[Chandrasekhar]

Hi ,

I am new to this openssl libraries.

I am facing a issue in the below code.

When I encrypt, it is giving all zeroes as output. And when I decrypt I am
not getting the exact message.

Please, I need help in this.

#define BUFSIZE             1024

 

int main(int argc, char *argv[])

{

                int i;

    unsigned char out[BUFSIZE]={0};

    unsigned char in[]={0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x00};

                for(i=0;i<8;i++)

                printf("%2X\n",in[i]);   

    cryptWrapper(in, out);

    printf("Encrypted/Decrypted string is: [%s]\n", out);

 

    return 0;

}

 

 

int cryptWrapper(unsigned char *in, unsigned char *out)

{

        unsigned char EncrOut[BUFSIZE]={0};

        unsigned char DecrOut[BUFSIZE]={0};

                int ret;

        unsigned char tdesKey1[8]
={0xEF,0x38,0xE0,0xE0,0x58,0xA7,0x08,0x8C};

        unsigned char tdesKey2[8]
={0x51,0x01,0x37,0xFE,0xBC,0xE0,0x4C,0x85};

        unsigned char initVector[8]
={0x38,0x37,0x36,0x35,0x34,0x33,0x32,0x31};        // The
initializationvector

                int i;

        des_key_schedule kSched1, kSched2;

 

        des_cblock iv;

 

        memcpy(iv,initVector,sizeof(initVector));               // set the
initialization vector

 

       ret=DES_set_key_checked(&tdesKey1, &kSched1);   

                printf("ret %d\n",ret);            // set the key schedule

        DES_set_key_checked(&tdesKey2, &kSched2);               // set the
key schedule

//        DES_set_key_checked(&tdesKey3, &kSched3);               // set the
key schedule

                

                for(i=0;i<8;i++)

                printf("%2X\n",in[i]);   

        memset(out, 0, BUFSIZE);

        des_ede2_cbc_encrypt(in, EncrOut, (long)strlen((char*)in),
kSched1,kSched2, &iv, DES_ENCRYPT);   // Encrypt

                for(i=0;i<8;i++)

                                printf("Encrypted %X\n",EncrOut[i]);

        memcpy(iv,initVector,sizeof(initVector));

 

        DES_set_key_checked(&tdesKey1, &kSched1);

        DES_set_key_checked(&tdesKey2, &kSched2);

//        DES_set_key_checked(&tdesKey3, &kSched3);

 

        des_ede2_cbc_encrypt((unsigned char*)EncrOut,
DecrOut,(long)strlen((char*)EncrOut), kSched1, kSched2, &iv,DES_DECRYPT);

                for(i=0;i<8;i++)

                                printf("Decrypted %X\n",DecrOut[i]);

 

        strcpy((char *) out, (char *) DecrOut);

 

        return 0;

}

 

 

Regards,

ChandraSekhar.