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Sync eng/common directory with azure-sdk-tools for PR 13875 #45038

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Sync eng/common directory with azure-sdk-tools for PR 13875 #45038

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18 changes: 13 additions & 5 deletions eng/common/scripts/login-to-github.ps1
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Original file line number Diff line number Diff line change
Expand Up @@ -57,9 +57,17 @@ function New-GitHubAppJwt {
[Parameter(Mandatory)] [string] $AppId
)

function Base64UrlEncode($json) {
$bytes = [System.Text.Encoding]::UTF8.GetBytes($json)
$base64 = [Convert]::ToBase64String($bytes)
function Base64UrlEncode {
param(
[string]$Data,
[switch]$IsBase64String
)
if ($IsBase64String) {
$base64 = $Data
} else {
$bytes = [System.Text.Encoding]::UTF8.GetBytes($Data)
$base64 = [Convert]::ToBase64String($bytes)
}
return $base64.TrimEnd('=') -replace '\+', '-' -replace '/', '_'
}

Expand All @@ -70,7 +78,7 @@ function New-GitHubAppJwt {
}
$Now = [int][double]::Parse((Get-Date -UFormat %s))
$Payload = @{
iat = $Now
iat = $Now - 10 # 10 seconds clock skew
exp = $Now + 600 # 10 minutes
iss = $AppId
}
Expand All @@ -97,7 +105,7 @@ function New-GitHubAppJwt {
throw "Azure Key Vault response does not contain a signature. Response: $($SignResultJson | ConvertTo-Json -Compress)"
}

$Signature = $SignResultJson.signature
$Signature = Base64UrlEncode -Data $SignResultJson.signature -IsBase64String
return "$UnsignedToken.$Signature"
}

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