//
// DSA Parameter Generation
//
void BSafe::BSafeKeyPairGenContext::generate(
const Context &context,
uint32 bitSize,
CssmData ¶ms,
uint32 &attrCount,
Context::Attr * &attrs)
{
assert(context.algorithm() == CSSM_ALGID_DSA);
B_ALGORITHM_OBJ genAlg = NULL;
B_ALGORITHM_OBJ result = NULL;
try {
check(B_CreateAlgorithmObject(&genAlg));
B_DSA_PARAM_GEN_PARAMS genParams;
genParams.primeBits = bitSize;
check(B_SetAlgorithmInfo(genAlg, AI_DSAParamGen, POINTER(&genParams)));
setRandom();
check(B_GenerateInit(genAlg, chooser(), bsSurrender), true);
check(B_CreateAlgorithmObject(&result));
check(B_GenerateParameters(genAlg, result, bsRandom, bsSurrender));
// get parameters out of algorithm object
A_DSA_PARAMS *kParams = NULL;
check(B_GetAlgorithmInfo((POINTER *)&kParams, result, AI_DSAKeyGen), true);
// shred them into context attribute form
attrs = normAllocator->alloc<Context::Attr>(3);
attrs[0] = Context::Attr(CSSM_ATTRIBUTE_PRIME,
*BSafeItem(kParams->prime).copyp<CssmData>(*normAllocator));
attrs[1] = Context::Attr(CSSM_ATTRIBUTE_SUBPRIME,
*BSafeItem(kParams->subPrime).copyp<CssmData>(*normAllocator));
attrs[2] = Context::Attr(CSSM_ATTRIBUTE_BASE,
*BSafeItem(kParams->base).copyp<CssmData>(*normAllocator));
attrCount = 3;
// clean up
B_DestroyAlgorithmObject(&result);
B_DestroyAlgorithmObject(&genAlg);
} catch (...) {
// clean up
B_DestroyAlgorithmObject(&result);
B_DestroyAlgorithmObject(&genAlg);
throw;
}
}
int main(int argc, char *argv[])
{
int status;
int keySize = argv[1] ? atoi(argv[1]) : 512;
printf("Key size = %d bits\n", keySize);
B_ALGORITHM_OBJ pGen = NULL;
check(B_CreateAlgorithmObject(&pGen));
B_DSA_PARAM_GEN_PARAMS gParams;
gParams.primeBits = keySize;
check(B_SetAlgorithmInfo(pGen, AI_DSAParamGen, POINTER(&gParams)));
B_ALGORITHM_OBJ random = NULL;
check(B_CreateAlgorithmObject(&random));
check(B_SetAlgorithmInfo(random, AI_X962Random_V0, NULL));
check(B_RandomInit(random, chooser, NULL));
check(B_RandomUpdate(random, seed, sizeof(seed), NULL));
check(B_GenerateInit(pGen, chooser, NULL));
B_ALGORITHM_OBJ result = NULL;
check(B_CreateAlgorithmObject(&result));
printf("Generating DSA parameters\n");
check(B_GenerateParameters(pGen, result, random, NULL));
printf("DSA generate complete, writing...\n");
A_DSA_PARAMS *dParams;
memset(&dParams, 0, sizeof(dParams));
check(B_GetAlgorithmInfo((POINTER *)&dParams, result, AI_DSAKeyGen));
dumpItem(dParams->prime, "prime");
dumpItem(dParams->subPrime, "subprime");
dumpItem(dParams->base, "base");
#if 0
B_KEY_OBJ pubKey = NULL;
check(B_CreateKeyObject(&pubKey));
B_KEY_OBJ privKey = NULL;
check(B_CreateKeyObject(&privKey));
B_ALGORITHM_OBJ gen = NULL;
check(B_CreateAlgorithmObject(&gen));
A_RSA_KEY_GEN_PARAMS args;
args.modulusBits = keySize;
args.publicExponent.data = exponent;
args.publicExponent.len = sizeof(exponent);
check(B_SetAlgorithmInfo(gen, AI_RSAStrongKeyGen, POINTER(&args)));
check(B_GenerateInit(gen, chooser, NULL));
check(B_GenerateKeypair(gen, pubKey, privKey, random, NULL));
B_ALGORITHM_OBJ enc = NULL;
check(B_CreateAlgorithmObject(&enc));
check(B_SetAlgorithmInfo(enc, AI_PKCS_RSAPublic, NULL));
check(B_EncryptInit(enc, pubKey, chooser, NULL));
unsigned int inLen;
check(B_EncryptUpdate(enc, crypt, &inLen, sizeof(crypt),
POINTER(in), sizeof(in), random, NULL));
printf("EncryptUpdate output = %u\n", inLen);
check(B_EncryptFinal(enc, crypt, &inLen, sizeof(crypt), random, NULL));
printf("EncryptFinal output=%u\n", inLen);
B_ALGORITHM_OBJ dec = NULL;
check(B_CreateAlgorithmObject(&dec));
check(B_SetAlgorithmInfo(dec, AI_PKCS_RSAPrivate, NULL));
check(B_DecryptInit(dec, privKey, chooser, NULL));
unsigned int outLen, outLen2;
check(B_DecryptUpdate(dec, out, &outLen, sizeof(out),
crypt, inLen, random, NULL));
printf("DecryptUpdate output = %u\n", outLen);
check(B_DecryptFinal(dec, out2, &outLen2, sizeof(out2), random, NULL));
printf("DecryptFinal output=%u %s\n", outLen2, (char*)out2);
B_DestroyKeyObject(&pubKey);
B_DestroyKeyObject(&privKey);
#endif
exit(0);
}
