diff options
Diffstat (limited to 'source4/heimdal/lib/krb5/get_cred.c')
| -rw-r--r-- | source4/heimdal/lib/krb5/get_cred.c | 588 |
1 files changed, 371 insertions, 217 deletions
diff --git a/source4/heimdal/lib/krb5/get_cred.c b/source4/heimdal/lib/krb5/get_cred.c index fc78945c63..268550b229 100644 --- a/source4/heimdal/lib/krb5/get_cred.c +++ b/source4/heimdal/lib/krb5/get_cred.c @@ -1,39 +1,39 @@ /* - * Copyright (c) 1997 - 2007 Kungliga Tekniska Högskolan - * (Royal Institute of Technology, Stockholm, Sweden). - * All rights reserved. + * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. * - * 2. 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. + * 2. 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. * - * 3. Neither the name of the Institute nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. * - * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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. + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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 <krb5_locl.h> -RCSID("$Id: get_cred.c 22530 2008-01-27 11:48:16Z lha $"); +RCSID("$Id: get_cred.c 23280 2008-06-23 03:26:18Z lha $"); /* * Take the `body' and encode it into `padata' using the credentials @@ -41,12 +41,11 @@ RCSID("$Id: get_cred.c 22530 2008-01-27 11:48:16Z lha $"); */ static krb5_error_code -make_pa_tgs_req(krb5_context context, +make_pa_tgs_req(krb5_context context, krb5_auth_context ac, KDC_REQ_BODY *body, PA_DATA *padata, - krb5_creds *creds, - krb5_key_usage usage) + krb5_creds *creds) { u_char *buf; size_t buf_size; @@ -65,8 +64,7 @@ make_pa_tgs_req(krb5_context context, ret = _krb5_mk_req_internal(context, &ac, 0, &in_data, creds, &padata->padata_value, KRB5_KU_TGS_REQ_AUTH_CKSUM, - usage - /* KRB5_KU_TGS_REQ_AUTH */); + KRB5_KU_TGS_REQ_AUTH); out: free (buf); if(ret) @@ -101,7 +99,7 @@ set_auth_data (krb5_context context, ALLOC(req_body->enc_authorization_data, 1); if (req_body->enc_authorization_data == NULL) { free (buf); - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ENOMEM, "malloc: out of memory"); return ENOMEM; } ret = krb5_crypto_init(context, key, 0, &crypto); @@ -111,9 +109,9 @@ set_auth_data (krb5_context context, req_body->enc_authorization_data = NULL; return ret; } - krb5_encrypt_EncryptedData(context, + krb5_encrypt_EncryptedData(context, crypto, - KRB5_KU_TGS_REQ_AUTH_DAT_SUBKEY, + KRB5_KU_TGS_REQ_AUTH_DAT_SUBKEY, /* KRB5_KU_TGS_REQ_AUTH_DAT_SESSION? */ buf, len, @@ -125,7 +123,7 @@ set_auth_data (krb5_context context, req_body->enc_authorization_data = NULL; } return 0; -} +} /* * Create a tgs-req in `t' with `addresses', `flags', `second_ticket' @@ -144,8 +142,7 @@ init_tgs_req (krb5_context context, unsigned nonce, const METHOD_DATA *padata, krb5_keyblock **subkey, - TGS_REQ *t, - krb5_key_usage usage) + TGS_REQ *t) { krb5_error_code ret = 0; @@ -156,14 +153,14 @@ init_tgs_req (krb5_context context, ALLOC_SEQ(&t->req_body.etype, 1); if(t->req_body.etype.val == NULL) { ret = ENOMEM; - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ret, "malloc: out of memory"); goto fail; } t->req_body.etype.val[0] = in_creds->session.keytype; } else { - ret = krb5_init_etype(context, - &t->req_body.etype.len, - &t->req_body.etype.val, + ret = krb5_init_etype(context, + &t->req_body.etype.len, + &t->req_body.etype.val, NULL); } if (ret) @@ -176,7 +173,7 @@ init_tgs_req (krb5_context context, ALLOC(t->req_body.sname, 1); if (t->req_body.sname == NULL) { ret = ENOMEM; - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ret, "malloc: out of memory"); goto fail; } @@ -192,39 +189,39 @@ init_tgs_req (krb5_context context, ALLOC(t->req_body.till, 1); if(t->req_body.till == NULL){ ret = ENOMEM; - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ret, "malloc: out of memory"); goto fail; } *t->req_body.till = in_creds->times.endtime; - + t->req_body.nonce = nonce; if(second_ticket){ ALLOC(t->req_body.additional_tickets, 1); if (t->req_body.additional_tickets == NULL) { ret = ENOMEM; - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ret, "malloc: out of memory"); goto fail; } ALLOC_SEQ(t->req_body.additional_tickets, 1); if (t->req_body.additional_tickets->val == NULL) { ret = ENOMEM; - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ret, "malloc: out of memory"); goto fail; } - ret = copy_Ticket(second_ticket, t->req_body.additional_tickets->val); + ret = copy_Ticket(second_ticket, t->req_body.additional_tickets->val); if (ret) goto fail; } ALLOC(t->padata, 1); if (t->padata == NULL) { ret = ENOMEM; - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ret, "malloc: out of memory"); goto fail; } ALLOC_SEQ(t->padata, 1 + padata->len); if (t->padata->val == NULL) { ret = ENOMEM; - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ret, "malloc: out of memory"); goto fail; } { @@ -232,7 +229,7 @@ init_tgs_req (krb5_context context, for (i = 0; i < padata->len; i++) { ret = copy_PA_DATA(&padata->val[i], &t->padata->val[i + 1]); if (ret) { - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ret, "malloc: out of memory"); goto fail; } } @@ -278,10 +275,9 @@ init_tgs_req (krb5_context context, ret = make_pa_tgs_req(context, ac, - &t->req_body, + &t->req_body, &t->padata->val[0], - krbtgt, - usage); + krbtgt); if(ret) { if (key) krb5_free_keyblock (context, key); @@ -315,7 +311,7 @@ _krb5_get_krbtgt(krb5_context context, if (ret) return ret; - ret = krb5_make_principal(context, + ret = krb5_make_principal(context, &tmp_cred.server, realm, KRB5_TGS_NAME, @@ -349,7 +345,7 @@ decrypt_tkt_with_subkey (krb5_context context, krb5_data data; size_t size; krb5_crypto crypto; - + ret = krb5_crypto_init(context, key, 0, &crypto); if (ret) return ret; @@ -373,33 +369,32 @@ decrypt_tkt_with_subkey (krb5_context context, } if (ret) return ret; - + ret = krb5_decode_EncASRepPart(context, data.data, data.length, - &dec_rep->enc_part, + &dec_rep->enc_part, &size); if (ret) ret = krb5_decode_EncTGSRepPart(context, data.data, data.length, - &dec_rep->enc_part, + &dec_rep->enc_part, &size); krb5_data_free (&data); return ret; } static krb5_error_code -get_cred_kdc_usage(krb5_context context, - krb5_ccache id, - krb5_kdc_flags flags, - krb5_addresses *addresses, - krb5_creds *in_creds, - krb5_creds *krbtgt, - krb5_principal impersonate_principal, - Ticket *second_ticket, - krb5_creds *out_creds, - krb5_key_usage usage) +get_cred_kdc(krb5_context context, + krb5_ccache id, + krb5_kdc_flags flags, + krb5_addresses *addresses, + krb5_creds *in_creds, + krb5_creds *krbtgt, + krb5_principal impersonate_principal, + Ticket *second_ticket, + krb5_creds *out_creds) { TGS_REQ req; krb5_data enc; @@ -412,7 +407,7 @@ get_cred_kdc_usage(krb5_context context, size_t len; Ticket second_ticket_data; METHOD_DATA padata; - + krb5_data_zero(&resp); krb5_data_zero(&enc); padata.val = NULL; @@ -420,10 +415,10 @@ get_cred_kdc_usage(krb5_context context, krb5_generate_random_block(&nonce, sizeof(nonce)); nonce &= 0xffffffff; - + if(flags.b.enc_tkt_in_skey && second_ticket == NULL){ - ret = decode_Ticket(in_creds->second_ticket.data, - in_creds->second_ticket.length, + ret = decode_Ticket(in_creds->second_ticket.data, + in_creds->second_ticket.length, &second_ticket_data, &len); if(ret) return ret; @@ -460,7 +455,7 @@ get_cred_kdc_usage(krb5_context context, KRB5_KU_OTHER_CKSUM, 0, data.data, - data.length, + data.length, &self.cksum); krb5_crypto_destroy(context, crypto); krb5_data_free(&data); @@ -491,14 +486,13 @@ get_cred_kdc_usage(krb5_context context, krbtgt, nonce, &padata, - &subkey, - &req, - usage); + &subkey, + &req); if (ret) goto out; ASN1_MALLOC_ENCODE(TGS_REQ, enc.data, enc.length, &req, &len, ret); - if (ret) + if (ret) goto out; if(enc.length != len) krb5_abortx(context, "internal error in ASN.1 encoder"); @@ -526,20 +520,26 @@ get_cred_kdc_usage(krb5_context context, goto out; memset(&rep, 0, sizeof(rep)); - if(decode_TGS_REP(resp.data, resp.length, &rep.kdc_rep, &len) == 0){ - ret = krb5_copy_principal(context, - in_creds->client, + if(decode_TGS_REP(resp.data, resp.length, &rep.kdc_rep, &len) == 0) { + unsigned eflags = 0; + + ret = krb5_copy_principal(context, + in_creds->client, &out_creds->client); if(ret) - goto out; - ret = krb5_copy_principal(context, - in_creds->server, + goto out2; + ret = krb5_copy_principal(context, + in_creds->server, &out_creds->server); if(ret) - goto out; + goto out2; /* this should go someplace else */ out_creds->times.endtime = in_creds->times.endtime; + /* XXX should do better testing */ + if (flags.b.constrained_delegation || impersonate_principal) + eflags |= EXTRACT_TICKET_ALLOW_CNAME_MISMATCH; + ret = _krb5_extract_ticket(context, &rep, out_creds, @@ -548,10 +548,10 @@ get_cred_kdc_usage(krb5_context context, KRB5_KU_TGS_REP_ENC_PART_SESSION, &krbtgt->addresses, nonce, - EXTRACT_TICKET_ALLOW_CNAME_MISMATCH| - EXTRACT_TICKET_ALLOW_SERVER_MISMATCH, + eflags, decrypt_tkt_with_subkey, subkey); + out2: krb5_free_kdc_rep(context, &rep); } else if(krb5_rd_error(context, &resp, &error) == 0) { ret = krb5_error_from_rd_error(context, &error, in_creds); @@ -575,52 +575,50 @@ out: free(subkey); } return ret; - + } +/* + * same as above, just get local addresses first if the krbtgt have + * them and the realm is not addressless + */ + static krb5_error_code -get_cred_kdc(krb5_context context, - krb5_ccache id, - krb5_kdc_flags flags, - krb5_addresses *addresses, - krb5_creds *in_creds, - krb5_creds *krbtgt, - krb5_principal impersonate_principal, - Ticket *second_ticket, - krb5_creds *out_creds) +get_cred_kdc_address(krb5_context context, + krb5_ccache id, + krb5_kdc_flags flags, + krb5_addresses *addrs, + krb5_creds *in_creds, + krb5_creds *krbtgt, + krb5_principal impersonate_principal, + Ticket *second_ticket, + krb5_creds *out_creds) { krb5_error_code ret; + krb5_addresses addresses = { 0, NULL }; - ret = get_cred_kdc_usage(context, id, flags, addresses, in_creds, - krbtgt, impersonate_principal, second_ticket, - out_creds, KRB5_KU_TGS_REQ_AUTH); - if (ret == KRB5KRB_AP_ERR_BAD_INTEGRITY) { - krb5_clear_error_string (context); - ret = get_cred_kdc_usage(context, id, flags, addresses, in_creds, - krbtgt, impersonate_principal, second_ticket, - out_creds, KRB5_KU_AP_REQ_AUTH); - } - return ret; -} + /* + * Inherit the address-ness of the krbtgt if the address is not + * specified. + */ -/* same as above, just get local addresses first */ + if (addrs == NULL && krbtgt->addresses.len != 0) { + krb5_boolean noaddr; -static krb5_error_code -get_cred_kdc_la(krb5_context context, krb5_ccache id, krb5_kdc_flags flags, - krb5_creds *in_creds, krb5_creds *krbtgt, - krb5_principal impersonate_principal, Ticket *second_ticket, - krb5_creds *out_creds) -{ - krb5_error_code ret; - krb5_addresses addresses, *addrs = &addresses; - - krb5_get_all_client_addrs(context, &addresses); - /* XXX this sucks. */ - if(addresses.len == 0) - addrs = NULL; - ret = get_cred_kdc(context, id, flags, addrs, - in_creds, krbtgt, impersonate_principal, second_ticket, - out_creds); + krb5_appdefault_boolean(context, NULL, krbtgt->server->realm, + "no-addresses", FALSE, &noaddr); + + if (!noaddr) { + krb5_get_all_client_addrs(context, &addresses); + /* XXX this sucks. */ + addrs = &addresses; + if(addresses.len == 0) + addrs = NULL; + } + } + ret = get_cred_kdc(context, id, flags, addrs, in_creds, + krbtgt, impersonate_principal, + second_ticket, out_creds); krb5_free_addresses(context, &addresses); return ret; } @@ -640,7 +638,7 @@ krb5_get_kdc_cred(krb5_context context, *out_creds = calloc(1, sizeof(**out_creds)); if(*out_creds == NULL) { - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ENOMEM, "malloc: out of memory"); return ENOMEM; } ret = _krb5_get_krbtgt (context, @@ -651,7 +649,7 @@ krb5_get_kdc_cred(krb5_context context, free(*out_creds); return ret; } - ret = get_cred_kdc(context, id, flags, addresses, + ret = get_cred_kdc(context, id, flags, addresses, in_creds, krbtgt, NULL, NULL, *out_creds); krb5_free_creds (context, krbtgt); if(ret) @@ -659,8 +657,8 @@ krb5_get_kdc_cred(krb5_context context, return ret; } -static void -not_found(krb5_context context, krb5_const_principal p) +static int +not_found(krb5_context context, krb5_const_principal p, krb5_error_code code) { krb5_error_code ret; char *str; @@ -668,10 +666,11 @@ not_found(krb5_context context, krb5_const_principal p) ret = krb5_unparse_name(context, p, &str); if(ret) { krb5_clear_error_string(context); - return; + return code; } - krb5_set_error_string(context, "Matching credential (%s) not found", str); + krb5_set_error_message(context, code, "Matching credential (%s) not found", str); free(str); + return code; } static krb5_error_code @@ -686,24 +685,23 @@ find_cred(krb5_context context, krb5_cc_clear_mcred(&mcreds); mcreds.server = server; - ret = krb5_cc_retrieve_cred(context, id, KRB5_TC_DONT_MATCH_REALM, + ret = krb5_cc_retrieve_cred(context, id, KRB5_TC_DONT_MATCH_REALM, &mcreds, out_creds); if(ret == 0) return 0; while(tgts && *tgts){ - if(krb5_compare_creds(context, KRB5_TC_DONT_MATCH_REALM, + if(krb5_compare_creds(context, KRB5_TC_DONT_MATCH_REALM, &mcreds, *tgts)){ ret = krb5_copy_creds_contents(context, *tgts, out_creds); return ret; } tgts++; } - not_found(context, server); - return KRB5_CC_NOTFOUND; + return not_found(context, server, KRB5_CC_NOTFOUND); } static krb5_error_code -add_cred(krb5_context context, krb5_creds ***tgts, krb5_creds *tkt) +add_cred(krb5_context context, krb5_creds const *tkt, krb5_creds ***tgts) { int i; krb5_error_code ret; @@ -712,7 +710,7 @@ add_cred(krb5_context context, krb5_creds ***tgts, krb5_creds *tkt) for(i = 0; tmp && tmp[i]; i++); /* XXX */ tmp = realloc(tmp, (i+2)*sizeof(*tmp)); if(tmp == NULL) { - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ENOMEM, "malloc: out of memory"); return ENOMEM; } *tgts = tmp; @@ -737,14 +735,14 @@ get_cred(server) */ static krb5_error_code -get_cred_from_kdc_flags(krb5_context context, - krb5_kdc_flags flags, - krb5_ccache ccache, - krb5_creds *in_creds, - krb5_principal impersonate_principal, - Ticket *second_ticket, - krb5_creds **out_creds, - krb5_creds ***ret_tgts) +get_cred_kdc_capath(krb5_context context, + krb5_kdc_flags flags, + krb5_ccache ccache, + krb5_creds *in_creds, + krb5_principal impersonate_principal, + Ticket *second_ticket, + krb5_creds **out_creds, + krb5_creds ***ret_tgts) { krb5_error_code ret; krb5_creds *tgt, tmp_creds; @@ -759,7 +757,7 @@ get_cred_from_kdc_flags(krb5_context context, if(ret) return ret; - try_realm = krb5_config_get_string(context, NULL, "capaths", + try_realm = krb5_config_get_string(context, NULL, "capaths", client_realm, server_realm, NULL); if (try_realm == NULL) try_realm = client_realm; @@ -768,7 +766,7 @@ get_cred_from_kdc_flags(krb5_context context, &tmp_creds.server, try_realm, KRB5_TGS_NAME, - server_realm, + server_realm, NULL); if(ret){ krb5_free_principal(context, tmp_creds.client); @@ -776,32 +774,20 @@ get_cred_from_kdc_flags(krb5_context context, } { krb5_creds tgts; - /* XXX try krb5_cc_retrieve_cred first? */ - ret = find_cred(context, ccache, tmp_creds.server, + + ret = find_cred(context, ccache, tmp_creds.server, *ret_tgts, &tgts); if(ret == 0){ *out_creds = calloc(1, sizeof(**out_creds)); if(*out_creds == NULL) { - krb5_set_error_string(context, "malloc: out of memory"); ret = ENOMEM; + krb5_set_error_message(context, ret, "malloc: out of memory"); } else { - krb5_boolean noaddr; - - krb5_appdefault_boolean(context, NULL, tgts.server->realm, - "no-addresses", FALSE, &noaddr); - - if (noaddr) - ret = get_cred_kdc(context, ccache, flags, NULL, - in_creds, &tgts, - impersonate_principal, - second_ticket, - *out_creds); - else - ret = get_cred_kdc_la(context, ccache, flags, - in_creds, &tgts, - impersonate_principal, - second_ticket, - *out_creds); + ret = get_cred_kdc_address(context, ccache, flags, NULL, + in_creds, &tgts, + impersonate_principal, + second_ticket, + *out_creds); if (ret) { free (*out_creds); *out_creds = NULL; @@ -813,22 +799,21 @@ get_cred_from_kdc_flags(krb5_context context, return ret; } } - if(krb5_realm_compare(context, in_creds->client, in_creds->server)) { - not_found(context, in_creds->server); - return KRB5_CC_NOTFOUND; - } + if(krb5_realm_compare(context, in_creds->client, in_creds->server)) + return not_found(context, in_creds->server, KRB5_CC_NOTFOUND); + /* XXX this can loop forever */ while(1){ heim_general_string tgt_inst; - ret = get_cred_from_kdc_flags(context, flags, ccache, &tmp_creds, - NULL, NULL, &tgt, ret_tgts); + ret = get_cred_kdc_capath(context, flags, ccache, &tmp_creds, + NULL, NULL, &tgt, ret_tgts); if(ret) { krb5_free_principal(context, tmp_creds.server); krb5_free_principal(context, tmp_creds.client); return ret; } - ret = add_cred(context, ret_tgts, tgt); + ret = add_cred(context, tgt, ret_tgts); if(ret) { krb5_free_principal(context, tmp_creds.server); krb5_free_principal(context, tmp_creds.client); @@ -838,7 +823,7 @@ get_cred_from_kdc_flags(krb5_context context, if(strcmp(tgt_inst, server_realm) == 0) break; krb5_free_principal(context, tmp_creds.server); - ret = krb5_make_principal(context, &tmp_creds.server, + ret = krb5_make_principal(context, &tmp_creds.server, tgt_inst, KRB5_TGS_NAME, server_realm, NULL); if(ret) { krb5_free_principal(context, tmp_creds.server); @@ -857,22 +842,12 @@ get_cred_from_kdc_flags(krb5_context context, krb5_free_principal(context, tmp_creds.client); *out_creds = calloc(1, sizeof(**out_creds)); if(*out_creds == NULL) { - krb5_set_error_string(context, "malloc: out of memory"); ret = ENOMEM; + krb5_set_error_message(context, ret, "malloc: out of memory"); } else { - krb5_boolean noaddr; - - krb5_appdefault_boolean(context, NULL, tgt->server->realm, - "no-addresses", KRB5_ADDRESSLESS_DEFAULT, - &noaddr); - if (noaddr) - ret = get_cred_kdc (context, ccache, flags, NULL, - in_creds, tgt, NULL, NULL, - *out_creds); - else - ret = get_cred_kdc_la(context, ccache, flags, - in_creds, tgt, NULL, NULL, - *out_creds); + ret = get_cred_kdc_address (context, ccache, flags, NULL, + in_creds, tgt, impersonate_principal, + second_ticket, *out_creds); if (ret) { free (*out_creds); *out_creds = NULL; @@ -882,6 +857,185 @@ get_cred_from_kdc_flags(krb5_context context, return ret; } +static krb5_error_code +get_cred_kdc_referral(krb5_context context, + krb5_kdc_flags flags, + krb5_ccache ccache, + krb5_creds *in_creds, + krb5_principal impersonate_principal, + Ticket *second_ticket, + krb5_creds **out_creds, + krb5_creds ***ret_tgts) +{ + krb5_const_realm client_realm; + krb5_error_code ret; + krb5_creds tgt, referral, ticket; + int loop = 0; + + memset(&tgt, 0, sizeof(tgt)); + memset(&ticket, 0, sizeof(ticket)); + + flags.b.canonicalize = 1; + + *out_creds = NULL; + + client_realm = krb5_principal_get_realm(context, in_creds->client); + + /* find tgt for the clients base realm */ + { + krb5_principal tgtname; + + ret = krb5_make_principal(context, &tgtname, + client_realm, + KRB5_TGS_NAME, + client_realm, + NULL); + if(ret) + return ret; + + ret = find_cred(context, ccache, tgtname, *ret_tgts, &tgt); + krb5_free_principal(context, tgtname); + if (ret) + return ret; + } + + referral = *in_creds; + ret = krb5_copy_principal(context, in_creds->server, &referral.server); + if (ret) { + krb5_free_cred_contents(context, &tgt); + return ret; + } + ret = krb5_principal_set_realm(context, referral.server, client_realm); + if (ret) { + krb5_free_cred_contents(context, &tgt); + krb5_free_principal(context, referral.server); + return ret; + } + + while (loop++ < 17) { + krb5_creds **tickets; + krb5_creds mcreds; + char *referral_realm; + + /* Use cache if we are not doing impersonation or contrainte deleg */ + if (impersonate_principal == NULL || flags.b.constrained_delegation) { + krb5_cc_clear_mcred(&mcreds); + mcreds.server = referral.server; + ret = krb5_cc_retrieve_cred(context, ccache, 0, &mcreds, &ticket); + } else + ret = EINVAL; + + if (ret) { + ret = get_cred_kdc_address (context, ccache, flags, NULL, + &referral, &tgt, impersonate_principal, + second_ticket, &ticket); + if (ret) + goto out; + } + + /* Did we get the right ticket ? */ + if (krb5_principal_compare_any_realm(context, + referral.server, + ticket.server)) + break; + + if (ticket.server->name.name_string.len != 2 && + strcmp(ticket.server->name.name_string.val[0], KRB5_TGS_NAME) != 0) + { + krb5_set_error_message(context, KRB5KRB_AP_ERR_NOT_US, + "Got back an non krbtgt ticket referrals"); + krb5_free_cred_contents(context, &ticket); + return KRB5KRB_AP_ERR_NOT_US; + } + + referral_realm = ticket.server->name.name_string.val[1]; + + /* check that there are no referrals loops */ + tickets = *ret_tgts; + + krb5_cc_clear_mcred(&mcreds); + mcreds.server = ticket.server; + + while(tickets && *tickets){ + if(krb5_compare_creds(context, + KRB5_TC_DONT_MATCH_REALM, + &mcreds, + *tickets)) + { + krb5_set_error_message(context, KRB5_GET_IN_TKT_LOOP, + "Referral from %s loops back to realm %s", + tgt.server->realm, + referral_realm); + krb5_free_cred_contents(context, &ticket); + return KRB5_GET_IN_TKT_LOOP; + } + tickets++; + } + + ret = add_cred(context, &ticket, ret_tgts); + if (ret) { + krb5_free_cred_contents(context, &ticket); + goto out; + } + + /* try realm in the referral */ + ret = krb5_principal_set_realm(context, + referral.server, + referral_realm); + krb5_free_cred_contents(context, &tgt); + tgt = ticket; + memset(&ticket, 0, sizeof(ticket)); + if (ret) + goto out; + } + + ret = krb5_copy_creds(context, &ticket, out_creds); + +out: + krb5_free_principal(context, referral.server); + krb5_free_cred_contents(context, &tgt); + return ret; +} + + +/* + * Glue function between referrals version and old client chasing + * codebase. + */ + +static krb5_error_code +get_cred_kdc_any(krb5_context context, + krb5_kdc_flags flags, + krb5_ccache ccache, + krb5_creds *in_creds, + krb5_principal impersonate_principal, + Ticket *second_ticket, + krb5_creds **out_creds, + krb5_creds ***ret_tgts) +{ + krb5_error_code ret; + + ret = get_cred_kdc_referral(context, + flags, + ccache, + in_creds, + impersonate_principal, + second_ticket, + out_creds, + ret_tgts); + if (ret == 0 || flags.b.canonicalize) + return ret; + return get_cred_kdc_capath(context, + flags, + ccache, + in_creds, + impersonate_principal, + second_ticket, + out_creds, + ret_tgts); +} + + krb5_error_code KRB5_LIB_FUNCTION krb5_get_cred_from_kdc_opt(krb5_context context, krb5_ccache ccache, @@ -892,9 +1046,9 @@ krb5_get_cred_from_kdc_opt(krb5_context context, { krb5_kdc_flags f; f.i = flags; - return get_cred_from_kdc_flags(context, f, ccache, - in_creds, NULL, NULL, - out_creds, ret_tgts); + return get_cred_kdc_any(context, f, ccache, + in_creds, NULL, NULL, + out_creds, ret_tgts); } krb5_error_code KRB5_LIB_FUNCTION @@ -904,10 +1058,10 @@ krb5_get_cred_from_kdc(krb5_context context, krb5_creds **out_creds, krb5_creds ***ret_tgts) { - return krb5_get_cred_from_kdc_opt(context, ccache, + return krb5_get_cred_from_kdc_opt(context, ccache, in_creds, out_creds, ret_tgts, 0); } - + krb5_error_code KRB5_LIB_FUNCTION krb5_get_credentials_with_flags(krb5_context context, @@ -921,18 +1075,18 @@ krb5_get_credentials_with_flags(krb5_context context, krb5_creds **tgts; krb5_creds *res_creds; int i; - + *out_creds = NULL; res_creds = calloc(1, sizeof(*res_creds)); if (res_creds == NULL) { - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ENOMEM, "malloc: out of memory"); return ENOMEM; } if (in_creds->session.keytype) options |= KRB5_TC_MATCH_KEYTYPE; - /* + /* * If we got a credential, check if credential is expired before * returning it. */ @@ -941,7 +1095,7 @@ krb5_get_credentials_with_flags(krb5_context context, in_creds->session.keytype ? KRB5_TC_MATCH_KEYTYPE : 0, in_creds, res_creds); - /* + /* * If we got a credential, check if credential is expired before * returning it, but only if KRB5_GC_EXPIRED_OK is not set. */ @@ -953,7 +1107,7 @@ krb5_get_credentials_with_flags(krb5_context context, *out_creds = res_creds; return 0; } - + krb5_timeofday(context, &timeret); if(res_creds->times.endtime > timeret) { *out_creds = res_creds; @@ -967,18 +1121,17 @@ krb5_get_credentials_with_flags(krb5_context context, return ret; } free(res_creds); - if(options & KRB5_GC_CACHED) { - not_found(context, in_creds->server); - return KRB5_CC_NOTFOUND; - } + if(options & KRB5_GC_CACHED) + return not_found(context, in_creds->server, KRB5_CC_NOTFOUND); + if(options & KRB5_GC_USER_USER) flags.b.enc_tkt_in_skey = 1; if (flags.b.enc_tkt_in_skey) options |= KRB5_GC_NO_STORE; tgts = NULL; - ret = get_cred_from_kdc_flags(context, flags, ccache, - in_creds, NULL, NULL, out_creds, &tgts); + ret = get_cred_kdc_any(context, flags, ccache, + in_creds, NULL, NULL, out_creds, &tgts); for(i = 0; tgts && tgts[i]; i++) { krb5_cc_store_cred(context, ccache, tgts[i]); krb5_free_creds(context, tgts[i]); @@ -1015,7 +1168,7 @@ krb5_get_creds_opt_alloc(krb5_context context, krb5_get_creds_opt *opt) { *opt = calloc(1, sizeof(**opt)); if (*opt == NULL) { - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ENOMEM, "malloc: out of memory"); return ENOMEM; } return 0; @@ -1079,14 +1232,14 @@ krb5_get_creds_opt_set_ticket(krb5_context context, opt->ticket = malloc(sizeof(*ticket)); if (opt->ticket == NULL) { - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ENOMEM, "malloc: out of memory"); return ENOMEM; } ret = copy_Ticket(ticket, opt->ticket); if (ret) { free(opt->ticket); opt->ticket = NULL; - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ret, "malloc: out of memory"); return ret; } } @@ -1109,7 +1262,7 @@ krb5_get_creds(krb5_context context, krb5_creds **tgts; krb5_creds *res_creds; int i; - + memset(&in_creds, 0, sizeof(in_creds)); in_creds.server = rk_UNCONST(inprinc); @@ -1124,7 +1277,7 @@ krb5_get_creds(krb5_context context, res_creds = calloc(1, sizeof(*res_creds)); if (res_creds == NULL) { krb5_free_principal(context, in_creds.client); - krb5_set_error_string(context, "malloc: out of memory"); + krb5_set_error_message(context, ENOMEM, "malloc: out of memory"); return ENOMEM; } @@ -1133,7 +1286,7 @@ krb5_get_creds(krb5_context context, options |= KRB5_TC_MATCH_KEYTYPE; } - /* + /* * If we got a credential, check if credential is expired before * returning it. */ @@ -1141,7 +1294,7 @@ krb5_get_creds(krb5_context context, ccache, opt->enctype ? KRB5_TC_MATCH_KEYTYPE : 0, &in_creds, res_creds); - /* + /* * If we got a credential, check if credential is expired before * returning it, but only if KRB5_GC_EXPIRED_OK is not set. */ @@ -1154,7 +1307,7 @@ krb5_get_creds(krb5_context context, krb5_free_principal(context, in_creds.client); return 0; } - + krb5_timeofday(context, &timeret); if(res_creds->times.endtime > timeret) { *out_creds = res_creds; @@ -1171,9 +1324,8 @@ krb5_get_creds(krb5_context context, } free(res_creds); if(options & KRB5_GC_CACHED) { - not_found(context, in_creds.server); krb5_free_principal(context, in_creds.client); - return KRB5_CC_NOTFOUND; + return not_found(context, in_creds.server, KRB5_CC_NOTFOUND); } if(options & KRB5_GC_USER_USER) { flags.b.enc_tkt_in_skey = 1; @@ -1187,11 +1339,13 @@ krb5_get_creds(krb5_context context, flags.b.request_anonymous = 1; /* XXX ARGH confusion */ flags.b.constrained_delegation = 1; } + if (options & KRB5_GC_CANONICALIZE) + flags.b.canonicalize = 1; tgts = NULL; - ret = get_cred_from_kdc_flags(context, flags, ccache, - &in_creds, opt->self, opt->ticket, - out_creds, &tgts); + ret = get_cred_kdc_any(context, flags, ccache, + &in_creds, opt->self, opt->ticket, + out_creds, &tgts); krb5_free_principal(context, in_creds.client); for(i = 0; tgts && tgts[i]; i++) { krb5_cc_store_cred(context, ccache, tgts[i]); |