Right,
I've got to the point where I can happily generate keys and sign
data. Hurrah! Now all I need to do is find a way to store keys.
Looking in the rsa.h file you can see the structure is as follows:
struct rsa_st
{
/* The first parameter is used to pickup errors where
* this is passed instead of aEVP_PKEY, it is set to 0 */
int pad;
int version;
RSA_METHOD *meth;
BIGNUM *n;
BIGNUM *e;
BIGNUM *d;
BIGNUM *p;
BIGNUM *q;
BIGNUM *dmp1;
BIGNUM *dmq1;
BIGNUM *iqmp;
/* be careful using this if the RSA structure is shared */
CRYPTO_EX_DATA ex_data;
int references;
int flags;
/* Used to cache montgomery values */
BN_MONT_CTX *_method_mod_n;
BN_MONT_CTX *_method_mod_p;
BN_MONT_CTX *_method_mod_q;
/* all BIGNUM values are actually in the following data, if it is
not
* NULL */
char *bignum_data;
BN_BLINDING *blinding;
};
Is there a function that takes the output from RSA_print_fp and recreates
this structure? If not, which of these variables do I need to record if
I'm going to create the structure and make it work.
I've already got as far as functions that write out all the big nums and
can read them back in (from files) - but the resultant structure will
cause a core dump if I try to use it in a RSA_sign or encrypt.
I'm going to try to record all of the data and see what happens, but
any further info would be most gratefully receieved.
On a side note - if anyone is intersted in the code I've written to do this
stuff so far - let me know and I'll document it properly and release it
when I'm all done.
Cheers, Jim.
IT Manager, Blitz The Net Ltd.
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