app_keygen
sigkey = app_keygen(mac_ctx, mac_name, 0, 0 /* not verbose */);
pkey = app_keygen(ctx, "DSA", numbits, verbose);
pkey = app_keygen(ctx, "DSA", nbits, verbose);
: app_keygen(ctx, algname, 0, 0 /* not verbose */);
pkey = app_keygen(ctx, "RSA", num, verbose);
EVP_PKEY *app_keygen(EVP_PKEY_CTX *ctx, const char *alg, int bits, int verbose);
pkey = app_keygen(genctx, keyalgstr, newkey_len, verbose);