| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) 2009, 2011, Markus Moeller, <markus_moeller@compuserve.com> |
| * |
| * 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 |
| |
| #include "urldata.h" |
| #include "sendf.h" |
| #include "connect.h" |
| #include "timeval.h" |
| #include "socks.h" |
| #include "curl_sspi.h" |
| #include "warnless.h" |
| |
| #define _MPRINTF_REPLACE /* use the internal *printf() functions */ |
| #include <curl/mprintf.h> |
| |
| #include "curl_memory.h" |
| /* The last #include file should be: */ |
| #include "memdebug.h" |
| |
| /* |
| * Definitions required from ntsecapi.h are directly provided below this point |
| * to avoid including ntsecapi.h due to a conflict with OpenSSL's safestack.h |
| */ |
| #define KERB_WRAP_NO_ENCRYPT 0x80000001 |
| |
| /* |
| * Helper sspi error functions. |
| */ |
| static int check_sspi_err(struct SessionHandle *data, |
| SECURITY_STATUS major_status, |
| SECURITY_STATUS minor_status, |
| const char* function) |
| { |
| const char *txt; |
| (void)minor_status; |
| |
| if(major_status != SEC_E_OK && |
| major_status != SEC_I_COMPLETE_AND_CONTINUE && |
| major_status != SEC_I_COMPLETE_NEEDED && |
| major_status != SEC_I_CONTINUE_NEEDED) { |
| failf(data, "SSPI error: %s failed: %d\n", function, major_status); |
| switch (major_status) { |
| case SEC_I_COMPLETE_AND_CONTINUE: |
| txt="SEC_I_COMPLETE_AND_CONTINUE"; |
| break; |
| case SEC_I_COMPLETE_NEEDED: |
| txt="SEC_I_COMPLETE_NEEDED"; |
| break; |
| case SEC_I_CONTINUE_NEEDED: |
| txt="SEC_I_CONTINUE_NEEDED"; |
| break; |
| case SEC_I_CONTEXT_EXPIRED: |
| txt="SEC_I_CONTEXT_EXPIRED"; |
| break; |
| case SEC_I_INCOMPLETE_CREDENTIALS: |
| txt="SEC_I_INCOMPLETE_CREDENTIALS"; |
| break; |
| case SEC_I_RENEGOTIATE: |
| txt="SEC_I_RENEGOTIATE"; |
| break; |
| case SEC_E_BUFFER_TOO_SMALL: |
| txt="SEC_E_BUFFER_TOO_SMALL"; |
| break; |
| case SEC_E_CONTEXT_EXPIRED: |
| txt="SEC_E_CONTEXT_EXPIRED"; |
| break; |
| case SEC_E_CRYPTO_SYSTEM_INVALID: |
| txt="SEC_E_CRYPTO_SYSTEM_INVALID"; |
| break; |
| case SEC_E_INCOMPLETE_MESSAGE: |
| txt="SEC_E_INCOMPLETE_MESSAGE"; |
| break; |
| case SEC_E_INSUFFICIENT_MEMORY: |
| txt="SEC_E_INSUFFICIENT_MEMORY"; |
| break; |
| case SEC_E_INTERNAL_ERROR: |
| txt="SEC_E_INTERNAL_ERROR"; |
| break; |
| case SEC_E_INVALID_HANDLE: |
| txt="SEC_E_INVALID_HANDLE"; |
| break; |
| case SEC_E_INVALID_TOKEN: |
| txt="SEC_E_INVALID_TOKEN"; |
| break; |
| case SEC_E_LOGON_DENIED: |
| txt="SEC_E_LOGON_DENIED"; |
| break; |
| case SEC_E_MESSAGE_ALTERED: |
| txt="SEC_E_MESSAGE_ALTERED"; |
| break; |
| case SEC_E_NO_AUTHENTICATING_AUTHORITY: |
| txt="SEC_E_NO_AUTHENTICATING_AUTHORITY"; |
| break; |
| case SEC_E_NO_CREDENTIALS: |
| txt="SEC_E_NO_CREDENTIALS"; |
| break; |
| case SEC_E_NOT_OWNER: |
| txt="SEC_E_NOT_OWNER"; |
| break; |
| case SEC_E_OUT_OF_SEQUENCE: |
| txt="SEC_E_OUT_OF_SEQUENCE"; |
| break; |
| case SEC_E_QOP_NOT_SUPPORTED: |
| txt="SEC_E_QOP_NOT_SUPPORTED"; |
| break; |
| case SEC_E_SECPKG_NOT_FOUND: |
| txt="SEC_E_SECPKG_NOT_FOUND"; |
| break; |
| case SEC_E_TARGET_UNKNOWN: |
| txt="SEC_E_TARGET_UNKNOWN"; |
| break; |
| case SEC_E_UNKNOWN_CREDENTIALS: |
| txt="SEC_E_UNKNOWN_CREDENTIALS"; |
| break; |
| case SEC_E_UNSUPPORTED_FUNCTION: |
| txt="SEC_E_UNSUPPORTED_FUNCTION"; |
| break; |
| case SEC_E_WRONG_PRINCIPAL: |
| txt="SEC_E_WRONG_PRINCIPAL"; |
| break; |
| default: |
| txt="Unknown error"; |
| |
| } |
| failf(data, "SSPI error: %s failed: %s\n", function, txt); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* This is the SSPI-using version of this function */ |
| CURLcode Curl_SOCKS5_gssapi_negotiate(int sockindex, |
| struct connectdata *conn) |
| { |
| struct SessionHandle *data = conn->data; |
| curl_socket_t sock = conn->sock[sockindex]; |
| CURLcode code; |
| ssize_t actualread; |
| ssize_t written; |
| int result; |
| /* Needs GSSAPI authentication */ |
| SECURITY_STATUS sspi_major_status, sspi_minor_status=0; |
| unsigned long sspi_ret_flags=0; |
| int gss_enc; |
| SecBuffer sspi_send_token, sspi_recv_token, sspi_w_token[3]; |
| SecBufferDesc input_desc, output_desc, wrap_desc; |
| SecPkgContext_Sizes sspi_sizes; |
| CredHandle cred_handle; |
| CtxtHandle sspi_context; |
| PCtxtHandle context_handle = NULL; |
| SecPkgCredentials_Names names; |
| TimeStamp expiry; |
| char *service_name=NULL; |
| unsigned short us_length; |
| ULONG qop; |
| unsigned char socksreq[4]; /* room for gssapi exchange header only */ |
| char *service = data->set.str[STRING_SOCKS5_GSSAPI_SERVICE]; |
| |
| /* GSSAPI request looks like |
| * +----+------+-----+----------------+ |
| * |VER | MTYP | LEN | TOKEN | |
| * +----+------+----------------------+ |
| * | 1 | 1 | 2 | up to 2^16 - 1 | |
| * +----+------+-----+----------------+ |
| */ |
| |
| /* prepare service name */ |
| if(strchr(service, '/')) { |
| service_name = malloc(strlen(service)); |
| if(!service_name) |
| return CURLE_OUT_OF_MEMORY; |
| memcpy(service_name, service, strlen(service)); |
| } |
| else { |
| service_name = malloc(strlen(service) + strlen(conn->proxy.name) + 2); |
| if(!service_name) |
| return CURLE_OUT_OF_MEMORY; |
| snprintf(service_name,strlen(service) +strlen(conn->proxy.name)+2,"%s/%s", |
| service,conn->proxy.name); |
| } |
| |
| input_desc.cBuffers = 1; |
| input_desc.pBuffers = &sspi_recv_token; |
| input_desc.ulVersion = SECBUFFER_VERSION; |
| |
| sspi_recv_token.BufferType = SECBUFFER_TOKEN; |
| sspi_recv_token.cbBuffer = 0; |
| sspi_recv_token.pvBuffer = NULL; |
| |
| output_desc.cBuffers = 1; |
| output_desc.pBuffers = &sspi_send_token; |
| output_desc.ulVersion = SECBUFFER_VERSION; |
| |
| sspi_send_token.BufferType = SECBUFFER_TOKEN; |
| sspi_send_token.cbBuffer = 0; |
| sspi_send_token.pvBuffer = NULL; |
| |
| wrap_desc.cBuffers = 3; |
| wrap_desc.pBuffers = sspi_w_token; |
| wrap_desc.ulVersion = SECBUFFER_VERSION; |
| |
| cred_handle.dwLower = 0; |
| cred_handle.dwUpper = 0; |
| |
| sspi_major_status = |
| s_pSecFn->AcquireCredentialsHandleA( NULL, |
| (char *)"Kerberos", |
| SECPKG_CRED_OUTBOUND, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| &cred_handle, |
| &expiry); |
| |
| if(check_sspi_err(data, sspi_major_status,sspi_minor_status, |
| "AcquireCredentialsHandleA") ) { |
| failf(data, "Failed to acquire credentials."); |
| free(service_name); |
| service_name=NULL; |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| /* As long as we need to keep sending some context info, and there's no */ |
| /* errors, keep sending it... */ |
| for(;;) { |
| |
| sspi_major_status = s_pSecFn->InitializeSecurityContextA( |
| &cred_handle, |
| context_handle, |
| service_name, |
| ISC_REQ_MUTUAL_AUTH | |
| ISC_REQ_ALLOCATE_MEMORY | |
| ISC_REQ_CONFIDENTIALITY | |
| ISC_REQ_REPLAY_DETECT, |
| 0, |
| SECURITY_NATIVE_DREP, |
| &input_desc, |
| 0, |
| &sspi_context, |
| &output_desc, |
| &sspi_ret_flags, |
| &expiry); |
| |
| if(sspi_recv_token.pvBuffer) { |
| s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| sspi_recv_token.pvBuffer = NULL; |
| sspi_recv_token.cbBuffer = 0; |
| } |
| |
| if(check_sspi_err(data,sspi_major_status,sspi_minor_status, |
| "InitializeSecurityContextA") ) { |
| free(service_name); |
| service_name=NULL; |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| failf(data, "Failed to initialise security context."); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| if(sspi_send_token.cbBuffer != 0) { |
| socksreq[0] = 1; /* gssapi subnegotiation version */ |
| socksreq[1] = 1; /* authentication message type */ |
| us_length = htons((short)sspi_send_token.cbBuffer); |
| memcpy(socksreq+2, &us_length, sizeof(short)); |
| |
| code = Curl_write_plain(conn, sock, (char *)socksreq, 4, &written); |
| if((code != CURLE_OK) || (4 != written)) { |
| failf(data, "Failed to send SSPI authentication request."); |
| free(service_name); |
| service_name=NULL; |
| s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| code = Curl_write_plain(conn, sock, (char *)sspi_send_token.pvBuffer, |
| sspi_send_token.cbBuffer, &written); |
| if((code != CURLE_OK) || (sspi_send_token.cbBuffer != (size_t)written)) { |
| failf(data, "Failed to send SSPI authentication token."); |
| free(service_name); |
| service_name=NULL; |
| s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| } |
| |
| s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| sspi_send_token.pvBuffer = NULL; |
| sspi_send_token.cbBuffer = 0; |
| s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| sspi_recv_token.pvBuffer = NULL; |
| sspi_recv_token.cbBuffer = 0; |
| if(sspi_major_status != SEC_I_CONTINUE_NEEDED) break; |
| |
| /* analyse response */ |
| |
| /* GSSAPI response looks like |
| * +----+------+-----+----------------+ |
| * |VER | MTYP | LEN | TOKEN | |
| * +----+------+----------------------+ |
| * | 1 | 1 | 2 | up to 2^16 - 1 | |
| * +----+------+-----+----------------+ |
| */ |
| |
| result=Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread); |
| if(result != CURLE_OK || actualread != 4) { |
| failf(data, "Failed to receive SSPI authentication response."); |
| free(service_name); |
| service_name=NULL; |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| /* ignore the first (VER) byte */ |
| if(socksreq[1] == 255) { /* status / message type */ |
| failf(data, "User was rejected by the SOCKS5 server (%d %d).", |
| socksreq[0], socksreq[1]); |
| free(service_name); |
| service_name=NULL; |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| if(socksreq[1] != 1) { /* status / messgae type */ |
| failf(data, "Invalid SSPI authentication response type (%d %d).", |
| socksreq[0], socksreq[1]); |
| free(service_name); |
| service_name=NULL; |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| memcpy(&us_length, socksreq+2, sizeof(short)); |
| us_length = ntohs(us_length); |
| |
| sspi_recv_token.cbBuffer = us_length; |
| sspi_recv_token.pvBuffer = malloc(us_length); |
| |
| if(!sspi_recv_token.pvBuffer) { |
| free(service_name); |
| service_name=NULL; |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| result = Curl_blockread_all(conn, sock, (char *)sspi_recv_token.pvBuffer, |
| sspi_recv_token.cbBuffer, &actualread); |
| |
| if(result != CURLE_OK || actualread != us_length) { |
| failf(data, "Failed to receive SSPI authentication token."); |
| free(service_name); |
| service_name=NULL; |
| s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| context_handle = &sspi_context; |
| } |
| |
| free(service_name); |
| service_name=NULL; |
| |
| /* Everything is good so far, user was authenticated! */ |
| sspi_major_status = |
| s_pSecFn->QueryCredentialsAttributes( &cred_handle, |
| SECPKG_CRED_ATTR_NAMES, |
| &names); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| if(check_sspi_err(data,sspi_major_status,sspi_minor_status, |
| "QueryCredentialAttributes") ) { |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| s_pSecFn->FreeContextBuffer(names.sUserName); |
| failf(data, "Failed to determine user name."); |
| return CURLE_COULDNT_CONNECT; |
| } |
| infof(data, "SOCKS5 server authencticated user %s with gssapi.\n", |
| names.sUserName); |
| s_pSecFn->FreeContextBuffer(names.sUserName); |
| |
| /* Do encryption */ |
| socksreq[0] = 1; /* gssapi subnegotiation version */ |
| socksreq[1] = 2; /* encryption message type */ |
| |
| gss_enc = 0; /* no data protection */ |
| /* do confidentiality protection if supported */ |
| if(sspi_ret_flags & ISC_REQ_CONFIDENTIALITY) |
| gss_enc = 2; |
| /* else do integrity protection */ |
| else if(sspi_ret_flags & ISC_REQ_INTEGRITY) |
| gss_enc = 1; |
| |
| infof(data, "SOCKS5 server supports gssapi %s data protection.\n", |
| (gss_enc==0)?"no":((gss_enc==1)?"integrity":"confidentiality") ); |
| /* force to no data protection, avoid encryption/decryption for now */ |
| gss_enc = 0; |
| /* |
| * Sending the encryption type in clear seems wrong. It should be |
| * protected with gss_seal()/gss_wrap(). See RFC1961 extract below |
| * The NEC reference implementations on which this is based is |
| * therefore at fault |
| * |
| * +------+------+------+.......................+ |
| * + ver | mtyp | len | token | |
| * +------+------+------+.......................+ |
| * + 0x01 | 0x02 | 0x02 | up to 2^16 - 1 octets | |
| * +------+------+------+.......................+ |
| * |
| * Where: |
| * |
| * - "ver" is the protocol version number, here 1 to represent the |
| * first version of the SOCKS/GSS-API protocol |
| * |
| * - "mtyp" is the message type, here 2 to represent a protection |
| * -level negotiation message |
| * |
| * - "len" is the length of the "token" field in octets |
| * |
| * - "token" is the GSS-API encapsulated protection level |
| * |
| * The token is produced by encapsulating an octet containing the |
| * required protection level using gss_seal()/gss_wrap() with conf_req |
| * set to FALSE. The token is verified using gss_unseal()/ |
| * gss_unwrap(). |
| * |
| */ |
| |
| if(data->set.socks5_gssapi_nec) { |
| us_length = htons((short)1); |
| memcpy(socksreq+2, &us_length, sizeof(short)); |
| } |
| else { |
| sspi_major_status = s_pSecFn->QueryContextAttributesA( &sspi_context, |
| SECPKG_ATTR_SIZES, |
| &sspi_sizes); |
| if(check_sspi_err(data,sspi_major_status,sspi_minor_status, |
| "QueryContextAttributesA")) { |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| failf(data, "Failed to query security context attributes."); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| sspi_w_token[0].cbBuffer = sspi_sizes.cbSecurityTrailer; |
| sspi_w_token[0].BufferType = SECBUFFER_TOKEN; |
| sspi_w_token[0].pvBuffer = malloc(sspi_sizes.cbSecurityTrailer); |
| |
| if(!sspi_w_token[0].pvBuffer) { |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| |
| sspi_w_token[1].cbBuffer = 1; |
| sspi_w_token[1].pvBuffer = malloc(1); |
| if(!sspi_w_token[1].pvBuffer) { |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| |
| memcpy(sspi_w_token[1].pvBuffer,&gss_enc,1); |
| sspi_w_token[2].BufferType = SECBUFFER_PADDING; |
| sspi_w_token[2].cbBuffer = sspi_sizes.cbBlockSize; |
| sspi_w_token[2].pvBuffer = malloc(sspi_sizes.cbBlockSize); |
| if(!sspi_w_token[2].pvBuffer) { |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| sspi_major_status = s_pSecFn->EncryptMessage( &sspi_context, |
| KERB_WRAP_NO_ENCRYPT, |
| &wrap_desc, |
| 0); |
| if(check_sspi_err(data,sspi_major_status,sspi_minor_status, |
| "EncryptMessage") ) { |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| failf(data, "Failed to query security context attributes."); |
| return CURLE_COULDNT_CONNECT; |
| } |
| sspi_send_token.cbBuffer = sspi_w_token[0].cbBuffer |
| + sspi_w_token[1].cbBuffer |
| + sspi_w_token[2].cbBuffer; |
| sspi_send_token.pvBuffer = malloc(sspi_send_token.cbBuffer); |
| if(!sspi_send_token.pvBuffer) { |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| |
| memcpy(sspi_send_token.pvBuffer, sspi_w_token[0].pvBuffer, |
| sspi_w_token[0].cbBuffer); |
| memcpy((PUCHAR) sspi_send_token.pvBuffer +(int)sspi_w_token[0].cbBuffer, |
| sspi_w_token[1].pvBuffer, sspi_w_token[1].cbBuffer); |
| memcpy((PUCHAR) sspi_send_token.pvBuffer |
| +sspi_w_token[0].cbBuffer |
| +sspi_w_token[1].cbBuffer, |
| sspi_w_token[2].pvBuffer, sspi_w_token[2].cbBuffer); |
| |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| sspi_w_token[0].pvBuffer = NULL; |
| sspi_w_token[0].cbBuffer = 0; |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| sspi_w_token[1].pvBuffer = NULL; |
| sspi_w_token[1].cbBuffer = 0; |
| s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer); |
| sspi_w_token[2].pvBuffer = NULL; |
| sspi_w_token[2].cbBuffer = 0; |
| |
| us_length = htons((short)sspi_send_token.cbBuffer); |
| memcpy(socksreq+2,&us_length,sizeof(short)); |
| } |
| |
| code = Curl_write_plain(conn, sock, (char *)socksreq, 4, &written); |
| if((code != CURLE_OK) || (4 != written)) { |
| failf(data, "Failed to send SSPI encryption request."); |
| s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| if(data->set.socks5_gssapi_nec) { |
| memcpy(socksreq,&gss_enc,1); |
| code = Curl_write_plain(conn, sock, (char *)socksreq, 1, &written); |
| if((code != CURLE_OK) || (1 != written)) { |
| failf(data, "Failed to send SSPI encryption type."); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| } |
| else { |
| code = Curl_write_plain(conn, sock, (char *)sspi_send_token.pvBuffer, |
| sspi_send_token.cbBuffer, &written); |
| if((code != CURLE_OK) || (sspi_send_token.cbBuffer != (size_t)written)) { |
| failf(data, "Failed to send SSPI encryption type."); |
| s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| } |
| |
| result=Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread); |
| if(result != CURLE_OK || actualread != 4) { |
| failf(data, "Failed to receive SSPI encryption response."); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| /* ignore the first (VER) byte */ |
| if(socksreq[1] == 255) { /* status / message type */ |
| failf(data, "User was rejected by the SOCKS5 server (%d %d).", |
| socksreq[0], socksreq[1]); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| if(socksreq[1] != 2) { /* status / message type */ |
| failf(data, "Invalid SSPI encryption response type (%d %d).", |
| socksreq[0], socksreq[1]); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| memcpy(&us_length, socksreq+2, sizeof(short)); |
| us_length = ntohs(us_length); |
| |
| sspi_w_token[0].cbBuffer = us_length; |
| sspi_w_token[0].pvBuffer = malloc(us_length); |
| if(!sspi_w_token[0].pvBuffer) { |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| |
| result=Curl_blockread_all(conn, sock, (char *)sspi_w_token[0].pvBuffer, |
| sspi_w_token[0].cbBuffer, &actualread); |
| |
| if(result != CURLE_OK || actualread != us_length) { |
| failf(data, "Failed to receive SSPI encryption type."); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| |
| if(!data->set.socks5_gssapi_nec) { |
| wrap_desc.cBuffers = 2; |
| sspi_w_token[0].BufferType = SECBUFFER_STREAM; |
| sspi_w_token[1].BufferType = SECBUFFER_DATA; |
| sspi_w_token[1].cbBuffer = 0; |
| sspi_w_token[1].pvBuffer = NULL; |
| |
| sspi_major_status = s_pSecFn->DecryptMessage( &sspi_context, |
| &wrap_desc, |
| 0, |
| &qop); |
| |
| if(check_sspi_err(data,sspi_major_status,sspi_minor_status, |
| "DecryptMessage")) { |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| failf(data, "Failed to query security context attributes."); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| if(sspi_w_token[1].cbBuffer != 1) { |
| failf(data, "Invalid SSPI encryption response length (%d).", |
| sspi_w_token[1].cbBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| memcpy(socksreq,sspi_w_token[1].pvBuffer,sspi_w_token[1].cbBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| } |
| else { |
| if(sspi_w_token[0].cbBuffer != 1) { |
| failf(data, "Invalid SSPI encryption response length (%d).", |
| sspi_w_token[0].cbBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| memcpy(socksreq,sspi_w_token[0].pvBuffer,sspi_w_token[0].cbBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| } |
| |
| infof(data, "SOCKS5 access with%s protection granted.\n", |
| (socksreq[0]==0)?"out gssapi data": |
| ((socksreq[0]==1)?" gssapi integrity":" gssapi confidentiality")); |
| |
| /* For later use if encryption is required |
| conn->socks5_gssapi_enctype = socksreq[0]; |
| if(socksreq[0] != 0) |
| conn->socks5_sspi_context = sspi_context; |
| else { |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| conn->socks5_sspi_context = sspi_context; |
| } |
| */ |
| return CURLE_OK; |
| } |
| #endif |
