diff options
Diffstat (limited to 'plugins/FTPFileYM/curl-7.29.0/lib/curl_schannel.c')
| -rw-r--r-- | plugins/FTPFileYM/curl-7.29.0/lib/curl_schannel.c | 1296 |
1 files changed, 0 insertions, 1296 deletions
diff --git a/plugins/FTPFileYM/curl-7.29.0/lib/curl_schannel.c b/plugins/FTPFileYM/curl-7.29.0/lib/curl_schannel.c deleted file mode 100644 index a615f57681..0000000000 --- a/plugins/FTPFileYM/curl-7.29.0/lib/curl_schannel.c +++ /dev/null @@ -1,1296 +0,0 @@ -/*************************************************************************** - * _ _ ____ _ - * Project ___| | | | _ \| | - * / __| | | | |_) | | - * | (__| |_| | _ <| |___ - * \___|\___/|_| \_\_____| - * - * Copyright (C) 2012 - 2013, Marc Hoersken, <info@marc-hoersken.de> - * Copyright (C) 2012, Mark Salisbury, <mark.salisbury@hp.com> - * Copyright (C) 2012 - 2013, Daniel Stenberg, <daniel@haxx.se>, 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 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. - * - ***************************************************************************/ - -/* - * Source file for all SChannel-specific code for the TLS/SSL layer. No code - * but sslgen.c should ever call or use these functions. - * - */ - -/* - * Based upon the PolarSSL implementation in polarssl.c and polarssl.h: - * Copyright (C) 2010, 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com> - * - * Based upon the CyaSSL implementation in cyassl.c and cyassl.h: - * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al. - * - * Thanks for code and inspiration! - */ - -/* - * TODO list for TLS/SSL implementation: - * - implement client certificate authentication - * - implement custom server certificate validation - * - implement cipher/algorithm option - * - * Related articles on MSDN: - * - Getting a Certificate for Schannel - * http://msdn.microsoft.com/en-us/library/windows/desktop/aa375447.aspx - * - Specifying Schannel Ciphers and Cipher Strengths - * http://msdn.microsoft.com/en-us/library/windows/desktop/aa380161.aspx - */ - -#include "curl_setup.h" - -#ifdef USE_SCHANNEL - -#ifndef USE_WINDOWS_SSPI -# error "Can't compile SCHANNEL support without SSPI." -#endif - -#include "curl_sspi.h" -#include "curl_schannel.h" -#include "sslgen.h" -#include "sendf.h" -#include "connect.h" /* for the connect timeout */ -#include "strerror.h" -#include "select.h" /* for the socket readyness */ -#include "inet_pton.h" /* for IP addr SNI check */ -#include "curl_multibyte.h" -#include "warnless.h" - -#define _MPRINTF_REPLACE /* use our functions only */ -#include <curl/mprintf.h> - -#include "curl_memory.h" -/* The last #include file should be: */ -#include "memdebug.h" - -/* Uncomment to force verbose output - * #define infof(x, y, ...) printf(y, __VA_ARGS__) - * #define failf(x, y, ...) printf(y, __VA_ARGS__) - */ - -static Curl_recv schannel_recv; -static Curl_send schannel_send; - -#ifdef _WIN32_WCE -static CURLcode verify_certificate(struct connectdata *conn, int sockindex); -#endif - -static void InitSecBuffer(SecBuffer *buffer, unsigned long BufType, - void *BufDataPtr, unsigned long BufByteSize) -{ - buffer->cbBuffer = BufByteSize; - buffer->BufferType = BufType; - buffer->pvBuffer = BufDataPtr; -} - -static void InitSecBufferDesc(SecBufferDesc *desc, SecBuffer *BufArr, - unsigned long NumArrElem) -{ - desc->ulVersion = SECBUFFER_VERSION; - desc->pBuffers = BufArr; - desc->cBuffers = NumArrElem; -} - -static CURLcode -schannel_connect_step1(struct connectdata *conn, int sockindex) -{ - ssize_t written = -1; - struct SessionHandle *data = conn->data; - struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - SecBuffer outbuf; - SecBufferDesc outbuf_desc; - SCHANNEL_CRED schannel_cred; - SECURITY_STATUS sspi_status = SEC_E_OK; - struct curl_schannel_cred *old_cred = NULL; - struct in_addr addr; -#ifdef ENABLE_IPV6 - struct in6_addr addr6; -#endif - TCHAR *host_name; - CURLcode code; - - infof(data, "schannel: SSL/TLS connection with %s port %hu (step 1/3)\n", - conn->host.name, conn->remote_port); - - /* check for an existing re-usable credential handle */ - if(!Curl_ssl_getsessionid(conn, (void**)&old_cred, NULL)) { - connssl->cred = old_cred; - infof(data, "schannel: re-using existing credential handle\n"); - } - else { - /* setup Schannel API options */ - memset(&schannel_cred, 0, sizeof(schannel_cred)); - schannel_cred.dwVersion = SCHANNEL_CRED_VERSION; - - if(data->set.ssl.verifypeer) { -#ifdef _WIN32_WCE - /* certificate validation on CE doesn't seem to work right; we'll - do it following a more manual process. */ - schannel_cred.dwFlags = SCH_CRED_MANUAL_CRED_VALIDATION | - SCH_CRED_IGNORE_NO_REVOCATION_CHECK | - SCH_CRED_IGNORE_REVOCATION_OFFLINE; -#else - schannel_cred.dwFlags = SCH_CRED_AUTO_CRED_VALIDATION | - SCH_CRED_REVOCATION_CHECK_CHAIN; -#endif - infof(data, "schannel: checking server certificate revocation\n"); - } - else { - schannel_cred.dwFlags = SCH_CRED_MANUAL_CRED_VALIDATION | - SCH_CRED_IGNORE_NO_REVOCATION_CHECK | - SCH_CRED_IGNORE_REVOCATION_OFFLINE; - infof(data, "schannel: disable server certificate revocation checks\n"); - } - - if(Curl_inet_pton(AF_INET, conn->host.name, &addr) -#ifdef ENABLE_IPV6 - || Curl_inet_pton(AF_INET6, conn->host.name, &addr6) -#endif - ) { - schannel_cred.dwFlags |= SCH_CRED_NO_SERVERNAME_CHECK; - infof(data, "schannel: using IP address, SNI is being disabled by " - "disabling the servername check against the " - "subject names in server certificates.\n"); - } - - if(!data->set.ssl.verifyhost) { - schannel_cred.dwFlags |= SCH_CRED_NO_SERVERNAME_CHECK; - infof(data, "schannel: verifyhost setting prevents Schannel from " - "comparing the supplied target name with the subject " - "names in server certificates. Also disables SNI.\n"); - } - - switch(data->set.ssl.version) { - case CURL_SSLVERSION_TLSv1: - schannel_cred.grbitEnabledProtocols = SP_PROT_TLS1_0_CLIENT | - SP_PROT_TLS1_1_CLIENT | - SP_PROT_TLS1_2_CLIENT; - break; - case CURL_SSLVERSION_SSLv3: - schannel_cred.grbitEnabledProtocols = SP_PROT_SSL3_CLIENT; - break; - case CURL_SSLVERSION_SSLv2: - schannel_cred.grbitEnabledProtocols = SP_PROT_SSL2_CLIENT; - break; - } - - /* allocate memory for the re-usable credential handle */ - connssl->cred = malloc(sizeof(struct curl_schannel_cred)); - if(!connssl->cred) { - failf(data, "schannel: unable to allocate memory"); - return CURLE_OUT_OF_MEMORY; - } - memset(connssl->cred, 0, sizeof(struct curl_schannel_cred)); - - /* http://msdn.microsoft.com/en-us/library/windows/desktop/aa374716.aspx */ - sspi_status = s_pSecFn->AcquireCredentialsHandle(NULL, (TCHAR *)UNISP_NAME, - SECPKG_CRED_OUTBOUND, NULL, &schannel_cred, NULL, NULL, - &connssl->cred->cred_handle, &connssl->cred->time_stamp); - - if(sspi_status != SEC_E_OK) { - if(sspi_status == SEC_E_WRONG_PRINCIPAL) - failf(data, "schannel: SNI or certificate check failed: %s", - Curl_sspi_strerror(conn, sspi_status)); - else - failf(data, "schannel: AcquireCredentialsHandle failed: %s", - Curl_sspi_strerror(conn, sspi_status)); - Curl_safefree(connssl->cred); - return CURLE_SSL_CONNECT_ERROR; - } - } - - /* setup output buffer */ - InitSecBuffer(&outbuf, SECBUFFER_EMPTY, NULL, 0); - InitSecBufferDesc(&outbuf_desc, &outbuf, 1); - - /* setup request flags */ - connssl->req_flags = ISC_REQ_SEQUENCE_DETECT | ISC_REQ_REPLAY_DETECT | - ISC_REQ_CONFIDENTIALITY | ISC_REQ_ALLOCATE_MEMORY | - ISC_REQ_STREAM; - - /* allocate memory for the security context handle */ - connssl->ctxt = malloc(sizeof(struct curl_schannel_ctxt)); - if(!connssl->ctxt) { - failf(data, "schannel: unable to allocate memory"); - return CURLE_OUT_OF_MEMORY; - } - memset(connssl->ctxt, 0, sizeof(struct curl_schannel_ctxt)); - - host_name = Curl_convert_UTF8_to_tchar(conn->host.name); - if(!host_name) - return CURLE_OUT_OF_MEMORY; - - /* http://msdn.microsoft.com/en-us/library/windows/desktop/aa375924.aspx */ - - sspi_status = s_pSecFn->InitializeSecurityContext( - &connssl->cred->cred_handle, NULL, host_name, - connssl->req_flags, 0, 0, NULL, 0, &connssl->ctxt->ctxt_handle, - &outbuf_desc, &connssl->ret_flags, &connssl->ctxt->time_stamp); - - Curl_unicodefree(host_name); - - if(sspi_status != SEC_I_CONTINUE_NEEDED) { - if(sspi_status == SEC_E_WRONG_PRINCIPAL) - failf(data, "schannel: SNI or certificate check failed: %s", - Curl_sspi_strerror(conn, sspi_status)); - else - failf(data, "schannel: initial InitializeSecurityContext failed: %s", - Curl_sspi_strerror(conn, sspi_status)); - Curl_safefree(connssl->ctxt); - return CURLE_SSL_CONNECT_ERROR; - } - - infof(data, "schannel: sending initial handshake data: " - "sending %lu bytes...\n", outbuf.cbBuffer); - - /* send initial handshake data which is now stored in output buffer */ - code = Curl_write_plain(conn, conn->sock[sockindex], outbuf.pvBuffer, - outbuf.cbBuffer, &written); - s_pSecFn->FreeContextBuffer(outbuf.pvBuffer); - if((code != CURLE_OK) || (outbuf.cbBuffer != (size_t)written)) { - failf(data, "schannel: failed to send initial handshake data: " - "sent %zd of %lu bytes", written, outbuf.cbBuffer); - return CURLE_SSL_CONNECT_ERROR; - } - - infof(data, "schannel: sent initial handshake data: " - "sent %zd bytes\n", written); - - /* continue to second handshake step */ - connssl->connecting_state = ssl_connect_2; - - return CURLE_OK; -} - -static CURLcode -schannel_connect_step2(struct connectdata *conn, int sockindex) -{ - int i; - ssize_t nread = -1, written = -1; - struct SessionHandle *data = conn->data; - struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - SecBuffer outbuf[2]; - SecBufferDesc outbuf_desc; - SecBuffer inbuf[2]; - SecBufferDesc inbuf_desc; - SECURITY_STATUS sspi_status = SEC_E_OK; - TCHAR *host_name; - CURLcode code; - bool doread; - - doread = (connssl->connecting_state != ssl_connect_2_writing) ? TRUE : FALSE; - - infof(data, "schannel: SSL/TLS connection with %s port %hu (step 2/3)\n", - conn->host.name, conn->remote_port); - - /* buffer to store previously received and encrypted data */ - if(connssl->encdata_buffer == NULL) { - connssl->encdata_offset = 0; - connssl->encdata_length = CURL_SCHANNEL_BUFFER_INIT_SIZE; - connssl->encdata_buffer = malloc(connssl->encdata_length); - if(connssl->encdata_buffer == NULL) { - failf(data, "schannel: unable to allocate memory"); - return CURLE_OUT_OF_MEMORY; - } - } - - /* if we need a bigger buffer to read a full message, increase buffer now */ - if(connssl->encdata_length - connssl->encdata_offset < - CURL_SCHANNEL_BUFFER_FREE_SIZE) { - /* increase internal encrypted data buffer */ - connssl->encdata_length *= CURL_SCHANNEL_BUFFER_STEP_FACTOR; - connssl->encdata_buffer = realloc(connssl->encdata_buffer, - connssl->encdata_length); - - if(connssl->encdata_buffer == NULL) { - failf(data, "schannel: unable to re-allocate memory"); - return CURLE_OUT_OF_MEMORY; - } - } - - for(;;) { - if(doread) { - /* read encrypted handshake data from socket */ - code = Curl_read_plain(conn->sock[sockindex], - (char *) (connssl->encdata_buffer + connssl->encdata_offset), - connssl->encdata_length - connssl->encdata_offset, - &nread); - if(code == CURLE_AGAIN) { - if(connssl->connecting_state != ssl_connect_2_writing) - connssl->connecting_state = ssl_connect_2_reading; - infof(data, "schannel: failed to receive handshake, " - "need more data\n"); - return CURLE_OK; - } - else if((code != CURLE_OK) || (nread == 0)) { - failf(data, "schannel: failed to receive handshake, " - "SSL/TLS connection failed"); - return CURLE_SSL_CONNECT_ERROR; - } - - /* increase encrypted data buffer offset */ - connssl->encdata_offset += nread; - } - - infof(data, "schannel: encrypted data buffer: offset %zu length %zu\n", - connssl->encdata_offset, connssl->encdata_length); - - /* setup input buffers */ - InitSecBuffer(&inbuf[0], SECBUFFER_TOKEN, malloc(connssl->encdata_offset), - curlx_uztoul(connssl->encdata_offset)); - InitSecBuffer(&inbuf[1], SECBUFFER_EMPTY, NULL, 0); - InitSecBufferDesc(&inbuf_desc, inbuf, 2); - - /* setup output buffers */ - InitSecBuffer(&outbuf[0], SECBUFFER_TOKEN, NULL, 0); - InitSecBuffer(&outbuf[1], SECBUFFER_ALERT, NULL, 0); - InitSecBufferDesc(&outbuf_desc, outbuf, 2); - - if(inbuf[0].pvBuffer == NULL) { - failf(data, "schannel: unable to allocate memory"); - return CURLE_OUT_OF_MEMORY; - } - - /* copy received handshake data into input buffer */ - memcpy(inbuf[0].pvBuffer, connssl->encdata_buffer, - connssl->encdata_offset); - - host_name = Curl_convert_UTF8_to_tchar(conn->host.name); - if(!host_name) - return CURLE_OUT_OF_MEMORY; - - /* http://msdn.microsoft.com/en-us/library/windows/desktop/aa375924.aspx */ - - sspi_status = s_pSecFn->InitializeSecurityContext( - &connssl->cred->cred_handle, &connssl->ctxt->ctxt_handle, - host_name, connssl->req_flags, 0, 0, &inbuf_desc, 0, NULL, - &outbuf_desc, &connssl->ret_flags, &connssl->ctxt->time_stamp); - - Curl_unicodefree(host_name); - - /* free buffer for received handshake data */ - Curl_safefree(inbuf[0].pvBuffer); - - /* check if the handshake was incomplete */ - if(sspi_status == SEC_E_INCOMPLETE_MESSAGE) { - connssl->connecting_state = ssl_connect_2_reading; - infof(data, "schannel: received incomplete message, need more data\n"); - return CURLE_OK; - } - - /* check if the handshake needs to be continued */ - if(sspi_status == SEC_I_CONTINUE_NEEDED || sspi_status == SEC_E_OK) { - for(i = 0; i < 2; i++) { - /* search for handshake tokens that need to be send */ - if(outbuf[i].BufferType == SECBUFFER_TOKEN && outbuf[i].cbBuffer > 0) { - infof(data, "schannel: sending next handshake data: " - "sending %lu bytes...\n", outbuf[i].cbBuffer); - - /* send handshake token to server */ - code = Curl_write_plain(conn, conn->sock[sockindex], - outbuf[i].pvBuffer, outbuf[i].cbBuffer, - &written); - if((code != CURLE_OK) || (outbuf[i].cbBuffer != (size_t)written)) { - failf(data, "schannel: failed to send next handshake data: " - "sent %zd of %lu bytes", written, outbuf[i].cbBuffer); - return CURLE_SSL_CONNECT_ERROR; - } - } - - /* free obsolete buffer */ - if(outbuf[i].pvBuffer != NULL) { - s_pSecFn->FreeContextBuffer(outbuf[i].pvBuffer); - } - } - } - else { - if(sspi_status == SEC_E_WRONG_PRINCIPAL) - failf(data, "schannel: SNI or certificate check failed: %s", - Curl_sspi_strerror(conn, sspi_status)); - else - failf(data, "schannel: next InitializeSecurityContext failed: %s", - Curl_sspi_strerror(conn, sspi_status)); - return CURLE_SSL_CONNECT_ERROR; - } - - /* check if there was additional remaining encrypted data */ - if(inbuf[1].BufferType == SECBUFFER_EXTRA && inbuf[1].cbBuffer > 0) { - infof(data, "schannel: encrypted data length: %lu\n", inbuf[1].cbBuffer); - /* - There are two cases where we could be getting extra data here: - 1) If we're renegotiating a connection and the handshake is already - complete (from the server perspective), it can encrypted app data - (not handshake data) in an extra buffer at this point. - 2) (sspi_status == SEC_I_CONTINUE_NEEDED) We are negotiating a - connection and this extra data is part of the handshake. - We should process the data immediately; waiting for the socket to - be ready may fail since the server is done sending handshake data. - */ - /* check if the remaining data is less than the total amount - and therefore begins after the already processed data */ - if(connssl->encdata_offset > inbuf[1].cbBuffer) { - memmove(connssl->encdata_buffer, - (connssl->encdata_buffer + connssl->encdata_offset) - - inbuf[1].cbBuffer, inbuf[1].cbBuffer); - connssl->encdata_offset = inbuf[1].cbBuffer; - if(sspi_status == SEC_I_CONTINUE_NEEDED) { - doread = FALSE; - continue; - } - } - } - else { - connssl->encdata_offset = 0; - } - break; - } - - /* check if the handshake needs to be continued */ - if(sspi_status == SEC_I_CONTINUE_NEEDED) { - connssl->connecting_state = ssl_connect_2_reading; - return CURLE_OK; - } - - /* check if the handshake is complete */ - if(sspi_status == SEC_E_OK) { - connssl->connecting_state = ssl_connect_3; - infof(data, "schannel: SSL/TLS handshake complete\n"); - } - -#ifdef _WIN32_WCE - /* Windows CE doesn't do any server certificate validation. - We have to do it manually. */ - if(data->set.ssl.verifypeer) - return verify_certificate(conn, sockindex); -#endif - - return CURLE_OK; -} - -static CURLcode -schannel_connect_step3(struct connectdata *conn, int sockindex) -{ - CURLcode retcode = CURLE_OK; - struct SessionHandle *data = conn->data; - struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - struct curl_schannel_cred *old_cred = NULL; - int incache; - - DEBUGASSERT(ssl_connect_3 == connssl->connecting_state); - - infof(data, "schannel: SSL/TLS connection with %s port %hu (step 3/3)\n", - conn->host.name, conn->remote_port); - - /* check if the required context attributes are met */ - if(connssl->ret_flags != connssl->req_flags) { - if(!(connssl->ret_flags & ISC_RET_SEQUENCE_DETECT)) - failf(data, "schannel: failed to setup sequence detection"); - if(!(connssl->ret_flags & ISC_RET_REPLAY_DETECT)) - failf(data, "schannel: failed to setup replay detection"); - if(!(connssl->ret_flags & ISC_RET_CONFIDENTIALITY)) - failf(data, "schannel: failed to setup confidentiality"); - if(!(connssl->ret_flags & ISC_RET_ALLOCATED_MEMORY)) - failf(data, "schannel: failed to setup memory allocation"); - if(!(connssl->ret_flags & ISC_RET_STREAM)) - failf(data, "schannel: failed to setup stream orientation"); - return CURLE_SSL_CONNECT_ERROR; - } - - /* increment the reference counter of the credential/session handle */ - if(connssl->cred && connssl->ctxt) { - connssl->cred->refcount++; - infof(data, "schannel: incremented credential handle refcount = %d\n", - connssl->cred->refcount); - } - - /* save the current session data for possible re-use */ - incache = !(Curl_ssl_getsessionid(conn, (void**)&old_cred, NULL)); - if(incache) { - if(old_cred != connssl->cred) { - infof(data, "schannel: old credential handle is stale, removing\n"); - Curl_ssl_delsessionid(conn, (void*)old_cred); - incache = FALSE; - } - } - if(!incache) { - retcode = Curl_ssl_addsessionid(conn, (void*)connssl->cred, - sizeof(struct curl_schannel_cred)); - if(retcode) { - failf(data, "schannel: failed to store credential handle"); - return retcode; - } - else { - infof(data, "schannel: stored credential handle in session cache\n"); - } - } - - connssl->connecting_state = ssl_connect_done; - - return CURLE_OK; -} - -static CURLcode -schannel_connect_common(struct connectdata *conn, int sockindex, - bool nonblocking, bool *done) -{ - CURLcode retcode; - struct SessionHandle *data = conn->data; - struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - curl_socket_t sockfd = conn->sock[sockindex]; - long timeout_ms; - int what; - - /* check if the connection has already been established */ - if(ssl_connection_complete == connssl->state) { - *done = TRUE; - return CURLE_OK; - } - - if(ssl_connect_1 == connssl->connecting_state) { - /* check out how much more time we're allowed */ - timeout_ms = Curl_timeleft(data, NULL, TRUE); - - if(timeout_ms < 0) { - /* no need to continue if time already is up */ - failf(data, "SSL/TLS connection timeout"); - return CURLE_OPERATION_TIMEDOUT; - } - - retcode = schannel_connect_step1(conn, sockindex); - if(retcode) - return retcode; - } - - while(ssl_connect_2 == connssl->connecting_state || - ssl_connect_2_reading == connssl->connecting_state || - ssl_connect_2_writing == connssl->connecting_state) { - - /* check out how much more time we're allowed */ - timeout_ms = Curl_timeleft(data, NULL, TRUE); - - if(timeout_ms < 0) { - /* no need to continue if time already is up */ - failf(data, "SSL/TLS connection timeout"); - return CURLE_OPERATION_TIMEDOUT; - } - - /* if ssl is expecting something, check if it's available. */ - if(connssl->connecting_state == ssl_connect_2_reading - || connssl->connecting_state == ssl_connect_2_writing) { - - curl_socket_t writefd = ssl_connect_2_writing == - connssl->connecting_state ? sockfd : CURL_SOCKET_BAD; - curl_socket_t readfd = ssl_connect_2_reading == - connssl->connecting_state ? sockfd : CURL_SOCKET_BAD; - - what = Curl_socket_ready(readfd, writefd, nonblocking ? 0 : timeout_ms); - if(what < 0) { - /* fatal error */ - failf(data, "select/poll on SSL/TLS socket, errno: %d", SOCKERRNO); - return CURLE_SSL_CONNECT_ERROR; - } - else if(0 == what) { - if(nonblocking) { - *done = FALSE; - return CURLE_OK; - } - else { - /* timeout */ - failf(data, "SSL/TLS connection timeout"); - return CURLE_OPERATION_TIMEDOUT; - } - } - /* socket is readable or writable */ - } - - /* Run transaction, and return to the caller if it failed or if - * this connection is part of a multi handle and this loop would - * execute again. This permits the owner of a multi handle to - * abort a connection attempt before step2 has completed while - * ensuring that a client using select() or epoll() will always - * have a valid fdset to wait on. - */ - retcode = schannel_connect_step2(conn, sockindex); - if(retcode || (nonblocking && - (ssl_connect_2 == connssl->connecting_state || - ssl_connect_2_reading == connssl->connecting_state || - ssl_connect_2_writing == connssl->connecting_state))) - return retcode; - - } /* repeat step2 until all transactions are done. */ - - if(ssl_connect_3 == connssl->connecting_state) { - retcode = schannel_connect_step3(conn, sockindex); - if(retcode) - return retcode; - } - - if(ssl_connect_done == connssl->connecting_state) { - connssl->state = ssl_connection_complete; - conn->recv[sockindex] = schannel_recv; - conn->send[sockindex] = schannel_send; - *done = TRUE; - } - else - *done = FALSE; - - /* reset our connection state machine */ - connssl->connecting_state = ssl_connect_1; - - return CURLE_OK; -} - -static ssize_t -schannel_send(struct connectdata *conn, int sockindex, - const void *buf, size_t len, CURLcode *err) -{ - ssize_t written = -1; - size_t data_len = 0; - unsigned char *data = NULL; - struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - SecBuffer outbuf[4]; - SecBufferDesc outbuf_desc; - SECURITY_STATUS sspi_status = SEC_E_OK; - CURLcode code; - - /* check if the maximum stream sizes were queried */ - if(connssl->stream_sizes.cbMaximumMessage == 0) { - sspi_status = s_pSecFn->QueryContextAttributes( - &connssl->ctxt->ctxt_handle, - SECPKG_ATTR_STREAM_SIZES, - &connssl->stream_sizes); - if(sspi_status != SEC_E_OK) { - *err = CURLE_SEND_ERROR; - return -1; - } - } - - /* check if the buffer is longer than the maximum message length */ - if(len > connssl->stream_sizes.cbMaximumMessage) { - *err = CURLE_SEND_ERROR; - return -1; - } - - /* calculate the complete message length and allocate a buffer for it */ - data_len = connssl->stream_sizes.cbHeader + len + - connssl->stream_sizes.cbTrailer; - data = (unsigned char*) malloc(data_len); - if(data == NULL) { - *err = CURLE_OUT_OF_MEMORY; - return -1; - } - - /* setup output buffers (header, data, trailer, empty) */ - InitSecBuffer(&outbuf[0], SECBUFFER_STREAM_HEADER, - data, connssl->stream_sizes.cbHeader); - InitSecBuffer(&outbuf[1], SECBUFFER_DATA, - data + connssl->stream_sizes.cbHeader, curlx_uztoul(len)); - InitSecBuffer(&outbuf[2], SECBUFFER_STREAM_TRAILER, - data + connssl->stream_sizes.cbHeader + len, - connssl->stream_sizes.cbTrailer); - InitSecBuffer(&outbuf[3], SECBUFFER_EMPTY, NULL, 0); - InitSecBufferDesc(&outbuf_desc, outbuf, 4); - - /* copy data into output buffer */ - memcpy(outbuf[1].pvBuffer, buf, len); - - /* http://msdn.microsoft.com/en-us/library/windows/desktop/aa375390.aspx */ - sspi_status = s_pSecFn->EncryptMessage(&connssl->ctxt->ctxt_handle, 0, - &outbuf_desc, 0); - - /* check if the message was encrypted */ - if(sspi_status == SEC_E_OK) { - written = 0; - - /* send the encrypted message including header, data and trailer */ - len = outbuf[0].cbBuffer + outbuf[1].cbBuffer + outbuf[2].cbBuffer; - - /* - It's important to send the full message which includes the header, - encrypted payload, and trailer. Until the client receives all the - data a coherent message has not been delivered and the client - can't read any of it. - - If we wanted to buffer the unwritten encrypted bytes, we would - tell the client that all data it has requested to be sent has been - sent. The unwritten encrypted bytes would be the first bytes to - send on the next invocation. - Here's the catch with this - if we tell the client that all the - bytes have been sent, will the client call this method again to - send the buffered data? Looking at who calls this function, it - seems the answer is NO. - */ - - /* send entire message or fail */ - while(len > (size_t)written) { - ssize_t this_write; - long timeleft; - int what; - - this_write = 0; - - timeleft = Curl_timeleft(conn->data, NULL, TRUE); - if(timeleft < 0) { - /* we already got the timeout */ - failf(conn->data, "schannel: timed out sending data " - "(bytes sent: %zd)", written); - *err = CURLE_OPERATION_TIMEDOUT; - written = -1; - break; - } - - what = Curl_socket_ready(CURL_SOCKET_BAD, conn->sock[sockindex], - timeleft); - if(what < 0) { - /* fatal error */ - failf(conn->data, "select/poll on SSL socket, errno: %d", SOCKERRNO); - *err = CURLE_SEND_ERROR; - written = -1; - break; - } - else if(0 == what) { - failf(conn->data, "schannel: timed out sending data " - "(bytes sent: %zd)", written); - *err = CURLE_OPERATION_TIMEDOUT; - written = -1; - break; - } - /* socket is writable */ - - code = Curl_write_plain(conn, conn->sock[sockindex], data + written, - len - written, &this_write); - if(code == CURLE_AGAIN) - continue; - else if(code != CURLE_OK) { - *err = code; - written = -1; - break; - } - - written += this_write; - } - } - else if(sspi_status == SEC_E_INSUFFICIENT_MEMORY) { - *err = CURLE_OUT_OF_MEMORY; - } - else{ - *err = CURLE_SEND_ERROR; - } - - Curl_safefree(data); - - if(len == (size_t)written) - /* Encrypted message including header, data and trailer entirely sent. - The return value is the number of unencrypted bytes that were sent. */ - written = outbuf[1].cbBuffer; - - return written; -} - -static ssize_t -schannel_recv(struct connectdata *conn, int sockindex, - char *buf, size_t len, CURLcode *err) -{ - size_t size = 0; - ssize_t nread = 0, ret = -1; - CURLcode retcode; - struct SessionHandle *data = conn->data; - struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - bool done = FALSE; - SecBuffer inbuf[4]; - SecBufferDesc inbuf_desc; - SECURITY_STATUS sspi_status = SEC_E_OK; - - infof(data, "schannel: client wants to read %zu bytes\n", len); - *err = CURLE_OK; - - /* buffer to store previously received and decrypted data */ - if(connssl->decdata_buffer == NULL) { - connssl->decdata_offset = 0; - connssl->decdata_length = CURL_SCHANNEL_BUFFER_INIT_SIZE; - connssl->decdata_buffer = malloc(connssl->decdata_length); - if(connssl->decdata_buffer == NULL) { - failf(data, "schannel: unable to allocate memory"); - *err = CURLE_OUT_OF_MEMORY; - return -1; - } - } - - /* increase buffer in order to fit the requested amount of data */ - while(connssl->encdata_length - connssl->encdata_offset < - CURL_SCHANNEL_BUFFER_FREE_SIZE || connssl->encdata_length < len) { - /* increase internal encrypted data buffer */ - connssl->encdata_length *= CURL_SCHANNEL_BUFFER_STEP_FACTOR; - connssl->encdata_buffer = realloc(connssl->encdata_buffer, - connssl->encdata_length); - - if(connssl->encdata_buffer == NULL) { - failf(data, "schannel: unable to re-allocate memory"); - *err = CURLE_OUT_OF_MEMORY; - return -1; - } - } - - /* read encrypted data from socket */ - infof(data, "schannel: encrypted data buffer: offset %zu length %zu\n", - connssl->encdata_offset, connssl->encdata_length); - size = connssl->encdata_length - connssl->encdata_offset; - if(size > 0) { - *err = Curl_read_plain(conn->sock[sockindex], - (char *) (connssl->encdata_buffer + connssl->encdata_offset), - size, &nread); - /* check for received data */ - if(*err != CURLE_OK) - ret = -1; - else { - if(nread > 0) - /* increase encrypted data buffer offset */ - connssl->encdata_offset += nread; - ret = nread; - } - infof(data, "schannel: encrypted data got %zd\n", ret); - } - - infof(data, "schannel: encrypted data buffer: offset %zu length %zu\n", - connssl->encdata_offset, connssl->encdata_length); - - /* check if we still have some data in our buffers */ - while(connssl->encdata_offset > 0 && sspi_status == SEC_E_OK && - connssl->decdata_offset < len) { - /* prepare data buffer for DecryptMessage call */ - InitSecBuffer(&inbuf[0], SECBUFFER_DATA, connssl->encdata_buffer, - curlx_uztoul(connssl->encdata_offset)); - - /* we need 3 more empty input buffers for possible output */ - InitSecBuffer(&inbuf[1], SECBUFFER_EMPTY, NULL, 0); - InitSecBuffer(&inbuf[2], SECBUFFER_EMPTY, NULL, 0); - InitSecBuffer(&inbuf[3], SECBUFFER_EMPTY, NULL, 0); - - InitSecBufferDesc(&inbuf_desc, inbuf, 4); - - /* http://msdn.microsoft.com/en-us/library/windows/desktop/aa375348.aspx */ - sspi_status = s_pSecFn->DecryptMessage(&connssl->ctxt->ctxt_handle, - &inbuf_desc, 0, NULL); - - /* check if we need more data */ - if(sspi_status == SEC_E_INCOMPLETE_MESSAGE) { - infof(data, "schannel: failed to decrypt data, need more data\n"); - *err = CURLE_AGAIN; - return -1; - } - - /* check if everything went fine (server may want to renegotiate - context) */ - if(sspi_status == SEC_E_OK || sspi_status == SEC_I_RENEGOTIATE || - sspi_status == SEC_I_CONTEXT_EXPIRED) { - /* check for successfully decrypted data */ - if(inbuf[1].BufferType == SECBUFFER_DATA) { - infof(data, "schannel: decrypted data length: %lu\n", - inbuf[1].cbBuffer); - - /* increase buffer in order to fit the received amount of data */ - size = inbuf[1].cbBuffer > CURL_SCHANNEL_BUFFER_FREE_SIZE ? - inbuf[1].cbBuffer : CURL_SCHANNEL_BUFFER_FREE_SIZE; - while(connssl->decdata_length - connssl->decdata_offset < size || - connssl->decdata_length < len) { - /* increase internal decrypted data buffer */ - connssl->decdata_length *= CURL_SCHANNEL_BUFFER_STEP_FACTOR; - connssl->decdata_buffer = realloc(connssl->decdata_buffer, - connssl->decdata_length); - - if(connssl->decdata_buffer == NULL) { - failf(data, "schannel: unable to re-allocate memory"); - *err = CURLE_OUT_OF_MEMORY; - return -1; - } - } - - /* copy decrypted data to internal buffer */ - size = inbuf[1].cbBuffer; - if(size > 0) { - memcpy(connssl->decdata_buffer + connssl->decdata_offset, - inbuf[1].pvBuffer, size); - connssl->decdata_offset += size; - } - - infof(data, "schannel: decrypted data added: %zu\n", size); - infof(data, "schannel: decrypted data cached: offset %zu length %zu\n", - connssl->decdata_offset, connssl->decdata_length); - } - - /* check for remaining encrypted data */ - if(inbuf[3].BufferType == SECBUFFER_EXTRA && inbuf[3].cbBuffer > 0) { - infof(data, "schannel: encrypted data length: %lu\n", - inbuf[3].cbBuffer); - - /* check if the remaining data is less than the total amount - * and therefore begins after the already processed data - */ - if(connssl->encdata_offset > inbuf[3].cbBuffer) { - /* move remaining encrypted data forward to the beginning of - buffer */ - memmove(connssl->encdata_buffer, - (connssl->encdata_buffer + connssl->encdata_offset) - - inbuf[3].cbBuffer, inbuf[3].cbBuffer); - connssl->encdata_offset = inbuf[3].cbBuffer; - } - - infof(data, "schannel: encrypted data cached: offset %zu length %zu\n", - connssl->encdata_offset, connssl->encdata_length); - } - else{ - /* reset encrypted buffer offset, because there is no data remaining */ - connssl->encdata_offset = 0; - } - } - - /* check if server wants to renegotiate the connection context */ - if(sspi_status == SEC_I_RENEGOTIATE) { - infof(data, "schannel: remote party requests SSL/TLS renegotiation\n"); - - /* begin renegotiation */ - infof(data, "schannel: renegotiating SSL/TLS connection\n"); - connssl->state = ssl_connection_negotiating; - connssl->connecting_state = ssl_connect_2_writing; - retcode = schannel_connect_common(conn, sockindex, FALSE, &done); - if(retcode) - *err = retcode; - else { - infof(data, "schannel: SSL/TLS connection renegotiated\n"); - /* now retry receiving data */ - return schannel_recv(conn, sockindex, buf, len, err); - } - } - } - - infof(data, "schannel: decrypted data buffer: offset %zu length %zu\n", - connssl->decdata_offset, connssl->decdata_length); - - /* copy requested decrypted data to supplied buffer */ - size = len < connssl->decdata_offset ? len : connssl->decdata_offset; - if(size > 0) { - memcpy(buf, connssl->decdata_buffer, size); - ret = size; - - /* move remaining decrypted data forward to the beginning of buffer */ - memmove(connssl->decdata_buffer, connssl->decdata_buffer + size, - connssl->decdata_offset - size); - connssl->decdata_offset -= size; - - infof(data, "schannel: decrypted data returned %zd\n", size); - infof(data, "schannel: decrypted data buffer: offset %zu length %zu\n", - connssl->decdata_offset, connssl->decdata_length); - } - - /* check if the server closed the connection */ - if(ret <= 0 && ( /* special check for Windows 2000 Professional */ - sspi_status == SEC_I_CONTEXT_EXPIRED || (sspi_status == SEC_E_OK && - connssl->encdata_offset > 0 && connssl->encdata_buffer[0] == 0x15))) { - infof(data, "schannel: server closed the connection\n"); - *err = CURLE_OK; - return 0; - } - - /* check if something went wrong and we need to return an error */ - if(ret < 0 && sspi_status != SEC_E_OK) { - infof(data, "schannel: failed to read data from server: %s\n", - Curl_sspi_strerror(conn, sspi_status)); - *err = CURLE_RECV_ERROR; - return -1; - } - - return ret; -} - -CURLcode -Curl_schannel_connect_nonblocking(struct connectdata *conn, int sockindex, - bool *done) -{ - return schannel_connect_common(conn, sockindex, TRUE, done); -} - -CURLcode -Curl_schannel_connect(struct connectdata *conn, int sockindex) -{ - CURLcode retcode; - bool done = FALSE; - - retcode = schannel_connect_common(conn, sockindex, FALSE, &done); - if(retcode) - return retcode; - - DEBUGASSERT(done); - - return CURLE_OK; -} - -bool Curl_schannel_data_pending(const struct connectdata *conn, int sockindex) -{ - const struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - - if(connssl->use) /* SSL/TLS is in use */ - return (connssl->encdata_offset > 0 || - connssl->decdata_offset > 0 ) ? TRUE : FALSE; - else - return FALSE; -} - -void Curl_schannel_close(struct connectdata *conn, int sockindex) -{ - if(conn->ssl[sockindex].use) - /* if the SSL/TLS channel hasn't been shut down yet, do that now. */ - Curl_ssl_shutdown(conn, sockindex); -} - -int Curl_schannel_shutdown(struct connectdata *conn, int sockindex) -{ - /* See http://msdn.microsoft.com/en-us/library/windows/desktop/aa380138.aspx - * Shutting Down an Schannel Connection - */ - struct SessionHandle *data = conn->data; - struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - - infof(data, "schannel: shutting down SSL/TLS connection with %s port %hu\n", - conn->host.name, conn->remote_port); - - if(connssl->cred && connssl->ctxt) { - SecBufferDesc BuffDesc; - SecBuffer Buffer; - SECURITY_STATUS sspi_status; - SecBuffer outbuf; - SecBufferDesc outbuf_desc; - CURLcode code; - TCHAR *host_name; - DWORD dwshut = SCHANNEL_SHUTDOWN; - - InitSecBuffer(&Buffer, SECBUFFER_TOKEN, &dwshut, sizeof(dwshut)); - InitSecBufferDesc(&BuffDesc, &Buffer, 1); - - sspi_status = s_pSecFn->ApplyControlToken(&connssl->ctxt->ctxt_handle, - &BuffDesc); - - if(sspi_status != SEC_E_OK) - failf(data, "schannel: ApplyControlToken failure: %s", - Curl_sspi_strerror(conn, sspi_status)); - - host_name = Curl_convert_UTF8_to_tchar(conn->host.name); - if(!host_name) - return CURLE_OUT_OF_MEMORY; - - /* setup output buffer */ - InitSecBuffer(&outbuf, SECBUFFER_EMPTY, NULL, 0); - InitSecBufferDesc(&outbuf_desc, &outbuf, 1); - - sspi_status = s_pSecFn->InitializeSecurityContext( - &connssl->cred->cred_handle, - &connssl->ctxt->ctxt_handle, - host_name, - connssl->req_flags, - 0, - 0, - NULL, - 0, - &connssl->ctxt->ctxt_handle, - &outbuf_desc, - &connssl->ret_flags, - &connssl->ctxt->time_stamp); - - Curl_unicodefree(host_name); - - if((sspi_status == SEC_E_OK) || (sspi_status == SEC_I_CONTEXT_EXPIRED)) { - /* send close message which is in output buffer */ - ssize_t written; - code = Curl_write_plain(conn, conn->sock[sockindex], outbuf.pvBuffer, - outbuf.cbBuffer, &written); - - s_pSecFn->FreeContextBuffer(outbuf.pvBuffer); - if((code != CURLE_OK) || (outbuf.cbBuffer != (size_t)written)) { - infof(data, "schannel: failed to send close msg: %s" - " (bytes written: %zd)\n", curl_easy_strerror(code), written); - } - } - - /* free SSPI Schannel API security context handle */ - if(connssl->ctxt) { - s_pSecFn->DeleteSecurityContext(&connssl->ctxt->ctxt_handle); - Curl_safefree(connssl->ctxt); - } - - /* decrement the reference counter of the credential/session handle */ - if(connssl->cred && connssl->cred->refcount > 0) { - connssl->cred->refcount--; - infof(data, "schannel: decremented credential handle refcount = %d\n", - connssl->cred->refcount); - } - } - - /* free internal buffer for received encrypted data */ - if(connssl->encdata_buffer != NULL) { - Curl_safefree(connssl->encdata_buffer); - connssl->encdata_length = 0; - connssl->encdata_offset = 0; - } - - /* free internal buffer for received decrypted data */ - if(connssl->decdata_buffer != NULL) { - Curl_safefree(connssl->decdata_buffer); - connssl->decdata_length = 0; - connssl->decdata_offset = 0; - } - - return CURLE_OK; -} - -void Curl_schannel_session_free(void *ptr) -{ - struct curl_schannel_cred *cred = ptr; - - if(cred && cred->refcount == 0) { - s_pSecFn->FreeCredentialsHandle(&cred->cred_handle); - Curl_safefree(cred); - } -} - -int Curl_schannel_init(void) -{ - return (Curl_sspi_global_init() == CURLE_OK ? 1 : 0); -} - -void Curl_schannel_cleanup(void) -{ - Curl_sspi_global_cleanup(); -} - -size_t Curl_schannel_version(char *buffer, size_t size) -{ - size = snprintf(buffer, size, "WinSSL"); - - return size; -} - -#ifdef _WIN32_WCE -static CURLcode verify_certificate(struct connectdata *conn, int sockindex) -{ - SECURITY_STATUS status; - struct SessionHandle *data = conn->data; - struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - CURLcode result = CURLE_OK; - CERT_CONTEXT *pCertContextServer = NULL; - const CERT_CHAIN_CONTEXT *pChainContext = NULL; - - status = s_pSecFn->QueryContextAttributes(&connssl->ctxt->ctxt_handle, - SECPKG_ATTR_REMOTE_CERT_CONTEXT, - &pCertContextServer); - - if((status != SEC_E_OK) || (pCertContextServer == NULL)) { - failf(data, "schannel: Failed to read remote certificate context: %s", - Curl_sspi_strerror(conn, status)); - result = CURLE_PEER_FAILED_VERIFICATION; - } - - if(result == CURLE_OK) { - CERT_CHAIN_PARA ChainPara; - memset(&ChainPara, 0, sizeof(ChainPara)); - ChainPara.cbSize = sizeof(ChainPara); - - if(!CertGetCertificateChain(NULL, - pCertContextServer, - NULL, - pCertContextServer->hCertStore, - &ChainPara, - 0, - NULL, - &pChainContext)) { - failf(data, "schannel: CertGetCertificateChain failed: %s", - Curl_sspi_strerror(conn, GetLastError())); - 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| - CERT_TRUST_REVOCATION_STATUS_UNKNOWN); - dwTrustErrorMask &= pSimpleChain->TrustStatus.dwErrorStatus; - if(dwTrustErrorMask) { - if(dwTrustErrorMask & CERT_TRUST_IS_PARTIAL_CHAIN) - failf(data, "schannel: CertGetCertificateChain trust error" - " CERT_TRUST_IS_PARTIAL_CHAIN"); - if(dwTrustErrorMask & CERT_TRUST_IS_UNTRUSTED_ROOT) - failf(data, "schannel: CertGetCertificateChain trust error" - " CERT_TRUST_IS_UNTRUSTED_ROOT"); - if(dwTrustErrorMask & CERT_TRUST_IS_NOT_TIME_VALID) - failf(data, "schannel: CertGetCertificateChain trust error" - " CERT_TRUST_IS_NOT_TIME_VALID"); - failf(data, "schannel: CertGetCertificateChain error mask: 0x%08x", - dwTrustErrorMask); - result = CURLE_PEER_FAILED_VERIFICATION; - } - } - } - - if(result == CURLE_OK) { - if(data->set.ssl.verifyhost) { - TCHAR cert_hostname_buff[128]; - xcharp_u hostname; - xcharp_u cert_hostname; - DWORD len; - - cert_hostname.const_tchar_ptr = cert_hostname_buff; - hostname.tchar_ptr = Curl_convert_UTF8_to_tchar(conn->host.name); - - len = CertGetNameString(pCertContextServer, - CERT_NAME_DNS_TYPE, - 0, - NULL, - cert_hostname.tchar_ptr, - 128); - if(len > 0 && *cert_hostname.tchar_ptr == '*') { - /* this is a wildcard cert. try matching the last len - 1 chars */ - int hostname_len = strlen(conn->host.name); - cert_hostname.tchar_ptr++; - if(_tcsicmp(cert_hostname.const_tchar_ptr, - hostname.const_tchar_ptr + hostname_len - len + 2) != 0) - result = CURLE_PEER_FAILED_VERIFICATION; - } - else if(len == 0 || _tcsicmp(hostname.const_tchar_ptr, - cert_hostname.const_tchar_ptr) != 0) { - result = CURLE_PEER_FAILED_VERIFICATION; - } - if(result == CURLE_PEER_FAILED_VERIFICATION) { - char *_cert_hostname; - _cert_hostname = Curl_convert_tchar_to_UTF8(cert_hostname.tchar_ptr); - failf(data, "schannel: CertGetNameString() certificate hostname " - "(%s) did not match connection (%s)", - _cert_hostname, conn->host.name); - Curl_unicodefree(_cert_hostname); - } - Curl_unicodefree(hostname.tchar_ptr); - } - } - - if(pChainContext) - CertFreeCertificateChain(pChainContext); - - if(pCertContextServer) - CertFreeCertificateContext(pCertContextServer); - - return result; -} -#endif /* _WIN32_WCE */ - -#endif /* USE_SCHANNEL */ |