diff options
Diffstat (limited to 'drivers/unix/os_unix.cpp')
| -rw-r--r-- | drivers/unix/os_unix.cpp | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/unix/os_unix.cpp b/drivers/unix/os_unix.cpp index 00f84eba8c..7d57926757 100644 --- a/drivers/unix/os_unix.cpp +++ b/drivers/unix/os_unix.cpp @@ -65,6 +65,21 @@ #include <time.h> #include <unistd.h> +#if defined(OSX_ENABLED) || (defined(__ANDROID_API__) && __ANDROID_API__ >= 28) +// Random location for getentropy. Fitting. +#include <sys/random.h> +#define UNIX_GET_ENTROPY +#elif defined(__FreeBSD__) || defined(__OpenBSD__) || (defined(__GLIBC_MINOR__) && (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 26)) +// In <unistd.h>. +// One day... (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 700) +// https://publications.opengroup.org/standards/unix/c211 +#define UNIX_GET_ENTROPY +#endif + +#if !defined(UNIX_GET_ENTROPY) && !defined(NO_URANDOM) +#include <fcntl.h> +#endif + /// Clock Setup function (used by get_ticks_usec) static uint64_t _clock_start = 0; #if defined(__APPLE__) @@ -150,6 +165,31 @@ String OS_Unix::get_stdin_string(bool p_block) { return ""; } +Error OS_Unix::get_entropy(uint8_t *r_buffer, int p_bytes) { +#if defined(UNIX_GET_ENTROPY) + int left = p_bytes; + int ofs = 0; + do { + int chunk = MIN(left, 256); + ERR_FAIL_COND_V(getentropy(r_buffer + ofs, chunk), FAILED); + left -= chunk; + ofs += chunk; + } while (left > 0); +#elif !defined(NO_URANDOM) + int r = open("/dev/urandom", O_RDONLY); + ERR_FAIL_COND_V(r < 0, FAILED); + int left = p_bytes; + do { + ssize_t ret = read(r, r_buffer, p_bytes); + ERR_FAIL_COND_V(ret <= 0, FAILED); + left -= ret; + } while (left > 0); +#else + return ERR_UNAVAILABLE; +#endif + return OK; +} + String OS_Unix::get_name() const { return "Unix"; } |