On Mon, Jan 19, 2009 at 1:48 PM, Young, Alistair <alistair.yo...@logica.com> wrote: > Hello, > > Using the OpenSSL command line, is it possible to compute hashes of data > which is not a whole number of bytes in length? For example, a block of > data consisting of (say) 110 bits? > > Padding the data is not an option, because we need to be able to verify > hashes which have been computed externally. > > If this is not an option from the command line, can it be achieved > through use of the OpenSSL APIs?
Since all [supported] secure hash algorithms are byte, pardon, *word*-based, the mere definition of those algorithms precludes the possiblity of hashing 110 bit data bursts without any [bit-]padding. Here, 'word' size depends on the secure hash algorithm used. So the oversimplified answer is: no can do. Given that you don't ask whether particular bit-data-stream oriented secure hash algorithm XYZ is supported by OpenSSL, while it's not listed in the feature set, I have a question in return: are you sure you are ware what you are asking here? If yes, please specify required hash algorithm and other specifics and we might be able to help you out. -- Met vriendelijke groeten / Best regards, Ger Hobbelt -------------------------------------------------- web: http://www.hobbelt.com/ http://www.hebbut.net/ mail: g...@hobbelt.com mobile: +31-6-11 120 978 -------------------------------------------------- ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
