2010/7/12 Carlos Saldaña <saldana...@gmail.com>
> unsigned char encrypted[2560] = { 0 };
> int resultEncrypt = 0;
>
> resultEncrypt = RSA_public_encrypt ( strlen(text) + 1 , (unsigned char
> *)text, encrypted, rsa_rpu, RSA_PKCS1_OAEP_PADDING );
> NSLog(@"%d from encrypt.", resultEncrypt);
> //This line prints 128
> NSLog(@"encrypted message %i", (int)encrypted);
> //Here I get a large negative number (- 974687...)
>
> if (resultEncrypt == -1){
> printf("encryption failed ");
> }
> else{
> printf("Encryption success");
> }
>
I don't know ObjC, but when it doesn't deviate too much from C/C++, then the
%i (- 974687...) is you printing the address of 'encrypted' as an integer,
which can be any kind of number on any platform, and that's not exactly
informative. ;-) (Name of array variable functions as pointer/reference,
when used without the [] index brackets)
Anyway, to see the encrypted data, I'd suggest hexdumping the stuff like,
for instance, so:
printf("crypted data dump (len = %d):\n", resultEncrypt);
for (int i = 0; i < resultEncrypt; i++)
{
printf("%02X ", encrypted[i]);
}
or whatever the equivalent of that bit of C code would read in ObjC/NS.
(NSLog() ~ printf(), I take it?)
Be reminded that the encryption process can only be truly called
'successful' iff you also happen to have code (and complementary key) which
performs the /decryption/ process so that you get your original message
a.k.a. 'plaintext' back.
For that, your partners should have provided you with a key pair for testing
purposes (or you might have received directions how to roll your own keypair
in a way 100% compatible with theirs).
--
Met vriendelijke groeten / Best regards,
Ger Hobbelt
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