Question

I am lost in the underworld of pointers! Here is my problem,

It is very quirky and I can only control one of the functions so please don’t say I need to redesign.
This is being compiled in Linux Ubuntu 11.04 using android-ndkr7. It is a purely native application (or service) that will run on an android phone. I am using google test to verify my class/functions.
The first function (my test class) has to declare the unsigned char*, it passes it to the 2nd function to be used as output (crypt::encryptBuffer), encrypt takes the declared variable, allocates memory for it and passes it to a third function which is where the value is being placed into it as output.

Crypt.h

class Crypt
{
public:

   Crypt();
   ~Crypt();

   bool encryptBuffer(const unsigned char* inDecryptBuffer, const int inputSize, unsigned char** outEncryptBuffer, int*  pOutSize);

};

#endif

Crypt.cpp

#include "Crypt.h"
#include "pan/crypt.h"

static unsigned char HydraEncryptionKey[] = {0x17, 0x43, 0x9B, 0x55, 0x07, 0xAE, 0x73, 0xB1, 0x32, 0x10, 0xE0, 0x22, 0xD9, 0xC7, 0xF2, 0x3B};

bool AccCrypt::encryptBuffer(const unsigned char* inDecryptBuffer, const int inputSize, unsigned char** outEncryptBuffer, int*  pOutSize)
{
    int encryptedSize;
    pan::aes128_cbc enc(HydraEncryptionKey);

    // see how long the encrypted data will be and allocate space for the data
    encryptedSize = enc.output_len( inputSize );

    *outEncryptBuffer = (unsigned char*)malloc(encryptedSize + 4);

    enc.encrypt(inDecryptBuffer, *outEncryptBuffer, inputSize );
    return true;
}

CryptTest.cpp

#incude "Crypt.h"
#include <gtest/gtest.h>

#define CHECK_COND(X, a, b, c) { \
if(X) \
{ \
    printf("FAIL: %s\n", c); \
    printf("Press any key to continue");\
    getc(stdin);\
}\
else \
{ \
    printf("PASS: %s\n", c); \
}\
}

#define EXPECT_EQ(a,b,c)  CHECK_COND((a != b), a, b, c)

const char* decBuff = "something";
const int inputSize = 10;
unsigned char* encBuffTest = NULL;
int pOutsize = 0;

class cryptTester : public testing::Test
{
    protected:
    virtual void SetUp()
    {
        cryptTest = new Crypt();
        cryptTest->encryptBuffer((const unsigned char*)decBuff, inputSize, &encBuffTest, &pOutsize);
    }

    virtual void TearDown()
    {
    }

    Crypt* cryptTest;

};
TEST_F(AccCryptTest, decryptBuffer)
{
    int poutSize = 0;
    EXPECT_EQ(true, accCryptTest->decryptBuffer((const unsigned char*)encBuffTest, pOutsize, &outDecryptBuffTest, &poutSize), "decryptBuffer(valid, valid)");

}

This will compile fine, however when I run it on the phone I get a segmentation fault. I cannot figure out where this is happening as I have not been able to setup debugging correctly from the adb shell.

Any help would be appreciated!

Answer 1

Your code seems ok, maybe the error is in the encrypt method:

enc.encrypt(inDecryptBuffer, *outEncryptBuffer, inputSize );