Generate an int within range if max > min, and min if min = max public static int Next( int min, int max) _rngProvider.GetBytes(buffer) // Fill the buffer uint random = BitConverter.ToUInt32(buffer, 0) Generate a random real number within range public static double Next() Return BitConverter.ToInt32(randomBuffer, 0) Public static readonly RNGCryptoServiceProvider _rngProvider = new RNGCryptoServiceProvider()
RANDOM PASSWORD GENERATOR GOOGLE CODE
The Code Determine the set of acceptable charactersįirst, we need the set of all possible characters for each type of the 4 types above.Ĭopy Code public static class RandomService
The job can be divided into two classes: RandomService (step 1 - 4) and PasswordService (step 5 - 6). Generate a string of random t symbol characters.Generate a string of random z numeric characters.Generate a string of random y upper-case characters.Generate a string of random x lower-case characters.It contains x lower-case, y upper case, z numeric, and t symbol characters (where x + y + z + t = n). Password is usually required to be n characters length.The 'l' character is sometimes confused with the number 1.NotesĪ password might contain 4 types of characters: This article is to share my experience working with a project that requires cryptographically secure, and RNGCryptoServiceProvider is my choice. For comparison between the two options, pros and cons, and their usages, you can google them. Instead, RNGCryptoServiceProvider which (based on the documentation) implements a cryptographic Random Number Generator (RNG), is a recommended choice. When it comes to generating random numbers that requires higher randomness (less predictable/guessable/biased distribution), the popular System.Random is not a good option.
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