/* -*- mode: c; indent-tabs-mode: nil -*- */ /* * Copyright 2000, 2002, 2003, 2007, 2008 by the Massachusetts Institute of Technology. * All Rights Reserved. * * Export of this software from the United States of America may * require a specific license from the United States Government. * It is the responsibility of any person or organization contemplating * export to obtain such a license before exporting. * * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and * distribute this software and its documentation for any purpose and * without fee is hereby granted, provided that the above copyright * notice appear in all copies and that both that copyright notice and * this permission notice appear in supporting documentation, and that * the name of M.I.T. not be used in advertising or publicity pertaining * to distribution of the software without specific, written prior * permission. Furthermore if you modify this software you must label * your software as modified software and not distribute it in such a * fashion that it might be confused with the original M.I.T. software. * M.I.T. makes no representations about the suitability of * this software for any purpose. It is provided "as is" without express * or implied warranty. * */ /* * Copyright 1993 by OpenVision Technologies, Inc. * * Permission to use, copy, modify, distribute, and sell this software * and its documentation for any purpose is hereby granted without fee, * provided that the above copyright notice appears in all copies and * that both that copyright notice and this permission notice appear in * supporting documentation, and that the name of OpenVision not be used * in advertising or publicity pertaining to distribution of the software * without specific, written prior permission. OpenVision makes no * representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied warranty. * * OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ /* * Copyright (C) 1998 by the FundsXpress, INC. * * All rights reserved. * * Export of this software from the United States of America may require * a specific license from the United States Government. It is the * responsibility of any person or organization contemplating export to * obtain such a license before exporting. * * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and * distribute this software and its documentation for any purpose and * without fee is hereby granted, provided that the above copyright * notice appear in all copies and that both that copyright notice and * this permission notice appear in supporting documentation, and that * the name of FundsXpress. not be used in advertising or publicity pertaining * to distribution of the software without specific, written prior * permission. FundsXpress makes no representations about the suitability of * this software for any purpose. It is provided "as is" without express * or implied warranty. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ /* * Copyright (c) 2006-2008, Novell, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * The copyright holder's name is not used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include "k5-int.h" #include "gssapiP_krb5.h" #ifdef HAVE_MEMORY_H #include #endif #include #include /* * $Id$ */ /* XXX This is for debugging only!!! Should become a real bitfield at some point */ int krb5_gss_dbg_client_expcreds = 0; /* * Common code which fetches the correct krb5 credentials from the * ccache. */ static krb5_error_code get_credentials(context, cred, server, now, endtime, out_creds) krb5_context context; krb5_gss_cred_id_t cred; krb5_principal server; krb5_timestamp now; krb5_timestamp endtime; krb5_creds **out_creds; { krb5_error_code code; krb5_creds in_creds; k5_mutex_assert_locked(&cred->lock); memset((char *) &in_creds, 0, sizeof(krb5_creds)); if ((code = krb5_copy_principal(context, cred->princ, &in_creds.client))) goto cleanup; if ((code = krb5_copy_principal(context, server, &in_creds.server))) goto cleanup; in_creds.times.endtime = endtime; in_creds.keyblock.enctype = 0; code = krb5_get_credentials(context, 0, cred->ccache, &in_creds, out_creds); if (code) goto cleanup; /* * Enforce a stricter limit (without timeskew forgiveness at the * boundaries) because accept_sec_context code is also similarly * non-forgiving. */ if (!krb5_gss_dbg_client_expcreds && *out_creds != NULL && (*out_creds)->times.endtime < now) { code = KRB5KRB_AP_ERR_TKT_EXPIRED; goto cleanup; } cleanup: if (in_creds.client) krb5_free_principal(context, in_creds.client); if (in_creds.server) krb5_free_principal(context, in_creds.server); return code; } struct gss_checksum_data { krb5_gss_ctx_id_rec *ctx; krb5_gss_cred_id_t cred; krb5_checksum md5; krb5_data checksum_data; }; #ifdef CFX_EXERCISE #include "../../krb5/krb/auth_con.h" #endif static krb5_error_code KRB5_CALLCONV make_gss_checksum (krb5_context context, krb5_auth_context auth_context, void *cksum_data, krb5_data **out) { krb5_error_code code; krb5_int32 con_flags; unsigned char *ptr; struct gss_checksum_data *data = cksum_data; krb5_data credmsg; unsigned int junk; data->checksum_data.data = 0; credmsg.data = 0; /* build the checksum field */ if (data->ctx->gss_flags & GSS_C_DELEG_FLAG) { /* first get KRB_CRED message, so we know its length */ /* clear the time check flag that was set in krb5_auth_con_init() */ krb5_auth_con_getflags(context, auth_context, &con_flags); krb5_auth_con_setflags(context, auth_context, con_flags & ~KRB5_AUTH_CONTEXT_DO_TIME); code = krb5_fwd_tgt_creds(context, auth_context, 0, data->cred->princ, data->ctx->there, data->cred->ccache, 1, &credmsg); /* turn KRB5_AUTH_CONTEXT_DO_TIME back on */ krb5_auth_con_setflags(context, auth_context, con_flags); if (code) { /* don't fail here; just don't accept/do the delegation request */ data->ctx->gss_flags &= ~GSS_C_DELEG_FLAG; data->checksum_data.length = 24; } else { if (credmsg.length+28 > KRB5_INT16_MAX) { krb5_free_data_contents(context, &credmsg); return(KRB5KRB_ERR_FIELD_TOOLONG); } data->checksum_data.length = 28+credmsg.length; } } else { data->checksum_data.length = 24; } #ifdef CFX_EXERCISE if (data->ctx->auth_context->keyblock != NULL && data->ctx->auth_context->keyblock->enctype == 18) { srand(time(0) ^ getpid()); /* Our ftp client code stupidly assumes a base64-encoded version of the token will fit in 10K, so don't make this too big. */ junk = rand() & 0xff; } else junk = 0; #else junk = 0; #endif data->checksum_data.length += junk; /* now allocate a buffer to hold the checksum data and (maybe) KRB_CRED msg */ if ((data->checksum_data.data = (char *) xmalloc(data->checksum_data.length)) == NULL) { if (credmsg.data) krb5_free_data_contents(context, &credmsg); return(ENOMEM); } ptr = (unsigned char *)data->checksum_data.data; TWRITE_INT(ptr, data->md5.length, 0); TWRITE_STR(ptr, (unsigned char *) data->md5.contents, data->md5.length); TWRITE_INT(ptr, data->ctx->gss_flags, 0); /* done with this, free it */ xfree(data->md5.contents); if (credmsg.data) { TWRITE_INT16(ptr, KRB5_GSS_FOR_CREDS_OPTION, 0); TWRITE_INT16(ptr, credmsg.length, 0); TWRITE_STR(ptr, (unsigned char *) credmsg.data, credmsg.length); /* free credmsg data */ krb5_free_data_contents(context, &credmsg); } if (junk) memset(ptr, 'i', junk); *out = &data->checksum_data; return 0; } static krb5_error_code make_ap_req_v1(context, ctx, cred, k_cred, chan_bindings, mech_type, token) krb5_context context; krb5_gss_ctx_id_rec *ctx; krb5_gss_cred_id_t cred; krb5_creds *k_cred; gss_channel_bindings_t chan_bindings; gss_OID mech_type; gss_buffer_t token; { krb5_flags mk_req_flags = 0; krb5_error_code code; struct gss_checksum_data cksum_struct; krb5_checksum md5; krb5_data ap_req; krb5_data *checksum_data = NULL; unsigned char *ptr; unsigned char *t; unsigned int tlen; k5_mutex_assert_locked(&cred->lock); ap_req.data = 0; /* compute the hash of the channel bindings */ if ((code = kg_checksum_channel_bindings(context, chan_bindings, &md5, 0))) return(code); krb5_auth_con_set_req_cksumtype(context, ctx->auth_context, CKSUMTYPE_KG_CB); cksum_struct.md5 = md5; cksum_struct.ctx = ctx; cksum_struct.cred = cred; cksum_struct.checksum_data.data = NULL; switch (k_cred->keyblock.enctype) { case ENCTYPE_DES_CBC_CRC: case ENCTYPE_DES_CBC_MD4: case ENCTYPE_DES_CBC_MD5: case ENCTYPE_DES3_CBC_SHA1: code = make_gss_checksum(context, ctx->auth_context, &cksum_struct, &checksum_data); if (code) goto cleanup; break; default: krb5_auth_con_set_checksum_func(context, ctx->auth_context, make_gss_checksum, &cksum_struct); break; } /* call mk_req. subkey and ap_req need to be used or destroyed */ mk_req_flags = AP_OPTS_USE_SUBKEY; if (ctx->gss_flags & GSS_C_MUTUAL_FLAG) mk_req_flags |= AP_OPTS_MUTUAL_REQUIRED | AP_OPTS_ETYPE_NEGOTIATION; code = krb5_mk_req_extended(context, &ctx->auth_context, mk_req_flags, checksum_data, k_cred, &ap_req); krb5_free_data_contents(context, &cksum_struct.checksum_data); if (code) goto cleanup; /* store the interesting stuff from creds and authent */ ctx->krb_times = k_cred->times; ctx->krb_flags = k_cred->ticket_flags; /* build up the token */ if (ctx->gss_flags & GSS_C_DCE_STYLE) { /* * For DCE RPC, do not encapsulate the AP-REQ in the * typical GSS wrapping. */ token->length = ap_req.length; token->value = ap_req.data; ap_req.data = NULL; /* don't double free */ } else { /* allocate space for the token */ tlen = g_token_size((gss_OID) mech_type, ap_req.length); if ((t = (unsigned char *) xmalloc(tlen)) == NULL) { code = ENOMEM; goto cleanup; } /* fill in the buffer */ ptr = t; g_make_token_header(mech_type, ap_req.length, &ptr, KG_TOK_CTX_AP_REQ); TWRITE_STR(ptr, (unsigned char *) ap_req.data, ap_req.length); /* pass it back */ token->length = tlen; token->value = (void *) t; } code = 0; cleanup: if (checksum_data && checksum_data->data) krb5_free_data_contents(context, checksum_data); if (ap_req.data) krb5_free_data_contents(context, &ap_req); return (code); } /* * new_connection * * Do the grunt work of setting up a new context. */ static OM_uint32 new_connection( OM_uint32 *minor_status, krb5_gss_cred_id_t cred, gss_ctx_id_t *context_handle, gss_name_t target_name, gss_OID mech_type, OM_uint32 req_flags, OM_uint32 time_req, gss_channel_bindings_t input_chan_bindings, gss_buffer_t input_token, gss_OID *actual_mech_type, gss_buffer_t output_token, OM_uint32 *ret_flags, OM_uint32 *time_rec, krb5_context context, int default_mech) { OM_uint32 major_status; krb5_error_code code; krb5_creds *k_cred; krb5_gss_ctx_id_rec *ctx, *ctx_free; krb5_timestamp now; gss_buffer_desc token; k5_mutex_assert_locked(&cred->lock); major_status = GSS_S_FAILURE; token.length = 0; token.value = NULL; /* make sure the cred is usable for init */ if ((cred->usage != GSS_C_INITIATE) && (cred->usage != GSS_C_BOTH)) { *minor_status = 0; return(GSS_S_NO_CRED); } /* complain if the input token is non-null */ if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) { *minor_status = 0; return(GSS_S_DEFECTIVE_TOKEN); } /* create the ctx */ if ((ctx = (krb5_gss_ctx_id_rec *) xmalloc(sizeof(krb5_gss_ctx_id_rec))) == NULL) { *minor_status = ENOMEM; return(GSS_S_FAILURE); } /* fill in the ctx */ memset(ctx, 0, sizeof(krb5_gss_ctx_id_rec)); ctx_free = ctx; if ((code = krb5_auth_con_init(context, &ctx->auth_context))) goto fail; krb5_auth_con_setflags(context, ctx->auth_context, KRB5_AUTH_CONTEXT_DO_SEQUENCE); /* limit the encryption types negotiated (if requested) */ if (cred->req_enctypes) { if ((code = krb5_set_default_tgs_enctypes(context, cred->req_enctypes))) { goto fail; } } ctx->initiate = 1; ctx->gss_flags = (GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG | GSS_C_TRANS_FLAG | ((req_flags) & (GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG | GSS_C_DELEG_FLAG | GSS_C_DCE_STYLE | GSS_C_IDENTIFY_FLAG | GSS_C_EXTENDED_ERROR_FLAG))); ctx->seed_init = 0; ctx->big_endian = 0; /* all initiators do little-endian, as per spec */ ctx->seqstate = 0; if (req_flags & GSS_C_DCE_STYLE) ctx->gss_flags |= GSS_C_MUTUAL_FLAG; if ((code = krb5_timeofday(context, &now))) goto fail; if (time_req == 0 || time_req == GSS_C_INDEFINITE) { ctx->krb_times.endtime = 0; } else { ctx->krb_times.endtime = now + time_req; } if ((code = krb5_copy_principal(context, cred->princ, &ctx->here))) goto fail; if ((code = krb5_copy_principal(context, (krb5_principal) target_name, &ctx->there))) goto fail; code = get_credentials(context, cred, ctx->there, now, ctx->krb_times.endtime, &k_cred); if (code) goto fail; ctx->krb_times = k_cred->times; if (default_mech) { mech_type = (gss_OID) gss_mech_krb5; } if (generic_gss_copy_oid(minor_status, mech_type, &ctx->mech_used) != GSS_S_COMPLETE) { code = *minor_status; goto fail; } /* * Now try to make it static if at all possible.... */ ctx->mech_used = krb5_gss_convert_static_mech_oid(ctx->mech_used); { /* gsskrb5 v1 */ krb5_int32 seq_temp; if ((code = make_ap_req_v1(context, ctx, cred, k_cred, input_chan_bindings, mech_type, &token))) { if ((code == KRB5_FCC_NOFILE) || (code == KRB5_CC_NOTFOUND) || (code == KG_EMPTY_CCACHE)) major_status = GSS_S_NO_CRED; if (code == KRB5KRB_AP_ERR_TKT_EXPIRED) major_status = GSS_S_CREDENTIALS_EXPIRED; goto fail; } krb5_auth_con_getlocalseqnumber(context, ctx->auth_context, &seq_temp); ctx->seq_send = seq_temp; krb5_auth_con_getsendsubkey(context, ctx->auth_context, &ctx->subkey); } krb5_free_creds(context, k_cred); k_cred = NULL; ctx->enc = NULL; ctx->seq = NULL; ctx->have_acceptor_subkey = 0; code = kg_setup_keys(context, ctx, ctx->subkey, &ctx->cksumtype); if (code != 0) goto fail; /* at this point, the context is constructed and valid, hence, releaseable */ /* intern the context handle */ if (! kg_save_ctx_id((gss_ctx_id_t) ctx)) { code = G_VALIDATE_FAILED; goto fail; } *context_handle = (gss_ctx_id_t) ctx; ctx_free = 0; /* compute time_rec */ if (time_rec) { if ((code = krb5_timeofday(context, &now))) goto fail; *time_rec = ctx->krb_times.endtime - now; } /* set the other returns */ *output_token = token; if (ret_flags) *ret_flags = ctx->gss_flags; if (actual_mech_type) *actual_mech_type = mech_type; /* return successfully */ *minor_status = 0; if (ctx->gss_flags & GSS_C_MUTUAL_FLAG) { ctx->established = 0; return(GSS_S_CONTINUE_NEEDED); } else { ctx->seq_recv = ctx->seq_send; g_order_init(&(ctx->seqstate), ctx->seq_recv, (ctx->gss_flags & GSS_C_REPLAY_FLAG) != 0, (ctx->gss_flags & GSS_C_SEQUENCE_FLAG) != 0, ctx->proto); ctx->gss_flags |= GSS_C_PROT_READY_FLAG; ctx->established = 1; return(GSS_S_COMPLETE); } fail: if (ctx_free) { if (ctx_free->auth_context) krb5_auth_con_free(context, ctx_free->auth_context); if (ctx_free->here) krb5_free_principal(context, ctx_free->here); if (ctx_free->there) krb5_free_principal(context, ctx_free->there); if (ctx_free->subkey) krb5_free_keyblock(context, ctx_free->subkey); xfree(ctx_free); } else (void)krb5_gss_delete_sec_context(minor_status, context_handle, NULL); *minor_status = code; return (major_status); } /* * mutual_auth * * Handle the reply from the acceptor, if we're doing mutual auth. */ static OM_uint32 mutual_auth( OM_uint32 *minor_status, gss_ctx_id_t *context_handle, gss_name_t target_name, gss_OID mech_type, OM_uint32 req_flags, OM_uint32 time_req, gss_channel_bindings_t input_chan_bindings, gss_buffer_t input_token, gss_OID *actual_mech_type, gss_buffer_t output_token, OM_uint32 *ret_flags, OM_uint32 *time_rec, krb5_context context) { OM_uint32 major_status; unsigned char *ptr; char *sptr; krb5_data ap_rep; krb5_ap_rep_enc_part *ap_rep_data; krb5_timestamp now; krb5_gss_ctx_id_rec *ctx; krb5_error *krb_error; krb5_error_code code; krb5int_access kaccess; major_status = GSS_S_FAILURE; code = krb5int_accessor (&kaccess, KRB5INT_ACCESS_VERSION); if (code) goto fail; /* validate the context handle */ /*SUPPRESS 29*/ if (! kg_validate_ctx_id(*context_handle)) { *minor_status = (OM_uint32) G_VALIDATE_FAILED; return(GSS_S_NO_CONTEXT); } ctx = (krb5_gss_ctx_id_t) *context_handle; /* make sure the context is non-established, and that certain arguments are unchanged */ if ((ctx->established) || ((ctx->gss_flags & GSS_C_MUTUAL_FLAG) == 0)) { code = KG_CONTEXT_ESTABLISHED; goto fail; } if (! krb5_principal_compare(context, ctx->there, (krb5_principal) target_name)) { (void)krb5_gss_delete_sec_context(minor_status, context_handle, NULL); code = 0; major_status = GSS_S_BAD_NAME; goto fail; } /* verify the token and leave the AP_REP message in ap_rep */ if (input_token == GSS_C_NO_BUFFER) { (void)krb5_gss_delete_sec_context(minor_status, context_handle, NULL); code = 0; major_status = GSS_S_DEFECTIVE_TOKEN; goto fail; } ptr = (unsigned char *) input_token->value; if (ctx->gss_flags & GSS_C_DCE_STYLE) { /* Raw AP-REP */ ap_rep.length = input_token->length; ap_rep.data = (char *)input_token->value; } else if (g_verify_token_header(ctx->mech_used, &(ap_rep.length), &ptr, KG_TOK_CTX_AP_REP, input_token->length, 1)) { if (g_verify_token_header((gss_OID) ctx->mech_used, &(ap_rep.length), &ptr, KG_TOK_CTX_ERROR, input_token->length, 1) == 0) { /* Handle a KRB_ERROR message from the server */ sptr = (char *) ptr; /* PC compiler bug */ TREAD_STR(sptr, ap_rep.data, ap_rep.length); code = krb5_rd_error(context, &ap_rep, &krb_error); if (code) goto fail; if (krb_error->error) code = (krb5_error_code)krb_error->error + ERROR_TABLE_BASE_krb5; else code = 0; krb5_free_error(context, krb_error); goto fail; } else { *minor_status = 0; return(GSS_S_DEFECTIVE_TOKEN); } } sptr = (char *) ptr; /* PC compiler bug */ TREAD_STR(sptr, ap_rep.data, ap_rep.length); /* decode the ap_rep */ if ((code = krb5_rd_rep(context, ctx->auth_context, &ap_rep, &ap_rep_data))) { /* * XXX A hack for backwards compatiblity. * To be removed in 1999 -- proven */ krb5_auth_con_setuseruserkey(context, ctx->auth_context, ctx->subkey); if ((krb5_rd_rep(context, ctx->auth_context, &ap_rep, &ap_rep_data))) goto fail; } /* store away the sequence number */ ctx->seq_recv = ap_rep_data->seq_number; g_order_init(&(ctx->seqstate), ctx->seq_recv, (ctx->gss_flags & GSS_C_REPLAY_FLAG) != 0, (ctx->gss_flags & GSS_C_SEQUENCE_FLAG) !=0, ctx->proto); if (ap_rep_data->subkey != NULL && (ctx->proto == 1 || (ctx->gss_flags & GSS_C_DCE_STYLE) || ap_rep_data->subkey->enctype != ctx->subkey->enctype)) { /* Keep acceptor's subkey. */ ctx->have_acceptor_subkey = 1; code = krb5_copy_keyblock(context, ap_rep_data->subkey, &ctx->acceptor_subkey); if (code) { krb5_free_ap_rep_enc_part(context, ap_rep_data); goto fail; } code = kg_setup_keys(context, ctx, ctx->acceptor_subkey, &ctx->acceptor_subkey_cksumtype); if (code) { krb5_free_ap_rep_enc_part(context, ap_rep_data); goto fail; } } /* free the ap_rep_data */ krb5_free_ap_rep_enc_part(context, ap_rep_data); if (ctx->gss_flags & GSS_C_DCE_STYLE) { krb5_data outbuf; code = krb5_mk_rep_dce(context, ctx->auth_context, &outbuf); if (code) goto fail; output_token->value = outbuf.data; output_token->length = outbuf.length; } /* set established */ ctx->established = 1; /* set returns */ if (time_rec) { if ((code = krb5_timeofday(context, &now))) goto fail; *time_rec = ctx->krb_times.endtime - now; } if (ret_flags) *ret_flags = ctx->gss_flags; if (actual_mech_type) *actual_mech_type = mech_type; /* success */ *minor_status = 0; return GSS_S_COMPLETE; fail: (void)krb5_gss_delete_sec_context(minor_status, context_handle, NULL); *minor_status = code; return (major_status); } OM_uint32 krb5_gss_init_sec_context(minor_status, claimant_cred_handle, context_handle, target_name, mech_type, req_flags, time_req, input_chan_bindings, input_token, actual_mech_type, output_token, ret_flags, time_rec) OM_uint32 *minor_status; gss_cred_id_t claimant_cred_handle; gss_ctx_id_t *context_handle; gss_name_t target_name; gss_OID mech_type; OM_uint32 req_flags; OM_uint32 time_req; gss_channel_bindings_t input_chan_bindings; gss_buffer_t input_token; gss_OID *actual_mech_type; gss_buffer_t output_token; OM_uint32 *ret_flags; OM_uint32 *time_rec; { krb5_context context; krb5_gss_cred_id_t cred; int err; krb5_error_code kerr; int default_mech = 0; OM_uint32 major_status; OM_uint32 tmp_min_stat; if (*context_handle == GSS_C_NO_CONTEXT) { kerr = krb5_gss_init_context(&context); if (kerr) { *minor_status = kerr; return GSS_S_FAILURE; } if (GSS_ERROR(kg_sync_ccache_name(context, minor_status))) { save_error_info(*minor_status, context); krb5_free_context(context); return GSS_S_FAILURE; } } else { context = ((krb5_gss_ctx_id_rec *)*context_handle)->k5_context; } /* set up return values so they can be "freed" successfully */ major_status = GSS_S_FAILURE; /* Default major code */ output_token->length = 0; output_token->value = NULL; if (actual_mech_type) *actual_mech_type = NULL; /* verify that the target_name is valid and usable */ if (! kg_validate_name(target_name)) { *minor_status = (OM_uint32) G_VALIDATE_FAILED; save_error_info(*minor_status, context); if (*context_handle == GSS_C_NO_CONTEXT) krb5_free_context(context); return(GSS_S_CALL_BAD_STRUCTURE|GSS_S_BAD_NAME); } /* verify the credential, or use the default */ /*SUPPRESS 29*/ if (claimant_cred_handle == GSS_C_NO_CREDENTIAL) { major_status = kg_get_defcred(minor_status, (gss_cred_id_t *)&cred); if (major_status && GSS_ERROR(major_status)) { if (*context_handle == GSS_C_NO_CONTEXT) krb5_free_context(context); return(major_status); } } else { major_status = krb5_gss_validate_cred(minor_status, claimant_cred_handle); if (GSS_ERROR(major_status)) { save_error_info(*minor_status, context); if (*context_handle == GSS_C_NO_CONTEXT) krb5_free_context(context); return(major_status); } cred = (krb5_gss_cred_id_t) claimant_cred_handle; } kerr = k5_mutex_lock(&cred->lock); if (kerr) { if (claimant_cred_handle == GSS_C_NO_CREDENTIAL) krb5_gss_release_cred(minor_status, (gss_cred_id_t *)&cred); krb5_free_context(context); *minor_status = kerr; return GSS_S_FAILURE; } /* verify the mech_type */ err = 0; if (mech_type == GSS_C_NULL_OID) { default_mech = 1; if (cred->rfc_mech) { mech_type = (gss_OID) gss_mech_krb5; } else if (cred->prerfc_mech) { mech_type = (gss_OID) gss_mech_krb5_old; } else { err = 1; } } else if (g_OID_equal(mech_type, gss_mech_krb5)) { if (!cred->rfc_mech) err = 1; } else if (g_OID_equal(mech_type, gss_mech_krb5_old)) { if (!cred->prerfc_mech) err = 1; } else if (g_OID_equal(mech_type, gss_mech_krb5_wrong)) { if (!cred->rfc_mech) err = 1; } else { err = 1; } if (err) { k5_mutex_unlock(&cred->lock); if (claimant_cred_handle == GSS_C_NO_CREDENTIAL) krb5_gss_release_cred(minor_status, (gss_cred_id_t *)&cred); *minor_status = 0; if (*context_handle == GSS_C_NO_CONTEXT) krb5_free_context(context); return(GSS_S_BAD_MECH); } /* is this a new connection or not? */ /*SUPPRESS 29*/ if (*context_handle == GSS_C_NO_CONTEXT) { major_status = new_connection(minor_status, cred, context_handle, target_name, mech_type, req_flags, time_req, input_chan_bindings, input_token, actual_mech_type, output_token, ret_flags, time_rec, context, default_mech); k5_mutex_unlock(&cred->lock); if (*context_handle == GSS_C_NO_CONTEXT) { save_error_info (*minor_status, context); krb5_free_context(context); } else ((krb5_gss_ctx_id_rec *) *context_handle)->k5_context = context; } else { /* mutual_auth doesn't care about the credentials */ k5_mutex_unlock(&cred->lock); major_status = mutual_auth(minor_status, context_handle, target_name, mech_type, req_flags, time_req, input_chan_bindings, input_token, actual_mech_type, output_token, ret_flags, time_rec, context); /* If context_handle is now NO_CONTEXT, mutual_auth called delete_sec_context, which would've zapped the krb5 context too. */ } if (claimant_cred_handle == GSS_C_NO_CREDENTIAL) krb5_gss_release_cred(&tmp_min_stat, (gss_cred_id_t *)&cred); return(major_status); } #ifndef _WIN32 k5_mutex_t kg_kdc_flag_mutex = K5_MUTEX_PARTIAL_INITIALIZER; static int kdc_flag = 0; #endif krb5_error_code krb5_gss_init_context (krb5_context *ctxp) { krb5_error_code err; #ifndef _WIN32 int is_kdc; #endif err = gss_krb5int_initialize_library(); if (err) return err; #ifndef _WIN32 err = k5_mutex_lock(&kg_kdc_flag_mutex); if (err) return err; is_kdc = kdc_flag; k5_mutex_unlock(&kg_kdc_flag_mutex); if (is_kdc) return krb5int_init_context_kdc(ctxp); #endif return krb5_init_context(ctxp); } #ifndef _WIN32 OM_uint32 krb5int_gss_use_kdc_context(OM_uint32 *minor_status, const gss_OID desired_mech, const gss_OID desired_object, gss_buffer_t value) { OM_uint32 err; *minor_status = 0; err = gss_krb5int_initialize_library(); if (err) return err; *minor_status = k5_mutex_lock(&kg_kdc_flag_mutex); if (*minor_status) { return GSS_S_FAILURE; } kdc_flag = 1; k5_mutex_unlock(&kg_kdc_flag_mutex); return GSS_S_COMPLETE; } #endif