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authorVolker Lendecke <vlendec@samba.org>2003-04-09 09:29:47 +0000
committerVolker Lendecke <vlendec@samba.org>2003-04-09 09:29:47 +0000
commit425797700b24c14c252389c2ff6cf3b569d7ee22 (patch)
tree1229e216524b556f3807ccf353f641ec6a0acd82 /source3/rpc_parse
parent61c1aa404503731edee0e7d7bae4b8bbf7f992d3 (diff)
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Put the core schannel functions to parse_prs.c. They are also used by
schannel clients. Volker (This used to be commit 41e92409e1c6912db05acc80b6c0d5dccd51859b)
Diffstat (limited to 'source3/rpc_parse')
-rw-r--r--source3/rpc_parse/parse_prs.c182
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;
+}