libcli/auth: rewrite schannel sign/seal code to be more generic
[ira/wip.git] / source3 / rpc_server / srv_pipe.c
index 257094e35f1026f568c7454ff72234588b477678..627dac0f8212e314e338b10f0c363a8388d261d0 100644 (file)
@@ -30,6 +30,8 @@
 #include "includes.h"
 #include "../libcli/auth/libcli_auth.h"
 #include "../librpc/gen_ndr/ndr_schannel.h"
+#include "../libcli/auth/schannel.h"
+#include "../libcli/auth/schannel_proto.h"
 
 extern struct current_user current_user;
 
@@ -82,11 +84,11 @@ static bool create_next_pdu_ntlmssp(pipes_struct *p)
        memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
 
        /* Change the incoming request header to a response. */
-       p->hdr.pkt_type = RPC_RESPONSE;
+       p->hdr.pkt_type = DCERPC_PKT_RESPONSE;
 
        /* Set up rpc header flags. */
        if (p->out_data.data_sent_length == 0) {
-               p->hdr.flags = RPC_FLG_FIRST;
+               p->hdr.flags = DCERPC_PFC_FLAG_FIRST;
        } else {
                p->hdr.flags = 0;
        }
@@ -128,7 +130,7 @@ static bool create_next_pdu_ntlmssp(pipes_struct *p)
         */
 
        if(p->out_data.data_sent_length + data_len >= prs_offset(&p->out_data.rdata)) {
-               p->hdr.flags |= RPC_FLG_LAST;
+               p->hdr.flags |= DCERPC_PFC_FLAG_LAST;
                if (data_len_left % 8) {
                        ss_padding_len = 8 - (data_len_left % 8);
                        DEBUG(10,("create_next_pdu_ntlmssp: adding sign/seal padding of %u\n",
@@ -192,9 +194,9 @@ static bool create_next_pdu_ntlmssp(pipes_struct *p)
 
        /* Now write out the auth header and null blob. */
        if (p->auth.auth_type == PIPE_AUTH_TYPE_NTLMSSP) {
-               auth_type = RPC_NTLMSSP_AUTH_TYPE;
+               auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
        } else {
-               auth_type = RPC_SPNEGO_AUTH_TYPE;
+               auth_type = DCERPC_AUTH_TYPE_SPNEGO;
        }
        if (p->auth.auth_level == DCERPC_AUTH_LEVEL_PRIVACY) {
                auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
@@ -285,6 +287,7 @@ static bool create_next_pdu_schannel(pipes_struct *p)
        uint32 data_space_available;
        uint32 data_len_left;
        uint32 data_pos;
+       NTSTATUS status;
 
        /*
         * If we're in the fault state, keep returning fault PDU's until
@@ -299,11 +302,11 @@ static bool create_next_pdu_schannel(pipes_struct *p)
        memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
 
        /* Change the incoming request header to a response. */
-       p->hdr.pkt_type = RPC_RESPONSE;
+       p->hdr.pkt_type = DCERPC_PKT_RESPONSE;
 
        /* Set up rpc header flags. */
        if (p->out_data.data_sent_length == 0) {
-               p->hdr.flags = RPC_FLG_FIRST;
+               p->hdr.flags = DCERPC_PFC_FLAG_FIRST;
        } else {
                p->hdr.flags = 0;
        }
@@ -346,7 +349,7 @@ static bool create_next_pdu_schannel(pipes_struct *p)
         */
 
        if(p->out_data.data_sent_length + data_len >= prs_offset(&p->out_data.rdata)) {
-               p->hdr.flags |= RPC_FLG_LAST;
+               p->hdr.flags |= DCERPC_PFC_FLAG_LAST;
                if (data_len_left % 8) {
                        ss_padding_len = 8 - (data_len_left % 8);
                        DEBUG(10,("create_next_pdu_schannel: adding sign/seal padding of %u\n",
@@ -407,14 +410,13 @@ static bool create_next_pdu_schannel(pipes_struct *p)
                 * Schannel processing.
                 */
                RPC_HDR_AUTH auth_info;
-               struct NL_AUTH_SIGNATURE verf;
                DATA_BLOB blob;
-               enum ndr_err_code ndr_err;
+               uint8_t *data;
 
                /* Check it's the type of reply we were expecting to decode */
 
                init_rpc_hdr_auth(&auth_info,
-                               RPC_SCHANNEL_AUTH_TYPE,
+                               DCERPC_AUTH_TYPE_SCHANNEL,
                                p->auth.auth_level == DCERPC_AUTH_LEVEL_PRIVACY ?
                                        DCERPC_AUTH_LEVEL_PRIVACY : DCERPC_AUTH_LEVEL_INTEGRITY,
                                ss_padding_len, 1);
@@ -426,30 +428,47 @@ static bool create_next_pdu_schannel(pipes_struct *p)
                        return False;
                }
 
-               schannel_encode(p->auth.a_u.schannel_auth, 
-                               p->auth.auth_level, SENDER_IS_ACCEPTOR, &verf,
-                               prs_data_p(&p->out_data.frag) + data_pos,
-                               data_len + ss_padding_len);
+               data = (uint8_t *)prs_data_p(&p->out_data.frag) + data_pos;
 
-               /* Finally marshall the blob. */
+               switch (p->auth.auth_level) {
+               case DCERPC_AUTH_LEVEL_PRIVACY:
+                       status = netsec_outgoing_packet(p->auth.a_u.schannel_auth,
+                                                       talloc_tos(),
+                                                       true,
+                                                       data,
+                                                       data_len + ss_padding_len,
+                                                       &blob);
+                       break;
+               case DCERPC_AUTH_LEVEL_INTEGRITY:
+                       status = netsec_outgoing_packet(p->auth.a_u.schannel_auth,
+                                                       talloc_tos(),
+                                                       false,
+                                                       data,
+                                                       data_len + ss_padding_len,
+                                                       &blob);
+                       break;
+               default:
+                       status = NT_STATUS_INTERNAL_ERROR;
+                       break;
+               }
 
-               ndr_err = ndr_push_struct_blob(&blob, talloc_tos(), NULL, &verf,
-                                      (ndr_push_flags_fn_t)ndr_push_NL_AUTH_SIGNATURE);
-               if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+               if (!NT_STATUS_IS_OK(status)) {
+                       DEBUG(0,("create_next_pdu_schannel: failed to process packet: %s\n",
+                               nt_errstr(status)));
                        prs_mem_free(&p->out_data.frag);
                        return false;
                }
 
+               /* Finally marshall the blob. */
+
                if (DEBUGLEVEL >= 10) {
-                       NDR_PRINT_DEBUG(NL_AUTH_SIGNATURE, &verf);
+                       dump_NL_AUTH_SIGNATURE(talloc_tos(), &blob);
                }
 
                if (!prs_copy_data_in(&p->out_data.frag, (const char *)blob.data, blob.length)) {
                        prs_mem_free(&p->out_data.frag);
                        return false;
                }
-
-               p->auth.a_u.schannel_auth->seq_num++;
        }
 
        /*
@@ -487,11 +506,11 @@ static bool create_next_pdu_noauth(pipes_struct *p)
        memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
 
        /* Change the incoming request header to a response. */
-       p->hdr.pkt_type = RPC_RESPONSE;
+       p->hdr.pkt_type = DCERPC_PKT_RESPONSE;
 
        /* Set up rpc header flags. */
        if (p->out_data.data_sent_length == 0) {
-               p->hdr.flags = RPC_FLG_FIRST;
+               p->hdr.flags = DCERPC_PFC_FLAG_FIRST;
        } else {
                p->hdr.flags = 0;
        }
@@ -533,7 +552,7 @@ static bool create_next_pdu_noauth(pipes_struct *p)
         */
 
        if(p->out_data.data_sent_length + data_len >= prs_offset(&p->out_data.rdata)) {
-               p->hdr.flags |= RPC_FLG_LAST;
+               p->hdr.flags |= DCERPC_PFC_FLAG_LAST;
        }
 
        /*
@@ -750,7 +769,7 @@ bool api_pipe_bind_auth3(pipes_struct *p, prs_struct *rpc_in_p)
                goto err;
        }
 
-       if (auth_info.auth_type != RPC_NTLMSSP_AUTH_TYPE) {
+       if (auth_info.auth_type != DCERPC_AUTH_TYPE_NTLMSSP) {
                DEBUG(0,("api_pipe_bind_auth3: incorrect auth type (%u).\n",
                        (unsigned int)auth_info.auth_type ));
                return False;
@@ -812,7 +831,7 @@ static bool setup_bind_nak(pipes_struct *p)
         * Initialize a bind_nak header.
         */
 
-       init_rpc_hdr(&nak_hdr, RPC_BINDNACK, RPC_FLG_FIRST | RPC_FLG_LAST,
+       init_rpc_hdr(&nak_hdr, DCERPC_PKT_BIND_NAK, DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST,
                p->hdr.call_id, RPC_HEADER_LEN + sizeof(uint16), 0);
 
        /*
@@ -872,7 +891,7 @@ bool setup_fault_pdu(pipes_struct *p, NTSTATUS status)
         * Initialize a fault header.
         */
 
-       init_rpc_hdr(&fault_hdr, RPC_FAULT, RPC_FLG_FIRST | RPC_FLG_LAST | RPC_FLG_NOCALL,
+       init_rpc_hdr(&fault_hdr, DCERPC_PKT_FAULT, DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST | DCERPC_PFC_FLAG_DID_NOT_EXECUTE,
             p->hdr.call_id, RPC_HEADER_LEN + RPC_HDR_RESP_LEN + RPC_HDR_FAULT_LEN, 0);
 
        /*
@@ -939,7 +958,7 @@ bool setup_cancel_ack_reply(pipes_struct *p, prs_struct *rpc_in_p)
         * Initialize a cancel_ack header.
         */
 
-       init_rpc_hdr(&ack_reply_hdr, RPC_CANCEL_ACK, RPC_FLG_FIRST | RPC_FLG_LAST,
+       init_rpc_hdr(&ack_reply_hdr, DCERPC_PKT_CANCEL_ACK, DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST,
                        p->hdr.call_id, RPC_HEADER_LEN, 0);
 
        /*
@@ -1204,7 +1223,7 @@ static bool pipe_spnego_auth_bind_negotiate(pipes_struct *p, prs_struct *rpc_in_
        }
 
        /* Copy the blob into the pout_auth parse struct */
-       init_rpc_hdr_auth(&auth_info, RPC_SPNEGO_AUTH_TYPE, pauth_info->auth_level, RPC_HDR_AUTH_LEN, 1);
+       init_rpc_hdr_auth(&auth_info, DCERPC_AUTH_TYPE_SPNEGO, pauth_info->auth_level, RPC_HDR_AUTH_LEN, 1);
        if(!smb_io_rpc_hdr_auth("", &auth_info, pout_auth, 0)) {
                DEBUG(0,("pipe_spnego_auth_bind_negotiate: marshalling of RPC_HDR_AUTH failed.\n"));
                goto err;
@@ -1302,7 +1321,7 @@ static bool pipe_spnego_auth_bind_continue(pipes_struct *p, prs_struct *rpc_in_p
        response = spnego_gen_auth_response(&auth_reply, NT_STATUS_OK, OID_NTLMSSP);
 
        /* Copy the blob into the pout_auth parse struct */
-       init_rpc_hdr_auth(&auth_info, RPC_SPNEGO_AUTH_TYPE, pauth_info->auth_level, RPC_HDR_AUTH_LEN, 1);
+       init_rpc_hdr_auth(&auth_info, DCERPC_AUTH_TYPE_SPNEGO, pauth_info->auth_level, RPC_HDR_AUTH_LEN, 1);
        if(!smb_io_rpc_hdr_auth("", &auth_info, pout_auth, 0)) {
                DEBUG(0,("pipe_spnego_auth_bind_continue: marshalling of RPC_HDR_AUTH failed.\n"));
                goto err;
@@ -1376,7 +1395,7 @@ static bool pipe_schannel_auth_bind(pipes_struct *p, prs_struct *rpc_in_p,
         */
 
        become_root();
-       status = schannel_fetch_session_key(p->mem_ctx,
+       status = schannel_fetch_session_key(p,
                                            neg.oem_netbios_computer.a,
                                            &creds);
        unbecome_root();
@@ -1386,19 +1405,16 @@ static bool pipe_schannel_auth_bind(pipes_struct *p, prs_struct *rpc_in_p,
                return False;
        }
 
-       p->auth.a_u.schannel_auth = talloc(p, struct schannel_auth_struct);
+       p->auth.a_u.schannel_auth = talloc(p, struct schannel_state);
        if (!p->auth.a_u.schannel_auth) {
                TALLOC_FREE(creds);
                return False;
        }
 
-       memset(p->auth.a_u.schannel_auth->sess_key, 0, sizeof(p->auth.a_u.schannel_auth->sess_key));
-       memcpy(p->auth.a_u.schannel_auth->sess_key, creds->session_key,
-                       sizeof(creds->session_key));
-
-       TALLOC_FREE(creds);
-
+       p->auth.a_u.schannel_auth->state = SCHANNEL_STATE_START;
        p->auth.a_u.schannel_auth->seq_num = 0;
+       p->auth.a_u.schannel_auth->initiator = false;
+       p->auth.a_u.schannel_auth->creds = creds;
 
        /*
         * JRA. Should we also copy the schannel session key into the pipe session key p->session_key
@@ -1427,7 +1443,7 @@ static bool pipe_schannel_auth_bind(pipes_struct *p, prs_struct *rpc_in_p,
                return false;
        }
 
-       init_rpc_hdr_auth(&auth_info, RPC_SCHANNEL_AUTH_TYPE, pauth_info->auth_level, RPC_HDR_AUTH_LEN, 1);
+       init_rpc_hdr_auth(&auth_info, DCERPC_AUTH_TYPE_SCHANNEL, pauth_info->auth_level, RPC_HDR_AUTH_LEN, 1);
        if(!smb_io_rpc_hdr_auth("", &auth_info, pout_auth, 0)) {
                DEBUG(0,("pipe_schannel_auth_bind: marshalling of RPC_HDR_AUTH failed.\n"));
                return False;
@@ -1516,7 +1532,7 @@ static bool pipe_ntlmssp_auth_bind(pipes_struct *p, prs_struct *rpc_in_p,
        data_blob_free(&blob);
 
        /* Copy the blob into the pout_auth parse struct */
-       init_rpc_hdr_auth(&auth_info, RPC_NTLMSSP_AUTH_TYPE, pauth_info->auth_level, RPC_HDR_AUTH_LEN, 1);
+       init_rpc_hdr_auth(&auth_info, DCERPC_AUTH_TYPE_NTLMSSP, pauth_info->auth_level, RPC_HDR_AUTH_LEN, 1);
        if(!smb_io_rpc_hdr_auth("", &auth_info, pout_auth, 0)) {
                DEBUG(0,("pipe_ntlmssp_auth_bind: marshalling of RPC_HDR_AUTH failed.\n"));
                goto err;
@@ -1536,7 +1552,7 @@ static bool pipe_ntlmssp_auth_bind(pipes_struct *p, prs_struct *rpc_in_p,
 
        DEBUG(10,("pipe_ntlmssp_auth_bind: NTLMSSP auth started\n"));
 
-       /* We can't set pipe_bound True yet - we need an RPC_AUTH3 response packet... */
+       /* We can't set pipe_bound True yet - we need an DCERPC_PKT_AUTH3 response packet... */
        return True;
 
   err:
@@ -1564,7 +1580,7 @@ bool api_pipe_bind_req(pipes_struct *p, prs_struct *rpc_in_p)
        prs_struct out_auth;
        int i = 0;
        int auth_len = 0;
-       unsigned int auth_type = RPC_ANONYMOUS_AUTH_TYPE;
+       unsigned int auth_type = DCERPC_AUTH_TYPE_NONE;
 
        /* No rebinds on a bound pipe - use alter context. */
        if (p->pipe_bound) {
@@ -1707,26 +1723,26 @@ bool api_pipe_bind_req(pipes_struct *p, prs_struct *rpc_in_p)
        assoc_gid = hdr_rb.bba.assoc_gid ? hdr_rb.bba.assoc_gid : 0x53f0;
 
        switch(auth_type) {
-               case RPC_NTLMSSP_AUTH_TYPE:
+               case DCERPC_AUTH_TYPE_NTLMSSP:
                        if (!pipe_ntlmssp_auth_bind(p, rpc_in_p, &auth_info, &out_auth)) {
                                goto err_exit;
                        }
                        assoc_gid = 0x7a77;
                        break;
 
-               case RPC_SCHANNEL_AUTH_TYPE:
+               case DCERPC_AUTH_TYPE_SCHANNEL:
                        if (!pipe_schannel_auth_bind(p, rpc_in_p, &auth_info, &out_auth)) {
                                goto err_exit;
                        }
                        break;
 
-               case RPC_SPNEGO_AUTH_TYPE:
+               case DCERPC_AUTH_TYPE_SPNEGO:
                        if (!pipe_spnego_auth_bind_negotiate(p, rpc_in_p, &auth_info, &out_auth)) {
                                goto err_exit;
                        }
                        break;
 
-               case RPC_ANONYMOUS_AUTH_TYPE:
+               case DCERPC_AUTH_TYPE_NONE:
                        /* Unauthenticated bind request. */
                        /* We're finished - no more packets. */
                        p->auth.auth_type = PIPE_AUTH_TYPE_NONE;
@@ -1787,7 +1803,7 @@ bool api_pipe_bind_req(pipes_struct *p, prs_struct *rpc_in_p)
                auth_len = prs_offset(&out_auth) - RPC_HDR_AUTH_LEN;
        }
 
-       init_rpc_hdr(&p->hdr, RPC_BINDACK, RPC_FLG_FIRST | RPC_FLG_LAST,
+       init_rpc_hdr(&p->hdr, DCERPC_PKT_BIND_ACK, DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST,
                        p->hdr.call_id,
                        RPC_HEADER_LEN + prs_offset(&out_hdr_ba) + prs_offset(&out_auth),
                        auth_len);
@@ -1914,7 +1930,7 @@ bool api_pipe_alter_context(pipes_struct *p, prs_struct *rpc_in_p)
                 * response in place of the NTLMSSP auth3 type.
                 */
 
-               if (auth_info.auth_type == RPC_SPNEGO_AUTH_TYPE) {
+               if (auth_info.auth_type == DCERPC_AUTH_TYPE_SPNEGO) {
                        /* We can only finish if the pipe is unbound. */
                        if (!p->pipe_bound) {
                                if (!pipe_spnego_auth_bind_continue(p, rpc_in_p, &auth_info, &out_auth)) {
@@ -1975,7 +1991,7 @@ bool api_pipe_alter_context(pipes_struct *p, prs_struct *rpc_in_p)
                auth_len = prs_offset(&out_auth) - RPC_HDR_AUTH_LEN;
        }
 
-       init_rpc_hdr(&p->hdr, RPC_ALTCONTRESP, RPC_FLG_FIRST | RPC_FLG_LAST,
+       init_rpc_hdr(&p->hdr, DCERPC_PKT_ALTER_RESP, DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST,
                        p->hdr.call_id,
                        RPC_HEADER_LEN + prs_offset(&out_hdr_ba) + prs_offset(&out_auth),
                        auth_len);
@@ -2149,9 +2165,9 @@ bool api_pipe_schannel_process(pipes_struct *p, prs_struct *rpc_in, uint32 *p_ss
        uint32 auth_len;
        uint32 save_offset = prs_offset(rpc_in);
        RPC_HDR_AUTH auth_info;
-       struct NL_AUTH_SIGNATURE schannel_chk;
-       enum ndr_err_code ndr_err;
        DATA_BLOB blob;
+       NTSTATUS status;
+       uint8_t *data;
 
        auth_len = p->hdr.auth_len;
 
@@ -2193,7 +2209,7 @@ bool api_pipe_schannel_process(pipes_struct *p, prs_struct *rpc_in, uint32 *p_ss
                return False;
        }
 
-       if (auth_info.auth_type != RPC_SCHANNEL_AUTH_TYPE) {
+       if (auth_info.auth_type != DCERPC_AUTH_TYPE_SCHANNEL) {
                DEBUG(0,("Invalid auth info %d on schannel\n",
                         auth_info.auth_type));
                return False;
@@ -2201,25 +2217,37 @@ bool api_pipe_schannel_process(pipes_struct *p, prs_struct *rpc_in, uint32 *p_ss
 
        blob = data_blob_const(prs_data_p(rpc_in) + prs_offset(rpc_in), auth_len);
 
-       ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), NULL, &schannel_chk,
-                              (ndr_pull_flags_fn_t)ndr_pull_NL_AUTH_SIGNATURE);
-       if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
-               DEBUG(0,("failed to pull NL_AUTH_SIGNATURE\n"));
-               dump_data(2, blob.data, blob.length);
-               return false;
-       }
-
        if (DEBUGLEVEL >= 10) {
-               NDR_PRINT_DEBUG(NL_AUTH_SIGNATURE, &schannel_chk);
+               dump_NL_AUTH_SIGNATURE(talloc_tos(), &blob);
+       }
+
+       data = (uint8_t *)prs_data_p(rpc_in)+RPC_HDR_REQ_LEN;
+
+       switch (auth_info.auth_level) {
+       case DCERPC_AUTH_LEVEL_PRIVACY:
+               status = netsec_incoming_packet(p->auth.a_u.schannel_auth,
+                                               talloc_tos(),
+                                               true,
+                                               data,
+                                               data_len,
+                                               &blob);
+               break;
+       case DCERPC_AUTH_LEVEL_INTEGRITY:
+               status = netsec_incoming_packet(p->auth.a_u.schannel_auth,
+                                               talloc_tos(),
+                                               false,
+                                               data,
+                                               data_len,
+                                               &blob);
+               break;
+       default:
+               status = NT_STATUS_INTERNAL_ERROR;
+               break;
        }
 
-       if (!schannel_decode(p->auth.a_u.schannel_auth,
-                          p->auth.auth_level,
-                          SENDER_IS_INITIATOR,
-                          &schannel_chk,
-                          prs_data_p(rpc_in)+RPC_HDR_REQ_LEN, data_len)) {
-               DEBUG(3,("failed to decode PDU\n"));
-               return False;
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(0,("failed to unseal packet: %s\n", nt_errstr(status)));
+               return false;
        }
 
        /*
@@ -2232,9 +2260,6 @@ bool api_pipe_schannel_process(pipes_struct *p, prs_struct *rpc_in, uint32 *p_ss
                return False;
        }
 
-       /* The sequence number gets incremented on both send and receive. */
-       p->auth.a_u.schannel_auth->seq_num++;
-
        /*
         * Remember the padding length. We must remove it from the real data
         * stream once the sign/seal is done.