You're right, I get RSA_R_BAD_E_VALUE (101). Just took the wrong define for the mail. ERR_GET_REASON returns 101.
I want to use RSA_public_decrypt to get back the hashvalue that was encrypted with RSA inside the smartcardterminal. And I don't get the private key of the card so I have to use the public key. This is only for verification purpose. Frank -----Ursprüngliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von David Schwartz Gesendet: Mittwoch, 1. August 2007 10:22 An: openssl-users@openssl.org Betreff: RE: RSA_public_decrypt problem > I'm trying to use the RSA_public_decrypt function but I need to set up > the public key "manually". > I have the public exponent and modulus in the form of an array of > 'unsigned char' and have converted these to BIGNUM format using > BN_bin2bn. I assigned them to the RSA fields n and e. > The I call RSA_public_decrypt, but it is returning -1. Calling > ERR_GET_REASON returns 101 (RSA_F_RSA_EAY_PRIVATE_DECRYPT?)? > What does this mean and how do I need to change my program? No, reason 101 is RSA_R_BAD_E_VALUE, assuming you're sure this was the return value from ERR_GET_REASON. This can only come from RSA_F_RSA_GENERATE_KEY. So either you're not giving the correct reason code or you're getting an error from a previous function. > I'm using OpenSSL 0.9.8e and WinXP/Visual Studio 2005. > The modulus and exponent values I set to the structure are read from a > smartcard. Are you sure you want RSA_public_decrypt? This is normally only used for cust signature processing. (Normally decryption requires the private key.) DS ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager [EMAIL PROTECTED] ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]
