Stephen, thank you.
The command openssl rsautl -verify -in signature.bin -inkey public.der -pubin -keyform DER -out signout.bin Causes error: RSA operation error 4294560507:error:0407006A:rsa routines:RSA_padding_check_PKCS1_type_1:block type is not 01:crypto/rsa/rsa_pk1.c:100: 4294560507:error:04067072:rsa routines:RSA_EAY_PUBLIC_DECRYPT:padding check fail ed:crypto/rsa/rsa_eay.c:580: If I replace signature.bin with sign.bin file, all is OK Why signature.bin causes error ? ----- Original Message ----- From: "Dr. Stephen Henson" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, December 14, 2004 11:20 PM Subject: Re: DER public key file structure > 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] >
public.der
Description: application/pkix-cert
sig.bin
Description: Binary data
signature.bin
Description: Binary data
