r5992: Rename schannel.c -> schannel_sign.c. The rest of the schannel code

(from librpc) will be moved into schannel.c soon.

Andrew Bartlett
(This used to be commit d6c80ff74b0550641c253316b37f1050c207791c)

1 files changed, 0 insertions, 293 deletions

diff --git a/source4/libcli/auth/schannel.c b/source4/libcli/auth/schannel.c
deleted file mode 100644
index d582ff2dd0..0000000000
--- a/source4/libcli/auth/schannel.c
+++ /dev/null
@@ -1,293 +0,0 @@
-/* 
-   Unix SMB/CIFS implementation.
-
-   schannel library code
-
-   Copyright (C) Andrew Tridgell 2004
-   
-   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"
-
-struct schannel_state {
-	uint8_t session_key[16];
-	uint32_t seq_num;
-	BOOL initiator;
-};
-
-#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->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 schannel_state *state,
-				TALLOC_CTX *mem_ctx, 
-				uint8_t *data, size_t length, 
-				DATA_BLOB *sig)
-{
-	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->session_key, seq_num, sealing_key);
-	arcfour_crypt(confounder, sealing_key, 8);
-	arcfour_crypt(data, sealing_key, length);
-
-	schannel_digest(state->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 schannel_state *state, 
-			       const uint8_t *data, size_t length, 
-			       const DATA_BLOB *sig)
-{
-	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->session_key, 16);
-
-	schannel_digest(state->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 schannel_state *state, 
-			      TALLOC_CTX *mem_ctx, 
-			      uint8_t *data, size_t length, 
-			      DATA_BLOB *sig)
-{
-	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->session_key, 
-			netsec_sig, confounder, 
-			data, length, digest_final);
-
-	netsec_get_sealing_key(state->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 schannel_state *state, 
-			      TALLOC_CTX *mem_ctx, 
-			      const uint8_t *data, size_t length, 
-			      DATA_BLOB *sig)
-{
-	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->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;
-}
-
-/*
-  create an schannel context state
-*/
-NTSTATUS schannel_start(TALLOC_CTX *mem_ctx, 
-			struct schannel_state **state,
-			const uint8_t session_key[16],
-			BOOL initiator)
-{
-	(*state) = talloc(mem_ctx, struct schannel_state);
-	if (!(*state)) {
-		return NT_STATUS_NO_MEMORY;
-	}
-
-	memcpy((*state)->session_key, session_key, 16);
-	(*state)->initiator = initiator;
-	(*state)->seq_num = 0;
-
-	return NT_STATUS_OK;
-}