void noise_get_heavy(void (*func) (void *, int)) { HANDLE srch; WIN32_FIND_DATA finddata; DWORD pid; HCRYPTPROV crypt_provider; char winpath[MAX_PATH + 3]; GetWindowsDirectory(winpath, sizeof(winpath)); strcat(winpath, "\\*"); srch = FindFirstFile(winpath, &finddata); if (srch != INVALID_HANDLE_VALUE) { do { func(&finddata, sizeof(finddata)); } while (FindNextFile(srch, &finddata)); FindClose(srch); } pid = GetCurrentProcessId(); func(&pid, sizeof(pid)); if (!wincrypt_module) { wincrypt_module = load_system32_dll("advapi32.dll"); GET_WINDOWS_FUNCTION(wincrypt_module, CryptAcquireContextA); GET_WINDOWS_FUNCTION(wincrypt_module, CryptGenRandom); GET_WINDOWS_FUNCTION(wincrypt_module, CryptReleaseContext); } if (wincrypt_module && p_CryptAcquireContextA && p_CryptGenRandom && p_CryptReleaseContext && p_CryptAcquireContextA(&crypt_provider, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) { BYTE buf[32]; if (p_CryptGenRandom(crypt_provider, 32, buf)) { func(buf, sizeof(buf)); } p_CryptReleaseContext(crypt_provider, 0); } read_random_seed(func); /* Update the seed immediately, in case another instance uses it. */ random_save_seed(); }
bool win_read_random(void *buf, unsigned wanted) { bool toret = false; HCRYPTPROV crypt_provider; if (!wincrypt_module) { wincrypt_module = load_system32_dll("advapi32.dll"); GET_WINDOWS_FUNCTION(wincrypt_module, CryptAcquireContextA); GET_WINDOWS_FUNCTION(wincrypt_module, CryptGenRandom); GET_WINDOWS_FUNCTION(wincrypt_module, CryptReleaseContext); } if (wincrypt_module && p_CryptAcquireContextA && p_CryptGenRandom && p_CryptReleaseContext && p_CryptAcquireContextA(&crypt_provider, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) { toret = p_CryptGenRandom(crypt_provider, wanted, buf); p_CryptReleaseContext(crypt_provider, 0); } return toret; }