shared/Invoke-AkamaiRestMethod.ps1
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#Requires -Version 3.0 <# Copyright 2019 Akamai Technologies, Inc. All Rights Reserved. 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. Author: Stuart Macleod Senior Technical Project Manager Akamai Technologies Inc. Adapted from Invoke-AkamaiOpen (https://github.com/akamai/AkamaiOPEN-edgegrid-powershell/blob/master/Invoke-AkamaiOPEN.ps1) Author: Josh Hicks Solutions Architect Akamai Technologies Inc. Copyright 2016 #> <# .SYNOPSIS EdgeGrid Powershell .DESCRIPTION Authorization wrapper around Invoke-RestMethod for use with Akamai's OPEN API initiative. .PARAMETER Method Request method. Valid values are GET, POST, PUT, and DELETE .PARAMETER Path Request path without hostname or scheme, but including any request parameters .PARAMETER EdgeRCFile File-based Auth - Authorization file to read credentials from. Defaults to ~/.edgerc .PARAMETER Section File-based Auth - Section in EdgeRC file to read credentials from. Defaults to [default] .PARAMETER Body Should contain the POST/PUT Body. The body should be structured like a JSON object. Example: $Body = '{ "name": "botlist2", "type": "IP", "list": ["201.22.44.12", "8.7.6.0/24"] }' .PARAMETER AdditionalHeaders Hashtable of additional request headers to add .PARAMETER Staging Image Manager requests only. Changes IM host from production to staging. For non-IM requests does nothing. .EXAMPLE Invoke-AkamaiRestMethod -Method GET -Path '/path/to/api?withParams=true' -EdgeRCFile ~/my.edgerc -Section 'papi' .LINK developer.akamai.com #> function Invoke-AkamaiRestMethod { param( [Parameter(Mandatory=$false)] [ValidateSet("GET", "PUT", "POST", "DELETE","PATCH")] [string] $Method = "GET", [Parameter(Mandatory=$true)] [string] $Path, [Parameter(Mandatory=$false)] $Body, [Parameter(Mandatory=$false)] [string] $InputFile, [Parameter(Mandatory=$false)] [string] $EdgeRCFile = '~\.edgerc', [Parameter(Mandatory=$false)] [string] $Section = 'default', [Parameter(Mandatory=$false)] [hashtable] $AdditionalHeaders, [Parameter(Mandatory=$false)] [boolean] $Staging, [Parameter(Mandatory=$false)] [string] $MaxBody = 131072, [Parameter(Mandatory=$false)] [string] $ResponseHeadersVariable ) # Get credentials from EdgeRC if(!(Test-Path $EdgeRCFile)){ throw "Error: EdgeRCFile $EdgeRCFile not found" } $EdgeRCContent = Get-Content $EdgeRCFile $Auth = @{} for($i = 0; $i -lt $EdgeRCContent.length; $i++){ $line = $EdgeRCContent[$i] if($line.contains("[") -and $line.contains("]")){ $SectionHeader = $Line.Substring($Line.indexOf('[')+1) $SectionHeader = $SectionHeader.SubString(0,$SectionHeader.IndexOf(']')) $Auth[$SectionHeader] = @{} $CurrentSection = $SectionHeader } if($line.ToLower().StartsWith("client_token")) { $Auth[$CurrentSection]['ClientToken'] = $line.Replace(" ","").SubString($line.IndexOf("=")) } if($line.ToLower().StartsWith("access_token")) { $Auth[$CurrentSection]['ClientAccessToken'] = $line.Replace(" ","").SubString($line.IndexOf("=")) } if($line.ToLower().StartsWith("host")) { $Auth[$CurrentSection]['Host'] = $line.Replace(" ","").SubString($line.IndexOf("=")) } if($line.ToLower().StartsWith("client_secret")){ $Auth[$CurrentSection]['ClientSecret'] = $line.Replace(" ","").SubString($line.IndexOf("=")) } } # Validate auth contents if($null -eq $Auth.$Section){ throw "Error: Config section [$Section] not found in $EdgeRCFile" } if($null -eq $Auth.$Section.ClientToken -or $null -eq $Auth.$Section.ClientAccessToken -or $null -eq $Auth.$Section.ClientSecret -or $null -eq $Auth.$Section.Host){ throw "Error: Some necessary auth elements missing from section $Section. Please check your EdgeRC file" } # Check actual edgerc entries if debug mode $EdgeRCMatch = "^akab-[a-z0-9]{16}-[a-z0-9]{16}" if($Auth.$Section.Host -notmatch $EdgeRCMatch){ Write-Debug "The 'host' attribute in the '$Section' section of your .edgerc file appears to be invalid" } if($Auth.$Section.ClientToken -notmatch $EdgeRCMatch){ Write-Debug "The 'client_token' attribute in the '$Section' section of your .edgerc file appears to be invalid" } if($Auth.$Section.ClientAccessToken -notmatch $EdgeRCMatch){ Write-Debug "The 'access_token' attribute in the '$Section' section of your .edgerc file appears to be invalid" } Write-Debug "Obtained credentials from section '$Section' of EdgeRC file $EdgeRCFile" # Set IM staging host if switch present if($Auth.$Section.Host.Contains('.imaging.') -and $Staging) { $Auth.$Section.Host = $Auth.$Section.Host.Replace(".imaging.",".imaging-staging.") } # Sanitise query string if($Path.Contains("?")){ $PathElements = $Path.Split("?") $PathOnly = $PathElements[0] $QueryString = $PathElements[1] $SanitisedQuery = Sanitise-QueryString -QueryString $QueryString Write-Debug "Original Query = $QueryString" Write-Debug "Sanitised Query = $SanitisedQuery" # Reconstruct Path if($SanitisedQuery){ $Path = $PathOnly + "?" + $SanitisedQuery } else{ $Path = $PathOnly } } # Set ReqURL from host and provided path $ReqURL = "https://" + $Auth.$Section.Host + $Path # ReqURL Verification If ($null -eq ($ReqURL -as [System.URI]).AbsoluteURI -or $ReqURL -notmatch "akamaiapis.net") { throw "Error: Invalid Request URI" } Write-Debug "Request URL = $ReqURL" # Sanitize Method param $Method = $Method.ToUpper() # Timestamp for request signing $TimeStamp = [DateTime]::UtcNow.ToString("yyyyMMddTHH:mm:sszz00") # GUID for request signing $Nonce = [GUID]::NewGuid() # Build data string for signature generation $SignatureData = $Method + "`thttps`t" $SignatureData += $Auth.$Section.Host + "`t" + $Path # Add body to signature. Truncate if body is greater than max-body (Akamai default is 131072). PUT Method does not require adding to signature. if($Method -eq "POST"){ if($Body) { $Body_SHA256 = [System.Security.Cryptography.SHA256]::Create() if($Body.Length -gt $MaxBody){ $Body_Hash = [System.Convert]::ToBase64String($Body_SHA256.ComputeHash([System.Text.Encoding]::ASCII.GetBytes($Body.Substring(0,$MaxBody)))) } else{ $Body_Hash = [System.Convert]::ToBase64String($Body_SHA256.ComputeHash([System.Text.Encoding]::ASCII.GetBytes($Body))) } $SignatureData += "`t`t" + $Body_Hash + "`t" } elseif($InputFile) { $Body_SHA256 = [System.Security.Cryptography.SHA256]::Create() $Bytes = Get-Content -AsByteStream $InputFile $Body_Hash = [System.Convert]::ToBase64String($Body_SHA256.ComputeHash($Bytes)) $SignatureData += "`t`t" + $Body_Hash + "`t" Write-Debug "Signature generated from input file $InputFile" } else { $SignatureData += "`t`t`t" } } else { $SignatureData += "`t`t`t" } $SignatureData += "EG1-HMAC-SHA256 " $SignatureData += "client_token=" + $Auth.$Section.ClientToken + ";" $SignatureData += "access_token=" + $Auth.$Section.ClientAccessToken + ";" $SignatureData += "timestamp=" + $TimeStamp + ";" $SignatureData += "nonce=" + $Nonce + ";" Write-Debug "SignatureData = $SignatureData" # Generate SigningKey $SigningKey = Crypto -secret $Auth.$Section.ClientSecret -message $TimeStamp # Generate Auth Signature $Signature = Crypto -secret $SigningKey -message $SignatureData # Create AuthHeader $AuthorizationHeader = "EG1-HMAC-SHA256 " $AuthorizationHeader += "client_token=" + $Auth.$Section.ClientToken + ";" $AuthorizationHeader += "access_token=" + $Auth.$Section.ClientAccessToken + ";" $AuthorizationHeader += "timestamp=" + $TimeStamp + ";" $AuthorizationHeader += "nonce=" + $Nonce + ";" $AuthorizationHeader += "signature=" + $Signature # Create IDictionary to hold request headers $Headers = @{} # Add Auth & Accept headers $Headers.Add('Authorization',$AuthorizationHeader) $Headers.Add('Accept','application/json') $Headers.Add('Content-Type', 'application/json; charset=utf-8') # Add additional headers if($AdditionalHeaders) { $AdditionalHeaders.Keys | foreach { $Headers[$_] = $AdditionalHeaders[$_] } } # Set ContentType param from Content-Type header. This is sent along with bodies to fix string encoding issues in IRM $ContentType = $Headers['Content-Type'] # Add additional headers if POSTing or PUTing If ($Body) { # turn off the "Expect: 100 Continue" header # as it's not supported on the Akamai side. [System.Net.ServicePointManager]::Expect100Continue = $false } # Set TLS version to 1.2 [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12 # Check for Proxy Env variable and use if present if($null -ne $ENV:https_proxy) { $UseProxy = $true } # Differentiate on PS 5 and later as PS 5's Invoke-RestMethod doesn't behave the same as the later versions if($PSVersionTable.PSVersion.Major -le 5){ if ($Method -eq "PUT" -or $Method -eq "POST" -or $Method -eq "PATCH") { try { if($Body){ if($UseProxy){ $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -Body $Body -Proxy $ENV:https_proxy } else { $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -Body $Body } } elseif($InputFile){ if($UseProxy){ $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -InFile $InputFile -Proxy $ENV:https_proxy } else { $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -InFile $InputFile } } else{ if($UseProxy){ $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -Proxy $ENV:https_proxy } else { $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType } } } catch { throw $_ } } else { # GET requests typically try{ if($UseProxy) { $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -MaximumRedirection 0 -ErrorAction SilentlyContinue -Proxy $ENV:https_proxy } else { $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -MaximumRedirection 0 -ErrorAction SilentlyContinue } # Redirects aren't well handled due to signatures needing regenerated if($null -ne ($Response.PSObject.members | where {$_.Name -eq "redirectLink"}) ){ Write-Debug "Redirecting to $($Response.redirectLink)" $Response = Invoke-AkamaiRestMethod -Method $Method -Path $Response.redirectLink -AdditionalHeaders $AdditionalHeaders -EdgeRCFile $EdgeRCFile -Section $Section } } catch{ throw $_.ErrorDetails } } } # PS 6+, the .net versions else{ if ($Method -eq "PUT" -or $Method -eq "POST" -or $Method -eq "PATCH") { try{ if($Body){ if($UseProxy){ $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -Body $Body -ResponseHeadersVariable $ResponseHeadersVariable -Proxy $ENV:https_proxy } else { $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -Body $Body -ResponseHeadersVariable $ResponseHeadersVariable } } elseif($InputFile) { if($UseProxy){ $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -InFile $InputFile -ResponseHeadersVariable $ResponseHeadersVariable -Proxy $ENV:https_proxy } else{ $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -InFile $InputFile -ResponseHeadersVariable $ResponseHeadersVariable } } else{ if($UseProxy){ $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -ResponseHeadersVariable $ResponseHeadersVariable -Proxy $ENV:https_proxy } else{ $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -ResponseHeadersVariable $ResponseHeadersVariable } } } catch{ throw $_.ErrorDetails } } else { # GET requests typically try { if($UseProxy) { $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -ResponseHeadersVariable $ResponseHeadersVariable -MaximumRedirection 0 -ErrorAction Stop -Proxy $ENV:https_proxy } else { $Response = Invoke-RestMethod -Method $Method -Uri $ReqURL -Headers $Headers -ContentType $ContentType -ResponseHeadersVariable $ResponseHeadersVariable -MaximumRedirection 0 -ErrorAction Stop } } catch { # Redirects aren't well handled due to signatures needing regenerated if($_.Exception.Response.StatusCode.value__ -eq 301 -or $_.Exception.Response.StatusCode.value__ -eq 302) { try { $NewPath = $_.Exception.Response.Headers.Location.PathAndQuery Write-Debug "Redirecting to $NewPath" $Response = Invoke-AkamaiRestMethod -Method $Method -Path $NewPath -AdditionalHeaders $AdditionalHeaders -EdgeRCFile $EdgeRCFile -Section $Section -ResponseHeadersVariable $ResponseHeadersVariable } catch { throw $_ } } else { throw $_.ErrorDetails } } } # Set ResponseHeadersVariable to be passed back to requesting function if($ResponseHeadersVariable){ Set-Variable -name $ResponseHeadersVariable -Value (Get-Variable -Name $ResponseHeadersVariable -ValueOnly) -Scope Script } } Return $Response } |