diff options
Diffstat (limited to 'libcurl/src/lib/socks_sspi.c')
| -rw-r--r-- | libcurl/src/lib/socks_sspi.c | 601 |
1 files changed, 601 insertions, 0 deletions
diff --git a/libcurl/src/lib/socks_sspi.c b/libcurl/src/lib/socks_sspi.c new file mode 100644 index 0000000..2ada80a --- /dev/null +++ b/libcurl/src/lib/socks_sspi.c @@ -0,0 +1,601 @@ +/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2012 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 2009, 2011, Markus Moeller, <markus_moeller@compuserve.com>
+ *
+ * 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 "curl_setup.h"
+
+#if defined(USE_WINDOWS_SSPI) && !defined(CURL_DISABLE_PROXY)
+
+#include "urldata.h"
+#include "sendf.h"
+#include "connect.h"
+#include "strerror.h"
+#include "timeval.h"
+#include "socks.h"
+#include "curl_sspi.h"
+#include "curl_multibyte.h"
+#include "warnless.h"
+#include "curl_printf.h"
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+/*
+ * Helper sspi error functions.
+ */
+static int check_sspi_err(struct connectdata *conn,
+ SECURITY_STATUS status,
+ const char* function)
+{
+ if(status != SEC_E_OK &&
+ status != SEC_I_COMPLETE_AND_CONTINUE &&
+ status != SEC_I_COMPLETE_NEEDED &&
+ status != SEC_I_CONTINUE_NEEDED) {
+ failf(conn->data, "SSPI error: %s failed: %s", function,
+ Curl_sspi_strerror(conn, status));
+ return 1;
+ }
+ return 0;
+}
+
+/* This is the SSPI-using version of this function */
+CURL_STATIC CURLcode Curl_SOCKS5_gssapi_negotiate(int sockindex,
+ struct connectdata *conn)
+{
+ struct SessionHandle *data = conn->data;
+ curl_socket_t sock = conn->sock[sockindex];
+ CURLcode code;
+ ssize_t actualread;
+ ssize_t written;
+ int result;
+ /* Needs GSS-API authentication */
+ SECURITY_STATUS status;
+ unsigned long sspi_ret_flags = 0;
+ int gss_enc;
+ SecBuffer sspi_send_token, sspi_recv_token, sspi_w_token[3];
+ SecBufferDesc input_desc, output_desc, wrap_desc;
+ SecPkgContext_Sizes sspi_sizes;
+ CredHandle cred_handle;
+ CtxtHandle sspi_context;
+ PCtxtHandle context_handle = NULL;
+ SecPkgCredentials_Names names;
+ TimeStamp expiry;
+ char *service_name = NULL;
+ unsigned short us_length;
+ unsigned long qop;
+ unsigned char socksreq[4]; /* room for GSS-API exchange header only */
+ char *service = data->set.str[STRING_SOCKS5_GSSAPI_SERVICE];
+
+ /* GSS-API request looks like
+ * +----+------+-----+----------------+
+ * |VER | MTYP | LEN | TOKEN |
+ * +----+------+----------------------+
+ * | 1 | 1 | 2 | up to 2^16 - 1 |
+ * +----+------+-----+----------------+
+ */
+
+ /* prepare service name */
+ if(strchr(service, '/')) {
+ service_name = malloc(strlen(service));
+ if(!service_name)
+ return CURLE_OUT_OF_MEMORY;
+ memcpy(service_name, service, strlen(service));
+ }
+ else {
+ service_name = malloc(strlen(service) + strlen(conn->proxy.name) + 2);
+ if(!service_name)
+ return CURLE_OUT_OF_MEMORY;
+ snprintf(service_name, strlen(service) +strlen(conn->proxy.name)+2,
+ "%s/%s", service, conn->proxy.name);
+ }
+
+ input_desc.cBuffers = 1;
+ input_desc.pBuffers = &sspi_recv_token;
+ input_desc.ulVersion = SECBUFFER_VERSION;
+
+ sspi_recv_token.BufferType = SECBUFFER_TOKEN;
+ sspi_recv_token.cbBuffer = 0;
+ sspi_recv_token.pvBuffer = NULL;
+
+ output_desc.cBuffers = 1;
+ output_desc.pBuffers = &sspi_send_token;
+ output_desc.ulVersion = SECBUFFER_VERSION;
+
+ sspi_send_token.BufferType = SECBUFFER_TOKEN;
+ sspi_send_token.cbBuffer = 0;
+ sspi_send_token.pvBuffer = NULL;
+
+ wrap_desc.cBuffers = 3;
+ wrap_desc.pBuffers = sspi_w_token;
+ wrap_desc.ulVersion = SECBUFFER_VERSION;
+
+ cred_handle.dwLower = 0;
+ cred_handle.dwUpper = 0;
+
+ status = s_pSecFn->AcquireCredentialsHandle(NULL,
+ (TCHAR *) TEXT("Kerberos"),
+ SECPKG_CRED_OUTBOUND,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ &cred_handle,
+ &expiry);
+
+ if(check_sspi_err(conn, status, "AcquireCredentialsHandle")) {
+ failf(data, "Failed to acquire credentials.");
+ free(service_name);
+ s_pSecFn->FreeCredentialsHandle(&cred_handle);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ /* As long as we need to keep sending some context info, and there's no */
+ /* errors, keep sending it... */
+ for(;;) {
+ TCHAR *sname;
+
+ sname = Curl_convert_UTF8_to_tchar(service_name);
+ if(!sname)
+ return CURLE_OUT_OF_MEMORY;
+
+ status = s_pSecFn->InitializeSecurityContext(&cred_handle,
+ context_handle,
+ sname,
+ ISC_REQ_MUTUAL_AUTH |
+ ISC_REQ_ALLOCATE_MEMORY |
+ ISC_REQ_CONFIDENTIALITY |
+ ISC_REQ_REPLAY_DETECT,
+ 0,
+ SECURITY_NATIVE_DREP,
+ &input_desc,
+ 0,
+ &sspi_context,
+ &output_desc,
+ &sspi_ret_flags,
+ &expiry);
+
+ Curl_unicodefree(sname);
+
+ if(sspi_recv_token.pvBuffer) {
+ s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
+ sspi_recv_token.pvBuffer = NULL;
+ sspi_recv_token.cbBuffer = 0;
+ }
+
+ if(check_sspi_err(conn, status, "InitializeSecurityContext")) {
+ free(service_name);
+ s_pSecFn->FreeCredentialsHandle(&cred_handle);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ if(sspi_recv_token.pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
+ failf(data, "Failed to initialise security context.");
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ if(sspi_send_token.cbBuffer != 0) {
+ socksreq[0] = 1; /* GSS-API subnegotiation version */
+ socksreq[1] = 1; /* authentication message type */
+ us_length = htons((short)sspi_send_token.cbBuffer);
+ memcpy(socksreq+2, &us_length, sizeof(short));
+
+ code = Curl_write_plain(conn, sock, (char *)socksreq, 4, &written);
+ if(code || (4 != written)) {
+ failf(data, "Failed to send SSPI authentication request.");
+ free(service_name);
+ if(sspi_send_token.pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
+ if(sspi_recv_token.pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
+ s_pSecFn->FreeCredentialsHandle(&cred_handle);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ code = Curl_write_plain(conn, sock, (char *)sspi_send_token.pvBuffer,
+ sspi_send_token.cbBuffer, &written);
+ if(code || (sspi_send_token.cbBuffer != (size_t)written)) {
+ failf(data, "Failed to send SSPI authentication token.");
+ free(service_name);
+ if(sspi_send_token.pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
+ if(sspi_recv_token.pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
+ s_pSecFn->FreeCredentialsHandle(&cred_handle);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ }
+
+ if(sspi_send_token.pvBuffer) {
+ s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
+ sspi_send_token.pvBuffer = NULL;
+ }
+ sspi_send_token.cbBuffer = 0;
+
+ if(sspi_recv_token.pvBuffer) {
+ s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
+ sspi_recv_token.pvBuffer = NULL;
+ }
+ sspi_recv_token.cbBuffer = 0;
+
+ if(status != SEC_I_CONTINUE_NEEDED)
+ break;
+
+ /* analyse response */
+
+ /* GSS-API response looks like
+ * +----+------+-----+----------------+
+ * |VER | MTYP | LEN | TOKEN |
+ * +----+------+----------------------+
+ * | 1 | 1 | 2 | up to 2^16 - 1 |
+ * +----+------+-----+----------------+
+ */
+
+ result = Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread);
+ if(result || (actualread != 4)) {
+ failf(data, "Failed to receive SSPI authentication response.");
+ free(service_name);
+ s_pSecFn->FreeCredentialsHandle(&cred_handle);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ /* ignore the first (VER) byte */
+ if(socksreq[1] == 255) { /* status / message type */
+ failf(data, "User was rejected by the SOCKS5 server (%u %u).",
+ (unsigned int)socksreq[0], (unsigned int)socksreq[1]);
+ free(service_name);
+ s_pSecFn->FreeCredentialsHandle(&cred_handle);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ if(socksreq[1] != 1) { /* status / messgae type */
+ failf(data, "Invalid SSPI authentication response type (%u %u).",
+ (unsigned int)socksreq[0], (unsigned int)socksreq[1]);
+ free(service_name);
+ s_pSecFn->FreeCredentialsHandle(&cred_handle);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ memcpy(&us_length, socksreq+2, sizeof(short));
+ us_length = ntohs(us_length);
+
+ sspi_recv_token.cbBuffer = us_length;
+ sspi_recv_token.pvBuffer = malloc(us_length);
+
+ if(!sspi_recv_token.pvBuffer) {
+ free(service_name);
+ s_pSecFn->FreeCredentialsHandle(&cred_handle);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_OUT_OF_MEMORY;
+ }
+ result = Curl_blockread_all(conn, sock, (char *)sspi_recv_token.pvBuffer,
+ sspi_recv_token.cbBuffer, &actualread);
+
+ if(result || (actualread != us_length)) {
+ failf(data, "Failed to receive SSPI authentication token.");
+ free(service_name);
+ if(sspi_recv_token.pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
+ s_pSecFn->FreeCredentialsHandle(&cred_handle);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ context_handle = &sspi_context;
+ }
+
+ free(service_name);
+
+ /* Everything is good so far, user was authenticated! */
+ status = s_pSecFn->QueryCredentialsAttributes(&cred_handle,
+ SECPKG_CRED_ATTR_NAMES,
+ &names);
+ s_pSecFn->FreeCredentialsHandle(&cred_handle);
+ if(check_sspi_err(conn, status, "QueryCredentialAttributes")) {
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ s_pSecFn->FreeContextBuffer(names.sUserName);
+ failf(data, "Failed to determine user name.");
+ return CURLE_COULDNT_CONNECT;
+ }
+ infof(data, "SOCKS5 server authencticated user %s with GSS-API.\n",
+ names.sUserName);
+ s_pSecFn->FreeContextBuffer(names.sUserName);
+
+ /* Do encryption */
+ socksreq[0] = 1; /* GSS-API subnegotiation version */
+ socksreq[1] = 2; /* encryption message type */
+
+ gss_enc = 0; /* no data protection */
+ /* do confidentiality protection if supported */
+ if(sspi_ret_flags & ISC_REQ_CONFIDENTIALITY)
+ gss_enc = 2;
+ /* else do integrity protection */
+ else if(sspi_ret_flags & ISC_REQ_INTEGRITY)
+ gss_enc = 1;
+
+ infof(data, "SOCKS5 server supports GSS-API %s data protection.\n",
+ (gss_enc==0)?"no":((gss_enc==1)?"integrity":"confidentiality") );
+ /* force to no data protection, avoid encryption/decryption for now */
+ gss_enc = 0;
+ /*
+ * Sending the encryption type in clear seems wrong. It should be
+ * protected with gss_seal()/gss_wrap(). See RFC1961 extract below
+ * The NEC reference implementations on which this is based is
+ * therefore at fault
+ *
+ * +------+------+------+.......................+
+ * + ver | mtyp | len | token |
+ * +------+------+------+.......................+
+ * + 0x01 | 0x02 | 0x02 | up to 2^16 - 1 octets |
+ * +------+------+------+.......................+
+ *
+ * Where:
+ *
+ * - "ver" is the protocol version number, here 1 to represent the
+ * first version of the SOCKS/GSS-API protocol
+ *
+ * - "mtyp" is the message type, here 2 to represent a protection
+ * -level negotiation message
+ *
+ * - "len" is the length of the "token" field in octets
+ *
+ * - "token" is the GSS-API encapsulated protection level
+ *
+ * The token is produced by encapsulating an octet containing the
+ * required protection level using gss_seal()/gss_wrap() with conf_req
+ * set to FALSE. The token is verified using gss_unseal()/
+ * gss_unwrap().
+ *
+ */
+
+ if(data->set.socks5_gssapi_nec) {
+ us_length = htons((short)1);
+ memcpy(socksreq+2, &us_length, sizeof(short));
+ }
+ else {
+ status = s_pSecFn->QueryContextAttributes(&sspi_context,
+ SECPKG_ATTR_SIZES,
+ &sspi_sizes);
+ if(check_sspi_err(conn, status, "QueryContextAttributes")) {
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ failf(data, "Failed to query security context attributes.");
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ sspi_w_token[0].cbBuffer = sspi_sizes.cbSecurityTrailer;
+ sspi_w_token[0].BufferType = SECBUFFER_TOKEN;
+ sspi_w_token[0].pvBuffer = malloc(sspi_sizes.cbSecurityTrailer);
+
+ if(!sspi_w_token[0].pvBuffer) {
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ sspi_w_token[1].cbBuffer = 1;
+ sspi_w_token[1].pvBuffer = malloc(1);
+ if(!sspi_w_token[1].pvBuffer) {
+ s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ memcpy(sspi_w_token[1].pvBuffer, &gss_enc, 1);
+ sspi_w_token[2].BufferType = SECBUFFER_PADDING;
+ sspi_w_token[2].cbBuffer = sspi_sizes.cbBlockSize;
+ sspi_w_token[2].pvBuffer = malloc(sspi_sizes.cbBlockSize);
+ if(!sspi_w_token[2].pvBuffer) {
+ s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
+ s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_OUT_OF_MEMORY;
+ }
+ status = s_pSecFn->EncryptMessage(&sspi_context,
+ KERB_WRAP_NO_ENCRYPT,
+ &wrap_desc,
+ 0);
+ if(check_sspi_err(conn, status, "EncryptMessage")) {
+ s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
+ s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
+ s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ failf(data, "Failed to query security context attributes.");
+ return CURLE_COULDNT_CONNECT;
+ }
+ sspi_send_token.cbBuffer = sspi_w_token[0].cbBuffer
+ + sspi_w_token[1].cbBuffer
+ + sspi_w_token[2].cbBuffer;
+ sspi_send_token.pvBuffer = malloc(sspi_send_token.cbBuffer);
+ if(!sspi_send_token.pvBuffer) {
+ s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
+ s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
+ s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ memcpy(sspi_send_token.pvBuffer, sspi_w_token[0].pvBuffer,
+ sspi_w_token[0].cbBuffer);
+ memcpy((PUCHAR) sspi_send_token.pvBuffer +(int)sspi_w_token[0].cbBuffer,
+ sspi_w_token[1].pvBuffer, sspi_w_token[1].cbBuffer);
+ memcpy((PUCHAR) sspi_send_token.pvBuffer
+ +sspi_w_token[0].cbBuffer
+ +sspi_w_token[1].cbBuffer,
+ sspi_w_token[2].pvBuffer, sspi_w_token[2].cbBuffer);
+
+ s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
+ sspi_w_token[0].pvBuffer = NULL;
+ sspi_w_token[0].cbBuffer = 0;
+ s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
+ sspi_w_token[1].pvBuffer = NULL;
+ sspi_w_token[1].cbBuffer = 0;
+ s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer);
+ sspi_w_token[2].pvBuffer = NULL;
+ sspi_w_token[2].cbBuffer = 0;
+
+ us_length = htons((short)sspi_send_token.cbBuffer);
+ memcpy(socksreq+2, &us_length, sizeof(short));
+ }
+
+ code = Curl_write_plain(conn, sock, (char *)socksreq, 4, &written);
+ if(code || (4 != written)) {
+ failf(data, "Failed to send SSPI encryption request.");
+ if(sspi_send_token.pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ if(data->set.socks5_gssapi_nec) {
+ memcpy(socksreq, &gss_enc, 1);
+ code = Curl_write_plain(conn, sock, (char *)socksreq, 1, &written);
+ if(code || (1 != written)) {
+ failf(data, "Failed to send SSPI encryption type.");
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+ }
+ else {
+ code = Curl_write_plain(conn, sock, (char *)sspi_send_token.pvBuffer,
+ sspi_send_token.cbBuffer, &written);
+ if(code || (sspi_send_token.cbBuffer != (size_t)written)) {
+ failf(data, "Failed to send SSPI encryption type.");
+ if(sspi_send_token.pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+ if(sspi_send_token.pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
+ }
+
+ result = Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread);
+ if(result || (actualread != 4)) {
+ failf(data, "Failed to receive SSPI encryption response.");
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ /* ignore the first (VER) byte */
+ if(socksreq[1] == 255) { /* status / message type */
+ failf(data, "User was rejected by the SOCKS5 server (%u %u).",
+ (unsigned int)socksreq[0], (unsigned int)socksreq[1]);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ if(socksreq[1] != 2) { /* status / message type */
+ failf(data, "Invalid SSPI encryption response type (%u %u).",
+ (unsigned int)socksreq[0], (unsigned int)socksreq[1]);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ memcpy(&us_length, socksreq+2, sizeof(short));
+ us_length = ntohs(us_length);
+
+ sspi_w_token[0].cbBuffer = us_length;
+ sspi_w_token[0].pvBuffer = malloc(us_length);
+ if(!sspi_w_token[0].pvBuffer) {
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ result = Curl_blockread_all(conn, sock, (char *)sspi_w_token[0].pvBuffer,
+ sspi_w_token[0].cbBuffer, &actualread);
+
+ if(result || (actualread != us_length)) {
+ failf(data, "Failed to receive SSPI encryption type.");
+ s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+
+ if(!data->set.socks5_gssapi_nec) {
+ wrap_desc.cBuffers = 2;
+ sspi_w_token[0].BufferType = SECBUFFER_STREAM;
+ sspi_w_token[1].BufferType = SECBUFFER_DATA;
+ sspi_w_token[1].cbBuffer = 0;
+ sspi_w_token[1].pvBuffer = NULL;
+
+ status = s_pSecFn->DecryptMessage(&sspi_context,
+ &wrap_desc,
+ 0,
+ &qop);
+
+ if(check_sspi_err(conn, status, "DecryptMessage")) {
+ if(sspi_w_token[0].pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
+ if(sspi_w_token[1].pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ failf(data, "Failed to query security context attributes.");
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ if(sspi_w_token[1].cbBuffer != 1) {
+ failf(data, "Invalid SSPI encryption response length (%lu).",
+ (unsigned long)sspi_w_token[1].cbBuffer);
+ if(sspi_w_token[0].pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
+ if(sspi_w_token[1].pvBuffer)
+ s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+
+ memcpy(socksreq, sspi_w_token[1].pvBuffer, sspi_w_token[1].cbBuffer);
+ s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
+ s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
+ }
+ else {
+ if(sspi_w_token[0].cbBuffer != 1) {
+ failf(data, "Invalid SSPI encryption response length (%lu).",
+ (unsigned long)sspi_w_token[0].cbBuffer);
+ s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ return CURLE_COULDNT_CONNECT;
+ }
+ memcpy(socksreq, sspi_w_token[0].pvBuffer, sspi_w_token[0].cbBuffer);
+ s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
+ }
+
+ infof(data, "SOCKS5 access with%s protection granted.\n",
+ (socksreq[0]==0)?"out GSS-API data":
+ ((socksreq[0]==1)?" GSS-API integrity":" GSS-API confidentiality"));
+
+ /* For later use if encryption is required
+ conn->socks5_gssapi_enctype = socksreq[0];
+ if(socksreq[0] != 0)
+ conn->socks5_sspi_context = sspi_context;
+ else {
+ s_pSecFn->DeleteSecurityContext(&sspi_context);
+ conn->socks5_sspi_context = sspi_context;
+ }
+ */
+ return CURLE_OK;
+}
+#endif
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