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4.1.0.0

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@aws-sdk-automation aws-sdk-automation released this 12 Nov 00:17
· 29 commits to main since this release
4.1.0.0
6f2eaf6

4.1.0.0 (2026-11-11 23:14 UTC)

  • S3 (4.1.0.0)
    • Fixed a bug where TransferUtility.Download/DownloadAsync (the non-multipart path) always waited 100ms after a successful download. The backoff delay now only applies before an actual retry, and the async path uses a non-blocking await instead of a blocking Thread.Sleep.
  • Extensions.CborProtocol (4.1.0.0)
    • Added Smithy RPC v2 CBOR support for the byte, short, bigInteger and bigDecimal types (Full Numeric Type Support specification): byte and short as CBOR integers, bigInteger as a bignum (tags 2/3) and bigDecimal as a decimal fraction (tag 4) via the new CborWriterExtensions.WriteBigDecimal.
  • Extensions.Numerics (4.1.0.0)
    • Breaking Change: The assembly now has AssemblyVersion 4.0.0.0 and AssemblyFileVersion 4.0.0.x. Version 4.0.0.2 shipped with 0.0.0.0 because the project was missing Properties/AssemblyInfo.cs, so the version from _sdk-versions.json was never applied.
  • Core 4.1.0.0
    • Added AWS4aSigner class that implements SigV4a signing in managed code. AWS CRT is no longer used by the SDK for this purpose, and the related APIs were deprecated.
    • Added build targets for .NET 10 and .NET 11
    • Added support for the byte, short, bigInteger and bigDecimal model types (Full Numeric Type Support specification): byte maps to sbyte, short to short, bigInteger to System.Numerics.BigInteger and bigDecimal to Amazon.Extensions.Numerics.BigDecimal, serialized without losing digits or scale.
    • AWSSDK.Core now depends on AWSSDK.Extensions.Numerics, which provides BigDecimal.
    • Breaking Change: Removed support .NET Core 3.1
    • Fixed a buffer overflow in ChunkedUploadWrapperStream when an encrypting stream is uploaded with a buffer size that does not divide the chunk size, and reduced the per-chunk allocations of chunked uploads.
    • Reduce CPU and memory used by checksums and chunked uploads: stop allocating per 64-byte block in the managed MD5 used to validate GetObject responses, size aws-chunked upload buffers to small payloads, stop allocating a temporary buffer per read when sending trailing checksums, and compute CRC32 with a faster slicing-by-16 implementation on targets where System.IO.Hashing is not vectorized (.NET 8, .NET Standard and .NET Framework).
    • Replace checksum provider from the native Amazon Common Runtime to System.IO.Hashing
    • All service and extension packages updated to require new Core
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