Hi I used the real key and IV now ,
But there is some problem in decrypting firat 16 bytes....can you tell why
is this happening...
the first 16 bytes are read properly but not gettin g decrypted??What could
be reason for this?
because of this my code is returning an error in decrypt final..

Thanks for info in advance.

Christian Hohnstaedt wrote:
> 
> Hi,
> 
> you used the ASCII representation of the key, instead of the real key.
> Same with iv.
> 
> On Tue, Nov 17, 2009 at 02:43:48AM -0800, NaGaGo wrote:
>> 
>> Hai
>> this is  the openssl shell command i'm using to decrypt a binary file...
>> openssl enc -d -K
>> 3834373532303435333730323834383132373330393233343531323330383839 -iv
>> 36363333383630393433313132323031 -aes-256-cbc-in final2.bin -out test.zip
>> As my target doesnot support openssl commd i was asked to write
>> decryption
>> code using some API's and create a binary ...so I decided to write it
>> using
>> AES API's 
>> Here is my code please tell me where I went wrong...thanks in advance.
>> int main()
>>     {
>> 
>>     unsigned long lSize;
>>     FILE * inFile;
>>     FILE * outFile;
>>     size_t n,m;
>>     char * pTemp;
>>     char * buffer;
>>     const AES_KEY *key;
>>     inFile = fopen("SB2.bin", "rb");
>>     outFile = fopen("finalPackResult", "wb+");
>>     
>>     unsigned char uKey[]=
>> "3834373532303435333730323834383132373330393233343531323330383839";
> 
> unsigned char uKey[]= "84752045370284812730923451230889";
> 
>>     unsigned char iv[] = "36363333383630393433313132323031"; 
> 
> unsigned char iv[] = "6633860943112201";
> 
> 
>>     /* get file size and allocate memory to buffer */
>>     fseek (inFile , 0,SEEK_END);
>>     lSize = ftell (inFile);
>>     rewind (inFile);
> 
> Maybe:
> 
>   struct stat st;
>   fstat(fileno(inFile), &st);
>   lSize = st.st_size;
> 
> is saner than bouncing the filepos ?
> 
>       Christian
>       
> ______________________________________________________________________
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> 
> 

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