/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2016, 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 https://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(USE_WINDOWS_SSPI) && defined(USE_NTLM) #include <curl/curl.h> #include "vauth/vauth.h" #include "urldata.h" #include "curl_base64.h" #include "warnless.h" #include "curl_multibyte.h" #include "sendf.h" /* The last #include files should be: */ #include "curl_memory.h" #include "memdebug.h" /* * Curl_auth_create_ntlm_type1_message() * * This is used to generate an already encoded NTLM type-1 message ready for * sending to the recipient. * * Parameters: * * userp [in] - The user name in the format User or Domain\User. * passdwp [in] - The user's password. * ntlm [in/out] - The NTLM data struct being used and modified. * outptr [in/out] - The address where a pointer to newly allocated memory * holding the result will be stored upon completion. * outlen [out] - The length of the output message. * * Returns CURLE_OK on success. */ CURLcode Curl_auth_create_ntlm_type1_message(const char *userp, const char *passwdp, struct ntlmdata *ntlm, char **outptr, size_t *outlen) { PSecPkgInfo SecurityPackage; SecBuffer type_1_buf; SecBufferDesc type_1_desc; SECURITY_STATUS status; unsigned long attrs; TimeStamp expiry; /* For Windows 9x compatibility of SSPI calls */ /* Clean up any former leftovers and initialise to defaults */ Curl_auth_ntlm_cleanup(ntlm); /* Query the security package for NTLM */ status = s_pSecFn->QuerySecurityPackageInfo((TCHAR *) TEXT(SP_NAME_NTLM), &SecurityPackage); if(status != SEC_E_OK) return CURLE_NOT_BUILT_IN; ntlm->token_max = SecurityPackage->cbMaxToken; /* Release the package buffer as it is not required anymore */ s_pSecFn->FreeContextBuffer(SecurityPackage); /* Allocate our output buffer */ ntlm->output_token = malloc(ntlm->token_max); if(!ntlm->output_token) return CURLE_OUT_OF_MEMORY; if(userp && *userp) { CURLcode result; /* Populate our identity structure */ result = Curl_create_sspi_identity(userp, passwdp, &ntlm->identity); if(result) return result; /* Allow proper cleanup of the identity structure */ ntlm->p_identity = &ntlm->identity; } else /* Use the current Windows user */ ntlm->p_identity = NULL; /* Allocate our credentials handle */ ntlm->credentials = malloc(sizeof(CredHandle)); if(!ntlm->credentials) return CURLE_OUT_OF_MEMORY; memset(ntlm->credentials, 0, sizeof(CredHandle)); /* Acquire our credentials handle */ status = s_pSecFn->AcquireCredentialsHandle(NULL, (TCHAR *) TEXT(SP_NAME_NTLM), SECPKG_CRED_OUTBOUND, NULL, ntlm->p_identity, NULL, NULL, ntlm->credentials, &expiry); if(status != SEC_E_OK) return CURLE_LOGIN_DENIED; /* Allocate our new context handle */ ntlm->context = malloc(sizeof(CtxtHandle)); if(!ntlm->context) return CURLE_OUT_OF_MEMORY; memset(ntlm->context, 0, sizeof(CtxtHandle)); /* Setup the type-1 "output" security buffer */ type_1_desc.ulVersion = SECBUFFER_VERSION; type_1_desc.cBuffers = 1; type_1_desc.pBuffers = &type_1_buf; type_1_buf.BufferType = SECBUFFER_TOKEN; type_1_buf.pvBuffer = ntlm->output_token; type_1_buf.cbBuffer = curlx_uztoul(ntlm->token_max); /* Generate our type-1 message */ status = s_pSecFn->InitializeSecurityContext(ntlm->credentials, NULL, (TCHAR *) TEXT(""), 0, 0, SECURITY_NETWORK_DREP, NULL, 0, ntlm->context, &type_1_desc, &attrs, &expiry); if(status == SEC_I_COMPLETE_NEEDED || status == SEC_I_COMPLETE_AND_CONTINUE) s_pSecFn->CompleteAuthToken(ntlm->context, &type_1_desc); else if(status != SEC_E_OK && status != SEC_I_CONTINUE_NEEDED) return CURLE_RECV_ERROR; /* Base64 encode the response */ return Curl_base64_encode(NULL, (char *) ntlm->output_token, type_1_buf.cbBuffer, outptr, outlen); } /* * Curl_auth_decode_ntlm_type2_message() * * This is used to decode an already encoded NTLM type-2 message. * * Parameters: * * data [in] - The session handle. * type2msg [in] - The base64 encoded type-2 message. * ntlm [in/out] - The NTLM data struct being used and modified. * * Returns CURLE_OK on success. */ CURLcode Curl_auth_decode_ntlm_type2_message(struct SessionHandle *data, const char *type2msg, struct ntlmdata *ntlm) { CURLcode result = CURLE_OK; unsigned char *type2 = NULL; size_t type2_len = 0; #if defined(CURL_DISABLE_VERBOSE_STRINGS) (void) data; #endif /* Decode the base-64 encoded type-2 message */ if(strlen(type2msg) && *type2msg != '=') { result = Curl_base64_decode(type2msg, &type2, &type2_len); if(result) return result; } /* Ensure we have a valid type-2 message */ if(!type2) { infof(data, "NTLM handshake failure (empty type-2 message)\n"); return CURLE_BAD_CONTENT_ENCODING; } /* Simply store the challenge for use later */ ntlm->input_token = type2; ntlm->input_token_len = type2_len; return result; } /* * Curl_auth_create_ntlm_type3_message() * Curl_auth_create_ntlm_type3_message() * * This is used to generate an already encoded NTLM type-3 message ready for * sending to the recipient. * * Parameters: * * data [in] - The session handle. * userp [in] - The user name in the format User or Domain\User. * passdwp [in] - The user's password. * ntlm [in/out] - The NTLM data struct being used and modified. * outptr [in/out] - The address where a pointer to newly allocated memory * holding the result will be stored upon completion. * outlen [out] - The length of the output message. * * Returns CURLE_OK on success. */ CURLcode Curl_auth_create_ntlm_type3_message(struct SessionHandle *data, const char *userp, const char *passwdp, struct ntlmdata *ntlm, char **outptr, size_t *outlen) { CURLcode result = CURLE_OK; SecBuffer type_2_buf; SecBuffer type_3_buf; SecBufferDesc type_2_desc; SecBufferDesc type_3_desc; SECURITY_STATUS status; unsigned long attrs; TimeStamp expiry; /* For Windows 9x compatibility of SSPI calls */ (void) passwdp; (void) userp; /* Setup the type-2 "input" security buffer */ type_2_desc.ulVersion = SECBUFFER_VERSION; type_2_desc.cBuffers = 1; type_2_desc.pBuffers = &type_2_buf; type_2_buf.BufferType = SECBUFFER_TOKEN; type_2_buf.pvBuffer = ntlm->input_token; type_2_buf.cbBuffer = curlx_uztoul(ntlm->input_token_len); /* Setup the type-3 "output" security buffer */ type_3_desc.ulVersion = SECBUFFER_VERSION; type_3_desc.cBuffers = 1; type_3_desc.pBuffers = &type_3_buf; type_3_buf.BufferType = SECBUFFER_TOKEN; type_3_buf.pvBuffer = ntlm->output_token; type_3_buf.cbBuffer = curlx_uztoul(ntlm->token_max); /* Generate our type-3 message */ status = s_pSecFn->InitializeSecurityContext(ntlm->credentials, ntlm->context, (TCHAR *) TEXT(""), 0, 0, SECURITY_NETWORK_DREP, &type_2_desc, 0, ntlm->context, &type_3_desc, &attrs, &expiry); if(status != SEC_E_OK) { infof(data, "NTLM handshake failure (type-3 message): Status=%x\n", status); return CURLE_RECV_ERROR; } /* Base64 encode the response */ result = Curl_base64_encode(data, (char *) ntlm->output_token, type_3_buf.cbBuffer, outptr, outlen); Curl_auth_ntlm_cleanup(ntlm); return result; } /* * Curl_auth_ntlm_cleanup() * * This is used to clean up the NTLM specific data. * * Parameters: * * ntlm [in/out] - The NTLM data struct being cleaned up. * */ void Curl_auth_ntlm_cleanup(struct ntlmdata *ntlm) { /* Free our security context */ if(ntlm->context) { s_pSecFn->DeleteSecurityContext(ntlm->context); free(ntlm->context); ntlm->context = NULL; } /* Free our credentials handle */ if(ntlm->credentials) { s_pSecFn->FreeCredentialsHandle(ntlm->credentials); free(ntlm->credentials); ntlm->credentials = NULL; } /* Free our identity */ Curl_sspi_free_identity(ntlm->p_identity); ntlm->p_identity = NULL; /* Free the input and output tokens */ Curl_safefree(ntlm->input_token); Curl_safefree(ntlm->output_token); /* Reset any variables */ ntlm->token_max = 0; } #endif /* USE_WINDOWS_SSPI && USE_NTLM */