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The common code does not have a mem_ctx on ntlmssp_check_packet() and ntlmssp_unseal_packet(). We do however need some internal working of the code exposed, so some structures are moved to ntlmssp_sign.h Andrew Bartlett
252 lines
7.4 KiB
C
252 lines
7.4 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* Version 3.0
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* NTLMSSP Signing routines
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* Copyright (C) Luke Kenneth Casson Leighton 1996-2001
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* Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2005
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "auth/ntlmssp/ntlmssp.h"
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#include "auth/gensec/gensec.h"
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#include "../libcli/auth/ntlmssp_private.h"
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NTSTATUS gensec_ntlmssp_sign_packet(struct gensec_security *gensec_security,
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TALLOC_CTX *sig_mem_ctx,
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const uint8_t *data, size_t length,
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const uint8_t *whole_pdu, size_t pdu_length,
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DATA_BLOB *sig)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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NTSTATUS nt_status;
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nt_status = ntlmssp_sign_packet(gensec_ntlmssp->ntlmssp_state,
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sig_mem_ctx,
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data, length,
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whole_pdu, pdu_length,
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sig);
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return nt_status;
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}
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NTSTATUS gensec_ntlmssp_check_packet(struct gensec_security *gensec_security,
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TALLOC_CTX *sig_mem_ctx,
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const uint8_t *data, size_t length,
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const uint8_t *whole_pdu, size_t pdu_length,
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const DATA_BLOB *sig)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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NTSTATUS nt_status;
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nt_status = ntlmssp_check_packet(gensec_ntlmssp->ntlmssp_state,
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data, length,
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whole_pdu, pdu_length,
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sig);
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return nt_status;
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}
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NTSTATUS gensec_ntlmssp_seal_packet(struct gensec_security *gensec_security,
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TALLOC_CTX *sig_mem_ctx,
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uint8_t *data, size_t length,
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const uint8_t *whole_pdu, size_t pdu_length,
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DATA_BLOB *sig)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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NTSTATUS nt_status;
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nt_status = ntlmssp_seal_packet(gensec_ntlmssp->ntlmssp_state,
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sig_mem_ctx,
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data, length,
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whole_pdu, pdu_length,
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sig);
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return nt_status;
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}
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/*
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wrappers for the ntlmssp_*() functions
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*/
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NTSTATUS gensec_ntlmssp_unseal_packet(struct gensec_security *gensec_security,
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TALLOC_CTX *sig_mem_ctx,
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uint8_t *data, size_t length,
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const uint8_t *whole_pdu, size_t pdu_length,
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const DATA_BLOB *sig)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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NTSTATUS nt_status;
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nt_status = ntlmssp_unseal_packet(gensec_ntlmssp->ntlmssp_state,
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data, length,
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whole_pdu, pdu_length,
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sig);
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return nt_status;
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}
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size_t gensec_ntlmssp_sig_size(struct gensec_security *gensec_security, size_t data_size)
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{
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return NTLMSSP_SIG_SIZE;
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}
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NTSTATUS gensec_ntlmssp_wrap(struct gensec_security *gensec_security,
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TALLOC_CTX *sig_mem_ctx,
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const DATA_BLOB *in,
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DATA_BLOB *out)
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{
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DATA_BLOB sig;
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NTSTATUS nt_status;
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if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
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*out = data_blob_talloc(sig_mem_ctx, NULL, in->length + NTLMSSP_SIG_SIZE);
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if (!out->data) {
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return NT_STATUS_NO_MEMORY;
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}
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memcpy(out->data + NTLMSSP_SIG_SIZE, in->data, in->length);
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nt_status = gensec_ntlmssp_seal_packet(gensec_security, sig_mem_ctx,
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out->data + NTLMSSP_SIG_SIZE,
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out->length - NTLMSSP_SIG_SIZE,
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out->data + NTLMSSP_SIG_SIZE,
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out->length - NTLMSSP_SIG_SIZE,
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&sig);
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if (NT_STATUS_IS_OK(nt_status)) {
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memcpy(out->data, sig.data, NTLMSSP_SIG_SIZE);
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}
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return nt_status;
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} else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
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*out = data_blob_talloc(sig_mem_ctx, NULL, in->length + NTLMSSP_SIG_SIZE);
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if (!out->data) {
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return NT_STATUS_NO_MEMORY;
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}
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memcpy(out->data + NTLMSSP_SIG_SIZE, in->data, in->length);
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nt_status = gensec_ntlmssp_sign_packet(gensec_security, sig_mem_ctx,
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out->data + NTLMSSP_SIG_SIZE,
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out->length - NTLMSSP_SIG_SIZE,
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out->data + NTLMSSP_SIG_SIZE,
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out->length - NTLMSSP_SIG_SIZE,
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&sig);
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if (NT_STATUS_IS_OK(nt_status)) {
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memcpy(out->data, sig.data, NTLMSSP_SIG_SIZE);
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}
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return nt_status;
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} else {
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*out = *in;
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return NT_STATUS_OK;
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}
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}
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NTSTATUS gensec_ntlmssp_unwrap(struct gensec_security *gensec_security,
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TALLOC_CTX *sig_mem_ctx,
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const DATA_BLOB *in,
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DATA_BLOB *out)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
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DATA_BLOB sig;
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if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
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if (in->length < NTLMSSP_SIG_SIZE) {
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return NT_STATUS_INVALID_PARAMETER;
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}
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sig.data = in->data;
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sig.length = NTLMSSP_SIG_SIZE;
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*out = data_blob_talloc(sig_mem_ctx, in->data + NTLMSSP_SIG_SIZE, in->length - NTLMSSP_SIG_SIZE);
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return gensec_ntlmssp_unseal_packet(gensec_security, sig_mem_ctx,
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out->data, out->length,
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out->data, out->length,
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&sig);
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} else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
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NTSTATUS status;
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struct ntlmssp_crypt_direction save_direction;
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if (in->length < NTLMSSP_SIG_SIZE) {
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return NT_STATUS_INVALID_PARAMETER;
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}
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sig.data = in->data;
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sig.length = NTLMSSP_SIG_SIZE;
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*out = data_blob_talloc(sig_mem_ctx, in->data + NTLMSSP_SIG_SIZE, in->length - NTLMSSP_SIG_SIZE);
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if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
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save_direction = ntlmssp_state->crypt->ntlm2.receiving;
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} else {
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save_direction = ntlmssp_state->crypt->ntlm;
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}
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status = gensec_ntlmssp_check_packet(gensec_security, sig_mem_ctx,
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out->data, out->length,
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out->data, out->length,
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&sig);
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if (!NT_STATUS_IS_OK(status)) {
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NTSTATUS check_status = status;
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/*
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* The Windows LDAP libraries seems to have a bug
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* and always use sealing even if only signing was
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* negotiated. So we need to fallback.
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*/
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if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
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ntlmssp_state->crypt->ntlm2.receiving = save_direction;
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} else {
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ntlmssp_state->crypt->ntlm = save_direction;
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}
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status = gensec_ntlmssp_unseal_packet(gensec_security,
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sig_mem_ctx,
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out->data,
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out->length,
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out->data,
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out->length,
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&sig);
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if (NT_STATUS_IS_OK(status)) {
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ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
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} else {
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status = check_status;
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}
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}
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(1, ("NTLMSSP packet check for unwrap failed due to invalid signature\n"));
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}
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return status;
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} else {
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*out = *in;
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return NT_STATUS_OK;
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}
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}
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