/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) Daniel Stenberg, , et al. * * 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 https://curl.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. * * SPDX-License-Identifier: curl * ***************************************************************************/ #include "curl_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. */ /* Wincrypt must be included before anything that could include OpenSSL. */ #if defined(USE_WIN32_CRYPTO) #include /* Undefine wincrypt conflicting symbols for BoringSSL. */ #undef X509_NAME #undef X509_EXTENSIONS #undef PKCS7_ISSUER_AND_SERIAL #undef PKCS7_SIGNER_INFO #undef OCSP_REQUEST #undef OCSP_RESPONSE #endif #ifdef USE_WIN32_LDAP /* Use Windows LDAP implementation. */ # include # ifndef LDAP_VENDOR_NAME # error Your Platform SDK is NOT sufficient for LDAP support! \ Update your Platform SDK, or disable LDAP support! # else # include # endif #else # define LDAP_DEPRECATED 1 /* Be sure ldap_init() is defined. */ # ifdef HAVE_LBER_H # include # endif # include # if (defined(HAVE_LDAP_SSL) && defined(HAVE_LDAP_SSL_H)) # include # endif /* HAVE_LDAP_SSL && HAVE_LDAP_SSL_H */ #endif #include "urldata.h" #include #include "sendf.h" #include "escape.h" #include "progress.h" #include "transfer.h" #include "strcase.h" #include "strtok.h" #include "curl_ldap.h" #include "curl_multibyte.h" #include "curl_base64.h" #include "connect.h" /* The last 3 #include files should be in this order */ #include "curl_printf.h" #include "curl_memory.h" #include "memdebug.h" #ifndef HAVE_LDAP_URL_PARSE /* Use our own implementation. */ struct ldap_urldesc { char *lud_host; int lud_port; #if defined(USE_WIN32_LDAP) TCHAR *lud_dn; TCHAR **lud_attrs; #else char *lud_dn; char **lud_attrs; #endif int lud_scope; #if defined(USE_WIN32_LDAP) TCHAR *lud_filter; #else char *lud_filter; #endif char **lud_exts; size_t lud_attrs_dups; /* how many were dup'ed, this field is not in the "real" struct so can only be used in code without HAVE_LDAP_URL_PARSE defined */ }; #undef LDAPURLDesc #define LDAPURLDesc struct ldap_urldesc static int _ldap_url_parse(struct Curl_easy *data, const struct connectdata *conn, LDAPURLDesc **ludp); static void _ldap_free_urldesc(LDAPURLDesc *ludp); #undef ldap_free_urldesc #define ldap_free_urldesc _ldap_free_urldesc #endif #ifdef DEBUG_LDAP #define LDAP_TRACE(x) do { \ _ldap_trace("%u: ", __LINE__); \ _ldap_trace x; \ } while(0) static void _ldap_trace(const char *fmt, ...); #else #define LDAP_TRACE(x) Curl_nop_stmt #endif #if defined(USE_WIN32_LDAP) && defined(ldap_err2string) /* Use ansi error strings in UNICODE builds */ #undef ldap_err2string #define ldap_err2string ldap_err2stringA #endif #if defined(USE_WIN32_LDAP) && defined(_MSC_VER) && (_MSC_VER <= 1600) /* Workaround for warning: 'type cast' : conversion from 'int' to 'void *' of greater size */ #undef LDAP_OPT_ON #undef LDAP_OPT_OFF #define LDAP_OPT_ON ((void *)(size_t)1) #define LDAP_OPT_OFF ((void *)(size_t)0) #endif static CURLcode ldap_do(struct Curl_easy *data, bool *done); /* * LDAP protocol handler. */ const struct Curl_handler Curl_handler_ldap = { "LDAP", /* scheme */ ZERO_NULL, /* setup_connection */ ldap_do, /* do_it */ ZERO_NULL, /* done */ ZERO_NULL, /* do_more */ ZERO_NULL, /* connect_it */ ZERO_NULL, /* connecting */ ZERO_NULL, /* doing */ ZERO_NULL, /* proto_getsock */ ZERO_NULL, /* doing_getsock */ ZERO_NULL, /* domore_getsock */ ZERO_NULL, /* perform_getsock */ ZERO_NULL, /* disconnect */ ZERO_NULL, /* readwrite */ ZERO_NULL, /* connection_check */ ZERO_NULL, /* attach connection */ PORT_LDAP, /* defport */ CURLPROTO_LDAP, /* protocol */ CURLPROTO_LDAP, /* family */ PROTOPT_NONE /* flags */ }; #ifdef HAVE_LDAP_SSL /* * LDAPS protocol handler. */ const struct Curl_handler Curl_handler_ldaps = { "LDAPS", /* scheme */ ZERO_NULL, /* setup_connection */ ldap_do, /* do_it */ ZERO_NULL, /* done */ ZERO_NULL, /* do_more */ ZERO_NULL, /* connect_it */ ZERO_NULL, /* connecting */ ZERO_NULL, /* doing */ ZERO_NULL, /* proto_getsock */ ZERO_NULL, /* doing_getsock */ ZERO_NULL, /* domore_getsock */ ZERO_NULL, /* perform_getsock */ ZERO_NULL, /* disconnect */ ZERO_NULL, /* readwrite */ ZERO_NULL, /* connection_check */ ZERO_NULL, /* attach connection */ PORT_LDAPS, /* defport */ CURLPROTO_LDAPS, /* protocol */ CURLPROTO_LDAP, /* family */ PROTOPT_SSL /* flags */ }; #endif #if defined(USE_WIN32_LDAP) #if defined(USE_WINDOWS_SSPI) static int ldap_win_bind_auth(LDAP *server, const char *user, const char *passwd, unsigned long authflags) { ULONG method = 0; SEC_WINNT_AUTH_IDENTITY cred; int rc = LDAP_AUTH_METHOD_NOT_SUPPORTED; memset(&cred, 0, sizeof(cred)); #if defined(USE_SPNEGO) if(authflags & CURLAUTH_NEGOTIATE) { method = LDAP_AUTH_NEGOTIATE; } else #endif #if defined(USE_NTLM) if(authflags & CURLAUTH_NTLM) { method = LDAP_AUTH_NTLM; } else #endif #if !defined(CURL_DISABLE_CRYPTO_AUTH) if(authflags & CURLAUTH_DIGEST) { method = LDAP_AUTH_DIGEST; } else #endif { /* required anyway if one of upper preprocessor definitions enabled */ } if(method && user && passwd) { rc = Curl_create_sspi_identity(user, passwd, &cred); if(!rc) { rc = ldap_bind_s(server, NULL, (TCHAR *)&cred, method); Curl_sspi_free_identity(&cred); } } else { /* proceed with current user credentials */ method = LDAP_AUTH_NEGOTIATE; rc = ldap_bind_s(server, NULL, NULL, method); } return rc; } #endif /* #if defined(USE_WINDOWS_SSPI) */ static int ldap_win_bind(struct Curl_easy *data, LDAP *server, const char *user, const char *passwd) { int rc = LDAP_INVALID_CREDENTIALS; PTCHAR inuser = NULL; PTCHAR inpass = NULL; if(user && passwd && (data->set.httpauth & CURLAUTH_BASIC)) { inuser = curlx_convert_UTF8_to_tchar((char *) user); inpass = curlx_convert_UTF8_to_tchar((char *) passwd); rc = ldap_simple_bind_s(server, inuser, inpass); curlx_unicodefree(inuser); curlx_unicodefree(inpass); } #if defined(USE_WINDOWS_SSPI) else { rc = ldap_win_bind_auth(server, user, passwd, data->set.httpauth); } #endif return rc; } #endif /* #if defined(USE_WIN32_LDAP) */ #if defined(USE_WIN32_LDAP) #define FREE_ON_WINLDAP(x) curlx_unicodefree(x) #else #define FREE_ON_WINLDAP(x) #endif static CURLcode ldap_do(struct Curl_easy *data, bool *done) { CURLcode result = CURLE_OK; int rc = 0; LDAP *server = NULL; LDAPURLDesc *ludp = NULL; LDAPMessage *ldapmsg = NULL; LDAPMessage *entryIterator; int num = 0; struct connectdata *conn = data->conn; int ldap_proto = LDAP_VERSION3; int ldap_ssl = 0; char *val_b64 = NULL; size_t val_b64_sz = 0; curl_off_t dlsize = 0; #ifdef LDAP_OPT_NETWORK_TIMEOUT struct timeval ldap_timeout = {10, 0}; /* 10 sec connection/search timeout */ #endif #if defined(USE_WIN32_LDAP) TCHAR *host = NULL; #else char *host = NULL; #endif char *user = NULL; char *passwd = NULL; *done = TRUE; /* unconditionally */ infof(data, "LDAP local: LDAP Vendor = %s ; LDAP Version = %d", LDAP_VENDOR_NAME, LDAP_VENDOR_VERSION); infof(data, "LDAP local: %s", data->state.url); #ifdef HAVE_LDAP_URL_PARSE rc = ldap_url_parse(data->state.url, &ludp); #else rc = _ldap_url_parse(data, conn, &ludp); #endif if(rc) { failf(data, "Bad LDAP URL: %s", ldap_err2string(rc)); result = CURLE_URL_MALFORMAT; goto quit; } /* Get the URL scheme (either ldap or ldaps) */ if(conn->given->flags & PROTOPT_SSL) ldap_ssl = 1; infof(data, "LDAP local: trying to establish %s connection", ldap_ssl ? "encrypted" : "cleartext"); #if defined(USE_WIN32_LDAP) host = curlx_convert_UTF8_to_tchar(conn->host.name); if(!host) { result = CURLE_OUT_OF_MEMORY; goto quit; } #else host = conn->host.name; #endif if(data->state.aptr.user) { user = conn->user; passwd = conn->passwd; } #ifdef LDAP_OPT_NETWORK_TIMEOUT ldap_set_option(NULL, LDAP_OPT_NETWORK_TIMEOUT, &ldap_timeout); #endif ldap_set_option(NULL, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto); if(ldap_ssl) { #ifdef HAVE_LDAP_SSL #ifdef USE_WIN32_LDAP /* Win32 LDAP SDK doesn't support insecure mode without CA! */ server = ldap_sslinit(host, conn->port, 1); ldap_set_option(server, LDAP_OPT_SSL, LDAP_OPT_ON); #else int ldap_option; char *ldap_ca = conn->ssl_config.CAfile; #if defined(CURL_HAS_NOVELL_LDAPSDK) rc = ldapssl_client_init(NULL, NULL); if(rc != LDAP_SUCCESS) { failf(data, "LDAP local: ldapssl_client_init %s", ldap_err2string(rc)); result = CURLE_SSL_CERTPROBLEM; goto quit; } if(conn->ssl_config.verifypeer) { /* Novell SDK supports DER or BASE64 files. */ int cert_type = LDAPSSL_CERT_FILETYPE_B64; if((data->set.ssl.cert_type) && (strcasecompare(data->set.ssl.cert_type, "DER"))) cert_type = LDAPSSL_CERT_FILETYPE_DER; if(!ldap_ca) { failf(data, "LDAP local: ERROR %s CA cert not set", (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM")); result = CURLE_SSL_CERTPROBLEM; goto quit; } infof(data, "LDAP local: using %s CA cert '%s'", (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"), ldap_ca); rc = ldapssl_add_trusted_cert(ldap_ca, cert_type); if(rc != LDAP_SUCCESS) { failf(data, "LDAP local: ERROR setting %s CA cert: %s", (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"), ldap_err2string(rc)); result = CURLE_SSL_CERTPROBLEM; goto quit; } ldap_option = LDAPSSL_VERIFY_SERVER; } else ldap_option = LDAPSSL_VERIFY_NONE; rc = ldapssl_set_verify_mode(ldap_option); if(rc != LDAP_SUCCESS) { failf(data, "LDAP local: ERROR setting cert verify mode: %s", ldap_err2string(rc)); result = CURLE_SSL_CERTPROBLEM; goto quit; } server = ldapssl_init(host, conn->port, 1); if(!server) { failf(data, "LDAP local: Cannot connect to %s:%u", conn->host.dispname, conn->port); result = CURLE_COULDNT_CONNECT; goto quit; } #elif defined(LDAP_OPT_X_TLS) if(conn->ssl_config.verifypeer) { /* OpenLDAP SDK supports BASE64 files. */ if((data->set.ssl.cert_type) && (!strcasecompare(data->set.ssl.cert_type, "PEM"))) { failf(data, "LDAP local: ERROR OpenLDAP only supports PEM cert-type"); result = CURLE_SSL_CERTPROBLEM; goto quit; } if(!ldap_ca) { failf(data, "LDAP local: ERROR PEM CA cert not set"); result = CURLE_SSL_CERTPROBLEM; goto quit; } infof(data, "LDAP local: using PEM CA cert: %s", ldap_ca); rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_CACERTFILE, ldap_ca); if(rc != LDAP_SUCCESS) { failf(data, "LDAP local: ERROR setting PEM CA cert: %s", ldap_err2string(rc)); result = CURLE_SSL_CERTPROBLEM; goto quit; } ldap_option = LDAP_OPT_X_TLS_DEMAND; } else ldap_option = LDAP_OPT_X_TLS_NEVER; rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &ldap_option); if(rc != LDAP_SUCCESS) { failf(data, "LDAP local: ERROR setting cert verify mode: %s", ldap_err2string(rc)); result = CURLE_SSL_CERTPROBLEM; goto quit; } server = ldap_init(host, conn->port); if(!server) { failf(data, "LDAP local: Cannot connect to %s:%u", conn->host.dispname, conn->port); result = CURLE_COULDNT_CONNECT; goto quit; } ldap_option = LDAP_OPT_X_TLS_HARD; rc = ldap_set_option(server, LDAP_OPT_X_TLS, &ldap_option); if(rc != LDAP_SUCCESS) { failf(data, "LDAP local: ERROR setting SSL/TLS mode: %s", ldap_err2string(rc)); result = CURLE_SSL_CERTPROBLEM; goto quit; } /* rc = ldap_start_tls_s(server, NULL, NULL); if(rc != LDAP_SUCCESS) { failf(data, "LDAP local: ERROR starting SSL/TLS mode: %s", ldap_err2string(rc)); result = CURLE_SSL_CERTPROBLEM; goto quit; } */ #else /* we should probably never come up to here since configure should check in first place if we can support LDAP SSL/TLS */ failf(data, "LDAP local: SSL/TLS not supported with this version " "of the OpenLDAP toolkit\n"); result = CURLE_SSL_CERTPROBLEM; goto quit; #endif #endif #endif /* CURL_LDAP_USE_SSL */ } else if(data->set.use_ssl > CURLUSESSL_TRY) { failf(data, "LDAP local: explicit TLS not supported"); result = CURLE_NOT_BUILT_IN; goto quit; } else { server = ldap_init(host, conn->port); if(!server) { failf(data, "LDAP local: Cannot connect to %s:%u", conn->host.dispname, conn->port); result = CURLE_COULDNT_CONNECT; goto quit; } } #ifdef USE_WIN32_LDAP ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto); rc = ldap_win_bind(data, server, user, passwd); #else rc = ldap_simple_bind_s(server, user, passwd); #endif if(!ldap_ssl && rc) { ldap_proto = LDAP_VERSION2; ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto); #ifdef USE_WIN32_LDAP rc = ldap_win_bind(data, server, user, passwd); #else rc = ldap_simple_bind_s(server, user, passwd); #endif } if(rc) { #ifdef USE_WIN32_LDAP failf(data, "LDAP local: bind via ldap_win_bind %s", ldap_err2string(rc)); #else failf(data, "LDAP local: bind via ldap_simple_bind_s %s", ldap_err2string(rc)); #endif result = CURLE_LDAP_CANNOT_BIND; goto quit; } rc = ldap_search_s(server, ludp->lud_dn, ludp->lud_scope, ludp->lud_filter, ludp->lud_attrs, 0, &ldapmsg); if(rc && rc != LDAP_SIZELIMIT_EXCEEDED) { failf(data, "LDAP remote: %s", ldap_err2string(rc)); result = CURLE_LDAP_SEARCH_FAILED; goto quit; } for(num = 0, entryIterator = ldap_first_entry(server, ldapmsg); entryIterator; entryIterator = ldap_next_entry(server, entryIterator), num++) { BerElement *ber = NULL; #if defined(USE_WIN32_LDAP) TCHAR *attribute; #else char *attribute; #endif int i; /* Get the DN and write it to the client */ { char *name; size_t name_len; #if defined(USE_WIN32_LDAP) TCHAR *dn = ldap_get_dn(server, entryIterator); name = curlx_convert_tchar_to_UTF8(dn); if(!name) { ldap_memfree(dn); result = CURLE_OUT_OF_MEMORY; goto quit; } #else char *dn = name = ldap_get_dn(server, entryIterator); #endif name_len = strlen(name); result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"DN: ", 4); if(result) { FREE_ON_WINLDAP(name); ldap_memfree(dn); goto quit; } result = Curl_client_write(data, CLIENTWRITE_BODY, name, name_len); if(result) { FREE_ON_WINLDAP(name); ldap_memfree(dn); goto quit; } result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1); if(result) { FREE_ON_WINLDAP(name); ldap_memfree(dn); goto quit; } dlsize += name_len + 5; FREE_ON_WINLDAP(name); ldap_memfree(dn); } /* Get the attributes and write them to the client */ for(attribute = ldap_first_attribute(server, entryIterator, &ber); attribute; attribute = ldap_next_attribute(server, entryIterator, ber)) { BerValue **vals; size_t attr_len; #if defined(USE_WIN32_LDAP) char *attr = curlx_convert_tchar_to_UTF8(attribute); if(!attr) { if(ber) ber_free(ber, 0); result = CURLE_OUT_OF_MEMORY; goto quit; } #else char *attr = attribute; #endif attr_len = strlen(attr); vals = ldap_get_values_len(server, entryIterator, attribute); if(vals) { for(i = 0; (vals[i] != NULL); i++) { result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\t", 1); if(result) { ldap_value_free_len(vals); FREE_ON_WINLDAP(attr); ldap_memfree(attribute); if(ber) ber_free(ber, 0); goto quit; } result = Curl_client_write(data, CLIENTWRITE_BODY, attr, attr_len); if(result) { ldap_value_free_len(vals); FREE_ON_WINLDAP(attr); ldap_memfree(attribute); if(ber) ber_free(ber, 0); goto quit; } result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)": ", 2); if(result) { ldap_value_free_len(vals); FREE_ON_WINLDAP(attr); ldap_memfree(attribute); if(ber) ber_free(ber, 0); goto quit; } dlsize += attr_len + 3; if((attr_len > 7) && (strcmp(";binary", attr + (attr_len - 7)) == 0)) { /* Binary attribute, encode to base64. */ result = Curl_base64_encode(vals[i]->bv_val, vals[i]->bv_len, &val_b64, &val_b64_sz); if(result) { ldap_value_free_len(vals); FREE_ON_WINLDAP(attr); ldap_memfree(attribute); if(ber) ber_free(ber, 0); goto quit; } if(val_b64_sz > 0) { result = Curl_client_write(data, CLIENTWRITE_BODY, val_b64, val_b64_sz); free(val_b64); if(result) { ldap_value_free_len(vals); FREE_ON_WINLDAP(attr); ldap_memfree(attribute); if(ber) ber_free(ber, 0); goto quit; } dlsize += val_b64_sz; } } else { result = Curl_client_write(data, CLIENTWRITE_BODY, vals[i]->bv_val, vals[i]->bv_len); if(result) { ldap_value_free_len(vals); FREE_ON_WINLDAP(attr); ldap_memfree(attribute); if(ber) ber_free(ber, 0); goto quit; } dlsize += vals[i]->bv_len; } result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1); if(result) { ldap_value_free_len(vals); FREE_ON_WINLDAP(attr); ldap_memfree(attribute); if(ber) ber_free(ber, 0); goto quit; } dlsize++; } /* Free memory used to store values */ ldap_value_free_len(vals); } /* Free the attribute as we are done with it */ FREE_ON_WINLDAP(attr); ldap_memfree(attribute); result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1); if(result) goto quit; dlsize++; Curl_pgrsSetDownloadCounter(data, dlsize); } if(ber) ber_free(ber, 0); } quit: if(ldapmsg) { ldap_msgfree(ldapmsg); LDAP_TRACE(("Received %d entries\n", num)); } if(rc == LDAP_SIZELIMIT_EXCEEDED) infof(data, "There are more than %d entries", num); if(ludp) ldap_free_urldesc(ludp); if(server) ldap_unbind_s(server); #if defined(HAVE_LDAP_SSL) && defined(CURL_HAS_NOVELL_LDAPSDK) if(ldap_ssl) ldapssl_client_deinit(); #endif /* HAVE_LDAP_SSL && CURL_HAS_NOVELL_LDAPSDK */ FREE_ON_WINLDAP(host); /* no data to transfer */ Curl_setup_transfer(data, -1, -1, FALSE, -1); connclose(conn, "LDAP connection always disable re-use"); return result; } #ifdef DEBUG_LDAP static void _ldap_trace(const char *fmt, ...) { static int do_trace = -1; va_list args; if(do_trace == -1) { const char *env = getenv("CURL_TRACE"); do_trace = (env && strtol(env, NULL, 10) > 0); } if(!do_trace) return; va_start(args, fmt); vfprintf(stderr, fmt, args); va_end(args); } #endif #ifndef HAVE_LDAP_URL_PARSE /* * Return scope-value for a scope-string. */ static int str2scope(const char *p) { if(strcasecompare(p, "one")) return LDAP_SCOPE_ONELEVEL; if(strcasecompare(p, "onetree")) return LDAP_SCOPE_ONELEVEL; if(strcasecompare(p, "base")) return LDAP_SCOPE_BASE; if(strcasecompare(p, "sub")) return LDAP_SCOPE_SUBTREE; if(strcasecompare(p, "subtree")) return LDAP_SCOPE_SUBTREE; return (-1); } /* * Split 'str' into strings separated by commas. * Note: out[] points into 'str'. */ static bool split_str(char *str, char ***out, size_t *count) { char **res; char *lasts; char *s; size_t i; size_t items = 1; s = strchr(str, ','); while(s) { items++; s = strchr(++s, ','); } res = calloc(items, sizeof(char *)); if(!res) return FALSE; for(i = 0, s = strtok_r(str, ",", &lasts); s && i < items; s = strtok_r(NULL, ",", &lasts), i++) res[i] = s; *out = res; *count = items; return TRUE; } /* * Break apart the pieces of an LDAP URL. * Syntax: * ldap://:/???? * * already known from 'conn->host.name'. * already known from 'conn->remote_port'. * extract the rest from 'data->state.path+1'. All fields are optional. * e.g. * ldap://:/??? * yields ludp->lud_dn = "". * * Defined in RFC4516 section 2. */ static int _ldap_url_parse2(struct Curl_easy *data, const struct connectdata *conn, LDAPURLDesc *ludp) { int rc = LDAP_SUCCESS; char *p; char *path; char *q = NULL; char *query = NULL; size_t i; if(!data || !data->state.up.path || data->state.up.path[0] != '/' || !strncasecompare("LDAP", data->state.up.scheme, 4)) return LDAP_INVALID_SYNTAX; ludp->lud_scope = LDAP_SCOPE_BASE; ludp->lud_port = conn->remote_port; ludp->lud_host = conn->host.name; /* Duplicate the path */ p = path = strdup(data->state.up.path + 1); if(!path) return LDAP_NO_MEMORY; /* Duplicate the query if present */ if(data->state.up.query) { q = query = strdup(data->state.up.query); if(!query) { free(path); return LDAP_NO_MEMORY; } } /* Parse the DN (Distinguished Name) */ if(*p) { char *dn = p; char *unescaped; CURLcode result; LDAP_TRACE(("DN '%s'\n", dn)); /* Unescape the DN */ result = Curl_urldecode(dn, 0, &unescaped, NULL, REJECT_ZERO); if(result) { rc = LDAP_NO_MEMORY; goto quit; } #if defined(USE_WIN32_LDAP) /* Convert the unescaped string to a tchar */ ludp->lud_dn = curlx_convert_UTF8_to_tchar(unescaped); /* Free the unescaped string as we are done with it */ free(unescaped); if(!ludp->lud_dn) { rc = LDAP_NO_MEMORY; goto quit; } #else ludp->lud_dn = unescaped; #endif } p = q; if(!p) goto quit; /* Parse the attributes. skip "??" */ q = strchr(p, '?'); if(q) *q++ = '\0'; if(*p) { char **attributes; size_t count = 0; /* Split the string into an array of attributes */ if(!split_str(p, &attributes, &count)) { rc = LDAP_NO_MEMORY; goto quit; } /* Allocate our array (+1 for the NULL entry) */ #if defined(USE_WIN32_LDAP) ludp->lud_attrs = calloc(count + 1, sizeof(TCHAR *)); #else ludp->lud_attrs = calloc(count + 1, sizeof(char *)); #endif if(!ludp->lud_attrs) { free(attributes); rc = LDAP_NO_MEMORY; goto quit; } for(i = 0; i < count; i++) { char *unescaped; CURLcode result; LDAP_TRACE(("attr[%zu] '%s'\n", i, attributes[i])); /* Unescape the attribute */ result = Curl_urldecode(attributes[i], 0, &unescaped, NULL, REJECT_ZERO); if(result) { free(attributes); rc = LDAP_NO_MEMORY; goto quit; } #if defined(USE_WIN32_LDAP) /* Convert the unescaped string to a tchar */ ludp->lud_attrs[i] = curlx_convert_UTF8_to_tchar(unescaped); /* Free the unescaped string as we are done with it */ free(unescaped); if(!ludp->lud_attrs[i]) { free(attributes); rc = LDAP_NO_MEMORY; goto quit; } #else ludp->lud_attrs[i] = unescaped; #endif ludp->lud_attrs_dups++; } free(attributes); } p = q; if(!p) goto quit; /* Parse the scope. skip "??" */ q = strchr(p, '?'); if(q) *q++ = '\0'; if(*p) { ludp->lud_scope = str2scope(p); if(ludp->lud_scope == -1) { rc = LDAP_INVALID_SYNTAX; goto quit; } LDAP_TRACE(("scope %d\n", ludp->lud_scope)); } p = q; if(!p) goto quit; /* Parse the filter */ q = strchr(p, '?'); if(q) *q++ = '\0'; if(*p) { char *filter = p; char *unescaped; CURLcode result; LDAP_TRACE(("filter '%s'\n", filter)); /* Unescape the filter */ result = Curl_urldecode(filter, 0, &unescaped, NULL, REJECT_ZERO); if(result) { rc = LDAP_NO_MEMORY; goto quit; } #if defined(USE_WIN32_LDAP) /* Convert the unescaped string to a tchar */ ludp->lud_filter = curlx_convert_UTF8_to_tchar(unescaped); /* Free the unescaped string as we are done with it */ free(unescaped); if(!ludp->lud_filter) { rc = LDAP_NO_MEMORY; goto quit; } #else ludp->lud_filter = unescaped; #endif } p = q; if(p && !*p) { rc = LDAP_INVALID_SYNTAX; goto quit; } quit: free(path); free(query); return rc; } static int _ldap_url_parse(struct Curl_easy *data, const struct connectdata *conn, LDAPURLDesc **ludpp) { LDAPURLDesc *ludp = calloc(1, sizeof(*ludp)); int rc; *ludpp = NULL; if(!ludp) return LDAP_NO_MEMORY; rc = _ldap_url_parse2(data, conn, ludp); if(rc != LDAP_SUCCESS) { _ldap_free_urldesc(ludp); ludp = NULL; } *ludpp = ludp; return (rc); } static void _ldap_free_urldesc(LDAPURLDesc *ludp) { if(!ludp) return; #if defined(USE_WIN32_LDAP) curlx_unicodefree(ludp->lud_dn); curlx_unicodefree(ludp->lud_filter); #else free(ludp->lud_dn); free(ludp->lud_filter); #endif if(ludp->lud_attrs) { size_t i; for(i = 0; i < ludp->lud_attrs_dups; i++) { #if defined(USE_WIN32_LDAP) curlx_unicodefree(ludp->lud_attrs[i]); #else free(ludp->lud_attrs[i]); #endif } free(ludp->lud_attrs); } free(ludp); } #endif /* !HAVE_LDAP_URL_PARSE */ #endif /* !CURL_DISABLE_LDAP && !USE_OPENLDAP */