2023-12-11 20:30:44 -05:00
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Marc Hoersken, <info@marc-hoersken.de>
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* Copyright (C) Mark Salisbury, <mark.salisbury@hp.com>
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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/*
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* Source file for Schannel-specific certificate verification. This code should
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* only be invoked by code in schannel.c.
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*/
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#include "curl_setup.h"
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#ifdef USE_SCHANNEL
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#ifndef USE_WINDOWS_SSPI
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# error "Can't compile SCHANNEL support without SSPI."
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#endif
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#include "schannel.h"
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#include "schannel_int.h"
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#include "vtls.h"
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#include "vtls_int.h"
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#include "sendf.h"
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#include "strerror.h"
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#include "curl_multibyte.h"
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#include "curl_printf.h"
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#include "hostcheck.h"
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#include "version_win32.h"
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/* The last #include file should be: */
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#include "curl_memory.h"
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#include "memdebug.h"
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#define BACKEND ((struct schannel_ssl_backend_data *)connssl->backend)
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#ifdef HAS_MANUAL_VERIFY_API
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#define MAX_CAFILE_SIZE 1048576 /* 1 MiB */
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#define BEGIN_CERT "-----BEGIN CERTIFICATE-----"
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#define END_CERT "\n-----END CERTIFICATE-----"
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struct cert_chain_engine_config_win7 {
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DWORD cbSize;
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HCERTSTORE hRestrictedRoot;
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HCERTSTORE hRestrictedTrust;
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HCERTSTORE hRestrictedOther;
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DWORD cAdditionalStore;
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HCERTSTORE *rghAdditionalStore;
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DWORD dwFlags;
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DWORD dwUrlRetrievalTimeout;
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DWORD MaximumCachedCertificates;
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DWORD CycleDetectionModulus;
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HCERTSTORE hExclusiveRoot;
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HCERTSTORE hExclusiveTrustedPeople;
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};
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static int is_cr_or_lf(char c)
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{
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return c == '\r' || c == '\n';
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}
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/* Search the substring needle,needlelen into string haystack,haystacklen
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* Strings don't need to be terminated by a '\0'.
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* Similar of OSX/Linux memmem (not available on Visual Studio).
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* Return position of beginning of first occurrence or NULL if not found
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*/
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static const char *c_memmem(const void *haystack, size_t haystacklen,
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const void *needle, size_t needlelen)
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{
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const char *p;
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char first;
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const char *str_limit = (const char *)haystack + haystacklen;
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if(!needlelen || needlelen > haystacklen)
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return NULL;
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first = *(const char *)needle;
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for(p = (const char *)haystack; p <= (str_limit - needlelen); p++)
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if(((*p) == first) && (memcmp(p, needle, needlelen) == 0))
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return p;
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return NULL;
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}
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static CURLcode add_certs_data_to_store(HCERTSTORE trust_store,
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const char *ca_buffer,
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size_t ca_buffer_size,
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const char *ca_file_text,
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struct Curl_easy *data)
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{
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const size_t begin_cert_len = strlen(BEGIN_CERT);
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const size_t end_cert_len = strlen(END_CERT);
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CURLcode result = CURLE_OK;
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int num_certs = 0;
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bool more_certs = 1;
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const char *current_ca_file_ptr = ca_buffer;
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const char *ca_buffer_limit = ca_buffer + ca_buffer_size;
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while(more_certs && (current_ca_file_ptr<ca_buffer_limit)) {
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const char *begin_cert_ptr = c_memmem(current_ca_file_ptr,
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ca_buffer_limit-current_ca_file_ptr,
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BEGIN_CERT,
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begin_cert_len);
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if(!begin_cert_ptr || !is_cr_or_lf(begin_cert_ptr[begin_cert_len])) {
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more_certs = 0;
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}
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else {
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const char *end_cert_ptr = c_memmem(begin_cert_ptr,
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ca_buffer_limit-begin_cert_ptr,
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END_CERT,
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end_cert_len);
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if(!end_cert_ptr) {
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failf(data,
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"schannel: CA file '%s' is not correctly formatted",
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ca_file_text);
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result = CURLE_SSL_CACERT_BADFILE;
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more_certs = 0;
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}
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else {
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CERT_BLOB cert_blob;
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CERT_CONTEXT *cert_context = NULL;
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BOOL add_cert_result = FALSE;
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DWORD actual_content_type = 0;
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DWORD cert_size = (DWORD)
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((end_cert_ptr + end_cert_len) - begin_cert_ptr);
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cert_blob.pbData = (BYTE *)begin_cert_ptr;
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cert_blob.cbData = cert_size;
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if(!CryptQueryObject(CERT_QUERY_OBJECT_BLOB,
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&cert_blob,
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CERT_QUERY_CONTENT_FLAG_CERT,
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CERT_QUERY_FORMAT_FLAG_ALL,
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0,
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NULL,
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&actual_content_type,
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NULL,
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NULL,
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NULL,
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(const void **)&cert_context)) {
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char buffer[STRERROR_LEN];
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failf(data,
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"schannel: failed to extract certificate from CA file "
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"'%s': %s",
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ca_file_text,
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Curl_winapi_strerror(GetLastError(), buffer, sizeof(buffer)));
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result = CURLE_SSL_CACERT_BADFILE;
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more_certs = 0;
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}
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else {
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current_ca_file_ptr = begin_cert_ptr + cert_size;
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/* Sanity check that the cert_context object is the right type */
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if(CERT_QUERY_CONTENT_CERT != actual_content_type) {
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failf(data,
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2024-05-15 15:20:32 -04:00
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"schannel: unexpected content type '%lu' when extracting "
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2023-12-11 20:30:44 -05:00
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"certificate from CA file '%s'",
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actual_content_type, ca_file_text);
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result = CURLE_SSL_CACERT_BADFILE;
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more_certs = 0;
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}
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else {
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add_cert_result =
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CertAddCertificateContextToStore(trust_store,
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cert_context,
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CERT_STORE_ADD_ALWAYS,
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NULL);
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CertFreeCertificateContext(cert_context);
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if(!add_cert_result) {
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char buffer[STRERROR_LEN];
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failf(data,
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"schannel: failed to add certificate from CA file '%s' "
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"to certificate store: %s",
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ca_file_text,
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Curl_winapi_strerror(GetLastError(), buffer,
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sizeof(buffer)));
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result = CURLE_SSL_CACERT_BADFILE;
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more_certs = 0;
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}
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else {
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num_certs++;
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}
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}
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}
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}
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}
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}
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if(result == CURLE_OK) {
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if(!num_certs) {
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infof(data,
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"schannel: did not add any certificates from CA file '%s'",
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ca_file_text);
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}
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else {
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infof(data,
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"schannel: added %d certificate(s) from CA file '%s'",
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num_certs, ca_file_text);
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}
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}
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return result;
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}
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static CURLcode add_certs_file_to_store(HCERTSTORE trust_store,
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const char *ca_file,
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struct Curl_easy *data)
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{
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CURLcode result;
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HANDLE ca_file_handle = INVALID_HANDLE_VALUE;
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LARGE_INTEGER file_size;
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char *ca_file_buffer = NULL;
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TCHAR *ca_file_tstr = NULL;
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size_t ca_file_bufsize = 0;
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DWORD total_bytes_read = 0;
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ca_file_tstr = curlx_convert_UTF8_to_tchar((char *)ca_file);
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if(!ca_file_tstr) {
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char buffer[STRERROR_LEN];
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failf(data,
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"schannel: invalid path name for CA file '%s': %s",
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ca_file,
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Curl_winapi_strerror(GetLastError(), buffer, sizeof(buffer)));
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result = CURLE_SSL_CACERT_BADFILE;
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goto cleanup;
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}
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/*
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* Read the CA file completely into memory before parsing it. This
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* optimizes for the common case where the CA file will be relatively
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* small ( < 1 MiB ).
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*/
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ca_file_handle = CreateFile(ca_file_tstr,
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GENERIC_READ,
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FILE_SHARE_READ,
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NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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NULL);
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if(ca_file_handle == INVALID_HANDLE_VALUE) {
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char buffer[STRERROR_LEN];
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failf(data,
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"schannel: failed to open CA file '%s': %s",
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ca_file,
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Curl_winapi_strerror(GetLastError(), buffer, sizeof(buffer)));
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result = CURLE_SSL_CACERT_BADFILE;
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goto cleanup;
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}
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if(!GetFileSizeEx(ca_file_handle, &file_size)) {
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char buffer[STRERROR_LEN];
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failf(data,
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"schannel: failed to determine size of CA file '%s': %s",
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ca_file,
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Curl_winapi_strerror(GetLastError(), buffer, sizeof(buffer)));
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result = CURLE_SSL_CACERT_BADFILE;
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goto cleanup;
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}
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if(file_size.QuadPart > MAX_CAFILE_SIZE) {
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failf(data,
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"schannel: CA file exceeds max size of %u bytes",
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MAX_CAFILE_SIZE);
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result = CURLE_SSL_CACERT_BADFILE;
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goto cleanup;
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}
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ca_file_bufsize = (size_t)file_size.QuadPart;
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ca_file_buffer = (char *)malloc(ca_file_bufsize + 1);
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if(!ca_file_buffer) {
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result = CURLE_OUT_OF_MEMORY;
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goto cleanup;
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}
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while(total_bytes_read < ca_file_bufsize) {
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DWORD bytes_to_read = (DWORD)(ca_file_bufsize - total_bytes_read);
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DWORD bytes_read = 0;
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if(!ReadFile(ca_file_handle, ca_file_buffer + total_bytes_read,
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bytes_to_read, &bytes_read, NULL)) {
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char buffer[STRERROR_LEN];
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failf(data,
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"schannel: failed to read from CA file '%s': %s",
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ca_file,
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Curl_winapi_strerror(GetLastError(), buffer, sizeof(buffer)));
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result = CURLE_SSL_CACERT_BADFILE;
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goto cleanup;
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}
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if(bytes_read == 0) {
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/* Premature EOF -- adjust the bufsize to the new value */
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ca_file_bufsize = total_bytes_read;
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}
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else {
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total_bytes_read += bytes_read;
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}
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}
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/* Null terminate the buffer */
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ca_file_buffer[ca_file_bufsize] = '\0';
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result = add_certs_data_to_store(trust_store,
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ca_file_buffer, ca_file_bufsize,
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ca_file,
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data);
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cleanup:
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if(ca_file_handle != INVALID_HANDLE_VALUE) {
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CloseHandle(ca_file_handle);
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}
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Curl_safefree(ca_file_buffer);
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curlx_unicodefree(ca_file_tstr);
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return result;
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}
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#endif /* HAS_MANUAL_VERIFY_API */
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/*
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* Returns the number of characters necessary to populate all the host_names.
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* If host_names is not NULL, populate it with all the host names. Each string
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* in the host_names is null-terminated and the last string is double
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* null-terminated. If no DNS names are found, a single null-terminated empty
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* string is returned.
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*/
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static DWORD cert_get_name_string(struct Curl_easy *data,
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CERT_CONTEXT *cert_context,
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LPTSTR host_names,
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DWORD length)
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{
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DWORD actual_length = 0;
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BOOL compute_content = FALSE;
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CERT_INFO *cert_info = NULL;
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CERT_EXTENSION *extension = NULL;
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CRYPT_DECODE_PARA decode_para = {0, 0, 0};
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CERT_ALT_NAME_INFO *alt_name_info = NULL;
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DWORD alt_name_info_size = 0;
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BOOL ret_val = FALSE;
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LPTSTR current_pos = NULL;
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DWORD i;
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#ifdef CERT_NAME_SEARCH_ALL_NAMES_FLAG
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/* CERT_NAME_SEARCH_ALL_NAMES_FLAG is available from Windows 8 onwards. */
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|
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if(curlx_verify_windows_version(6, 2, 0, PLATFORM_WINNT,
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VERSION_GREATER_THAN_EQUAL)) {
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|
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/* CertGetNameString will provide the 8-bit character string without
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* any decoding */
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|
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DWORD name_flags =
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|
|
CERT_NAME_DISABLE_IE4_UTF8_FLAG | CERT_NAME_SEARCH_ALL_NAMES_FLAG;
|
|
|
|
actual_length = CertGetNameString(cert_context,
|
|
|
|
CERT_NAME_DNS_TYPE,
|
|
|
|
name_flags,
|
|
|
|
NULL,
|
|
|
|
host_names,
|
|
|
|
length);
|
|
|
|
return actual_length;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
compute_content = host_names != NULL && length != 0;
|
|
|
|
|
|
|
|
/* Initialize default return values. */
|
|
|
|
actual_length = 1;
|
|
|
|
if(compute_content) {
|
|
|
|
*host_names = '\0';
|
|
|
|
}
|
|
|
|
|
|
|
|
if(!cert_context) {
|
|
|
|
failf(data, "schannel: Null certificate context.");
|
|
|
|
return actual_length;
|
|
|
|
}
|
|
|
|
|
|
|
|
cert_info = cert_context->pCertInfo;
|
|
|
|
if(!cert_info) {
|
|
|
|
failf(data, "schannel: Null certificate info.");
|
|
|
|
return actual_length;
|
|
|
|
}
|
|
|
|
|
|
|
|
extension = CertFindExtension(szOID_SUBJECT_ALT_NAME2,
|
|
|
|
cert_info->cExtension,
|
|
|
|
cert_info->rgExtension);
|
|
|
|
if(!extension) {
|
|
|
|
failf(data, "schannel: CertFindExtension() returned no extension.");
|
|
|
|
return actual_length;
|
|
|
|
}
|
|
|
|
|
|
|
|
decode_para.cbSize = sizeof(CRYPT_DECODE_PARA);
|
|
|
|
|
|
|
|
ret_val =
|
|
|
|
CryptDecodeObjectEx(X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
|
|
|
|
szOID_SUBJECT_ALT_NAME2,
|
|
|
|
extension->Value.pbData,
|
|
|
|
extension->Value.cbData,
|
|
|
|
CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG,
|
|
|
|
&decode_para,
|
|
|
|
&alt_name_info,
|
|
|
|
&alt_name_info_size);
|
|
|
|
if(!ret_val) {
|
|
|
|
failf(data,
|
|
|
|
"schannel: CryptDecodeObjectEx() returned no alternate name "
|
|
|
|
"information.");
|
|
|
|
return actual_length;
|
|
|
|
}
|
|
|
|
|
|
|
|
current_pos = host_names;
|
|
|
|
|
|
|
|
/* Iterate over the alternate names and populate host_names. */
|
|
|
|
for(i = 0; i < alt_name_info->cAltEntry; i++) {
|
|
|
|
const CERT_ALT_NAME_ENTRY *entry = &alt_name_info->rgAltEntry[i];
|
|
|
|
wchar_t *dns_w = NULL;
|
|
|
|
size_t current_length = 0;
|
|
|
|
|
|
|
|
if(entry->dwAltNameChoice != CERT_ALT_NAME_DNS_NAME) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if(!entry->pwszDNSName) {
|
|
|
|
infof(data, "schannel: Empty DNS name.");
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
current_length = wcslen(entry->pwszDNSName) + 1;
|
|
|
|
if(!compute_content) {
|
|
|
|
actual_length += (DWORD)current_length;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
/* Sanity check to prevent buffer overrun. */
|
|
|
|
if((actual_length + current_length) > length) {
|
|
|
|
failf(data, "schannel: Not enough memory to list all host names.");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
dns_w = entry->pwszDNSName;
|
|
|
|
/* pwszDNSName is in ia5 string format and hence doesn't contain any
|
|
|
|
* non-ascii characters. */
|
|
|
|
while(*dns_w != '\0') {
|
|
|
|
*current_pos++ = (char)(*dns_w++);
|
|
|
|
}
|
|
|
|
*current_pos++ = '\0';
|
|
|
|
actual_length += (DWORD)current_length;
|
|
|
|
}
|
|
|
|
if(compute_content) {
|
|
|
|
/* Last string has double null-terminator. */
|
|
|
|
*current_pos = '\0';
|
|
|
|
}
|
|
|
|
return actual_length;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Verify the server's hostname */
|
|
|
|
CURLcode Curl_verify_host(struct Curl_cfilter *cf,
|
|
|
|
struct Curl_easy *data)
|
|
|
|
{
|
|
|
|
struct ssl_connect_data *connssl = cf->ctx;
|
|
|
|
SECURITY_STATUS sspi_status;
|
|
|
|
CURLcode result = CURLE_PEER_FAILED_VERIFICATION;
|
|
|
|
CERT_CONTEXT *pCertContextServer = NULL;
|
|
|
|
TCHAR *cert_hostname_buff = NULL;
|
|
|
|
size_t cert_hostname_buff_index = 0;
|
|
|
|
const char *conn_hostname = connssl->peer.hostname;
|
|
|
|
size_t hostlen = strlen(conn_hostname);
|
|
|
|
DWORD len = 0;
|
|
|
|
DWORD actual_len = 0;
|
|
|
|
|
|
|
|
sspi_status =
|
|
|
|
s_pSecFn->QueryContextAttributes(&BACKEND->ctxt->ctxt_handle,
|
|
|
|
SECPKG_ATTR_REMOTE_CERT_CONTEXT,
|
|
|
|
&pCertContextServer);
|
|
|
|
|
|
|
|
if((sspi_status != SEC_E_OK) || !pCertContextServer) {
|
|
|
|
char buffer[STRERROR_LEN];
|
|
|
|
failf(data, "schannel: Failed to read remote certificate context: %s",
|
|
|
|
Curl_sspi_strerror(sspi_status, buffer, sizeof(buffer)));
|
|
|
|
result = CURLE_PEER_FAILED_VERIFICATION;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Determine the size of the string needed for the cert hostname */
|
|
|
|
len = cert_get_name_string(data, pCertContextServer, NULL, 0);
|
|
|
|
if(len == 0) {
|
|
|
|
failf(data,
|
|
|
|
"schannel: CertGetNameString() returned no "
|
|
|
|
"certificate name information");
|
|
|
|
result = CURLE_PEER_FAILED_VERIFICATION;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* CertGetNameString guarantees that the returned name will not contain
|
|
|
|
* embedded null bytes. This appears to be undocumented behavior.
|
|
|
|
*/
|
|
|
|
cert_hostname_buff = (LPTSTR)malloc(len * sizeof(TCHAR));
|
|
|
|
if(!cert_hostname_buff) {
|
|
|
|
result = CURLE_OUT_OF_MEMORY;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
actual_len = cert_get_name_string(
|
|
|
|
data, pCertContextServer, (LPTSTR)cert_hostname_buff, len);
|
|
|
|
|
|
|
|
/* Sanity check */
|
|
|
|
if(actual_len != len) {
|
|
|
|
failf(data,
|
|
|
|
"schannel: CertGetNameString() returned certificate "
|
|
|
|
"name information of unexpected size");
|
|
|
|
result = CURLE_PEER_FAILED_VERIFICATION;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* cert_hostname_buff contains all DNS names, where each name is
|
|
|
|
* null-terminated and the last DNS name is double null-terminated. Due to
|
|
|
|
* this encoding, use the length of the buffer to iterate over all names.
|
|
|
|
*/
|
|
|
|
result = CURLE_PEER_FAILED_VERIFICATION;
|
|
|
|
while(cert_hostname_buff_index < len &&
|
|
|
|
cert_hostname_buff[cert_hostname_buff_index] != TEXT('\0') &&
|
|
|
|
result == CURLE_PEER_FAILED_VERIFICATION) {
|
|
|
|
|
|
|
|
char *cert_hostname;
|
|
|
|
|
|
|
|
/* Comparing the cert name and the connection hostname encoded as UTF-8
|
|
|
|
* is acceptable since both values are assumed to use ASCII
|
|
|
|
* (or some equivalent) encoding
|
|
|
|
*/
|
|
|
|
cert_hostname = curlx_convert_tchar_to_UTF8(
|
|
|
|
&cert_hostname_buff[cert_hostname_buff_index]);
|
|
|
|
if(!cert_hostname) {
|
|
|
|
result = CURLE_OUT_OF_MEMORY;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
if(Curl_cert_hostcheck(cert_hostname, strlen(cert_hostname),
|
|
|
|
conn_hostname, hostlen)) {
|
|
|
|
infof(data,
|
|
|
|
"schannel: connection hostname (%s) validated "
|
|
|
|
"against certificate name (%s)",
|
|
|
|
conn_hostname, cert_hostname);
|
|
|
|
result = CURLE_OK;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
size_t cert_hostname_len;
|
|
|
|
|
|
|
|
infof(data,
|
|
|
|
"schannel: connection hostname (%s) did not match "
|
|
|
|
"against certificate name (%s)",
|
|
|
|
conn_hostname, cert_hostname);
|
|
|
|
|
|
|
|
cert_hostname_len =
|
|
|
|
_tcslen(&cert_hostname_buff[cert_hostname_buff_index]);
|
|
|
|
|
|
|
|
/* Move on to next cert name */
|
|
|
|
cert_hostname_buff_index += cert_hostname_len + 1;
|
|
|
|
|
|
|
|
result = CURLE_PEER_FAILED_VERIFICATION;
|
|
|
|
}
|
|
|
|
curlx_unicodefree(cert_hostname);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if(result == CURLE_PEER_FAILED_VERIFICATION) {
|
|
|
|
failf(data,
|
|
|
|
"schannel: CertGetNameString() failed to match "
|
|
|
|
"connection hostname (%s) against server certificate names",
|
|
|
|
conn_hostname);
|
|
|
|
}
|
|
|
|
else if(result != CURLE_OK)
|
|
|
|
failf(data, "schannel: server certificate name verification failed");
|
|
|
|
|
|
|
|
cleanup:
|
|
|
|
Curl_safefree(cert_hostname_buff);
|
|
|
|
|
|
|
|
if(pCertContextServer)
|
|
|
|
CertFreeCertificateContext(pCertContextServer);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef HAS_MANUAL_VERIFY_API
|
|
|
|
/* Verify the server's certificate and hostname */
|
|
|
|
CURLcode Curl_verify_certificate(struct Curl_cfilter *cf,
|
|
|
|
struct Curl_easy *data)
|
|
|
|
{
|
|
|
|
struct ssl_connect_data *connssl = cf->ctx;
|
|
|
|
struct ssl_primary_config *conn_config = Curl_ssl_cf_get_primary_config(cf);
|
|
|
|
struct ssl_config_data *ssl_config = Curl_ssl_cf_get_config(cf, data);
|
|
|
|
SECURITY_STATUS sspi_status;
|
|
|
|
CURLcode result = CURLE_OK;
|
|
|
|
CERT_CONTEXT *pCertContextServer = NULL;
|
|
|
|
const CERT_CHAIN_CONTEXT *pChainContext = NULL;
|
|
|
|
HCERTCHAINENGINE cert_chain_engine = NULL;
|
|
|
|
HCERTSTORE trust_store = NULL;
|
|
|
|
HCERTSTORE own_trust_store = NULL;
|
|
|
|
|
|
|
|
DEBUGASSERT(BACKEND);
|
|
|
|
|
|
|
|
sspi_status =
|
|
|
|
s_pSecFn->QueryContextAttributes(&BACKEND->ctxt->ctxt_handle,
|
|
|
|
SECPKG_ATTR_REMOTE_CERT_CONTEXT,
|
|
|
|
&pCertContextServer);
|
|
|
|
|
|
|
|
if((sspi_status != SEC_E_OK) || !pCertContextServer) {
|
|
|
|
char buffer[STRERROR_LEN];
|
|
|
|
failf(data, "schannel: Failed to read remote certificate context: %s",
|
|
|
|
Curl_sspi_strerror(sspi_status, buffer, sizeof(buffer)));
|
|
|
|
result = CURLE_PEER_FAILED_VERIFICATION;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(result == CURLE_OK &&
|
|
|
|
(conn_config->CAfile || conn_config->ca_info_blob) &&
|
|
|
|
BACKEND->use_manual_cred_validation) {
|
|
|
|
/*
|
|
|
|
* Create a chain engine that uses the certificates in the CA file as
|
|
|
|
* trusted certificates. This is only supported on Windows 7+.
|
|
|
|
*/
|
|
|
|
|
|
|
|
if(curlx_verify_windows_version(6, 1, 0, PLATFORM_WINNT,
|
|
|
|
VERSION_LESS_THAN)) {
|
|
|
|
failf(data, "schannel: this version of Windows is too old to support "
|
|
|
|
"certificate verification via CA bundle file.");
|
|
|
|
result = CURLE_SSL_CACERT_BADFILE;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
/* try cache */
|
|
|
|
trust_store = Curl_schannel_get_cached_cert_store(cf, data);
|
|
|
|
|
|
|
|
if(trust_store) {
|
|
|
|
infof(data, "schannel: reusing certificate store from cache");
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
/* Open the certificate store */
|
|
|
|
trust_store = CertOpenStore(CERT_STORE_PROV_MEMORY,
|
|
|
|
0,
|
|
|
|
(HCRYPTPROV)NULL,
|
|
|
|
CERT_STORE_CREATE_NEW_FLAG,
|
|
|
|
NULL);
|
|
|
|
if(!trust_store) {
|
|
|
|
char buffer[STRERROR_LEN];
|
|
|
|
failf(data, "schannel: failed to create certificate store: %s",
|
|
|
|
Curl_winapi_strerror(GetLastError(), buffer, sizeof(buffer)));
|
|
|
|
result = CURLE_SSL_CACERT_BADFILE;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
const struct curl_blob *ca_info_blob = conn_config->ca_info_blob;
|
|
|
|
own_trust_store = trust_store;
|
|
|
|
|
|
|
|
if(ca_info_blob) {
|
|
|
|
result = add_certs_data_to_store(trust_store,
|
|
|
|
(const char *)ca_info_blob->data,
|
|
|
|
ca_info_blob->len,
|
|
|
|
"(memory blob)",
|
|
|
|
data);
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
result = add_certs_file_to_store(trust_store,
|
|
|
|
conn_config->CAfile,
|
|
|
|
data);
|
|
|
|
}
|
|
|
|
if(result == CURLE_OK) {
|
|
|
|
if(Curl_schannel_set_cached_cert_store(cf, data, trust_store)) {
|
|
|
|
own_trust_store = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if(result == CURLE_OK) {
|
|
|
|
struct cert_chain_engine_config_win7 engine_config;
|
|
|
|
BOOL create_engine_result;
|
|
|
|
|
|
|
|
memset(&engine_config, 0, sizeof(engine_config));
|
|
|
|
engine_config.cbSize = sizeof(engine_config);
|
|
|
|
engine_config.hExclusiveRoot = trust_store;
|
|
|
|
|
|
|
|
/* CertCreateCertificateChainEngine will check the expected size of the
|
|
|
|
* CERT_CHAIN_ENGINE_CONFIG structure and fail if the specified size
|
|
|
|
* does not match the expected size. When this occurs, it indicates that
|
|
|
|
* CAINFO is not supported on the version of Windows in use.
|
|
|
|
*/
|
|
|
|
create_engine_result =
|
|
|
|
CertCreateCertificateChainEngine(
|
|
|
|
(CERT_CHAIN_ENGINE_CONFIG *)&engine_config, &cert_chain_engine);
|
|
|
|
if(!create_engine_result) {
|
|
|
|
char buffer[STRERROR_LEN];
|
|
|
|
failf(data,
|
|
|
|
"schannel: failed to create certificate chain engine: %s",
|
|
|
|
Curl_winapi_strerror(GetLastError(), buffer, sizeof(buffer)));
|
|
|
|
result = CURLE_SSL_CACERT_BADFILE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if(result == CURLE_OK) {
|
|
|
|
CERT_CHAIN_PARA ChainPara;
|
|
|
|
|
|
|
|
memset(&ChainPara, 0, sizeof(ChainPara));
|
|
|
|
ChainPara.cbSize = sizeof(ChainPara);
|
|
|
|
|
|
|
|
if(!CertGetCertificateChain(cert_chain_engine,
|
|
|
|
pCertContextServer,
|
|
|
|
NULL,
|
|
|
|
pCertContextServer->hCertStore,
|
|
|
|
&ChainPara,
|
|
|
|
(ssl_config->no_revoke ? 0 :
|
|
|
|
CERT_CHAIN_REVOCATION_CHECK_CHAIN),
|
|
|
|
NULL,
|
|
|
|
&pChainContext)) {
|
|
|
|
char buffer[STRERROR_LEN];
|
|
|
|
failf(data, "schannel: CertGetCertificateChain failed: %s",
|
|
|
|
Curl_winapi_strerror(GetLastError(), buffer, sizeof(buffer)));
|
|
|
|
pChainContext = NULL;
|
|
|
|
result = CURLE_PEER_FAILED_VERIFICATION;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(result == CURLE_OK) {
|
|
|
|
CERT_SIMPLE_CHAIN *pSimpleChain = pChainContext->rgpChain[0];
|
|
|
|
DWORD dwTrustErrorMask = ~(DWORD)(CERT_TRUST_IS_NOT_TIME_NESTED);
|
|
|
|
dwTrustErrorMask &= pSimpleChain->TrustStatus.dwErrorStatus;
|
|
|
|
|
|
|
|
if(data->set.ssl.revoke_best_effort) {
|
|
|
|
/* Ignore errors when root certificates are missing the revocation
|
|
|
|
* list URL, or when the list could not be downloaded because the
|
|
|
|
* server is currently unreachable. */
|
|
|
|
dwTrustErrorMask &= ~(DWORD)(CERT_TRUST_REVOCATION_STATUS_UNKNOWN |
|
|
|
|
CERT_TRUST_IS_OFFLINE_REVOCATION);
|
|
|
|
}
|
|
|
|
|
|
|
|
if(dwTrustErrorMask) {
|
|
|
|
if(dwTrustErrorMask & CERT_TRUST_IS_REVOKED)
|
|
|
|
failf(data, "schannel: CertGetCertificateChain trust error"
|
|
|
|
" CERT_TRUST_IS_REVOKED");
|
|
|
|
else if(dwTrustErrorMask & CERT_TRUST_IS_PARTIAL_CHAIN)
|
|
|
|
failf(data, "schannel: CertGetCertificateChain trust error"
|
|
|
|
" CERT_TRUST_IS_PARTIAL_CHAIN");
|
|
|
|
else if(dwTrustErrorMask & CERT_TRUST_IS_UNTRUSTED_ROOT)
|
|
|
|
failf(data, "schannel: CertGetCertificateChain trust error"
|
|
|
|
" CERT_TRUST_IS_UNTRUSTED_ROOT");
|
|
|
|
else if(dwTrustErrorMask & CERT_TRUST_IS_NOT_TIME_VALID)
|
|
|
|
failf(data, "schannel: CertGetCertificateChain trust error"
|
|
|
|
" CERT_TRUST_IS_NOT_TIME_VALID");
|
|
|
|
else if(dwTrustErrorMask & CERT_TRUST_REVOCATION_STATUS_UNKNOWN)
|
|
|
|
failf(data, "schannel: CertGetCertificateChain trust error"
|
|
|
|
" CERT_TRUST_REVOCATION_STATUS_UNKNOWN");
|
|
|
|
else
|
2024-05-15 15:20:32 -04:00
|
|
|
failf(data, "schannel: CertGetCertificateChain error mask: 0x%08lx",
|
2023-12-11 20:30:44 -05:00
|
|
|
dwTrustErrorMask);
|
|
|
|
result = CURLE_PEER_FAILED_VERIFICATION;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if(result == CURLE_OK) {
|
|
|
|
if(conn_config->verifyhost) {
|
|
|
|
result = Curl_verify_host(cf, data);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if(cert_chain_engine) {
|
|
|
|
CertFreeCertificateChainEngine(cert_chain_engine);
|
|
|
|
}
|
|
|
|
|
|
|
|
if(own_trust_store) {
|
|
|
|
CertCloseStore(own_trust_store, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
if(pChainContext)
|
|
|
|
CertFreeCertificateChain(pChainContext);
|
|
|
|
|
|
|
|
if(pCertContextServer)
|
|
|
|
CertFreeCertificateContext(pCertContextServer);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* HAS_MANUAL_VERIFY_API */
|
|
|
|
#endif /* USE_SCHANNEL */
|