Functions/Convert-DateTimeToEpoch.ps1
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function Convert-DateTimeToEpoch { <# .SYNOPSIS Converts a System.DateTime to an epoch (unix) time stamp. .EXAMPLE Convert-DateTimeToEpoch Returns the current datetime as epoch. .EXAMPLE $iat = Convert-DateTimeToEpoch $nbf = (Get-Date).AddMinutes(-3) | Convert-DateTimeToEpoch $exp = (Get-Date).AddMinutes(10) | Convert-DateTimeToEpoch $jwtPayload = @{sub="username@domain.com";iat=$iat;nbf=$nbf;exp=$exp} $jwtPayloadSerializedAndEncoded = $jwtPayload | ConvertTo-JwtPart Generates JWT payload with an iat claim of the current datetime, an nbf claim skewed three minutes in the past, and an expiration of ten minutes in the future from the current datetime. .PARAMETER DateTime A System.DateTime. Default value is current date and time. .INPUTS System.DateTime .OUTPUTS System.Int64 .LINK https://en.wikipedia.org/wiki/Unix_time ConvertTo-JwtPart #> [CmdletBinding()] [Alias('GetEpoch')] [OutputType([System.Int64])] Param ( [Parameter(Mandatory=$false, ValueFromPipeline=$true, Position=0)][ValidateNotNullOrEmpty()][Alias("Date")][DateTime]$DateTime=(Get-Date) ) PROCESS { $dtut = $DateTime.ToUniversalTime() [TimeSpan]$ts = New-TimeSpan -Start (Get-Date "01/01/1970") -End $dtut [Int64]$secondsSinceEpoch = [Math]::Floor($ts.TotalSeconds) return $secondsSinceEpoch } } |