Address noise_rand_bytes silent failure on Windows:
#4
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Per its documentation, `noise_rand_bytes` returns "cryptographically-strong random bytes from the operating system." On Windows, the existing implementation of the function does not check that the `CryptGenRandom` API succeeds. While failure is unlikely, it is prudent to actually check. If merged this commit will cause the process to exit if the function is not able to generate the requested number of random bytes; the code also checks that the provided buffer is non-null and that the number of bytes requested is non-zero.
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Per its documentation,
noise_rand_bytesreturns "cryptographically-strong random bytes from the operating system."On Windows, the existing implementation of the function does not check that the
CryptGenRandomAPI succeeds. While failure is unlikely, it is prudent to actually check.If merged this commit will cause the process to exit if the function is not able to generate the requested number of random bytes; the code also checks that the provided buffer is non-null and that the number of bytes requested is non-zero.