static void ccasn_encode_int(cc_size n, const cc_unit*s, size_t s_size, uint8_t **buffer)
{
**buffer = ASN1_INTEGER;
*buffer += 1;
DERSize itemLength = 4;
DEREncodeLength(s_size, *buffer, &itemLength);
*buffer += itemLength;
ccn_write_int(n, s, s_size, *buffer);
*buffer += s_size;
}
CCCryptorStatus
CCRSACryptorGeneratePair(size_t keysize, uint32_t e, CCRSACryptorRef *publicKey, CCRSACryptorRef *privateKey)
{
CCCryptorStatus retval;
CCRSACryptor *privateCryptor = NULL;
CCRSACryptor *publicCryptor = NULL;
struct ccrng_state *theRng1 = ccDRBGGetRngState();
struct ccrng_state *theRng2 = ccDevRandomGetRngState();
CC_DEBUG_LOG(ASL_LEVEL_ERR, "Entering\n");
// ccrsa_generate_key() requires the exponent as length / pointer to bytes
cc_unit cc_unit_e = (cc_unit) e;
size_t eSize = ccn_write_int_size(1, &cc_unit_e);
uint8_t eBytes[eSize];
ccn_write_int(1, &cc_unit_e, eSize, eBytes);
*publicKey = *privateKey = NULL;
__Require_Action((privateCryptor = ccMallocRSACryptor(keysize, ccRSAKeyPrivate)) != NULL, errOut, retval = kCCMemoryFailure);
// __Require_Action((ccrsa_generate_key(keysize, privateCryptor->rsaKey.full, sizeof(e), &e, theRng) == 0), errOut, retval = kCCDecodeError);
__Require_Action((ccrsa_generate_931_key(keysize, privateCryptor->fk, eSize, eBytes, theRng1, theRng2) == 0), errOut, retval = kCCDecodeError);
privateCryptor->keyType = ccRSAKeyPrivate;
__Require_Action((publicCryptor = CCRSACryptorGetPublicKeyFromPrivateKey(privateCryptor)) != NULL, errOut, retval = kCCMemoryFailure);
*publicKey = publicCryptor;
*privateKey = privateCryptor;
__Require_Action(ccRSApairwiseConsistencyCheck(*privateKey, *publicKey) == true, errOut, retval = kCCDecodeError);
return kCCSuccess;
errOut:
if(privateCryptor) ccRSACryptorClear(privateCryptor);
if(publicCryptor) ccRSACryptorClear(publicCryptor);
*publicKey = *privateKey = NULL;
return retval;
}