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Tip of the Day
Language: VB7
Expertise: beginner
Dec 1, 2003



Application Security Testing: An Integral Part of DevOps

GetRandomPassword - Generating a random password with the specified length

' Generate a random password with the specified length. The password will only 
' contain digits and letters (either lowercase or uppercase)
' Example: generating a password of 8 chars
'    Dim password As String = GetRandomPassword(8)

Function GetRandomPassword(ByVal length As Integer) As String
    Static rand As New Random
    Dim password As New System.Text.StringBuilder(length)

    For i As Integer = 1 To length
        Dim charIndex As Integer
        ' allow only digits and letters
            charIndex = rand.Next(48, 123)
        Loop Until (charIndex >= 48 AndAlso charIndex <= 57) OrElse (charIndex _
            >= 65 AndAlso charIndex <= 90) OrElse (charIndex >= 97 AndAlso _
            charIndex <= 122)
        ' add the random char to the password being built
    Return password.ToString()
End Function
Marco Bellinaso
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