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-rw-r--r--libcurl/src/lib/http_negotiate.c208
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diff --git a/libcurl/src/lib/http_negotiate.c b/libcurl/src/lib/http_negotiate.c
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+++ b/libcurl/src/lib/http_negotiate.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"
+
+#if defined(HAVE_GSSAPI) && !defined(CURL_DISABLE_HTTP) && defined(USE_SPNEGO)
+
+#include "urldata.h"
+#include "sendf.h"
+#include "curl_gssapi.h"
+#include "rawstr.h"
+#include "curl_base64.h"
+#include "http_negotiate.h"
+#include "curl_sasl.h"
+#include "url.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)
+{
+ struct SessionHandle *data = conn->data;
+ struct negotiatedata *neg_ctx = proxy?&data->state.proxyneg:
+ &data->state.negotiate;
+ OM_uint32 major_status, minor_status, discard_st;
+ gss_buffer_desc spn_token = GSS_C_EMPTY_BUFFER;
+ gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
+ gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
+ size_t len;
+ size_t rawlen = 0;
+ CURLcode result;
+
+ if(neg_ctx->context && neg_ctx->status == GSS_S_COMPLETE) {
+ /* 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(data);
+ return CURLE_LOGIN_DENIED;
+ }
+
+ if(!neg_ctx->server_name) {
+ /* Generate our SPN */
+ char *spn = Curl_sasl_build_gssapi_spn("HTTP", proxy ? conn->proxy.name :
+ conn->host.name);
+ if(!spn)
+ return CURLE_OUT_OF_MEMORY;
+
+ /* Populate the SPN structure */
+ spn_token.value = spn;
+ spn_token.length = strlen(spn);
+
+ /* Import the SPN */
+ major_status = gss_import_name(&minor_status, &spn_token,
+ GSS_C_NT_HOSTBASED_SERVICE,
+ &neg_ctx->server_name);
+ if(GSS_ERROR(major_status)) {
+ Curl_gss_log_error(data, minor_status, "gss_import_name() failed: ");
+
+ free(spn);
+
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ free(spn);
+ }
+
+ header += strlen("Negotiate");
+ while(*header && ISSPACE(*header))
+ header++;
+
+ len = strlen(header);
+ if(len > 0) {
+ result = Curl_base64_decode(header, (unsigned char **)&input_token.value,
+ &rawlen);
+ if(result)
+ return result;
+
+ if(!rawlen) {
+ infof(data, "Negotiate handshake failure (empty challenge message)\n");
+
+ return CURLE_BAD_CONTENT_ENCODING;
+ }
+
+ input_token.length = rawlen;
+
+ DEBUGASSERT(input_token.value != NULL);
+ }
+
+ major_status = Curl_gss_init_sec_context(data,
+ &minor_status,
+ &neg_ctx->context,
+ neg_ctx->server_name,
+ &Curl_spnego_mech_oid,
+ GSS_C_NO_CHANNEL_BINDINGS,
+ &input_token,
+ &output_token,
+ TRUE,
+ NULL);
+ Curl_safefree(input_token.value);
+
+ neg_ctx->status = major_status;
+ if(GSS_ERROR(major_status)) {
+ if(output_token.value)
+ gss_release_buffer(&discard_st, &output_token);
+ Curl_gss_log_error(conn->data, minor_status,
+ "gss_init_sec_context() failed: ");
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ if(!output_token.value || !output_token.length) {
+ if(output_token.value)
+ gss_release_buffer(&discard_st, &output_token);
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ neg_ctx->output_token = output_token;
+
+ 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 result;
+ OM_uint32 discard_st;
+
+ result = Curl_base64_encode(conn->data,
+ neg_ctx->output_token.value,
+ neg_ctx->output_token.length,
+ &encoded, &len);
+ if(result) {
+ gss_release_buffer(&discard_st, &neg_ctx->output_token);
+ neg_ctx->output_token.value = NULL;
+ neg_ctx->output_token.length = 0;
+ return result;
+ }
+
+ if(!encoded || !len) {
+ gss_release_buffer(&discard_st, &neg_ctx->output_token);
+ neg_ctx->output_token.value = NULL;
+ neg_ctx->output_token.length = 0;
+ 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)
+{
+ OM_uint32 minor_status;
+ if(neg_ctx->context != GSS_C_NO_CONTEXT)
+ gss_delete_sec_context(&minor_status, &neg_ctx->context, GSS_C_NO_BUFFER);
+
+ if(neg_ctx->output_token.value)
+ gss_release_buffer(&minor_status, &neg_ctx->output_token);
+
+ if(neg_ctx->server_name != GSS_C_NO_NAME)
+ gss_release_name(&minor_status, &neg_ctx->server_name);
+
+ memset(neg_ctx, 0, sizeof(*neg_ctx));
+}
+
+CURL_STATIC void Curl_cleanup_negotiate(struct SessionHandle *data)
+{
+ cleanup(&data->state.negotiate);
+ cleanup(&data->state.proxyneg);
+}
+
+#endif /* HAVE_GSSAPI && !CURL_DISABLE_HTTP && USE_SPNEGO */