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-rw-r--r--source4/libcli/auth/schannel_sign.c284
1 files changed, 0 insertions, 284 deletions
diff --git a/source4/libcli/auth/schannel_sign.c b/source4/libcli/auth/schannel_sign.c
deleted file mode 100644
index 3b493bd0d3..0000000000
--- a/source4/libcli/auth/schannel_sign.c
+++ /dev/null
@@ -1,284 +0,0 @@
-/*
- Unix SMB/CIFS implementation.
-
- schannel library code
-
- Copyright (C) Andrew Tridgell 2004
- Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#include "includes.h"
-#include "lib/crypto/crypto.h"
-#include "libcli/auth/schannel.h"
-#include "libcli/auth/gensec.h"
-#include "libcli/auth/credentials.h"
-
-#define NETSEC_SIGN_SIGNATURE { 0x77, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00 }
-#define NETSEC_SEAL_SIGNATURE { 0x77, 0x00, 0x7a, 0x00, 0xff, 0xff, 0x00, 0x00 }
-
-/*******************************************************************
- Encode or Decode the sequence number (which is symmetric)
- ********************************************************************/
-static void netsec_deal_with_seq_num(struct schannel_state *state,
- const uint8_t packet_digest[8],
- uint8_t seq_num[8])
-{
- static const uint8_t zeros[4];
- uint8_t sequence_key[16];
- uint8_t digest1[16];
-
- hmac_md5(state->creds->session_key, zeros, sizeof(zeros), digest1);
- hmac_md5(digest1, packet_digest, 8, sequence_key);
- arcfour_crypt(seq_num, sequence_key, 8);
-
- state->seq_num++;
-}
-
-
-/*******************************************************************
- Calculate the key with which to encode the data payload
- ********************************************************************/
-static void netsec_get_sealing_key(const uint8_t session_key[16],
- const uint8_t seq_num[8],
- uint8_t sealing_key[16])
-{
- static const uint8_t zeros[4];
- uint8_t digest2[16];
- uint8_t sess_kf0[16];
- int i;
-
- for (i = 0; i < 16; i++) {
- sess_kf0[i] = session_key[i] ^ 0xf0;
- }
-
- hmac_md5(sess_kf0, zeros, 4, digest2);
- hmac_md5(digest2, seq_num, 8, sealing_key);
-}
-
-
-/*******************************************************************
- Create a digest over the entire packet (including the data), and
- MD5 it with the session key.
- ********************************************************************/
-static void schannel_digest(const uint8_t sess_key[16],
- const uint8_t netsec_sig[8],
- const uint8_t *confounder,
- const uint8_t *data, size_t data_len,
- uint8_t digest_final[16])
-{
- uint8_t packet_digest[16];
- static const uint8_t zeros[4];
- struct MD5Context ctx;
-
- MD5Init(&ctx);
- MD5Update(&ctx, zeros, 4);
- MD5Update(&ctx, netsec_sig, 8);
- if (confounder) {
- MD5Update(&ctx, confounder, 8);
- }
- MD5Update(&ctx, data, data_len);
- MD5Final(packet_digest, &ctx);
-
- hmac_md5(sess_key, packet_digest, sizeof(packet_digest), digest_final);
-}
-
-
-/*
- unseal a packet
-*/
-NTSTATUS schannel_unseal_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- DATA_BLOB *sig)
-{
- struct schannel_state *state = gensec_security->private_data;
-
- uint8_t digest_final[16];
- uint8_t confounder[8];
- uint8_t seq_num[8];
- uint8_t sealing_key[16];
- static const uint8_t netsec_sig[8] = NETSEC_SEAL_SIGNATURE;
-
- if (sig->length != 32) {
- return NT_STATUS_ACCESS_DENIED;
- }
-
- memcpy(confounder, sig->data+24, 8);
-
- RSIVAL(seq_num, 0, state->seq_num);
- SIVAL(seq_num, 4, state->initiator?0:0x80);
-
- netsec_get_sealing_key(state->creds->session_key, seq_num, sealing_key);
- arcfour_crypt(confounder, sealing_key, 8);
- arcfour_crypt(data, sealing_key, length);
-
- schannel_digest(state->creds->session_key,
- netsec_sig, confounder,
- data, length, digest_final);
-
- if (memcmp(digest_final, sig->data+16, 8) != 0) {
- dump_data_pw("calc digest:", digest_final, 8);
- dump_data_pw("wire digest:", sig->data+16, 8);
- return NT_STATUS_ACCESS_DENIED;
- }
-
- netsec_deal_with_seq_num(state, digest_final, seq_num);
-
- if (memcmp(seq_num, sig->data+8, 8) != 0) {
- dump_data_pw("calc seq num:", seq_num, 8);
- dump_data_pw("wire seq num:", sig->data+8, 8);
- return NT_STATUS_ACCESS_DENIED;
- }
-
- return NT_STATUS_OK;
-}
-
-/*
- check the signature on a packet
-*/
-NTSTATUS schannel_check_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- const uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- const DATA_BLOB *sig)
-{
- struct schannel_state *state = gensec_security->private_data;
-
- uint8_t digest_final[16];
- uint8_t seq_num[8];
- static const uint8_t netsec_sig[8] = NETSEC_SIGN_SIGNATURE;
-
- /* w2k sends just 24 bytes and skip the confounder */
- if (sig->length != 32 && sig->length != 24) {
- return NT_STATUS_ACCESS_DENIED;
- }
-
- RSIVAL(seq_num, 0, state->seq_num);
- SIVAL(seq_num, 4, state->initiator?0:0x80);
-
- dump_data_pw("seq_num:\n", seq_num, 8);
- dump_data_pw("sess_key:\n", state->creds->session_key, 16);
-
- schannel_digest(state->creds->session_key,
- netsec_sig, NULL,
- data, length, digest_final);
-
- netsec_deal_with_seq_num(state, digest_final, seq_num);
-
- if (memcmp(seq_num, sig->data+8, 8) != 0) {
- dump_data_pw("calc seq num:", seq_num, 8);
- dump_data_pw("wire seq num:", sig->data+8, 8);
- return NT_STATUS_ACCESS_DENIED;
- }
-
- if (memcmp(digest_final, sig->data+16, 8) != 0) {
- dump_data_pw("calc digest:", digest_final, 8);
- dump_data_pw("wire digest:", sig->data+16, 8);
- return NT_STATUS_ACCESS_DENIED;
- }
-
- return NT_STATUS_OK;
-}
-
-
-/*
- seal a packet
-*/
-NTSTATUS schannel_seal_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- DATA_BLOB *sig)
-{
- struct schannel_state *state = gensec_security->private_data;
-
- uint8_t digest_final[16];
- uint8_t confounder[8];
- uint8_t seq_num[8];
- uint8_t sealing_key[16];
- static const uint8_t netsec_sig[8] = NETSEC_SEAL_SIGNATURE;
-
- generate_random_buffer(confounder, 8);
-
- RSIVAL(seq_num, 0, state->seq_num);
- SIVAL(seq_num, 4, state->initiator?0x80:0);
-
- schannel_digest(state->creds->session_key,
- netsec_sig, confounder,
- data, length, digest_final);
-
- netsec_get_sealing_key(state->creds->session_key, seq_num, sealing_key);
- arcfour_crypt(confounder, sealing_key, 8);
- arcfour_crypt(data, sealing_key, length);
-
- netsec_deal_with_seq_num(state, digest_final, seq_num);
-
- (*sig) = data_blob_talloc(mem_ctx, NULL, 32);
-
- memcpy(sig->data, netsec_sig, 8);
- memcpy(sig->data+8, seq_num, 8);
- memcpy(sig->data+16, digest_final, 8);
- memcpy(sig->data+24, confounder, 8);
-
- dump_data_pw("signature:", sig->data+ 0, 8);
- dump_data_pw("seq_num :", sig->data+ 8, 8);
- dump_data_pw("digest :", sig->data+16, 8);
- dump_data_pw("confound :", sig->data+24, 8);
-
- return NT_STATUS_OK;
-}
-
-
-/*
- sign a packet
-*/
-NTSTATUS schannel_sign_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- const uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- DATA_BLOB *sig)
-{
- struct schannel_state *state = gensec_security->private_data;
-
- uint8_t digest_final[16];
- uint8_t seq_num[8];
- static const uint8_t netsec_sig[8] = NETSEC_SIGN_SIGNATURE;
-
- RSIVAL(seq_num, 0, state->seq_num);
- SIVAL(seq_num, 4, state->initiator?0x80:0);
-
- schannel_digest(state->creds->session_key,
- netsec_sig, NULL,
- data, length, digest_final);
-
- netsec_deal_with_seq_num(state, digest_final, seq_num);
-
- (*sig) = data_blob_talloc(mem_ctx, NULL, 32);
-
- memcpy(sig->data, netsec_sig, 8);
- memcpy(sig->data+8, seq_num, 8);
- memcpy(sig->data+16, digest_final, 8);
- memset(sig->data+24, 0, 8);
-
- dump_data_pw("signature:", sig->data+ 0, 8);
- dump_data_pw("seq_num :", sig->data+ 8, 8);
- dump_data_pw("digest :", sig->data+16, 8);
- dump_data_pw("confound :", sig->data+24, 8);
-
- return NT_STATUS_OK;
-}
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