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[microsoft/release-branch.go1.22] Update 1.22 release notes #1132

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Feb 7, 2024
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[microsoft/release-branch.go1.22] Update 1.22 release notes #1132

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Update 1.22 release notes
dagood Feb 7, 2024
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Update docs/go1.22.md
dagood Feb 7, 2024
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22 changes: 22 additions & 0 deletions docs/go1.22.md
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# Microsoft Go 1.22 release notes

After the release of 1.22, 1.20 is no longer supported, per the [Go release policy](https://go.dev/doc/devel/release).

## Automatically configure TLS settings in FIPS mode

The crypto backends now automatically restrict the Go TLS stack's settings to allow only FIPS-compliant algorithms when running in FIPS mode.

In previous releases, adding `import _ "crypto/tls/fipsonly"` to a program's source code enables FIPS-compliant TLS, and this is no longer necessary.

For more details, see the [FIPS readme](https://github.com/microsoft/go/blob/microsoft/main/eng/doc/fips/README.md).

## New crypto algorithm backend support

Additional packages are now supported by the OpenSSL and CNG crypto backends:

* crypto/des
* crypto/ed25519
* crypto/md5
* crypto/rc4

The TLS PRF and HKDF algorithms internally used in `crypto/tls` are also now implemented by the crypto backends.

Not every algorithm implemented by a crypto backend is necessarily allowed in a FIPS-compliant program.
For more details about each algorithm, see the [FIPS User guide](https://github.com/microsoft/go/blob/microsoft/main/eng/doc/fips/UserGuide.md).
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