Functions/ConvertTo-Key.ps1
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# Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. function ConvertTo-Key { param( $From, $InputObject ) Set-StrictMode -Version 'Latest' Use-CallerPreference -Cmdlet $PSCmdlet -Session $ExecutionContext.SessionState if( $InputObject -isnot [byte[]] ) { if( $InputObject -is [SecureString] ) { $InputObject = Convert-SecureStringToString -SecureString $InputObject } elseif( $InputObject -isnot [string] ) { Write-Error -Message ('Encryption key must be a SecureString, a string, or an array of bytes not a {0}. If you are passing an array of bytes, make sure you explicitly cast it as a `byte[]`, e.g. `([byte[]])@( ... )`.' -f $InputObject.GetType().FullName) return } $Key = [Text.Encoding]::UTF8.GetBytes($InputObject) } else { $Key = $InputObject } if( $Key.Length -ne 128/8 -and $Key.Length -ne 192/8 -and $Key.Length -ne 256/8 ) { Write-Error -Message ('Key is the wrong length. {0} is using AES, which requires a 128-bit, 192-bit, or 256-bit key (16, 24, or 32 bytes, respectively). You passed a key of {1} bits ({2} bytes).' -f $From,($Key.Length*8),$Key.Length) return } return $Key } |