Fix 64bit build error for tizen dlog print format
[platform/upstream/iotivity.git] / resource / csdk / security / src / credresource.c
index b32d9dc..0bdaa5f 100644 (file)
@@ -38,7 +38,9 @@
 #include "base64.h"
 #include "ocserverrequest.h"
 #include "oic_malloc.h"
+#include "oic_string.h"
 #include "ocpayload.h"
+#include "ocpayloadcbor.h"
 #include "utlist.h"
 #include "credresource.h"
 #include "doxmresource.h"
 #include <fcntl.h>
 #include <unistd.h>
 #endif
+#define UNUSED(x) (void)(x)
 
-#ifdef __WITH_DTLS__
-#include "global.h"
-#endif
-
-#define TAG  "SRM-CREDL"
+#define TAG  "OIC_SRM_CREDL"
 
 /** Max credential types number used for TLS */
 #define MAX_TYPE 2
 static const uint16_t CBOR_SIZE = 2048;
 
 /** Max cbor size payload. */
-static const uint16_t CBOR_MAX_SIZE = 4400;
+//static const uint16_t CBOR_MAX_SIZE = 4400;
 
 /** CRED size - Number of mandatory items. */
 static const uint8_t CRED_ROOT_MAP_SIZE = 4;
 static const uint8_t CRED_MAP_SIZE = 3;
 
-
 static OicSecCred_t        *gCred = NULL;
 static OCResourceHandle    gCredHandle = NULL;
 
+#ifdef MULTIPLE_OWNER
+#define PRECONF_PIN_MIN_SIZE (8)
+#endif
+
 typedef enum CredCompareResult{
     CRED_CMP_EQUAL = 0,
     CRED_CMP_NOT_EQUAL = 1,
@@ -88,6 +90,142 @@ typedef enum CredCompareResult{
 }CredCompareResult_t;
 
 /**
+ * Internal function to check a subject of SIGNED_ASYMMETRIC_KEY(Certificate).
+ * If that subject is NULL or wildcard, set it to own deviceID.
+ * @param cred credential on SVR DB file
+ * @param deviceID own deviceuuid of doxm resource
+ *
+ * @return
+ *     true successfully done
+ *     false Invalid cred
+ */
+static bool CheckSubjectOfCertificate(OicSecCred_t* cred, OicUuid_t deviceID)
+{
+    UNUSED(deviceID);
+    OicUuid_t emptyUuid = {.id={0}};
+    UNUSED(emptyUuid);
+    OIC_LOG(DEBUG, TAG, "IN CheckSubjectOfCertificate");
+    VERIFY_NON_NULL(TAG, cred, ERROR);
+
+#if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
+    if ( SIGNED_ASYMMETRIC_KEY == cred->credType)
+    {
+        if((0 == memcmp(cred->subject.id, emptyUuid.id, sizeof(cred->subject.id))) ||
+            (0 == memcmp(cred->subject.id, &WILDCARD_SUBJECT_ID, sizeof(cred->subject.id))))
+        {
+            memcpy(cred->subject.id, deviceID.id, sizeof(deviceID.id));
+        }
+    }
+#endif
+
+    OIC_LOG(DEBUG, TAG, "OUT CheckSubjectOfCertificate");
+    return true;
+exit:
+    OIC_LOG(ERROR, TAG, "OUT CheckSubjectOfCertificate");
+    return false;
+}
+
+/**
+ * Internal function to check credential
+ */
+static bool IsValidCredential(const OicSecCred_t* cred)
+{
+    OicUuid_t emptyUuid = {.id={0}};
+
+
+    OIC_LOG(INFO, TAG, "IN IsValidCredential");
+
+    VERIFY_NON_NULL(TAG, cred, ERROR);
+    VERIFY_SUCCESS(TAG, 0 != cred->credId, ERROR);
+    OIC_LOG_V(DEBUG, TAG, "Cred ID = %d", cred->credId);
+
+#if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
+    OIC_LOG_V(DEBUG, TAG, "Cred Type = %d", cred->credType);
+
+    switch(cred->credType)
+    {
+        case SYMMETRIC_PAIR_WISE_KEY:
+        case SYMMETRIC_GROUP_KEY:
+        case PIN_PASSWORD:
+        {
+            VERIFY_NON_NULL(TAG, cred->privateData.data, ERROR);
+            VERIFY_SUCCESS(TAG, 0 != cred->privateData.len, ERROR);
+            VERIFY_SUCCESS(TAG, \
+                           (OIC_ENCODING_RAW == cred->privateData.encoding || \
+                           OIC_ENCODING_BASE64 == cred->privateData.encoding), \
+                           ERROR);
+            break;
+        }
+        case ASYMMETRIC_KEY:
+        {
+            VERIFY_NON_NULL(TAG, cred->publicData.data, ERROR);
+            VERIFY_SUCCESS(TAG, 0 != cred->publicData.len, ERROR);
+            VERIFY_SUCCESS(TAG, \
+                           (OIC_ENCODING_UNKNOW < cred->publicData.encoding && \
+                            OIC_ENCODING_DER >= cred->publicData.encoding),
+                           ERROR);
+            break;
+        }
+        case SIGNED_ASYMMETRIC_KEY:
+        {
+            VERIFY_SUCCESS(TAG, (NULL != cred->publicData.data ||NULL != cred->optionalData.data) , ERROR);
+            VERIFY_SUCCESS(TAG, (0 != cred->publicData.len || 0 != cred->optionalData.len), ERROR);
+
+            if(NULL != cred->optionalData.data)
+            {
+                VERIFY_SUCCESS(TAG, \
+                               (OIC_ENCODING_UNKNOW < cred->optionalData.encoding && \
+                                OIC_ENCODING_DER >= cred->optionalData.encoding),
+                               ERROR);
+            }
+            break;
+        }
+        case ASYMMETRIC_ENCRYPTION_KEY:
+        {
+            VERIFY_NON_NULL(TAG, cred->privateData.data, ERROR);
+            VERIFY_SUCCESS(TAG, 0 != cred->privateData.len, ERROR);
+            VERIFY_SUCCESS(TAG, \
+                           (OIC_ENCODING_UNKNOW < cred->privateData.encoding && \
+                            OIC_ENCODING_DER >= cred->privateData.encoding),
+                           ERROR);
+            break;
+        }
+        default:
+        {
+            OIC_LOG(WARNING, TAG, "Unknown credential type");
+            return false;
+        }
+    }
+#endif
+
+    VERIFY_SUCCESS(TAG, 0 != memcmp(emptyUuid.id, cred->subject.id, sizeof(cred->subject.id)), ERROR);
+
+    OIC_LOG(INFO, TAG, "OUT IsValidCredential : Credential are valid.");
+    return true;
+exit:
+    OIC_LOG(WARNING, TAG, "OUT IsValidCredential : Invalid Credential detected.");
+    return false;
+}
+
+static bool IsEmptyCred(const OicSecCred_t* cred)
+{
+    OicUuid_t emptyUuid = {.id={0}};
+
+    VERIFY_SUCCESS(TAG, (0 == memcmp(cred->subject.id, emptyUuid.id, sizeof(emptyUuid))), ERROR);
+    VERIFY_SUCCESS(TAG, (0 == cred->credId), ERROR);
+    VERIFY_SUCCESS(TAG, (0 == cred->credType), ERROR);
+#if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
+    VERIFY_SUCCESS(TAG, (NULL == cred->privateData.data), ERROR);
+    VERIFY_SUCCESS(TAG, (NULL == cred->publicData.data), ERROR);
+    VERIFY_SUCCESS(TAG, (NULL == cred->optionalData.data), ERROR);
+    VERIFY_SUCCESS(TAG, (NULL == cred->credUsage), ERROR);
+#endif
+    return true;
+exit:
+    return false;
+}
+
+/**
  * This function frees OicSecCred_t object's fields and object itself.
  */
 static void FreeCred(OicSecCred_t *cred)
@@ -113,11 +251,17 @@ static void FreeCred(OicSecCred_t *cred)
 #endif /* __WITH_DTLS__ ||  __WITH_TLS__*/
 
     //Clean PrivateData
+    OICClearMemory(cred->privateData.data, cred->privateData.len);
     OICFree(cred->privateData.data);
 
     //Clean Period
     OICFree(cred->period);
 
+#ifdef MULTIPLE_OWNER
+    //Clean eowner
+    OICFree(cred->eownerID);
+#endif
+
     //Clean Cred node itself
     OICFree(cred);
 }
@@ -173,6 +317,261 @@ static size_t OicSecCredCount(const OicSecCred_t *secCred)
     return size;
 }
 
+static char* EncodingValueToString(OicEncodingType_t encoding)
+{
+    char* str = NULL;
+    switch (encoding)
+    {
+        case OIC_ENCODING_RAW:
+            str = (char*)OIC_SEC_ENCODING_RAW;
+            break;
+        case OIC_ENCODING_BASE64:
+            str = (char*)OIC_SEC_ENCODING_BASE64;
+            break;
+        case OIC_ENCODING_DER:
+            str = (char*)OIC_SEC_ENCODING_DER;
+            break;
+        case OIC_ENCODING_PEM:
+            str = (char*)OIC_SEC_ENCODING_PEM;
+            break;
+        default:
+            break;
+    }
+    return str;
+}
+
+static CborError SerializeEncodingToCborInternal(CborEncoder *map, const OicSecKey_t *value)
+{
+    CborError cborEncoderResult = CborNoError;
+    char *encoding = EncodingValueToString(value->encoding);
+    if (encoding)
+    {
+        cborEncoderResult = cbor_encode_text_string(map, OIC_JSON_ENCODING_NAME,
+            strlen(OIC_JSON_ENCODING_NAME));
+        VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Encoding Tag.");
+        cborEncoderResult = cbor_encode_text_string(map, encoding,
+            strlen(encoding));
+        VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Encoding Value.");
+
+        cborEncoderResult = cbor_encode_text_string(map, OIC_JSON_DATA_NAME,
+            strlen(OIC_JSON_DATA_NAME));
+        VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Name Tag.");
+        if (OIC_ENCODING_DER == value->encoding ||
+            OIC_ENCODING_RAW == value->encoding)
+        {
+            cborEncoderResult = cbor_encode_byte_string(map,
+                    value->data, value->len);
+        }
+        else
+        {
+            cborEncoderResult = cbor_encode_text_string(map,
+                    (char*)value->data, value->len);
+        }
+        VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Name Value.");
+    }
+    else
+    {
+        OIC_LOG(ERROR, TAG, "Unknown encoding type.");
+        VERIFY_CBOR_SUCCESS(TAG, CborErrorUnknownType, "Failed Adding Encoding Value.");
+    }
+    exit:
+    return cborEncoderResult;
+}
+
+static CborError SerializeEncodingToCbor(CborEncoder *rootMap, const char* tag, const OicSecKey_t *value)
+{
+    CborError cborEncoderResult = CborNoError;
+    CborEncoder map;
+    const size_t mapSize = 2;
+
+    cborEncoderResult = cbor_encode_text_string(rootMap, tag, strlen(tag));
+    VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding PrivateData Tag.");
+
+    cborEncoderResult = cbor_encoder_create_map(rootMap, &map, mapSize);
+    VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Map");
+
+    VERIFY_CBOR_SUCCESS(TAG, SerializeEncodingToCborInternal(&map, value),
+                        "Failed adding OicSecKey_t structure");
+
+    cborEncoderResult = cbor_encoder_close_container(rootMap, &map);
+    VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Closing Map.");
+
+    exit:
+    return cborEncoderResult;
+}
+
+static CborError SerializeSecOptToCbor(CborEncoder *rootMap, const char* tag, const OicSecOpt_t *value)
+{
+    CborError cborEncoderResult = CborNoError;
+    CborEncoder map;
+    const size_t mapSize = 3;
+
+    cborEncoderResult = cbor_encode_text_string(rootMap, tag, strlen(tag));
+    VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding PrivateData Tag.");
+
+    cborEncoderResult = cbor_encoder_create_map(rootMap, &map, mapSize);
+    VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Map");
+
+    OicSecKey_t in;
+    in.data = value->data;
+    in.encoding = value->encoding;
+    in.len = value->len;
+
+    VERIFY_CBOR_SUCCESS(TAG, SerializeEncodingToCborInternal(&map, &in),
+                        "Failed adding OicSecKey_t structure");
+
+    cborEncoderResult = cbor_encode_text_string(&map, OIC_JSON_REVOCATION_STATUS_NAME,
+        strlen(OIC_JSON_REVOCATION_STATUS_NAME));
+    VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional revstat Tag.");
+    cborEncoderResult = cbor_encode_boolean(&map, value->revstat);
+    VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional revstat Value.");
+
+    cborEncoderResult = cbor_encoder_close_container(rootMap, &map);
+    VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Closing Map.");
+
+    exit:
+    return cborEncoderResult;
+}
+
+static CborError DeserializeEncodingFromCborInternal(CborValue *map, char *name, OicSecKey_t *value)
+{
+    size_t len = 0;
+    CborError cborFindResult = CborNoError;
+
+    // data -- Mandatory
+    if (strcmp(name, OIC_JSON_DATA_NAME) == 0)
+    {
+        if(cbor_value_is_byte_string(map))
+        {
+            cborFindResult = cbor_value_dup_byte_string(map, &value->data,
+                &value->len, NULL);
+        }
+        else if(cbor_value_is_text_string(map))
+        {
+            cborFindResult = cbor_value_dup_text_string(map, (char**)(&value->data),
+                &value->len, NULL);
+        }
+        else
+        {
+            cborFindResult = CborErrorUnknownType;
+            OIC_LOG(ERROR, TAG, "Unknown type for private data.");
+        }
+        VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Finding PrivateData.");
+    }
+
+    // encoding -- Mandatory
+    if (strcmp(name, OIC_JSON_ENCODING_NAME) == 0)
+    {
+        char* strEncoding = NULL;
+        cborFindResult = cbor_value_dup_text_string(map, &strEncoding, &len, NULL);
+        VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Finding EncodingType");
+
+        if(strcmp(strEncoding, OIC_SEC_ENCODING_RAW) == 0)
+        {
+            value->encoding = OIC_ENCODING_RAW;
+        }
+        else if(strcmp(strEncoding, OIC_SEC_ENCODING_BASE64) == 0)
+        {
+            value->encoding = OIC_ENCODING_BASE64;
+        }
+        else if(strcmp(strEncoding, OIC_SEC_ENCODING_DER) == 0)
+        {
+            value->encoding = OIC_ENCODING_DER;
+        }
+        else if(strcmp(strEncoding, OIC_SEC_ENCODING_PEM) == 0)
+        {
+            value->encoding = OIC_ENCODING_PEM;
+        }
+        else
+        {
+            //For unit test
+            value->encoding = OIC_ENCODING_RAW;
+            OIC_LOG(WARNING, TAG, "Unknown encoding type detected.");
+        }
+        OICFree(strEncoding);
+    }
+    exit:
+    return cborFindResult;
+}
+
+static CborError DeserializeEncodingFromCbor(CborValue *rootMap, OicSecKey_t *value)
+{
+    CborValue map = { .parser = NULL };
+    CborError cborFindResult = cbor_value_enter_container(rootMap, &map);
+    size_t len = 0;
+
+    while (cbor_value_is_valid(&map))
+    {
+        char* name = NULL;
+        CborType type = cbor_value_get_type(&map);
+        if (type == CborTextStringType && cbor_value_is_text_string(&map))
+        {
+            cborFindResult = cbor_value_dup_text_string(&map, &name, &len, NULL);
+            VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to get text");
+            cborFindResult = cbor_value_advance(&map);
+            VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to advance value");
+        }
+        if (name)
+        {
+            VERIFY_CBOR_SUCCESS(TAG, DeserializeEncodingFromCborInternal(&map, name, value),
+                                "Failed to read OicSecKey_t value");
+        }
+        if (cbor_value_is_valid(&map))
+        {
+            cborFindResult = cbor_value_advance(&map);
+            VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Advancing Map.");
+        }
+        OICFree(name);
+    }
+    exit:
+    return cborFindResult;
+}
+
+static CborError DeserializeSecOptFromCbor(CborValue *rootMap, OicSecOpt_t *value)
+{
+    CborValue map = { .parser = NULL };
+    CborError cborFindResult = cbor_value_enter_container(rootMap, &map);
+    size_t len = 0;
+    value->revstat = false;
+
+    while (cbor_value_is_valid(&map))
+    {
+        char* name = NULL;
+        CborType type = cbor_value_get_type(&map);
+        if (type == CborTextStringType && cbor_value_is_text_string(&map))
+        {
+            cborFindResult = cbor_value_dup_text_string(&map, &name, &len, NULL);
+            VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to get text");
+            cborFindResult = cbor_value_advance(&map);
+            VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to advance value");
+        }
+        if (name)
+        {
+            // OptionalData::revstat -- Mandatory
+            if (strcmp(name, OIC_JSON_REVOCATION_STATUS_NAME) == 0)
+            {
+                cborFindResult = cbor_value_get_boolean(&map, &value->revstat);
+                VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Finding revstat Value.")
+            }
+            OicSecKey_t out;
+            VERIFY_CBOR_SUCCESS(TAG, DeserializeEncodingFromCborInternal(&map, name, &out),
+                                "Failed to read OicSecKey_t value");
+
+            value->data = out.data;
+            value->encoding = out.encoding;
+            value->len = out.len;
+        }
+        if (cbor_value_is_valid(&map))
+        {
+            cborFindResult = cbor_value_advance(&map);
+            VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Advancing Map.");
+        }
+        OICFree(name);
+    }
+    exit:
+    return cborFindResult;
+}
+
 OCStackResult CredToCBORPayload(const OicSecCred_t *credS, uint8_t **cborPayload,
                                 size_t *cborSize, int secureFlag)
 {
@@ -224,7 +623,15 @@ OCStackResult CredToCBORPayload(const OicSecCred_t *credS, uint8_t **cborPayload
         {
             mapSize++;
         }
+
 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
+#ifdef MULTIPLE_OWNER
+        if(cred->eownerID)
+        {
+            mapSize++;
+        }
+#endif //MULTIPLE_OWNER
+
         if (SIGNED_ASYMMETRIC_KEY == cred->credType && cred->publicData.data)
         {
             mapSize++;
@@ -256,7 +663,7 @@ OCStackResult CredToCBORPayload(const OicSecCred_t *credS, uint8_t **cborPayload
         cborEncoderResult = cbor_encode_text_string(&credMap, OIC_JSON_SUBJECTID_NAME,
             strlen(OIC_JSON_SUBJECTID_NAME));
         VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Subject Tag.");
-        inLen = (memcmp(&(cred->subject), &WILDCARD_SUBJECT_ID, WILDCARD_SUBJECT_ID_LEN) == 0) ?
+        inLen = (memcmp(&(cred->subject), &WILDCARD_SUBJECT_ID, sizeof(OicUuid_t)) == 0) ?
             WILDCARD_SUBJECT_ID_LEN : sizeof(OicUuid_t);
         if(inLen == WILDCARD_SUBJECT_ID_LEN)
         {
@@ -285,120 +692,16 @@ OCStackResult CredToCBORPayload(const OicSecCred_t *credS, uint8_t **cborPayload
         //PublicData -- Not Mandatory
         if (SIGNED_ASYMMETRIC_KEY == cred->credType && cred->publicData.data)
         {
-            CborEncoder publicMap;
-            const size_t publicMapSize = 2;
-
-            cborEncoderResult = cbor_encode_text_string(&credMap, OIC_JSON_PUBLICDATA_NAME,
-                strlen(OIC_JSON_PUBLICDATA_NAME));
+            cborEncoderResult = SerializeEncodingToCbor(&credMap,
+                                         OIC_JSON_PUBLICDATA_NAME, &cred->publicData);
             VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding PublicData Tag.");
-
-            cborEncoderResult = cbor_encoder_create_map(&credMap, &publicMap, publicMapSize);
-            VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding PublicData Map");
-
-            cborEncoderResult = cbor_encode_text_string(&publicMap, OIC_JSON_DATA_NAME,
-                strlen(OIC_JSON_DATA_NAME));
-            VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Pub Data Tag.");
-            cborEncoderResult = cbor_encode_byte_string(&publicMap, cred->publicData.data,
-                cred->publicData.len);
-            VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Pub Value.");
-
-            // TODO: Need to data strucure modification for OicSecCert_t.
-            cborEncoderResult = cbor_encode_text_string(&publicMap, OIC_JSON_ENCODING_NAME,
-                strlen(OIC_JSON_ENCODING_NAME));
-            VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Public Encoding Tag.");
-            cborEncoderResult = cbor_encode_text_string(&publicMap, OIC_SEC_ENCODING_DER,
-                strlen(OIC_SEC_ENCODING_DER));
-            VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Public Encoding Value.");
-
-            cborEncoderResult = cbor_encoder_close_container(&credMap, &publicMap);
-            VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Closing PublicData Map.");
         }
         //OptionalData -- Not Mandatory
         if (SIGNED_ASYMMETRIC_KEY == cred->credType && cred->optionalData.data)
         {
-            CborEncoder optionalMap;
-            const size_t optionalMapSize = 2;
-
-            cborEncoderResult = cbor_encode_text_string(&credMap, OIC_JSON_OPTDATA_NAME,
-                strlen(OIC_JSON_OPTDATA_NAME));
+            cborEncoderResult = SerializeSecOptToCbor(&credMap,
+                                         OIC_JSON_OPTDATA_NAME, &cred->optionalData);
             VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding OptionalData Tag.");
-
-            cborEncoderResult = cbor_encoder_create_map(&credMap, &optionalMap, optionalMapSize);
-            VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding OptionalData Map");
-
-            // TODO: Need to data strucure modification for OicSecCert_t.
-            if(OIC_ENCODING_RAW == cred->optionalData.encoding)
-            {
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, OIC_JSON_ENCODING_NAME,
-                    strlen(OIC_JSON_ENCODING_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Encoding Tag.");
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, OIC_SEC_ENCODING_RAW,
-                    strlen(OIC_SEC_ENCODING_RAW));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Encoding Value.");
-
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, OIC_JSON_DATA_NAME,
-                    strlen(OIC_JSON_DATA_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Tag.");
-                cborEncoderResult = cbor_encode_byte_string(&optionalMap, cred->optionalData.data,
-                    cred->optionalData.len);
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Value.");
-            }
-            else if(OIC_ENCODING_BASE64 == cred->optionalData.encoding)
-            {
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, OIC_JSON_ENCODING_NAME,
-                    strlen(OIC_JSON_ENCODING_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Encoding Tag.");
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, OIC_SEC_ENCODING_BASE64,
-                    strlen(OIC_SEC_ENCODING_BASE64));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Encoding Value.");
-
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, OIC_JSON_DATA_NAME,
-                    strlen(OIC_JSON_DATA_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Tag.");
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, (char*)(cred->optionalData.data),
-                    cred->optionalData.len);
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Value.");
-            }
-            else if(OIC_ENCODING_PEM == cred->optionalData.encoding)
-            {
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, OIC_JSON_ENCODING_NAME,
-                    strlen(OIC_JSON_ENCODING_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Encoding Tag.");
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, OIC_SEC_ENCODING_PEM,
-                    strlen(OIC_SEC_ENCODING_PEM));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Encoding Value.");
-
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, OIC_JSON_DATA_NAME,
-                    strlen(OIC_JSON_DATA_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Tag.");
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, (char*)(cred->optionalData.data),
-                    cred->optionalData.len);
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Value.");
-            }
-            else if(OIC_ENCODING_DER == cred->optionalData.encoding)
-            {
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, OIC_JSON_ENCODING_NAME,
-                    strlen(OIC_JSON_ENCODING_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Encoding Tag.");
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, OIC_SEC_ENCODING_DER,
-                    strlen(OIC_SEC_ENCODING_DER));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Encoding Value.");
-
-                cborEncoderResult = cbor_encode_text_string(&optionalMap, OIC_JSON_DATA_NAME,
-                    strlen(OIC_JSON_DATA_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Tag.");
-                cborEncoderResult = cbor_encode_byte_string(&optionalMap, cred->optionalData.data,
-                    cred->optionalData.len);
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding optional Value.");
-            }
-            else
-            {
-                OIC_LOG(ERROR, TAG, "Unknow encoding type for optional data.");
-                VERIFY_CBOR_SUCCESS(TAG, CborErrorUnknownType, "Failed Adding optional Encoding Value.");
-            }
-
-            cborEncoderResult = cbor_encoder_close_container(&credMap, &optionalMap);
-            VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Closing OptionalData Map.");
         }
         //CredUsage -- Not Mandatory
         if(cred->credUsage)
@@ -414,74 +717,9 @@ OCStackResult CredToCBORPayload(const OicSecCred_t *credS, uint8_t **cborPayload
         //PrivateData -- Not Mandatory
         if(!secureFlag && cred->privateData.data)
         {
-            CborEncoder privateMap;
-            const size_t privateMapSize = 2;
-
-            cborEncoderResult = cbor_encode_text_string(&credMap, OIC_JSON_PRIVATEDATA_NAME,
-                strlen(OIC_JSON_PRIVATEDATA_NAME));
+            cborEncoderResult = SerializeEncodingToCbor(&credMap,
+                                         OIC_JSON_PRIVATEDATA_NAME, &cred->privateData);
             VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding PrivateData Tag.");
-
-            cborEncoderResult = cbor_encoder_create_map(&credMap, &privateMap, privateMapSize);
-            VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding PrivateData Map");
-
-            // TODO: Need to data strucure modification for OicSecKey_t.
-            // TODO: Added as workaround, will be replaced soon.
-            if(OIC_ENCODING_RAW == cred->privateData.encoding)
-            {
-                cborEncoderResult = cbor_encode_text_string(&privateMap, OIC_JSON_ENCODING_NAME,
-                    strlen(OIC_JSON_ENCODING_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Private Encoding Tag.");
-                cborEncoderResult = cbor_encode_text_string(&privateMap, OIC_SEC_ENCODING_RAW,
-                    strlen(OIC_SEC_ENCODING_RAW));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Private Encoding Value.");
-
-                cborEncoderResult = cbor_encode_text_string(&privateMap, OIC_JSON_DATA_NAME,
-                    strlen(OIC_JSON_DATA_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Priv Tag.");
-                cborEncoderResult = cbor_encode_byte_string(&privateMap, cred->privateData.data,
-                    cred->privateData.len);
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Priv Value.");
-            }
-            else if(OIC_ENCODING_BASE64 == cred->privateData.encoding)
-            {
-                cborEncoderResult = cbor_encode_text_string(&privateMap, OIC_JSON_ENCODING_NAME,
-                    strlen(OIC_JSON_ENCODING_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Private Encoding Tag.");
-                cborEncoderResult = cbor_encode_text_string(&privateMap, OIC_SEC_ENCODING_BASE64,
-                    strlen(OIC_SEC_ENCODING_BASE64));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Private Encoding Value.");
-
-                cborEncoderResult = cbor_encode_text_string(&privateMap, OIC_JSON_DATA_NAME,
-                    strlen(OIC_JSON_DATA_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Priv Tag.");
-                cborEncoderResult = cbor_encode_text_string(&privateMap, (char*)(cred->privateData.data),
-                    cred->privateData.len);
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Priv Value.");
-            }
-            else if(OIC_ENCODING_DER == cred->privateData.encoding)
-            {
-                cborEncoderResult = cbor_encode_text_string(&privateMap, OIC_JSON_ENCODING_NAME,
-                    strlen(OIC_JSON_ENCODING_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Private Encoding Tag.");
-                cborEncoderResult = cbor_encode_text_string(&privateMap, OIC_SEC_ENCODING_DER,
-                    strlen(OIC_SEC_ENCODING_DER));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Private Encoding Value.");
-
-                cborEncoderResult = cbor_encode_text_string(&privateMap, OIC_JSON_DATA_NAME,
-                    strlen(OIC_JSON_DATA_NAME));
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Priv Tag.");
-                cborEncoderResult = cbor_encode_byte_string(&privateMap, cred->privateData.data,
-                    cred->privateData.len);
-                VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Priv Value.");
-            }
-            else
-            {
-                OIC_LOG(ERROR, TAG, "Unknow encoding type for private data.");
-                VERIFY_CBOR_SUCCESS(TAG, CborErrorUnknownType, "Failed Adding Private Encoding Value.");
-            }
-
-            cborEncoderResult = cbor_encoder_close_container(&credMap, &privateMap);
-            VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Closing PrivateData Map.");
         }
 
         //Period -- Not Mandatory
@@ -495,6 +733,21 @@ OCStackResult CredToCBORPayload(const OicSecCred_t *credS, uint8_t **cborPayload
             VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding Period Name Value.");
         }
 
+#ifdef MULTIPLE_OWNER
+        // Eownerid -- Not Mandatory
+        if(cred->eownerID)
+        {
+            char *eowner = NULL;
+            cborEncoderResult = cbor_encode_text_string(&credMap, OIC_JSON_EOWNERID_NAME,
+                strlen(OIC_JSON_EOWNERID_NAME));
+            VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Adding eownerId Name Tag.");
+            ret = ConvertUuidToStr(cred->eownerID, &eowner);
+            VERIFY_SUCCESS(TAG, ret == OC_STACK_OK, ERROR);
+            cborEncoderResult = cbor_encode_text_string(&credMap, eowner, strlen(eowner));
+            VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Addding eownerId Value.");
+            OICFree(eowner);
+        }
+#endif //MULTIPLE_OWNER
 
         cborEncoderResult = cbor_encoder_close_container(&credArray, &credMap);
         VERIFY_CBOR_SUCCESS(TAG, cborEncoderResult, "Failed Closing Cred Map.");
@@ -560,7 +813,7 @@ OCStackResult CredToCBORPayload(const OicSecCred_t *credS, uint8_t **cborPayload
     {
         OIC_LOG(DEBUG, TAG, "CredToCBORPayload Successed");
         *cborPayload = outPayload;
-        *cborSize = encoder.ptr - outPayload;
+        *cborSize = cbor_encoder_get_buffer_size(&encoder, outPayload);
         ret = OC_STACK_OK;
     }
     OIC_LOG(DEBUG, TAG, "CredToCBORPayload OUT");
@@ -571,7 +824,7 @@ exit:
         // reallocate and try again!
         OICFree(outPayload);
         // Since the allocated initial memory failed, double the memory.
-        cborLen += encoder.ptr - encoder.end;
+        cborLen += cbor_encoder_get_buffer_size(&encoder, encoder.end);
         cborEncoderResult = CborNoError;
         ret = CredToCBORPayload(credS, cborPayload, &cborLen, secureFlag);
         *cborSize = cborLen;
@@ -605,6 +858,7 @@ OCStackResult CBORPayloadToCred(const uint8_t *cborPayload, size_t size,
     cbor_parser_init(cborPayload, size, 0, &parser, &credCbor);
 
     OicSecCred_t *headCred = (OicSecCred_t *) OICCalloc(1, sizeof(OicSecCred_t));
+    VERIFY_NON_NULL(TAG, headCred, ERROR);
 
     // Enter CRED Root Map
     CborValue CredRootMap = { .parser = NULL, .ptr = NULL, .remaining = 0, .extra = 0, .type = 0, .flags = 0 };
@@ -650,6 +904,7 @@ OCStackResult CBORPayloadToCred(const uint8_t *cborPayload, size_t size,
                     else
                     {
                         cred = (OicSecCred_t *) OICCalloc(1, sizeof(OicSecCred_t));
+                        VERIFY_NON_NULL(TAG, cred, ERROR);
                         OicSecCred_t *temp = headCred;
                         while (temp->next)
                         {
@@ -658,8 +913,6 @@ OCStackResult CBORPayloadToCred(const uint8_t *cborPayload, size_t size,
                         temp->next = cred;
                     }
 
-                    VERIFY_NON_NULL(TAG, cred, ERROR);
-
                     while(cbor_value_is_valid(&credMap) && cbor_value_is_text_string(&credMap))
                     {
                         char* name = NULL;
@@ -701,210 +954,42 @@ OCStackResult CBORPayloadToCred(const uint8_t *cborPayload, size_t size,
                             // credtype
                             if (strcmp(name, OIC_JSON_CREDTYPE_NAME)  == 0)
                             {
+#ifdef __TIZENRT__
+                                cborFindResult = cbor_value_get_int(&credMap, (int *) &cred->credType);
+                                VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Finding CredType.");
+#else
                                 uint64_t credType = 0;
                                 cborFindResult = cbor_value_get_uint64(&credMap, &credType);
                                 VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Finding CredType.");
                                 cred->credType = (OicSecCredType_t)credType;
+#endif
                             }
                             // privatedata
                             if (strcmp(name, OIC_JSON_PRIVATEDATA_NAME)  == 0)
                             {
-                                CborValue privateMap = { .parser = NULL };
-                                cborFindResult = cbor_value_enter_container(&credMap, &privateMap);
+                                cborFindResult = DeserializeEncodingFromCbor(&credMap, &cred->privateData);
+                                VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to read privateData structure");
 
-                                while (cbor_value_is_valid(&privateMap))
+                                OicEncodingType_t encoding = cred->privateData.encoding;
+                                if (OIC_ENCODING_DER == encoding || OIC_ENCODING_PEM == encoding)
                                 {
-                                    char* privname = NULL;
-                                    CborType type = cbor_value_get_type(&privateMap);
-                                    if (type == CborTextStringType && cbor_value_is_text_string(&privateMap))
-                                    {
-                                        cborFindResult = cbor_value_dup_text_string(&privateMap, &privname,
-                                                &len, NULL);
-                                        VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to get text");
-                                        cborFindResult = cbor_value_advance(&privateMap);
-                                        VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to advance value");
-                                    }
-                                    if (privname)
-                                    {
-                                        // PrivateData::privdata -- Mandatory
-                                        if (strcmp(privname, OIC_JSON_DATA_NAME) == 0)
-                                        {
-                                            if(cbor_value_is_byte_string(&privateMap))
-                                            {
-                                                cborFindResult = cbor_value_dup_byte_string(&privateMap, &cred->privateData.data,
-                                                    &cred->privateData.len, NULL);
-                                            }
-                                            else if(cbor_value_is_text_string(&privateMap))
-                                            {
-                                                cborFindResult = cbor_value_dup_text_string(&privateMap, (char**)(&cred->privateData.data),
-                                                    &cred->privateData.len, NULL);
-                                            }
-                                            else
-                                            {
-                                                cborFindResult = CborErrorUnknownType;
-                                                OIC_LOG(ERROR, TAG, "Unknow type for private data.");
-                                            }
-                                            VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Finding PrivateData.");
-                                        }
-
-                                        // PrivateData::encoding -- Mandatory
-                                        if (strcmp(privname, OIC_JSON_ENCODING_NAME) == 0)
-                                        {
-                                            // TODO: Added as workaround. Will be replaced soon.
-                                            char* strEncoding = NULL;
-                                            cborFindResult = cbor_value_dup_text_string(&privateMap, &strEncoding, &len, NULL);
-                                            VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Finding EncodingType");
-
-                                            if(strcmp(strEncoding, OIC_SEC_ENCODING_RAW) == 0)
-                                            {
-                                                cred->privateData.encoding = OIC_ENCODING_RAW;
-                                            }
-                                            else if(strcmp(strEncoding, OIC_SEC_ENCODING_BASE64) == 0)
-                                            {
-                                                cred->privateData.encoding = OIC_ENCODING_BASE64;
-                                            }
-                                            else
-                                            {
-                                                //For unit test
-                                                cred->privateData.encoding = OIC_ENCODING_RAW;
-                                                OIC_LOG(WARNING, TAG, "Unknow encoding type dectected for private data.");
-                                            }
-
-                                            OICFree(strEncoding);
-                                        }
-                                    }
-                                    if (cbor_value_is_valid(&privateMap))
-                                    {
-                                        cborFindResult = cbor_value_advance(&privateMap);
-                                        VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Advancing privatedata Map.");
-                                    }
-                                    OICFree(privname);
+                                    //For unit test
+                                    cred->privateData.encoding = OIC_ENCODING_RAW;
+                                    OIC_LOG(WARNING, TAG, "Unknown encoding type detected for private data.");
                                 }
-
                             }
 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
                             //PublicData -- Not Mandatory
                             if (strcmp(name, OIC_JSON_PUBLICDATA_NAME)  == 0)
                             {
-                                CborValue pubMap = { .parser = NULL };
-                                cborFindResult = cbor_value_enter_container(&credMap, &pubMap);
-
-                                while (cbor_value_is_valid(&pubMap))
-                                {
-                                    char* pubname = NULL;
-                                    CborType type = cbor_value_get_type(&pubMap);
-                                    if (type == CborTextStringType && cbor_value_is_text_string(&pubMap))
-                                    {
-                                        cborFindResult = cbor_value_dup_text_string(&pubMap, &pubname,
-                                                &len, NULL);
-                                        VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to get text");
-                                        cborFindResult = cbor_value_advance(&pubMap);
-                                        VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to advance value");
-                                    }
-                                    if (pubname)
-                                    {
-                                        // PrivateData::privdata -- Mandatory
-                                        if (strcmp(pubname, OIC_JSON_DATA_NAME) == 0 && cbor_value_is_byte_string(&pubMap))
-                                        {
-                                            cborFindResult = cbor_value_dup_byte_string(&pubMap, &cred->publicData.data,
-                                                &cred->publicData.len, NULL);
-                                            VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Finding PubData.");
-                                        }
-                                        // PublicData::encoding -- Mandatory
-                                        if (strcmp(pubname, OIC_JSON_ENCODING_NAME) == 0)
-                                        {
-                                            // TODO: Need to update data structure, just ignore encoding value now.
-                                        }
-                                    }
-                                    if (cbor_value_is_valid(&pubMap))
-                                    {
-                                        cborFindResult = cbor_value_advance(&pubMap);
-                                        VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Advancing publicdata Map.");
-                                    }
-                                    OICFree(pubname);
-                                }
+                                cborFindResult = DeserializeEncodingFromCbor(&credMap, &cred->publicData);
+                                VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to read publicData structure");
                             }
                             //OptionalData -- Not Mandatory
                             if (strcmp(name, OIC_JSON_OPTDATA_NAME)  == 0)
                             {
-                                CborValue optMap = { .parser = NULL };
-                                cborFindResult = cbor_value_enter_container(&credMap, &optMap);
-
-                                while (cbor_value_is_valid(&optMap))
-                                {
-                                    char* optname = NULL;
-                                    CborType type = cbor_value_get_type(&optMap);
-                                    if (type == CborTextStringType && cbor_value_is_text_string(&optMap))
-                                    {
-                                        cborFindResult = cbor_value_dup_text_string(&optMap, &optname,
-                                                &len, NULL);
-                                        VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to get text");
-                                        cborFindResult = cbor_value_advance(&optMap);
-                                        VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to advance value");
-                                    }
-                                    if (optname)
-                                    {
-                                        // OptionalData::optdata -- Mandatory
-                                        if (strcmp(optname, OIC_JSON_DATA_NAME) == 0)
-                                        {
-                                            if(cbor_value_is_byte_string(&optMap))
-                                            {
-                                                cborFindResult = cbor_value_dup_byte_string(&optMap, &cred->optionalData.data,
-                                                    &cred->optionalData.len, NULL);
-                                            }
-                                            else if(cbor_value_is_text_string(&optMap))
-                                            {
-                                                cborFindResult = cbor_value_dup_text_string(&optMap, (char**)(&cred->optionalData.data),
-                                                    &cred->optionalData.len, NULL);
-                                            }
-                                            else
-                                            {
-                                                cborFindResult = CborErrorUnknownType;
-                                                OIC_LOG(ERROR, TAG, "Unknow type for optional data.");
-                                            }
-                                            VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Finding OptionalData.");
-                                        }
-                                        // OptionalData::encoding -- Mandatory
-                                        if (strcmp(optname, OIC_JSON_ENCODING_NAME) == 0)
-                                        {
-                                            // TODO: Added as workaround. Will be replaced soon.
-                                            char* strEncoding = NULL;
-                                            cborFindResult = cbor_value_dup_text_string(&optMap, &strEncoding, &len, NULL);
-                                            VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Finding EncodingType");
-
-                                            if(strcmp(strEncoding, OIC_SEC_ENCODING_RAW) == 0)
-                                            {
-                                                OIC_LOG(INFO,TAG,"cbor_value_is_byte_string");
-                                                cred->optionalData.encoding = OIC_ENCODING_RAW;
-                                            }
-                                            else if(strcmp(strEncoding, OIC_SEC_ENCODING_BASE64) == 0)
-                                            {
-                                                cred->optionalData.encoding = OIC_ENCODING_BASE64;
-                                            }
-                                            else if(strcmp(strEncoding, OIC_SEC_ENCODING_PEM) == 0)
-                                            {
-                                                cred->optionalData.encoding = OIC_ENCODING_PEM;
-                                            }
-                                            else if(strcmp(strEncoding, OIC_SEC_ENCODING_DER) == 0)
-                                            {
-                                                cred->optionalData.encoding = OIC_ENCODING_DER;
-                                            }
-                                            else
-                                            {
-                                                //For unit test
-                                                cred->optionalData.encoding = OIC_ENCODING_RAW;
-                                                OIC_LOG(WARNING, TAG, "Unknow encoding type dectected for optional data.");
-                                            }
-                                            OICFree(strEncoding);
-                                        }
-                                    }
-                                    if (cbor_value_is_valid(&optMap))
-                                    {
-                                        cborFindResult = cbor_value_advance(&optMap);
-                                        VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Advancing optdata Map.");
-                                    }
-                                    OICFree(optname);
-                                }
+                                cborFindResult = DeserializeSecOptFromCbor(&credMap, &cred->optionalData);
+                                VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed to read optionalData structure");
                             }
                             //Credusage -- Not Mandatory
                             if (0 == strcmp(OIC_JSON_CREDUSAGE_NAME, name))
@@ -920,6 +1005,24 @@ OCStackResult CBORPayloadToCred(const uint8_t *cborPayload, size_t size,
                                 VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Finding Period.");
                             }
 
+#ifdef MULTIPLE_OWNER
+                            // Eowner uuid -- Not Mandatory
+                            if (strcmp(OIC_JSON_EOWNERID_NAME, name)  == 0 && cbor_value_is_text_string(&credMap))
+                            {
+                                char *eowner = NULL;
+                                cborFindResult = cbor_value_dup_text_string(&credMap, &eowner, &len, NULL);
+                                VERIFY_CBOR_SUCCESS(TAG, cborFindResult, "Failed Finding eownerId Value.");
+                                if(NULL == cred->eownerID)
+                                {
+                                    cred->eownerID = (OicUuid_t*)OICCalloc(1, sizeof(OicUuid_t));
+                                    VERIFY_NON_NULL(TAG, cred->eownerID, ERROR);
+                                }
+                                ret = ConvertStrToUuid(eowner, cred->eownerID);
+                                OICFree(eowner);
+                                VERIFY_SUCCESS(TAG, OC_STACK_OK == ret , ERROR);
+                            }
+#endif //MULTIPLE_OWNER
+
                             if (cbor_value_is_valid(&credMap))
                             {
                                 cborFindResult = cbor_value_advance(&credMap);
@@ -976,10 +1079,38 @@ exit:
     return ret;
 }
 
+#ifdef MULTIPLE_OWNER
+bool IsValidCredentialAccessForSubOwner(const OicUuid_t* uuid, const uint8_t *cborPayload, size_t size)
+{
+    OicSecCred_t* cred = NULL;
+    bool isValidCred = false;
+
+    OIC_LOG_BUFFER(DEBUG, TAG, cborPayload, size);
+
+    VERIFY_NON_NULL(TAG, uuid, ERROR);
+    VERIFY_NON_NULL(TAG, cborPayload, ERROR);
+    VERIFY_SUCCESS(TAG, 0 != size, ERROR);
+    VERIFY_SUCCESS(TAG, OC_STACK_OK == CBORPayloadToCred(cborPayload, size, &cred), ERROR);
+    VERIFY_NON_NULL(TAG, cred, ERROR);
+    VERIFY_NON_NULL(TAG, cred->eownerID, ERROR);
+    VERIFY_SUCCESS(TAG, (memcmp(cred->eownerID->id, uuid->id, sizeof(uuid->id)) == 0), ERROR);
+
+    isValidCred = true;
+
+exit:
+    DeleteCredList(cred);
+
+    return isValidCred;
+
+}
+#endif //MULTIPLE_OWNER
+
 OicSecCred_t * GenerateCredential(const OicUuid_t * subject, OicSecCredType_t credType,
-                                  const OicSecCert_t * publicData, const OicSecKey_t* privateData,
-                                  const OicUuid_t * rownerID)
+                                  const OicSecKey_t * publicData, const OicSecKey_t* privateData,
+                                  const OicUuid_t * rownerID, const OicUuid_t * eownerID)
 {
+    OIC_LOG(DEBUG, TAG, "IN GenerateCredential");
+
     (void)publicData;
     OCStackResult ret = OC_STACK_ERROR;
 
@@ -1013,54 +1144,77 @@ OicSecCred_t * GenerateCredential(const OicUuid_t * subject, OicSecCredType_t cr
         VERIFY_NON_NULL(TAG, cred->privateData.data, ERROR);
         memcpy(cred->privateData.data, privateData->data, privateData->len);
         cred->privateData.len = privateData->len;
-
-        // TODO: Added as workaround. Will be replaced soon.
         cred->privateData.encoding = OIC_ENCODING_RAW;
+    }
 
-#if 0
-        // NOTE: Test codes to use base64 for credential.
-        uint32_t outSize = 0;
-        size_t b64BufSize = B64ENCODE_OUT_SAFESIZE((privateData->len + 1));
-        char* b64Buf = (uint8_t *)OICCalloc(1, b64BufSize);
-        VERIFY_NON_NULL(TAG, b64Buf, ERROR);
-        b64Encode(privateData->data, privateData->len, b64Buf, b64BufSize, &outSize);
+    VERIFY_NON_NULL(TAG, rownerID, ERROR);
+    memcpy(&cred->rownerID, rownerID, sizeof(OicUuid_t));
 
-        OICFree( cred->privateData.data );
-        cred->privateData.data = (uint8_t *)OICCalloc(1, outSize + 1);
-        VERIFY_NON_NULL(TAG, cred->privateData.data, ERROR);
+#ifdef MULTIPLE_OWNER
+    if(eownerID)
+    {
+        cred->eownerID = (OicUuid_t*)OICCalloc(1, sizeof(OicUuid_t));
+        VERIFY_NON_NULL(TAG, cred->eownerID, ERROR);
+        memcpy(cred->eownerID->id, eownerID->id, sizeof(eownerID->id));
+    }
+#else
+    (void)(eownerID);
+#endif //MULTIPLE_OWNER_
 
-        strcpy(cred->privateData.data, b64Buf);
-        cred->privateData.encoding = OIC_ENCODING_BASE64;
-        cred->privateData.len = outSize;
-        OICFree(b64Buf);
-#endif //End of Test codes
+    ret = OC_STACK_OK;
 
+    OIC_LOG_V(DEBUG, TAG, "GenerateCredential : result: %d", ret);
+    OIC_LOG_V(DEBUG, TAG, "GenerateCredential : credId: %d", cred->credId);
+    OIC_LOG_V(DEBUG, TAG, "GenerateCredential : credType: %d", cred->credType);
+    OIC_LOG_BUFFER(DEBUG, TAG, cred->subject.id, sizeof(cred->subject.id));
+    if (cred->privateData.data)
+    {
+        OIC_LOG_V(DEBUG, TAG, "GenerateCredential : privateData len: %zd", cred->privateData.len);
+        OIC_LOG_BUFFER(DEBUG, TAG, cred->privateData.data, cred->privateData.len);
     }
+#if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
+    if(cred->credUsage)
+    {
+        OIC_LOG_V(DEBUG, TAG, "GenerateCredential : credUsage: %s", cred->credUsage);
+    }
+    if (cred->publicData.data)
+    {
+        OIC_LOG_V(DEBUG, TAG, "GenerateCredential : publicData len: %zd", cred->publicData.len);
+        OIC_LOG_BUFFER(DEBUG, TAG, cred->publicData.data, cred->publicData.len);
 
-    VERIFY_NON_NULL(TAG, rownerID, ERROR);
-    memcpy(&cred->rownerID, rownerID, sizeof(OicUuid_t));
+    }
+    if (cred->optionalData.data)
+    {
+        OIC_LOG_V(DEBUG, TAG, "GenerateCredential : optionalData len: %zd", cred->optionalData.len);
+        OIC_LOG_BUFFER(DEBUG, TAG, cred->optionalData.data, cred->optionalData.len);
+        OIC_LOG_V(DEBUG, TAG, "GenerateCredential : optionalData revstat: %d", cred->optionalData.revstat);
+    }
+#endif //defined(__WITH_DTLS__) || defined(__WITH_TLS__)
 
-    ret = OC_STACK_OK;
 exit:
     if (OC_STACK_OK != ret)
     {
         DeleteCredList(cred);
         cred = NULL;
     }
+    OIC_LOG(DEBUG, TAG, "OUT GenerateCredential");
     return cred;
 }
 
 static bool UpdatePersistentStorage(const OicSecCred_t *cred)
 {
     bool ret = false;
+    OIC_LOG(DEBUG, TAG, "IN Cred UpdatePersistentStorage");
 
     // Convert Cred data into JSON for update to persistent storage
     if (cred)
     {
         uint8_t *payload = NULL;
-        // This added '256' is arbitrary value that is added to cover the name of the resource, map addition and ending
+        // This added '512' is arbitrary value that is added to cover the name of the resource, map addition and ending
         size_t size = GetCredKeyDataSize(cred);
-        size += (256 * OicSecCredCount(cred));
+        size += (512 * OicSecCredCount(cred));
+        OIC_LOG_V(INFO, TAG, "target cred size: %zu - temporal size to make room for encoding", size);
+
         int secureFlag = 0;
         OCStackResult res = CredToCBORPayload(cred, &payload, &size, secureFlag);
         if ((OC_STACK_OK == res) && payload)
@@ -1069,6 +1223,7 @@ static bool UpdatePersistentStorage(const OicSecCred_t *cred)
             {
                 ret = true;
             }
+            OICClearMemory(payload, size);
             OICFree(payload);
         }
     }
@@ -1079,6 +1234,7 @@ static bool UpdatePersistentStorage(const OicSecCred_t *cred)
             ret = true;
         }
     }
+    OIC_LOG(DEBUG, TAG, "OUT Cred UpdatePersistentStorage");
     return ret;
 }
 
@@ -1152,7 +1308,7 @@ static OicSecCred_t* GetCredDefault()
     return NULL;
 }
 
-static bool IsSameSecKey(const OicSecKey_t* sk1, const OicSecKey_t* sk2)
+static bool IsSameSecOpt(const OicSecOpt_t* sk1, const OicSecOpt_t* sk2)
 {
     VERIFY_NON_NULL(TAG, sk1, WARNING);
     VERIFY_NON_NULL(TAG, sk2, WARNING);
@@ -1165,19 +1321,18 @@ exit:
     return false;
 }
 
-#if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
-static bool IsSameCert(const OicSecCert_t* cert1, const OicSecCert_t* cert2)
+static bool IsSameSecKey(const OicSecKey_t* sk1, const OicSecKey_t* sk2)
 {
-    VERIFY_NON_NULL(TAG, cert1, WARNING);
-    VERIFY_NON_NULL(TAG, cert2, WARNING);
+    VERIFY_NON_NULL(TAG, sk1, WARNING);
+    VERIFY_NON_NULL(TAG, sk2, WARNING);
 
-    VERIFY_SUCCESS(TAG, (cert1->len == cert2->len), INFO);
-    VERIFY_SUCCESS(TAG, (0 == memcmp(cert1->data, cert2->data, cert1->len)), INFO);
+    VERIFY_SUCCESS(TAG, (sk1->len == sk2->len), INFO);
+    VERIFY_SUCCESS(TAG, (sk1->encoding == sk2->encoding), INFO);
+    VERIFY_SUCCESS(TAG, (0 == memcmp(sk1->data, sk2->data, sk1->len)), INFO);
     return true;
 exit:
     return false;
 }
-#endif //#if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
 
 /**
  * Compares credential
@@ -1220,13 +1375,13 @@ static CredCompareResult_t CompareCredential(const OicSecCred_t * l, const OicSe
         {
             if(l->publicData.data && r->publicData.data)
             {
-                VERIFY_SUCCESS(TAG, IsSameCert(&l->publicData, &r->publicData), INFO);
+                VERIFY_SUCCESS(TAG, IsSameSecKey(&l->publicData, &r->publicData), INFO);
                 isCompared = true;
             }
 
             if(l->optionalData.data && r->optionalData.data)
             {
-                VERIFY_SUCCESS(TAG, IsSameSecKey(&l->optionalData, &r->optionalData), INFO);
+                VERIFY_SUCCESS(TAG, IsSameSecOpt(&l->optionalData, &r->optionalData), INFO);
                 isCompared = true;
             }
 
@@ -1248,13 +1403,13 @@ static CredCompareResult_t CompareCredential(const OicSecCred_t * l, const OicSe
 
             if(l->publicData.data && r->publicData.data)
             {
-                VERIFY_SUCCESS(TAG, IsSameCert(&l->publicData, &r->publicData), INFO);
+                VERIFY_SUCCESS(TAG, IsSameSecKey(&l->publicData, &r->publicData), INFO);
                 isCompared = true;
             }
 
             if(l->optionalData.data && r->optionalData.data)
             {
-                VERIFY_SUCCESS(TAG, IsSameSecKey(&l->optionalData, &r->optionalData), INFO);
+                VERIFY_SUCCESS(TAG, IsSameSecOpt(&l->optionalData, &r->optionalData), INFO);
                 isCompared = true;
             }
 
@@ -1263,8 +1418,9 @@ static CredCompareResult_t CompareCredential(const OicSecCred_t * l, const OicSe
 #endif //__WITH_DTLS__ or __WITH_TLS__
         default:
         {
+            OIC_LOG_V(ERROR, TAG, "Invalid CredType(%d)", l->credType);
             cmpResult = CRED_CMP_ERROR;
-            break;
+            goto exit;
         }
     }
 
@@ -1289,47 +1445,84 @@ OCStackResult AddCredential(OicSecCred_t * newCred)
     OCStackResult ret = OC_STACK_ERROR;
     OicSecCred_t * temp = NULL;
     bool validFlag = true;
-    VERIFY_SUCCESS(TAG, NULL != newCred, ERROR);
+    OicUuid_t emptyOwner = { .id = {0} };
 
+    OIC_LOG(DEBUG, TAG, "IN AddCredential");
+
+    VERIFY_SUCCESS(TAG, NULL != newCred, ERROR);
     //Assigning credId to the newCred
     newCred->credId = GetCredId();
-    VERIFY_SUCCESS(TAG, newCred->credId != 0, ERROR);
+    VERIFY_SUCCESS(TAG, true == IsValidCredential(newCred), ERROR);
 
-    LL_FOREACH(gCred, temp)
+    //the newCred is not valid if it is empty
+
+    if (memcmp(&(newCred->subject), &emptyOwner, sizeof(OicUuid_t)) == 0)
+    {
+        validFlag = false;
+    }
+    else
     {
-        CredCompareResult_t cmpRes = CompareCredential(temp, newCred);
-        if(CRED_CMP_EQUAL == cmpRes)
+        OicSecCred_t *prev = NULL;
+        LL_FOREACH(gCred, temp)
         {
-            OIC_LOG_V(WARNING, TAG, "Detected same credential ID(%d)" \
-                      "new credential's ID will be replaced.", temp->credId);
-            newCred->credId = temp->credId;
-            ret = OC_STACK_OK;
-            validFlag = false;
-            break;
-        }
+            CredCompareResult_t cmpRes = CompareCredential(temp, newCred);
+            if(CRED_CMP_EQUAL == cmpRes)
+            {
+                OIC_LOG_V(WARNING, TAG, "Detected same credential ID(%d)" \
+                          "new credential's ID will be replaced.", temp->credId);
+                newCred->credId = temp->credId;
+                newCred->next = temp->next;
 
-        if (CRED_CMP_ERROR == cmpRes)
-        {
-            OIC_LOG_V(WARNING, TAG, "Credential skipped : %d", cmpRes);
-            ret = OC_STACK_ERROR;
-            validFlag = false;
-            break;
+                if(NULL == prev)
+                {
+                    gCred = newCred;
+                }
+                else
+                {
+                    prev->next = newCred;
+                }
+
+                FreeCred(temp);
+                ret = OC_STACK_OK;
+                validFlag = false;
+                break;
+            }
+
+            if (CRED_CMP_ERROR == cmpRes)
+            {
+                OIC_LOG_V(WARNING, TAG, "Credential skipped : %d", cmpRes);
+                ret = OC_STACK_ERROR;
+                validFlag = false;
+                break;
+            }
+
+            prev = temp;
         }
     }
 
     //Append the new Cred to existing list if new Cred is valid
     if (validFlag)
     {
+        OIC_LOG(INFO, TAG, "New credentials are added to the cred resource");
         LL_APPEND(gCred, newCred);
     }
-
-    memcpy(&(gCred->rownerID), &(newCred->rownerID), sizeof(OicUuid_t));
+    if (memcmp(&(newCred->rownerID), &emptyOwner, sizeof(OicUuid_t)) != 0)
+    {
+        memcpy(&(gCred->rownerID), &(newCred->rownerID), sizeof(OicUuid_t));
+    }
     if (UpdatePersistentStorage(gCred))
     {
+        OIC_LOG(DEBUG, TAG, "UpdatePersistentStorage() Success");
         ret = OC_STACK_OK;
     }
-
+    else
+    {
+        OIC_LOG(ERROR, TAG, "UpdatePersistentStorage() Failed");
+        LL_DELETE(gCred, newCred);
+        ret = OC_STACK_INCONSISTENT_DB;
+    }
 exit:
+    OIC_LOG(DEBUG, TAG, "OUT AddCredential");
     return ret;
 }
 
@@ -1437,6 +1630,8 @@ static bool FillPrivateDataOfOwnerPSK(OicSecCred_t* receviedCred, const CAEndpoi
 {
     //Derive OwnerPSK locally
     const char* oxmLabel = GetOxmString(doxm->oxmSel);
+    char* b64Buf = NULL;
+    size_t b64BufSize = 0;
     VERIFY_NON_NULL(TAG, oxmLabel, ERROR);
 
     uint8_t ownerPSK[OWNER_PSK_LENGTH_128] = {0};
@@ -1455,45 +1650,220 @@ static bool FillPrivateDataOfOwnerPSK(OicSecCred_t* receviedCred, const CAEndpoi
     // TODO: Added as workaround, will be replaced soon.
     if(OIC_ENCODING_RAW == receviedCred->privateData.encoding)
     {
+#ifndef __TIZENRT__
         receviedCred->privateData.data = (uint8_t *)OICCalloc(1, OWNER_PSK_LENGTH_128);
+#else
+        receviedCred->privateData.data = (uint8_t *)OICRealloc(receviedCred->privateData.data, OWNER_PSK_LENGTH_128);
+#endif
         VERIFY_NON_NULL(TAG, receviedCred->privateData.data, ERROR);
         receviedCred->privateData.len = OWNER_PSK_LENGTH_128;
         memcpy(receviedCred->privateData.data, ownerPSK, OWNER_PSK_LENGTH_128);
     }
     else if(OIC_ENCODING_BASE64 == receviedCred->privateData.encoding)
     {
+        B64Result b64res = B64_OK;
         uint32_t b64OutSize = 0;
-        size_t b64BufSize = B64ENCODE_OUT_SAFESIZE((OWNER_PSK_LENGTH_128 + 1));
-        char* b64Buf = OICCalloc(1, b64BufSize);
+        b64BufSize = B64ENCODE_OUT_SAFESIZE((OWNER_PSK_LENGTH_128 + 1));
+        b64Buf = OICCalloc(1, b64BufSize);
         VERIFY_NON_NULL(TAG, b64Buf, ERROR);
 
-        b64Encode(ownerPSK, OWNER_PSK_LENGTH_128, b64Buf, b64BufSize, &b64OutSize);
-
+        b64res = b64Encode(ownerPSK, OWNER_PSK_LENGTH_128, b64Buf, b64BufSize, &b64OutSize);
+        VERIFY_SUCCESS(TAG, B64_OK == b64res, ERROR);
+#ifndef __TIZENRT__
         receviedCred->privateData.data = (uint8_t *)OICCalloc(1, b64OutSize + 1);
+#else
+        receviedCred->privateData.data = (uint8_t *)OICRealloc(receviedCred->privateData.data, b64OutSize + 1);
+#endif
         VERIFY_NON_NULL(TAG, receviedCred->privateData.data, ERROR);
         receviedCred->privateData.len = b64OutSize;
         strncpy((char*)receviedCred->privateData.data, b64Buf, b64OutSize);
         receviedCred->privateData.data[b64OutSize] = '\0';
+        OICClearMemory(b64Buf, b64BufSize);
+        OICFree(b64Buf);
+        b64Buf = NULL;
     }
     else
     {
-        // TODO: error
         VERIFY_SUCCESS(TAG, OIC_ENCODING_UNKNOW, ERROR);
     }
 
     OIC_LOG(INFO, TAG, "PrivateData of OwnerPSK was calculated successfully");
 
+    OICClearMemory(ownerPSK, sizeof(ownerPSK));
+
     //Verify OwnerPSK information
     return (memcmp(&(receviedCred->subject), &(doxm->owner), sizeof(OicUuid_t)) == 0 &&
             receviedCred->credType == SYMMETRIC_PAIR_WISE_KEY);
 exit:
     //receviedCred->privateData.data will be deallocated when deleting credential.
+    OICClearMemory(ownerPSK, sizeof(ownerPSK));
+    OICClearMemory(b64Buf, b64BufSize);
+    OICFree(b64Buf);
+    return false;
+}
+
+
+#ifdef MULTIPLE_OWNER
+/**
+ * Internal function to fill private data of SubOwner PSK.
+ *
+ * @param receviedCred recevied owner credential from SubOwner
+ * @param ownerAdd address of SubOwner
+ * @param doxm current device's doxm resource
+ *
+ * @return
+ *     true successfully done and valid subower psk information
+ *     false Invalid subowner psk information or failed to subowner psk generation
+ */
+static bool FillPrivateDataOfSubOwnerPSK(OicSecCred_t* receivedCred, const CAEndpoint_t* ownerAddr,
+                           const OicSecDoxm_t* doxm, const OicUuid_t* subOwner)
+{
+    char* b64Buf = NULL;
+    //Derive OwnerPSK locally
+    const char* oxmLabel = GetOxmString(doxm->oxmSel);
+    VERIFY_NON_NULL(TAG, oxmLabel, ERROR);
+
+    uint8_t subOwnerPSK[OWNER_PSK_LENGTH_128] = {0};
+    CAResult_t pskRet = CAGenerateOwnerPSK(ownerAddr,
+        (uint8_t*)oxmLabel, strlen(oxmLabel),
+        subOwner->id, sizeof(subOwner->id),
+        doxm->deviceID.id, sizeof(doxm->deviceID.id),
+        subOwnerPSK, OWNER_PSK_LENGTH_128);
+    VERIFY_SUCCESS(TAG, pskRet == CA_STATUS_OK, ERROR);
+
+    OIC_LOG(DEBUG, TAG, "SubOwnerPSK dump :");
+    OIC_LOG_BUFFER(DEBUG, TAG, subOwnerPSK, OWNER_PSK_LENGTH_128);
+
+    //Generate owner credential based on received credential information
+
+    if(OIC_ENCODING_RAW == receivedCred->privateData.encoding)
+    {
+        receivedCred->privateData.data = (uint8_t *)OICCalloc(1, OWNER_PSK_LENGTH_128);
+        VERIFY_NON_NULL(TAG, receivedCred->privateData.data, ERROR);
+        receivedCred->privateData.len = OWNER_PSK_LENGTH_128;
+        memcpy(receivedCred->privateData.data, subOwnerPSK, OWNER_PSK_LENGTH_128);
+    }
+    else if(OIC_ENCODING_BASE64 == receivedCred->privateData.encoding)
+    {
+        uint32_t b64OutSize = 0;
+        size_t b64BufSize = B64ENCODE_OUT_SAFESIZE((OWNER_PSK_LENGTH_128 + 1));
+        b64Buf = OICCalloc(1, b64BufSize);
+        VERIFY_NON_NULL(TAG, b64Buf, ERROR);
+
+        VERIFY_SUCCESS(TAG, \
+                       B64_OK == b64Encode(subOwnerPSK, OWNER_PSK_LENGTH_128, b64Buf, b64BufSize, &b64OutSize), \
+                       ERROR);
+
+        receivedCred->privateData.data = (uint8_t *)OICCalloc(1, b64OutSize + 1);
+        VERIFY_NON_NULL(TAG, receivedCred->privateData.data, ERROR);
+        receivedCred->privateData.len = b64OutSize;
+        strncpy((char*)receivedCred->privateData.data, b64Buf, b64OutSize);
+        receivedCred->privateData.data[b64OutSize] = '\0';
+    }
+    else
+    {
+        OIC_LOG(INFO, TAG, "Unknown credential encoding type.");
+        VERIFY_SUCCESS(TAG, OIC_ENCODING_UNKNOW, ERROR);
+    }
+
+    OIC_LOG(INFO, TAG, "PrivateData of SubOwnerPSK was calculated successfully");
+    OICFree(b64Buf);
+    return true;
+exit:
+    //receivedCred->privateData.data will be deallocated when deleting credential.
+    OICFree(b64Buf);
     return false;
 }
+#endif //MULTIPLE_OWNER
+
+
+OCStackResult AddPreconfPinCredential(const char* preconfPin)
+{
+    OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
+
+#ifdef MULTIPLE_OWNER
+    OCStackResult res = OC_STACK_INVALID_PARAM;
+    OicSecCred_t* cred = NULL;
+    OicSecCred_t* pinCred = NULL;
+    VERIFY_NON_NULL(TAG, preconfPin, ERROR);
+    VERIFY_SUCCESS(TAG, (strlen(preconfPin) >= PRECONF_PIN_MIN_SIZE), ERROR);
+
+    OIC_LOG(DEBUG, TAG, "Finding previous preconfigured PIN...");
+    //Find the previous PIN
+    LL_FOREACH(gCred, cred)
+    {
+        if(memcmp(cred->subject.id, WILDCARD_SUBJECT_ID.id, sizeof(cred->subject.id)) == 0 &&
+            PIN_PASSWORD == cred->credType)
+        {
+            break;
+        }
+    }
+
+    //If previous PIN is exist, remove it.
+    if (cred)
+    {
+        OIC_LOG_V(DEBUG, TAG, "Preconfigured PIN already exist.");
+        OIC_LOG_V(DEBUG, TAG, "Previous preconfigured PIN will be removed.");
+
+        res = RemoveCredentialByCredId(cred->credId);
+        if (OC_STACK_RESOURCE_DELETED != res)
+        {
+            OIC_LOG_V(ERROR, TAG, "RemoveCredentialByCredId error : %d", res);
+            cred = NULL;
+            goto exit;
+        }
+    }
+
+    OIC_LOG(DEBUG, TAG, "Adding preconfigured PIN...");
+    //Add preconfig PIN
+    res = OC_STACK_NO_MEMORY;
+    //Generate PIN based credential
+    size_t preconfPinLen = strlen(preconfPin);
+    pinCred = (OicSecCred_t*)OICCalloc(1, sizeof(OicSecCred_t));
+    VERIFY_NON_NULL(TAG, pinCred, ERROR);
+
+    pinCred->privateData.data = (uint8_t*)OICMalloc(preconfPinLen + 1);
+    VERIFY_NON_NULL(TAG, pinCred->privateData.data, ERROR);
+
+    memcpy(pinCred->privateData.data, preconfPin, preconfPinLen);
+    pinCred->privateData.data[preconfPinLen] = '\0';
+    pinCred->privateData.len = preconfPinLen;
+    pinCred->privateData.encoding = OIC_ENCODING_RAW;
+    pinCred->credType = PIN_PASSWORD;
+    memcpy(pinCred->subject.id, WILDCARD_SUBJECT_ID.id, sizeof(pinCred->subject.id));
+
+    res = AddCredential(pinCred);
+    if (OC_STACK_OK != res)
+    {
+        OIC_LOG_V(ERROR, TAG, "AddCredential error : %d", res);
+        goto exit;
+    }
+
+    OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
+    return OC_STACK_OK;
+exit:
+    if (cred)
+    {
+        FreeCred(cred);
+    }
+    if (pinCred)
+    {
+        FreeCred(pinCred);
+    }
+    OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
+    return res;
+#else
+    OC_UNUSED(preconfPin);
+    OIC_LOG(DEBUG, TAG, "Multiple Owner is not enabled.");
+    OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
+    return OC_STACK_ERROR;
+#endif //MULTIPLE_OWNER
+}
+
 
 #endif // __WITH_DTLS__ or __WITH_TLS__
 
-static OCEntityHandlerResult HandlePostRequest(const OCEntityHandlerRequest * ehRequest)
+static OCEntityHandlerResult HandlePostRequest(OCEntityHandlerRequest * ehRequest)
 {
     OCEntityHandlerResult ret = OC_EH_ERROR;
     OIC_LOG(DEBUG, TAG, "HandleCREDPostRequest IN");
@@ -1517,8 +1887,32 @@ static OCEntityHandlerResult HandlePostRequest(const OCEntityHandlerRequest * eh
             {
                 case SYMMETRIC_PAIR_WISE_KEY:
                 {
-                    OCServerRequest *request = (OCServerRequest *)ehRequest->requestHandle;
+                    OCServerRequest *request = GetServerRequestUsingHandle(ehRequest->requestHandle);
+                    if (NULL == request)
+                    {
+                        OIC_LOG(ERROR, TAG, "Failed to get a server request information.");
+                        ret = OC_EH_ERROR;
+                        break;
+                    }
+#ifdef __TIZENRT__
+                    CAEndpoint_t *ep_addr = (CAEndpoint_t *)malloc(sizeof(CAEndpoint_t));
+                    if(!ep_addr)
+                    {
+                        ret = OC_STACK_NO_MEMORY;
+                        break;
+                    }
+                    ep_addr->adapter=   request->devAddr.adapter;
+                    ep_addr->flags=   request->devAddr.flags;
+                    ep_addr->port  =   request->devAddr.port;
+                    memcpy(ep_addr->addr,request->devAddr.addr,MAX_ADDR_STR_SIZE_CA);
+                    ep_addr->ifindex  =   request->devAddr.ifindex;
+#if defined (ROUTING_GATEWAY) || defined (ROUTING_EP)
+                    memcpy(ep_addr->routeData,request->devAddr.routeData,MAX_ADDR_STR_SIZE_CA);
+#endif
+                    if(FillPrivateDataOfOwnerPSK(cred, ep_addr, doxm))
+#else
                     if(FillPrivateDataOfOwnerPSK(cred, (CAEndpoint_t *)&request->devAddr, doxm))
+#endif
                     {
                         if(OC_STACK_RESOURCE_DELETED == RemoveCredential(&cred->subject))
                         {
@@ -1541,7 +1935,9 @@ static OCEntityHandlerResult HandlePostRequest(const OCEntityHandlerRequest * eh
                         OIC_LOG(ERROR, TAG, "Failed to verify receviced OwnerPKS.");
                         ret = OC_EH_ERROR;
                     }
-
+#ifdef __TIZENRT__
+                    free(ep_addr);
+#endif
                     if(OC_EH_CHANGED == ret)
                     {
                         /**
@@ -1550,8 +1946,7 @@ static OCEntityHandlerResult HandlePostRequest(const OCEntityHandlerRequest * eh
                          */
                         if(OIC_RANDOM_DEVICE_PIN == doxm->oxmSel)
                         {
-                            OicUuid_t emptyUuid = { .id={0}};
-                            SetUuidForRandomPinOxm(&emptyUuid);
+                            SetUuidForPinBasedOxm(&emptyUuid);
 
 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
                             if(CA_STATUS_OK != CAregisterPskCredentialsHandler(GetDtlsPskCredentials))
@@ -1561,8 +1956,21 @@ static OCEntityHandlerResult HandlePostRequest(const OCEntityHandlerRequest * eh
                                 break;
                             }
 #endif // __WITH_DTLS__ or __WITH_TLS__
-                        }
-
+                        }
+                        else
+                        {
+                            if(OIC_MANUFACTURER_CERTIFICATE == doxm->oxmSel)
+                            {
+#if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
+                                if(CA_STATUS_OK != CAregisterPskCredentialsHandler(GetDtlsPskCredentials))
+                                {
+                                    OIC_LOG(ERROR, TAG, "Failed to revert TLS credential handler.");
+                                    ret = OC_EH_ERROR;
+                                    break;
+                                }
+#endif // __WITH_DTLS__ or __WITH_TLS__
+                             }
+                         }
                         //Select cipher suite to use owner PSK
                         if(CA_STATUS_OK != CAEnableAnonECDHCipherSuite(false))
                         {
@@ -1574,12 +1982,17 @@ static OCEntityHandlerResult HandlePostRequest(const OCEntityHandlerRequest * eh
                             OIC_LOG(INFO, TAG, "Anonymous cipher suite is DISABLED");
                         }
 
-                        if(CA_STATUS_OK !=
-                           CASelectCipherSuite(TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA_256, ehRequest->devAddr.adapter))
+                        if (CA_STATUS_OK != CASelectCipherSuite(
+                                    MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256, CA_ADAPTER_IP))
                         {
-                            OIC_LOG(ERROR, TAG, "Failed to select cipher suite");
+                            OIC_LOG(ERROR, TAG, "Failed to enable PSK cipher suite");
                             ret = OC_EH_ERROR;
                         }
+                        else
+                        {
+                            OIC_LOG(INFO, TAG, "PSK cipher suite is ENABLED");
+                        }
+
                     }
 
                     break;
@@ -1596,7 +2009,7 @@ static OCEntityHandlerResult HandlePostRequest(const OCEntityHandlerRequest * eh
                 }
                 default:
                 {
-                    OIC_LOG(WARNING, TAG, "Unknow credential type for owner credential.");
+                    OIC_LOG(WARNING, TAG, "Unknown credential type for owner credential.");
                     ret = OC_EH_ERROR;
                     break;
                 }
@@ -1611,12 +2024,21 @@ static OCEntityHandlerResult HandlePostRequest(const OCEntityHandlerRequest * eh
                 const OicSecDoxm_t* doxm =  GetDoxmResourceData();
                 if(doxm)
                 {
-                    if(!doxm->owned && previousMsgId != ehRequest->messageID)
+                    if(!doxm->owned)
                     {
-                        OIC_LOG(WARNING, TAG, "The operation failed during handle DOXM request,"\
-                                            "DOXM will be reverted.");
-                        RestoreDoxmToInitState();
-                        RestorePstatToInitState();
+                        OIC_LOG(WARNING, TAG, "The operation failed during handle DOXM request");
+
+                        if((OC_ADAPTER_IP == ehRequest->devAddr.adapter && previousMsgId != ehRequest->messageID)
+                           || OC_ADAPTER_TCP == ehRequest->devAddr.adapter)
+                        {
+#if defined (__WITH_TLS__) || defined(__WITH_DTLS__)
+                            InvokeOtmEventHandler(ehRequest->devAddr.addr, ehRequest->devAddr.port,
+                                                  NULL, OIC_OTM_ERROR);
+#endif
+                            RestoreDoxmToInitState();
+                            RestorePstatToInitState();
+                            OIC_LOG(WARNING, TAG, "DOXM will be reverted.");
+                        }
                     }
                 }
                 else
@@ -1625,15 +2047,97 @@ static OCEntityHandlerResult HandlePostRequest(const OCEntityHandlerRequest * eh
                 }
             }
         }
+#ifdef MULTIPLE_OWNER
+        // In case SubOwner Credential
+        else if(doxm && doxm->owned && doxm->mom &&
+                OIC_MULTIPLE_OWNER_DISABLE != doxm->mom->mode &&
+                0 == cred->privateData.len &&
+                0 == cred->optionalData.len &&
+                0 == cred->publicData.len )
+        {
+            switch(cred->credType)
+            {
+                case SYMMETRIC_PAIR_WISE_KEY:
+                {
+                    OCServerRequest *request = GetServerRequestUsingHandle(ehRequest->requestHandle);
+                    if(FillPrivateDataOfSubOwnerPSK(cred, (CAEndpoint_t *)&request->devAddr, doxm, &cred->subject))
+                    {
+                        if(OC_STACK_RESOURCE_DELETED == RemoveCredential(&cred->subject))
+                        {
+                            OIC_LOG(WARNING, TAG, "The credential with the same subject ID was detected!");
+                        }
+
+                        OIC_LOG(ERROR, TAG, "SubOwnerPSK was generated successfully.");
+                        if(OC_STACK_OK == AddCredential(cred))
+                        {
+                            ret = OC_EH_CHANGED;
+                        }
+                        else
+                        {
+                            OIC_LOG(ERROR, TAG, "Failed to save the SubOwnerPSK as cred resource");
+                            ret = OC_EH_ERROR;
+                        }
+                    }
+                    else
+                    {
+                        OIC_LOG(ERROR, TAG, "Failed to verify receviced SubOwner PSK.");
+                        ret = OC_EH_ERROR;
+                    }
+                }
+                break;
+
+                case SYMMETRIC_GROUP_KEY:
+                case ASYMMETRIC_KEY:
+                case SIGNED_ASYMMETRIC_KEY:
+                case PIN_PASSWORD:
+                case ASYMMETRIC_ENCRYPTION_KEY:
+                {
+                    OIC_LOG(WARNING, TAG, "Unsupported credential type for SubOwner credential.");
+                    ret = OC_EH_ERROR;
+                    break;
+                }
+                default:
+                {
+                    OIC_LOG(WARNING, TAG, "Unknown credential type for SubOwner credential.");
+                    ret = OC_EH_ERROR;
+                    break;
+                }
+            }
+        }
+#endif //MULTIPLE_OWNER
         else
         {
-            /*
-             * If the post request credential has credId, it will be
-             * discarded and the next available credId will be assigned
-             * to it before getting appended to the existing credential
-             * list and updating svr database.
-             */
-            ret = (OC_STACK_OK == AddCredential(cred))? OC_EH_CHANGED : OC_EH_ERROR;
+            if(IsEmptyCred(cred))
+            {
+                OicUuid_t emptyUuid = {.id={0}};
+                if(memcmp(cred->rownerID.id, emptyUuid.id, sizeof(emptyUuid.id)) != 0)
+                {
+                    OIC_LOG(INFO, TAG, "CRED's rowner will be updated.");
+                    memcpy(gCred->rownerID.id, cred->rownerID.id, sizeof(cred->rownerID.id));
+                    if (UpdatePersistentStorage(gCred))
+                    {
+                        ret = OC_EH_CHANGED;
+                    }
+                    else
+                    {
+                        ret = OC_EH_ERROR;
+                    }
+                }
+                else
+                {
+                    ret = OC_EH_ERROR;
+                }
+            }
+            else
+            {
+                /*
+                 * If the post request credential has credId, it will be
+                 * discarded and the next available credId will be assigned
+                 * to it before getting appended to the existing credential
+                 * list and updating svr database.
+                 */
+                ret = (OC_STACK_OK == AddCredential(cred))? OC_EH_CHANGED : OC_EH_ERROR;
+            }
         }
 #else //not __WITH_DTLS__
         /*
@@ -1657,7 +2161,10 @@ static OCEntityHandlerResult HandlePostRequest(const OCEntityHandlerRequest * eh
     }
     else
     {
-        previousMsgId = ehRequest->messageID;
+        if(OC_ADAPTER_IP == ehRequest->devAddr.adapter)
+        {
+            previousMsgId = ehRequest->messageID++;
+        }
     }
     //Send response to request originator
     ret = ((SendSRMResponse(ehRequest, ret, NULL, 0)) == OC_STACK_OK) ?
@@ -1693,6 +2200,7 @@ static OCEntityHandlerResult HandleGetRequest (const OCEntityHandlerRequest * eh
     //Send payload to request originator
     ehRet = ((SendSRMResponse(ehRequest, ehRet, payload, size)) == OC_STACK_OK) ?
                        OC_EH_OK : OC_EH_ERROR;
+    OICClearMemory(payload, size);
     OICFree(payload);
     return ehRet;
 }
@@ -1791,6 +2299,7 @@ OCStackResult CreateCredResource()
 OCStackResult InitCredResource()
 {
     OCStackResult ret = OC_STACK_ERROR;
+    OicSecCred_t* cred = NULL;
 
     //Read Cred resource from PS
     uint8_t *data = NULL;
@@ -1803,7 +2312,7 @@ OCStackResult InitCredResource()
     }
     if (data)
     {
-        // Read ACL resource from PS
+        // Read Cred resource from PS
         ret = CBORPayloadToCred(data, size, &gCred);
     }
 
@@ -1816,8 +2325,51 @@ OCStackResult InitCredResource()
     {
         gCred = GetCredDefault();
     }
+
+    if (gCred)
+    {
+        OicUuid_t deviceID;
+        OicUuid_t emptyUuid = {.id={0}};
+
+        ret = GetDoxmDeviceID(&deviceID);
+        if (ret != OC_STACK_OK)
+        {
+            OIC_LOG_V(WARNING, TAG, "%s: GetDoxmDeviceID failed, error %d", __func__, ret);
+            //Unit tests expect error code OC_STACK_INVALID_PARAM.
+            ret = OC_STACK_INVALID_PARAM;
+            goto exit;
+        }
+
+        //Add a log to track the invalid credential.
+        LL_FOREACH(gCred, cred)
+        {
+            if (false == CheckSubjectOfCertificate(cred, deviceID))
+            {
+                OIC_LOG(WARNING, TAG, "Check subject of Certificate was failed while InitCredResource");
+            }
+            if (false == IsValidCredential(cred))
+            {
+                OIC_LOG(WARNING, TAG, "Invalid credential data was dectected while InitCredResource");
+                OIC_LOG_V(WARNING, TAG, "Invalid credential ID = %d", cred->credId);
+            }
+        }
+
+        if (0 == memcmp(&gCred->rownerID, &emptyUuid, sizeof(OicUuid_t)))
+        {
+            memcpy(&gCred->rownerID, &deviceID, sizeof(OicUuid_t));
+        }
+
+        if (!UpdatePersistentStorage(gCred))
+        {
+            OIC_LOG(FATAL, TAG, "UpdatePersistentStorage failed!");
+        }
+    }
     //Instantiate 'oic.sec.cred'
     ret = CreateCredResource();
+
+exit:
+    OIC_LOG(DEBUG, TAG, "OUT InitCredResource.");
+    OICClearMemory(data, size);
     OICFree(data);
     return ret;
 }
@@ -1825,8 +2377,11 @@ OCStackResult InitCredResource()
 OCStackResult DeInitCredResource()
 {
     OCStackResult result = OCDeleteResource(gCredHandle);
-    DeleteCredList(gCred);
-    gCred = NULL;
+    gCredHandle = NULL;
+    if(gCred){
+        DeleteCredList(gCred);
+        gCred = NULL;
+    }
     return result;
 }
 
@@ -1854,22 +2409,76 @@ const OicSecCred_t* GetCredList()
     return gCred;
 }
 
-OicSecCred_t* GetCredResourceDataByCredId(const uint16_t credId)
+OicSecCred_t* GetCredEntryByCredId(const uint16_t credId)
 {
     OicSecCred_t *cred = NULL;
+    OicSecCred_t *tmpCred = NULL;
 
    if ( 1 > credId)
     {
        return NULL;
     }
 
-    LL_FOREACH(gCred, cred)
+    LL_FOREACH(gCred, tmpCred)
     {
-        if(cred->credId == credId)
+        if(tmpCred->credId == credId)
         {
+            cred = (OicSecCred_t*)OICCalloc(1, sizeof(OicSecCred_t));
+            VERIFY_NON_NULL(TAG, cred, ERROR);
+
+            // common
+            cred->next = NULL;
+            cred->credId = tmpCred->credId;
+            cred->credType = tmpCred->credType;
+            memcpy(cred->subject.id, tmpCred->subject.id , sizeof(cred->subject.id));
+            memcpy(cred->rownerID.id, tmpCred->rownerID.id , sizeof(cred->rownerID.id));
+            if (tmpCred->period)
+            {
+                cred->period = OICStrdup(tmpCred->period);
+            }
+
+            // key data
+            if (tmpCred->privateData.data)
+            {
+                cred->privateData.data = (uint8_t *)OICCalloc(1, tmpCred->privateData.len);
+                VERIFY_NON_NULL(TAG, cred->privateData.data, ERROR);
+
+                memcpy(cred->privateData.data, tmpCred->privateData.data, tmpCred->privateData.len);
+                cred->privateData.len = tmpCred->privateData.len;
+                cred->privateData.encoding = tmpCred->privateData.encoding;
+            }
+#if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
+            if (tmpCred->publicData.data)
+            {
+                cred->publicData.data = (uint8_t *)OICCalloc(1, tmpCred->publicData.len);
+                VERIFY_NON_NULL(TAG, cred->publicData.data, ERROR);
+
+                memcpy(cred->publicData.data, tmpCred->publicData.data, tmpCred->publicData.len);
+                cred->publicData.len = tmpCred->publicData.len;
+                cred->publicData.encoding = tmpCred->publicData.encoding;
+            }
+            if (tmpCred->optionalData.data)
+            {
+                cred->optionalData.data = (uint8_t *)OICCalloc(1, tmpCred->optionalData.len);
+                VERIFY_NON_NULL(TAG, cred->optionalData.data, ERROR);
+
+                memcpy(cred->optionalData.data, tmpCred->optionalData.data, tmpCred->optionalData.len);
+                cred->optionalData.len = tmpCred->optionalData.len;
+                cred->optionalData.encoding = tmpCred->optionalData.encoding;
+                cred->optionalData.revstat= tmpCred->optionalData.revstat;
+            }
+            if (tmpCred->credUsage)
+            {
+                cred->credUsage = OICStrdup(tmpCred->credUsage);
+            }
+#endif /* __WITH_DTLS__  or __WITH_TLS__*/
+
             return cred;
         }
     }
+
+exit:
+    FreeCred(cred);
     return NULL;
 }
 
@@ -1948,7 +2557,7 @@ int32_t GetDtlsPskCredentials(CADtlsPskCredType_t type,
                             uint32_t outKeySize;
                             if(NULL == outKey)
                             {
-                                OIC_LOG (ERROR, TAG, "Failed to memoray allocation.");
+                                OIC_LOG (ERROR, TAG, "Failed to allocate memory.");
                                 return ret;
                             }
 
@@ -1968,6 +2577,105 @@ int32_t GetDtlsPskCredentials(CADtlsPskCredType_t type,
                         return ret;
                     }
                 }
+                OIC_LOG(DEBUG, TAG, "Can not find subject matched credential.");
+
+#ifdef MULTIPLE_OWNER
+                const OicSecDoxm_t* doxm = GetDoxmResourceData();
+                if(doxm && doxm->mom && OIC_MULTIPLE_OWNER_DISABLE != doxm->mom->mode)
+                {
+                    // in case of multiple owner transfer authentication
+                    if(OIC_PRECONFIG_PIN == doxm->oxmSel)
+                    {
+                        OicSecCred_t* wildCardCred = GetCredResourceData(&WILDCARD_SUBJECT_ID);
+                        if(wildCardCred)
+                        {
+                            OIC_LOG(DEBUG, TAG, "Detected wildcard credential.");
+                            if(PIN_PASSWORD == wildCardCred->credType)
+                            {
+                                //Read PIN/PW
+                                char* pinBuffer = NULL;
+                                uint32_t pinLength = 0;
+                                if(OIC_ENCODING_RAW == wildCardCred->privateData.encoding)
+                                {
+                                    pinBuffer = OICCalloc(1, wildCardCred->privateData.len + 1);
+                                    if(NULL == pinBuffer)
+                                    {
+                                        OIC_LOG (ERROR, TAG, "Failed to allocate memory.");
+                                        return ret;
+                                    }
+                                    pinLength = wildCardCred->privateData.len;
+                                    memcpy(pinBuffer, wildCardCred->privateData.data, pinLength);
+                                }
+                                else if(OIC_ENCODING_BASE64 == wildCardCred->privateData.encoding)
+                                {
+                                    size_t pinBufSize = B64DECODE_OUT_SAFESIZE((wildCardCred->privateData.len + 1));
+                                    pinBuffer = OICCalloc(1, pinBufSize);
+                                    if(NULL == pinBuffer)
+                                    {
+                                        OIC_LOG (ERROR, TAG, "Failed to allocate memory.");
+                                        return ret;
+                                    }
+
+                                    if(B64_OK != b64Decode((char*)wildCardCred->privateData.data, wildCardCred->privateData.len, pinBuffer, pinBufSize, &pinLength))
+                                    {
+                                        OIC_LOG (ERROR, TAG, "Failed to base64 decoding.");
+                                        return ret;
+                                    }
+                                }
+                                else
+                                {
+                                    OIC_LOG(ERROR, TAG, "Unknown encoding type of PIN/PW credential.");
+                                    return ret;
+                                }
+
+                                //Set the PIN/PW to derive PSK
+                                if (OC_STACK_OK != SetPreconfigPin(pinBuffer, pinLength))
+                                {
+                                    OICFree(pinBuffer);
+                                    OIC_LOG(ERROR, TAG, "Failed to load PIN data.");
+                                    return ret;
+                                }
+                                OICFree(pinBuffer);
+
+                                OicUuid_t myUuid;
+                                if(OC_STACK_OK != GetDoxmDeviceID(&myUuid))
+                                {
+                                    OIC_LOG(ERROR, TAG, "Failed to read device ID");
+                                    return ret;
+                                }
+                                SetUuidForPinBasedOxm(&myUuid);
+
+                                //Calculate PSK using PIN/PW
+                                if(0 == DerivePSKUsingPIN((uint8_t*)result))
+                                {
+                                    ret = OWNER_PSK_LENGTH_128;
+                                }
+                                else
+                                {
+                                    OIC_LOG_V(ERROR, TAG, "Failed to derive crypto key from PIN");
+                                }
+
+                                if(CA_STATUS_OK != CAregisterSslHandshakeCallback(MultipleOwnerDTLSHandshakeCB))
+                                {
+                                    OIC_LOG(WARNING, TAG, "Error while bind the DTLS Handshake Callback.");
+                                }
+                            }
+                        }
+                    }
+                    else if(OIC_RANDOM_DEVICE_PIN == doxm->oxmSel)
+                    {
+                        if(0 == DerivePSKUsingPIN((uint8_t*)result))
+                        {
+                            ret = OWNER_PSK_LENGTH_128;
+                        }
+                        else
+                        {
+                            OIC_LOG_V(ERROR, TAG, "Failed to derive crypto key from PIN : result");
+                            ret = -1;
+                        }
+                    }
+                }
+#endif //MULTIPLE_OWNER
             }
             break;
     }
@@ -2008,7 +2716,8 @@ OCStackResult AddTmpPskWithPIN(const OicUuid_t* tmpSubject, OicSecCredType_t cre
     VERIFY_SUCCESS(TAG, (0 == dtlsRes) , ERROR);
 
     cred = GenerateCredential(tmpSubject, credType, NULL,
-                              &privKey, rownerID);
+                              &privKey, rownerID, NULL);
+    OICClearMemory(privData, sizeof(privData));
     if(NULL == cred)
     {
         OIC_LOG(ERROR, TAG, "GeneratePskWithPIN() : Failed to generate credential");
@@ -2020,7 +2729,7 @@ OCStackResult AddTmpPskWithPIN(const OicUuid_t* tmpSubject, OicSecCredType_t cre
     ret = AddCredential(cred);
     if( OC_STACK_OK != ret)
     {
-        RemoveCredential(tmpSubject);
+        FreeCred(cred);
         OIC_LOG(ERROR, TAG, "GeneratePskWithPIN() : Failed to add credential");
     }
     OIC_LOG(DEBUG, TAG, "AddTmpPskWithPIN OUT");
@@ -2085,34 +2794,34 @@ OCStackResult GetCredRownerId(OicUuid_t *rowneruuid)
 }
 
 #if defined (__WITH_TLS__) || defined(__WITH_DTLS__)
-void GetDerCaCert(ByteArray_t * crt)
+void GetDerCaCert(ByteArray_t * crt, const char * usage)
 {
-    if (NULL == crt)
+    OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
+    if (NULL == crt || NULL == usage)
     {
+        OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
         return;
     }
-    uint8_t *data = NULL;
     crt->len = 0;
-    OCStackResult ret = OC_STACK_ERROR;
-    OicSecCred_t * cred;
-    OicSecCred_t * temp = NULL;
-    OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
+    OicSecCred_t* temp = NULL;
+
     LL_FOREACH(gCred, temp)
     {
-        if (SIGNED_ASYMMETRIC_KEY == temp->credType && 0 == memcmp((temp->credUsage), TRUST_CA, strlen(TRUST_CA) + 1))
+        if ((SIGNED_ASYMMETRIC_KEY == temp->credType) &&
+            (0 == strcmp(temp->credUsage, usage)) && (false == temp->optionalData.revstat))
         {
-            OIC_LOG_V(DEBUG, TAG, "len: %d, crt len: %d", temp->optionalData.len, crt->len);
             if(OIC_ENCODING_BASE64 == temp->optionalData.encoding)
             {
                 size_t bufSize = B64DECODE_OUT_SAFESIZE((temp->optionalData.len + 1));
-                uint8 * buf = OICCalloc(1, bufSize);
+                uint8_t * buf = OICCalloc(1, bufSize);
                 if(NULL == buf)
                 {
                     OIC_LOG(ERROR, TAG, "Failed to allocate memory");
                     return;
                 }
                 uint32_t outSize;
-                if(B64_OK != b64Decode(temp->optionalData.data, temp->optionalData.len, buf, bufSize, &outSize))
+                if(B64_OK != b64Decode((char*)(temp->optionalData.data),
+                                       temp->optionalData.len, buf, bufSize, &outSize))
                 {
                     OICFree(buf);
                     OIC_LOG(ERROR, TAG, "Failed to decode base64 data");
@@ -2129,84 +2838,82 @@ void GetDerCaCert(ByteArray_t * crt)
                 memcpy(crt->data + crt->len, temp->optionalData.data, temp->optionalData.len);
                 crt->len += temp->optionalData.len;
             }
-            OIC_LOG_V(DEBUG, TAG, "Trust CA Found!! %d", crt->len);
+            OIC_LOG_V(DEBUG, TAG, "%s found", usage);
         }
     }
     if(0 == crt->len)
     {
-        OIC_LOG(DEBUG, TAG, "Trust CA Not Found!!");
+        OIC_LOG_V(WARNING, TAG, "%s not found", usage);
     }
     OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
     return;
 }
 
-void GetDerOwnCert(ByteArray_t * crt)
+void GetDerOwnCert(ByteArray_t * crt, const char * usage)
 {
-    if (NULL == crt)
+    OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
+    if (NULL == crt || NULL == usage)
     {
+        OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
         return;
     }
     crt->len = 0;
-    uint8_t *data = NULL;
     OicSecCred_t * temp = NULL;
-    OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
     LL_FOREACH(gCred, temp)
     {
-        if (SIGNED_ASYMMETRIC_KEY == temp->credType && 0 == memcmp((temp->credUsage), PRIMARY_CERT, strlen(PRIMARY_CERT) + 1))
+        if (SIGNED_ASYMMETRIC_KEY == temp->credType &&
+            0 == strcmp(temp->credUsage, usage))
         {
-            OIC_LOG_V(DEBUG, TAG, "len: %d, crt len: %d", temp->publicData.len, crt->len);
             crt->data = OICRealloc(crt->data, crt->len + temp->publicData.len);
             memcpy(crt->data + crt->len, temp->publicData.data, temp->publicData.len);
             crt->len += temp->publicData.len;
-
-            OIC_LOG_V(DEBUG, TAG, "Trust CA Found!! %d", crt->len);
+            OIC_LOG_V(DEBUG, TAG, "%s found", usage);
         }
     }
     if(0 == crt->len)
     {
-        OIC_LOG(DEBUG, TAG, "Trust CA Not Found!!");
+        OIC_LOG_V(WARNING, TAG, "%s not found", usage);
     }
     OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
     return;
 }
 
-void GetDerKey(ByteArray_t * key)
+void GetDerKey(ByteArray_t * key, const char * usage)
 {
-    if (NULL == key)
+    OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
+    if (NULL == key || NULL == usage)
     {
+        OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
         return;
     }
 
-    uint8_t *data = NULL;
     OicSecCred_t * temp = NULL;
     key->len = 0;
-    OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
     LL_FOREACH(gCred, temp)
     {
-        if (SIGNED_ASYMMETRIC_KEY == temp->credType && 0 == memcmp((temp->credUsage), PRIMARY_CERT, strlen(PRIMARY_CERT) + 1))
+        if (SIGNED_ASYMMETRIC_KEY == temp->credType &&
+            0 == strcmp(temp->credUsage, usage))
         {
-            OIC_LOG_V(DEBUG, TAG, "len: %d, key len: %d", temp->privateData.len, key->len);
             key->data = OICRealloc(key->data, key->len + temp->privateData.len);
             memcpy(key->data + key->len, temp->privateData.data, temp->privateData.len);
             key->len += temp->privateData.len;
-
-            OIC_LOG_V(DEBUG, TAG, "Key Found!! %d", key->len);
+            OIC_LOG_V(DEBUG, TAG, "Key for %s found", usage);
         }
     }
     if(0 == key->len)
     {
-        OIC_LOG(DEBUG, TAG, "Key Not Found!!");
+        OIC_LOG_V(WARNING, TAG, "Key for %s not found", usage);
     }
     OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
 }
 
-void InitCipherSuiteList(bool * list)
+void InitCipherSuiteListInternal(bool * list, const char * usage)
 {
     OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
-    if (NULL == list)
+    if (NULL == list || NULL == usage)
     {
+        OIC_LOG(DEBUG, TAG, "NULL passed");
         OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
-        OIC_LOG(DEBUG, TAG, "NULL list param");
         return;
     }
     OicSecCred_t * temp = NULL;
@@ -2214,6 +2921,12 @@ void InitCipherSuiteList(bool * list)
     {
         switch (temp->credType)
         {
+            case PIN_PASSWORD:
+            {
+                list[0] = true;
+                OIC_LOG(DEBUG, TAG, "PIN_PASSWORD found");
+                break;
+            }
             case SYMMETRIC_PAIR_WISE_KEY:
             {
                 list[0] = true;
@@ -2222,13 +2935,15 @@ void InitCipherSuiteList(bool * list)
             }
             case SIGNED_ASYMMETRIC_KEY:
             {
-                list[1] = true;
-                OIC_LOG(DEBUG, TAG, "SIGNED_ASYMMETRIC_KEY found");
+                if (0 == strcmp(temp->credUsage, usage))
+                {
+                    list[1] = true;
+                    OIC_LOG_V(DEBUG, TAG, "SIGNED_ASYMMETRIC_KEY found for %s", usage);
+                }
                 break;
             }
             case SYMMETRIC_GROUP_KEY:
             case ASYMMETRIC_KEY:
-            case PIN_PASSWORD:
             case ASYMMETRIC_ENCRYPTION_KEY:
             {
                 OIC_LOG(WARNING, TAG, "Unsupported credential type for TLS.");
@@ -2236,7 +2951,7 @@ void InitCipherSuiteList(bool * list)
             }
             default:
             {
-                OIC_LOG(WARNING, TAG, "Unknow credential type for TLS.");
+                OIC_LOG(WARNING, TAG, "Unknown credential type for TLS.");
                 break;
             }
         }
@@ -2244,3 +2959,157 @@ void InitCipherSuiteList(bool * list)
     OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
 }
 #endif
+
+
+//Added as workaround by Chul Lee
+#if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
+OCStackResult CredSaveTrustCertChain(const OicUuid_t* subject, uint8_t *trustCertChain, size_t chainSize,
+                                            OicEncodingType_t encodingType,  const char* usage, uint16_t *credId)
+{
+    OIC_LOG_V(DEBUG, TAG, "IN %s", __func__);
+
+    if(NULL == trustCertChain || NULL == credId || NULL == usage || NULL == subject)
+    {
+        OIC_LOG_V(ERROR, TAG, "Invaild param");
+        return OC_STACK_INVALID_PARAM;
+    }
+
+    OCStackResult res = OC_STACK_ERROR;
+    OicSecCred_t *cred = (OicSecCred_t*)OICCalloc(1, sizeof(OicSecCred_t));
+    if(NULL == cred)
+    {
+        OIC_LOG_V(ERROR, TAG, "Failed to allocate memory");
+        res = OC_STACK_NO_MEMORY;
+        goto error;
+    }
+    cred->credId = 0;
+    memcpy(cred->subject.id, subject->id, sizeof(cred->subject.id));
+
+    cred->credUsage = OICStrdup(usage);
+    if (NULL == cred->credUsage)
+    {
+        OIC_LOG_V(ERROR, TAG, "Failed to allocate memory");
+        res = OC_STACK_NO_MEMORY;
+        goto error;
+    }
+
+    cred->credType = SIGNED_ASYMMETRIC_KEY;
+
+    if (encodingType == OIC_ENCODING_PEM)
+    {
+        cred->optionalData.data = (uint8_t *)OICCalloc(1, chainSize + 1);
+        if(NULL == cred->optionalData.data)
+        {
+            OIC_LOG_V(ERROR, TAG, "Failed to allocate memory");
+            res = OC_STACK_NO_MEMORY;
+            goto error;
+        }
+        cred->optionalData.len = chainSize + 1;
+    }
+    else
+    {
+        cred->optionalData.data = (uint8_t *)OICCalloc(1, chainSize);
+        if(NULL == cred->optionalData.data)
+        {
+            OIC_LOG_V(ERROR, TAG, "Failed to allocate memory");
+            res = OC_STACK_NO_MEMORY;
+            goto error;
+        }
+        cred->optionalData.len = chainSize;
+    }
+    memcpy(cred->optionalData.data, trustCertChain, chainSize);
+    cred->optionalData.encoding = encodingType;
+    cred->optionalData.revstat = false;
+
+    res = AddCredential(cred);
+    if(res != OC_STACK_OK)
+    {
+        goto error;
+    }
+    *credId = cred->credId;
+
+    OIC_LOG_V(DEBUG, TAG, "OUT %s", __func__);
+
+    return res;
+
+error:
+    DeleteCredList(cred);
+    OIC_LOG_V(ERROR, TAG, "OUT %s : error = %d", __func__, (int)res);
+    return res;
+}
+
+OCStackResult CredSaveOwnCert(const OicUuid_t* subject, OicSecKey_t * cert, OicSecKey_t * key,
+                                    const char* usage, uint16_t *credId)
+{
+    OIC_LOG_V(DEBUG, TAG, "IN %s", __func__);
+
+    if(NULL == cert || NULL == cert->data || NULL == key || NULL == key->data ||
+       NULL == credId || NULL == usage || NULL == subject)
+    {
+        OIC_LOG_V(ERROR, TAG, "Invalid param");
+        return OC_STACK_INVALID_PARAM;
+    }
+
+    OCStackResult res = OC_STACK_ERROR;
+    OicSecCred_t *cred = (OicSecCred_t *)OICCalloc(1, sizeof(OicSecCred_t));
+    if(NULL == cred)
+    {
+        OIC_LOG_V(ERROR, TAG, "Failed to allocate memory");
+        res = OC_STACK_NO_MEMORY;
+        goto error;
+    }
+    cred->credId = 0;
+    memcpy(cred->subject.id, subject->id, sizeof(cred->subject.id));
+
+    cred->credUsage = OICStrdup(usage);
+    if (NULL == cred->credUsage)
+    {
+        OIC_LOG_V(ERROR, TAG, "Failed to allocate memory");
+        res = OC_STACK_NO_MEMORY;
+        goto error;
+    }
+
+    cred->credType = SIGNED_ASYMMETRIC_KEY;
+
+    OicSecKey_t *publicData = &cred->publicData;
+    publicData->data = (uint8_t *)OICCalloc(1, cert->len);
+    if(NULL == publicData->data)
+    {
+        OIC_LOG_V(ERROR, TAG, "Failed to allocate memory");
+        res = OC_STACK_NO_MEMORY;
+        goto error;
+    }
+    memcpy(publicData->data, cert->data, cert->len);
+    publicData->encoding = cert->encoding;
+    publicData->len = cert->len;
+
+    OicSecKey_t *privateData = &cred->privateData;
+    privateData->data = (uint8_t *)OICCalloc(1, key->len);
+    if(NULL == privateData->data)
+    {
+        OIC_LOG_V(ERROR, TAG, "Failed to allocate memory");
+        res = OC_STACK_NO_MEMORY;
+        goto error;
+    }
+    memcpy(privateData->data, key->data, key->len);
+    privateData->len = key->len;
+    privateData->encoding = key->encoding;
+
+    res = AddCredential(cred);
+    if(res != OC_STACK_OK)
+    {
+        goto error;
+    }
+    *credId = cred->credId;
+
+    OIC_LOG_V(DEBUG, TAG, "OUT %s", __func__);
+
+    return res;
+
+error:
+    DeleteCredList(cred);
+    OIC_LOG_V(ERROR, TAG, "OUT %s : error = %d", __func__, (int)res);
+    return res;
+}
+
+#endif // defined(__WITH_DTLS__) || defined(__WITH_TLS__)