CC2538: Encrypted Data Transfer over Zigbee Stopping the device

Raghunandana DS

Part Number: CC2538

Hi,

I am using CC2538 with IAR7.70.2, I am using the existing cluster of the Zigbee3.0 "Sample-Switch-OTA-Dongle-ImageA-with BootLoader"
I am successfully transmitting the character string of length up to 82 bytes between any devices in the network, the same I trying to send the CCM Encrypted data but this time sent device is stopped, before stopping many times getting "afStatus_MEM_FAIL" status.

Sending by "AF_DataRequest" call

CCM-Encryption following exact way as like driver example projects of the foundation firmware.

Thank you.

over 8 years ago

0 YiKai Chen over 8 years ago

Guru 735695 points

How many bytes do you send in one call to AF_DataRequest?

0 Raghunandana DS over 8 years ago in reply to YiKai Chen

Mastermind 6385 points

Maximum 64 bytes sending.
Thank you

0 YiKai Chen over 8 years ago in reply to Raghunandana DS

Guru 735695 points

Do you keep sending messages in very short period?

0 Raghunandana DS over 8 years ago in reply to YiKai Chen

Mastermind 6385 points

Every 1 minute frequently .
Thank you

0 YiKai Chen over 8 years ago in reply to Raghunandana DS

Guru 735695 points

Check if you allocate memory and don't release in your application.

0 Raghunandana DS over 8 years ago in reply to YiKai Chen

Mastermind 6385 points

All the places I am doing osal_mem_free() after use, for confirmation I will check once again at all the place
Thank you

0 Raghunandana DS over 8 years ago in reply to Raghunandana DS

Mastermind 6385 points

If I send the same data without encrypt everything working fine . So, I got confused why its stopping for encrypted Data.

0 YiKai Chen over 8 years ago in reply to Raghunandana DS

Guru 735695 points

Run out of idea.

0 Raghunandana DS over 8 years ago in reply to YiKai Chen

Mastermind 6385 points

Hi Chen I found in many ways, Stack is not making me problem only Encryption and decryption only making me the problem.

I am making the encrypt and decrypt as below:

uint8* get_CCM_Encrypted_Data(uint8 *Data)
{
  CCMEncryptStruct sCCMEncryptExample =
  {// example case len_a and Mval = 0
    // encrypt
    true,
    // key
    {"koga43kogblm[dog"},
    // Mval
    0x00,
    // N Nonce
    //        { 0x00, 0x00, 0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0,
    //        0x00, 0x00, 0x00, 0x00, 0x05 },
    {"4g8s2hj8,.5g6"},
    // A
    { 0x69, 0x98, 0x03, 0x33, 0x63, 0xbb, 0xaa, 0x01,
    0x00, 0x0d, 0x00, 0x00, 0x00, 0x00, 0x03},
    // M message
    Data,    //{"0123456789ABCDEFGHIJ"},
    // len_m
    strlen(Data),      //0x14,
    // len_a
    0x00,
    // key location
    0,
    // mic
    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
    //        {".,<>;':|"},
    // Lval
    2,
    false,
    { 0x92, 0xe8, 0xad, 0xca, 0x53, 0x81, 0xbf, 0xd0,
    0x5b, 0xdd, 0xf3, 0x61, 0x09, 0x09, 0x82, 0xe6, 0x2c,
    0x61, 0x01, 0x4e, 0x7b, 0x34, 0x4f, 0x09}
  };
  
  uint8 *Res = CCMEncrypt(sCCMEncryptExample.ui8CCMEncrypt,
                          sCCMEncryptExample.ui8CCMkey,
                          sCCMEncryptExample.ui8CCMMval,
                          sCCMEncryptExample.ui8CCMN,
                          sCCMEncryptExample.ui8CCMM,
                          sCCMEncryptExample.ui16CCMLenM,
                          sCCMEncryptExample.ui8CCMA,
                          sCCMEncryptExample.ui16CCMLenA,
                          sCCMEncryptExample.ui8CCMKeyLocation,
                          sCCMEncryptExample.ui8CCMCstate,
                          sCCMEncryptExample.ui8CCMCCMLVal,
                          sCCMEncryptExample.ui8CCMIntEnable,
                          sCCMEncryptExample.ui8CCMExpectedOutput);
  
  return Res;
}



uint8* get_CCM_Decrypted_Data(uint8 *Data)
{
  CCMDecryptStruct sCCMDecryptExample =
  { // example case len_a and Mval = 0
    // decrypt
    true,
    // key
    {"koga43kogblm[dog"},
    // Mval
    0x0,
    // N Nonce
    {"4g8s2hj8,.5g6"},
    // A
    { 0x69, 0x98, 0x03, 0x33, 0x63, 0xbb, 0xaa, 0x01,
    0x00, 0x0d, 0x00, 0x00, 0x00, 0x00, 0x03},
    // C encrypted message
    //        { 0x92, 0xe8, 0xad, 0xca, 0x53, 0x81, 0xbf, 0xd0,
    //        0x5b, 0xdd, 0xf3, 0x61, 0x09, 0x09, 0x82, 0xe6, 0x2c,
    //        0x61, 0x01, 0x4e, 0x7b, 0x34, 0x4f, 0x09},
    Data,       //{"¶s$ùgµ‹ägá´$BDÍ«g$F"},
    // len_c
    strlen(Data),           //20,
    // len_a
    0x0,
    // key location
    0,
    // mic
    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
    // Lval
    2,
    false,
    { 0x14, 0xaa, 0xbb, 0x00, 0x00, 0x01, 0x02, 0x03,
    0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
    0x0c, 0x0d, 0x0e, 0x0f }
  };
  
  uint8 *Res = CCMDecrypt(sCCMDecryptExample.ui8CCMDecrypt,
                          sCCMDecryptExample.ui8CCMKey,
                          sCCMDecryptExample.ui8CCMMval,
                          sCCMDecryptExample.ui8CCMN,
                          sCCMDecryptExample.ui8CCMC,
                          sCCMDecryptExample.ui16CCMLenC,
                          sCCMDecryptExample.ui8CCMA,
                          sCCMDecryptExample.ui16CCMLenA,
                          sCCMDecryptExample.ui8CCMKeyLocation,
                          sCCMDecryptExample.ui8CCMCstate,
                          sCCMDecryptExample.ui8CCMLVal,
                          sCCMDecryptExample.ui8CCMIntEnable,
                          sCCMDecryptExample.ui8CCMExpectedOutput);
  
  return Res;
}

followed by the attached source for CCMDecrypt and CCMEncrypt call

Thank you

Fullscreen aes_ccm.c Download

/******************************************************************************
*  Filename:       aes_ccm.c
* 
*
*  Description:    AES CCM access example for CC2538 on SmartRF06EB. This 
*                  example shows how CCM should be used. The example also 
*                  verifies the CCM functionality.
*
*  
******************************************************************************/

#include "aes_ccm.h"
#include "aes.h"
#include "ccm.h"
#include <string.h>
#include "sys_ctrl.h"


/*********************************************************************
* LOCAL FUNCTIONS
*/ 
static bool CCMMemCmp(const uint8_t *pui8Src1, const uint8_t *pui8Src2, 
               uint32_t ui32Len );

static void CCMIntHandler(void);

/*
//
// ccm No encryption authentication only example structure
//
typedef struct
{
    uint8_t ui8CCMEncrypt;
    uint8_t ui8CCMkey[16];            // array to hold the Key
    uint8_t ui8CCMMval;               // length of authentication
    uint8_t ui8CCMN[13];              // Nonce
    uint8_t ui8CCMA[26];              // Additional data
    uint8_t ui8CCMM[8];               // input message
    uint16_t ui16CCMLenM;             // length of message
    uint16_t ui16CCMLenA;             // length of additional data
    uint8_t ui8CCMKeyLocation;        // location in Key RAM
    uint8_t ui8CCMCstate[8];          // authentication Tag
    uint8_t ui8CCMCCMLVal;            //  Lval for ccm
    uint8_t ui8CCMIntEnable;          // set to true to enable interrupts
    // and false to disable
    uint8_t ui8CCMExpectedOutput[8];  // reference output
} tCCMNoencryptExample;

//
// ccm No decryption authentication only example structure
//
typedef struct
{
    uint8_t ui8CCMDecrypt;
    uint8_t ui8CCMKey[16];             // array to hold the Key
    uint8_t ui8CCMMval;                // length of authentication
    uint8_t ui8CCMN[13];               // Nonce
    uint8_t ui8CCMA[26];               // Additional data
    uint8_t ui8CCMC[8];                // input encrypted message
    uint16_t ui16CCMLenC;              // length of encrypted message
    uint16_t ui16CCMLenA;              // length of additional data
    uint8_t ui8CCMKeyLocation;         // location in Key RAM
    uint8_t ui8CCMCstate[8];           // authentication Tag
    uint8_t ui8CCMLVal;                // Lval for ccm
    uint8_t ui8CCMIntEnable;           // set to true to enable interrupts
    // and false to disable
    uint8_t ui8CCMExpectedOutput[20];  // reference output
} tCCMNodecryptExample;
*/

CCMDecryptStruct sCCMDecryptExample[] =
{
    { // example case len_a and Mval = 0
        // decrypt
        true,
        // key
        { 0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
        // Mval
        0x0,
        // N Nonce
        { 0x00, 0x00, 0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0,
        0x00, 0x00, 0x00, 0x00, 0x05 },
        // A
        { 0x69, 0x98, 0x03, 0x33, 0x63, 0xbb, 0xaa, 0x01,
        0x00, 0x0d, 0x00, 0x00, 0x00, 0x00, 0x03},
        // C encrypted message
//        { 0x92, 0xe8, 0xad, 0xca, 0x53, 0x81, 0xbf, 0xd0,
//        0x5b, 0xdd, 0xf3, 0x61, 0x09, 0x09, 0x82, 0xe6, 0x2c,
//        0x61, 0x01, 0x4e, 0x7b, 0x34, 0x4f, 0x09},
        {"�s$�g���g�$BDͫg$F"},
        // len_c
        20,
        // len_a
        0x0,
        // key location
        0,
        // mic
        { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
        // Lval
        2,
        false,
        { 0x14, 0xaa, 0xbb, 0x00, 0x00, 0x01, 0x02, 0x03,
        0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
        0x0c, 0x0d, 0x0e, 0x0f }
    }
};
/*
tCCMNodecryptExample sCCMNodecryptExample[] =
{
    { // example case No decrypt
        // encrypt
        false,
        // key
        {0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
        0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF},
        // Mval
        0x0,
        // N Nonce
        {0xAC, 0xDE, 0x48, 0x00, 0x00, 0x00, 0x00, 0x01,
        0x00, 0x00, 0x00, 0x05, 0x02},
        // Header
        { 0x08, 0xD0, 0x84, 0x21, 0x43, 0x01, 0x00, 0x00,
        0x00, 0x00, 0x48, 0xDE, 0xAC, 0x02, 0x05, 0x00,
        0x00, 0x00, 0x55, 0xCF, 0x00, 0x00, 0x51, 0x52,
        0x53, 0x54},
        // Payload
        {0x22, 0x3B, 0xC1, 0xEC, 0x84, 0x1A, 0xB5, 0x53},
        // len_c
        8,
        // len_a
        26,
        // key location
        0,
        // mic
        { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
        // Lval
        2,
        false,
        {0x22, 0x3B, 0xC1, 0xEC, 0x84, 0x1A, 0xB5, 0x53 }
    }
};

tCCMNoencryptExample sCCMNoencryptExample[] =
{
    { // example case No encrypt
        // encrypt
        false,
        // key
        {0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
        0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF},
        // Mval
        0x0,
        // N Nonce
        {0xAC, 0xDE, 0x48, 0x00, 0x00, 0x00, 0x00, 0x01,
        0x00, 0x00, 0x00, 0x05, 0x02},
        // Header
        { 0x08, 0xD0, 0x84, 0x21, 0x43, 0x01, 0x00, 0x00,
        0x00, 0x00, 0x48, 0xDE, 0xAC, 0x02, 0x05, 0x00,
        0x00, 0x00, 0x55, 0xCF, 0x00, 0x00, 0x51, 0x52,
        0x53, 0x54},
        // Payload
        {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
        // len_m
        0,
        // len_a
        26,
        // key location
        0,
        // mic
        { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
        // Lval
        2,
        false,
        { 0x22, 0x3B, 0xC1, 0xEC, 0x84, 0x1A, 0xB5, 0x53}
    }
};
*/
CCMEncryptStruct sCCMEncryptExample[] =
{
    { // example case len_a and Mval = 0
        // encrypt
        true,
        // key
        {"koga43kogblm[dogklg,prae bfx;8.&"},
        // Mval
        0x00,
        // N Nonce
//        { 0x00, 0x00, 0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0,
//        0x00, 0x00, 0x00, 0x00, 0x05 },
        {"4g8s2hj8,.5g6"},
        // A
        { 0x69, 0x98, 0x03, 0x33, 0x63, 0xbb, 0xaa, 0x01,
        0x00, 0x0d, 0x00, 0x00, 0x00, 0x00, 0x03},
        // M message
        {"0123456789ABCDEFGHIJ"},
        // len_m
        0x14,
        // len_a
        0x00,
        // key location
        0,
        // mic
        { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
//        {".,<>;':|"},
        // Lval
        2,
        false,
        { 0x92, 0xe8, 0xad, 0xca, 0x53, 0x81, 0xbf, 0xd0,
        0x5b, 0xdd, 0xf3, 0x61, 0x09, 0x09, 0x82, 0xe6, 0x2c,
        0x61, 0x01, 0x4e, 0x7b, 0x34, 0x4f, 0x09}
    }
};

//*****************************************************************************
//
// Variables to syncronize with interrupt handler
//
//*****************************************************************************
static uint8_t volatile ui8AESECBIntHandler = 0;
static uint8_t volatile ui8CCMIntHandler = 0;

//*****************************************************************************
//
// Compare buffers
//
// param   pui8Src1       pointer to input buffer
// param   pui8Src2       pointer to buffer to compare with
// param   ui32Len        length in bytes
//
// return  true if buffers match and false if they don't
//
//*****************************************************************************
bool CCMMemCmp(const uint8_t *pui8Src1, const uint8_t *pui8Src2, 
               uint32_t ui32Len )
{
    const uint8_t *pui8Src1Temp;
    const uint8_t *pui8Src2Temp;
    
    pui8Src1Temp = pui8Src1;
    pui8Src2Temp = pui8Src2;
    
    while ( ui32Len-- )
    {
        if( *pui8Src1Temp++ != *pui8Src2Temp++ )
            return (false);
    }
    return (true);
}

//*****************************************************************************
//
// Interrupt handler for CCM
//
// param   None
//
// return  None
//
//*****************************************************************************
void CCMIntHandler(void)
{
    switch (g_ui8CurrentAESOp)
    {
    case AES_ECB:
        ui8AESECBIntHandler = 1;
        // clear interrupts
        HWREG(AES_CTRL_INT_CLR) = 0x00000003;
        break;
        
    case AES_NONE:
        break;
        
    case AES_CCM:
        ui8CCMIntHandler = 1;
        // clear interrupts
        HWREG(AES_CTRL_INT_CLR) = 0x00000003;
        break;
        
    case AES_SHA256:
        break;
        
    case AES_KEYL0AD:
        break;
    }
}

//*****************************************************************************
//
// AES-CCM encrypt 
//
// param   bEncrypt           if set to true run encryption  
// param   pui8Key            pointer to Key
// param   ui8Mval            length of authentication
// param   pui8N              Nonce
// param   pui8M              input message
// param   ui16LenM           length of message
// param   pui8A              Additional data
// param   ui16LenA           length of additional data
// param   ui8KeyLocation     location in Key RAM. Must be one of
//                            the following:
//                            KEY_AREA_0
//                            KEY_AREA_1
//                            KEY_AREA_2
//                            KEY_AREA_3
//                            KEY_AREA_4
//                            KEY_AREA_5
//                            KEY_AREA_6
//                            KEY_AREA_7
// param   ui8CCMLVal         Lval for ccm
// param   ui8CCMIntEnable    set to true to enable interrupts and false to disable
// param   pui8ExpectedOutput pointer to expected output
// param   pui8Cstate         authentication tag
// param   ui8CCMIntEnable    set true/false to enable/disable interrupts
// param   pui8ExpectedOutput pointer to Expected Output
//
// return  AES_SUCCESS if successful
//
//*****************************************************************************
uint8_t *CCMEncrypt(bool bEncrypt,
                          uint8_t* pui8Key,
                          uint8_t ui8Mval,
                          uint8_t *pui8N,
                          uint8_t *pui8M,
                          uint16_t ui16LenM,
                          uint8_t *pui8A,
                          uint16_t ui16LenA,
                          uint8_t ui8KeyLocation,
                          uint8_t *pui8Cstate,
                          uint8_t ui8CCMLVal,
                          uint8_t ui8CCMIntEnable,
                          uint8_t *pui8ExpectedOutput)
{
    uint8_t status;
//    printf("\nME=");
//    for(int i=0; i<sCCMEncryptExample[0].ui16CCMLenM; i++){
//    printf("%c", pui8M[i]);
//    }
//    printf("\n");
    
    if(ui8CCMIntEnable)
    {
        //
        // Register AES interrupt
        //
        IntRegister(INT_AES, CCMIntHandler);
        
        //
        // example using interrupt service routine
        //
        if((status = AESLoadKey((uint8_t*)pui8Key, ui8KeyLocation)) != 
           AES_SUCCESS)
        {
            return &status;
        }
        
        if((status = CCMAuthEncryptStart (bEncrypt, ui8Mval, pui8N, pui8M, 
                                          ui16LenM, pui8A, ui16LenA,
                                          ui8KeyLocation, pui8Cstate, 
                                          ui8CCMLVal, ui8CCMIntEnable)) 
           != AES_SUCCESS)
        {
            return &status;
        }
        
        //
        // wait for completion of the operation
        //
        do
        {
            ASM_NOP;
        }while(ui8CCMIntHandler == 0 ); 
        
        ui8CCMIntHandler = 0;
        
        if((status = CCMAuthEncryptGetResult(ui8Mval, ui16LenM, pui8Cstate)) 
           != AES_SUCCESS)
        {
            return &status;
        }
    }
    else
    {
        //
        // Unregister AES interrupt
        //
        IntUnregister(INT_AES);
        
        // 
        // example using polling
        //
        if((status = AESLoadKey((uint8_t*)pui8Key, ui8KeyLocation)) 
           != AES_SUCCESS)
        {
            return &status;
        }
        if((status = CCMAuthEncryptStart(bEncrypt, ui8Mval, pui8N, pui8M, 
                                          ui16LenM, pui8A, ui16LenA,
                                          ui8KeyLocation, pui8Cstate, 
                                          ui8CCMLVal, ui8CCMIntEnable)) 
           != AES_SUCCESS)
        {
            return &status;
        }
        
        //
        // wait for completion of the operation
        //
        do
        {
            ASM_NOP;
        }while(!(CCMAuthEncryptCheckResult()));
        
        
        if((status = CCMAuthEncryptGetResult(ui8Mval, ui16LenM, pui8Cstate)) != 
           AES_SUCCESS)
        {
            return &status;
        }
    }
   /* 
    if (CCMMemCmp(pui8M,  (uint8_t const *)pui8ExpectedOutput, ui16LenM) == 
        false)
    {
        return AES_CCM_TEST_ERROR;
    }
    
    //
    // Verify CCM output
    //
    if(bEncrypt)
    {
        if (CCMMemCmp(pui8Cstate, (uint8_t const *)pui8ExpectedOutput + 
                      ui16LenM, ui8Mval) == false)
        {
            return AES_CCM_TEST_ERROR;
        }
    }
    else
    {
        if (CCMMemCmp(pui8Cstate, (uint8_t const *)pui8ExpectedOutput,
                      ui8Mval) == false)
        {
            return AES_CCM_TEST_ERROR;
        }
    }
    */
    
//    printf("\nEM=");
//    for(int i=0; i<sCCMEncryptExample[0].ui16CCMLenM; i++){
//    printf("%c", pui8M[i]);
//    }
//    printf("\n");
//    return AES_SUCCESS;
    return pui8M;
}

//*****************************************************************************
//
// brief   AES-CCM decrypt 
//
// param   bDecrypt           if set to true run decryption
// param   pui8Key            pointer to Key
// param   ui8Mval            length of authentication
// param   pui8N              Nonce
// param   C                  input encrypted message
// param   ui16LenC           length of message
// param   pui8A              Additional data
// param   ui16LenA           length of additional data
// param   ui8KeyLocation     location in Key RAM. Must be one of
//                            the following:
//                            KEY_AREA_0
//                            KEY_AREA_1
//                            KEY_AREA_2
//                            KEY_AREA_3
//                            KEY_AREA_4
//                            KEY_AREA_5
//                            KEY_AREA_6
//                            KEY_AREA_7
// param   ui8CCMLVal         Lval for ccm
// param   ui8CCMIntEnable    set to true to enable interrupts and false to 
//                            disable
// param   pui8ExpectedOutput pointer to expected output
// param   pui8Cstate         authentication Tag
// param   ui8CCMIntEnable    set true/false to enable/disable interrupts
// param   pui8ExpectedOutput pointer to Expected Output
//
//return  AES_SUCCESS if successful
//
//*****************************************************************************
uint8_t *CCMDecrypt(bool bDecrypt,
                              uint8_t* pui8Key,
                              uint8_t ui8Mval,
                              uint8_t *pui8N,
                              uint8_t *pui8C,
                              uint16_t ui16LenC,
                              uint8_t *pui8A,
                              uint16_t ui16LenA,
                              uint8_t ui8KeyLocation,
                              uint8_t *pui8Cstate,
                              uint8_t ui8CCMLVal,
                              uint8_t ui8CCMIntEnable,
                              uint8_t *pui8ExpectedOutput)
{
    uint8_t status;
//    printf("\nMD=");
//    for(int i=0; i<sCCMDecryptExample[0].ui16CCMLenC; i++){
//    printf("%c", pui8C[i]);
//    }
//    printf("\n");
    if(ui8CCMIntEnable)
    {    
        //
        // example using interrupt service routine
        //
        if((status = AESLoadKey((uint8_t*)pui8Key, ui8KeyLocation)) != 
           AES_SUCCESS)
        {
            return &status;
        }
        
        if((status = CCMInvAuthDecryptStart(bDecrypt, ui8Mval, pui8N, pui8C, 
                                            ui16LenC, pui8A, ui16LenA,
                                            ui8KeyLocation, pui8Cstate,
                                            ui8CCMLVal, ui8CCMIntEnable)) != 
           AES_SUCCESS)
        {
            return &status;
        }
        
        //
        // wait for completion of the operation
        //
        do
        {
            ASM_NOP;
        }while(ui8CCMIntHandler == 0);
        
        ui8CCMIntHandler = 0;
        
        if((status = CCMInvAuthDecryptGetResult(ui8Mval, pui8C, ui16LenC, 
                                                pui8Cstate)) != AES_SUCCESS)
        {
            return &status;
        }
    } 
    else
    {
        //
        // example using polling
        //
        if((status = AESLoadKey((uint8_t*)pui8Key, 
                                ui8KeyLocation)) != AES_SUCCESS)
        {
            return &status;
        }
        if((status = CCMInvAuthDecryptStart(bDecrypt, ui8Mval, pui8N, pui8C, 
                                            ui16LenC, pui8A, ui16LenA, 
                                            ui8KeyLocation, pui8Cstate, 
                                            ui8CCMLVal, 
                                            ui8CCMIntEnable))!= AES_SUCCESS )
        {
            return &status;
        }
        
        //
        // wait for completion of the operation
        //
        do
        {
            ASM_NOP;
        }while(!(CCMInvAuthDecryptCheckResult()));
        
        if((status = CCMInvAuthDecryptGetResult(ui8Mval, pui8C, ui16LenC, 
                                                pui8Cstate)) != AES_SUCCESS)
        {
            return &status;
        }
    }
    
   /* //
    // Verify CCM output
    //
    if (CCMMemCmp(pui8C,  (uint8_t const *)pui8ExpectedOutput, 
                  (ui16LenC-ui8Mval)) == false)
    {
        return AES_CCM_TEST_ERROR;
    }*/
//    printf("\nDM=");
//    for(int i=0; i<sCCMDecryptExample[0].ui16CCMLenC; i++){
//    printf("%c", pui8C[i]);
//    }
//    printf("\n");
//    return AES_SUCCESS;
    
    return pui8C;
}

//*****************************************************************************
//
// Main function to enable AES
//
//*****************************************************************************
void enable_AES()
{
    uint8_t status;
   
    //
    // Enable AES peripheral
    //
    SysCtrlPeripheralReset(SYS_CTRL_PERIPH_AES);
    SysCtrlPeripheralEnable(SYS_CTRL_PERIPH_AES);
    
    //
    // Register AES interrupt
    //
    IntRegister(INT_AES, CCMIntHandler);
    
    //
    // Enable global interrupts
    //
    IntAltMapEnable();
    IntMasterEnable();
    
    /*
    for(uint8_t i = 0; i < sizeof(sCCMNodecryptExample)/
        sizeof(sCCMNodecryptExample[0] ); i++)
    {
        //
        // Run and Verify CCM Inverse Authentication only
        //
        status = CCMDecrypt(sCCMNodecryptExample[i].ui8CCMDecrypt,
                                    sCCMNodecryptExample[i].ui8CCMKey,
                                    sCCMNodecryptExample[i].ui8CCMMval,
                                    sCCMNodecryptExample[i].ui8CCMN,
                                    sCCMNodecryptExample[i].ui8CCMC,
                                    sCCMNodecryptExample[i].ui16CCMLenC,
                                    sCCMNodecryptExample[i].ui8CCMA,
                                    sCCMNodecryptExample[i].ui16CCMLenA,
                                    sCCMNodecryptExample[i].ui8CCMKeyLocation,
                                    sCCMNodecryptExample[i].ui8CCMCstate,
                                    sCCMNodecryptExample[i].ui8CCMLVal,
                                    sCCMNodecryptExample[i].ui8CCMIntEnable,
                                    sCCMNodecryptExample[i].
                                        ui8CCMExpectedOutput);
        if(status != AES_SUCCESS)
        {
            while(1)
            {
                //
                // AES CCM failed
                //
            }
        }
    }
    */
    
    /*
    for(uint8_t i = 0; i < sizeof(sCCMNoencryptExample)/
        sizeof(sCCMNoencryptExample[0] ); i++)
    {
        //
        // Run and Verify CCM Authentication only
        //
        status = CCMEncrypt(sCCMNoencryptExample[i].ui8CCMEncrypt,
                                      sCCMNoencryptExample[i].ui8CCMkey,
                                      sCCMNoencryptExample[i].ui8CCMMval,
                                      sCCMNoencryptExample[i].ui8CCMN,
                                      sCCMNoencryptExample[i].ui8CCMM,
                                      sCCMNoencryptExample[i].ui16CCMLenM,
                                      sCCMNoencryptExample[i].ui8CCMA,
                                      sCCMNoencryptExample[i].ui16CCMLenA,
                                      sCCMNoencryptExample[i].ui8CCMKeyLocation,
                                      sCCMNoencryptExample[i].ui8CCMCstate,
                                      sCCMNoencryptExample[i].ui8CCMCCMLVal,
                                      sCCMNoencryptExample[i].ui8CCMIntEnable,
                                      sCCMNoencryptExample[i].
                                          ui8CCMExpectedOutput);
        if(status != AES_SUCCESS)
        {
            while(1)
            {
                //
                // AES CCM failed
                //
            }
        }
    }
    */
    
    /*
    for(uint8_t i = 0; i < sizeof(sCCMEncryptExample)/
        sizeof(sCCMEncryptExample[0] ); i++)
    {
        //
        // Run and Verify CCM Authentication + Encryption
        //
        status = CCMEncrypt(sCCMEncryptExample[i].ui8CCMEncrypt,
                                      sCCMEncryptExample[i].ui8CCMkey,
                                      sCCMEncryptExample[i].ui8CCMMval,
                                      sCCMEncryptExample[i].ui8CCMN,
                                      sCCMEncryptExample[i].ui8CCMM,
                                      sCCMEncryptExample[i].ui16CCMLenM,
                                      sCCMEncryptExample[i].ui8CCMA,
                                      sCCMEncryptExample[i].ui16CCMLenA,
                                      sCCMEncryptExample[i].ui8CCMKeyLocation,
                                      sCCMEncryptExample[i].ui8CCMCstate,
                                      sCCMEncryptExample[i].ui8CCMCCMLVal,
                                      sCCMEncryptExample[i].ui8CCMIntEnable,
                                      sCCMEncryptExample[i].
                                          ui8CCMExpectedOutput);
        if(status != AES_SUCCESS)
        {
          // Return Fail //
        }
    }
    */
    
  /*  
    for(uint8_t i = 0; i < sizeof(sCCMDecryptExample)/
        sizeof(sCCMDecryptExample[0] ); i++)
    {
        //
        // Run and Verify CCM Inverse Authentication + Decryption
        //
        status = CCMDecrypt(sCCMDecryptExample[i].ui8CCMDecrypt,
                                    sCCMDecryptExample[i].ui8CCMKey,
                                    sCCMDecryptExample[i].ui8CCMMval,
                                    sCCMDecryptExample[i].ui8CCMN,
                                    sCCMDecryptExample[i].ui8CCMC,
                                    sCCMDecryptExample[i].ui16CCMLenC,
                                    sCCMDecryptExample[i].ui8CCMA,
                                    sCCMDecryptExample[i].ui16CCMLenA,
                                    sCCMDecryptExample[i].ui8CCMKeyLocation,
                                    sCCMDecryptExample[i].ui8CCMCstate,
                                    sCCMDecryptExample[i].ui8CCMLVal,
                                    sCCMDecryptExample[i].ui8CCMIntEnable,
                                    sCCMDecryptExample[i].
                                        ui8CCMExpectedOutput);
        if(status != AES_SUCCESS)
        {
          // Return Fail //
        }
    }
    */
   
}

0 Raghunandana DS over 8 years ago in reply to Raghunandana DS

Mastermind 6385 points

Hi Chen, please give any suggestions to my issue.
Thank you.

0 YiKai Chen over 8 years ago in reply to Raghunandana DS

Guru 735695 points

Cannot help much on this topic. Since you know the problem is on CCM, I suggest you to trace and debug where your problem is.

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