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+/*************************************************************************************************/
+/*!
+ *  \file
+ *
+ *  \brief  Counter with CBC-MAC (CCM) mode security - Native AES.
+ *
+ *  Copyright (c) 2019 Arm Ltd.
+ *
+ *  Copyright (c) 2019 Packetcraft, Inc.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+/*************************************************************************************************/
+
+#include <string.h>
+#include "wsf_types.h"
+#include "wsf_buf.h"
+#include "wsf_msg.h"
+#include "sec_api.h"
+#include "sec_main.h"
+
+#ifndef SEC_CCM_CFG
+#define SEC_CCM_CFG SEC_CCM_CFG_PLATFORM
+#endif
+
+#if SEC_CCM_CFG == SEC_CCM_CFG_PLATFORM
+
+/**************************************************************************************************
+  External Variables
+**************************************************************************************************/
+
+/* Global security control block */
+extern secCb_t secCb;
+
+/*************************************************************************************************/
+/*!
+ *  \brief  Execute the CCM-Mode encryption algorithm.
+ *
+ *  \param  pKey          Pointer to encryption key (SEC_CCM_KEY_LEN bytes).
+ *  \param  pNonce        Pointer to nonce (SEC_CCM_NONCE_LEN bytes).
+ *  \param  pPlainText    Pointer to text to encrypt.
+ *  \param  textLen       Length of pPlainText in bytes.
+ *  \param  pClear        Pointer to additional, unencrypted authentication text.
+ *  \param  clearLen      Length of pClear in bytes.
+ *  \param  micLen        Size of MIC in bytes (4, 8 or 16).
+ *  \param  pResult       Buffer to hold result (returned in complete event).
+ *  \param  handlerId     Task handler ID to receive complete event.
+ *  \param  param         Optional parameter passed in complete event.
+ *  \param  event         Event ID of complete event.
+
+ *  \return TRUE if successful, else FALSE.
+ */
+/*************************************************************************************************/
+bool_t SecCcmEnc(const uint8_t *pKey, uint8_t *pNonce, uint8_t *pPlainText, uint16_t textLen,
+                 uint8_t *pClear, uint16_t clearLen, uint8_t micLen, uint8_t *pResult,
+                 wsfHandlerId_t handlerId, uint16_t param, uint8_t event)
+{
+  secCcmEncMsg_t *pCcmMsg;
+
+  if ((pCcmMsg = WsfMsgAlloc(sizeof(secCcmEncMsg_t))) != NULL)
+  {
+    /* Encrypt. */
+    PalCryptoCcmEnc(pKey, pNonce, pPlainText, textLen, pClear, clearLen, micLen, pResult,
+                    handlerId, param, event);
+
+    memcpy(pResult, pClear, clearLen);
+
+    /* Send notification of encryption complete. */
+    pCcmMsg->hdr.status = secCb.token++;
+    pCcmMsg->hdr.param = param;
+    pCcmMsg->hdr.event = event;
+    pCcmMsg->pCiphertext = pResult;
+    pCcmMsg->textLen = textLen + clearLen + micLen;
+    WsfMsgSend(handlerId, pCcmMsg);
+
+    return TRUE;
+  }
+
+  return FALSE;
+}
+
+/*************************************************************************************************/
+/*!
+ *  \fn     SecCcmDec
+ *
+ *  \brief  Execute the CCM-Mode verify and decrypt algorithm.
+ *
+ *  \param  pKey          Pointer to encryption key (SEC_CCM_KEY_LEN bytes).
+ *  \param  pNonce        Pointer to nonce (SEC_CCM_NONCE_LEN bytes).
+ *  \param  pCypherText   Pointer to text to decrypt.
+ *  \param  textLen       Length of pCypherText in bytes.
+ *  \param  pClear        Pointer to additional, unencrypted authentication text.
+ *  \param  clearLen      Length of pClear in bytes.
+ *  \param  pMic          Pointer to authentication digest.
+ *  \param  micLen        Size of MIC in bytes (4, 8 or 16).
+ *  \param  pResult       Buffer to hold result (returned in complete event).
+ *  \param  handlerId     Task handler ID to receive complete event.
+ *  \param  param         Optional parameter passed in complete event.
+ *  \param  event         Event ID of complete event.
+ *
+ *  \return TRUE if successful, else FALSE.
+ */
+/*************************************************************************************************/
+bool_t SecCcmDec(const uint8_t *pKey, uint8_t *pNonce, uint8_t *pCypherText, uint16_t textLen,
+                 uint8_t *pClear, uint16_t clearLen, uint8_t *pMic, uint8_t micLen,
+                 uint8_t *pResult, wsfHandlerId_t handlerId, uint16_t param, uint8_t event)
+{
+  secCcmDecMsg_t *pCcmMsg;
+
+  if ((pCcmMsg = WsfMsgAlloc(sizeof(secCcmDecMsg_t))) != NULL)
+  {
+    /* Decrypt. */
+    uint32_t error;
+
+    error = PalCryptoCcmDec(pKey, pNonce, pCypherText, textLen, pClear, clearLen, pMic, micLen,
+                            pResult, handlerId, param, event);
+
+    /* Send notification of decryption complete. */
+    pCcmMsg->hdr.status = secCb.token++;
+    pCcmMsg->hdr.param = param;
+    pCcmMsg->hdr.event = event;
+
+    /* Compare MIC with computed MIC. */
+    if (error)
+    {
+      /* MIC not authentic. */
+      pCcmMsg->success = FALSE;
+      pCcmMsg->pResult = NULL;
+      pCcmMsg->pText = NULL;
+      pCcmMsg->textLen = 0;
+    }
+    else
+    {
+      /* MIC authentic. */
+      pCcmMsg->success = TRUE;
+      pCcmMsg->pResult = pResult;
+      pCcmMsg->pText = pResult;
+      pCcmMsg->textLen = textLen;
+    }
+
+    WsfMsgSend(handlerId, pCcmMsg);
+
+    return TRUE;
+  }
+
+  return  FALSE;
+
+}
+
+/*************************************************************************************************/
+/*!
+ *  \brief  Called to initialize CCM-Mode security.
+ *
+ *  \return None.
+ */
+/*************************************************************************************************/
+void SecCcmInit()
+{
+  PalCryptoInit();
+
+  secCb.hciCbackTbl[SEC_TYPE_CCM] = NULL;
+}
+
+#endif /* SEC_CCM_CFG */