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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) 1998 - 2011, 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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+
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+#ifdef USE_WINDOWS_SSPI
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+
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+#ifndef CURL_DISABLE_HTTP
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+/* -- WIN32 approved -- */
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+#include <stdio.h>
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+#include <string.h>
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+#include <stdarg.h>
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+#include <stdlib.h>
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+#include <ctype.h>
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+
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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 "curl_base64.h"
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+#include "http_negotiate.h"
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+#include "curl_memory.h"
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+
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+#define _MPRINTF_REPLACE /* use our functions only */
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+#include <curl/mprintf.h>
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+
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+/* The last #include file should be: */
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+#include "memdebug.h"
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+
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+static int
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+get_gss_name(struct connectdata *conn, bool proxy, char *server)
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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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+ const char* service;
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+ size_t length;
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+
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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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+
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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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+
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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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+
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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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+
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+ snprintf(server, sizeof(neg_ctx->server_name), "%s/%s",
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+ service, proxy ? conn->proxy.name : conn->host.name);
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+
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+ return 0;
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+}
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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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+
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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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+
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+ while(*header && ISSPACE(*header))
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+ header++;
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+
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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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+
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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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+
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+ if(neg_ctx->context && neg_ctx->status == SEC_E_OK) {
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+ /* We finished succesfully 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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+
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+ if(strlen(neg_ctx->server_name) == 0 &&
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+ (ret = get_gss_name(conn, proxy, neg_ctx->server_name)))
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+ return ret;
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+
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+ if (!neg_ctx->max_token_length) {
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+ PSecPkgInfo SecurityPackage;
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+ ret = s_pSecFn->QuerySecurityPackageInfo("Negotiate", &SecurityPackage);
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+ if (ret != SEC_E_OK)
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+ return -1;
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+
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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 = (BYTE *)malloc(neg_ctx->max_token_length);
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+ s_pSecFn->FreeContextBuffer(SecurityPackage);
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+ }
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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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+
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+ len = strlen(header);
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+ if(len > 0) {
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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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+
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+ input_token_len = Curl_base64_decode(header,
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+ (unsigned char **)&input_token);
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+ if(input_token_len == 0)
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+ return -1;
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+ }
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+
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+ if ( !input_token ) {
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+ /* first call in a new negotation, we have to require credentials,
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+ and allocate memory for the context */
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+
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+ neg_ctx->credentials = (CredHandle *)malloc(sizeof(CredHandle));
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+ neg_ctx->context = (CtxtHandle *)malloc(sizeof(CtxtHandle));
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+
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+ if ( !neg_ctx->credentials || !neg_ctx->context)
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+ return -1;
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+
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+ neg_ctx->status =
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+ s_pSecFn->AcquireCredentialsHandle(NULL, "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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+
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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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+
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+ out_sec_buff.cbBuffer = 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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+
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+
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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 = &out_sec_buff;
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+
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+ in_sec_buff.cbBuffer = 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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+
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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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+ neg_ctx->server_name,
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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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+
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+ if ( GSS_ERROR(neg_ctx->status) )
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+ return -1;
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+
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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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+
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+ neg_ctx->output_token_length = out_sec_buff.cbBuffer;
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+
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+ return 0;
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+}
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+
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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;
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+ char *userp;
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+
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+ len = Curl_base64_encode(conn->data,
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+ neg_ctx->output_token,
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+ neg_ctx->output_token_length,
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+ &encoded);
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+
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+ if(len == 0)
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+ return CURLE_OUT_OF_MEMORY;
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+
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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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+
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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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+
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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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+
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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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+
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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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+}
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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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+
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+
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+#endif
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+#endif
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Marcel Roelofs