mirror of https://git.ffmpeg.org/ffmpeg.git
avutil/random_seed: add support for gcrypt and OpenSSL as source of randomness
Reviewed-by: Anton Khirnov <anton@khirnov.net> Signed-off-by: James Almer <jamrial@gmail.com>
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@ -3892,7 +3892,7 @@ avfilter_deps="avutil"
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avfilter_suggest="libm stdatomic"
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avformat_deps="avcodec avutil"
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avformat_suggest="libm network zlib stdatomic"
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avutil_suggest="clock_gettime ffnvcodec libm libdrm libmfx opencl user32 vaapi vulkan videotoolbox corefoundation corevideo coremedia bcrypt stdatomic"
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avutil_suggest="clock_gettime ffnvcodec gcrypt libm libdrm libmfx opencl openssl user32 vaapi vulkan videotoolbox corefoundation corevideo coremedia bcrypt stdatomic"
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postproc_deps="avutil gpl"
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postproc_suggest="libm stdatomic"
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swresample_deps="avutil"
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@ -30,6 +30,11 @@
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#include <windows.h>
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#include <bcrypt.h>
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#endif
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#if CONFIG_GCRYPT
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#include <gcrypt.h>
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#elif CONFIG_OPENSSL
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#include <openssl/rand.h>
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#endif
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#include <fcntl.h>
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#include <math.h>
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#include <time.h>
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@ -143,6 +148,17 @@ int av_random_bytes(uint8_t* buf, size_t len)
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#endif
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err = read_random(buf, len, "/dev/urandom");
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if (!err)
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return err;
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#if CONFIG_GCRYPT
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gcry_randomize(buf, len, GCRY_VERY_STRONG_RANDOM);
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return 0;
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#elif CONFIG_OPENSSL
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if (RAND_bytes(buf, len) == 1)
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return 0;
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err = AVERROR_EXTERNAL;
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#endif
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return err;
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}
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