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#include "diffiehellman.ih"
// static
EVP_PKEY *DiffieHellman::keyPair(EVP_PKEY *domainkey)
{
EVP_PKEY_CTX *keyCtx = EVP_PKEY_CTX_new_from_pkey(0, domainkey, 0);
if (!keyCtx)
throw Exception{} << "EVP_PKEY_CTX_new_from_pkey failed";
if (EVP_PKEY_keygen_init(keyCtx) <= 0)
throw Exception{} << "EVP_PKEY_CTX_keygen_init failed";
EVP_PKEY *keys = 0;
if (EVP_PKEY_generate(keyCtx, &keys) <= 0)
throw Exception{} << "EVP_PKEY_generate failed";
EVP_PKEY_CTX_free(keyCtx);
BIGNUM *tmp = 0;
if (not EVP_PKEY_get_bn_param(keys, "pub", &tmp))
throw Exception{} << "get_bn_param pub fails";
BN_free(tmp);
tmp = 0;
if (not EVP_PKEY_get_bn_param(keys, "priv", &tmp))
throw Exception{} << "get_bn_param priv fails";
BN_free(tmp);
return keys;
}
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