OAEP for Private Encryption

[gsubramanian]

Hi,

openssl private_encrypt function does not handle the
RSA_PKCS1_OAEP_PADDING. But the public_encrypt () has this PADDING handled.
Is there any specific reasons behind this? How to use OAEP padding with
PrivateEncyption?

openssl library function:
openssl-0.9.6c/crypto/rsa/rsa_eay.c

/* signing */
static int RSA_eay_private_encrypt(int flen, unsigned char *from,
          unsigned char *to, RSA *rsa, int padding) {
....
     switch (padding)
          {
     case RSA_PKCS1_PADDING:
          i=RSA_padding_add_PKCS1_type_1(buf,num,from,flen);
          break;
     case RSA_NO_PADDING:
          i=RSA_padding_add_none(buf,num,from,flen);
          break;
     case RSA_SSLV23_PADDING:
     default:
          RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,RSA_R_UNKNOWN_PADDING_TYPE);
          goto err;
          }
...............
...................
}



Thanks,
GuruGnanam Subramanian,
iNautix Technologies, Chennai, India
Tel: 91-44-2254 6000  Ext: 1099


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