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zxidwsc.c
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zxidwsc.c
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/* zxidwsc.c - Handwritten nitty-gritty functions for Liberty ID-WSF Web Services Client
* Copyright (c) 2009-2011 Sampo Kellomaki (sampo@iki.fi), All Rights Reserved.
* Copyright (c) 2007-2009 Symlabs (symlabs@symlabs.com), All Rights Reserved.
* Author: Sampo Kellomaki (sampo@iki.fi)
* This is confidential unpublished proprietary source code of the author.
* NO WARRANTY, not even implied warranties. Contains trade secrets.
* Distribution prohibited unless authorized in writing.
* Licensed under Apache License 2.0, see file COPYING.
* $Id: zxidwsc.c,v 1.19 2010-01-08 02:10:09 sampo Exp $
*
* 7.1.2007, created --Sampo
* 7.10.2008, added documentation --Sampo
* 7.1.2010, added WSC signing --Sampo
* 31.5.2010, added WSC sig validation and PDP calls --Sampo
* 16.2.2011, added disable security option VALID_OPT --Sampo
*/
#include "platform.h" /* needed on Win32 for pthread_mutex_lock() et al. */
#include "errmac.h"
#include "zxid.h"
#include "zxidpriv.h"
#include "zxidutil.h"
#include "zxidconf.h"
#include "saml2.h"
#include "wsf.h"
#include "c/zx-const.h"
#include "c/zx-ns.h"
#include "c/zx-data.h"
#include "c/zx-e-data.h"
/*() WSC response validation work horse. This check the ID-WSF [SOAPbind2] specified
* criteria, as well as additional criteria and calls PDP, if configured.
*
* cf:: ZXID configuration object, see zxid_new_conf()
* ses:: Session object, used for attributes passed to az, and for recording errors
* az_cred:: (Optional) Additional authorization credentials or
* attributes, query string format. These credentials will be populated
* to the attribute pool in addition to the ones obtained from token and
* other sources. Then a PDP is called to get an authorization
* decision (matching obligations we support to those in the request,
* and obligations pleged by caller to those we insist on). See
* also PEPMAP configuration option. This implements generalized
* (application independent) Responder In PEP. To implement
* application dependent PEP features you should call zxid_az() directly.
* env:: Entire SOAP envelope as a data structure
* enve:: SOAP envelope as string
* return:: 1 on success, 0 on validation failure. Exact reason of the failure is
* available from ses->curflt and ses->curstatus.
*
* See also: zxid_wsp_validate() */
/* Called by: covimp_test x3, zxid_call_epr, zxid_wsc_valid_resp */
int zxid_wsc_valid_re_env(zxid_conf* cf, zxid_ses* ses, const char* az_cred, struct zx_e_Envelope_s* env, const char* enve)
{
int n_refs = 0;
struct zxsig_ref refs[ZXID_N_WSF_SIGNED_HEADERS];
struct timeval ourts;
struct timeval srcts = {0,501000};
zxid_entity* wsc_meta;
struct zx_wsse_Security_s* sec;
struct zx_e_Header_s* hdr;
struct zx_str* issuer;
struct zx_str* logpath;
struct zx_str* relto;
struct zx_str ss;
zxid_cgi cgi;
GETTIMEOFDAY(&ourts, 0);
zxid_set_fault(cf, ses, 0);
zxid_set_tas3_status(cf, ses, 0);
if (cf->valid_opt & ZXID_VALID_OPT_SKIP_RESP_HDR) {
ERR("WARNING! Important response security validations disabled by VALID_OPT=0x%x", cf->valid_opt);
return 1;
}
if (!env) {
ERR("No <e:Envelope> found. enve(%s)", STRNULLCHK(enve));
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Server", "No SOAP Envelope found.", "IDStarMsgNotUnderstood", 0, 0, 0));
return 0;
}
hdr = env->Header;
if (!hdr) {
ERR("No <e:Header> found. %d", 0);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Server", "No SOAP Header found.", "IDStarMsgNotUnderstood", 0, 0, 0));
return 0;
}
if (!ZX_SIMPLE_ELEM_CHK(hdr->MessageID)) {
ERR("No <a:MessageID> found. %d", 0);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Server", "No MessageID header found.", "IDStarMsgNotUnderstood", 0, 0, 0));
return 0;
}
relto = ZX_GET_CONTENT(hdr->RelatesTo);
if (relto && relto->len) {
if (ses->wsc_msgid) {
if (strlen(ses->wsc_msgid) == relto->len
&& !memcmp(ses->wsc_msgid, relto->s, relto->len)) {
D("RelatesTo check OK %d",1);
} else {
/* N.B. [SOAPBinding2] p.27, ll.818-822 indicates RelatesTo checking as SHOULD. */
if (cf->relto_fatal) {
ERR("<a:RelatesTo> (%.*s) does not match request msgid(%s).", relto->len, relto->s, ses->wsc_msgid);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Server", "RelatesTo in response does not match request MessageID.", "InvalidRefToMsgID", 0, 0, 0));
return 0;
} else {
INFO("<a:RelatesTo> (%.*s) does not match request msgid(%s), but configured to ignore this error (RELTO_FATAL=0).", relto->len, relto->s, ses->wsc_msgid);
}
}
} else {
INFO("Session does not have wsc_msgid. Skipping <a:RelatesTo> check. %d",0);
}
} else {
if (cf->relto_fatal) {
ERR("No <a:RelatesTo> found. %d", 0);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Server", "No RelatesTo header found in reply.", "IDStarMsgNotUnderstood", 0, 0, 0));
return 0;
} else {
INFO("No <a:RelatesTo> found, but configured to ignore this (RELTO_FATAL=0). %d", 0);
D("No RelTo OK enve(%s)", STRNULLCHK(enve));
}
}
if (!hdr->Sender || !hdr->Sender->providerID && !hdr->Sender->affiliationID) {
ERR("No <b:Sender> found (or missing providerID or affiliationID). %p", hdr->Sender);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Server", "No b:Sender header found (or missing providerID or affiliationID).", "IDStarMsgNotUnderstood", 0, 0, 0));
return 0;
}
issuer = &hdr->Sender->providerID->g;
/* Validate message signature (*** add Issuer trusted check, CA validation, etc.) */
if (!(sec = hdr->Security)) {
ERR("No <wsse:Security> found. %d", 0);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Server", "No wsse:Security header found.", "IDStarMsgNotUnderstood", 0, 0, 0));
return 0;
}
wsc_meta = zxid_get_ent_ss(cf, issuer);
if (!wsc_meta) {
ses->sigres = ZXSIG_NO_SIG;
if (cf->nosig_fatal) {
INFO("Unable to find SAML metadata for Sender(%.*s), but configured to ignore this problem (NOSIG_FATAL=0).", issuer->len, issuer->s);
} else {
ERR("Unable to find SAML metadata for Sender(%.*s).", issuer->len, issuer->s);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Server", "No unable to find SAML metadata for sender.", "ProviderIDNotValid", 0, 0, 0));
return 0;
}
}
if (!sec->Signature || !sec->Signature->SignedInfo || !sec->Signature->SignedInfo->Reference) {
ses->sigres = ZXSIG_NO_SIG;
if (cf->wsp_nosig_fatal) {
ERR("No Security/Signature found. %p", sec->Signature);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Server", "No wsse:Security/ds:Signature found.", TAS3_STATUS_NOSIG, 0, 0, 0));
return 0;
} else {
INFO("No Security/Signature found, but configured to ignore this problem (WSP_NOSIG_FATAL=0). %p", sec->Signature);
}
} else {
ZERO(refs, sizeof(refs));
n_refs = zxid_hunt_sig_parts(cf, n_refs, refs, sec->Signature->SignedInfo->Reference, hdr, env->Body);
/* *** Consider adding BDY and STR */
ses->sigres = zxsig_validate(cf->ctx, wsc_meta?wsc_meta->sign_cert:0, sec->Signature, n_refs, refs);
zxid_sigres_map(ses->sigres, &cgi.sigval, &cgi.sigmsg);
if (cf->sig_fatal && ses->sigres) {
ERR("Fail due to failed message signature sigres=%d", ses->sigres);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Server", "Message signature did not validate.", TAS3_STATUS_BADSIG, 0, 0, 0));
return 0;
}
}
if (!zxid_timestamp_chk(cf, ses, sec->Timestamp, &ourts, &srcts, TAS3_PEP_RS_IN, "e:Server"))
return 0;
if (hdr->UsageDirective) {
if (hdr->UsageDirective->Obligation && ZX_GET_CONTENT(hdr->UsageDirective->Obligation->AttributeAssignment)) {
ses->rcvd_usagedir = zx_str_to_c(cf->ctx, ZX_GET_CONTENT(hdr->UsageDirective->Obligation->AttributeAssignment));
D("Found TAS3 UsageDirective with obligation(%s)", ses->rcvd_usagedir);
} else if (ZX_GET_CONTENT(hdr->UsageDirective)) {
ses->rcvd_usagedir = zx_str_to_c(cf->ctx, ZX_GET_CONTENT(hdr->UsageDirective));
D("Found unknown UsageDirective(%s)", ses->rcvd_usagedir);
} else {
ERR("UsageDirective empty or not understood. %p", hdr->UsageDirective->Dict);
}
}
zxid_ses_to_pool(cf, ses);
zxid_snarf_eprs_from_ses(cf, ses); /* Harvest attributes and bootstrap(s) */
if (hdr->Status && hdr->Status->code
&& (hdr->Status->code->g.len != 2
|| hdr->Status->code->g.s[0] != 'O'
|| hdr->Status->code->g.s[1] != 'K')) {
ERR("TAS3 or app level error code(%.*s)", hdr->Status->code->g.len, hdr->Status->code->g.s);
return 0;
}
/* Call Rs-In PDP */
if (!zxid_localpdp(cf, ses)) {
ERR("RSIN4 Deny by local PDP %d",0);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Client", "Response denied by WSC local policy", TAS3_STATUS_DENY, 0, 0, 0));
return 0;
} else if (cf->pdp_url && *cf->pdp_url) {
//zxid_add_attr_to_pool(cf, ses, "Action", zx_dup_str(cf->ctx, "access"));
if (!zxid_pep_az_soap_pepmap(cf, 0, ses, cf->pdp_url, cf->pepmap_rsin)) {
ERR("RSIN4 Deny %d", 0);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Client", "Response denied by WSC policy at PDP", TAS3_STATUS_DENY, 0, 0, 0));
return 0;
}
}
/* *** execute (or store for future execution) the obligations. */
ss.s = (char*)enve;
ss.len = strlen(enve);
logpath = zxlog_path(cf, issuer, ZX_GET_CONTENT(hdr->MessageID),
ZXLOG_RELY_DIR, ZXLOG_MSG_KIND, 1);
if (zxlog_dup_check(cf, logpath, "validate response")) {
if (cf->dup_msg_fatal) {
zxlog_blob(cf, cf->log_rely_msg, logpath, &ss, "validate response dup err");
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_IN, "e:Server", "Duplicate Message.", "DuplicateMsg", 0, 0, 0));
return 0;
} else {
INFO("Duplicate message detected, but configured to ignore this (DUP_MSG_FATAL=0). %d",0);
}
}
zxlog_blob(cf, cf->log_rely_msg, logpath, &ss, "validate response");
zxlog(cf, &ourts, &srcts, 0, issuer, 0, ses->a7n?&ses->a7n->ID->g:0, ZX_GET_CONTENT(ses->nameid), "N", "K", "VALID", logpath->s, 0);
return 1;
}
/*() Prepare some headers for WSC call */
/* Called by: zxid_wsc_call */
static int zxid_wsc_prep(zxid_conf* cf, zxid_ses* ses, zxid_epr* epr, struct zx_e_Envelope_s* env)
{
zxid_tok* tok;
struct zx_e_Header_s* hdr;
if (!zxid_wsf_decor(cf, ses, env, 0))
return 0;
hdr = env->Header;
if (ses->call_tgttok || ses->call_invoktok && epr && epr->Metadata && epr->Metadata->SecurityContext && epr->Metadata->SecurityContext->Token) {
if (ses->call_tgttok) {
D("TargetIdentity: Explicit specification of ses->call_tgttok %d",0);
tok = ses->call_tgttok;
} else {
D("TargetIdentity: Using token from EPR due to specification of ses->call_invoktok %d",0);
tok = epr->Metadata->SecurityContext->Token;
}
hdr->TargetIdentity = zx_NEW_b_TargetIdentity(cf->ctx, &hdr->gg);
hdr->TargetIdentity->mustUnderstand = zx_ref_attr(cf->ctx, &hdr->TargetIdentity->gg, zx_e_mustUnderstand_ATTR, XML_TRUE);
hdr->TargetIdentity->actor = zx_ref_attr(cf->ctx, &hdr->TargetIdentity->gg, zx_e_actor_ATTR, SOAP_ACTOR_NEXT);
if (tok->EncryptedAssertion) {
ZX_ADD_KID(hdr->TargetIdentity, EncryptedAssertion, tok->EncryptedAssertion);
} else if (tok->Assertion) {
ZX_ADD_KID(hdr->TargetIdentity, Assertion, tok->Assertion);
} else {
ERR("No <sa:EncryptedAssertion> or <sa:Assertion> found in <sec:Token> %p", tok);
}
} /* else this is just implied by the sec mech */
#if 1
/* Mandatory for a request. */
hdr->ReplyTo = zx_NEW_a_ReplyTo(cf->ctx, &hdr->gg);
/*hdr->ReplyTo->Address = zxid_mk_addr(cf, zx_strf(cf->ctx, "%s?o=P", cf->url));*/
hdr->ReplyTo->Address = zxid_mk_addr(cf, &hdr->ReplyTo->gg, zx_dup_str(cf->ctx, A_ANON));
hdr->ReplyTo->mustUnderstand = zx_ref_attr(cf->ctx, &hdr->ReplyTo->gg, zx_e_mustUnderstand_ATTR, XML_TRUE);
hdr->ReplyTo->actor = zx_ref_attr(cf->ctx, &hdr->ReplyTo->gg, zx_e_actor_ATTR, SOAP_ACTOR_NEXT);
#endif
hdr->To = zx_NEW_a_To(cf->ctx, &hdr->gg);
zx_add_content(cf->ctx, &hdr->To->gg, ZX_GET_CONTENT(epr->Address));
hdr->To->mustUnderstand = zx_ref_attr(cf->ctx, &hdr->To->gg, zx_e_mustUnderstand_ATTR,XML_TRUE);
hdr->To->actor = zx_ref_attr(cf->ctx, &hdr->To->gg, zx_e_actor_ATTR, SOAP_ACTOR_NEXT);
#if 0
/* Omission means to use same address as ReplyTo */
hdr->FaultTo = zx_NEW_a_FaultTo(cf->ctx, &hdr->gg);
hdr->FaultTo->Address = zx_mk_addr(cf->ctx, &hdr->FaultTo->gg, zx_strf(cf->ctx, "%s?o=P", cf->url));
hdr->FaultTo->mustUnderstand = zx_ref_attr(cf->ctx, &hdr->FaultTo->gg, zx_e_mustUnderstand_ATTR, XML_TRUE);
hdr->FaultTo->actor = zx_ref_attr(cf->ctx, &hdr->FaultTo->gg, zx_e_actor_ATTR, SOAP_ACTOR_NEXT);
#endif
zxid_attach_sol1_usage_directive(cf, ses, env, TAS3_PLEDGE, cf->wsc_localpdp_obl_pledge);
zx_reverse_elem_lists(&hdr->gg);
return 1;
}
/* Called by: zxid_wsc_prep_secmech x2 */
static void zxid_choose_sectok(zxid_conf* cf, zxid_ses* ses, zxid_epr* epr, struct zx_wsse_Security_s* sec)
{
zxid_tok* tok;
if (ses->call_invoktok) {
D("Security Token: Explicit specification of ses->call_invoktok %d",0);
tok = ses->call_invoktok;
} else {
if (epr && epr->Metadata && epr->Metadata->SecurityContext && epr->Metadata->SecurityContext->Token) {
D("Security Token: Using token from EPR Metadata %d",0);
tok = epr->Metadata->SecurityContext->Token;
} else {
ERR("Security Token: No SecurityContext in EPR Metadata %p",epr);
return;
}
}
if (tok->EncryptedAssertion) {
sec->EncryptedAssertion = tok->EncryptedAssertion;
zx_add_kid_before(&sec->gg, zx_wsu_Timestamp_ELEM, &sec->EncryptedAssertion->gg);
} else if (tok->Assertion) {
sec->Assertion = tok->Assertion;
zx_add_kid_before(&sec->gg, zx_wsu_Timestamp_ELEM, &sec->Assertion->gg);
} else
ERR("No <sa:EncryptedAssertion> or <sa:Assertion> found in <sec:Token> %p", tok);
}
/*() Perform security mechanism related processing for a WSC call */
/* Called by: zxid_wsc_call */
static int zxid_wsc_prep_secmech(zxid_conf* cf, zxid_ses* ses, zxid_epr* epr, struct zx_e_Envelope_s* env)
{
int secmech;
struct zx_wsse_Security_s* sec;
struct zx_wsse_SecurityTokenReference_s* str;
struct zx_e_Header_s* hdr;
if (!epr || !env) {
ERR("MUST supply epr %p and envelope as arguments", epr);
return 0;
}
hdr = env->Header;
zx_add_content(cf->ctx, &hdr->MessageID->gg, zxid_mk_id(cf, "urn:M", ZXID_ID_BITS));
sec = hdr->Security;
if (!sec || !sec->Timestamp || !sec->Timestamp->Created) {
ERR("MUST supply wsse:Security and Timestamp %p", sec);
return 0;
}
zx_add_content(cf->ctx, &sec->Timestamp->Created->gg, zxid_date_time(cf, time(0)));
/* Clear away any credentials from previous iteration, if any. *** clear kids list, too */
sec->Signature = 0;
sec->BinarySecurityToken = 0;
sec->SecurityTokenReference = 0;
sec->Assertion = 0;
sec->EncryptedAssertion = 0;
sec->sa11_Assertion = 0;
sec->ff12_Assertion = 0;
/* Sign all Headers that have Id set. See wsc_sign_sec_mech() */
secmech = zxid_map_sec_mech(epr);
switch (secmech) {
case ZXID_SEC_MECH_NULL:
D("secmech null %d", secmech);
break;
case ZXID_SEC_MECH_BEARER:
zxid_choose_sectok(cf, ses, epr, sec);
str = sec->SecurityTokenReference = zx_NEW_wsse_SecurityTokenReference(cf->ctx, 0);
zx_add_kid_before(&sec->gg, zx_wsu_Timestamp_ELEM, &str->gg);
str->KeyIdentifier = zx_NEW_wsse_KeyIdentifier(cf->ctx, &str->gg);
str->KeyIdentifier->ValueType = zx_ref_attr(cf->ctx, &str->KeyIdentifier->gg, zx_ValueType_ATTR, SAMLID_TOK_PROFILE);
if (sec->Assertion)
zx_add_content(cf->ctx, &str->KeyIdentifier->gg, &sec->Assertion->ID->g);
/* *** In case of encrypted assertion, how is the KeyIdentifier populated? */
zxid_wsf_sign(cf, cf->wsc_sign, sec, str, hdr, env->Body);
D("secmech bearer %d", secmech);
break;
case ZXID_SEC_MECH_SAML:
zxid_choose_sectok(cf, ses, epr, sec);
/* *** Sign SEC, MID, TO, ACT (if any) */
zxid_wsf_sign(cf, cf->wsc_sign, sec, 0, hdr, env->Body);
D("secmech saml hok %d", secmech);
break;
case ZXID_SEC_MECH_X509:
/* *** Sign SEC, MID, TO, ACT (if any) */
zxid_wsf_sign(cf, cf->wsc_sign, sec, 0, hdr, env->Body);
D("secmech x509 %d", secmech);
break;
case ZXID_SEC_MECH_PEERS:
/* *** ? */
D("secmech peers %d", secmech);
break;
default:
ERR("Unknown secmech %d", secmech);
return 0;
}
return 1;
}
/*(i) zxid_wsc_call() implements the main low level ID-WSF web service call
* logic, including preparation of SOAP headers, use of sec mech (e.g.
* preparation of wsse:Security header and signing of appropriate components
* of the message), and sequencing of the call. In particular, it is
* possible that WSP requests user interaction and thus the caller web
* application will need to perform a redirect and then later call this
* function again to continue the web service call after interaction.
*
* env (rather than Body) is taken as argument so that caller can prepare
* additional SOAP headers at will before calling this function. This function
* will add Liberty ID-WSF specific SOAP headers. */
/* Called by: main x9, zxid_call_epr, zxid_get_epr, zxid_map_identity_token, zxid_nidmap_identity_token */
struct zx_e_Envelope_s* zxid_wsc_call(zxid_conf* cf, zxid_ses* ses, zxid_epr* epr, struct zx_e_Envelope_s* env, char** ret_enve)
{
int i, res;
struct zx_str* code;
struct zx_str* str;
struct zx_str* actor;
struct zx_root_s* root;
struct zx_e_Fault_s* flt;
D_INDENT("wsc_call: ");
if (!zxid_wsc_prep(cf, ses, epr, env)) {
D_DEDENT("wsc_call: ");
return 0;
}
for (i=0; i < cf->max_soap_retry; ++i) {
if (!zxid_wsc_prep_secmech(cf, ses, epr, env)) {
D_DEDENT("wsc_call: ");
return 0;
}
ses->wsc_msgid = zx_str_to_c(cf->ctx, ZX_GET_CONTENT(env->Header->MessageID));
root = zxid_soap_call_raw(cf, ZX_GET_CONTENT(epr->Address), env, ret_enve);
if (!root || !root->Envelope || !root->Envelope->Body) {
ERR("soap call returned empty or seriously flawed response %p", root);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RS_PARSE, "e:Server", "Server sent empty or invalid reply. SOAP Envelope or Body can not be found.", 0, 0, 0, 0));
D_DEDENT("wsc_call: ");
return 0;
}
flt = root->Envelope->Body->Fault;
if (flt) {
code = ZX_GET_CONTENT(flt->faultcode);
str = ZX_GET_CONTENT(flt->faultstring);
actor = ZX_GET_CONTENT(flt->faultactor);
D("SOAP Fault(%.*s) string(%.*s) actor(%.*s)", code?code->len:1, code?code->s:"?", str?str->len:1, str?str->s:"?", actor?actor->len:1, actor?actor->s:"?");
zxid_set_fault(cf, ses, zxid_mk_fault_zx_str(cf, 0, zx_dup_str(cf->ctx,TAS3_PEP_RS_VAL), code?code:zx_dup_str(cf->ctx,"e:Server"), str));
D_DEDENT("wsc_call: ");
return 0;
}
//res = zxid_wsf_analyze_result_headers(cf, ret); // detect, e.g., redirect
res = ZXID_OK;
switch (res) {
case ZXID_OK:
D_DEDENT("wsc_call: ");
return root->Envelope;
#if 0
case ZXID_NEW_CRED:
break;
case ZXID_EP_MOVE: // ***
break;
case ZXID_EP_UPDATE:
break;
#endif
case ZXID_REDIR_OK:
D("Redirection requested (e.g. Interaction Service) %d", 0);
D_DEDENT("wsc_call: ");
return (void*)ZXID_REDIR_OK;
default:
ERR("Unknown result code: %d", res);
D_DEDENT("wsc_call: ");
return 0;
}
}
ERR("Number of soap call retries exhausted max_soap_retry=%d", cf->max_soap_retry);
D_DEDENT("wsc_call: ");
return 0;
}
static char zx_env_body_open[] = "<e:Envelope xmlns:e=\""zx_xmlns_e"\"><e:Header></e:Header><e:Body>";
static char zx_env_body_close[] = "</e:Body></e:Envelope>";
#if 0
static char zx_env_open[] = "<e:Envelope xmlns:e=\""zx_xmlns_e"\"><e:Header></e:Header>";
static char zx_env_close[] = "</e:Envelope>";
#endif
/*() Convenience helper function to parse SOAP Envelope input string.
* If the specified envelope is incomplete, it is completed.
*
* If the string starts by "<e:Envelope", then string
* should be a complete SOAP envelope including <e:Header> and <e:Body> parts.
* If the string starts by "<e:Body", then the <e:Envelope> and <e:Header> are
* automatically added. If the string starts by neither of the above (be
* careful to use the "e:" as namespace prefix), then it is assumed to be the
* payload content of the <e:Body> and the rest of the SOAP envelope is added.
*/
/* Called by: zxid_call_epr, zxid_wsc_prepare_call, zxid_wsc_valid_resp, zxid_wsp_decorate */
struct zx_e_Envelope_s* zxid_add_env_if_needed(zxid_conf* cf, const char* enve)
{
struct zx_e_Envelope_s* env;
struct zx_root_s* r;
r = zx_dec_zx_root(cf->ctx, strlen(enve), enve, "add_env");
if (!r) {
ERR("Malformed XML enve(%s)", enve);
return 0;
}
env = r->Envelope;
if (env) {
if (!env->Body)
env->Body = zx_NEW_e_Body(cf->ctx, &env->gg);
if (!env->Header)
env->Header = zx_NEW_e_Header(cf->ctx, &env->gg);
} else if (r->Body) {
env = zx_NEW_e_Envelope(cf->ctx,0);
ZX_ADD_KID(env, Body, r->Body);
if (r->Header)
ZX_ADD_KID(env, Header, r->Header);
else
env->Header = zx_NEW_e_Header(cf->ctx, &env->gg);
} else { /* Resort to stringwise attempt to add envelope. */
ZX_FREE(cf->ctx, r);
if (!memcmp(enve, "<?xml ", sizeof("<?xml ")-1)) { /* Ignore common, but unnecessary decl. */
for (enve += sizeof("<?xml "); *enve && !(enve[0] == '?' && enve[1] == '>'); ++enve) ;
if (*enve)
enve += 2;
}
/* Must be just payload */
enve = zx_alloc_sprintf(cf->ctx, 0, "%s%s%s", zx_env_body_open, enve, zx_env_body_close);
r = zx_dec_zx_root(cf->ctx, strlen(enve), enve, "add_env2");
if (!r) {
ERR("Malformed XML enve(%s)", enve);
return 0;
}
env = r->Envelope;
}
ZX_FREE(cf->ctx, r);
if (!env)
ERR("No <e:Envelope> found in input argument. enve(%s)", enve);
return env;
}
/* ----------------------------------------
* Simplify writing WSCs */
/*() Make a SOAP call given XML payload for SOAP <e:Envelope> or <e:Body> content,
* specified by the string. Assumes the EPR has already been discovered.
* This is sometimes useful in prediscovered or delegated use cases, but
* normally you should be using zxid_call() and let the discovery
* take its course. */
/* Called by: zxid_call, zxid_callf_epr */
struct zx_str* zxid_call_epr(zxid_conf* cf, zxid_ses* ses, zxid_epr* epr, const char* az_cred, const char* enve)
{
char* ret_enve;
struct zx_str* ret;
struct zx_e_Envelope_s* env;
if (!cf || !ses || !enve) {
ERR("Missing mandatory arguments ses=%p enve=%p (programmer error)", ses, enve);
return 0;
}
D_INDENT("call: ");
env = zxid_add_env_if_needed(cf, enve);
if (!env) {
D_DEDENT("call: ");
return 0;
}
/* Call Rq-Out PDP */
if (!zxid_localpdp(cf, ses)) {
ERR("RQOUT1 Deny by local PDP %d",0);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RQ_OUT, "e:Client", "Request denied by WSC local policy", TAS3_STATUS_DENY, 0, 0, 0));
D_DEDENT("call: ");
return 0;
} else if (cf->pdp_url && *cf->pdp_url) {
//zxid_add_attr_to_pool(cf, ses, "Action", zx_dup_str(cf->ctx, "access"));
if (!zxid_pep_az_soap_pepmap(cf, 0, ses, cf->pdp_url, cf->pepmap_rqout)) {
ERR("RQOUT1 Deny %d", 0);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RQ_OUT, "e:Client", "Request denied by WSC policy", TAS3_STATUS_DENY, 0, 0, 0));
D_DEDENT("call: ");
return 0;
}
}
/* *** add usage directives */
env = zxid_wsc_call(cf, ses, epr, env, &ret_enve);
if (!env) {
ERR("Parsing return value failed %p", env);
D("ret_enve(%s) len=%d", ret_enve, (int)strlen(ret_enve));
D_DEDENT("call: ");
if (cf->valid_opt & ZXID_VALID_OPT_SKIP_RESP_HDR) {
ERR("WARNING! Important response security validations disabled by VALID_OPT=0x%x AND Fault occured or parsing return value failed. Pretending success anyway.", cf->valid_opt);
return zx_dup_str(cf->ctx, ret_enve);
}
return 0;
}
if (zxid_wsc_valid_re_env(cf, ses, az_cred, env, ret_enve) != 1) {
D_DEDENT("call: ");
return 0;
}
ret = zx_easy_enc_elem_opt(cf, &env->gg);
D_DEDENT("call: ");
return ret;
}
/*() Call web service, printf style. See zxid_call() for more documentation.
* Normally you should be calling zxid_callf() instead. */
/* Called by: */
struct zx_str* zxid_callf_epr(zxid_conf* cf, zxid_ses* ses, zxid_epr* epr, const char* az_cred, const char* env_f, ...)
{
char* s;
va_list ap;
va_start(ap, env_f);
s = zx_alloc_vasprintf(cf->ctx, 0, env_f, ap);
va_end(ap);
return zxid_call_epr(cf, ses, epr, az_cred, s);
}
/*(i) Make a SOAP call given XML payload for SOAP <e:Envelope> or <e:Body> content,
* specified by the string. This is your WSC work horse for calling almost any kind
* of web service. Simple and intuitive specification of XML as string: no need
* to build complex data structures.
*
* If the string starts by "<e:Envelope", then string
* should be a complete SOAP envelope including <e:Header> and <e:Body> parts. This
* allows caller to specify custom SOAP headers, in addition to the ones
* that the underlying zxid_wsc_call() will add. Usually the payload service
* will be passed as the contents of the body. If the string starts by
* "<e:Body", then the <e:Envelope> and <e:Header> are automatically added. If
* the string starts by neither of the above (be careful to use the "e:" as
* namespace prefix), then it is assumed to be the payload content of the <e:Body>
* and the rest of the SOAP envelope is added.
*
* cf:: ZXID configuration object, see zxid_new_conf()
* ses:: Session object that contains the EPR cache
* svctype:: URI (often the namespace URI) specifying the kind of service we
* wish to call. Used for EPR lookup or discovery.
* url:: (Optional) If provided, this argument has to match either
* the ProviderID, EntityID, or actual service endpoint URL.
* di_opt:: (Optional) Additional discovery options for selecting the
* service, query string format
* az_cred:: (Optional) Additional authorization credentials or
* attributes, query string format. These credentials will be populated
* to the attribute pool in addition to the ones obtained from SSO and
* other sources. Then a PDP is called to get an authorization decision
* (as well as obligations we pledge to support). See also PEPMAP
* configuration option. This implementes generalized (application
* independent) Requestor Out and Requestor In PEPs. To implement
* application dependent PEP features you should call zxid_az() directly.
* env:: XML payload
* return:: SOAP Envelope of the response, as a string. You can parse this
* string to obtain all returned SOAP headers as well as the Body and its
* content. NULL on failure. ses->curflt and/or ses->curstatus contain
* more detailed error information. */
/* Called by: zxcall_main, zxid_callf */
struct zx_str* zxid_call(zxid_conf* cf, zxid_ses* ses, const char* svctype, const char* url, const char* di_opt, const char* az_cred, const char* enve)
{
zxid_epr* epr;
if (!cf || !ses) {
ERR("Missing mandatory arguments ses=%p (programmer error)", ses);
return 0;
}
epr = zxid_get_epr(cf, ses, svctype, url, di_opt, 0 /*Action*/, 1);
if (!epr) {
ERR("EPR could not be discovered for svctype(%s)", svctype);
return 0;
}
return zxid_call_epr(cf, ses, epr, az_cred, enve);
}
/*() Call web service, printf style. See zxid_call() for more documentation. */
/* Called by: main, zxid_di_query */
struct zx_str* zxid_callf(zxid_conf* cf, zxid_ses* ses, const char* svctype, const char* url, const char* di_opt, const char* az_cred, const char* env_f, ...)
{
char* s;
va_list ap;
va_start(ap, env_f);
s = zx_alloc_vasprintf(cf->ctx, 0, env_f, ap);
va_end(ap);
return zxid_call(cf, ses, svctype, url, di_opt, az_cred, s);
}
/*(i) Prepare a SOAP call given XML payload for SOAP <e:Envelope> or <e:Body> content,
* specified by the string. Usually you should use zxid_call(), but if you want
* to control the steps yourself or use your own http client, this function
* may be useful.
*
* If the string starts by "<e:Envelope", then string
* should be a complete SOAP envelope including <e:Header> and <e:Body> parts. This
* allows caller to specify custom SOAP headers, in addition to the ones
* that the underlying zxid_wsc_call() will add. Usually the payload service
* will be passed as the contents of the body. If the string starts by
* "<e:Body", then the <e:Envelope> and <e:Header> are automatically added. If
* the string starts by neither of the above (be careful to use the "e:" as
* namespace prefix), then it is assumed to be the payload content of the <e:Body>
* and the rest of the SOAP envelope is added.
*
* cf:: ZXID configuration object, see zxid_new_conf()
* ses:: Session object that contains the EPR cache
* epr:: End point to call. From zxid_get_epr().
* az_cred:: (Optional) Additional authorization credentials or
* attributes, query string format. These credentials will be populated
* to the attribute pool in addition to the ones obtained from SSO and
* other sources. Then a PDP is called to get an authorization decision
* (as well as obligations we pledge to support). See also PEPMAP
* configuration option. This implementes generalized (application
* independent) Requestor Out and Requestor In PEPs. To implement
* application dependent PEP features you should call zxid_az() directly.
* env:: XML payload as a string
* return:: SOAP Envelope ready to be sent to the WSP. You can pass this to HTTP client. */
/* Called by: ws_validations, zxid_wsc_prepare_callf */
struct zx_str* zxid_wsc_prepare_call(zxid_conf* cf, zxid_ses* ses, zxid_epr* epr, const char* az_cred, const char* enve)
{
struct zx_str* ret;
struct zx_e_Envelope_s* env;
if (!cf || !ses || !enve) {
ERR("Missing mandatory arguments ses=%p (programmer error)", ses);
return 0;
}
D_INDENT("prep: ");
env = zxid_add_env_if_needed(cf, enve);
if (!env) {
D_DEDENT("prep: ");
return 0;
}
//*** Needs thought and development
if (!zxid_wsc_prep(cf, ses, epr, env)) {
D_DEDENT("prep: ");
return 0;
}
if (!zxid_wsc_prep_secmech(cf, ses, epr, env)) {
D_DEDENT("prep: ");
return 0;
}
ses->wsc_msgid = zx_str_to_c(cf->ctx, ZX_GET_CONTENT(env->Header->MessageID));
/* Call Rq-Out PDP */
if (!zxid_localpdp(cf, ses)) {
ERR("RQOUT1 Deny by local PDP %d",0);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RQ_OUT, "e:Client", "Request denied by WSC local policy", TAS3_STATUS_DENY, 0, 0, 0));
D_DEDENT("prep: ");
return 0;
} else if (cf->pdp_url && *cf->pdp_url) {
//zxid_add_attr_to_pool(cf, ses, "Action", zx_dup_str(cf->ctx, "access"));
if (!zxid_pep_az_soap_pepmap(cf, 0, ses, cf->pdp_url, cf->pepmap_rqout)) {
ERR("RQOUT1 Deny %d", 0);
zxid_set_fault(cf, ses, zxid_mk_fault(cf, 0, TAS3_PEP_RQ_IN, "e:Client", "Request denied by WSC policy", TAS3_STATUS_DENY, 0, 0, 0));
D_DEDENT("prep: ");
return 0;
}
}
/* *** add usage directives */
ret = zx_easy_enc_elem_opt(cf, &env->gg);
D_DEDENT("prep: ");
return ret;
}
/*() Prepare a web service call, printf style.
* See zxid_wsc_prepare_call() for more documentation. */
/* Called by: */
struct zx_str* zxid_wsc_prepare_callf(zxid_conf* cf, zxid_ses* ses, zxid_epr* epr, const char* az_cred, const char* env_f, ...)
{
char* s;
va_list ap;
va_start(ap, env_f);
s = zx_alloc_vasprintf(cf->ctx, 0, env_f, ap);
va_end(ap);
return zxid_wsc_prepare_call(cf, ses, epr, az_cred, s);
}
/*(i) Validate a response to web service call. Return: 1=valid. */
/* Called by: ws_validations */
int zxid_wsc_valid_resp(zxid_conf* cf, zxid_ses* ses, const char* az_cred, const char* enve)
{
int ret;
struct zx_e_Envelope_s* env;
if (!cf || !ses || !enve) {
ERR("Missing mandatory arguments ses=%p enve=%p (programmer error)", ses, enve);
return 0;
}
D_INDENT("valid: ");
env = zxid_add_env_if_needed(cf, enve);
ret = zxid_wsc_valid_re_env(cf, ses, az_cred, env, enve);
D_DEDENT("valid: ");
return ret;
}
/* EOF -- zxidwsc.c */