On 21.11.2014, at 07:44, Jesse Jiang <jessejiang0...@outlook.com> wrote: > Now, I find a function get_generic_seed() > So, I use this function will work fine?
It is already used as fallback so I don't see why you'd have to change the code at all. > uint32_t av_get_random_seed(void){ uint32_t seed; > #if HAVE_CRYPTGENRANDOM HCRYPTPROV provider; if > (CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_FULL, > CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) { BOOL ret = > CryptGenRandom(provider, sizeof(seed), (PBYTE) &seed); > CryptReleaseContext(provider, 0); if (ret) return seed; > }#endif > #if HAVE_WINRTAPI return get_generic_seed();#endif > if (read_random(&seed, "/dev/urandom") == sizeof(seed)) return > seed; if (read_random(&seed, "/dev/random") == sizeof(seed)) > return seed; return get_generic_seed();} >> From: jessejiang0...@outlook.com >> To: ffmpeg-devel@ffmpeg.org >> Date: Fri, 21 Nov 2014 03:51:12 +0000 >> Subject: Re: [FFmpeg-devel] WinRT API support patch >> >> Hi All, >> I did some research, rand() is pseudo random. CryptGenRandom is the >> system-wide seed, but it cannot be used in Windows RT. >> I try to use CryptographicBuffer, which is Windows RT API, but there is a >> problem. This API needs to link Windows.winmd. The Windows.winmd just like a >> DLL, but it may different from Windows RT and Windows Phone. First, the SDKs >> are in the different PATH,Second, the files are also different. >> It means that developer need to choice platform first, and then compiler for >> different library. >> I hope ffmpeg only depends on support win32 apis and CRT apis. >> So is there any way to instead of srand(time(0)); rand(); ? How about c++11 >> <random> or Mersenne twister Algorithmic >> Best regards,Jesse >> Date: Fri, 21 Nov 2014 02:49:59 +0100 >> From: michae...@gmx.at >> To: ffmpeg-devel@ffmpeg.org >> Subject: Re: [FFmpeg-devel] WinRT API support patch >> >> On Fri, Nov 21, 2014 at 01:43:29AM +0000, Jesse Jiang wrote: >>> Do you mean that we can use rand() instead of CryptGenRandom in ffmpeg? >> >> rand() is completely wrong >> its not even doing the correct operation >> >> rand() is pseudo random >> the code requires a strong (and non pseudo) random value >> >> [...] >> -- >> Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB >> >> When you are offended at any man's fault, turn to yourself and study your >> own failings. Then you will forget your anger. -- Epictetus >> >> _______________________________________________ >> ffmpeg-devel mailing list >> ffmpeg-devel@ffmpeg.org >> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> _______________________________________________ >> ffmpeg-devel mailing list >> ffmpeg-devel@ffmpeg.org >> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel