46480bb9a1
SSPI related code now compiles with ANSI and WCHAR versions of security methods (WinCE requires WCHAR versions of methods). Pulled UTF8 to WCHAR conversion methods out of idn_win32.c into their own file. curl_sasl.c - include curl_memory.h to use correct memory functions. getenv.c and telnet.c - WinCE compatibility fix With some committer adjustments
314 lines
8.7 KiB
C
314 lines
8.7 KiB
C
/***************************************************************************
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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) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at 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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#include "setup.h"
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#ifdef USE_WINDOWS_SSPI
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#ifndef CURL_DISABLE_HTTP
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#include "urldata.h"
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#include "sendf.h"
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#include "rawstr.h"
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#include "warnless.h"
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#include "curl_base64.h"
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#include "http_negotiate.h"
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#include "curl_memory.h"
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#include "curl_multibyte.h"
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#define _MPRINTF_REPLACE /* use our functions only */
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#include <curl/mprintf.h>
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/* The last #include file should be: */
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#include "memdebug.h"
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static int
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get_gss_name(struct connectdata *conn, bool proxy,
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struct negotiatedata *neg_ctx)
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{
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const char* service;
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size_t length;
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if(proxy && !conn->proxy.name)
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/* proxy auth requested but no given proxy name, error out! */
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return -1;
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/* GSSAPI implementation by Globus (known as GSI) requires the name to be
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of form "<service>/<fqdn>" instead of <service>@<fqdn> (ie. slash instead
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of at-sign). Also GSI servers are often identified as 'host' not 'khttp'.
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Change following lines if you want to use GSI */
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/* IIS uses the <service>@<fqdn> form but uses 'http' as the service name,
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and SSPI then generates an NTLM token. When using <service>/<fqdn> a
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Kerberos token is generated. */
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if(neg_ctx->gss)
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service = "KHTTP";
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else
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service = "HTTP";
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length = strlen(service) + 1 + strlen(proxy ? conn->proxy.name :
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conn->host.name) + 1;
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if(length + 1 > sizeof(neg_ctx->server_name))
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return EMSGSIZE;
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snprintf(neg_ctx->server_name, sizeof(neg_ctx->server_name), "%s/%s",
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service, proxy ? conn->proxy.name : conn->host.name);
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return 0;
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}
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/* returning zero (0) means success, everything else is treated as "failure"
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with no care exactly what the failure was */
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int Curl_input_negotiate(struct connectdata *conn, bool proxy,
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const char *header)
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{
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struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
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&conn->data->state.negotiate;
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BYTE *input_token = 0;
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SecBufferDesc out_buff_desc;
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SecBuffer out_sec_buff;
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SecBufferDesc in_buff_desc;
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SecBuffer in_sec_buff;
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ULONG context_attributes;
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TimeStamp lifetime;
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LPTSTR sname;
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int ret;
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size_t len = 0, input_token_len = 0;
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bool gss = FALSE;
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const char* protocol;
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CURLcode error;
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while(*header && ISSPACE(*header))
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header++;
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if(checkprefix("GSS-Negotiate", header)) {
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protocol = "GSS-Negotiate";
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gss = TRUE;
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}
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else if(checkprefix("Negotiate", header)) {
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protocol = "Negotiate";
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gss = FALSE;
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}
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else
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return -1;
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if(neg_ctx->context) {
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if(neg_ctx->gss != gss) {
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return -1;
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}
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}
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else {
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neg_ctx->protocol = protocol;
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neg_ctx->gss = gss;
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}
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if(neg_ctx->context && neg_ctx->status == SEC_E_OK) {
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/* We finished successfully our part of authentication, but server
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* rejected it (since we're again here). Exit with an error since we
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* can't invent anything better */
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Curl_cleanup_negotiate(conn->data);
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return -1;
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}
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if(0 == strlen(neg_ctx->server_name)) {
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ret = get_gss_name(conn, proxy, neg_ctx);
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if(ret)
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return ret;
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}
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if(!neg_ctx->output_token) {
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PSecPkgInfo SecurityPackage;
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ret = s_pSecFn->QuerySecurityPackageInfo(TEXT("Negotiate"),
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&SecurityPackage);
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if(ret != SEC_E_OK)
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return -1;
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/* Allocate input and output buffers according to the max token size
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as indicated by the security package */
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neg_ctx->max_token_length = SecurityPackage->cbMaxToken;
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neg_ctx->output_token = malloc(neg_ctx->max_token_length);
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s_pSecFn->FreeContextBuffer(SecurityPackage);
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}
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/* Obtain the input token, if any */
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header += strlen(neg_ctx->protocol);
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while(*header && ISSPACE(*header))
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header++;
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len = strlen(header);
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if(!len) {
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/* first call in a new negotation, we have to acquire credentials,
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and allocate memory for the context */
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neg_ctx->credentials = malloc(sizeof(CredHandle));
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neg_ctx->context = malloc(sizeof(CtxtHandle));
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if(!neg_ctx->credentials || !neg_ctx->context)
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return -1;
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neg_ctx->status =
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s_pSecFn->AcquireCredentialsHandle(NULL, TEXT("Negotiate"),
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SECPKG_CRED_OUTBOUND, NULL, NULL,
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NULL, NULL, neg_ctx->credentials,
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&lifetime);
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if(neg_ctx->status != SEC_E_OK)
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return -1;
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}
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else {
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input_token = malloc(neg_ctx->max_token_length);
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if(!input_token)
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return -1;
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error = Curl_base64_decode(header,
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(unsigned char **)&input_token,
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&input_token_len);
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if(error || input_token_len == 0)
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return -1;
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}
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/* prepare the output buffers, and input buffers if present */
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out_buff_desc.ulVersion = 0;
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out_buff_desc.cBuffers = 1;
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out_buff_desc.pBuffers = &out_sec_buff;
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out_sec_buff.cbBuffer = curlx_uztoul(neg_ctx->max_token_length);
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out_sec_buff.BufferType = SECBUFFER_TOKEN;
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out_sec_buff.pvBuffer = neg_ctx->output_token;
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if(input_token) {
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in_buff_desc.ulVersion = 0;
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in_buff_desc.cBuffers = 1;
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in_buff_desc.pBuffers = &in_sec_buff;
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in_sec_buff.cbBuffer = curlx_uztoul(input_token_len);
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in_sec_buff.BufferType = SECBUFFER_TOKEN;
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in_sec_buff.pvBuffer = input_token;
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}
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#ifdef UNICODE
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sname = Curl_convert_UTF8_to_wchar(neg_ctx->server_name);
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if(!wserver)
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return CURLE_OUT_OF_MEMORY;
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#else
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sname = neg_ctx->server_name;
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#endif
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neg_ctx->status = s_pSecFn->InitializeSecurityContext(
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neg_ctx->credentials,
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input_token ? neg_ctx->context : 0,
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sname,
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ISC_REQ_CONFIDENTIALITY,
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0,
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SECURITY_NATIVE_DREP,
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input_token ? &in_buff_desc : 0,
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0,
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neg_ctx->context,
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&out_buff_desc,
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&context_attributes,
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&lifetime);
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#ifdef UNICODE
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free(sname);
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#endif
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if(GSS_ERROR(neg_ctx->status))
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return -1;
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if(neg_ctx->status == SEC_I_COMPLETE_NEEDED ||
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neg_ctx->status == SEC_I_COMPLETE_AND_CONTINUE) {
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neg_ctx->status = s_pSecFn->CompleteAuthToken(neg_ctx->context,
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&out_buff_desc);
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if(GSS_ERROR(neg_ctx->status))
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return -1;
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}
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neg_ctx->output_token_length = out_sec_buff.cbBuffer;
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return 0;
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}
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CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
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{
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struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
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&conn->data->state.negotiate;
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char *encoded = NULL;
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size_t len = 0;
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char *userp;
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CURLcode error;
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error = Curl_base64_encode(conn->data,
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(const char*)neg_ctx->output_token,
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neg_ctx->output_token_length,
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&encoded, &len);
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if(error)
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return error;
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if(len == 0)
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return CURLE_REMOTE_ACCESS_DENIED;
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userp = aprintf("%sAuthorization: %s %s\r\n", proxy ? "Proxy-" : "",
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neg_ctx->protocol, encoded);
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if(proxy)
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conn->allocptr.proxyuserpwd = userp;
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else
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conn->allocptr.userpwd = userp;
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free(encoded);
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Curl_cleanup_negotiate (conn->data);
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return (userp == NULL) ? CURLE_OUT_OF_MEMORY : CURLE_OK;
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}
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static void cleanup(struct negotiatedata *neg_ctx)
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{
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if(neg_ctx->context) {
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s_pSecFn->DeleteSecurityContext(neg_ctx->context);
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free(neg_ctx->context);
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neg_ctx->context = 0;
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}
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if(neg_ctx->credentials) {
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s_pSecFn->FreeCredentialsHandle(neg_ctx->credentials);
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free(neg_ctx->credentials);
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neg_ctx->credentials = 0;
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}
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if(neg_ctx->output_token) {
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free(neg_ctx->output_token);
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neg_ctx->output_token = 0;
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}
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neg_ctx->max_token_length = 0;
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}
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void Curl_cleanup_negotiate(struct SessionHandle *data)
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{
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cleanup(&data->state.negotiate);
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cleanup(&data->state.proxyneg);
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}
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#endif
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#endif
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