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-rw-r--r--source4/kdc/hdb-ldb.c205
1 files changed, 193 insertions, 12 deletions
diff --git a/source4/kdc/hdb-ldb.c b/source4/kdc/hdb-ldb.c
index cfde301cd3..95c60e2c78 100644
--- a/source4/kdc/hdb-ldb.c
+++ b/source4/kdc/hdb-ldb.c
@@ -49,11 +49,18 @@
#include "param/param.h"
#include "events/events.h"
#include "kdc/kdc.h"
+#include "lib/crypto/md4.h"
enum hdb_ldb_ent_type
{ HDB_LDB_ENT_TYPE_CLIENT, HDB_LDB_ENT_TYPE_SERVER,
HDB_LDB_ENT_TYPE_KRBTGT, HDB_LDB_ENT_TYPE_TRUST, HDB_LDB_ENT_TYPE_ANY };
+enum trust_direction {
+ INBOUND,
+ OUTBOUND,
+ UNKNOWN
+};
+
static const char *realm_ref_attrs[] = {
"nCName",
"dnsRoot",
@@ -65,6 +72,10 @@ static const char *trust_attrs[] = {
"trustAuthIncoming",
"trustAuthOutgoing",
"whenCreated",
+ "msDS-SupportedEncryptionTypes",
+ "trustAttributes",
+ "trustDirection",
+ "trustType",
NULL
};
@@ -683,6 +694,182 @@ out:
return ret;
}
+/*
+ * Construct an hdb_entry from a directory entry.
+ */
+static krb5_error_code LDB_trust_message2entry(krb5_context context, HDB *db,
+ struct loadparm_context *lp_ctx,
+ TALLOC_CTX *mem_ctx, krb5_const_principal principal,
+ enum trust_direction direction,
+ struct ldb_message *msg,
+ hdb_entry_ex *entry_ex)
+{
+
+ const char *dnsdomain;
+ char *realm;
+ char *strdup_realm;
+ DATA_BLOB password_utf16;
+ struct samr_Password password_hash;
+ const struct ldb_val *password_val;
+ struct trustAuthInOutBlob password_blob;
+ struct hdb_ldb_private *private;
+
+ enum ndr_err_code ndr_err;
+ int i, ret, trust_direction_flags;
+
+ private = talloc(mem_ctx, struct hdb_ldb_private);
+ if (!private) {
+ ret = ENOMEM;
+ goto out;
+ }
+
+ private->entry_ex = entry_ex;
+ private->iconv_convenience = lp_iconv_convenience(lp_ctx);
+ private->netbios_name = lp_netbios_name(lp_ctx);
+
+ talloc_set_destructor(private, hdb_ldb_destrutor);
+
+ entry_ex->ctx = private;
+ entry_ex->free_entry = hdb_ldb_free_entry;
+
+ /* use 'whenCreated' */
+ entry_ex->entry.created_by.time = ldb_msg_find_krb5time_ldap_time(msg, "whenCreated", 0);
+ /* use '???' */
+ entry_ex->entry.created_by.principal = NULL;
+
+ entry_ex->entry.valid_start = NULL;
+
+ trust_direction_flags = ldb_msg_find_attr_as_int(msg, "trustDirection", 0);
+
+ if (direction == INBOUND) {
+ realm = strupper_talloc(mem_ctx, lp_realm(lp_ctx));
+ password_val = ldb_msg_find_ldb_val(msg, "trustAuthIncoming");
+
+ } else { /* OUTBOUND */
+ dnsdomain = ldb_msg_find_attr_as_string(msg, "trustPartner", NULL);
+ realm = strupper_talloc(mem_ctx, dnsdomain);
+ password_val = ldb_msg_find_ldb_val(msg, "trustAuthOutgoing");
+ }
+
+ ndr_err = ndr_pull_struct_blob_all(password_val, mem_ctx, private->iconv_convenience, &password_blob,
+ (ndr_pull_flags_fn_t)ndr_pull_trustAuthInOutBlob);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ ret = EINVAL;
+ goto out;
+ }
+
+ for (i=0; i < password_blob.count; i++) {
+ if (password_blob.current->array[i].AuthType == TRUST_AUTH_TYPE_CLEAR) {
+ password_utf16 = data_blob_const(password_blob.current->array[i].AuthInfo.clear.password,
+ password_blob.current->array[i].AuthInfo.clear.size);
+ /* In the future, generate all sorts of
+ * hashes, but for now we can't safely convert
+ * the random strings windows uses into
+ * utf8 */
+
+ /* but as it is utf16 already, we can get the NT password/arcfour-hmac-md5 key */
+ mdfour(password_hash.hash, password_utf16.data, password_utf16.length);
+ break;
+ } else if (password_blob.current->array[i].AuthType == TRUST_AUTH_TYPE_NT4OWF) {
+ password_hash = password_blob.current->array[i].AuthInfo.nt4owf.password;
+ break;
+ }
+ }
+ entry_ex->entry.keys.len = 0;
+ entry_ex->entry.keys.val = NULL;
+
+ if (i < password_blob.count) {
+ Key key;
+ /* Must have found a cleartext or MD4 password */
+ entry_ex->entry.keys.val = calloc(1, sizeof(Key));
+
+ key.mkvno = 0;
+ key.salt = NULL; /* No salt for this enc type */
+
+ if (entry_ex->entry.keys.val == NULL) {
+ ret = ENOMEM;
+ goto out;
+ }
+
+ ret = krb5_keyblock_init(context,
+ ENCTYPE_ARCFOUR_HMAC_MD5,
+ password_hash.hash, sizeof(password_hash.hash),
+ &key.key);
+
+ entry_ex->entry.keys.val[entry_ex->entry.keys.len] = key;
+ entry_ex->entry.keys.len++;
+ }
+
+ ret = copy_Principal(principal, entry_ex->entry.principal);
+ if (ret) {
+ krb5_clear_error_string(context);
+ goto out;
+ }
+
+ /* While we have copied the client principal, tests
+ * show that Win2k3 returns the 'corrected' realm, not
+ * the client-specified realm. This code attempts to
+ * replace the client principal's realm with the one
+ * we determine from our records */
+
+ /* this has to be with malloc() */
+ strdup_realm = strdup(realm);
+ if (!strdup_realm) {
+ ret = ENOMEM;
+ krb5_clear_error_string(context);
+ goto out;
+ }
+ free(*krb5_princ_realm(context, entry_ex->entry.principal));
+ krb5_princ_set_realm(context, entry_ex->entry.principal, &strdup_realm);
+
+ entry_ex->entry.flags = int2HDBFlags(0);
+ entry_ex->entry.flags.immutable = 1;
+ entry_ex->entry.flags.invalid = 0;
+ entry_ex->entry.flags.server = 1;
+ entry_ex->entry.flags.require_preauth = 1;
+
+ entry_ex->entry.pw_end = NULL;
+
+ entry_ex->entry.max_life = NULL;
+
+ entry_ex->entry.max_renew = NULL;
+
+ entry_ex->entry.generation = NULL;
+
+ entry_ex->entry.etypes = malloc(sizeof(*(entry_ex->entry.etypes)));
+ if (entry_ex->entry.etypes == NULL) {
+ krb5_clear_error_string(context);
+ ret = ENOMEM;
+ goto out;
+ }
+ entry_ex->entry.etypes->len = entry_ex->entry.keys.len;
+ entry_ex->entry.etypes->val = calloc(entry_ex->entry.etypes->len, sizeof(int));
+ if (entry_ex->entry.etypes->val == NULL) {
+ krb5_clear_error_string(context);
+ ret = ENOMEM;
+ goto out;
+ }
+ for (i=0; i < entry_ex->entry.etypes->len; i++) {
+ entry_ex->entry.etypes->val[i] = entry_ex->entry.keys.val[i].key.keytype;
+ }
+
+
+ private->msg = talloc_steal(private, msg);
+ private->realm_ref_msg = NULL;
+ private->samdb = (struct ldb_context *)db->hdb_db;
+
+out:
+ if (ret != 0) {
+ /* This doesn't free ent itself, that is for the eventual caller to do */
+ hdb_free_entry(context, entry_ex);
+ } else {
+ talloc_steal(db, entry_ex->ctx);
+ }
+
+ return ret;
+
+}
+
static krb5_error_code LDB_lookup_principal(krb5_context context, struct ldb_context *ldb_ctx,
TALLOC_CTX *mem_ctx,
krb5_const_principal principal,
@@ -717,8 +904,7 @@ static krb5_error_code LDB_lookup_principal(krb5_context context, struct ldb_con
switch (ent_type) {
case HDB_LDB_ENT_TYPE_CLIENT:
- /* Can't happen */
- return EINVAL;
+ case HDB_LDB_ENT_TYPE_TRUST:
case HDB_LDB_ENT_TYPE_ANY:
/* Can't happen */
return EINVAL;
@@ -756,7 +942,6 @@ static krb5_error_code LDB_lookup_principal(krb5_context context, struct ldb_con
static krb5_error_code LDB_lookup_trust(krb5_context context, struct ldb_context *ldb_ctx,
TALLOC_CTX *mem_ctx,
const char *realm,
- enum hdb_ldb_ent_type ent_type,
struct ldb_dn *realm_dn,
struct ldb_message ***pmsg)
{
@@ -961,11 +1146,7 @@ static krb5_error_code LDB_fetch_krbtgt(krb5_context context, HDB *db,
return ret;
} else {
- enum {
- INBOUND,
- OUTBOUND,
- UNKNOWN
- } direction = UNKNOWN;
+ enum trust_direction direction = UNKNOWN;
struct loadparm_context *lp_ctx = talloc_get_type(ldb_get_opaque(db->hdb_db, "loadparm"), struct loadparm_context);
/* Either an inbound or outbound trust */
@@ -986,7 +1167,7 @@ static krb5_error_code LDB_fetch_krbtgt(krb5_context context, HDB *db,
ret = LDB_lookup_trust(context, (struct ldb_context *)db->hdb_db,
mem_ctx,
- realm, HDB_LDB_ENT_TYPE_TRUST, realm_dn, &msg);
+ realm, realm_dn, &msg);
if (ret != 0) {
krb5_warnx(context, "LDB_fetch: could not find principal in DB");
@@ -994,9 +1175,9 @@ static krb5_error_code LDB_fetch_krbtgt(krb5_context context, HDB *db,
return ret;
}
- ret = LDB_message2entry(context, db, mem_ctx,
- principal, HDB_LDB_ENT_TYPE_KRBTGT,
- msg[0], realm_ref_msg_1[0], entry_ex);
+ ret = LDB_trust_message2entry(context, db, lp_ctx, mem_ctx,
+ principal, direction,
+ msg[0], entry_ex);
if (ret != 0) {
krb5_warnx(context, "LDB_fetch: message2entry failed");
}
generated by cgit (git 2.34.1) at 2024-11-30 23:33:20 +0000