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-rw-r--r--libcurl/src/lib/http_negotiate_sspi.c298
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diff --git a/libcurl/src/lib/http_negotiate_sspi.c b/libcurl/src/lib/http_negotiate_sspi.c
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+++ b/libcurl/src/lib/http_negotiate_sspi.c
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+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#ifdef USE_WINDOWS_SSPI
+
+#if !defined(CURL_DISABLE_HTTP) && defined(USE_SPNEGO)
+
+#include "urldata.h"
+#include "sendf.h"
+#include "rawstr.h"
+#include "warnless.h"
+#include "curl_base64.h"
+#include "curl_sasl.h"
+#include "http_negotiate.h"
+#include "curl_multibyte.h"
+#include "curl_printf.h"
+
+/* The last #include files should be: */
+#include "curl_memory.h"
+#include "memdebug.h"
+
+CURL_STATIC CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,
+ const char *header)
+{
+ BYTE *input_token = NULL;
+ SecBufferDesc out_buff_desc;
+ SecBuffer out_sec_buff;
+ SecBufferDesc in_buff_desc;
+ SecBuffer in_sec_buff;
+ SECURITY_STATUS status;
+ unsigned long attrs;
+ TimeStamp expiry; /* For Windows 9x compatibility of SSPI calls */
+ size_t len = 0, input_token_len = 0;
+ CURLcode result;
+
+ /* Point to the username and password */
+ const char *userp;
+ const char *passwdp;
+
+ /* Point to the correct struct with this */
+ struct negotiatedata *neg_ctx;
+
+ if(proxy) {
+ userp = conn->proxyuser;
+ passwdp = conn->proxypasswd;
+ neg_ctx = &conn->data->state.proxyneg;
+ }
+ else {
+ userp = conn->user;
+ passwdp = conn->passwd;
+ neg_ctx = &conn->data->state.negotiate;
+ }
+
+ /* Not set means empty */
+ if(!userp)
+ userp = "";
+
+ if(!passwdp)
+ passwdp = "";
+
+ if(neg_ctx->context && neg_ctx->status == SEC_E_OK) {
+ /* We finished successfully our part of authentication, but server
+ * rejected it (since we're again here). Exit with an error since we
+ * can't invent anything better */
+ Curl_cleanup_negotiate(conn->data);
+ return CURLE_LOGIN_DENIED;
+ }
+
+ if(!neg_ctx->server_name) {
+ /* Check proxy auth requested but no given proxy name */
+ if(proxy && !conn->proxy.name)
+ return CURLE_BAD_FUNCTION_ARGUMENT;
+
+ /* Generate our SPN */
+ neg_ctx->server_name = Curl_sasl_build_spn("HTTP",
+ proxy ? conn->proxy.name :
+ conn->host.name);
+ if(!neg_ctx->server_name)
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ if(!neg_ctx->output_token) {
+ PSecPkgInfo SecurityPackage;
+ status = s_pSecFn->QuerySecurityPackageInfo((TCHAR *)
+ TEXT(SP_NAME_NEGOTIATE),
+ &SecurityPackage);
+ if(status != SEC_E_OK)
+ return CURLE_NOT_BUILT_IN;
+
+ /* Allocate input and output buffers according to the max token size
+ as indicated by the security package */
+ neg_ctx->token_max = SecurityPackage->cbMaxToken;
+ neg_ctx->output_token = malloc(neg_ctx->token_max);
+ s_pSecFn->FreeContextBuffer(SecurityPackage);
+ }
+
+ /* Obtain the input token, if any */
+ header += strlen("Negotiate");
+ while(*header && ISSPACE(*header))
+ header++;
+
+ len = strlen(header);
+ if(!len) {
+ /* Is this the first call in a new negotiation? */
+ if(neg_ctx->context) {
+ /* The server rejected our authentication and hasn't suppled any more
+ negotiation mechanisms */
+ return CURLE_LOGIN_DENIED;
+ }
+
+ /* We have to acquire credentials and allocate memory for the context */
+ neg_ctx->credentials = malloc(sizeof(CredHandle));
+ neg_ctx->context = malloc(sizeof(CtxtHandle));
+
+ if(!neg_ctx->credentials || !neg_ctx->context)
+ return CURLE_OUT_OF_MEMORY;
+
+ if(userp && *userp) {
+ /* Populate our identity structure */
+ result = Curl_create_sspi_identity(userp, passwdp, &neg_ctx->identity);
+ if(result)
+ return result;
+
+ /* Allow proper cleanup of the identity structure */
+ neg_ctx->p_identity = &neg_ctx->identity;
+ }
+ else
+ /* Use the current Windows user */
+ neg_ctx->p_identity = NULL;
+
+ /* Acquire our credientials handle */
+ neg_ctx->status =
+ s_pSecFn->AcquireCredentialsHandle(NULL,
+ (TCHAR *) TEXT(SP_NAME_NEGOTIATE),
+ SECPKG_CRED_OUTBOUND, NULL,
+ neg_ctx->p_identity, NULL, NULL,
+ neg_ctx->credentials, &expiry);
+ if(neg_ctx->status != SEC_E_OK)
+ return CURLE_LOGIN_DENIED;
+ }
+ else {
+ result = Curl_base64_decode(header,
+ (unsigned char **)&input_token,
+ &input_token_len);
+ if(result)
+ return result;
+
+ if(!input_token_len) {
+ infof(conn->data,
+ "Negotiate handshake failure (empty challenge message)\n");
+
+ return CURLE_BAD_CONTENT_ENCODING;
+ }
+ }
+
+ /* Setup the "output" security buffer */
+ out_buff_desc.ulVersion = SECBUFFER_VERSION;
+ out_buff_desc.cBuffers = 1;
+ out_buff_desc.pBuffers = &out_sec_buff;
+ out_sec_buff.BufferType = SECBUFFER_TOKEN;
+ out_sec_buff.pvBuffer = neg_ctx->output_token;
+ out_sec_buff.cbBuffer = curlx_uztoul(neg_ctx->token_max);
+
+ /* Setup the "input" security buffer if present */
+ if(input_token) {
+ in_buff_desc.ulVersion = SECBUFFER_VERSION;
+ in_buff_desc.cBuffers = 1;
+ in_buff_desc.pBuffers = &in_sec_buff;
+ in_sec_buff.BufferType = SECBUFFER_TOKEN;
+ in_sec_buff.pvBuffer = input_token;
+ in_sec_buff.cbBuffer = curlx_uztoul(input_token_len);
+ }
+
+ /* Generate our message */
+ neg_ctx->status = s_pSecFn->InitializeSecurityContext(
+ neg_ctx->credentials,
+ input_token ? neg_ctx->context : NULL,
+ neg_ctx->server_name,
+ ISC_REQ_CONFIDENTIALITY,
+ 0,
+ SECURITY_NATIVE_DREP,
+ input_token ? &in_buff_desc : NULL,
+ 0,
+ neg_ctx->context,
+ &out_buff_desc,
+ &attrs,
+ &expiry);
+
+ free(input_token);
+
+ if(GSS_ERROR(neg_ctx->status))
+ return CURLE_OUT_OF_MEMORY;
+
+ if(neg_ctx->status == SEC_I_COMPLETE_NEEDED ||
+ neg_ctx->status == SEC_I_COMPLETE_AND_CONTINUE) {
+ neg_ctx->status = s_pSecFn->CompleteAuthToken(neg_ctx->context,
+ &out_buff_desc);
+ if(GSS_ERROR(neg_ctx->status))
+ return CURLE_RECV_ERROR;
+ }
+
+ neg_ctx->output_token_length = out_sec_buff.cbBuffer;
+
+ return CURLE_OK;
+}
+
+CURL_STATIC CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
+{
+ struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
+ &conn->data->state.negotiate;
+ char *encoded = NULL;
+ size_t len = 0;
+ char *userp;
+ CURLcode error;
+
+ error = Curl_base64_encode(conn->data,
+ (const char*)neg_ctx->output_token,
+ neg_ctx->output_token_length,
+ &encoded, &len);
+ if(error)
+ return error;
+
+ if(!len)
+ return CURLE_REMOTE_ACCESS_DENIED;
+
+ userp = aprintf("%sAuthorization: Negotiate %s\r\n", proxy ? "Proxy-" : "",
+ encoded);
+
+ if(proxy) {
+ Curl_safefree(conn->allocptr.proxyuserpwd);
+ conn->allocptr.proxyuserpwd = userp;
+ }
+ else {
+ Curl_safefree(conn->allocptr.userpwd);
+ conn->allocptr.userpwd = userp;
+ }
+ free(encoded);
+ return (userp == NULL) ? CURLE_OUT_OF_MEMORY : CURLE_OK;
+}
+
+static void cleanup(struct negotiatedata *neg_ctx)
+{
+ /* Free our security context */
+ if(neg_ctx->context) {
+ s_pSecFn->DeleteSecurityContext(neg_ctx->context);
+ free(neg_ctx->context);
+ neg_ctx->context = NULL;
+ }
+
+ /* Free our credentials handle */
+ if(neg_ctx->credentials) {
+ s_pSecFn->FreeCredentialsHandle(neg_ctx->credentials);
+ free(neg_ctx->credentials);
+ neg_ctx->credentials = NULL;
+ }
+
+ /* Free our identity */
+ Curl_sspi_free_identity(neg_ctx->p_identity);
+ neg_ctx->p_identity = NULL;
+
+ /* Free the SPN and output token */
+ Curl_safefree(neg_ctx->server_name);
+ Curl_safefree(neg_ctx->output_token);
+
+ /* Reset any variables */
+ neg_ctx->token_max = 0;
+}
+
+CURL_STATIC void Curl_cleanup_negotiate(struct SessionHandle *data)
+{
+ cleanup(&data->state.negotiate);
+ cleanup(&data->state.proxyneg);
+}
+
+#endif /* !CURL_DISABLE_HTTP && USE_SPNEGO */
+
+#endif /* USE_WINDOWS_SSPI */