> -----Original Message----- > From: owner-openssl-us...@openssl.org > [mailto:owner-openssl-us...@openssl.org] On Behalf Of David Schwartz > Sent: Wednesday, July 08, 2009 3:05 PM > To: openssl-users@openssl.org > Subject: RE: Need help please: calculate SHA256. > > > Bizhan Gholikhamseh wrote: > > > Hi all, > > I have an image that I need to calculate SHA256 has digest of image > > and encrypt the hash digest using my private key to generate image > > signature. > > > > Could someone please let me know how to use openssl to do this? > > 1) Calculate the SHA256 hash. > > 2) Sign it with the private key. > > If you want a more specific answer, you're going to have to > ask a more specific question.
I have a text file, let us call it test.tx, which I need to send it through a secure mechanism to a remote site. I have already created a pair of public and private rsa key using openssl. I want to use openssl to generate a sha256 hash digest of the text file, i.e. test.tx --> test.hash. And encrypt the hash file with my private key i.e. test.hash --> test.sign. I believe this process is called signing the image (I am very new in this area). Any help greatly appreciated, --B > > Are you trying to write a program? Are you trying to use the 'openssl' > application? Is there some specific image signing format > you're trying to use? Who or what is supposed to be able to > verify this signature and using what format? > > Your question is like "how can I use steel to build a > bridge". You get the steel and you form it into a bridge with tools. > > DS > > > ______________________________________________________________________ > OpenSSL Project http://www.openssl.org > User Support Mailing List openssl-users@openssl.org > Automated List Manager majord...@openssl.org > ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
