On Tue, Dec 14, 2004, Andrus wrote: > I need to decrypt RSA signature using RSA public key. > Thanks to Nils Larsch reply I discovered that the following command can be > used for this: > > openssl rsautl -verify -in sig.bin -inkey public.der -pubin -keyform > DER -out signout.bin > > I have a RSA 1024 bits modulus and exponent 3 > > I need to create a public.der file (160 bytes) from this data to be passed > to openssl using not a C language. > > I looked into openssl sources but havent yet found DER file structure > description. > > Where I can found the DER public file structure description which this > command accepts ? >
Its a SubjectPublicKeyInfo structure. You can create it either programatically or using the mini-ASN1 compiler in OpenSSL 0.9.8-dev. There's an example of the latter at: http://www.openssl.org/docs/crypto/ASN1_generate_nconf.html#EXAMPLES Steve. -- Dr Stephen N. Henson. Email, S/MIME and PGP keys: see homepage OpenSSL project core developer and freelance consultant. Funding needed! Details on homepage. Homepage: http://www.drh-consultancy.demon.co.uk ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
