On Thu July 15 2010, Anthony Gabrielson wrote:
> Hello,
> This seems to be a pretty typical question that gets posted often. I have a
> simple example that I think hits it. Anyway, its the first entry into a blog
> that I'm starting to building up. If your interested the code and (a brief)
> explanation is available here:
>
> http://agabrielson.wordpress.com/2010/07/15/openssl-an-example-from-the-command-line/#more-4
>
>
Interesting blog.
One quick question on the first linked-to source at the top:
quote
memset(plaintext,0,sizeof(plaintext));
in_len = strlen(ciphertext);
end-quote
How did you get strlen to ignore any embedded zeros in the ciphertext?
Mike
> One note - I didn't use the ex function; I used the older version. It should
> give you a slightly easier place to start from.
>
> Anthony
>
> ----- Original Message -----
> From: "Rudy1" <[email protected]>
> To: [email protected]
> Sent: Thursday, July 15, 2010 5:37:38 AM
> Subject: AES128 CBC
>
> I'm using the openssl crypto lib first time and I don't know how to encrypt
> text larger than blocksize (16 byte) . For example I want to encrypt a string
> of size 292 bytes. I call EVP_EncryptUpdate () one time and 288 bytes will be
> encrypted and finally I call EVP_EncryptFinal_ex(). Do I really encrypt the
> whole string correctly? Or do I have to call EVP_EncryptUpdate () for every
> blocksize chunk of my string? How large is the encrypted string? I would
> expect 304 bytes (288 + 16). Is this correct? Rudy1
>
> View this message in context: AES128 CBC
> Sent from the OpenSSL - User mailing list archive at Nabble.com.
>
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