/*
* Obtain Pm after feeSigNewWithKey() or feeSigParse()
*/
unsigned char *feeSigPm(feeSig sig,
unsigned *PmLen)
{
sigInst *sinst = (sigInst*) sig;
unsigned char *Pm;
if(sinst->PmX == NULL) {
dbgLog(("feeSigPm: no PmX!\n"));
return NULL;
}
else {
Pm = mem_from_giant(sinst->PmX, PmLen);
#if SIG_DEBUG
if(sigDebug)
{
int i;
printf("Pm : "); printGiant(sinst->PmX);
printf("PmData: ");
for(i=0; i<*PmLen; i++) {
printf("%x:", Pm[i]);
}
printf("\n");
}
#endif // SIG_DEBUG
}
return Pm;
}
feeReturn feePubKeyCreatePad(feePubKey myKey,
feePubKey theirKey,
unsigned char **padData, /* RETURNED */
unsigned *padDataLen) /* RETURNED padData length in bytes */
{
pubKeyInst *myPkinst = (pubKeyInst *) myKey;
pubKeyInst *theirPkinst = (pubKeyInst *) theirKey;
giant pad;
unsigned char *result;
unsigned padLen;
key pkey;
/*
* Do some compatibility checking (myKey, theirKey) here...?
*/
if(DEFAULT_CURVE == CURVE_PLUS) {
pkey = theirPkinst->plus;
}
else {
pkey = theirPkinst->minus;
}
pad = make_pad(myPkinst->privGiant, pkey);
result = mem_from_giant(pad, &padLen);
freeGiant(pad);
/*
* Ensure we have a the minimum necessary for DES. A bit of a hack,
* to be sure.
*/
if(padLen >= FEE_DES_MIN_STATE_SIZE) {
*padData = result;
*padDataLen = padLen;
}
else {
*padData = (unsigned char*) fmalloc(FEE_DES_MIN_STATE_SIZE);
*padDataLen = FEE_DES_MIN_STATE_SIZE;
bzero(*padData, FEE_DES_MIN_STATE_SIZE);
bcopy(result, *padData, padLen);
ffree(result);
}
return FR_Success;
}
