module.psm1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 |
<#
.SYNOPSIS Encrypts a SecureString with the specified encryption key .PARAMETER StringToEncrypt The string to be encrypted .PARAMETER SecureStringToEncrypt The string to be encrypted .PARAMETER EncryptionKey The encryption key #> Function New-EncryptedString { [OutputType([String])] [CmdletBinding(DefaultParameterSetName='plain')] param ( [Parameter(Mandatory=$true,ParameterSetName='plain',Position=0,ValueFromPipeline=$true)] [String[]] $StringToEncrypt, [Parameter(Mandatory=$true,ParameterSetName='secure',Position=0,ValueFromPipeline=$true)] [securestring[]] $SecureStringToEncrypt, [Parameter(Mandatory=$true,ParameterSetName='secure',Position=1)] [Parameter(Mandatory=$true,ParameterSetName='plain',Position=1)] [ValidateLength(16,32)] [String] $EncryptionKey ) BEGIN { $EncryptionKeyBytes=[System.Text.Encoding]::ASCII.GetBytes($EncryptionKey) } PROCESS { if($PSCmdlet.ParameterSetName -eq 'plain') { foreach ($item in $StringToEncrypt) { $SecureString=[securestring]::new() foreach($Char in $item.ToCharArray()) { $SecureString.AppendChar($Char) } $Encrypted = ConvertFrom-SecureString -SecureString $SecureString -Key $EncryptionKeyBytes Write-Output $Encrypted } } else { foreach ($SecureString in $SecureStringToEncrypt) { $Encrypted = ConvertFrom-SecureString -SecureString $SecureString -Key $EncryptionKeyBytes Write-Output $Encrypted } } } } <# .SYNOPSIS Decrypts a SecureString that was encrypted with the specified key .PARAMETER StringToDecrypt The encrypted SecureString .PARAMETER EncryptionKey The encryption key #> Function Get-EncryptedString { [CmdletBinding()] param ( [Parameter(Mandatory=$true,ValueFromPipeline=$true)] [String[]] $StringToDecrypt, [Parameter(Mandatory=$true)] [ValidateLength(16,32)] [String] $EncryptionKey ) BEGIN { $EncryptionKeyBytes=[System.Text.Encoding]::ASCII.GetBytes($EncryptionKey) } PROCESS { foreach ($item in $StringToDecrypt) { $Decrypted = ConvertTo-SecureString -String $item -Key $EncryptionKeyBytes Write-Output $Decrypted } } } <# .SYNOPSIS Generates a new encryption key for use with a SecureString .PARAMETER KeyLength The length of the key in bits 128,196, or 256 #> Function New-EncryptedStringKey { [OutputType([String])] [CmdletBinding()] param ( [ValidateSet(128,196,256)] [Parameter(Mandatory=$false)] [int] $KeyLength=128, [Parameter(Mandatory=$false)] [Switch] $UseRandomNumberGenerator ) $CharCount=$KeyLength/8 $ClientSecret=New-Object System.String($CharCount) $Seed = New-Object System.Byte[]($CharCount) $NumGen = [System.Security.Cryptography.RandomNumberGenerator]::Create() if($UseRandomNumberGenerator.IsPresent) { try { $NumGen.GetBytes($Seed) $ClientSecret = [System.Convert]::ToBase64String($Seed) } finally { if($NumGen -ne $null) { $NumGen.Dispose() } } } else { $AvailChars=("1,2,3,4,5,6,7,8,9,0," + ` "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z," + ` "-,+,=,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z," + "!,@,#,$,%,^,&,*,<,>,?,/,|,\").Split(',') $CharCount=$KeyLength/8 $EndChars=Get-Random -InputObject $AvailChars -Count $CharCount $ClientSecret=([String]::Join([String]::Empty,$EndChars)) } return $ClientSecret } |