = ENOMEM;
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
} else
free_Event(ent.entry.modified_by);
ret = copy_Event(log_ent.entry.modified_by, ent.entry.modified_by);
if (ret) {
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
}
if (mask & KADM5_KVNO) {
ent.entry.kvno = log_ent.entry.kvno;
}
if (mask & KADM5_MKVNO) {
abort (); /* XXX */
}
if (mask & KADM5_AUX_ATTRIBUTES) {
abort (); /* XXX */
}
if (mask & KADM5_POLICY) {
abort (); /* XXX */
}
if (mask & KADM5_POLICY_CLR) {
abort (); /* XXX */
}
if (mask & KADM5_MAX_RLIFE) {
if (log_ent.entry.max_renew == NULL) {
ent.entry.max_renew = NULL;
} else {
if (ent.entry.max_renew == NULL) {
ent.entry.max_renew = malloc (sizeof(*ent.entry.max_renew));
if (ent.entry.max_renew == NULL) {
ret = ENOMEM;
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
}
*ent.entry.max_renew = *log_ent.entry.max_renew;
}
}
if (mask & KADM5_LAST_SUCCESS) {
abort (); /* XXX */
}
if (mask & KADM5_LAST_FAILED) {
abort (); /* XXX */
}
if (mask & KADM5_FAIL_AUTH_COUNT) {
abort (); /* XXX */
}
if (mask & KADM5_KEY_DATA) {
size_t num;
size_t i;
/*
* We don't need to do anything about key history here because
* we always log KADM5_TL_DATA when we change keys/passwords, so
* the code below this will handle key history implicitly.
* However, if we had to, the code to handle key history here
* would look like this:
*
* HDB_extension *ext;
* ...
* ext = hdb_find_extension(&log_ent.entry,
* choice_HDB_extension_data_hist_keys);
* if (ext);
* ret = hdb_replace_extension(context->context, &ent.entry, ext);
* else
* ret = hdb_clear_extension(context->context, &ent.entry,
* choice_HDB_extension_data_hist_keys);
*
* Maybe we should do this here anyways, wasteful as it would
* be, as a defensive programming measure? For now we heim_assert().
*/
heim_assert((mask & KADM5_TL_DATA),
"Wouldn't log and replay key history");
for (i = 0; i < ent.entry.keys.len; ++i)
free_Key(&ent.entry.keys.val[i]);
free (ent.entry.keys.val);
num = log_ent.entry.keys.len;
ent.entry.keys.len = num;
ent.entry.keys.val = malloc(len * sizeof(*ent.entry.keys.val));
if (ent.entry.keys.val == NULL) {
krb5_set_error_message(context->context, ENOMEM, "out of memory");
return ENOMEM;
}
for (i = 0; i < ent.entry.keys.len; ++i) {
ret = copy_Key(&log_ent.entry.keys.val[i],
&ent.entry.keys.val[i]);
if (ret) {
krb5_set_error_message(context->context, ret, "out of memory");
goto out;
}
}
}
if ((mask & KADM5_TL_DATA) && log_ent.entry.extensions) {
HDB_extensions *es = ent.entry.extensions;
ent.entry.extensions = calloc(1, sizeof(*ent.entry.extensions));
if (ent.entry.extensions == NULL)
goto out;
ret = copy_HDB_extensions(log_ent.entry.extensions,
ent.entry.extensions);
if (ret) {
krb5_set_error_message(context->context, ret, "out of memory");
free(ent.entry.extensions);
ent.entry.extensions = es;
goto out;
}
if (es) {
free_HDB_extensions(es);
free(es);
}
}
ret = context->db->hdb_store(context->context, context->db,
HDB_F_REPLACE, &ent);
out:
hdb_free_entry (context->context, &ent);
hdb_free_entry (context->context, &log_ent);
return ret;
}
static krb5_error_code
mdb_value2entry(krb5_context context, krb5_data *data, hdb_entry *entry)
{
krb5_error_code ret;
krb5_storage *sp;
uint32_t u32;
uint16_t u16, num_keys, num_tl;
size_t i, j;
char *p = NULL;
sp = krb5_storage_from_data(data);
if (sp == NULL) {
krb5_set_error_message(context, ENOMEM, "out of memory");
return ENOMEM;
}
krb5_storage_set_byteorder(sp, KRB5_STORAGE_BYTEORDER_LE);
/* 16: baselength */
CHECK(ret = krb5_ret_uint16(sp, &u16));
if (u16 != KDB_V1_BASE_LENGTH) { ret = EINVAL; goto out; }
/* 32: attributes */
CHECK(ret = krb5_ret_uint32(sp, &u32));
entry->flags.postdate = !(u16 & KRB5_KDB_DISALLOW_POSTDATED);
entry->flags.forwardable = !(u16 & KRB5_KDB_DISALLOW_FORWARDABLE);
entry->flags.initial = !!(u16 & KRB5_KDB_DISALLOW_TGT_BASED);
entry->flags.renewable = !(u16 & KRB5_KDB_DISALLOW_RENEWABLE);
entry->flags.proxiable = !(u16 & KRB5_KDB_DISALLOW_PROXIABLE);
/* DUP_SKEY */
entry->flags.invalid = !!(u16 & KRB5_KDB_DISALLOW_ALL_TIX);
entry->flags.require_preauth =!!(u16 & KRB5_KDB_REQUIRES_PRE_AUTH);
entry->flags.require_hwauth =!!(u16 & KRB5_KDB_REQUIRES_HW_AUTH);
entry->flags.server = !(u16 & KRB5_KDB_DISALLOW_SVR);
entry->flags.change_pw = !!(u16 & KRB5_KDB_PWCHANGE_SERVICE);
entry->flags.client = 1; /* XXX */
/* 32: max time */
CHECK(ret = krb5_ret_uint32(sp, &u32));
if (u32) {
entry->max_life = malloc(sizeof(*entry->max_life));
*entry->max_life = u32;
}
/* 32: max renewable time */
CHECK(ret = krb5_ret_uint32(sp, &u32));
if (u32) {
entry->max_renew = malloc(sizeof(*entry->max_renew));
*entry->max_renew = u32;
}
/* 32: client expire */
CHECK(ret = krb5_ret_uint32(sp, &u32));
if (u32) {
entry->valid_end = malloc(sizeof(*entry->valid_end));
*entry->valid_end = u32;
}
/* 32: passwd expire */
CHECK(ret = krb5_ret_uint32(sp, &u32));
if (u32) {
entry->pw_end = malloc(sizeof(*entry->pw_end));
*entry->pw_end = u32;
}
/* 32: last successful passwd */
CHECK(ret = krb5_ret_uint32(sp, &u32));
/* 32: last failed attempt */
CHECK(ret = krb5_ret_uint32(sp, &u32));
/* 32: num of failed attempts */
CHECK(ret = krb5_ret_uint32(sp, &u32));
/* 16: num tl data */
CHECK(ret = krb5_ret_uint16(sp, &u16));
num_tl = u16;
/* 16: num key data */
CHECK(ret = krb5_ret_uint16(sp, &u16));
num_keys = u16;
/* 16: principal length */
CHECK(ret = krb5_ret_uint16(sp, &u16));
/* length: principal */
{
p = malloc(u16 + 1);
krb5_storage_read(sp, p, u16);
p[u16] = '\0';
CHECK(ret = krb5_parse_name(context, p, &entry->principal));
free(p); p = NULL;
}
/* for num tl data times
16: tl data type
16: tl data length
length: length */
for (i = 0; i < num_tl; i++) {
CHECK(ret = krb5_ret_uint16(sp, &u16));
CHECK(ret = krb5_ret_uint16(sp, &u16));
krb5_storage_seek(sp, u16, SEEK_CUR);
}
/* for num key data times
16: version (num keyblocks)
16: kvno
for version times:
16: type
16: length
length: keydata */
for (i = 0; i < num_keys; i++) {
int keep = 0;
uint16_t version;
void *ptr;
CHECK(ret = krb5_ret_uint16(sp, &u16));
version = u16;
CHECK(ret = krb5_ret_uint16(sp, &u16));
if (entry->kvno < u16) {
keep = 1;
entry->kvno = u16;
for (j = 0; j < entry->keys.len; j++) {
free_Key(&entry->keys.val[j]);
free(entry->keys.val);
entry->keys.len = 0;
entry->keys.val = NULL;
}
} else if (entry->kvno == u16)
keep = 1;
if (keep) {
Key *k;
ptr = realloc(entry->keys.val, sizeof(entry->keys.val[0]) * (entry->keys.len + 1));
if (ptr == NULL) {
ret = ENOMEM;
goto out;
}
entry->keys.val = ptr;
/* k points to current Key */
k = &entry->keys.val[entry->keys.len];
memset(k, 0, sizeof(*k));
entry->keys.len += 1;
entry->keys.val[i].mkvno = malloc(sizeof(*entry->keys.val[i].mkvno));
if (entry->keys.val[i].mkvno == NULL) {
ret = ENOMEM;
goto out;
}
*entry->keys.val[i].mkvno = 1;
for (j = 0; j < version; j++) {
uint16_t type;
CHECK(ret = krb5_ret_uint16(sp, &type));
CHECK(ret = krb5_ret_uint16(sp, &u16));
if (j == 0) { /* key */
k->key.keytype = type;
if (u16 < 2) {
ret = EINVAL;
goto out;
}
krb5_storage_seek(sp, 2, SEEK_CUR); /* skip real length */
k->key.keyvalue.length = u16 - 2;
k->key.keyvalue.data = malloc(k->key.keyvalue.length);
krb5_storage_read(sp, k->key.keyvalue.data, k->key.keyvalue.length);
} else if (j == 1) { /* salt */
k->salt = calloc(1, sizeof(*k->salt));
if (k->salt == NULL) {
ret = ENOMEM;
goto out;
}
k->salt->type = type;
if (u16 != 0) {
k->salt->salt.data = malloc(u16);
if (k->salt->salt.data == NULL) {
ret = ENOMEM;
goto out;
}
k->salt->salt.length = u16;
krb5_storage_read(sp, k->salt->salt.data, k->salt->salt.length);
}
fix_salt(context, entry, entry->keys.len - 1);
} else {
krb5_storage_seek(sp, u16, SEEK_CUR);
}
}
} else {
/* skip */
for (j = 0; j < version; j++) {
CHECK(ret = krb5_ret_uint16(sp, &u16));
CHECK(ret = krb5_ret_uint16(sp, &u16));
krb5_storage_seek(sp, u16, u16);
}
}
}
return 0;
out:
if (p)
free(p);
free_hdb_entry(entry);
return ret;
}
static krb5_error_code
mdb_value2entry(krb5_context context, krb5_data *data, krb5_kvno kvno, hdb_entry *entry)
{
krb5_error_code ret;
krb5_storage *sp;
uint32_t u32;
uint16_t u16, num_keys, num_tl;
size_t i, j;
char *p;
sp = krb5_storage_from_data(data);
if (sp == NULL) {
krb5_set_error_message(context, ENOMEM, "out of memory");
return ENOMEM;
}
krb5_storage_set_byteorder(sp, KRB5_STORAGE_BYTEORDER_LE);
/*
* 16: baselength
*
* The story here is that these 16 bits have to be a constant:
* KDB_V1_BASE_LENGTH. Once upon a time a different value here
* would have been used to indicate the presence of "extra data"
* between the "base" contents and the {principal name, TL data,
* keys} that follow it. Nothing supports such "extra data"
* nowadays, so neither do we here.
*
* XXX But... surely we ought to log about this extra data, or skip
* it, or something, in case anyone has MIT KDBs with ancient
* entries in them... Logging would allow the admin to know which
* entries to dump with MIT krb5's kdb5_util.
*/
CHECK(ret = krb5_ret_uint16(sp, &u16));
if (u16 != KDB_V1_BASE_LENGTH) {
ret = EINVAL;
goto out;
}
/* 32: attributes */
CHECK(ret = krb5_ret_uint32(sp, &u32));
entry->flags.postdate = !(u32 & KRB5_KDB_DISALLOW_POSTDATED);
entry->flags.forwardable = !(u32 & KRB5_KDB_DISALLOW_FORWARDABLE);
entry->flags.initial = !!(u32 & KRB5_KDB_DISALLOW_TGT_BASED);
entry->flags.renewable = !(u32 & KRB5_KDB_DISALLOW_RENEWABLE);
entry->flags.proxiable = !(u32 & KRB5_KDB_DISALLOW_PROXIABLE);
/* DUP_SKEY */
entry->flags.invalid = !!(u32 & KRB5_KDB_DISALLOW_ALL_TIX);
entry->flags.require_preauth =!!(u32 & KRB5_KDB_REQUIRES_PRE_AUTH);
entry->flags.require_hwauth =!!(u32 & KRB5_KDB_REQUIRES_HW_AUTH);
entry->flags.server = !(u32 & KRB5_KDB_DISALLOW_SVR);
entry->flags.change_pw = !!(u32 & KRB5_KDB_PWCHANGE_SERVICE);
entry->flags.client = 1; /* XXX */
/* 32: max time */
CHECK(ret = krb5_ret_uint32(sp, &u32));
if (u32) {
entry->max_life = malloc(sizeof(*entry->max_life));
*entry->max_life = u32;
}
/* 32: max renewable time */
CHECK(ret = krb5_ret_uint32(sp, &u32));
if (u32) {
entry->max_renew = malloc(sizeof(*entry->max_renew));
*entry->max_renew = u32;
}
/* 32: client expire */
CHECK(ret = krb5_ret_uint32(sp, &u32));
if (u32) {
entry->valid_end = malloc(sizeof(*entry->valid_end));
*entry->valid_end = u32;
}
/* 32: passwd expire */
CHECK(ret = krb5_ret_uint32(sp, &u32));
if (u32) {
entry->pw_end = malloc(sizeof(*entry->pw_end));
*entry->pw_end = u32;
}
/* 32: last successful passwd */
CHECK(ret = krb5_ret_uint32(sp, &u32));
/* 32: last failed attempt */
CHECK(ret = krb5_ret_uint32(sp, &u32));
/* 32: num of failed attempts */
CHECK(ret = krb5_ret_uint32(sp, &u32));
/* 16: num tl data */
CHECK(ret = krb5_ret_uint16(sp, &u16));
num_tl = u16;
/* 16: num key data */
CHECK(ret = krb5_ret_uint16(sp, &u16));
num_keys = u16;
/* 16: principal length */
CHECK(ret = krb5_ret_uint16(sp, &u16));
/* length: principal */
{
/*
* Note that the principal name includes the NUL in the entry,
* but we don't want to take chances, so we add an extra NUL.
*/
p = malloc(u16 + 1);
if (p == NULL) {
ret = ENOMEM;
goto out;
}
krb5_storage_read(sp, p, u16);
p[u16] = '\0';
CHECK(ret = krb5_parse_name(context, p, &entry->principal));
free(p);
}
/* for num tl data times
16: tl data type
16: tl data length
length: length */
for (i = 0; i < num_tl; i++) {
/* 16: TL data type */
CHECK(ret = krb5_ret_uint16(sp, &u16));
/* 16: TL data length */
CHECK(ret = krb5_ret_uint16(sp, &u16));
krb5_storage_seek(sp, u16, SEEK_CUR);
}
/*
* for num key data times
* 16: "version"
* 16: kvno
* for version times:
* 16: type
* 16: length
* length: keydata
*
* "version" here is really 1 or 2, the first meaning there's only
* keys for this kvno, the second meaning there's keys and salt[s?].
* That's right... hold that gag reflex, you can do it.
*/
for (i = 0; i < num_keys; i++) {
int keep = 0;
uint16_t version;
void *ptr;
CHECK(ret = krb5_ret_uint16(sp, &u16));
version = u16;
CHECK(ret = krb5_ret_uint16(sp, &u16));
/*
* First time through, and until we find one matching key,
* entry->kvno == 0.
*/
if ((entry->kvno < u16) && (kvno == 0 || kvno == u16)) {
keep = 1;
entry->kvno = u16;
/*
* Found a higher kvno than earlier, so free the old highest
* kvno keys.
*
* XXX Of course, we actually want to extract the old kvnos
* as well, for some of the kadm5 APIs. We shouldn't free
* these keys, but keep them elsewhere.
*/
for (j = 0; j < entry->keys.len; j++)
free_Key(&entry->keys.val[j]);
free(entry->keys.val);
entry->keys.len = 0;
entry->keys.val = NULL;
} else if (entry->kvno == u16)
/* Accumulate keys */
keep = 1;
if (keep) {
Key *k;
ptr = realloc(entry->keys.val, sizeof(entry->keys.val[0]) * (entry->keys.len + 1));
if (ptr == NULL) {
ret = ENOMEM;
goto out;
}
entry->keys.val = ptr;
/* k points to current Key */
k = &entry->keys.val[entry->keys.len];
memset(k, 0, sizeof(*k));
entry->keys.len += 1;
k->mkvno = malloc(sizeof(*k->mkvno));
if (k->mkvno == NULL) {
ret = ENOMEM;
goto out;
}
*k->mkvno = 1;
for (j = 0; j < version; j++) {
uint16_t type;
CHECK(ret = krb5_ret_uint16(sp, &type));
CHECK(ret = krb5_ret_uint16(sp, &u16));
if (j == 0) {
/* This "version" means we have a key */
k->key.keytype = type;
if (u16 < 2) {
ret = EINVAL;
goto out;
}
/*
* MIT stores keys encrypted keys as {16-bit length
* of plaintext key, {encrypted key}}. The reason
* for this is that the Kerberos cryptosystem is not
* length-preserving. Heimdal's approach is to
* truncate the plaintext to the expected length of
* the key given its enctype, so we ignore this
* 16-bit length-of-plaintext-key field.
*/
krb5_storage_seek(sp, 2, SEEK_CUR); /* skip real length */
k->key.keyvalue.length = u16 - 2; /* adjust cipher len */
k->key.keyvalue.data = malloc(k->key.keyvalue.length);
krb5_storage_read(sp, k->key.keyvalue.data,
k->key.keyvalue.length);
} else if (j == 1) {
/* This "version" means we have a salt */
k->salt = calloc(1, sizeof(*k->salt));
if (k->salt == NULL) {
ret = ENOMEM;
goto out;
}
k->salt->type = type;
if (u16 != 0) {
k->salt->salt.data = malloc(u16);
if (k->salt->salt.data == NULL) {
ret = ENOMEM;
goto out;
}
k->salt->salt.length = u16;
krb5_storage_read(sp, k->salt->salt.data, k->salt->salt.length);
}
fix_salt(context, entry, entry->keys.len - 1);
} else {
/*
* Whatever this "version" might be, we skip it
*
* XXX A krb5.conf parameter requesting that we log
* about strangeness like this, or return an error
* from here, might be nice.
*/
krb5_storage_seek(sp, u16, SEEK_CUR);
}
}
} else {
/*
* XXX For now we skip older kvnos, but we should extract
* them...
*/
for (j = 0; j < version; j++) {
/* enctype */
CHECK(ret = krb5_ret_uint16(sp, &u16));
/* encrypted key (or plaintext salt) */
CHECK(ret = krb5_ret_uint16(sp, &u16));
krb5_storage_seek(sp, u16, SEEK_CUR);
}
}
}
if (entry->kvno == 0 && kvno != 0) {
ret = HDB_ERR_NOT_FOUND_HERE;
goto out;
}
return 0;
out:
if (ret == HEIM_ERR_EOF)
/* Better error code than "end of file" */
ret = HEIM_ERR_BAD_HDBENT_ENCODING;
return ret;
}
