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MFA_utils.ps1
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MFA_utils.ps1
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# Creates an Oath counter
# Jun 26th 2020
function Get-OathCounter
{
[cmdletbinding()]
Param()
Process
{
$OathCounter = [int](((Get-Date).ToUniversalTime() - $epoch).TotalSeconds / 30)
return $OathCounter
}
}
# Generates a new time-based OTP for MFA
# Jun 26th 2020
function Generate-tOTP
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[String]$SecretKey,
[Parameter(Mandatory=$False)]
[int]$Seconds=0,
[Parameter(Mandatory=$False)]
[int]$TimeShift=0,
[Parameter(Mandatory=$False)]
[int]$TimeStep=30,
[Parameter(Mandatory=$False)]
[int]$Digits=6
)
Process
{
if ($Digits -le 0)
{
$Digits = 6 # Can't be zero so default to six
}
if($Seconds -le 0)
{
# Can't be zero so default to current time
$Seconds = [int]((Get-Date).ToUniversalTime() -$epoch).TotalSeconds
}
if($TimeStep -le 0)
{
$TimeStep = 30 # Can't be zero, so default to 30 seconds
}
$Seconds = ($Seconds + $TimeShift) / $TimeStep
[byte[]]$timeBytes = @( 0,0,0,0, # Integer has only 4 bytes so the first four are zeros
[byte](([int]$Seconds -shr 24) -band 255),
[byte](([int]$Seconds -shr 16) -band 255),
[byte](([int]$Seconds -shr 8) -band 255),
[byte]( [int]$Seconds -band 255)
)
return Generate-hOTP -SecretKey $SecretKey -timeBytes $timeBytes -Digits $Digits
}
}
# Generates a new HMAC based OTP for MFA
# Jun 26th 2020
function Generate-hOTP
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[String]$SecretKey,
[Parameter(Mandatory=$True)]
[byte[]]$TimeBytes,
[Parameter(Mandatory=$True)]
[int]$Digits,
[Parameter(Mandatory=$False)]
[int]$Position = 0
)
Begin
{
$hOtpFullResult = 1073741840
}
Process
{
$divider=0
if ($Digits -ge 1 -and $Digits -le 9)
{
$divider = [Math]::Pow(10, $Digits)
}
elseif ($Digits -eq $hOtpFullResult)
{
$divider = 0
}
else
{
throw "Only 1-9 digits are accepted!"
}
# Calculate the hash using the secret as a key
[byte[]]$decodedSecret = From-Base32String -Secret $SecretKey
$HmacSHA1 = [Security.Cryptography.HMACSHA1]::new($decodedSecret)
$hmacSize = 20
$hash=$HmacSHA1.ComputeHash($TimeBytes)
if ($divider -gt 0)
{
if ($Position -le 0 -or $Position -ge ($hmacSize - 4))
{
$Position = $hash[$hmacSize- 1] -band 15
}
# Generate the OTP from the hash
$retVal = ($hash[$Position] -band 127) -shl 24
$retVal = $retVal -bor ($hash[$Position + 1] -band 255) -shl 16
$retVal = $retVal -bor ($hash[$Position + 2] -band 255) -shl 8
$retVal = $retVal -bor ($hash[$Position + 3] -band 255)
$retVal = $retVal % $divider
return $retVal
}
else
{
return Convert-ByteArrayToHex -Bytes $hash
}
}
}
# Generates a validation code
# Jun 27th 2020
function Generate-ValidationCode
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[String]$SecretKey,
[Parameter(Mandatory=$False)]
[int]$OathCounter=0
)
Process
{
if ($OathCounter -le 0)
{
$OathCounter = Get-OathCounter
}
$validationCode = Generate-tOTP -SecretKey $SecretKey -Digits 1073741840 -Seconds ($OathCounter*30)
return $validationCode.toLower()
}
}
# Converts Base32 string to bytes
# Jun 26th 2020
# Credits: HumanEquivalentUnit
function From-Base32String
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[String]$Secret
)
Process
{
$bigInteger = [Numerics.BigInteger]::Zero
foreach ($char in ($secret.ToUpper() -replace '[^A-Z2-7]').GetEnumerator()) {
$bigInteger = ($bigInteger -shl 5) -bor ('ABCDEFGHIJKLMNOPQRSTUVWXYZ234567'.IndexOf($char))
}
[byte[]]$secretAsBytes = $bigInteger.ToByteArray()
# BigInteger sometimes adds a 0 byte to the end,
# if the positive number could be mistaken as a two's complement negative number.
# If it happens, we need to remove it.
if ($secretAsBytes[-1] -eq 0) {
$secretAsBytes = $secretAsBytes[0..($secretAsBytes.Count - 2)]
}
# BigInteger stores bytes in Little-Endian order,
# but we need them in Big-Endian order.
[array]::Reverse($secretAsBytes)
return [byte[]]$secretAsBytes
}
}
# Converts Base32 string to bytes
# Jun 26th 2020
# Credits: HumanEquivalentUnit
function To-Base32String
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[byte[]]$Secret
)
Process
{
$byteArrayAsBinaryString = -join $Secret.ForEach{
[Convert]::ToString($_, 2).PadLeft(8, '0')
}
$Base32Secret = [regex]::Replace($byteArrayAsBinaryString, '.{5}', {
param($Match)
'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567'[[Convert]::ToInt32($Match.Value, 2)]
})
return $Base32Secret
}
}
# Parses authentication apps data
# Jun 27th 2020
function Parse-AuthApps
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
$appDetails
)
Process
{
$apps=@()
foreach($app in $appDetails)
{
$appAtributes = [ordered]@{
"AuthenticationType"=$app.AuthenticationType
"DeviceName"= $app.DeviceName
"DeviceTag"= $app.DeviceTag
"DeviceToken"= $app.DeviceToken
"Id"= $app.Id
"NotificationType"= $app.NotificationType
"OathTokenTimeDrift"=$app.OathTokenTimeDrift
"OathSecretKey"= $app.OathTokenSecretKey
"PhoneAppVersion"= $app.PhoneAppVersion
"TimeInterval"= $app.TimeInterval
"LastAuthTime" = $(if($app.lastAuthenticatedTimestamp){[DateTime]$app.lastAuthenticatedTimestamp}else{$null})
}
$apps+=New-Object psobject -Property $appAtributes
}
return $apps
}
}
# Gets MFA App Registration information (i.e. url, activation code, and session context)
# Jul 1st 2020
function Get-MFAAppRegistrationInfo
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[String]$AccessToken,
[Parameter(Mandatory=$False)]
[ValidateSet("APP","OTP")]
[String]$Type="APP"
)
Process
{
# Create the headers
$headers=@{
"Authorization" = "Bearer $AccessToken"
"Content-Type" = "application/json"
"User-Agent" = Get-Setting -Setting "User-Agent"
}
# Registration type
if($Type -eq "APP")
{
$securityInfoType = 2
}
elseif($Type -eq "OTP")
{
$securityInfoType = 3
}
try
{
# Get the authorization information
$response = Invoke-RestMethod -UseBasicParsing -Uri "https://account.activedirectory.windowsazure.com/securityinfo/Authorize" -Method POST -Headers $headers
}
catch
{
throw $_
}
# Strip the carbage from the start and convert to psobject
$response=$response.Substring($response.IndexOf("{")-1) | ConvertFrom-Json
# Verbose
Write-Verbose "Authorization information"
Write-Verbose " Is authorized: $($response.isAuthorized)"
Write-Verbose " Require MFA: $($response.requireMfa)"
Write-Verbose " Require NGC MFA: $($response.requireNgcMfa)"
Write-Verbose " Prompt for login: $($response.promptForLogin)"
Write-Verbose " My star enabled: $($response.isMyStarEnabled)"
# Check is user authorized to register MFA with this access token
if(!$response.isAuthorized)
{
throw "User is not authorized to register MFA! Use -Verbose for details."
}
# Extract the session context and update headers
$sessionCtx = $response.sessionCtx
$headers["SessionCtx"] = $sessionCtx
# Get the needed codes
$response = Invoke-RestMethod -UseBasicParsing -Uri "https://account.activedirectory.windowsazure.com/securityinfo/InitializeMobileAppRegistration" -Method POST -Headers $headers -Body "{""securityInfoType"": $securityInfoType}"
# Strip the carbage from the start and convert to psobject
$response=$response.Substring($response.IndexOf("{")-1) | ConvertFrom-Json
# Add the session context to return value
$response | Add-Member -NotePropertyName "SessionCtx" -NotePropertyValue $sessionCtx
Write-Verbose "Registration info:`n$response"
# Return
return $response
}
}
# Sends a new MFA App activation
# Jul 2nd 2020
function Send-MFAAppNewActivation
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[String]$AccessToken,
[Parameter(Mandatory=$True)]
$RegistrationInfo,
[Parameter(Mandatory=$True)]
[String]$DeviceToken,
[Parameter(Mandatory=$False)]
[String]$DeviceName="AADInternals"
)
Process
{
$url = $RegistrationInfo.Url
# Append the PfPaWs.asmx if not included
if(!$Url.EndsWith($PfPaWs))
{
if(!$Url.EndsWith("/"))
{
$Url+="/";
}
$Url+=$PfPaWs;
}
# Create the headers
$headers=@{
"SOAPAction" = "http://www.phonefactor.com/PfPaWs/ActivateNew"
"Content-Type" = "text/xml; charset=utf-8"
"User-Agent" = "Dalvik/2.1.0 (Linux; U; Android 8.1.0; AADInternals)"
}
$body=@"
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns4="http://www.phonefactor.com/PfPaWs">
<soap:Header/>
<soap:Body>
<ns4:ActivateNew>
<ns4:activationParams>
<ns4:ActivationCode>$($RegInfo.ActivationCode)</ns4:ActivationCode>
<ns4:DeviceToken>$DeviceToken</ns4:DeviceToken>
<ns4:DeviceName>$DeviceName</ns4:DeviceName>
<ns4:OathCounter>$(Get-OathCounter)</ns4:OathCounter>
<ns4:Version>$Version</ns4:Version>
</ns4:activationParams>
</ns4:ActivateNew>
</soap:Body>
</soap:Envelope>
"@
# Send the activation request
$response = Invoke-RestMethod -UseBasicParsing -Uri $Url -Method POST -Headers $headers -Body $body
# Extract the activation information
$activationInformation=$response.Envelope.Body.ActivateNewResponse.activationInfo
Write-Verbose "Activation info:`n$activationInformation"
# Return
return $activationInformation
}
}
# Sends a new MFA App activation confirmation
# Jul 2nd 2020
function Send-MFAAppNewActivationConfirmation
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[String]$AccessToken,
[Parameter(Mandatory=$True)]
$RegistrationInfo,
[Parameter(Mandatory=$True)]
$ActivationInfo
)
Process
{
$url = $RegistrationInfo.Url
# Append the PfPaWs.asmx if not included
if(!$Url.EndsWith($PfPaWs))
{
if(!$Url.EndsWith("/"))
{
$Url+="/";
}
$Url+=$PfPaWs;
}
# Create the headers
$headers=@{
"SOAPAction" = "http://www.phonefactor.com/PfPaWs/ConfirmActivation"
"Content-Type" = "text/xml; charset=utf-8"
"User-Agent" = "Dalvik/2.1.0 (Linux; U; Android 8.1.0; AADInternals)"
}
# Create the body
$body=@"
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns4="http://www.phonefactor.com/PfPaWs">
<soap:Header/>
<soap:Body>
<ns4:ConfirmActivation>
<ns4:confirmationCode>$($ActivationInfo.ConfirmationCode)</ns4:confirmationCode>
</ns4:ConfirmActivation>
</soap:Body>
</soap:Envelope>
"@
# Send the activation confirmation
$response = Invoke-RestMethod -UseBasicParsing -Uri $Url -Method POST -Headers $headers -Body $body
Write-Verbose "Confirmation Activation: $($response.Envelope.Body.ConfirmActivationResponse.ConfirmActivationResult)"
# Return
return $response.Envelope.Body.ConfirmActivationResponse.ConfirmActivationResult -eq "true"
}
}
# Adds the new device
# Jul 2nd 2020
function Add-MFAAppAddDevice
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[String]$AccessToken,
[Parameter(Mandatory=$True)]
$RegistrationInfo,
[ValidateSet("APP","OTP")]
[String]$Type="APP"
)
Process
{
# Set the headers
$headers=@{
"Authorization" = "Bearer $AccessToken"
"SessionCtx" = $RegistrationInfo.SessionCtx
#"Access-Control-Request-Method" = "POST"
#"Access-Control-Request-Headers" ="ajaxrequest,authorization,content-type,sessionctx"
"Origin" = "https://mysignins.microsoft.com"
"Sec-Fetch-Site" = "cross-site"
"Sec-Fetch-Mode" = "cors"
"Sec-Fetch-Dest" = "empty"
"Content-Type" = "application/json"
}
if($Type -eq "APP")
{
$securityType = 2
$secretKey = $RegistrationInfo.ActivationCode
}
elseif($Type -eq "OTP")
{
$securityType = 3
$secretKey = $RegistrationInfo.SecretKey
}
$body="{""Type"":$securityType,""Data"":""{\""secretKey\"":\""$secretKey\"",\""affinityRegion\"":\""$($RegistrationInfo.AffinityRegion)\""}""}"
$state=0
$counter=0
# Loop until we get the context or fail for 10 times
while($state -ne 1 -and ($counter++) -lt 11)
{
# Wait
Start-Sleep -Seconds 2
Write-Verbose "Adding MFA application #$counter"
# Send the AddSecurityInfo request
$response = Invoke-RestMethod -UseBasicParsing -Method Post -Uri "https://account.activedirectory.windowsazure.com/securityinfo/AddSecurityInfo" -Headers $headers -Body $body
# Strip the carbage from the start and convert to psobject
$response=$response.Substring($response.IndexOf("{")-1) | ConvertFrom-Json
# Get the verification state
$state = $response.VerificationState
}
Write-Verbose "Verification context: $($response.VerificationContext)"
# Return
return $response.VerificationContext
}
}
# Sends MFA App verification request
# Jul 2nd 2020
function Verify-MFAAppAddDevice
{
[cmdletbinding()]
Param(
[Parameter(Mandatory=$True)]
[String]$AccessToken,
[Parameter(Mandatory=$True)]
$RegistrationInfo,
[Parameter(Mandatory=$True)]
[String]$VerificationContext,
[ValidateSet("APP","OTP")]
[String]$Type="APP"
)
Process
{
# Set the headers
$headers=@{
"Authorization" = "Bearer $AccessToken"
"SessionCtx" = $RegistrationInfo.SessionCtx
#"Access-Control-Request-Method" = "POST"
#"Access-Control-Request-Headers" ="ajaxrequest,authorization,content-type,sessionctx"
"Origin" = "https://mysignins.microsoft.com"
"Sec-Fetch-Site" = "cross-site"
"Sec-Fetch-Mode" = "cors"
"Sec-Fetch-Dest" = "empty"
"Content-Type" = "application/json"
}
if($Type -eq "APP")
{
$securityType = 2
$verificationData = $null
}
elseif($Type -eq "OTP")
{
$securityType = 3
$verificationData = (New-AADIntOTP -SecretKey $RegistrationInfo.SecretKey).OTP.replace(" ","")
Start-Sleep -Seconds 3
}
# Create the body
$body = "{""Type"":$securityType,""VerificationContext"":""$VerificationContext"",""VerificationData"":$verificationData}"
$state=0
$counter=0
$dataUpdates=""
# Loop until we get the data or fail for 10 times
while([string]::IsNullOrEmpty($dataUpdates) -and ($counter++) -lt 11)
{
# Wait
Start-Sleep -Seconds 2
Write-Verbose "Sending VerifySecurityInfo message #$counter"
# Send the VerifySecurityInfo message
$response = Invoke-RestMethod -UseBasicParsing -Method Post -Uri "https://account.activedirectory.windowsazure.com/securityinfo/VerifySecurityInfo" -Headers $headers -Body $body
# Strip the carbage from the start and convert to psobject
$responseBody=$response.Substring($response.IndexOf("{")-1) | ConvertFrom-Json
# Get the verification state
$dataUpdates = $responseBody.Dataupdates
}
Write-Verbose "Data Updates: $dataUpdates"
# Return
return $dataUpdates
}
}