Hello list,
I have a smartcard that gives me a PKCS#1 RSAPublicKey structure of the
public key on the card and I need to generate a X.509
SubjectPublicKeyInfo structure from it. I already have a C++ wrapper
class that uses gnutls_pubkey_export to generate the
SubjectPublicKeyInfo structure. The question is how to import the
RSAPublicKey structure right.
As there seems to be no direct way to import from PCKS#1 I tried the
following approach, which failed:
1) Use gnutls_rsa_params_import_pkcs1 to import PKCS1 structure into
rsa_params structure
2) Use gnutls_rsa_params_export_raw to export modulus and exponent
3) Use gnutls_pubkey_import_rsa_raw to finally import modulus and
exponent into gnutls_pubkey_t
The call to gnutls_rsa_params_import_pkcs1 fails with a
GNUTLS_E_ASN1_DER_ERROR. The data can be viewed fine from within an ASN1
viewer.
Questions:
* Is there an onbvious way to import PKCS#1 RSAPublicKey into a
gnutls_pubkey_t structure?
* From my short look into the code of gnutls_rsa_params_import_pkcs1, it
seems that it calls gnutls_x509_privkey_import which uses
_gnutls_privkey_decode_pkcs1_rsa_key to import a _private key_ from a
_RSAPrivateKey_ structure although it according to doc "should contain a
PKCS1 RSAPublicKey structure PEM or DER encoded". Of course this fails
in my case, as what I hand over is a RSAPublicKey structure, not a
RSAPrivatekey. What's wrong here?
Please CC me when answering, as I am not on the list. Thx.
Best regards, René
--
Sirrix AG security technologies - http://www.sirrix.com
René Korthaus eMail: [email protected]
Tel +49(681) 959 86-163 Fax +49(681) 959 86-5163
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