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handle azure keyvault throttling with retry logic #275

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handle azure keyvault throttling with retry logic #275

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1 change: 1 addition & 0 deletions Directory.Packages.props
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@
<PackageVersion Include="Microsoft.Extensions.Logging" Version="8.0.0" />
<PackageVersion Include="Microsoft.Extensions.Logging.Console" Version="8.0.0" />

<PackageVersion Include="Polly" Version="8.4.2" />
<PackageVersion Include="System.Net.Http" Version="4.3.4" />
<PackageVersion Include="System.Text.Json" Version="8.0.4" />
<PackageVersion Include="System.Text.RegularExpressions" Version="4.3.1" />
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1 change: 1 addition & 0 deletions src/AzureSignTool/AzureSignTool.csproj
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Expand Up @@ -20,6 +20,7 @@
<PackageReference Include="Azure.Security.KeyVault.Certificates" />
<PackageReference Include="Azure.Security.KeyVault.Keys" />
<PackageReference Include="Microsoft.Extensions.FileSystemGlobbing" />
<PackageReference Include="Polly" />
<PackageReference Include="XenoAtom.CommandLine" />
<PackageReference Include="Microsoft.Extensions.Logging" />
<PackageReference Include="Microsoft.Extensions.Logging.Console" />
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2 changes: 2 additions & 0 deletions src/AzureSignTool/HRESULT.cs
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Expand Up @@ -12,5 +12,7 @@ internal static class HRESULT
public const int E_ALL_FAILED = unchecked((int)0xA0000002);

public const int TRUST_E_SUBJECT_FORM_UNKNOWN = unchecked((int)0x800B0003);

public const int E_VAULT_THROTTLING = unchecked((int)0x801901AD);
}
}
16 changes: 15 additions & 1 deletion src/AzureSignTool/Program.cs
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Expand Up @@ -14,6 +14,8 @@
using Microsoft.Extensions.FileSystemGlobbing.Abstractions;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Console;
using Polly.Retry;
using Polly;
using XenoAtom.CommandLine;

using static AzureSignTool.HRESULT;
Expand Down Expand Up @@ -176,6 +178,18 @@ public SignCommand() : base("sign", "Sign a file.", null)
Action = Run;
}

// retry strategy for Keyvault throttling errors
// https://learn.microsoft.com/en-us/azure/key-vault/general/overview-throttling
private readonly ResiliencePipeline _resiliencePipeline = new ResiliencePipelineBuilder()
.AddRetry(new RetryStrategyOptions
{
ShouldHandle = new PredicateBuilder().HandleResult(result => (int)result == E_VAULT_THROTTLING),
BackoffType = DelayBackoffType.Exponential,
MaxRetryAttempts = 4,
Delay = TimeSpan.FromSeconds(2)
})
.Build();

private ValueTask<int> Run(CommandRunContext context, string[] arguments)
{
if (ValidateArguments(context))
Expand Down Expand Up @@ -320,7 +334,7 @@ private async ValueTask<int> RunSign()
return (state.succeeded + 1, state.failed);
}

var result = signer.SignFile(filePath, SignDescription, SignDescriptionUrl, performPageHashing, logger, appendSignature);
var result = _resiliencePipeline.Execute(() => signer.SignFile(filePath, SignDescription, SignDescriptionUrl, performPageHashing, logger, appendSignature));
switch (result)
{
case COR_E_BADIMAGEFORMAT:
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