diff options
| -rw-r--r-- | source3/Makefile.in | 3 | ||||
| -rw-r--r-- | source3/rpc_server/dcesrv_gssapi.c | 248 | ||||
| -rw-r--r-- | source3/rpc_server/dcesrv_gssapi.h | 42 |
3 files changed, 292 insertions, 1 deletions
diff --git a/source3/Makefile.in b/source3/Makefile.in index ed5aaf225c..8820af14f2 100644 --- a/source3/Makefile.in +++ b/source3/Makefile.in @@ -712,7 +712,8 @@ RPC_NCACN_NP = rpc_server/srv_pipe_register.o rpc_server/rpc_ncacn_np.o \ RPC_SERVICE = rpc_server/rpc_server.o -RPC_CRYPTO = rpc_server/dcesrv_ntlmssp.o +RPC_CRYPTO = rpc_server/dcesrv_ntlmssp.o \ + rpc_server/dcesrv_gssapi.o RPC_PIPE_OBJ = rpc_server/srv_pipe.o rpc_server/srv_pipe_hnd.o \ $(RPC_NCACN_NP) $(RPC_SERVICE) $(RPC_CRYPTO) diff --git a/source3/rpc_server/dcesrv_gssapi.c b/source3/rpc_server/dcesrv_gssapi.c new file mode 100644 index 0000000000..60cfca9b86 --- /dev/null +++ b/source3/rpc_server/dcesrv_gssapi.c @@ -0,0 +1,248 @@ +/* + * GSSAPI Acceptor + * DCERPC Server functions + * Copyright (C) Simo Sorce 2010. + * + * 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 3 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, see <http://www.gnu.org/licenses/>. + */ + + +#include "includes.h" +#include "rpc_server/dcesrv_gssapi.h" +#include "../librpc/gen_ndr/ndr_krb5pac.h" +#include "librpc/crypto/gse.h" + +NTSTATUS gssapi_server_auth_start(TALLOC_CTX *mem_ctx, + bool do_sign, + bool do_seal, + bool is_dcerpc, + DATA_BLOB *token_in, + DATA_BLOB *token_out, + struct gse_context **ctx) +{ + struct gse_context *gse_ctx = NULL; + uint32_t add_flags = 0; + NTSTATUS status; + + if (is_dcerpc) { + add_flags = GSS_C_DCE_STYLE; + } + + /* Let's init the gssapi machinery for this connection */ + /* passing a NULL server name means the server will try + * to accept any connection regardless of the name used as + * long as it can find a decryption key */ + /* by passing NULL, the code will attempt to set a default + * keytab based on configuration options */ + status = gse_init_server(mem_ctx, do_sign, do_seal, + add_flags, NULL, &gse_ctx); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0, ("Failed to init dcerpc gssapi server (%s)\n", + nt_errstr(status))); + return status; + } + + status = gse_get_server_auth_token(mem_ctx, gse_ctx, + token_in, token_out); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0, ("Failed to parse initial client token (%s)\n", + nt_errstr(status))); + goto done; + } + + *ctx = gse_ctx; + status = NT_STATUS_OK; + +done: + if (!NT_STATUS_IS_OK(status)) { + TALLOC_FREE(gse_ctx); + } + + return status; +} + +NTSTATUS gssapi_server_step(struct gse_context *gse_ctx, + TALLOC_CTX *mem_ctx, + DATA_BLOB *token_in, + DATA_BLOB *token_out) +{ + NTSTATUS status; + + status = gse_get_server_auth_token(mem_ctx, gse_ctx, + token_in, token_out); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + if (gse_require_more_processing(gse_ctx)) { + /* ask for next leg */ + return NT_STATUS_MORE_PROCESSING_REQUIRED; + } + + return NT_STATUS_OK; +} + +NTSTATUS gssapi_server_check_flags(struct gse_context *gse_ctx) +{ + return gse_verify_server_auth_flags(gse_ctx); +} + +NTSTATUS gssapi_server_get_user_info(struct gse_context *gse_ctx, + TALLOC_CTX *mem_ctx, + struct client_address *client_id, + struct auth_serversupplied_info **server_info) +{ + TALLOC_CTX *tmp_ctx; + DATA_BLOB auth_data; + time_t tgs_authtime; + NTTIME tgs_authtime_nttime; + DATA_BLOB pac; + struct PAC_DATA *pac_data; + struct PAC_LOGON_NAME *logon_name = NULL; + struct PAC_LOGON_INFO *logon_info = NULL; + enum ndr_err_code ndr_err; + unsigned int i; + bool is_mapped; + bool is_guest; + char *princ_name; + char *ntuser; + char *ntdomain; + char *username; + struct passwd *pw; + NTSTATUS status; + bool bret; + + tmp_ctx = talloc_new(mem_ctx); + if (!tmp_ctx) { + return NT_STATUS_NO_MEMORY; + } + + status = gse_get_authz_data(gse_ctx, tmp_ctx, &auth_data); + if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) { + /* TODO: Fetch user by principal name ? */ + status = NT_STATUS_ACCESS_DENIED; + goto done; + } + if (!NT_STATUS_IS_OK(status)) { + goto done; + } + + bret = unwrap_pac(tmp_ctx, &auth_data, &pac); + if (!bret) { + DEBUG(1, ("Failed to unwrap PAC\n")); + status = NT_STATUS_ACCESS_DENIED; + goto done; + } + + status = gse_get_client_name(gse_ctx, tmp_ctx, &princ_name); + if (!NT_STATUS_IS_OK(status)) { + goto done; + } + + status = gse_get_authtime(gse_ctx, &tgs_authtime); + if (!NT_STATUS_IS_OK(status)) { + goto done; + } + unix_to_nt_time(&tgs_authtime_nttime, tgs_authtime); + + pac_data = talloc_zero(tmp_ctx, struct PAC_DATA); + if (!pac_data) { + status = NT_STATUS_NO_MEMORY; + goto done; + } + + ndr_err = ndr_pull_struct_blob(&pac, pac_data, pac_data, + (ndr_pull_flags_fn_t)ndr_pull_PAC_DATA); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + DEBUG(1, ("Failed to parse the PAC for %s\n", princ_name)); + status = ndr_map_error2ntstatus(ndr_err); + goto done; + } + + /* get logon name and logon info */ + for (i = 0; i < pac_data->num_buffers; i++) { + struct PAC_BUFFER *data_buf = &pac_data->buffers[i]; + + switch (data_buf->type) { + case PAC_TYPE_LOGON_INFO: + if (!data_buf->info) { + break; + } + logon_info = data_buf->info->logon_info.info; + break; + case PAC_TYPE_LOGON_NAME: + logon_name = &data_buf->info->logon_name; + break; + default: + break; + } + } + if (!logon_info) { + DEBUG(1, ("Invalid PAC data, missing logon info!\n")); + status = NT_STATUS_NOT_FOUND; + goto done; + } + if (!logon_name) { + DEBUG(1, ("Invalid PAC data, missing logon info!\n")); + status = NT_STATUS_NOT_FOUND; + goto done; + } + + /* check time */ + if (tgs_authtime_nttime != logon_name->logon_time) { + DEBUG(1, ("Logon time mismatch between ticket and PAC!\n" + "PAC Time = %s | Ticket Time = %s\n", + nt_time_string(tmp_ctx, logon_name->logon_time), + nt_time_string(tmp_ctx, tgs_authtime_nttime))); + status = NT_STATUS_ACCESS_DENIED; + goto done; + } + + /* TODO: Should we check princ_name against account_name in + * logon_name ? Are they supposed to be identical, or can an + * account_name be different from the UPN ? */ + + status = get_user_from_kerberos_info(tmp_ctx, client_id->name, + princ_name, logon_info, + &is_mapped, &is_guest, + &ntuser, &ntdomain, + &username, &pw); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(1, ("Failed to map kerberos principal to system user " + "(%s)\n", nt_errstr(status))); + status = NT_STATUS_ACCESS_DENIED; + goto done; + } + + /* TODO: save PAC data in netsamlogon cache ? */ + + status = make_server_info_krb5(mem_ctx, + ntuser, ntdomain, username, pw, + logon_info, is_guest, server_info); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(1, ("Failed to map kerberos pac to server info (%s)\n", + nt_errstr(status))); + status = NT_STATUS_ACCESS_DENIED; + goto done; + } + + DEBUG(5, (__location__ "OK: user: %s domain: %s client: %s\n", + ntuser, ntdomain, client_id->name)); + + status = NT_STATUS_OK; + +done: + TALLOC_FREE(tmp_ctx); + return status; +} diff --git a/source3/rpc_server/dcesrv_gssapi.h b/source3/rpc_server/dcesrv_gssapi.h new file mode 100644 index 0000000000..1b7b6bca4c --- /dev/null +++ b/source3/rpc_server/dcesrv_gssapi.h @@ -0,0 +1,42 @@ +/* + * GSSAPI Acceptor + * DCERPC Server functions + * Copyright (C) Simo Sorce 2010. + * + * 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 3 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, see <http://www.gnu.org/licenses/>. + */ + +#ifndef _DCESRV_GSSAPI_H_ +#define _DCESRV_GSSAPI_H_ + +struct gse_context; + +NTSTATUS gssapi_server_auth_start(TALLOC_CTX *mem_ctx, + bool do_sign, + bool do_seal, + bool is_dcerpc, + DATA_BLOB *token_in, + DATA_BLOB *token_out, + struct gse_context **ctx); +NTSTATUS gssapi_server_step(struct gse_context *gse_ctx, + TALLOC_CTX *mem_ctx, + DATA_BLOB *token_in, + DATA_BLOB *token_out); +NTSTATUS gssapi_server_check_flags(struct gse_context *gse_ctx); +NTSTATUS gssapi_server_get_user_info(struct gse_context *gse_ctx, + TALLOC_CTX *mem_ctx, + struct client_address *client_id, + struct auth_serversupplied_info **server_info); + +#endif /* _DCESRV_GSSAPI_H_ */ |