Dr. Stephen, Thanks
> -----Original Message----- > From: owner-openssl-us...@openssl.org > [mailto:owner-openssl-us...@openssl.org] On Behalf Of Dr. > Stephen Henson > Sent: Wednesday, July 08, 2009 3:18 PM > To: openssl-users@openssl.org > Subject: Re: Need help please: calculate SHA256. > > On Wed, Jul 08, 2009, Bizhan Gholikhamseh (bgholikh) wrote: > > > > > > > > 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 > > > > Here is the requirement I need to address: > > "Please sign your text message using RSASSA-PKCS1-v1_5 as defined by > > PKCS#1 v2.1 specification using SHA256 hash algorithm. > Please treat > > your text message as a big endian byte stream." > > > > I hope this clarify the question I am trying to find answer for. > > > > Try: > > openssl dgst -sha256 -sign privkey.pem -out sig.bin textfile.txt > > where "privkey.pem" is the private key, "textfile.txt" is > whatever message you are signing and it should produce the > file sig.bin with the signature included. > > Steve. > -- > Dr Stephen N. Henson. OpenSSL project core developer. > Commercial tech support now available see: > http://www.openssl.org > ______________________________________________________________________ > 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
