Put the core schannel functions to parse_prs.c. They are also used by

schannel clients.

Volker
(This used to be commit 0f348a35d09ff020837119157ef7f4b9e6f07643)

1 files changed, 182 insertions, 0 deletions

diff --git a/source3/rpc_parse/parse_prs.c b/source3/rpc_parse/parse_prs.c
index aeaa42ac92..a22ae1bacd 100644
--- a/source3/rpc_parse/parse_prs.c
+++ b/source3/rpc_parse/parse_prs.c
@@ -1330,3 +1330,185 @@ BOOL prs_hash1(prs_struct *ps, uint32 offset, uint8 sess_key[16])
 
 	return True;
 }
+
+static void netsechash(uchar * key, uchar * data, int data_len)
+{
+	uchar hash[256];
+	uchar index_i = 0;
+	uchar index_j = 0;
+	uchar j = 0;
+	int ind;
+
+	for (ind = 0; ind < 256; ind++)
+	{
+		hash[ind] = (uchar) ind;
+	}
+
+	for (ind = 0; ind < 256; ind++)
+	{
+		uchar tc;
+
+		j += (hash[ind] + key[ind % 16]);
+
+		tc = hash[ind];
+		hash[ind] = hash[j];
+		hash[j] = tc;
+	}
+
+	for (ind = 0; ind < data_len; ind++)
+	{
+		uchar tc;
+		uchar t;
+
+		index_i++;
+		index_j += hash[index_i];
+
+		tc = hash[index_i];
+		hash[index_i] = hash[index_j];
+		hash[index_j] = tc;
+
+		t = hash[index_i] + hash[index_j];
+		data[ind] ^= hash[t];
+	}
+}
+
+void dump_data_pw(const char *msg, const uchar * data, size_t len)
+{
+#ifdef DEBUG_PASSWORD
+	DEBUG(11, ("%s", msg));
+	if (data != NULL && len > 0)
+	{
+		dump_data(11, data, len);
+	}
+#endif
+}
+
+void netsec_encode(struct netsec_auth_struct *a,
+		   RPC_AUTH_NETSEC_CHK * verf, char *data, size_t data_len)
+{
+	uchar dataN[4];
+	uchar digest1[16];
+	struct MD5Context ctx3;
+	uchar sess_kf0[16];
+	int i;
+
+	/* store the sequence number */
+	SIVAL(dataN, 0, a->seq_num);
+
+	for (i = 0; i < sizeof(sess_kf0); i++)
+	{
+		sess_kf0[i] = a->sess_key[i] ^ 0xf0;
+	}
+
+	dump_data_pw("a->sess_key:\n", a->sess_key, sizeof(a->sess_key));
+	dump_data_pw("a->seq_num :\n", dataN, sizeof(dataN));
+
+	MD5Init(&ctx3);
+	MD5Update(&ctx3, dataN, 0x4);
+	MD5Update(&ctx3, verf->sig, 8);
+
+	MD5Update(&ctx3, verf->data8, 8);
+
+	dump_data_pw("verf->data8:\n", verf->data8, sizeof(verf->data8));
+	dump_data_pw("sess_kf0:\n", sess_kf0, sizeof(sess_kf0));
+
+	hmac_md5(sess_kf0, dataN, 0x4, digest1);
+	dump_data_pw("digest1 (ebp-8):\n", digest1, sizeof(digest1));
+	hmac_md5(digest1, verf->data3, 8, digest1);
+	dump_data_pw("netsechashkey:\n", digest1, sizeof(digest1));
+	netsechash(digest1, verf->data8, 8);
+
+	dump_data_pw("verf->data8:\n", verf->data8, sizeof(verf->data8));
+
+	dump_data_pw("data   :\n", data, data_len);
+	MD5Update(&ctx3, data, data_len);
+
+	{
+		char digest_tmp[16];
+		char digest2[16];
+		MD5Final(digest_tmp, &ctx3);
+		hmac_md5(a->sess_key, digest_tmp, 16, digest2);
+		dump_data_pw("digest_tmp:\n", digest_tmp, sizeof(digest_tmp));
+		dump_data_pw("digest:\n", digest2, sizeof(digest2));
+		memcpy(verf->data1, digest2, sizeof(verf->data1));
+	}
+
+	netsechash(digest1, data, data_len);
+	dump_data_pw("data:\n", data, data_len);
+
+	hmac_md5(a->sess_key, dataN, 0x4, digest1);
+	dump_data_pw("ctx:\n", digest1, sizeof(digest1));
+
+	hmac_md5(digest1, verf->data1, 8, digest1);
+
+	dump_data_pw("netsechashkey:\n", digest1, sizeof(digest1));
+
+	dump_data_pw("verf->data3:\n", verf->data3, sizeof(verf->data3));
+	netsechash(digest1, verf->data3, 8);
+	dump_data_pw("verf->data3:\n", verf->data3, sizeof(verf->data3));
+
+	return;
+}
+
+BOOL netsec_decode(struct netsec_auth_struct *a,
+		   RPC_AUTH_NETSEC_CHK * verf, char *data, size_t data_len)
+{
+	uchar dataN[4];
+	uchar digest1[16];
+	struct MD5Context ctx3;
+	uchar sess_kf0[16];
+	int i;
+
+	/* store the sequence number */
+	SIVAL(dataN, 0, a->seq_num);
+
+	for (i = 0; i < sizeof(sess_kf0); i++)
+	{
+		sess_kf0[i] = a->sess_key[i] ^ 0xf0;
+	}
+
+	dump_data_pw("a->sess_key:\n", a->sess_key, sizeof(a->sess_key));
+	dump_data_pw("a->seq_num :\n", dataN, sizeof(dataN));
+	hmac_md5(a->sess_key, dataN, 0x4, digest1);
+	dump_data_pw("ctx:\n", digest1, sizeof(digest1));
+
+	hmac_md5(digest1, verf->data1, 8, digest1);
+
+	dump_data_pw("netsechashkey:\n", digest1, sizeof(digest1));
+	dump_data_pw("verf->data3:\n", verf->data3, sizeof(verf->data3));
+	netsechash(digest1, verf->data3, 8);
+	dump_data_pw("verf->data3_dec:\n", verf->data3, sizeof(verf->data3));
+
+	MD5Init(&ctx3);
+	MD5Update(&ctx3, dataN, 0x4);
+	MD5Update(&ctx3, verf->sig, 8);
+
+	dump_data_pw("sess_kf0:\n", sess_kf0, sizeof(sess_kf0));
+
+	hmac_md5(sess_kf0, dataN, 0x4, digest1);
+	dump_data_pw("digest1 (ebp-8):\n", digest1, sizeof(digest1));
+	hmac_md5(digest1, verf->data3, 8, digest1);
+	dump_data_pw("netsechashkey:\n", digest1, sizeof(digest1));
+
+	dump_data_pw("verf->data8:\n", verf->data8, sizeof(verf->data8));
+	netsechash(digest1, verf->data8, 8);
+	dump_data_pw("verf->data8_dec:\n", verf->data8, sizeof(verf->data8));
+	MD5Update(&ctx3, verf->data8, 8);
+
+	dump_data_pw("data   :\n", data, data_len);
+	netsechash(digest1, data, data_len);
+	dump_data_pw("datadec:\n", data, data_len);
+
+	MD5Update(&ctx3, data, data_len);
+	{
+		uchar digest_tmp[16];
+		MD5Final(digest_tmp, &ctx3);
+		hmac_md5(a->sess_key, digest_tmp, 16, digest1);
+		dump_data_pw("digest_tmp:\n", digest_tmp, sizeof(digest_tmp));
+	}
+
+	dump_data_pw("digest:\n", digest1, sizeof(digest1));
+	dump_data_pw("verf->data1:\n", verf->data1, sizeof(verf->data1));
+
+	return memcmp(digest1, verf->data1, sizeof(verf->data1)) == 0;
+}