Hi Vadim Great! It works fine. When I got your mail I was just getting ready to test this function. This public key I have loaded, shall be used to verify a signature. I have the signature as a 128 byte binary blob.
I have been looking at the RSA_public_decrypt() function, but I'm not quite sure how it works. How can I verify a signature without specifying what was signed in the first place? Thanks for all your help, Kim -----Oprindelig meddelelse----- Fra: Vadim Fedukovich [mailto:[EMAIL PROTECTED]] Sendt: 30. maj 2002 12:15 Til: [EMAIL PROTECTED] Emne: Re: Format of RSA public key ? On Thu, May 30, 2002 at 08:59:59AM +0200, Hellan,Kim KHE wrote: > Hi Vadim > > I should have been more specific. > I know it is modulus and public exponent, but what I'm looking for is some OpenSSL >function to load this key into a EVP_PKEY structure. > > Any ideas? d2i_RSAPublicKey() and EVP_PKEY_assign_RSA() should work hope this helps, Vadim > > Thanks, > Kim > > > -----Oprindelig meddelelse----- > Fra: Vadim Fedukovich [mailto:[EMAIL PROTECTED]] > Sendt: 29. maj 2002 17:03 > Til: OpenSSL Users > Emne: Re: Format of RSA public key ? > > > hi Kim, > > On Wed, 29 May 2002, Hellan,Kim KHE wrote: > > > Hi > > > > When I use OpenSSL to extract 1024 bit RSA public keys to a binary file, I get a >162 byte file with the following ASN.1 structure: > > > > 0:d=0 hl=3 l= 159 cons: SEQUENCE > > 3:d=1 hl=2 l= 13 cons: SEQUENCE > > 5:d=2 hl=2 l= 9 prim: OBJECT :rsaEncryption > > 16:d=2 hl=2 l= 0 prim: NULL > > 18:d=1 hl=3 l= 141 prim: BIT STRING > > > > These public keys can easily be loaded in OpenSSL. > > > > I now have to support some 1024 RSA public keys with a different structure. The >binary blob containing the public key is only 140 bytes and the ASN.1 structure looks >like this: > > > > 0:d=0 hl=3 l= 137 cons: SEQUENCE > > 3:d=1 hl=3 l= 129 prim: INTEGER >:800000000000000000000000000000622FB09CAD2A75E84A00E2613FF1B52ED2382C6274E45364C140FE6639F437E07A135D824D99FEAE0C8BBF1782960AA9FF38C67373C41BD8DDB341754F78823BC3321581D5EF5349F5DAAD46B3B954CA9742280528DAABFC7B23229AF04FFDBE733E0AE310C3466224FC1A9628FF14F6ED > > this is modulus > > > 135:d=1 hl=2 l= 3 prim: INTEGER :010001 > > ..and public exponent > > good luck, > Vadim > > > > > Does anyone know how to handle this "format" in OpenSSL. How do I load these >public keys ? > > > > Thanks, > > Kim Hellan > > KMD / KMD-CA > > http://www.kmd-ca.dk > > Mailto:[EMAIL PROTECTED] > > > > ______________________________________________________________________ > > OpenSSL Project http://www.openssl.org > > User Support Mailing List [EMAIL PROTECTED] > > Automated List Manager [EMAIL PROTECTED] > > > > ______________________________________________________________________ > OpenSSL Project http://www.openssl.org > User Support Mailing List [EMAIL PROTECTED] > Automated List Manager [EMAIL PROTECTED] > ______________________________________________________________________ > OpenSSL Project http://www.openssl.org > User Support Mailing List [EMAIL PROTECTED] > Automated List Manager [EMAIL PROTECTED] ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED] ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
