Re: seeking basic level help with cryptlib

By any chance, do you have some sample code which might help me understand
the basics of cryptlib? Probably something that just calculates a hash value
or gives an encrypted result ?

On Mon, Mar 22, 2010 at 1:47 AM, Scott Neugroschl <[email protected]>wrote:

>  On 3/21/2010 4:11 PM, uttarauk uttarauk wrote:
>
> Hi,
>       I am a beginner and just downloaded the cryptlib 3.3.3 to Ubuntu. I
> tried to compile a very basic level code to just to see if the library is
> build properly. Below is the code. It worked without errors:
>
> #include<stdio.h>
> #include "cryptlib.h"
>
> int main(void){
>         cryptInit();
>        cryptEnd();
>     return 0;
> }
>
> I then copy-pasted the sample code in the manual:
>
> #include<stdio.h>
> #include "cryptlib.h"
>
> int main(void){
>         cryptInit();
>     /* Create an envelope for the message */
>         cryptCreateEnvelope( &cryptEnvelope, cryptUser, CRYPT_FORMAT_SMIME
> );
>         /* Push in the message recipient's name */
>         cryptSetAttributeString( cryptEnvelope, CRYPT_ENVINFO_RECIPIENT,
>                                                         recipientName,
> recipientNameLength );
>         /* Push in the message data and pop out the signed and encrypted
>          result */
>         cryptPushData( cryptEnvelope, message, messageSize, &bytesIn );
>         cryptFlushData( cryptEnvelope );
>         cryptPopData( cryptEnvelope, encryptedMessage, encryptedSize,
>                                  &bytesOut );
>         /* Clean up */
>         cryptDestroyEnvelope( cryptEnvelope );
>         cryptEnd();
>     return 0;
> }
>
>  Well, you *do* need to *declare* your variables.
>
> This gives several errors like:
>
> test1.c: In function ‘main’:
> test1.c:15: error: ‘cryptEnvelope’ undeclared (first use in this function)
> test1.c:15: error: (Each undeclared identifier is reported only once
> test1.c:15: error: for each function it appears in.)
> test1.c:15: error: ‘cryptUser’ undeclared (first use in this function)
> test1.c:18: error: ‘recipientName’ undeclared (first use in this function)
> test1.c: error: ‘recipientNameLength’ undeclared (first use in this
> function)
> test1.c: error: ‘message’ undeclared (first use in this function)
> test1.c:21: error: ‘messageSize’ undeclared (first use in this function)
> test1.c:21: error: ‘bytesIn’ undeclared (first use in this function)
> test1.c:23: error: ‘encryptedMessage’ undeclared (first use in this
> function)
> test1.c:23: error: ‘encryptedSize’ undeclared (first use in this function)
> test1.c:24: error: ‘bytesOut’ undeclared (first use in this function)
>
> It clearly is asking for the values of the variables. Could someone please
> help me understand what I must do to get this working. If someone has sample
> codes, it would be great if you could share.
>
>
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