diff options
Diffstat (limited to 'lib/curl_sasl_sspi.c')
| -rw-r--r-- | lib/curl_sasl_sspi.c | 445 |
1 files changed, 0 insertions, 445 deletions
diff --git a/lib/curl_sasl_sspi.c b/lib/curl_sasl_sspi.c index 5ecab65ec..d3dde2cfe 100644 --- a/lib/curl_sasl_sspi.c +++ b/lib/curl_sasl_sspi.c @@ -322,449 +322,4 @@ void Curl_sasl_ntlm_cleanup(struct ntlmdata *ntlm) } #endif /* USE_NTLM */ -#if defined(USE_KERBEROS5) -/* - * Curl_sasl_create_gssapi_user_message() - * - * This is used to generate an already encoded GSSAPI (Kerberos V5) user token - * 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. - * service [in] - The service type such as www, smtp, pop or imap. - * mutual_auth [in] - Flag specifing whether or not mutual authentication - * is enabled. - * chlg64 [in] - The optional base64 encoded challenge message. - * krb5 [in/out] - The Kerberos 5 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_sasl_create_gssapi_user_message(struct SessionHandle *data, - const char *userp, - const char *passwdp, - const char *service, - const bool mutual_auth, - const char *chlg64, - struct kerberos5data *krb5, - char **outptr, size_t *outlen) -{ - CURLcode result = CURLE_OK; - size_t chlglen = 0; - unsigned char *chlg = NULL; - CtxtHandle context; - PSecPkgInfo SecurityPackage; - SecBuffer chlg_buf; - SecBuffer resp_buf; - SecBufferDesc chlg_desc; - SecBufferDesc resp_desc; - SECURITY_STATUS status; - unsigned long attrs; - TimeStamp expiry; /* For Windows 9x compatibility of SSPI calls */ - - if(!krb5->credentials) { - /* Query the security package for Kerberos */ - status = s_pSecFn->QuerySecurityPackageInfo((TCHAR *) - TEXT(SP_NAME_KERBEROS), - &SecurityPackage); - if(status != SEC_E_OK) { - return CURLE_NOT_BUILT_IN; - } - - krb5->token_max = SecurityPackage->cbMaxToken; - - /* Release the package buffer as it is not required anymore */ - s_pSecFn->FreeContextBuffer(SecurityPackage); - - /* Allocate our response buffer */ - krb5->output_token = malloc(krb5->token_max); - if(!krb5->output_token) - return CURLE_OUT_OF_MEMORY; - - /* Generate our SPN */ - krb5->spn = Curl_sasl_build_spn(service, data->easy_conn->host.name); - if(!krb5->spn) - return CURLE_OUT_OF_MEMORY; - - if(userp && *userp) { - /* Populate our identity structure */ - result = Curl_create_sspi_identity(userp, passwdp, &krb5->identity); - if(result) - return result; - - /* Allow proper cleanup of the identity structure */ - krb5->p_identity = &krb5->identity; - } - else - /* Use the current Windows user */ - krb5->p_identity = NULL; - - /* Allocate our credentials handle */ - krb5->credentials = malloc(sizeof(CredHandle)); - if(!krb5->credentials) - return CURLE_OUT_OF_MEMORY; - - memset(krb5->credentials, 0, sizeof(CredHandle)); - - /* Acquire our credentials handle */ - status = s_pSecFn->AcquireCredentialsHandle(NULL, - (TCHAR *) - TEXT(SP_NAME_KERBEROS), - SECPKG_CRED_OUTBOUND, NULL, - krb5->p_identity, NULL, NULL, - krb5->credentials, &expiry); - if(status != SEC_E_OK) - return CURLE_LOGIN_DENIED; - - /* Allocate our new context handle */ - krb5->context = malloc(sizeof(CtxtHandle)); - if(!krb5->context) - return CURLE_OUT_OF_MEMORY; - - memset(krb5->context, 0, sizeof(CtxtHandle)); - } - else { - /* Decode the base-64 encoded challenge message */ - if(strlen(chlg64) && *chlg64 != '=') { - result = Curl_base64_decode(chlg64, &chlg, &chlglen); - if(result) - return result; - } - - /* Ensure we have a valid challenge message */ - if(!chlg) { - infof(data, "GSSAPI handshake failure (empty challenge message)\n"); - - return CURLE_BAD_CONTENT_ENCODING; - } - - /* Setup the challenge "input" security buffer */ - chlg_desc.ulVersion = SECBUFFER_VERSION; - chlg_desc.cBuffers = 1; - chlg_desc.pBuffers = &chlg_buf; - chlg_buf.BufferType = SECBUFFER_TOKEN; - chlg_buf.pvBuffer = chlg; - chlg_buf.cbBuffer = curlx_uztoul(chlglen); - } - - /* Setup the response "output" security buffer */ - resp_desc.ulVersion = SECBUFFER_VERSION; - resp_desc.cBuffers = 1; - resp_desc.pBuffers = &resp_buf; - resp_buf.BufferType = SECBUFFER_TOKEN; - resp_buf.pvBuffer = krb5->output_token; - resp_buf.cbBuffer = curlx_uztoul(krb5->token_max); - - /* Generate our challenge-response message */ - status = s_pSecFn->InitializeSecurityContext(krb5->credentials, - chlg ? krb5->context : NULL, - krb5->spn, - (mutual_auth ? - ISC_REQ_MUTUAL_AUTH : 0), - 0, SECURITY_NATIVE_DREP, - chlg ? &chlg_desc : NULL, 0, - &context, - &resp_desc, &attrs, - &expiry); - - if(status != SEC_E_OK && status != SEC_I_CONTINUE_NEEDED) { - free(chlg); - - return CURLE_RECV_ERROR; - } - - if(memcmp(&context, krb5->context, sizeof(context))) { - s_pSecFn->DeleteSecurityContext(krb5->context); - - memcpy(krb5->context, &context, sizeof(context)); - } - - if(resp_buf.cbBuffer) { - /* Base64 encode the response */ - result = Curl_base64_encode(data, (char *)resp_buf.pvBuffer, - resp_buf.cbBuffer, outptr, outlen); - } - - /* Free the decoded challenge */ - free(chlg); - - return result; -} - -/* - * Curl_sasl_create_gssapi_security_message() - * - * This is used to generate an already encoded GSSAPI (Kerberos V5) security - * token message ready for sending to the recipient. - * - * Parameters: - * - * data [in] - The session handle. - * chlg64 [in] - The optional base64 encoded challenge message. - * krb5 [in/out] - The Kerberos 5 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_sasl_create_gssapi_security_message(struct SessionHandle *data, - const char *chlg64, - struct kerberos5data *krb5, - char **outptr, - size_t *outlen) -{ - CURLcode result = CURLE_OK; - size_t offset = 0; - size_t chlglen = 0; - size_t messagelen = 0; - size_t appdatalen = 0; - unsigned char *chlg = NULL; - unsigned char *trailer = NULL; - unsigned char *message = NULL; - unsigned char *padding = NULL; - unsigned char *appdata = NULL; - SecBuffer input_buf[2]; - SecBuffer wrap_buf[3]; - SecBufferDesc input_desc; - SecBufferDesc wrap_desc; - unsigned long indata = 0; - unsigned long outdata = 0; - unsigned long qop = 0; - unsigned long sec_layer = 0; - unsigned long max_size = 0; - SecPkgContext_Sizes sizes; - SecPkgCredentials_Names names; - SECURITY_STATUS status; - char *user_name; - - /* Decode the base-64 encoded input message */ - if(strlen(chlg64) && *chlg64 != '=') { - result = Curl_base64_decode(chlg64, &chlg, &chlglen); - if(result) - return result; - } - - /* Ensure we have a valid challenge message */ - if(!chlg) { - infof(data, "GSSAPI handshake failure (empty security message)\n"); - - return CURLE_BAD_CONTENT_ENCODING; - } - - /* Get our response size information */ - status = s_pSecFn->QueryContextAttributes(krb5->context, - SECPKG_ATTR_SIZES, - &sizes); - if(status != SEC_E_OK) { - free(chlg); - - return CURLE_OUT_OF_MEMORY; - } - - /* Get the fully qualified username back from the context */ - status = s_pSecFn->QueryCredentialsAttributes(krb5->credentials, - SECPKG_CRED_ATTR_NAMES, - &names); - if(status != SEC_E_OK) { - free(chlg); - - return CURLE_RECV_ERROR; - } - - /* Setup the "input" security buffer */ - input_desc.ulVersion = SECBUFFER_VERSION; - input_desc.cBuffers = 2; - input_desc.pBuffers = input_buf; - input_buf[0].BufferType = SECBUFFER_STREAM; - input_buf[0].pvBuffer = chlg; - input_buf[0].cbBuffer = curlx_uztoul(chlglen); - input_buf[1].BufferType = SECBUFFER_DATA; - input_buf[1].pvBuffer = NULL; - input_buf[1].cbBuffer = 0; - - /* Decrypt the inbound challenge and obtain the qop */ - status = s_pSecFn->DecryptMessage(krb5->context, &input_desc, 0, &qop); - if(status != SEC_E_OK) { - infof(data, "GSSAPI handshake failure (empty security message)\n"); - - free(chlg); - - return CURLE_BAD_CONTENT_ENCODING; - } - - /* Not 4 octets long so fail as per RFC4752 Section 3.1 */ - if(input_buf[1].cbBuffer != 4) { - infof(data, "GSSAPI handshake failure (invalid security data)\n"); - - free(chlg); - - return CURLE_BAD_CONTENT_ENCODING; - } - - /* Copy the data out and free the challenge as it is not required anymore */ - memcpy(&indata, input_buf[1].pvBuffer, 4); - s_pSecFn->FreeContextBuffer(input_buf[1].pvBuffer); - free(chlg); - - /* Extract the security layer */ - sec_layer = indata & 0x000000FF; - if(!(sec_layer & KERB_WRAP_NO_ENCRYPT)) { - infof(data, "GSSAPI handshake failure (invalid security layer)\n"); - - return CURLE_BAD_CONTENT_ENCODING; - } - - /* Extract the maximum message size the server can receive */ - max_size = ntohl(indata & 0xFFFFFF00); - if(max_size > 0) { - /* The server has told us it supports a maximum receive buffer, however, as - we don't require one unless we are encrypting data, we tell the server - our receive buffer is zero. */ - max_size = 0; - } - - /* Allocate the trailer */ - trailer = malloc(sizes.cbSecurityTrailer); - if(!trailer) - return CURLE_OUT_OF_MEMORY; - - /* Convert the user name to UTF8 when operating with Unicode */ - user_name = Curl_convert_tchar_to_UTF8(names.sUserName); - if(!user_name) { - free(trailer); - - return CURLE_OUT_OF_MEMORY; - } - - /* Allocate our message */ - messagelen = sizeof(outdata) + strlen(user_name) + 1; - message = malloc(messagelen); - if(!message) { - free(trailer); - Curl_unicodefree(user_name); - - return CURLE_OUT_OF_MEMORY; - } - - /* Populate the message with the security layer, client supported receive - message size and authorization identity including the 0x00 based - terminator. Note: Dispite RFC4752 Section 3.1 stating "The authorization - identity is not terminated with the zero-valued (%x00) octet." it seems - necessary to include it. */ - outdata = htonl(max_size) | sec_layer; - memcpy(message, &outdata, sizeof(outdata)); - strcpy((char *) message + sizeof(outdata), user_name); - Curl_unicodefree(user_name); - - /* Allocate the padding */ - padding = malloc(sizes.cbBlockSize); - if(!padding) { - free(message); - free(trailer); - - return CURLE_OUT_OF_MEMORY; - } - - /* Setup the "authentication data" security buffer */ - wrap_desc.ulVersion = SECBUFFER_VERSION; - wrap_desc.cBuffers = 3; - wrap_desc.pBuffers = wrap_buf; - wrap_buf[0].BufferType = SECBUFFER_TOKEN; - wrap_buf[0].pvBuffer = trailer; - wrap_buf[0].cbBuffer = sizes.cbSecurityTrailer; - wrap_buf[1].BufferType = SECBUFFER_DATA; - wrap_buf[1].pvBuffer = message; - wrap_buf[1].cbBuffer = curlx_uztoul(messagelen); - wrap_buf[2].BufferType = SECBUFFER_PADDING; - wrap_buf[2].pvBuffer = padding; - wrap_buf[2].cbBuffer = sizes.cbBlockSize; - - /* Encrypt the data */ - status = s_pSecFn->EncryptMessage(krb5->context, KERB_WRAP_NO_ENCRYPT, - &wrap_desc, 0); - if(status != SEC_E_OK) { - free(padding); - free(message); - free(trailer); - - return CURLE_OUT_OF_MEMORY; - } - - /* Allocate the encryption (wrap) buffer */ - appdatalen = wrap_buf[0].cbBuffer + wrap_buf[1].cbBuffer + - wrap_buf[2].cbBuffer; - appdata = malloc(appdatalen); - if(!appdata) { - free(padding); - free(message); - free(trailer); - - return CURLE_OUT_OF_MEMORY; - } - - /* Populate the encryption buffer */ - memcpy(appdata, wrap_buf[0].pvBuffer, wrap_buf[0].cbBuffer); - offset += wrap_buf[0].cbBuffer; - memcpy(appdata + offset, wrap_buf[1].pvBuffer, wrap_buf[1].cbBuffer); - offset += wrap_buf[1].cbBuffer; - memcpy(appdata + offset, wrap_buf[2].pvBuffer, wrap_buf[2].cbBuffer); - - /* Base64 encode the response */ - result = Curl_base64_encode(data, (char *)appdata, appdatalen, outptr, - outlen); - - /* Free all of our local buffers */ - free(appdata); - free(padding); - free(message); - free(trailer); - - return result; -} - -/* - * Curl_sasl_gssapi_cleanup() - * - * This is used to clean up the GSSAPI (Kerberos V5) specific data. - * - * Parameters: - * - * krb5 [in/out] - The Kerberos 5 data struct being cleaned up. - * - */ -void Curl_sasl_gssapi_cleanup(struct kerberos5data *krb5) -{ - /* Free our security context */ - if(krb5->context) { - s_pSecFn->DeleteSecurityContext(krb5->context); - free(krb5->context); - krb5->context = NULL; - } - - /* Free our credentials handle */ - if(krb5->credentials) { - s_pSecFn->FreeCredentialsHandle(krb5->credentials); - free(krb5->credentials); - krb5->credentials = NULL; - } - - /* Free our identity */ - Curl_sspi_free_identity(krb5->p_identity); - krb5->p_identity = NULL; - - /* Free the SPN and output token */ - Curl_safefree(krb5->spn); - Curl_safefree(krb5->output_token); - - /* Reset any variables */ - krb5->token_max = 0; -} -#endif /* USE_KERBEROS5 */ - #endif /* USE_WINDOWS_SSPI */ |