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-rw-r--r--lib/openldap.c638
1 files changed, 638 insertions, 0 deletions
diff --git a/lib/openldap.c b/lib/openldap.c
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index 000000000..7010da6c2
--- /dev/null
+++ b/lib/openldap.c
@@ -0,0 +1,638 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2010, Howard Chu, <hyc@openldap.org>
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "setup.h"
+
+#if !defined(CURL_DISABLE_LDAP) && defined(USE_OPENLDAP)
+
+/*
+ * Notice that USE_OPENLDAP is only a source code selection switch. When
+ * libcurl is built with USE_OPENLDAP defined the libcurl source code that
+ * gets compiled is the code from openldap.c, otherwise the code that gets
+ * compiled is the code from ldap.c.
+ *
+ * When USE_OPENLDAP is defined a recent version of the OpenLDAP library
+ * might be required for compilation and runtime. In order to use ancient
+ * OpenLDAP library versions, USE_OPENLDAP shall not be defined.
+ */
+
+#include <ldap.h>
+
+#include "urldata.h"
+#include <curl/curl.h>
+#include "sendf.h"
+#include "sslgen.h"
+#include "transfer.h"
+#include "curl_ldap.h"
+#include "curl_memory.h"
+#include "curl_base64.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+#include "memdebug.h"
+
+#ifndef _LDAP_PVT_H
+extern int ldap_pvt_url_scheme2proto(const char *);
+extern int ldap_init_fd(ber_socket_t fd, int proto, const char *url, LDAP **ld);
+#endif
+
+static CURLcode ldap_setup(struct connectdata *conn);
+static CURLcode ldap_do(struct connectdata *conn, bool *done);
+static CURLcode ldap_done(struct connectdata *conn, CURLcode, bool);
+static CURLcode ldap_connect(struct connectdata *conn, bool *done);
+static CURLcode ldap_connecting(struct connectdata *conn, bool *done);
+static CURLcode ldap_disconnect(struct connectdata *conn, bool dead_connection);
+
+static Curl_recv ldap_recv;
+
+/*
+ * LDAP protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_ldap = {
+ "LDAP", /* scheme */
+ ldap_setup, /* setup_connection */
+ ldap_do, /* do_it */
+ ldap_done, /* done */
+ ZERO_NULL, /* do_more */
+ ldap_connect, /* connect_it */
+ ldap_connecting, /* connecting */
+ ZERO_NULL, /* doing */
+ ZERO_NULL, /* proto_getsock */
+ ZERO_NULL, /* doing_getsock */
+ ZERO_NULL, /* perform_getsock */
+ ldap_disconnect, /* disconnect */
+ PORT_LDAP, /* defport */
+ PROT_LDAP /* protocol */
+};
+
+#ifdef USE_SSL
+/*
+ * LDAPS protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_ldaps = {
+ "LDAPS", /* scheme */
+ ldap_setup, /* setup_connection */
+ ldap_do, /* do_it */
+ ldap_done, /* done */
+ ZERO_NULL, /* do_more */
+ ldap_connect, /* connect_it */
+ ldap_connecting, /* connecting */
+ ZERO_NULL, /* doing */
+ ZERO_NULL, /* proto_getsock */
+ ZERO_NULL, /* doing_getsock */
+ ZERO_NULL, /* perform_getsock */
+ ldap_disconnect, /* disconnect */
+ PORT_LDAPS, /* defport */
+ PROT_LDAP | PROT_SSL /* protocol */
+};
+#endif
+
+static const char *url_errs[] = {
+ "success",
+ "out of memory",
+ "bad parameter",
+ "unrecognized scheme",
+ "unbalanced delimiter",
+ "bad URL",
+ "bad host or port",
+ "bad or missing attributes",
+ "bad or missing scope",
+ "bad or missing filter",
+ "bad or missing extensions"
+};
+
+typedef struct ldapconninfo {
+ LDAP *ld;
+ Curl_recv *recv; /* for stacking SSL handler */
+ Curl_send *send;
+ int proto;
+ int msgid;
+ bool ssldone;
+ bool sslinst;
+ bool didbind;
+} ldapconninfo;
+
+typedef struct ldapreqinfo {
+ int msgid;
+ int nument;
+} ldapreqinfo;
+
+static CURLcode ldap_setup(struct connectdata *conn)
+{
+ ldapconninfo *li;
+ LDAPURLDesc *lud;
+ struct SessionHandle *data=conn->data;
+ int rc, proto;
+ CURLcode status;
+
+ rc = ldap_url_parse(data->change.url, &lud);
+ if (rc != LDAP_URL_SUCCESS) {
+ const char *msg = "url parsing problem";
+ status = CURLE_URL_MALFORMAT;
+ if (rc > LDAP_URL_SUCCESS && rc <= LDAP_URL_ERR_BADEXTS) {
+ if (rc == LDAP_URL_ERR_MEM)
+ status = CURLE_OUT_OF_MEMORY;
+ msg = url_errs[rc];
+ }
+ failf(conn->data, "LDAP local: %s", msg);
+ return status;
+ }
+ proto = ldap_pvt_url_scheme2proto(lud->lud_scheme);
+ ldap_free_urldesc(lud);
+
+ li = calloc(1, sizeof(ldapconninfo));
+ li->proto = proto;
+ conn->proto.generic = li;
+ conn->bits.close = FALSE;
+ /* TODO:
+ * - provide option to choose SASL Binds instead of Simple
+ */
+ return CURLE_OK;
+}
+
+#ifdef USE_SSL
+static Sockbuf_IO ldapsb_tls;
+#endif
+
+static CURLcode ldap_connect(struct connectdata *conn, bool *done)
+{
+ ldapconninfo *li = conn->proto.generic;
+ struct SessionHandle *data=conn->data;
+ int rc, proto = LDAP_VERSION3;
+ char hosturl[1024], *ptr;
+
+ strcpy(hosturl, "ldap");
+ ptr = hosturl+4;
+ if (conn->protocol & PROT_SSL)
+ *ptr++ = 's';
+ snprintf(ptr, sizeof(hosturl)-(ptr-hosturl), "://%s:%d",
+ conn->host.name, conn->remote_port);
+
+ rc = ldap_init_fd(conn->sock[FIRSTSOCKET], li->proto, hosturl, &li->ld);
+ if (rc) {
+ failf(data, "LDAP local: Cannot connect to %s, %s",
+ hosturl, ldap_err2string(rc));
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ ldap_set_option(li->ld, LDAP_OPT_PROTOCOL_VERSION, &proto);
+
+#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_PROXY)
+ if(conn->bits.tunnel_proxy && conn->bits.httpproxy) {
+ /* for LDAP over HTTP proxy */
+ struct HTTP http_proxy;
+ ldapconninfo *li_save;
+ CURLcode result;
+
+ /* BLOCKING */
+ /* We want "seamless" LDAP operations through HTTP proxy tunnel */
+
+ /* Curl_proxyCONNECT is based on a pointer to a struct HTTP at the member
+ * conn->proto.http; we want LDAP through HTTP and we have to change the
+ * member temporarily for connecting to the HTTP proxy. After
+ * Curl_proxyCONNECT we have to set back the member to the original struct
+ * LDAP pointer
+ */
+ li_save = data->state.proto.generic;
+ memset(&http_proxy, 0, sizeof(http_proxy));
+ data->state.proto.http = &http_proxy;
+ result = Curl_proxyCONNECT(conn, FIRSTSOCKET,
+ conn->host.name, conn->remote_port);
+
+ data->state.proto.generic = li_save;
+
+ if(CURLE_OK != result)
+ return result;
+ }
+#endif /* !CURL_DISABLE_HTTP && !CURL_DISABLE_PROXY */
+
+#ifdef USE_SSL
+ if (conn->protocol & PROT_SSL) {
+ CURLcode res;
+ if (data->state.used_interface == Curl_if_easy) {
+ res = Curl_ssl_connect(conn, FIRSTSOCKET);
+ if (res)
+ return res;
+ li->ssldone = TRUE;
+ } else {
+ res = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &li->ssldone);
+ if (res)
+ return res;
+ }
+ }
+#endif
+
+ if (data->state.used_interface == Curl_if_easy)
+ return ldap_connecting(conn, done);
+
+ return CURLE_OK;
+}
+
+static CURLcode ldap_connecting(struct connectdata *conn, bool *done)
+{
+ ldapconninfo *li = conn->proto.generic;
+ struct SessionHandle *data=conn->data;
+ LDAPMessage *result = NULL;
+ struct timeval tv = {0,1}, *tvp;
+ int rc, err;
+ char *info = NULL;
+
+#ifdef USE_SSL
+ if (conn->protocol & PROT_SSL) {
+ /* Is the SSL handshake complete yet? */
+ if (!li->ssldone) {
+ CURLcode res = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &li->ssldone);
+ if (res || !li->ssldone)
+ return res;
+ }
+ /* Have we installed the libcurl SSL handlers into the sockbuf yet? */
+ if (!li->sslinst) {
+ Sockbuf *sb;
+ ldap_get_option(li->ld, LDAP_OPT_SOCKBUF, &sb);
+ ber_sockbuf_add_io(sb, &ldapsb_tls, LBER_SBIOD_LEVEL_TRANSPORT, conn);
+ li->sslinst = TRUE;
+ li->recv = conn->recv[FIRSTSOCKET];
+ li->send = conn->send[FIRSTSOCKET];
+ }
+ }
+#endif
+
+ if (data->state.used_interface == Curl_if_easy)
+ tvp = NULL; /* let ldap_result block indefinitely */
+ else
+ tvp = &tv;
+
+retry:
+ if (!li->didbind) {
+ char *binddn;
+ struct berval passwd;
+
+ if (conn->bits.user_passwd) {
+ binddn = conn->user;
+ passwd.bv_val = conn->passwd;
+ passwd.bv_len = strlen(passwd.bv_val);
+ } else {
+ binddn = NULL;
+ passwd.bv_val = NULL;
+ passwd.bv_len = 0;
+ }
+ rc = ldap_sasl_bind(li->ld, binddn, LDAP_SASL_SIMPLE, &passwd,
+ NULL, NULL, &li->msgid);
+ if (rc)
+ return CURLE_LDAP_CANNOT_BIND;
+ li->didbind = TRUE;
+ if (tvp)
+ return CURLE_OK;
+ }
+
+ rc = ldap_result(li->ld, li->msgid, LDAP_MSG_ONE, tvp, &result);
+ if (rc < 0) {
+ failf(data, "LDAP local: bind ldap_result %s", ldap_err2string(rc));
+ return CURLE_LDAP_CANNOT_BIND;
+ }
+ if (rc == 0) {
+ /* timed out */
+ return CURLE_OK;
+ }
+ rc = ldap_parse_result(li->ld, result, &err, NULL, &info, NULL, NULL, 1);
+ if (rc) {
+ failf(data, "LDAP local: bind ldap_parse_result %s", ldap_err2string(rc));
+ return CURLE_LDAP_CANNOT_BIND;
+ }
+ /* Try to fallback to LDAPv2? */
+ if (err == LDAP_PROTOCOL_ERROR) {
+ int proto;
+ ldap_get_option(li->ld, LDAP_OPT_PROTOCOL_VERSION, &proto);
+ if (proto == LDAP_VERSION3) {
+ ldap_memfree(info);
+ proto = LDAP_VERSION2;
+ ldap_set_option(li->ld, LDAP_OPT_PROTOCOL_VERSION, &proto);
+ li->didbind = FALSE;
+ goto retry;
+ }
+ }
+
+ if (err) {
+ failf(data, "LDAP remote: bind failed %s %s", ldap_err2string(rc),
+ info ? info : "");
+ return CURLE_LOGIN_DENIED;
+ }
+ conn->recv[FIRSTSOCKET] = ldap_recv;
+ *done = TRUE;
+ return CURLE_OK;
+}
+
+static CURLcode ldap_disconnect(struct connectdata *conn, bool dead_connection)
+{
+ ldapconninfo *li = conn->proto.generic;
+ (void) dead_connection;
+
+ if (li) {
+ if (li->ld) {
+ ldap_unbind_ext(li->ld, NULL, NULL);
+ li->ld = NULL;
+ }
+ conn->proto.generic = NULL;
+ free(li);
+ }
+ return CURLE_OK;
+}
+
+static CURLcode ldap_do(struct connectdata *conn, bool *done)
+{
+ ldapconninfo *li = conn->proto.generic;
+ ldapreqinfo *lr;
+ CURLcode status = CURLE_OK;
+ int rc = 0;
+ LDAPURLDesc *ludp = NULL;
+ int msgid;
+ struct SessionHandle *data=conn->data;
+
+ conn->bits.close = FALSE;
+
+ infof(data, "LDAP local: %s\n", data->change.url);
+
+ rc = ldap_url_parse(data->change.url, &ludp);
+ if (rc != LDAP_URL_SUCCESS) {
+ const char *msg = "url parsing problem";
+ status = CURLE_URL_MALFORMAT;
+ if (rc > LDAP_URL_SUCCESS && rc <= LDAP_URL_ERR_BADEXTS) {
+ if (rc == LDAP_URL_ERR_MEM)
+ status = CURLE_OUT_OF_MEMORY;
+ msg = url_errs[rc];
+ }
+ failf(conn->data, "LDAP local: %s", msg);
+ return status;
+ }
+
+ rc = ldap_search_ext(li->ld, ludp->lud_dn, ludp->lud_scope,
+ ludp->lud_filter, ludp->lud_attrs, 0,
+ NULL, NULL, NULL, 0, &msgid);
+ ldap_free_urldesc(ludp);
+ if (rc != LDAP_SUCCESS) {
+ failf(data, "LDAP local: ldap_search_ext %s", ldap_err2string(rc));
+ return CURLE_LDAP_SEARCH_FAILED;
+ }
+ lr = calloc(1,sizeof(ldapreqinfo));
+ lr->msgid = msgid;
+ data->state.proto.generic = lr;
+ Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE, NULL, -1, NULL);
+ *done = TRUE;
+ return CURLE_OK;
+}
+
+static CURLcode ldap_done(struct connectdata *conn, CURLcode res,
+ bool premature)
+{
+ ldapreqinfo *lr = conn->data->state.proto.generic;
+ (void)res;
+ (void)premature;
+
+ if (lr) {
+ /* if there was a search in progress, abandon it */
+ if (lr->msgid) {
+ ldapconninfo *li = conn->proto.generic;
+ ldap_abandon_ext(li->ld, lr->msgid, NULL, NULL);
+ lr->msgid = 0;
+ }
+ conn->data->state.proto.generic = NULL;
+ free(lr);
+ }
+ return CURLE_OK;
+}
+
+static ssize_t ldap_recv(struct connectdata *conn, int sockindex, char *buf,
+ size_t len, CURLcode *err)
+{
+ ldapconninfo *li = conn->proto.generic;
+ struct SessionHandle *data=conn->data;
+ ldapreqinfo *lr = data->state.proto.generic;
+ int rc, ret;
+ LDAPMessage *result = NULL;
+ LDAPMessage *ent;
+ BerElement *ber = NULL;
+ struct timeval tv = {0,1};
+ (void)len;
+ (void)buf;
+ (void)sockindex;
+
+ rc = ldap_result(li->ld, lr->msgid, LDAP_MSG_RECEIVED, &tv, &result);
+ if (rc < 0) {
+ failf(data, "LDAP local: search ldap_result %s", ldap_err2string(rc));
+ *err = CURLE_RECV_ERROR;
+ return -1;
+ }
+
+ *err = CURLE_AGAIN;
+ ret = -1;
+
+ /* timed out */
+ if (result == NULL)
+ return ret;
+
+ for (ent = ldap_first_message(li->ld, result); ent;
+ ent = ldap_next_message(li->ld, ent)) {
+ struct berval bv, *bvals, **bvp = &bvals;
+ int binary = 0, msgtype;
+
+ msgtype = ldap_msgtype(ent);
+ if (msgtype == LDAP_RES_SEARCH_RESULT) {
+ int code;
+ char *info = NULL;
+ rc = ldap_parse_result(li->ld, ent, &code, NULL, &info, NULL, NULL, 0);
+ if (rc) {
+ failf(data, "LDAP local: search ldap_parse_result %s", ldap_err2string(rc));
+ *err = CURLE_LDAP_SEARCH_FAILED;
+ } else if (code && code != LDAP_SIZELIMIT_EXCEEDED) {
+ failf(data, "LDAP remote: search failed %s %s", ldap_err2string(rc),
+ info ? info : "");
+ *err = CURLE_LDAP_SEARCH_FAILED;
+ } else {
+ /* successful */
+ if (code == LDAP_SIZELIMIT_EXCEEDED)
+ infof(data, "There are more than %d entries\n", lr->nument);
+ data->req.size = data->req.bytecount;
+ *err = CURLE_OK;
+ ret = 0;
+ }
+ lr->msgid = 0;
+ ldap_memfree(info);
+ break;
+ } else if (msgtype != LDAP_RES_SEARCH_ENTRY) {
+ continue;
+ }
+
+ lr->nument++;
+ rc = ldap_get_dn_ber(li->ld, ent, &ber, &bv);
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"DN: ", 4);
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)bv.bv_val, bv.bv_len);
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
+ data->req.bytecount += bv.bv_len + 5;
+
+ for (rc = ldap_get_attribute_ber(li->ld, ent, ber, &bv, bvp);
+ rc == LDAP_SUCCESS;
+ rc = ldap_get_attribute_ber(li->ld, ent, ber, &bv, bvp)) {
+ int i;
+
+ if (bv.bv_val == NULL) break;
+
+ if (bv.bv_len > 7 && !strncmp(bv.bv_val + bv.bv_len - 7, ";binary", 7))
+ binary = 1;
+ else
+ binary = 0;
+
+ for (i=0; bvals[i].bv_val != NULL; i++) {
+ int binval = 0;
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\t", 1);
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)bv.bv_val, bv.bv_len);
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)":", 1);
+ data->req.bytecount += bv.bv_len + 2;
+
+ if (!binary) {
+ /* check for leading or trailing whitespace */
+ if (ISSPACE(bvals[i].bv_val[0]) ||
+ ISSPACE(bvals[i].bv_val[bvals[i].bv_len-1])) {
+ binval = 1;
+ } else {
+ /* check for unprintable characters */
+ unsigned int j;
+ for (j=0; j<bvals[i].bv_len; j++)
+ if (!ISPRINT(bvals[i].bv_val[j])) {
+ binval = 1;
+ break;
+ }
+ }
+ }
+ if (binary || binval) {
+ char *val_b64;
+ /* Binary value, encode to base64. */
+ size_t val_b64_sz = Curl_base64_encode(data,
+ bvals[i].bv_val,
+ bvals[i].bv_len,
+ &val_b64);
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)": ", 2);
+ data->req.bytecount += 2;
+ if(val_b64_sz > 0) {
+ Curl_client_write(conn, CLIENTWRITE_BODY, val_b64, val_b64_sz);
+ free(val_b64);
+ data->req.bytecount += val_b64_sz;
+ }
+ } else {
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)" ", 1);
+ Curl_client_write(conn, CLIENTWRITE_BODY, bvals[i].bv_val,
+ bvals[i].bv_len);
+ data->req.bytecount += bvals[i].bv_len + 1;
+ }
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 0);
+ data->req.bytecount++;
+ }
+ ber_memfree(bvals);
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 0);
+ data->req.bytecount++;
+ }
+ Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 0);
+ data->req.bytecount++;
+ ber_free(ber, 0);
+ }
+ ldap_msgfree(result);
+ return ret;
+}
+
+#ifdef USE_SSL
+static int
+ldapsb_tls_setup(Sockbuf_IO_Desc *sbiod, void *arg)
+{
+ sbiod->sbiod_pvt = arg;
+ return 0;
+}
+
+static int
+ldapsb_tls_remove(Sockbuf_IO_Desc *sbiod)
+{
+ sbiod->sbiod_pvt = NULL;
+ return 0;
+}
+
+/* We don't need to do anything because libcurl does it already */
+static int
+ldapsb_tls_close(Sockbuf_IO_Desc *sbiod)
+{
+ (void)sbiod;
+ return 0;
+}
+
+static int
+ldapsb_tls_ctrl(Sockbuf_IO_Desc *sbiod, int opt, void *arg)
+{
+ (void)arg;
+ if (opt == LBER_SB_OPT_DATA_READY) {
+ struct connectdata *conn = sbiod->sbiod_pvt;
+ return Curl_ssl_data_pending(conn, FIRSTSOCKET);
+ }
+ return 0;
+}
+
+static ber_slen_t
+ldapsb_tls_read(Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
+{
+ struct connectdata *conn = sbiod->sbiod_pvt;
+ ldapconninfo *li = conn->proto.generic;
+ ber_slen_t ret;
+ CURLcode err = CURLE_RECV_ERROR;
+
+ ret = li->recv(conn, FIRSTSOCKET, buf, len, &err);
+ if (ret < 0 && err == CURLE_AGAIN) {
+ SET_SOCKERRNO(EWOULDBLOCK);
+ }
+ return ret;
+}
+
+static ber_slen_t
+ldapsb_tls_write(Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
+{
+ struct connectdata *conn = sbiod->sbiod_pvt;
+ ldapconninfo *li = conn->proto.generic;
+ ber_slen_t ret;
+ CURLcode err = CURLE_SEND_ERROR;
+
+ ret = li->send(conn, FIRSTSOCKET, buf, len, &err);
+ if (ret < 0 && err == CURLE_AGAIN) {
+ SET_SOCKERRNO(EWOULDBLOCK);
+ }
+ return ret;
+}
+
+static Sockbuf_IO ldapsb_tls =
+{
+ ldapsb_tls_setup,
+ ldapsb_tls_remove,
+ ldapsb_tls_ctrl,
+ ldapsb_tls_read,
+ ldapsb_tls_write,
+ ldapsb_tls_close
+};
+#endif /* USE_SSL */
+
+#endif /* !CURL_DISABLE_LDAP && USE_OPENLDAP */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 10:20:55 +0000