353 lines
12 KiB
C
353 lines
12 KiB
C
/***********************************************************************
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*
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* Copyright (C) 2006 Novell, Inc. All Rights Reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; version 2.1
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* of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, Novell, Inc.
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*
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* To contact Novell about this file by physical or electronic mail,
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* you may find current contact information at www.novell.com.
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*
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* Author: Juan Carlos Luciani <jluciani@novell.com>
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*
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***********************************************************************/
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//===[ Include files ]=====================================================
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#include "internal.h"
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//===[ Type definitions ]==================================================
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//===[ Function prototypes ]===============================================
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//===[ Global variables ]==================================================
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//++=======================================================================
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static
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CasaStatus
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GetUserCredentials(
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IN const char *pRealm,
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IN void *pCredStoreScope,
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INOUT char **ppUsername,
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INOUT char **ppPassword)
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//
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// Arguments:
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// pRealm -
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// The realm to which the credentials apply.
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//
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// pCredStoreScope -
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// Pointer to CASA structure for scoping credential store access
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// to specific users. This can only be leveraged when running in
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// the context of System under Windows.
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//
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// ppUsername -
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// Pointer to variable that will receive buffer with the username.
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//
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// ppPassword -
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// Pointer to variable that will receive buffer with the password.
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//
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// Returns:
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// Casa Status
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//
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// Description:
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// Get authentication credentials for the specified realm.
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//
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// L2
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//=======================================================================--
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{
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CasaStatus retStatus = CasaStatusBuild(CASA_SEVERITY_ERROR,
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CASA_FACILITY_PWTOKEN,
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CASA_STATUS_UNSUCCESSFUL);
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char *pUsername;
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char *pPassword;
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int rcode = NSSCS_E_OBJECT_NOT_FOUND;
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uint32_t credtype = SSCS_CRED_TYPE_BASIC_F;
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SSCS_BASIC_CREDENTIAL credential = {0};
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SSCS_SECRET_ID_T secretId = {0};
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DbgTrace(1, "-GetUserCredentials- Start\n", 0);
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// Initialize output parameters
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*ppUsername = NULL;
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*ppPassword = NULL;
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// Get the length of the realm string into the secret id structure
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// and verify thatr it is not too long.
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secretId.len = sscs_Utf8Strlen(pRealm) + 1;
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if (secretId.len <= NSSCS_MAX_SECRET_ID_LEN)
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{
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// Set the secret id in the structure
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sscs_Utf8Strcpy((char*) secretId.id, pRealm);
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// Specify that we want the common name
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credential.unFlags = USERNAME_TYPE_CN_F;
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// Now try to get the credentials
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rcode = miCASAGetCredential(0,
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&secretId,
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NULL,
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&credtype,
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&credential,
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(SSCS_EXT_T*) pCredStoreScope);
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if (rcode != NSSCS_SUCCESS)
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{
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// There were no credentials for the realm, now try to obtain the
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// desktop credentials.
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secretId.len = sscs_Utf8Strlen("Desktop") + 1;
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sscs_Utf8Strcpy((char*) secretId.id, "Desktop");
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rcode = miCASAGetCredential(0,
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&secretId,
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NULL,
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&credtype,
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&credential,
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(SSCS_EXT_T*) pCredStoreScope);
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}
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}
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else
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{
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DbgTrace(0, "-GetUserCredentials- Realm name too long\n", 0);
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retStatus = CasaStatusBuild(CASA_SEVERITY_ERROR,
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CASA_FACILITY_PWTOKEN,
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CASA_STATUS_UNSUCCESSFUL);
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}
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// Proceed based on the result of the operatiosn above
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if (rcode == NSSCS_SUCCESS
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&& credential.username != NULL
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&& credential.password != NULL)
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{
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// Allocate a buffer to return the username
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pUsername = (char*) malloc(strlen((char*) credential.username) + 1);
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if (pUsername)
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{
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// Copy the username into the buffer that we will be returning
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strcpy(pUsername, (char*) credential.username);
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// Allocate a buffer to return the password
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pPassword = (char*) malloc(strlen((char*) credential.password) + 1);
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if (pPassword)
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{
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// Copy the password into the buffer that we will be returning
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strcpy(pPassword, (char*) credential.password);
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DbgTrace(1, "-GetUserCredentials- Username = %s\n", pUsername);
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// Success
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retStatus = CASA_STATUS_SUCCESS;
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}
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else
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{
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DbgTrace(0, "-GetUserCredentials- Buffer allocation error\n", 0);
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retStatus = CasaStatusBuild(CASA_SEVERITY_ERROR,
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CASA_FACILITY_PWTOKEN,
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CASA_STATUS_INSUFFICIENT_RESOURCES);
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// Free the buffer allocated for the username
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free(pUsername);
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}
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}
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else
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{
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DbgTrace(0, "-GetUserCredentials- Buffer allocation error\n", 0);
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retStatus = CasaStatusBuild(CASA_SEVERITY_ERROR,
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CASA_FACILITY_PWTOKEN,
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CASA_STATUS_INSUFFICIENT_RESOURCES);
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}
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}
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else
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{
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DbgTrace(0, "-GetUserCredentials- Failed to obtain credentials for pw authentication\n", 0);
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}
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// Return the buffers to the caller if successful
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if (CASA_SUCCESS(retStatus))
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{
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*ppUsername = pUsername;
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*ppPassword = pPassword;
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}
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DbgTrace(1, "-GetUserCredentials- End, retStatus = %08X\n", retStatus);
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return retStatus;
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}
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//++=======================================================================
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CasaStatus SSCS_CALL
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AuthTokenIf_GetAuthToken(
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IN const void *pIfInstance,
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IN const char *pContext,
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IN const char *pMechInfo,
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IN const char *pHostName,
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IN void *pCredStoreScope,
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INOUT char *pTokenBuf,
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INOUT int *pTokenBufLen)
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//
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// Arguments:
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// pIfInstance -
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// Pointer to interface object.
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//
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// pContext -
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// Pointer to null terminated string containing mechanism specific
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// context information. Another name for context is Authentication
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// Realm.
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//
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// pMechInfo -
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// Pointer to null terminated string containing mechanism specific
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// information. This is information is provided by the server to
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// aid the mechanism to generate an authentication token. For
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// example, the mechanism information for a Kerberos mechanism
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// may be the service principal name to which the user will be
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// authenticating.
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//
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// pHostName -
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// Pointer to null terminated string containing the name of the
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// host where the ATS resides.
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//
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// pCredStoreScope -
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// Pointer to CASA structure for scoping credential store access
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// to specific users. This can only be leveraged when running in
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// the context of System under Windows.
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//
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// pTokenBuf -
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// Pointer to buffer that will receive the authentication
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// token. The length of this buffer is specified by the
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// pTokenBufLen parameter. Note that the the authentication
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// token will be in the form of a NULL terminated string.
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//
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// pTokenBufLen -
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// Pointer to integer that contains the length of the
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// buffer pointed at by pTokenBuf. Upon return of the
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// function, the integer will contain the actual length
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// of the authentication token if the function successfully
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// completes or the buffer length required if the function
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// fails because the buffer pointed at by pUserNameBuf is
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// not large enough.
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//
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// Returns:
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// Casa Status
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//
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// Description:
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// Get authentication token to authenticate user to specified service.
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//
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// L2
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//=======================================================================--
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{
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CasaStatus retStatus;
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char *pUsername = NULL;
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char *pPassword = NULL;
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char *pToken;
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DbgTrace(1, "-AuthTokenIf_GetAuthToken- Start\n", 0);
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// Validate input parameters
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if (pIfInstance == NULL
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|| pContext == NULL
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|| pHostName == NULL
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|| pTokenBufLen == NULL
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|| (pTokenBuf == NULL && *pTokenBufLen != 0))
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{
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DbgTrace(0, "-AuthTokenIf_GetAuthToken- Invalid input parameter\n", 0);
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retStatus = CasaStatusBuild(CASA_SEVERITY_ERROR,
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CASA_FACILITY_PWTOKEN,
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CASA_STATUS_INVALID_PARAMETER);
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goto exit;
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}
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// Get the user credentials
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retStatus = GetUserCredentials(pContext,
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pCredStoreScope,
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&pUsername,
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&pPassword);
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if (CASA_SUCCESS(retStatus))
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{
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// Now construct the PW token with the following format:
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// "username\r\n" + "password\r\n"
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//
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// First allocate a buffer large enough to hold the token
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pToken = (char*) malloc(strlen(pUsername) + 2 + strlen(pPassword) + 2 + 1);
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if (pToken)
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{
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char *pEncodedToken;
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int encodedTokenLen;
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// Now assemble the token
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sprintf(pToken, "%s\r\n%s\r\n", pUsername, pPassword);
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// The token has been assembled, now encode it.
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retStatus = EncodeData(pToken,
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(const int) strlen(pToken),
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&pEncodedToken,
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&encodedTokenLen);
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if (CASA_SUCCESS(retStatus))
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{
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// Verify that the caller provided a buffer that is big enough
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if (encodedTokenLen > *pTokenBufLen)
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{
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// The buffer is not big enough
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retStatus = CasaStatusBuild(CASA_SEVERITY_ERROR,
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CASA_FACILITY_PWTOKEN,
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CASA_STATUS_BUFFER_OVERFLOW);
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}
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else
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{
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// The buffer provided is large enough, copy the data.
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memcpy((void*) pTokenBuf, pEncodedToken, encodedTokenLen);
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// Success
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retStatus = CASA_STATUS_SUCCESS;
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}
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// Return the actual size or the size required
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*pTokenBufLen = encodedTokenLen;
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// Free the buffer containing the encoded token
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free(pEncodedToken);
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}
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// Free the buffer allocated for the token
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free(pToken);
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}
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else
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{
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DbgTrace(0, "-AuthTokenIf_GetAuthToken- Buffer allocation error\n", 0);
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retStatus = CasaStatusBuild(CASA_SEVERITY_ERROR,
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CASA_FACILITY_PWTOKEN,
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CASA_STATUS_INSUFFICIENT_RESOURCES);
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}
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// Free allocated buffers
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free(pUsername);
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free(pPassword);
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}
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else
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{
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DbgTrace(1, "-AuthTokenIf_GetAuthToken- Failed to obtain the user credentials\n", 0);
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}
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exit:
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DbgTrace(1, "-AuthTokenIf_GetAuthToken- End, retStatus = %08X\n", retStatus);
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return retStatus;
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}
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//++=======================================================================
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//++=======================================================================
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//++=======================================================================
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