mirror of
https://github.com/moparisthebest/curl
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schannel: Added SSL/TLS support with Microsoft Windows Schannel SSPI
This commit is contained in:
Marc Hoersken
Daniel Stenberg
parent
1f635608bb
commit
aaa42aa0d5
848
lib/curl_schannel.c
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848
lib/curl_schannel.c
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@ -0,0 +1,848 @@
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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) 2012, Marc Hoersken, <info@marc-hoersken.de>, 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 http://curl.haxx.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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***************************************************************************/
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/*
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* Source file for all SChannel-specific code for the TLS/SSL layer. No code
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* but sslgen.c should ever call or use these functions.
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*
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*/
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/*
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* Based upon the PolarSSL implementation in polarssl.c and polarssl.h:
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* Copyright (C) 2010, 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com>
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*
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* Based upon the CyaSSL implementation in cyassl.c and cyassl.h:
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* Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* Thanks for code and inspiration!
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*/
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/*
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* TODO list for TLS/SSL implementation:
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* - implement session handling and re-use
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* - implement write buffering
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* - implement verification options
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* - implement verification results
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* - implement SSL/TLS shutdown
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* - special cases: negotiation, certificates, algorithms
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*/
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#include "setup.h"
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#ifdef USE_WINDOWS_SSPI
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#ifdef USE_SCHANNEL
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#include <schnlsp.h>
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#include "urldata.h"
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#include "curl_sspi.h"
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#include "curl_schannel.h"
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#include "sslgen.h"
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#include "sendf.h"
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#include "connect.h" /* for the connect timeout */
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#include "select.h" /* for the socket readyness */
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#include "inet_pton.h" /* for IP addr SNI check */
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#define _MPRINTF_REPLACE /* use our functions only */
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#include <curl/mprintf.h>
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#include "curl_memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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/* Uncomment to force verbose output
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* #define infof(x, y, ...) printf(y, __VA_ARGS__)
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* #define failf(x, y, ...) printf(y, __VA_ARGS__)
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*/
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static Curl_recv schannel_recv;
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static Curl_send schannel_send;
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static CURLcode
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schannel_connect_step1(struct connectdata *conn, int sockindex) {
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ssize_t write = -1;
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struct SessionHandle *data = conn->data;
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struct ssl_connect_data* connssl = &conn->ssl[sockindex];
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SecBuffer outbuf;
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SecBufferDesc outbuf_desc;
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SCHANNEL_CRED schannel_cred;
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SECURITY_STATUS sspi_status = SEC_E_OK;
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struct in_addr addr;
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#ifdef ENABLE_IPV6
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struct in6_addr addr6;
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#endif
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infof(data, "schannel: Connecting to %s:%d (step 1/3)\n",
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conn->host.name, conn->remote_port);
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/* setup Schannel API options */
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memset(&schannel_cred, 0, sizeof(schannel_cred));
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schannel_cred.dwVersion = SCHANNEL_CRED_VERSION;
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schannel_cred.dwFlags = SCH_CRED_AUTO_CRED_VALIDATION |
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SCH_CRED_REVOCATION_CHECK_CHAIN;
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if(Curl_inet_pton(AF_INET, conn->host.name, &addr) ||
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#ifdef ENABLE_IPV6
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Curl_inet_pton(AF_INET6, conn->host.name, &addr6) ||
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#endif
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data->set.ssl.verifyhost < 2) {
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schannel_cred.dwFlags |= SCH_CRED_NO_SERVERNAME_CHECK;
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infof(data, "schannel: using IP address, disable SNI servername check\n");
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}
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switch(data->set.ssl.version) {
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case CURL_SSLVERSION_TLSv1:
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schannel_cred.grbitEnabledProtocols = SP_PROT_TLS1_0_CLIENT |
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SP_PROT_TLS1_1_CLIENT |
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SP_PROT_TLS1_2_CLIENT;
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break;
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case CURL_SSLVERSION_SSLv3:
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schannel_cred.grbitEnabledProtocols = SP_PROT_SSL3_CLIENT;
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break;
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case CURL_SSLVERSION_SSLv2:
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schannel_cred.grbitEnabledProtocols = SP_PROT_SSL2_CLIENT;
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break;
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}
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/* TODO: implement verification options */
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/* http://msdn.microsoft.com/en-us/library/windows/desktop/aa374716.aspx */
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sspi_status = s_pSecFn->AcquireCredentialsHandleA(NULL,
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UNISP_NAME_A, SECPKG_CRED_OUTBOUND, NULL, &schannel_cred,
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NULL, NULL, &connssl->cred_handle, &connssl->time_stamp);
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if(sspi_status != SEC_E_OK) {
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if(sspi_status == SEC_E_WRONG_PRINCIPAL)
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failf(data, "schannel: SNI or certificate check failed\n");
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else
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failf(data, "schannel: AcquireCredentialsHandleA failed: %d\n",
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sspi_status);
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return CURLE_SSL_CONNECT_ERROR;
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}
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connssl->schannel = TRUE;
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/* setup output buffer */
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outbuf.pvBuffer = NULL;
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outbuf.cbBuffer = 0;
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outbuf.BufferType = SECBUFFER_EMPTY;
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outbuf_desc.pBuffers = &outbuf;
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outbuf_desc.cBuffers = 1;
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outbuf_desc.ulVersion = SECBUFFER_VERSION;
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/* setup request flags */
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connssl->req_flags = ISC_REQ_SEQUENCE_DETECT | ISC_REQ_REPLAY_DETECT |
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ISC_REQ_CONFIDENTIALITY | ISC_REQ_INTEGRITY |
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ISC_REQ_EXTENDED_ERROR | ISC_REQ_ALLOCATE_MEMORY |
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ISC_REQ_STREAM;
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/* http://msdn.microsoft.com/en-us/library/windows/desktop/aa375924.aspx */
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sspi_status = s_pSecFn->InitializeSecurityContextA(&connssl->cred_handle,
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NULL, conn->host.name, connssl->req_flags, 0, 0, NULL, 0,
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&connssl->ctxt_handle, &outbuf_desc,
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&connssl->ret_flags, &connssl->time_stamp);
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if(sspi_status != SEC_I_CONTINUE_NEEDED) {
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if(sspi_status == SEC_E_WRONG_PRINCIPAL)
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failf(data, "schannel: SNI or certificate check failed\n");
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else
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failf(data, "schannel: initial InitializeSecurityContextA failed: %d\n",
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sspi_status);
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return CURLE_SSL_CONNECT_ERROR;
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}
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infof(data, "schannel: sending initial handshake data: %d ...\n",
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outbuf.cbBuffer);
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/* send initial handshake data which is now stored in output buffer */
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write = swrite(conn->sock[sockindex], outbuf.pvBuffer, outbuf.cbBuffer);
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s_pSecFn->FreeContextBuffer(outbuf.pvBuffer);
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if(write != outbuf.cbBuffer) {
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failf(data, "schannel: failed to send initial handshake data: %d\n", write);
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return CURLE_SSL_CONNECT_ERROR;
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}
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infof(data, "schannel: sent initial handshake data: %d\n", write);
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/* continue to second handshake step */
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connssl->connecting_state = ssl_connect_2;
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return CURLE_OK;
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}
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static CURLcode
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schannel_connect_step2(struct connectdata *conn, int sockindex) {
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int i;
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ssize_t read = -1, write = -1;
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struct SessionHandle *data = conn->data;
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struct ssl_connect_data* connssl = &conn->ssl[sockindex];
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SecBuffer outbuf[2];
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SecBufferDesc outbuf_desc;
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SecBuffer inbuf[2];
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SecBufferDesc inbuf_desc;
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SECURITY_STATUS sspi_status = SEC_E_OK;
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infof(data, "schannel: Connecting to %s:%d (step 2/3)\n",
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conn->host.name, conn->remote_port);
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connssl->connecting_state = ssl_connect_2;
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/* buffer to store previously received and encrypted data */
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if(connssl->encdata_buffer == NULL) {
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connssl->encdata_offset = 0;
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connssl->encdata_length = 4096;
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connssl->encdata_buffer = malloc(connssl->encdata_length);
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if(connssl->encdata_buffer == NULL) {
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failf(data, "schannel: unable to allocate memory");
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return CURLE_OUT_OF_MEMORY;
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}
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}
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/* read encrypted handshake data from socket */
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read = sread(conn->sock[sockindex],
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connssl->encdata_buffer + connssl->encdata_offset,
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connssl->encdata_length - connssl->encdata_offset);
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if(read < 0) {
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connssl->connecting_state = ssl_connect_2_reading;
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infof(data, "schannel: failed to receive handshake, waiting for more: %d\n",
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read);
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return CURLE_OK;
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}
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else if(read == 0) {
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failf(data, "schannel: failed to receive handshake, connection failed\n");
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return CURLE_SSL_CONNECT_ERROR;
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}
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else if(read > 0) {
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/* increase encrypted data buffer offset */
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connssl->encdata_offset += read;
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}
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infof(data, "schannel: encrypted data buffer %d/%d\n",
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connssl->encdata_offset, connssl->encdata_length);
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/* setup input buffers */
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inbuf[0].pvBuffer = malloc(connssl->encdata_offset);
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inbuf[0].cbBuffer = connssl->encdata_offset;
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inbuf[0].BufferType = SECBUFFER_TOKEN;
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inbuf[1].pvBuffer = NULL;
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inbuf[1].cbBuffer = 0;
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inbuf[1].BufferType = SECBUFFER_EMPTY;
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inbuf_desc.pBuffers = &inbuf[0];
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inbuf_desc.cBuffers = 2;
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inbuf_desc.ulVersion = SECBUFFER_VERSION;
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/* setup output buffers */
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outbuf[0].pvBuffer = NULL;
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outbuf[0].cbBuffer = 0;
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outbuf[0].BufferType = SECBUFFER_TOKEN;
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outbuf[1].pvBuffer = NULL;
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outbuf[1].cbBuffer = 0;
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outbuf[1].BufferType = SECBUFFER_ALERT;
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outbuf_desc.pBuffers = &outbuf[0];
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outbuf_desc.cBuffers = 2;
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outbuf_desc.ulVersion = SECBUFFER_VERSION;
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if(inbuf[0].pvBuffer == NULL) {
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failf(data, "schannel: unable to allocate memory");
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return CURLE_OUT_OF_MEMORY;
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}
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/* copy received handshake data into input buffer */
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memcpy(inbuf[0].pvBuffer, connssl->encdata_buffer, connssl->encdata_offset);
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/* http://msdn.microsoft.com/en-us/library/windows/desktop/aa375924.aspx */
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sspi_status = s_pSecFn->InitializeSecurityContextA(
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&connssl->cred_handle, &connssl->ctxt_handle, conn->host.name,
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connssl->req_flags, 0, 0, &inbuf_desc, 0, NULL, &outbuf_desc,
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&connssl->ret_flags, &connssl->time_stamp);
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/* free buffer for received handshake data */
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free(inbuf[0].pvBuffer);
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/* check if the handshake was incomplete */
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if(sspi_status == SEC_E_INCOMPLETE_MESSAGE) {
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connssl->connecting_state = ssl_connect_2_reading;
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infof(data, "schannel: received incomplete message, need more data: %d\n",
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sspi_status);
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return CURLE_OK;
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}
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/* check if the handshake needs to be continued */
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if(sspi_status == SEC_I_CONTINUE_NEEDED || sspi_status == SEC_E_OK) {
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for(i = 0; i < 2; i++) {
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/* search for handshake tokens that need to be send */
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if(outbuf[i].BufferType = SECBUFFER_TOKEN && outbuf[i].cbBuffer > 0) {
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infof(data, "schannel: sending next handshake data: %d ...\n",
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outbuf[i].cbBuffer);
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/* send handshake token to server */
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write = swrite(conn->sock[sockindex],
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outbuf[i].pvBuffer, outbuf[i].cbBuffer);
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if(write != outbuf[i].cbBuffer) {
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failf(data, "schannel: failed to send next handshake data: %d\n",
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write);
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return CURLE_SSL_CONNECT_ERROR;
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}
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}
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/* free obsolete buffer */
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if(outbuf[i].pvBuffer != NULL) {
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s_pSecFn->FreeContextBuffer(outbuf[i].pvBuffer);
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}
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}
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}
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else {
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if(sspi_status == SEC_E_WRONG_PRINCIPAL)
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failf(data, "schannel: SNI or certificate check failed\n");
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else
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failf(data, "schannel: next InitializeSecurityContextA failed: %d\n",
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sspi_status);
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return CURLE_SSL_CONNECT_ERROR;
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}
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/* check if there was additional remaining encrypted data */
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if(inbuf[1].BufferType = SECBUFFER_EXTRA) {
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infof(data, "schannel: encrypted data length: %d\n", inbuf[1].cbBuffer);
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/* check if the remaining data is less than the total amount
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* and therefore begins after the already processed data
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*/
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if(connssl->encdata_offset > inbuf[1].cbBuffer) {
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memmove(connssl->encdata_buffer,
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(connssl->encdata_buffer + connssl->encdata_offset) -
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inbuf[1].cbBuffer, inbuf[1].cbBuffer);
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connssl->encdata_offset = inbuf[1].cbBuffer;
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}
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}
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else {
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connssl->encdata_offset = 0;
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}
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/* check if the handshake needs to be continued */
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if(sspi_status == SEC_I_CONTINUE_NEEDED) {
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connssl->connecting_state = ssl_connect_2_reading;
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return CURLE_OK;
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}
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/* check if the handshake is complete */
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if(sspi_status == SEC_E_OK) {
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infof(data, "schannel: handshake complete\n");
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/* TODO: implement verification results */
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connssl->connecting_state = ssl_connect_3;
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infof(data, "SSL connected\n");
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}
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return CURLE_OK;
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}
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static CURLcode
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schannel_connect_step3(struct connectdata *conn, int sockindex) {
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struct ssl_connect_data *connssl = &conn->ssl[sockindex];
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DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
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connssl->connecting_state = ssl_connect_done;
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return CURLE_OK;
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}
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static CURLcode
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schannel_connect_common(struct connectdata *conn, int sockindex,
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bool nonblocking, bool *done) {
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CURLcode retcode;
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struct SessionHandle *data = conn->data;
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struct ssl_connect_data *connssl = &conn->ssl[sockindex];
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curl_socket_t sockfd = conn->sock[sockindex];
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long timeout_ms;
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int what;
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/* check if the connection has already been established */
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if(ssl_connection_complete == connssl->state) {
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*done = TRUE;
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return CURLE_OK;
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}
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if(ssl_connect_1 == connssl->connecting_state) {
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/* check out how much more time we're allowed */
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timeout_ms = Curl_timeleft(data, NULL, TRUE);
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if(timeout_ms < 0) {
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/* no need to continue if time already is up */
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failf(data, "SSL connection timeout");
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return CURLE_OPERATION_TIMEDOUT;
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}
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retcode = schannel_connect_step1(conn, sockindex);
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if(retcode)
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return retcode;
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}
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while(ssl_connect_2 == connssl->connecting_state ||
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ssl_connect_2_reading == connssl->connecting_state ||
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ssl_connect_2_writing == connssl->connecting_state) {
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/* check out how much more time we're allowed */
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timeout_ms = Curl_timeleft(data, NULL, TRUE);
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if(timeout_ms < 0) {
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/* no need to continue if time already is up */
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failf(data, "SSL connection timeout");
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return CURLE_OPERATION_TIMEDOUT;
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}
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/* if ssl is expecting something, check if it's available. */
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if(connssl->connecting_state == ssl_connect_2_reading
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|| connssl->connecting_state == ssl_connect_2_writing) {
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curl_socket_t writefd = ssl_connect_2_writing ==
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connssl->connecting_state ? sockfd : CURL_SOCKET_BAD;
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curl_socket_t readfd = ssl_connect_2_reading ==
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connssl->connecting_state ? sockfd : CURL_SOCKET_BAD;
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what = Curl_socket_ready(readfd, writefd, nonblocking ? 0 : timeout_ms);
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if(what < 0) {
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/* fatal error */
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failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
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return CURLE_SSL_CONNECT_ERROR;
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}
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else if(0 == what) {
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if(nonblocking) {
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*done = FALSE;
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return CURLE_OK;
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}
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else {
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/* timeout */
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failf(data, "SSL connection timeout");
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return CURLE_OPERATION_TIMEDOUT;
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}
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}
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/* 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 ret = -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;
|
||||
|
||||
/* check if the maximum stream sizes were queried */
|
||||
if(connssl->stream_sizes.cbMaximumMessage == 0) {
|
||||
sspi_status = s_pSecFn->QueryContextAttributesA(&connssl->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) */
|
||||
outbuf[0].pvBuffer = data;
|
||||
outbuf[0].cbBuffer = connssl->stream_sizes.cbHeader;
|
||||
outbuf[0].BufferType = SECBUFFER_STREAM_HEADER;
|
||||
|
||||
outbuf[1].pvBuffer = data + connssl->stream_sizes.cbHeader;
|
||||
outbuf[1].cbBuffer = len;
|
||||
outbuf[1].BufferType = SECBUFFER_DATA;
|
||||
|
||||
outbuf[2].pvBuffer = data + connssl->stream_sizes.cbHeader + len;
|
||||
outbuf[2].cbBuffer = connssl->stream_sizes.cbTrailer;
|
||||
outbuf[2].BufferType = SECBUFFER_STREAM_TRAILER;
|
||||
|
||||
outbuf[3].pvBuffer = NULL;
|
||||
outbuf[3].cbBuffer = 0;
|
||||
outbuf[3].BufferType = SECBUFFER_EMPTY;
|
||||
|
||||
outbuf_desc.pBuffers = &outbuf[0];
|
||||
outbuf_desc.cBuffers = 4;
|
||||
outbuf_desc.ulVersion = SECBUFFER_VERSION;
|
||||
|
||||
/* 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_handle, 0,
|
||||
&outbuf_desc, 0);
|
||||
|
||||
/* check if the message was encrypted */
|
||||
if(sspi_status == SEC_E_OK) {
|
||||
/* send the encrypted message including header, data and trailer */
|
||||
len = outbuf[0].cbBuffer + outbuf[1].cbBuffer + outbuf[2].cbBuffer;
|
||||
ret = swrite(conn->sock[sockindex], data, len);
|
||||
/* TODO: implement write buffering */
|
||||
}
|
||||
else if(sspi_status == SEC_E_INSUFFICIENT_MEMORY) {
|
||||
*err = CURLE_OUT_OF_MEMORY;
|
||||
}
|
||||
else{
|
||||
*err = CURLE_SEND_ERROR;
|
||||
}
|
||||
|
||||
free(data);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
schannel_recv(struct connectdata *conn, int sockindex,
|
||||
char *buf, size_t len, CURLcode *err) {
|
||||
int i = 0;
|
||||
size_t size = 0;
|
||||
ssize_t read = 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 %d\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 = 4096;
|
||||
connssl->decdata_buffer = malloc(connssl->decdata_length);
|
||||
if(connssl->decdata_buffer == NULL) {
|
||||
failf(data, "schannel: unable to allocate memory");
|
||||
return CURLE_OUT_OF_MEMORY;
|
||||
}
|
||||
}
|
||||
|
||||
/* increase buffers in order to fit the requested amount of data */
|
||||
while(connssl->encdata_length - connssl->encdata_offset < 2048 ||
|
||||
connssl->encdata_length < len) {
|
||||
/* increase internal encrypted data buffer */
|
||||
connssl->encdata_length += 2048;
|
||||
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;
|
||||
}
|
||||
|
||||
/* increase internal decrypted data buffer */
|
||||
connssl->decdata_length += 2048;
|
||||
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;
|
||||
}
|
||||
}
|
||||
|
||||
/* read encrypted data from socket */
|
||||
infof(data, "schannel: encrypted data buffer %d/%d\n",
|
||||
connssl->encdata_offset, connssl->encdata_length);
|
||||
size = connssl->encdata_length - connssl->encdata_offset;
|
||||
if(size > 0) {
|
||||
read = sread(conn->sock[sockindex],
|
||||
connssl->encdata_buffer + connssl->encdata_offset, size);
|
||||
infof(data, "schannel: encrypted data received %d\n", read);
|
||||
|
||||
/* check for received data */
|
||||
if(read > 0) {
|
||||
/* increase encrypted data buffer offset */
|
||||
connssl->encdata_offset += read;
|
||||
}
|
||||
}
|
||||
|
||||
infof(data, "schannel: encrypted data buffer %d/%d\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_INCOMPLETE_MESSAGE) {
|
||||
|
||||
/* prepare data buffer for DecryptMessage call */
|
||||
inbuf[0].pvBuffer = connssl->encdata_buffer;
|
||||
inbuf[0].cbBuffer = connssl->encdata_offset;
|
||||
inbuf[0].BufferType = SECBUFFER_DATA;
|
||||
|
||||
/* we need 3 more empty input buffers for possible output */
|
||||
inbuf[1].pvBuffer = NULL;
|
||||
inbuf[1].cbBuffer = 0;
|
||||
inbuf[1].BufferType = SECBUFFER_EMPTY;
|
||||
|
||||
inbuf[2].pvBuffer = NULL;
|
||||
inbuf[2].cbBuffer = 0;
|
||||
inbuf[2].BufferType = SECBUFFER_EMPTY;
|
||||
|
||||
inbuf[3].pvBuffer = NULL;
|
||||
inbuf[3].cbBuffer = 0;
|
||||
inbuf[3].BufferType = SECBUFFER_EMPTY;
|
||||
|
||||
inbuf_desc.pBuffers = &inbuf[0];
|
||||
inbuf_desc.cBuffers = 4;
|
||||
inbuf_desc.ulVersion = SECBUFFER_VERSION;
|
||||
|
||||
/* http://msdn.microsoft.com/en-us/library/windows/desktop/aa375348.aspx */
|
||||
sspi_status = s_pSecFn->DecryptMessage(&connssl->ctxt_handle,
|
||||
&inbuf_desc, 0, NULL);
|
||||
infof(data, "schannel: DecryptMessage %d\n", sspi_status);
|
||||
|
||||
/* check if everything went fine (server may want to renegotiate context) */
|
||||
if(sspi_status == SEC_E_OK || sspi_status == SEC_I_RENEGOTIATE) {
|
||||
/* check for successfully decrypted data */
|
||||
if(inbuf[1].BufferType == SECBUFFER_DATA) {
|
||||
infof(data, "schannel: decrypted data length: %d\n", inbuf[1].cbBuffer);
|
||||
|
||||
/* copy decrypted data to internal buffer */
|
||||
size = connssl->decdata_length - connssl->decdata_offset;
|
||||
size = size < inbuf[1].cbBuffer ? 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: %d\n", size);
|
||||
infof(data, "schannel: decrypted data cached: %d/%d\n",
|
||||
connssl->decdata_offset, connssl->decdata_length);
|
||||
}
|
||||
|
||||
/* check for remaining encrypted data */
|
||||
if(inbuf[3].BufferType = SECBUFFER_EXTRA) {
|
||||
infof(data, "schannel: encrypted data length: %d\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: %d/%d\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: client needs to renegotiate with server\n");
|
||||
|
||||
/* begin renegotiation */
|
||||
connssl->state = ssl_connection_negotiating;
|
||||
retcode = schannel_connect_common(conn, sockindex, FALSE, &done);
|
||||
if(retcode)
|
||||
*err = retcode;
|
||||
}
|
||||
}
|
||||
|
||||
/* 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;
|
||||
}
|
||||
|
||||
/* reduce internal buffer length to reduce memory usage */
|
||||
if(connssl->encdata_length > 4096) {
|
||||
connssl->encdata_length = connssl->encdata_offset > 0 ?
|
||||
connssl->encdata_offset + 2048 : 4096;
|
||||
connssl->encdata_buffer = realloc(connssl->encdata_buffer,
|
||||
connssl->encdata_length);
|
||||
}
|
||||
if(connssl->decdata_length > 4096) {
|
||||
connssl->decdata_length = connssl->decdata_offset > 0 ?
|
||||
connssl->decdata_offset + 2048 : 4096;
|
||||
connssl->decdata_buffer = realloc(connssl->decdata_buffer,
|
||||
connssl->decdata_length);
|
||||
}
|
||||
|
||||
/* check if something went wrong and we need to return an error */
|
||||
if(ret < 0) {
|
||||
if(sspi_status == SEC_E_INCOMPLETE_MESSAGE)
|
||||
*err = CURLE_AGAIN;
|
||||
else if(sspi_status != SEC_E_OK)
|
||||
*err = CURLE_RECV_ERROR;
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* everything went fine */
|
||||
infof(data, "schannel: read returns %d with error code %d\n", ret, *err);
|
||||
|
||||
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->schannel) /* SSL 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) {
|
||||
struct SessionHandle *data = conn->data;
|
||||
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
||||
|
||||
infof(data, "schannel: Closing connection with %s:%d\n",
|
||||
conn->host.name, conn->remote_port);
|
||||
|
||||
/* free SSPI Schannel API context and handle */
|
||||
if(connssl->schannel) {
|
||||
s_pSecFn->DeleteSecurityContext(&connssl->ctxt_handle);
|
||||
s_pSecFn->FreeCredentialsHandle(&connssl->cred_handle);
|
||||
}
|
||||
|
||||
/* free internal buffer for received encrypted data */
|
||||
if(connssl->encdata_buffer != NULL) {
|
||||
free(connssl->encdata_buffer);
|
||||
connssl->encdata_buffer = NULL;
|
||||
connssl->encdata_length = 0;
|
||||
connssl->encdata_offset = 0;
|
||||
}
|
||||
|
||||
/* free internal buffer for received decrypted data */
|
||||
if(connssl->decdata_buffer != NULL) {
|
||||
free(connssl->decdata_buffer);
|
||||
connssl->decdata_buffer = NULL;
|
||||
connssl->decdata_length = 0;
|
||||
connssl->decdata_offset = 0;
|
||||
}
|
||||
}
|
||||
|
||||
int Curl_schannel_shutdown(struct connectdata *conn, int sockindex) {
|
||||
return CURLE_NOT_BUILT_IN; /* TODO: implement SSL/TLS shutdown */
|
||||
}
|
||||
|
||||
int Curl_schannel_init() {
|
||||
return (Curl_sspi_global_init() == CURLE_OK ? 1 : 0);
|
||||
}
|
||||
|
||||
void Curl_schannel_cleanup() {
|
||||
Curl_sspi_global_cleanup();
|
||||
}
|
||||
|
||||
size_t Curl_schannel_version(char *buffer, size_t size)
|
||||
{
|
||||
unsigned long version = s_pSecFn ? s_pSecFn->dwVersion : 0;
|
||||
return snprintf(buffer, size, "Schannel/%d.%d.%d.%d",
|
||||
(version>>0)&0xff, (version>>8)&0xff,
|
||||
(version>>16)&0xff, (version>>24)&0xff);
|
||||
}
|
||||
|
||||
#endif /* USE_SCHANNEL */
|
||||
#endif /* USE_WINDOWS_SSPI */
|
||||
65
lib/curl_schannel.h
Normal file
65
lib/curl_schannel.h
Normal file
@ -0,0 +1,65 @@
|
||||
#ifndef HEADER_SCHANNEL_H
|
||||
#define HEADER_SCHANNEL_H
|
||||
/***************************************************************************
|
||||
* _ _ ____ _
|
||||
* Project ___| | | | _ \| |
|
||||
* / __| | | | |_) | |
|
||||
* | (__| |_| | _ <| |___
|
||||
* \___|\___/|_| \_\_____|
|
||||
*
|
||||
* Copyright (C) 2012, Marc Hoersken, <info@marc-hoersken.de>, 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.
|
||||
*
|
||||
***************************************************************************/
|
||||
#include "setup.h"
|
||||
|
||||
#ifdef USE_WINDOWS_SSPI
|
||||
#ifdef USE_SCHANNEL
|
||||
|
||||
#ifndef UNISP_NAME_A
|
||||
#define UNISP_NAME_A "Microsoft Unified Security Protocol Provider"
|
||||
#endif
|
||||
|
||||
CURLcode Curl_schannel_connect(struct connectdata *conn, int sockindex);
|
||||
|
||||
CURLcode Curl_schannel_connect_nonblocking(struct connectdata *conn,
|
||||
int sockindex,
|
||||
bool *done);
|
||||
|
||||
bool Curl_schannel_data_pending(const struct connectdata *conn, int sockindex);
|
||||
void Curl_schannel_close(struct connectdata *conn, int sockindex);
|
||||
int Curl_schannel_shutdown(struct connectdata *conn, int sockindex);
|
||||
|
||||
int Curl_schannel_init();
|
||||
void Curl_schannel_cleanup();
|
||||
size_t Curl_schannel_version(char *buffer, size_t size);
|
||||
|
||||
/* API setup for Schannel */
|
||||
#define curlssl_init Curl_schannel_init
|
||||
#define curlssl_cleanup Curl_schannel_cleanup
|
||||
#define curlssl_connect Curl_schannel_connect
|
||||
#define curlssl_connect_nonblocking Curl_schannel_connect_nonblocking
|
||||
#define curlssl_session_free(x) (x=x, CURLE_NOT_BUILT_IN)
|
||||
#define curlssl_close_all(x) (x=x, CURLE_NOT_BUILT_IN)
|
||||
#define curlssl_close Curl_schannel_close
|
||||
#define curlssl_shutdown Curl_schannel_shutdown
|
||||
#define curlssl_set_engine(x,y) (x=x, y=y, CURLE_NOT_BUILT_IN)
|
||||
#define curlssl_set_engine_default(x) (x=x, CURLE_NOT_BUILT_IN)
|
||||
#define curlssl_engines_list(x) (x=x, (struct curl_slist *)NULL)
|
||||
#define curlssl_version Curl_schannel_version
|
||||
#define curlssl_check_cxn(x) (x=x, -1)
|
||||
#define curlssl_data_pending Curl_schannel_data_pending
|
||||
|
||||
#endif /* USE_SCHANNEL */
|
||||
#endif /* USE_WINDOWS_SSPI */
|
||||
#endif /* HEADER_SCHANNEL_H */
|
||||
@ -33,6 +33,7 @@
|
||||
Curl_nss_ - prefix for NSS ones
|
||||
Curl_polarssl_ - prefix for PolarSSL ones
|
||||
Curl_cyassl_ - prefix for CyaSSL ones
|
||||
Curl_schannel_ - prefix for Schannel SSPI ones
|
||||
|
||||
Note that this source code uses curlssl_* functions, and they are all
|
||||
defines/macros #defined by the lib-specific header files.
|
||||
@ -57,6 +58,7 @@
|
||||
#include "polarssl.h" /* PolarSSL versions */
|
||||
#include "axtls.h" /* axTLS versions */
|
||||
#include "cyassl.h" /* CyaSSL versions */
|
||||
#include "curl_schannel.h" /* Schannel SSPI version */
|
||||
#include "sendf.h"
|
||||
#include "rawstr.h"
|
||||
#include "url.h"
|
||||
|
||||
@ -131,6 +131,11 @@
|
||||
#undef realloc
|
||||
#endif /* USE_AXTLS */
|
||||
|
||||
#ifdef USE_SCHANNEL
|
||||
#include <schnlsp.h>
|
||||
#include "curl_sspi.h"
|
||||
#endif
|
||||
|
||||
#ifdef HAVE_NETINET_IN_H
|
||||
#include <netinet/in.h>
|
||||
#endif
|
||||
@ -282,6 +287,18 @@ struct ssl_connect_data {
|
||||
SSL_CTX* ssl_ctx;
|
||||
SSL* ssl;
|
||||
#endif /* USE_AXTLS */
|
||||
#ifdef USE_SCHANNEL
|
||||
bool schannel;
|
||||
TimeStamp time_stamp;
|
||||
CredHandle cred_handle;
|
||||
CtxtHandle ctxt_handle;
|
||||
SecPkgContext_StreamSizes stream_sizes;
|
||||
ssl_connect_state connecting_state;
|
||||
size_t encdata_length, decdata_length;
|
||||
size_t encdata_offset, decdata_offset;
|
||||
unsigned char *encdata_buffer, *decdata_buffer;
|
||||
unsigned long req_flags, ret_flags;
|
||||
#endif /* USE_SCHANNEL */
|
||||
};
|
||||
|
||||
struct ssl_config_data {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user