Windows API - Win32
A core set of Windows application programming interfaces (APIs) for desktop and server applications. Previously known as Win32 API.
2,609 questions
How to limit the Bcrypt library generated random numbers range?
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Zsolt Kántor
40
Reputation points
Hello!
I'm using the Bcrypt library BCryptGenRandom function to generate random numbers.
The BCryptGenRandom function generates UCHARs with range 0-255.
I need a range of 1-50. I know I can use the formula: rand_num % (MAX_NUM + 1 - MIN_NUM) + MIN_NUM. But this formula is not as precise as eventually setting a range and generating random numbers with that range directly from the Windows API.
Is there a way to configure and set a range using the Bcrypt interface?
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Xiaopo Yang - MSFT 12,726 Reputation points Microsoft Vendor2024-09-30T02:59:27.0566667+00:00 There are BCryptQueryContextFunctionProperty and BCryptSetContextFunctionProperty functions that may set the value of a named property for a random number generator function but there is no more information about if the system-preferred random number generator algorithm supports or not and how to do this if it supports.
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Zsolt Kántor 40 Reputation points
2024-09-30T19:08:41.3433333+00:00 Thanks. Do you know, is there a way to contact the developers, or the department to give more info about these function parameters?
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