| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) 1998 - 2012, 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 "setup.h" |
| |
| #ifdef USE_WINDOWS_SSPI |
| |
| #ifndef CURL_DISABLE_HTTP |
| |
| #include "urldata.h" |
| #include "sendf.h" |
| #include "rawstr.h" |
| #include "warnless.h" |
| #include "curl_base64.h" |
| #include "http_negotiate.h" |
| #include "curl_memory.h" |
| |
| #define _MPRINTF_REPLACE /* use our functions only */ |
| #include <curl/mprintf.h> |
| |
| /* The last #include file should be: */ |
| #include "memdebug.h" |
| |
| static int |
| get_gss_name(struct connectdata *conn, bool proxy, |
| struct negotiatedata *neg_ctx) |
| { |
| const char* service; |
| size_t length; |
| |
| if(proxy && !conn->proxy.name) |
| /* proxy auth requested but no given proxy name, error out! */ |
| return -1; |
| |
| /* GSSAPI implementation by Globus (known as GSI) requires the name to be |
| of form "<service>/<fqdn>" instead of <service>@<fqdn> (ie. slash instead |
| of at-sign). Also GSI servers are often identified as 'host' not 'khttp'. |
| Change following lines if you want to use GSI */ |
| |
| /* IIS uses the <service>@<fqdn> form but uses 'http' as the service name, |
| and SSPI then generates an NTLM token. When using <service>/<fqdn> a |
| Kerberos token is generated. */ |
| |
| if(neg_ctx->gss) |
| service = "KHTTP"; |
| else |
| service = "HTTP"; |
| |
| length = strlen(service) + 1 + strlen(proxy ? conn->proxy.name : |
| conn->host.name) + 1; |
| if(length + 1 > sizeof(neg_ctx->server_name)) |
| return EMSGSIZE; |
| |
| snprintf(neg_ctx->server_name, sizeof(neg_ctx->server_name), "%s/%s", |
| service, proxy ? conn->proxy.name : conn->host.name); |
| |
| return 0; |
| } |
| |
| /* returning zero (0) means success, everything else is treated as "failure" |
| with no care exactly what the failure was */ |
| int Curl_input_negotiate(struct connectdata *conn, bool proxy, |
| const char *header) |
| { |
| struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg: |
| &conn->data->state.negotiate; |
| BYTE *input_token = 0; |
| SecBufferDesc out_buff_desc; |
| SecBuffer out_sec_buff; |
| SecBufferDesc in_buff_desc; |
| SecBuffer in_sec_buff; |
| ULONG context_attributes; |
| TimeStamp lifetime; |
| |
| int ret; |
| size_t len = 0, input_token_len = 0; |
| bool gss = FALSE; |
| const char* protocol; |
| CURLcode error; |
| |
| while(*header && ISSPACE(*header)) |
| header++; |
| |
| if(checkprefix("GSS-Negotiate", header)) { |
| protocol = "GSS-Negotiate"; |
| gss = TRUE; |
| } |
| else if(checkprefix("Negotiate", header)) { |
| protocol = "Negotiate"; |
| gss = FALSE; |
| } |
| else |
| return -1; |
| |
| if(neg_ctx->context) { |
| if(neg_ctx->gss != gss) { |
| return -1; |
| } |
| } |
| else { |
| neg_ctx->protocol = protocol; |
| neg_ctx->gss = gss; |
| } |
| |
| 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 -1; |
| } |
| |
| if(0 == strlen(neg_ctx->server_name)) { |
| ret = get_gss_name(conn, proxy, neg_ctx); |
| if(ret) |
| return ret; |
| } |
| |
| if(!neg_ctx->output_token) { |
| PSecPkgInfo SecurityPackage; |
| ret = s_pSecFn->QuerySecurityPackageInfo((SEC_CHAR *)"Negotiate", |
| &SecurityPackage); |
| if(ret != SEC_E_OK) |
| return -1; |
| |
| /* Allocate input and output buffers according to the max token size |
| as indicated by the security package */ |
| neg_ctx->max_token_length = SecurityPackage->cbMaxToken; |
| neg_ctx->output_token = malloc(neg_ctx->max_token_length); |
| s_pSecFn->FreeContextBuffer(SecurityPackage); |
| } |
| |
| /* Obtain the input token, if any */ |
| header += strlen(neg_ctx->protocol); |
| while(*header && ISSPACE(*header)) |
| header++; |
| |
| len = strlen(header); |
| if(!len) { |
| /* first call in a new negotation, 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 -1; |
| |
| neg_ctx->status = |
| s_pSecFn->AcquireCredentialsHandle(NULL, (SEC_CHAR *)"Negotiate", |
| SECPKG_CRED_OUTBOUND, NULL, NULL, |
| NULL, NULL, neg_ctx->credentials, |
| &lifetime); |
| if(neg_ctx->status != SEC_E_OK) |
| return -1; |
| } |
| else { |
| input_token = malloc(neg_ctx->max_token_length); |
| if(!input_token) |
| return -1; |
| |
| error = Curl_base64_decode(header, |
| (unsigned char **)&input_token, |
| &input_token_len); |
| if(error || input_token_len == 0) |
| return -1; |
| } |
| |
| /* prepare the output buffers, and input buffers if present */ |
| out_buff_desc.ulVersion = 0; |
| out_buff_desc.cBuffers = 1; |
| out_buff_desc.pBuffers = &out_sec_buff; |
| |
| out_sec_buff.cbBuffer = curlx_uztoul(neg_ctx->max_token_length); |
| out_sec_buff.BufferType = SECBUFFER_TOKEN; |
| out_sec_buff.pvBuffer = neg_ctx->output_token; |
| |
| |
| if(input_token) { |
| in_buff_desc.ulVersion = 0; |
| in_buff_desc.cBuffers = 1; |
| in_buff_desc.pBuffers = &in_sec_buff; |
| |
| in_sec_buff.cbBuffer = curlx_uztoul(input_token_len); |
| in_sec_buff.BufferType = SECBUFFER_TOKEN; |
| in_sec_buff.pvBuffer = input_token; |
| } |
| |
| neg_ctx->status = s_pSecFn->InitializeSecurityContext( |
| neg_ctx->credentials, |
| input_token ? neg_ctx->context : 0, |
| neg_ctx->server_name, |
| ISC_REQ_CONFIDENTIALITY, |
| 0, |
| SECURITY_NATIVE_DREP, |
| input_token ? &in_buff_desc : 0, |
| 0, |
| neg_ctx->context, |
| &out_buff_desc, |
| &context_attributes, |
| &lifetime); |
| |
| if(GSS_ERROR(neg_ctx->status)) |
| return -1; |
| |
| 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 -1; |
| } |
| |
| neg_ctx->output_token_length = out_sec_buff.cbBuffer; |
| |
| return 0; |
| } |
| |
| |
| 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 == 0) |
| return CURLE_REMOTE_ACCESS_DENIED; |
| |
| userp = aprintf("%sAuthorization: %s %s\r\n", proxy ? "Proxy-" : "", |
| neg_ctx->protocol, encoded); |
| |
| if(proxy) |
| conn->allocptr.proxyuserpwd = userp; |
| else |
| conn->allocptr.userpwd = userp; |
| free(encoded); |
| Curl_cleanup_negotiate (conn->data); |
| return (userp == NULL) ? CURLE_OUT_OF_MEMORY : CURLE_OK; |
| } |
| |
| static void cleanup(struct negotiatedata *neg_ctx) |
| { |
| if(neg_ctx->context) { |
| s_pSecFn->DeleteSecurityContext(neg_ctx->context); |
| free(neg_ctx->context); |
| neg_ctx->context = 0; |
| } |
| |
| if(neg_ctx->credentials) { |
| s_pSecFn->FreeCredentialsHandle(neg_ctx->credentials); |
| free(neg_ctx->credentials); |
| neg_ctx->credentials = 0; |
| } |
| |
| if(neg_ctx->output_token) { |
| free(neg_ctx->output_token); |
| neg_ctx->output_token = 0; |
| } |
| |
| neg_ctx->max_token_length = 0; |
| } |
| |
| void Curl_cleanup_negotiate(struct SessionHandle *data) |
| { |
| cleanup(&data->state.negotiate); |
| cleanup(&data->state.proxyneg); |
| } |
| |
| |
| #endif |
| #endif |
