Update-AADToolkitApplicationCredentials.ps1

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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
function Show-AppInfo ($appInfo){
    Write-Host
    $appDisplay = $appInfo | Format-List -Property objectType, objectId, displayName, appId | Out-String
    $appCreds = $appInfo.creds | Format-Table -Property keyId, startDateTime, endDateTime, expired, credentialtype, description | Out-String
    Write-Host $appDisplay
    Write-Host $appCreds
}
function Show-Menu {
    Param($appInfo,
        [string[]]$MenuItems,
        [string] $Title
    )

    $header = $null
    if (![string]::IsNullOrWhiteSpace($Title)) {
        $len = [math]::Max(($MenuItems | Measure-Object -Maximum -Property Length).Maximum, $Title.Length)
        $header = '{0}{1}{2}' -f $Title, [Environment]::NewLine, ('-' * $len)
    }

    # possible choices: didits 1 to 9, characters A to Z
    $choices = (49..57) + (65..90) | ForEach-Object { [char]$_ }
    $i = 0
    $items = ($MenuItems | ForEach-Object { '[{0}] {1}' -f $choices[$i++], $_ }) -join [Environment]::NewLine

    # display the menu and return the chosen option
    while ($true) {
        Clear-Host
        
        if ($header) { Write-Host $header -ForegroundColor Yellow }        
        Write-Host $items
        Show-AppInfo $appInfo
        Write-Host

        $answer = (Read-Host -Prompt 'Please make your choice').ToUpper()
        $index  = $choices.IndexOf($answer[0])

        if ($index -ge 0 -and $index -lt $MenuItems.Count) {
            return $MenuItems[$index]
        }
        else {
            Write-Warning "Invalid choice.. Please try again."
            Start-Sleep -Seconds 2
        }
    }
}
function Get-CredentialInfo ($cred, $credentialType)
{
    $expired = "No"
    if(Get-IsExpired -date $cred.endDateTime){
        $expired = "Yes"
    }
    [pscustomobject]@{
        CredentialType = $credentialType
        KeyId = $cred.keyId
        Hint = $cred.hint
        Description = $cred.displayName
        StartDateTime = $cred.startDateTime
        EndDateTime = $cred.endDateTime
        KeyType = $cred.type
        Usage = $cred.usage
        Expired = $expired
    }
}
function Invoke-CredentialRollover ($appInfo, $keyId){
    $rolloverKey = $appInfo.Creds | Where-Object {$_.KeyId -eq $keyId}
    if($rolloverKey)
    {
        switch ($rolloverKey.CredentialType) {
            $credentialTypePassword { 
                Add-Password -objectId $appInfo.objectId $appInfo.objectType
                Remove-Password -objectId $appInfo.objectId -objectType $appInfo.objectType -keyId $rolloverKey.keyId                
             }            
            $credentialTypeKey {
                $certFilePath = Read-Host -Prompt 'Enter the path to the certificate file'
                $appInfo.keyCredentials = $appInfo.keyCredentials | Where-Object {$_.keyId -ne $keyId}
                Add-Key -objectId $appInfo.objectId $appInfo.objectType -certFilePath $certFilePath
            }
        }
    }
    else {
        Write-Error "Secret or certificate with this KeyId was not found." -ErrorAction Stop
    }
}

function Get-IsExpired($date){
    return (Get-Date).Subtract($date) -gt 0
}
function Remove-AppCredentials($appInfo, $selection)
{    
    switch ($selection) {
        $menuRemoveAll          { $credsToRemove = $appInfo.Creds }
        $menuRemoveSecrets      { $credsToRemove = $appInfo.Creds | Where-Object {$_.CredentialType -eq $credentialTypePassword} }
        $menuRemoveCerts        { $credsToRemove = $appInfo.Creds | Where-Object {$_.CredentialType -eq $credentialTypeKey} }
        $menuRemoveExpiredAll   { $credsToRemove = $appInfo.Creds | Where-Object {Get-IsExpired -date $_.endDateTime } }
        $menuRemoveExpiredSecrets{ $credsToRemove = $appInfo.Creds | Where-Object {(Get-IsExpired -date $_.endDateTime) -and $_.CredentialType -eq $credentialTypePassword } }
        $menuRemoveExpiredCerts { $credsToRemove = $appInfo.Creds | Where-Object {(Get-IsExpired -date $_.endDateTime) -and $_.CredentialType -eq $credentialTypeKey } }
    }

    # Remove passwords
    foreach($cred in $credsToRemove){
        if($cred.CredentialType -eq $credentialTypePassword){
            Remove-Password -objectId $appInfo.objectId -objectType $appInfo.objectType -keyId $cred.keyId
        }
    }
    # Remove keys
    Remove-Keys -appInfo $appInfo -credsToRemove $credsToRemove
}
function Remove-Keys ($appInfo, $credsToRemove) {
    $keyCredsToRemove = $credsToRemove | Where-Object {$_.CredentialType -eq $credentialTypeKey}
    if($keyCredsToRemove.Length -gt 0){
        foreach($cred in $keyCredsToRemove)
        {
            Write-Host ("Removing certificate ({0}) from {1} ({2})" -f $cred.keyId, $appInfo.ObjectType, $appInfo.ObjectId)
            $appInfo.keyCredentials = $appInfo.keyCredentials | Where-Object {$_.keyId -ne $cred.keyId}
        }
        if($appInfo.keyCredentials.Length -eq 0){ # Convert null to an empty array to generate a Graph compatible json
            $appInfo.KeyCredentials = @()
        }
        $body = @{keyCredentials = $appInfo.KeyCredentials} | ConvertTo-Json
        
        $uri = '/{0}/{1}' -f $appInfo.GraphObjectType, $appInfo.objectId
        Invoke-AADTGraph -uri $uri -body $body -method PATCH
    }    
}
function Remove-Password($objectId, $objectType, $keyId){
    Write-Host ("Removing client secret ({0}) from {1} ({2})" -f $keyId, $objectType, $objectId)
    switch ($objectType) {
        $objectTypeApplication { $graphObjectType = 'applications' }
        $objectTypeServicePrincipal { $graphObjectType = 'servicePrincipals' }
    }
    $uri = "/$graphObjectType/$objectId/removePassword"

    $body = @{keyId=$keyId} | ConvertTo-Json
    
    Invoke-AADTGraph -uri $uri -method POST -body $body
}

function Add-Password($objectId, $objectType){
    Write-Host ("Rolling over client secret for {0} ({1})" -f $objectType, $objectId)
    switch ($objectType) {
        $objectTypeApplication { $graphObjectType = 'applications' }
        $objectTypeServicePrincipal { $graphObjectType = 'servicePrincipals' }
    }
    $uri = "/$graphObjectType/$objectId/addPassword"

    $body = @{passwordCredential = @{displayName="Rollover"; endDateTime=((Get-Date).AddYears(1).ToString('s'))} } | ConvertTo-Json
    Write-Host $body
    Invoke-AADTGraph -uri $uri -method POST -body $body
}

function Add-Key($objectId, $objectType, $certFilePath){
    Write-Host ("Rolling over certificate for {0} ({1})" -f $objectType, $objectId)
    switch ($objectType) {
        $objectTypeApplication { $graphObjectType = 'applications' }
        $objectTypeServicePrincipal { $graphObjectType = 'servicePrincipals' }
    }
    $uri = "/$graphObjectType/$objectId/addKey"
    
    $cer = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2($certFilePath)
    $bin = $cer.GetRawCertData()
    $base64Value = [System.Convert]::ToBase64String($bin)
    $bin = $cer.GetCertHash()
    $base64Thumbprint = [System.Convert]::ToBase64String($bin)
    $keyId = [System.Guid]::NewGuid().ToString() 
    $newKeyCredential = @{
        customKeyIdentifier = $base64Thumbprint
        displayName = 'Rollover'
        keyId = $keyId
        type = 'AsymmetricX509Cert'
        usage = 'Verify'        
        key = $base64Value
    }
    $appInfo.KeyCredentials += $newKeyCredential

    $body = @{keyCredentials = $appInfo.KeyCredentials} | ConvertTo-Json
    $uri = '/{0}/{1}' -f $appInfo.GraphObjectType, $appInfo.objectId
    Invoke-AADTGraph -uri $uri -body $body -method PATCH
}

function Get-GraphSearchResults($type, $searchObjectId){
    $searchValue = "'$searchObjectId'"
    $uri = '/{0}?$filter=id eq {1} or id eq {1}' -f $type, $searchValue #Repear with or to avoid PowerShell Graph SDK throwing errors when there are no entries
    return Invoke-AADTGraph -uri $uri
}
function Get-GraphApp($searchObjectId){
    $result = Get-GraphSearchResults -type $graphObjectTypeApplications -searchObjectId $searchObjectId
    
    if($result.value.length -eq 1){
        $ObjectType = $objectTypeApplication
        $graphObjectType = $graphObjectTypeApplications
        $app = $result.value
    }
    else {
        Write-Host "Not an app checking ServicePrincipals"
        $result = Get-GraphSearchResults -type $graphObjectTypeServicePrincipals -searchObjectId $searchObjectId
        if($result.value.length -eq 1){
            $ObjectType = $objectTypeServicePrincipal
            $graphObjectType = $graphObjectTypeServicePrincipals
            $app = $result.value
        }
        else {
            Write-Error "ObjectId not found" -ErrorAction Stop
        }
    }
    $creds = @()
    foreach($cred in $app.passwordCredentials)
    {
        $creds += Get-CredentialInfo -cred $cred -credentialType $credentialTypePassword
    }
    foreach($cred in $app.keyCredentials)
    {
        $creds += Get-CredentialInfo -cred $cred -credentialType $credentialTypeKey
    }
    [pscustomobject]@{
        ObjectType = $objectType
        GraphObjectType = $graphObjectType
        Creds = $creds
        KeyCredentials = $app.keyCredentials #Until GraphAPI supports removing KeyCredentials, need to cache the KeyCredentials and use them with a PATCH
        ObjectId = $app.id
        DisplayName = $app.displayName
        AppId = $app.appId
    }
}

function Update-AADToolkitApplicationCredentials
{
    $searchObjectId = Read-Host -Prompt 'Enter the ObjectId of the Application or Service Principal'

    $objectTypeApplication = 'Application'
    $objectTypeServicePrincipal = 'Service Principal'
    $graphObjectTypeApplications = 'applications'
    $graphObjectTypeServicePrincipals = 'servicePrincipals'
    $credentialTypePassword = 'Client secret'
    $credentialTypeKey = 'Certificate'
    $menuRemoveAll = 'Remove all certificates and secrets'
    $menuRemoveCerts = 'Remove all certificates'
    $menuRemoveSecrets = 'Remove all secrets'
    $menuRemoveExpiredAll = 'Remove expired certificates and secrets'
    $menuRemoveExpiredCerts = 'Remove expired certificates'
    $menuRemoveExpiredSecrets = 'Remove expired secrets'
    $menuRolloverCred = 'Rollover a certificate or secret'
    $menuQuit = 'Quit'


    if(![guid]::TryParse($searchObjectId, $([ref][guid]::Empty)))
    {
        Write-Error "Invalid object identifier format" -ErrorAction Stop
    }
    else
    {
        $appInfo = Get-GraphApp -searchObjectId $searchObjectId
        if(!$appInfo){
            Write-Error "Application or ServicePrincipal with this ObjectId was not found"
        }
        Show-AppInfo $appInfo

        ##TODO Filter to show options applicable for the selected app
        $menu = $menuRemoveAll, $menuRemoveCerts, $menuRemoveSecrets, $menuRemoveExpiredAll, $menuRemoveExpiredCerts, $menuRemoveExpiredSecrets, $menuRolloverCred, $menuQuit
        $selection = Show-Menu -appInfo $appInfo  -MenuItems $menu -Title "What would you like to do?"
        
        switch ($selection) {
            {$_ -in $menuRemoveAll, $menuRemoveCerts, $menuRemoveSecrets, $menuRemoveExpiredAll, $menuRemoveExpiredCerts, $menuRemoveExpiredSecrets}{
                Remove-AppCredentials -appInfo $appInfo -selection $selection
            }
            $menuRolloverCred {
                $rolloverKeyId = Read-Host -Prompt 'Enter the KeyId of the client secret or certificate to be rolled over'
                Invoke-CredentialRollover -appInfo $appInfo -keyId $rolloverKeyId
            }
        }
    }
}