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-rw-r--r--source4/ldap_server/ldap_server.c200
-rw-r--r--source4/ldap_server/ldap_server.h5
2 files changed, 192 insertions, 13 deletions
diff --git a/source4/ldap_server/ldap_server.c b/source4/ldap_server/ldap_server.c
index 494981f99d..34a4fc59e1 100644
--- a/source4/ldap_server/ldap_server.c
+++ b/source4/ldap_server/ldap_server.c
@@ -129,6 +129,13 @@ static void consumed_from_buf(struct rw_buffer *buf,
buf->length -= length;
}
+static void peek_into_read_buf(struct rw_buffer *buf, uint8_t **out,
+ size_t *out_length)
+{
+ *out = buf->data;
+ *out_length = buf->length;
+}
+
static BOOL append_to_buf(struct rw_buffer *buf, uint8_t *data, size_t length)
{
buf->data = realloc(buf->data, buf->length+length);
@@ -161,6 +168,104 @@ static BOOL read_into_buf(struct socket_context *sock, struct rw_buffer *buf)
return ret;
}
+static BOOL ldapsrv_read_buf(struct ldapsrv_connection *conn)
+{
+ NTSTATUS status;
+ DATA_BLOB tmp_blob;
+ DATA_BLOB creds;
+ BOOL ret;
+ uint8_t *buf;
+ int buf_length, sasl_length;
+ struct socket_context *sock = conn->connection->socket;
+ TALLOC_CTX *mem_ctx;
+
+ if (!conn->gensec ||
+ !(gensec_have_feature(conn->gensec, GENSEC_WANT_SIGN) &&
+ gensec_have_feature(conn->gensec, GENSEC_WANT_SEAL))) {
+ return read_into_buf(sock, &conn->in_buffer);
+ }
+
+ mem_ctx = talloc(conn, 0);
+ if (!mem_ctx) {
+ DEBUG(0,("no memory\n"));
+ return False;
+ }
+
+ status = socket_recv(sock, mem_ctx, &tmp_blob, 1024, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10,("socket_recv: %s\n",nt_errstr(status)));
+ talloc_free(mem_ctx);
+ return False;
+ }
+
+ ret = append_to_buf(&conn->sasl_in_buffer, tmp_blob.data, tmp_blob.length);
+ if (!ret) {
+ talloc_free(mem_ctx);
+ return False;
+ }
+
+ peek_into_read_buf(&conn->sasl_in_buffer, &buf, &buf_length);
+
+ if (buf_length < 4) {
+ /* not enough yet */
+ talloc_free(mem_ctx);
+ return True;
+ }
+
+ sasl_length = RIVAL(buf, 0);
+
+ if (buf_length < (4 + sasl_length)) {
+ /* not enough yet */
+ talloc_free(mem_ctx);
+ return True;
+ }
+
+ creds.data = buf + 4;
+ creds.length = gensec_sig_size(conn->gensec);
+
+ if (creds.length > sasl_length) {
+ /* invalid packet? */
+ talloc_free(mem_ctx);
+ return False;
+ }
+
+ tmp_blob.data = buf + (4 + creds.length);
+ tmp_blob.length = (4 + sasl_length) - (4 + creds.length);
+
+ if (gensec_have_feature(conn->gensec, GENSEC_WANT_SEAL)) {
+ status = gensec_unseal_packet(conn->gensec, mem_ctx,
+ tmp_blob.data, tmp_blob.length,
+ tmp_blob.data, tmp_blob.length,
+ &creds);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("gensec_unseal_packet: %s\n",nt_errstr(status)));
+ talloc_free(mem_ctx);
+ return False;
+ }
+ } else {
+ status = gensec_check_packet(conn->gensec, mem_ctx,
+ tmp_blob.data, tmp_blob.length,
+ tmp_blob.data, tmp_blob.length,
+ &creds);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("gensec_check_packet: %s\n",nt_errstr(status)));
+ talloc_free(mem_ctx);
+ return False;
+ }
+ }
+
+ ret = append_to_buf(&conn->in_buffer, tmp_blob.data, tmp_blob.length);
+ if (!ret) {
+ talloc_free(mem_ctx);
+ return False;
+ }
+
+ consumed_from_buf(&conn->sasl_in_buffer, 4 + sasl_length);
+
+ talloc_free(mem_ctx);
+ return ret;
+}
+
static BOOL write_from_buf(struct socket_context *sock, struct rw_buffer *buf)
{
NTSTATUS status;
@@ -181,11 +286,84 @@ static BOOL write_from_buf(struct socket_context *sock, struct rw_buffer *buf)
return True;
}
-static void peek_into_read_buf(struct rw_buffer *buf, uint8_t **out,
- size_t *out_length)
+static BOOL ldapsrv_write_buf(struct ldapsrv_connection *conn)
{
- *out = buf->data;
- *out_length = buf->length;
+ NTSTATUS status;
+ DATA_BLOB tmp_blob;
+ DATA_BLOB creds;
+ DATA_BLOB sasl;
+ size_t sendlen;
+ BOOL ret;
+ struct socket_context *sock = conn->connection->socket;
+ TALLOC_CTX *mem_ctx;
+
+ if (!conn->gensec ||
+ !(gensec_have_feature(conn->gensec, GENSEC_WANT_SIGN) &&
+ gensec_have_feature(conn->gensec, GENSEC_WANT_SEAL))) {
+ return write_from_buf(sock, &conn->out_buffer);
+ }
+
+ mem_ctx = talloc(conn, 0);
+ if (!mem_ctx) {
+ DEBUG(0,("no memory\n"));
+ return False;
+ }
+
+ tmp_blob.data = conn->out_buffer.data;
+ tmp_blob.length = conn->out_buffer.length;
+
+ if (gensec_have_feature(conn->gensec, GENSEC_WANT_SEAL)) {
+ status = gensec_seal_packet(conn->gensec, mem_ctx,
+ tmp_blob.data, tmp_blob.length,
+ tmp_blob.data, tmp_blob.length,
+ &creds);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("gensec_seal_packet: %s\n",nt_errstr(status)));
+ talloc_free(mem_ctx);
+ return False;
+ }
+ } else {
+ status = gensec_sign_packet(conn->gensec, mem_ctx,
+ tmp_blob.data, tmp_blob.length,
+ tmp_blob.data, tmp_blob.length,
+ &creds);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("gensec_sign_packet: %s\n",nt_errstr(status)));
+ talloc_free(mem_ctx);
+ return False;
+ }
+ }
+
+ sasl = data_blob_talloc(mem_ctx, NULL, 4 + creds.length + tmp_blob.length);
+ if (!sasl.data) {
+ DEBUG(0,("no memory\n"));
+ talloc_free(mem_ctx);
+ return False;
+ }
+
+ RSIVAL(sasl.data, 0, creds.length + tmp_blob.length);
+ memcpy(sasl.data + 4, creds.data, creds.length);
+ memcpy(sasl.data + 4 + creds.length, tmp_blob.data, tmp_blob.length);
+
+ ret = append_to_buf(&conn->sasl_out_buffer, sasl.data, sasl.length);
+ if (!ret) {
+ talloc_free(mem_ctx);
+ return False;
+ }
+ consumed_from_buf(&conn->out_buffer, tmp_blob.length);
+
+ status = socket_send(sock, mem_ctx, &tmp_blob, &sendlen, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10,("socket_send() %s\n",nt_errstr(status)));
+ talloc_free(mem_ctx);
+ return False;
+ }
+
+ consumed_from_buf(&conn->sasl_out_buffer, sendlen);
+
+ talloc_free(mem_ctx);
+
+ return True;
}
static BOOL ldap_append_to_buf(struct ldap_message *msg, struct rw_buffer *buf)
@@ -499,16 +677,14 @@ static void ldapsrv_recv(struct server_connection *conn, time_t t,
DEBUG(10,("ldapsrv_recv\n"));
- if (!read_into_buf(conn->socket, &ldap_conn->in_buffer)) {
- ldapsrv_terminate_connection(ldap_conn, "read_into_buf() failed");
+ if (!ldapsrv_read_buf(ldap_conn)) {
+ ldapsrv_terminate_connection(ldap_conn, "ldapsrv_read_buf() failed");
return;
}
peek_into_read_buf(&ldap_conn->in_buffer, &buf, &buf_length);
while (buf_length > 0) {
-
- peek_into_read_buf(&ldap_conn->in_buffer, &buf, &buf_length);
/* LDAP Messages are always SEQUENCES */
if (!asn1_object_length(buf, buf_length, ASN1_SEQUENCE(0),
@@ -576,7 +752,7 @@ static void ldapsrv_recv(struct server_connection *conn, time_t t,
return;
}
- if (ldap_conn->out_buffer.length > 0) {
+ if ((ldap_conn->out_buffer.length > 0)||(ldap_conn->sasl_out_buffer.length > 0)) {
conn->event.fde->flags |= EVENT_FD_WRITE;
}
@@ -593,12 +769,12 @@ static void ldapsrv_send(struct server_connection *conn, time_t t,
DEBUG(10,("ldapsrv_send\n"));
- if (!write_from_buf(conn->socket, &ldap_conn->out_buffer)) {
- ldapsrv_terminate_connection(ldap_conn, "write_from_buf() failed");
+ if (!ldapsrv_write_buf(ldap_conn)) {
+ ldapsrv_terminate_connection(ldap_conn, "ldapsrv_write_buf() failed");
return;
}
- if (ldap_conn->out_buffer.length == 0) {
+ if (ldap_conn->out_buffer.length == 0 && ldap_conn->sasl_out_buffer.length == 0) {
conn->event.fde->flags &= ~EVENT_FD_WRITE;
}
diff --git a/source4/ldap_server/ldap_server.h b/source4/ldap_server/ldap_server.h
index 6ae9cb42d3..57d1bba7e5 100644
--- a/source4/ldap_server/ldap_server.h
+++ b/source4/ldap_server/ldap_server.h
@@ -61,9 +61,12 @@ struct ldapsrv_service;
struct ldapsrv_connection {
struct server_connection *connection;
- struct gensec_security *gensec_ctx;
+ struct gensec_security *gensec;
const struct auth_session_info *session_info;
+ struct rw_buffer sasl_in_buffer;
+ struct rw_buffer sasl_out_buffer;
+
struct rw_buffer in_buffer;
struct rw_buffer out_buffer;
generated by cgit (git 2.34.1) at 2024-12-20 05:28:53 +0000