/* Unix SMB/CIFS implementation. Winbind status program. Copyright (C) Tim Potter 2000-2003 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2004 Copyright (C) Francesco Chemolli <kinkie@kame.usr.dsi.unimi.it> 2000 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 "system/filesys.h" #include "lib/cmdline/popt_common.h" #include "lib/ldb/include/ldb.h" #include "auth/credentials/credentials.h" #include "auth/gensec/gensec.h" #include "auth/auth.h" #include "librpc/gen_ndr/ndr_netlogon.h" #include "auth/auth_sam.h" #include "pstring.h" #include "libcli/auth/libcli_auth.h" #include "libcli/security/security.h" #include "lib/events/events.h" #include "lib/messaging/messaging.h" #include "lib/messaging/irpc.h" #include "auth/ntlmssp/ntlmssp.h" #include "param/param.h" #define INITIAL_BUFFER_SIZE 300 #define MAX_BUFFER_SIZE 63000 enum stdio_helper_mode { SQUID_2_4_BASIC, SQUID_2_5_BASIC, SQUID_2_5_NTLMSSP, NTLMSSP_CLIENT_1, GSS_SPNEGO_CLIENT, GSS_SPNEGO_SERVER, NTLM_SERVER_1, NUM_HELPER_MODES }; #define NTLM_AUTH_FLAG_USER_SESSION_KEY 0x0004 #define NTLM_AUTH_FLAG_LMKEY 0x0008 typedef void (*stdio_helper_function)(enum stdio_helper_mode stdio_helper_mode, struct loadparm_context *lp_ctx, char *buf, int length, void **private, unsigned int mux_id, void **private2); static void manage_squid_basic_request (enum stdio_helper_mode stdio_helper_mode, struct loadparm_context *lp_ctx, char *buf, int length, void **private, unsigned int mux_id, void **private2); static void manage_gensec_request (enum stdio_helper_mode stdio_helper_mode, struct loadparm_context *lp_ctx, char *buf, int length, void **private, unsigned int mux_id, void **private2); static void manage_ntlm_server_1_request (enum stdio_helper_mode stdio_helper_mode, struct loadparm_context *lp_ctx, char *buf, int length, void **private, unsigned int mux_id, void **private2); static void manage_squid_request(struct loadparm_context *lp_ctx, enum stdio_helper_mode helper_mode, stdio_helper_function fn, void **private2); static const struct { enum stdio_helper_mode mode; const char *name; stdio_helper_function fn; } stdio_helper_protocols[] = { { SQUID_2_4_BASIC, "squid-2.4-basic", manage_squid_basic_request}, { SQUID_2_5_BASIC, "squid-2.5-basic", manage_squid_basic_request}, { SQUID_2_5_NTLMSSP, "squid-2.5-ntlmssp", manage_gensec_request}, { GSS_SPNEGO_CLIENT, "gss-spnego-client", manage_gensec_request}, { GSS_SPNEGO_SERVER, "gss-spnego", manage_gensec_request}, { NTLMSSP_CLIENT_1, "ntlmssp-client-1", manage_gensec_request}, { NTLM_SERVER_1, "ntlm-server-1", manage_ntlm_server_1_request}, { NUM_HELPER_MODES, NULL, NULL} }; extern int winbindd_fd; static const char *opt_username; static const char *opt_domain; static const char *opt_workstation; static const char *opt_password; static int opt_multiplex; static int use_cached_creds; static void mux_printf(unsigned int mux_id, const char *format, ...) PRINTF_ATTRIBUTE(2, 3); static void mux_printf(unsigned int mux_id, const char *format, ...) { va_list ap; if (opt_multiplex) { x_fprintf(x_stdout, "%d ", mux_id); } va_start(ap, format); x_vfprintf(x_stdout, format, ap); va_end(ap); } /* Copy of parse_domain_user from winbindd_util.c. Parse a string of the form DOMAIN/user into a domain and a user */ static bool parse_ntlm_auth_domain_user(const char *domuser, fstring domain, fstring user, char winbind_separator) { char *p = strchr(domuser, winbind_separator); if (!p) { return false; } fstrcpy(user, p+1); fstrcpy(domain, domuser); domain[PTR_DIFF(p, domuser)] = 0; return true; } /** * Decode a base64 string into a DATA_BLOB - simple and slow algorithm **/ static DATA_BLOB base64_decode_data_blob(TALLOC_CTX *mem_ctx, const char *s) { DATA_BLOB ret = data_blob_talloc(mem_ctx, s, strlen(s)+1); ret.length = ldb_base64_decode((char *)ret.data); return ret; } /** * Encode a base64 string into a talloc()ed string caller to free. **/ static char *base64_encode_data_blob(TALLOC_CTX *mem_ctx, DATA_BLOB data) { return ldb_base64_encode(mem_ctx, (const char *)data.data, data.length); } /** * Decode a base64 string in-place - wrapper for the above **/ static void base64_decode_inplace(char *s) { ldb_base64_decode(s); } /* Authenticate a user with a plaintext password */ static bool check_plaintext_auth(const char *user, const char *pass, bool stdout_diagnostics) { return (strcmp(pass, opt_password) == 0); } /* authenticate a user with an encrypted username/password */ static NTSTATUS local_pw_check_specified(struct loadparm_context *lp_ctx, const char *username, const char *domain, const char *workstation, const DATA_BLOB *challenge, const DATA_BLOB *lm_response, const DATA_BLOB *nt_response, uint32_t flags, DATA_BLOB *lm_session_key, DATA_BLOB *user_session_key, char **error_string, char **unix_name) { NTSTATUS nt_status; struct samr_Password lm_pw, nt_pw; struct samr_Password *lm_pwd, *nt_pwd; TALLOC_CTX *mem_ctx = talloc_init("local_pw_check_specified"); if (!mem_ctx) { nt_status = NT_STATUS_NO_MEMORY; } else { E_md4hash(opt_password, nt_pw.hash); if (E_deshash(opt_password, lm_pw.hash)) { lm_pwd = &lm_pw; } else { lm_pwd = NULL; } nt_pwd = &nt_pw; nt_status = ntlm_password_check(mem_ctx, lp_ctx, MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT, challenge, lm_response, nt_response, username, username, domain, lm_pwd, nt_pwd, user_session_key, lm_session_key); if (NT_STATUS_IS_OK(nt_status)) { if (unix_name) { asprintf(unix_name, "%s%c%s", domain, *lp_winbind_separator(lp_ctx), username); } } else { DEBUG(3, ("Login for user [%s]\\[%s]@[%s] failed due to [%s]\n", domain, username, workstation, nt_errstr(nt_status))); } talloc_free(mem_ctx); } if (error_string) { *error_string = strdup(nt_errstr(nt_status)); } return nt_status; } static void manage_squid_basic_request(enum stdio_helper_mode stdio_helper_mode, struct loadparm_context *lp_ctx, char *buf, int length, void **private, unsigned int mux_id, void **private2) { char *user, *pass; user=buf; pass = memchr(buf, ' ', length); if (!pass) { DEBUG(2, ("Password not found. Denying access\n")); mux_printf(mux_id, "ERR\n"); return; } *pass='\0'; pass++; if (stdio_helper_mode == SQUID_2_5_BASIC) { rfc1738_unescape(user); rfc1738_unescape(pass); } if (check_plaintext_auth(user, pass, false)) { mux_printf(mux_id, "OK\n"); } else { mux_printf(mux_id, "ERR\n"); } } /* This is a bit hairy, but the basic idea is to do a password callback to the calling application. The callback comes from within gensec */ static void manage_gensec_get_pw_request(enum stdio_helper_mode stdio_helper_mode, struct loadparm_context *lp_ctx, char *buf, int length, void **private, unsigned int mux_id, void **password) { DATA_BLOB in; if (strlen(buf) < 2) { DEBUG(1, ("query [%s] invalid", buf)); mux_printf(mux_id, "BH\n"); return; } if (strlen(buf) > 3) { in = base64_decode_data_blob(NULL, buf + 3); } else { in = data_blob(NULL, 0); } if (strncmp(buf, "PW ", 3) == 0) { *password = talloc_strndup(*private /* hopefully the right gensec context, useful to use for talloc */, (const char *)in.data, in.length); if (*password == NULL) { DEBUG(1, ("Out of memory\n")); mux_printf(mux_id, "BH\n"); data_blob_free(&in); return; } mux_printf(mux_id, "OK\n"); data_blob_free(&in); return; } DEBUG(1, ("Asked for (and expected) a password\n")); mux_printf(mux_id, "BH\n"); data_blob_free(&in); } /** * Callback for password credentials. This is not async, and when * GENSEC and the credentials code is made async, it will look rather * different. */ static const char *get_password(struct cli_credentials *credentials) { char *password = NULL; /* Ask for a password */ mux_printf((unsigned int)credentials->priv_data, "PW\n"); credentials->priv_data = NULL; manage_squid_request(cmdline_lp_ctx, NUM_HELPER_MODES /* bogus */, manage_gensec_get_pw_request, (void **)&password); return password; } /** Check if a string is part of a list. **/ static bool in_list(const char *s, const char *list, bool casesensitive) { char *tok; size_t tok_len = 1024; const char *p=list; if (!list) return false; tok = (char *)malloc(tok_len); if (!tok) { return false; } while (next_token(&p, tok, LIST_SEP, tok_len)) { if ((casesensitive?strcmp:strcasecmp_m)(tok,s) == 0) { free(tok); return true; } } free(tok); return false; } static void gensec_want_feature_list(struct gensec_security *state, char* feature_list) { if (in_list("NTLMSSP_FEATURE_SESSION_KEY", feature_list, true)) { DEBUG(10, ("want GENSEC_FEATURE_SESSION_KEY\n")); gensec_want_feature(state, GENSEC_FEATURE_SESSION_KEY); } if (in_list("NTLMSSP_FEATURE_SIGN", feature_list, true)) { DEBUG(10, ("want GENSEC_FEATURE_SIGN\n")); gensec_want_feature(state, GENSEC_FEATURE_SIGN); } if (in_list("NTLMSSP_FEATURE_SEAL", feature_list, true)) { DEBUG(10, ("want GENSEC_FEATURE_SEAL\n")); gensec_want_feature(state, GENSEC_FEATURE_SEAL); } } static void manage_gensec_request(enum stdio_helper_mode stdio_helper_mode, struct loadparm_context *lp_ctx, char *buf, int length, void **private, unsigned int mux_id, void **private2) { DATA_BLOB in; DATA_BLOB out = data_blob(NULL, 0); char *out_base64 = NULL; const char *reply_arg = NULL; struct gensec_ntlm_state { struct gensec_security *gensec_state; const char *set_password; }; struct gensec_ntlm_state *state; struct event_context *ev; struct messaging_context *msg; NTSTATUS nt_status; bool first = false; const char *reply_code; struct cli_credentials *creds; static char *want_feature_list = NULL; static DATA_BLOB session_key; TALLOC_CTX *mem_ctx; if (*private) { state = (struct gensec_ntlm_state *)*private; } else { state = talloc_zero(NULL, struct gensec_ntlm_state); if (!state) { mux_printf(mux_id, "BH No Memory\n"); exit(1); } *private = state; if (opt_password) { state->set_password = opt_password; } } if (strlen(buf) < 2) { DEBUG(1, ("query [%s] invalid", buf)); mux_printf(mux_id, "BH\n"); return; } if (strlen(buf) > 3) { if(strncmp(buf, "SF ", 3) == 0) { DEBUG(10, ("Setting flags to negotiate\n")); talloc_free(want_feature_list); want_feature_list = talloc_strndup(state, buf+3, strlen(buf)-3); mux_printf(mux_id, "OK\n"); return; } in = base64_decode_data_blob(NULL, buf + 3); } else { in = data_blob(NULL, 0); } if (strncmp(buf, "YR", 2) == 0) { if (state->gensec_state) { talloc_free(state->gensec_state); state->gensec_state = NULL; } } else if ( (strncmp(buf, "OK", 2) == 0)) { /* Just return BH, like ntlm_auth from Samba 3 does. */ mux_printf(mux_id, "BH\n"); data_blob_free(&in); return; } else if ( (strncmp(buf, "TT ", 3) != 0) && (strncmp(buf, "KK ", 3) != 0) && (strncmp(buf, "AF ", 3) != 0) && (strncmp(buf, "NA ", 3) != 0) && (strncmp(buf, "UG", 2) != 0) && (strncmp(buf, "PW ", 3) != 0) && (strncmp(buf, "GK", 2) != 0) && (strncmp(buf, "GF", 2) != 0)) { DEBUG(1, ("SPNEGO request [%s] invalid\n", buf)); mux_printf(mux_id, "BH\n"); data_blob_free(&in); return; } /* setup gensec */ if (!(state->gensec_state)) { switch (stdio_helper_mode) { case GSS_SPNEGO_CLIENT: case NTLMSSP_CLIENT_1: /* setup the client side */ nt_status = gensec_client_start(NULL, &state->gensec_state, NULL, lp_ctx); if (!NT_STATUS_IS_OK(nt_status)) { exit(1); } break; case GSS_SPNEGO_SERVER: case SQUID_2_5_NTLMSSP: ev = event_context_init(state); if (!ev) { exit(1); } msg = messaging_client_init(state, lp_messaging_path(state, lp_ctx), lp_iconv_convenience(lp_ctx), ev); if (!msg) { exit(1); } if (!NT_STATUS_IS_OK(gensec_server_start(state, ev, lp_ctx, msg, &state->gensec_state))) { exit(1); } break; default: abort(); } creds = cli_credentials_init(state->gensec_state); cli_credentials_set_conf(creds, lp_ctx); if (opt_username) { cli_credentials_set_username(creds, opt_username, CRED_SPECIFIED); } if (opt_domain) { cli_credentials_set_domain(creds, opt_domain, CRED_SPECIFIED); } if (state->set_password) { cli_credentials_set_password(creds, state->set_password, CRED_SPECIFIED); } else { cli_credentials_set_password_callback(creds, get_password); creds->priv_data = (void*)mux_id; } if (opt_workstation) { cli_credentials_set_workstation(creds, opt_workstation, CRED_SPECIFIED); } switch (stdio_helper_mode) { case GSS_SPNEGO_SERVER: case SQUID_2_5_NTLMSSP: cli_credentials_set_machine_account(creds, lp_ctx); break; default: break; } gensec_set_credentials(state->gensec_state, creds); gensec_want_feature_list(state->gensec_state, want_feature_list); switch (stdio_helper_mode) { case GSS_SPNEGO_CLIENT: case GSS_SPNEGO_SERVER: nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_SPNEGO); if (!in.length) { first = true; } break; case NTLMSSP_CLIENT_1: if (!in.length) { first = true; } /* fall through */ case SQUID_2_5_NTLMSSP: nt_status = gensec_start_mech_by_oid(state->gensec_state, GENSEC_OID_NTLMSSP); break; default: abort(); } if (!NT_STATUS_IS_OK(nt_status)) { DEBUG(1, ("GENSEC mech failed to start: %s\n", nt_errstr(nt_status))); mux_printf(mux_id, "BH\n"); return; } } /* update */ mem_ctx = talloc_named(NULL, 0, "manage_gensec_request internal mem_ctx"); if (strncmp(buf, "PW ", 3) == 0) { state->set_password = talloc_strndup(state, (const char *)in.data, in.length); cli_credentials_set_password(gensec_get_credentials(state->gensec_state), state->set_password, CRED_SPECIFIED); mux_printf(mux_id, "OK\n"); data_blob_free(&in); talloc_free(mem_ctx); return; } if (strncmp(buf, "UG", 2) == 0) { int i; char *grouplist = NULL; struct auth_session_info *session_info; nt_status = gensec_session_info(state->gensec_state, &session_info); if (!NT_STATUS_IS_OK(nt_status)) { DEBUG(1, ("gensec_session_info failed: %s\n", nt_errstr(nt_status))); mux_printf(mux_id, "BH %s\n", nt_errstr(nt_status)); data_blob_free(&in); talloc_free(mem_ctx); return; } /* get the string onto the context */ grouplist = talloc_strdup(mem_ctx, ""); for (i=0; i<session_info->security_token->num_sids; i++) { struct security_token *token = session_info->security_token; const char *sidstr = dom_sid_string(session_info, token->sids[i]); grouplist = talloc_asprintf_append_buffer(grouplist, "%s,", sidstr); } mux_printf(mux_id, "GL %s\n", grouplist); talloc_free(session_info); data_blob_free(&in); talloc_free(mem_ctx); return; } if (strncmp(buf, "GK", 2) == 0) { char *base64_key; DEBUG(10, ("Requested session key\n")); nt_status = gensec_session_key(state->gensec_state, &session_key); if(!NT_STATUS_IS_OK(nt_status)) { DEBUG(1, ("gensec_session_key failed: %s\n", nt_errstr(nt_status))); mux_printf(mux_id, "BH No session key\n"); talloc_free(mem_ctx); return; } else { base64_key = base64_encode_data_blob(state, session_key); mux_printf(mux_id, "GK %s\n", base64_key); talloc_free(base64_key); } talloc_free(mem_ctx); return; } if (strncmp(buf, "GF", 2) == 0) { struct gensec_ntlmssp_state *gensec_ntlmssp_state; uint32_t neg_flags; gensec_ntlmssp_state = talloc_get_type(state->gensec_state->private_data, struct gensec_ntlmssp_state); neg_flags = gensec_ntlmssp_state->neg_flags; DEBUG(10, ("Requested negotiated feature flags\n")); mux_printf(mux_id, "GF 0x%08x\n", neg_flags); return; } nt_status = gensec_update(state->gensec_state, mem_ctx, in, &out); /* don't leak 'bad password'/'no such user' info to the network client */ nt_status = auth_nt_status_squash(nt_status); if (out.length) { out_base64 = base64_encode_data_blob(mem_ctx, out); } else { out_base64 = NULL; } if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { reply_arg = "*"; if (first) { reply_code = "YR"; } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) { reply_code = "KK"; } else if (state->gensec_state->gensec_role == GENSEC_SERVER) { reply_code = "TT"; } else { abort(); } } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) { reply_code = "BH"; reply_arg = nt_errstr(nt_status); DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status))); } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) { reply_code = "BH"; reply_arg = nt_errstr(nt_status); DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status))); } else if (!NT_STATUS_IS_OK(nt_status)) { reply_code = "NA"; reply_arg = nt_errstr(nt_status); DEBUG(1, ("GENSEC login failed: %s\n", nt_errstr(nt_status))); } else if /* OK */ (state->gensec_state->gensec_role == GENSEC_SERVER) { struct auth_session_info *session_info; nt_status = gensec_session_info(state->gensec_state, &session_info); if (!NT_STATUS_IS_OK(nt_status)) { reply_code = "BH"; reply_arg = nt_errstr(nt_status); DEBUG(1, ("GENSEC failed to retreive the session info: %s\n", nt_errstr(nt_status))); } else { reply_code = "AF"; reply_arg = talloc_asprintf(state->gensec_state, "%s%s%s", session_info->server_info->domain_name, lp_winbind_separator(lp_ctx), session_info->server_info->account_name); talloc_free(session_info); } } else if (state->gensec_state->gensec_role == GENSEC_CLIENT) { reply_code = "AF"; reply_arg = out_base64; } else { abort(); } switch (stdio_helper_mode) { case GSS_SPNEGO_SERVER: mux_printf(mux_id, "%s %s %s\n", reply_code, out_base64 ? out_base64 : "*", reply_arg ? reply_arg : "*"); break; default: if (out_base64) { mux_printf(mux_id, "%s %s\n", reply_code, out_base64); } else if (reply_arg) { mux_printf(mux_id, "%s %s\n", reply_code, reply_arg); } else { mux_printf(mux_id, "%s\n", reply_code); } } talloc_free(mem_ctx); return; } static void manage_ntlm_server_1_request(enum stdio_helper_mode stdio_helper_mode, struct loadparm_context *lp_ctx, char *buf, int length, void **private, unsigned int mux_id, void **private2) { char *request, *parameter; static DATA_BLOB challenge; static DATA_BLOB lm_response; static DATA_BLOB nt_response; static char *full_username; static char *username; static char *domain; static char *plaintext_password; static bool ntlm_server_1_user_session_key; static bool ntlm_server_1_lm_session_key; if (strequal(buf, ".")) { if (!full_username && !username) { mux_printf(mux_id, "Error: No username supplied!\n"); } else if (plaintext_password) { /* handle this request as plaintext */ if (!full_username) { if (asprintf(&full_username, "%s%c%s", domain, *lp_winbind_separator(lp_ctx), username) == -1) { mux_printf(mux_id, "Error: Out of memory in asprintf!\n.\n"); return; } } if (check_plaintext_auth(full_username, plaintext_password, false)) { mux_printf(mux_id, "Authenticated: Yes\n"); } else { mux_printf(mux_id, "Authenticated: No\n"); } } else if (!lm_response.data && !nt_response.data) { mux_printf(mux_id, "Error: No password supplied!\n"); } else if (!challenge.data) { mux_printf(mux_id, "Error: No lanman-challenge supplied!\n"); } else { char *error_string = NULL; DATA_BLOB lm_key; DATA_BLOB user_session_key; uint32_t flags = 0; if (full_username && !username) { fstring fstr_user; fstring fstr_domain; if (!parse_ntlm_auth_domain_user(full_username, fstr_user, fstr_domain, *lp_winbind_separator(lp_ctx))) { /* username might be 'tainted', don't print into our new-line deleimianted stream */ mux_printf(mux_id, "Error: Could not parse into domain and username\n"); } SAFE_FREE(username); SAFE_FREE(domain); username = smb_xstrdup(fstr_user); domain = smb_xstrdup(fstr_domain); } if (!domain) { domain = smb_xstrdup(lp_workgroup(lp_ctx)); } if (ntlm_server_1_lm_session_key) flags |= NTLM_AUTH_FLAG_LMKEY; if (ntlm_server_1_user_session_key) flags |= NTLM_AUTH_FLAG_USER_SESSION_KEY; if (!NT_STATUS_IS_OK( local_pw_check_specified(lp_ctx, username, domain, lp_netbios_name(lp_ctx), &challenge, &lm_response, &nt_response, flags, &lm_key, &user_session_key, &error_string, NULL))) { mux_printf(mux_id, "Authenticated: No\n"); mux_printf(mux_id, "Authentication-Error: %s\n.\n", error_string); SAFE_FREE(error_string); } else { static char zeros[16]; char *hex_lm_key; char *hex_user_session_key; mux_printf(mux_id, "Authenticated: Yes\n"); if (ntlm_server_1_lm_session_key && lm_key.length && (memcmp(zeros, lm_key.data, lm_key.length) != 0)) { hex_encode(lm_key.data, lm_key.length, &hex_lm_key); mux_printf(mux_id, "LANMAN-Session-Key: %s\n", hex_lm_key); SAFE_FREE(hex_lm_key); } if (ntlm_server_1_user_session_key && user_session_key.length && (memcmp(zeros, user_session_key.data, user_session_key.length) != 0)) { hex_encode(user_session_key.data, user_session_key.length, &hex_user_session_key); mux_printf(mux_id, "User-Session-Key: %s\n", hex_user_session_key); SAFE_FREE(hex_user_session_key); } } } /* clear out the state */ challenge = data_blob(NULL, 0); nt_response = data_blob(NULL, 0); lm_response = data_blob(NULL, 0); SAFE_FREE(full_username); SAFE_FREE(username); SAFE_FREE(domain); SAFE_FREE(plaintext_password); ntlm_server_1_user_session_key = false; ntlm_server_1_lm_session_key = false; mux_printf(mux_id, ".\n"); return; } request = buf; /* Indicates a base64 encoded structure */ parameter = strstr(request, ":: "); if (!parameter) { parameter = strstr(request, ": "); if (!parameter) { DEBUG(0, ("Parameter not found!\n")); mux_printf(mux_id, "Error: Parameter not found!\n.\n"); return; } parameter[0] ='\0'; parameter++; parameter[0] ='\0'; parameter++; } else { parameter[0] ='\0'; parameter++; parameter[0] ='\0'; parameter++; parameter[0] ='\0'; parameter++; base64_decode_inplace(parameter); } if (strequal(request, "LANMAN-Challenge")) { challenge = strhex_to_data_blob(parameter); if (challenge.length != 8) { mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 8)\n.\n", parameter, (int)challenge.length); challenge = data_blob(NULL, 0); } } else if (strequal(request, "NT-Response")) { nt_response = strhex_to_data_blob(parameter); if (nt_response.length < 24) { mux_printf(mux_id, "Error: hex decode of %s failed! (only got %d bytes, needed at least 24)\n.\n", parameter, (int)nt_response.length); nt_response = data_blob(NULL, 0); } } else if (strequal(request, "LANMAN-Response")) { lm_response = strhex_to_data_blob(parameter); if (lm_response.length != 24) { mux_printf(mux_id, "Error: hex decode of %s failed! (got %d bytes, expected 24)\n.\n", parameter, (int)lm_response.length); lm_response = data_blob(NULL, 0); } } else if (strequal(request, "Password")) { plaintext_password = smb_xstrdup(parameter); } else if (strequal(request, "NT-Domain")) { domain = smb_xstrdup(parameter); } else if (strequal(request, "Username")) { username = smb_xstrdup(parameter); } else if (strequal(request, "Full-Username")) { full_username = smb_xstrdup(parameter); } else if (strequal(request, "Request-User-Session-Key")) { ntlm_server_1_user_session_key = strequal(parameter, "Yes"); } else if (strequal(request, "Request-LanMan-Session-Key")) { ntlm_server_1_lm_session_key = strequal(parameter, "Yes"); } else { mux_printf(mux_id, "Error: Unknown request %s\n.\n", request); } } static void manage_squid_request(struct loadparm_context *lp_ctx, enum stdio_helper_mode helper_mode, stdio_helper_function fn, void **private2) { char *buf; char tmp[INITIAL_BUFFER_SIZE+1]; unsigned int mux_id = 0; int length, buf_size = 0; char *c; struct mux_private { unsigned int max_mux; void **private_pointers; }; static struct mux_private *mux_private; static void *normal_private; void **private; buf = talloc_strdup(NULL, ""); if (buf == NULL) { DEBUG(0, ("Failed to allocate memory for reading the input " "buffer.\n")); x_fprintf(x_stdout, "ERR\n"); return; } do { /* this is not a typo - x_fgets doesn't work too well under * squid */ if (fgets(tmp, INITIAL_BUFFER_SIZE, stdin) == NULL) { if (ferror(stdin)) { DEBUG(1, ("fgets() failed! dying..... errno=%d " "(%s)\n", ferror(stdin), strerror(ferror(stdin)))); exit(1); /* BIIG buffer */ } exit(0); } buf = talloc_strdup_append_buffer(buf, tmp); buf_size += INITIAL_BUFFER_SIZE; if (buf_size > MAX_BUFFER_SIZE) { DEBUG(0, ("Invalid Request (too large)\n")); x_fprintf(x_stdout, "ERR\n"); talloc_free(buf); return; } c = strchr(buf, '\n'); } while (c == NULL); *c = '\0'; length = c-buf; DEBUG(10, ("Got '%s' from squid (length: %d).\n",buf,length)); if (buf[0] == '\0') { DEBUG(0, ("Invalid Request (empty)\n")); x_fprintf(x_stdout, "ERR\n"); talloc_free(buf); return; } if (opt_multiplex) { if (sscanf(buf, "%u ", &mux_id) != 1) { DEBUG(0, ("Invalid Request - no multiplex id\n")); x_fprintf(x_stdout, "ERR\n"); talloc_free(buf); return; } if (!mux_private) { mux_private = talloc(NULL, struct mux_private); mux_private->max_mux = 0; mux_private->private_pointers = NULL; } c=strchr(buf,' '); if (!c) { DEBUG(0, ("Invalid Request - no data after multiplex id\n")); x_fprintf(x_stdout, "ERR\n"); talloc_free(buf); return; } c++; if (mux_id >= mux_private->max_mux) { unsigned int prev_max = mux_private->max_mux; mux_private->max_mux = mux_id + 1; mux_private->private_pointers = talloc_realloc(mux_private, mux_private->private_pointers, void *, mux_private->max_mux); memset(&mux_private->private_pointers[prev_max], '\0', (sizeof(*mux_private->private_pointers) * (mux_private->max_mux - prev_max))); }; private = &mux_private->private_pointers[mux_id]; } else { c = buf; private = &normal_private; } fn(helper_mode, lp_ctx, c, length, private, mux_id, private2); talloc_free(buf); } static void squid_stream(struct loadparm_context *lp_ctx, enum stdio_helper_mode stdio_mode, stdio_helper_function fn) { /* initialize FDescs */ x_setbuf(x_stdout, NULL); x_setbuf(x_stderr, NULL); while(1) { manage_squid_request(lp_ctx, stdio_mode, fn, NULL); } } /* Main program */ enum { OPT_USERNAME = 1000, OPT_DOMAIN, OPT_WORKSTATION, OPT_CHALLENGE, OPT_RESPONSE, OPT_LM, OPT_NT, OPT_PASSWORD, OPT_LM_KEY, OPT_USER_SESSION_KEY, OPT_DIAGNOSTICS, OPT_REQUIRE_MEMBERSHIP, OPT_MULTIPLEX, OPT_USE_CACHED_CREDS, }; int main(int argc, const char **argv) { static const char *helper_protocol; int opt; poptContext pc; /* NOTE: DO NOT change this interface without considering the implications! This is an external interface, which other programs will use to interact with this helper. */ /* We do not use single-letter command abbreviations, because they harm future interface stability. */ struct poptOption long_options[] = { POPT_AUTOHELP { "helper-protocol", 0, POPT_ARG_STRING, &helper_protocol, OPT_DOMAIN, "operate as a stdio-based helper", "helper protocol to use"}, { "domain", 0, POPT_ARG_STRING, &opt_domain, OPT_DOMAIN, "domain name"}, { "workstation", 0, POPT_ARG_STRING, &opt_workstation, OPT_WORKSTATION, "workstation"}, { "username", 0, POPT_ARG_STRING, &opt_username, OPT_PASSWORD, "Username"}, { "password", 0, POPT_ARG_STRING, &opt_password, OPT_PASSWORD, "User's plaintext password"}, { "multiplex", 0, POPT_ARG_NONE, &opt_multiplex, OPT_MULTIPLEX, "Multiplex Mode"}, { "use-cached-creds", 0, POPT_ARG_NONE, &use_cached_creds, OPT_USE_CACHED_CREDS, "silently ignored for compatibility reasons"}, POPT_COMMON_SAMBA POPT_COMMON_VERSION { NULL } }; /* Samba client initialisation */ setup_logging(NULL, DEBUG_STDERR); /* Parse options */ pc = poptGetContext("ntlm_auth", argc, argv, long_options, 0); /* Parse command line options */ if (argc == 1) { poptPrintHelp(pc, stderr, 0); return 1; } pc = poptGetContext(NULL, argc, (const char **)argv, long_options, POPT_CONTEXT_KEEP_FIRST); while((opt = poptGetNextOpt(pc)) != -1) { if (opt < -1) { break; } } if (opt < -1) { fprintf(stderr, "%s: %s\n", poptBadOption(pc, POPT_BADOPTION_NOALIAS), poptStrerror(opt)); return 1; } gensec_init(cmdline_lp_ctx); if (opt_domain == NULL) { opt_domain = lp_workgroup(cmdline_lp_ctx); } if (helper_protocol) { int i; for (i=0; i<NUM_HELPER_MODES; i++) { if (strcmp(helper_protocol, stdio_helper_protocols[i].name) == 0) { squid_stream(cmdline_lp_ctx, stdio_helper_protocols[i].mode, stdio_helper_protocols[i].fn); exit(0); } } x_fprintf(x_stderr, "unknown helper protocol [%s]\n\nValid helper protools:\n\n", helper_protocol); for (i=0; i<NUM_HELPER_MODES; i++) { x_fprintf(x_stderr, "%s\n", stdio_helper_protocols[i].name); } exit(1); } if (!opt_username) { x_fprintf(x_stderr, "username must be specified!\n\n"); poptPrintHelp(pc, stderr, 0); exit(1); } if (opt_workstation == NULL) { opt_workstation = lp_netbios_name(cmdline_lp_ctx); } if (!opt_password) { opt_password = getpass("password: "); } { char *user; asprintf(&user, "%s%c%s", opt_domain, *lp_winbind_separator(cmdline_lp_ctx), opt_username); if (!check_plaintext_auth(user, opt_password, true)) { return 1; } } /* Exit code */ poptFreeContext(pc); return 0; }