private static void ProcessConfig(OciDescriptor config)
{
// media types are case insensitive
if (!string.Equals(config.MediaType, BicepMediaTypes.BicepModuleConfigV1, MediaTypeComparison))
{
throw new InvalidModuleException($"Did not expect config media type \"{config.MediaType}\".");
}
if (config.Size != 0)
{
throw new InvalidModuleException("Expected an empty config blob.");
}
}
private static async Task <Stream> ProcessLayer(BicepRegistryBlobClient client, OciDescriptor layer)
{
if (!string.Equals(layer.MediaType, BicepMediaTypes.BicepModuleLayerV1Json, MediaTypeComparison))
{
throw new InvalidModuleException($"Did not expect layer media type \"{layer.MediaType}\".");
}
Response <DownloadBlobResult> blobResult;
try
{
blobResult = await client.DownloadBlobAsync(layer.Digest);
}
catch (RequestFailedException exception) when(exception.Status == 404)
{
throw new InvalidModuleException($"Module manifest refers to a non-existent blob with digest \"{layer.Digest}\".", exception);
}
ValidateBlobResponse(blobResult, layer);
return(blobResult.Value.Content);
}
private static void ValidateBlobResponse(Response <DownloadBlobResult> blobResponse, OciDescriptor descriptor)
{
var stream = blobResponse.Value.Content;
if (descriptor.Size != stream.Length)
{
throw new InvalidModuleException($"Expected blob size of {descriptor.Size} bytes but received {stream.Length} bytes from the registry.");
}
stream.Position = 0;
string digestFromContents = DigestHelper.ComputeDigest(DigestHelper.AlgorithmIdentifierSha256, stream);
stream.Position = 0;
if (!string.Equals(descriptor.Digest, digestFromContents, DigestComparison))
{
throw new InvalidModuleException($"There is a mismatch in the layer digests. Received content digest = {digestFromContents}, Requested digest = {descriptor.Digest}");
}
}
