#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "../libcli/smb/smb_common.h"
+#include "../lib/tsocket/tsocket.h"
+#include "../librpc/ndr/libndr.h"
+
+extern fstring remote_proto;
/*
* this is the entry point if SMB2 is selected via
- * the SMB negprot
+ * the SMB negprot and the given dialect.
*/
-void reply_smb2002(struct smb_request *req, uint16_t choice)
+static void reply_smb20xx(struct smb_request *req, uint16_t dialect)
{
- uint8_t *smb2_inbuf;
+ uint8_t *smb2_inpdu;
uint8_t *smb2_hdr;
uint8_t *smb2_body;
uint8_t *smb2_dyn;
- size_t len = 4 + SMB2_HDR_BODY + 0x24 + 2;
+ size_t len = SMB2_HDR_BODY + 0x24 + 2;
- smb2_inbuf = talloc_zero_array(talloc_tos(), uint8_t, len);
- if (smb2_inbuf == NULL) {
+ smb2_inpdu = talloc_zero_array(talloc_tos(), uint8_t, len);
+ if (smb2_inpdu == NULL) {
DEBUG(0, ("Could not push spnego blob\n"));
reply_nterror(req, NT_STATUS_NO_MEMORY);
return;
}
- smb2_hdr = smb2_inbuf + 4;
+ smb2_hdr = smb2_inpdu;
smb2_body = smb2_hdr + SMB2_HDR_BODY;
smb2_dyn = smb2_body + 0x24;
SSVAL(smb2_body, 0x00, 0x0024); /* struct size */
SSVAL(smb2_body, 0x02, 0x0001); /* dialect count */
- SSVAL(smb2_dyn, 0x00, 0x0202); /* dialect 2.002 */
+ SSVAL(smb2_dyn, 0x00, dialect);
req->outbuf = NULL;
- smbd_smb2_first_negprot(req->sconn, smb2_inbuf, len);
+ smbd_smb2_first_negprot(req->xconn, smb2_inpdu, len);
return;
}
+/*
+ * this is the entry point if SMB2 is selected via
+ * the SMB negprot and the "SMB 2.002" dialect.
+ */
+void reply_smb2002(struct smb_request *req, uint16_t choice)
+{
+ reply_smb20xx(req, SMB2_DIALECT_REVISION_202);
+}
+
+/*
+ * this is the entry point if SMB2 is selected via
+ * the SMB negprot and the "SMB 2.???" dialect.
+ */
+void reply_smb20ff(struct smb_request *req, uint16_t choice)
+{
+ struct smbXsrv_connection *xconn = req->xconn;
+ xconn->smb2.allow_2ff = true;
+ reply_smb20xx(req, SMB2_DIALECT_REVISION_2FF);
+}
+
+enum protocol_types smbd_smb2_protocol_dialect_match(const uint8_t *indyn,
+ const int dialect_count,
+ uint16_t *dialect)
+{
+ struct {
+ enum protocol_types proto;
+ uint16_t dialect;
+ } pd[] = {
+ { PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300 },
+ { PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224 },
+ { PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222 },
+ { PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210 },
+ { PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202 },
+ };
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(pd); i ++) {
+ size_t c = 0;
+
+ if (lp_server_max_protocol() < pd[i].proto) {
+ continue;
+ }
+ if (lp_server_min_protocol() > pd[i].proto) {
+ continue;
+ }
+
+ for (c = 0; c < dialect_count; c++) {
+ *dialect = SVAL(indyn, c*2);
+ if (*dialect == pd[i].dialect) {
+ return pd[i].proto;
+ }
+ }
+ }
+
+ return PROTOCOL_NONE;
+}
+
NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req)
{
+ struct smbXsrv_connection *xconn = req->xconn;
+ NTSTATUS status;
const uint8_t *inbody;
const uint8_t *indyn = NULL;
- int i = req->current_idx;
DATA_BLOB outbody;
DATA_BLOB outdyn;
DATA_BLOB negprot_spnego_blob;
uint16_t security_offset;
DATA_BLOB security_buffer;
- size_t expected_body_size = 0x24;
- size_t body_size;
size_t expected_dyn_size = 0;
size_t c;
uint16_t security_mode;
uint16_t dialect_count;
+ uint16_t in_security_mode;
+ uint32_t in_capabilities;
+ DATA_BLOB in_guid_blob;
+ struct GUID in_guid;
uint16_t dialect = 0;
uint32_t capabilities;
-
-/* TODO: drop the connection with INVALID_PARAMETER */
-
- if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
- return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ DATA_BLOB out_guid_blob;
+ struct GUID out_guid;
+ enum protocol_types protocol = PROTOCOL_NONE;
+ uint32_t max_limit;
+ uint32_t max_trans = lp_smb2_max_trans();
+ uint32_t max_read = lp_smb2_max_read();
+ uint32_t max_write = lp_smb2_max_write();
+ NTTIME now = timeval_to_nttime(&req->request_time);
+
+ status = smbd_smb2_request_verify_sizes(req, 0x24);
+ if (!NT_STATUS_IS_OK(status)) {
+ return smbd_smb2_request_error(req, status);
}
+ inbody = SMBD_SMB2_IN_BODY_PTR(req);
- inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
+ dialect_count = SVAL(inbody, 0x02);
- body_size = SVAL(inbody, 0x00);
- if (body_size != expected_body_size) {
- return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
- }
+ in_security_mode = SVAL(inbody, 0x04);
+ in_capabilities = IVAL(inbody, 0x08);
+ in_guid_blob = data_blob_const(inbody + 0x0C, 16);
- dialect_count = SVAL(inbody, 0x02);
if (dialect_count == 0) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
+ status = GUID_from_ndr_blob(&in_guid_blob, &in_guid);
+ if (!NT_STATUS_IS_OK(status)) {
+ return smbd_smb2_request_error(req, status);
+ }
+
expected_dyn_size = dialect_count * 2;
- if (req->in.vector[i+2].iov_len < expected_dyn_size) {
+ if (SMBD_SMB2_IN_DYN_LEN(req) < expected_dyn_size) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
- indyn = (const uint8_t *)req->in.vector[i+2].iov_base;
+ indyn = SMBD_SMB2_IN_DYN_PTR(req);
- for (c=0; c < dialect_count; c++) {
- dialect = SVAL(indyn, c*2);
- if (dialect == SMB2_DIALECT_REVISION_202) {
+ protocol = smbd_smb2_protocol_dialect_match(indyn,
+ dialect_count,
+ &dialect);
+
+ for (c=0; protocol == PROTOCOL_NONE && c < dialect_count; c++) {
+ if (lp_server_max_protocol() < PROTOCOL_SMB2_10) {
break;
}
- }
- if (dialect != SMB2_DIALECT_REVISION_202) {
- return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ dialect = SVAL(indyn, c*2);
+ if (dialect == SMB2_DIALECT_REVISION_2FF) {
+ if (xconn->smb2.allow_2ff) {
+ xconn->smb2.allow_2ff = false;
+ protocol = PROTOCOL_SMB2_10;
+ break;
+ }
+ }
}
- set_Protocol(PROTOCOL_SMB2);
+ if (protocol == PROTOCOL_NONE) {
+ return smbd_smb2_request_error(req, NT_STATUS_NOT_SUPPORTED);
+ }
if (get_remote_arch() != RA_SAMBA) {
set_remote_arch(RA_VISTA);
}
+ fstr_sprintf(remote_proto, "SMB%X_%02X",
+ (dialect >> 8) & 0xFF, dialect & 0xFF);
+
+ reload_services(req->sconn, conn_snum_used, true);
+ DEBUG(3,("Selected protocol %s\n", remote_proto));
+
/* negprot_spnego() returns a the server guid in the first 16 bytes */
- negprot_spnego_blob = negprot_spnego(req, req->sconn);
+ negprot_spnego_blob = negprot_spnego(req, xconn);
if (negprot_spnego_blob.data == NULL) {
return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
}
}
security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
- if (lp_server_signing() == Required) {
+ if (lp_server_signing() == SMB_SIGNING_REQUIRED) {
security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
}
capabilities |= SMB2_CAP_DFS;
}
+ if (protocol >= PROTOCOL_SMB2_10 &&
+ lp_smb2_leases() &&
+ lp_oplocks(GLOBAL_SECTION_SNUM) &&
+ !lp_kernel_oplocks(GLOBAL_SECTION_SNUM))
+ {
+ capabilities |= SMB2_CAP_LEASING;
+ }
+
+ if ((protocol >= PROTOCOL_SMB2_24) &&
+ (lp_smb_encrypt(-1) != SMB_SIGNING_OFF) &&
+ (in_capabilities & SMB2_CAP_ENCRYPTION)) {
+ capabilities |= SMB2_CAP_ENCRYPTION;
+ }
+
+ /*
+ * 0x10000 (65536) is the maximum allowed message size
+ * for SMB 2.0
+ */
+ max_limit = 0x10000;
+
+ if (protocol >= PROTOCOL_SMB2_10) {
+ int p = 0;
+
+ if (tsocket_address_is_inet(req->sconn->local_address, "ip")) {
+ p = tsocket_address_inet_port(req->sconn->local_address);
+ }
+
+ /* largeMTU is not supported over NBT (tcp port 139) */
+ if (p != NBT_SMB_PORT) {
+ capabilities |= SMB2_CAP_LARGE_MTU;
+ xconn->smb2.credits.multicredit = true;
+
+ /*
+ * We allow up to allmost 16MB.
+ *
+ * The maximum PDU size is 0xFFFFFF (16776960)
+ * and we need some space for the header.
+ */
+ max_limit = 0xFFFF00;
+ }
+ }
+
+ /*
+ * the defaults are 8MB, but we'll limit this to max_limit based on
+ * the dialect (64kb for SMB 2.0, 8MB for SMB >= 2.1 with LargeMTU)
+ *
+ * user configured values exceeding the limits will be overwritten,
+ * only smaller values will be accepted
+ */
+
+ max_trans = MIN(max_limit, lp_smb2_max_trans());
+ max_read = MIN(max_limit, lp_smb2_max_read());
+ max_write = MIN(max_limit, lp_smb2_max_write());
+
+ if (capabilities & SMB2_CAP_ENCRYPTION) {
+ xconn->smb2.server.cipher = SMB2_ENCRYPTION_AES128_CCM;
+ }
+
security_offset = SMB2_HDR_BODY + 0x40;
#if 1
security_buffer = data_blob_const(NULL, 0);
#endif
- outbody = data_blob_talloc(req->out.vector, NULL, 0x40);
+ out_guid_blob = data_blob_const(negprot_spnego_blob.data, 16);
+ status = GUID_from_ndr_blob(&out_guid_blob, &out_guid);
+ if (!NT_STATUS_IS_OK(status)) {
+ return smbd_smb2_request_error(req, status);
+ }
+
+ outbody = smbd_smb2_generate_outbody(req, 0x40);
if (outbody.data == NULL) {
return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
}
SSVAL(outbody.data, 0x04, dialect); /* dialect revision */
SSVAL(outbody.data, 0x06, 0); /* reserved */
memcpy(outbody.data + 0x08,
- negprot_spnego_blob.data, 16); /* server guid */
+ out_guid_blob.data, 16); /* server guid */
SIVAL(outbody.data, 0x18,
capabilities); /* capabilities */
- SIVAL(outbody.data, 0x1C, lp_smb2_max_trans()); /* max transact size */
- SIVAL(outbody.data, 0x20, lp_smb2_max_read()); /* max read size */
- SIVAL(outbody.data, 0x24, lp_smb2_max_write()); /* max write size */
- SBVAL(outbody.data, 0x28, 0); /* system time */
+ SIVAL(outbody.data, 0x1C, max_trans); /* max transact size */
+ SIVAL(outbody.data, 0x20, max_read); /* max read size */
+ SIVAL(outbody.data, 0x24, max_write); /* max write size */
+ SBVAL(outbody.data, 0x28, now); /* system time */
SBVAL(outbody.data, 0x30, 0); /* server start time */
SSVAL(outbody.data, 0x38,
security_offset); /* security buffer offset */
outdyn = security_buffer;
+ req->sconn->using_smb2 = true;
+
+ if (dialect != SMB2_DIALECT_REVISION_2FF) {
+ status = smbXsrv_connection_init_tables(xconn, protocol);
+ if (!NT_STATUS_IS_OK(status)) {
+ return smbd_smb2_request_error(req, status);
+ }
+
+ xconn->smb2.client.capabilities = in_capabilities;
+ xconn->smb2.client.security_mode = in_security_mode;
+ xconn->smb2.client.guid = in_guid;
+ xconn->smb2.client.num_dialects = dialect_count;
+ xconn->smb2.client.dialects = talloc_array(xconn,
+ uint16_t,
+ dialect_count);
+ if (xconn->smb2.client.dialects == NULL) {
+ return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+ }
+ for (c=0; c < dialect_count; c++) {
+ xconn->smb2.client.dialects[c] = SVAL(indyn, c*2);
+ }
+
+ xconn->smb2.server.capabilities = capabilities;
+ xconn->smb2.server.security_mode = security_mode;
+ xconn->smb2.server.guid = out_guid;
+ xconn->smb2.server.dialect = dialect;
+ xconn->smb2.server.max_trans = max_trans;
+ xconn->smb2.server.max_read = max_read;
+ xconn->smb2.server.max_write = max_write;
+ }
+
return smbd_smb2_request_done(req, outbody, &outdyn);
}
git.samba.org / kamenim / samba-autobuild / .git / blobdiff