} else {
		head = make([]byte, total)
		copy(head, in)
	}
	tail = head[len(in):]
	return
}

// encrypt encrypts payload, adding the appropriate nonce and/or MAC, and
// appends it to record, which must already contain the record header.
func (hc *halfConn) encrypt(record, payload []byte, rand io.Reader) ([]byte, error) {
	if hc.cipher == nil {
		return append(record, payload...), nil
	}

		apiErr = ErrInvalidEncryptionParametersSSEC
	case crypto.ErrInvalidEncryptionMethod:
		apiErr = ErrInvalidEncryptionMethod
	case crypto.ErrInvalidEncryptionKeyID:
		apiErr = ErrInvalidEncryptionKeyID
	case crypto.ErrInvalidCustomerAlgorithm:
		apiErr = ErrInvalidSSECustomerAlgorithm
	case crypto.ErrMissingCustomerKey:
		apiErr = ErrMissingSSECustomerKey
	case crypto.ErrMissingCustomerKeyMD5:

func TestWeakKeys(t *testing.T) {
	for i, tt := range weakKeyTests {
		var encrypt = func(in []byte) (out []byte) {
			c := newCipher(tt.key)
			out = make([]byte, len(in))
			c.Encrypt(out, in)
			return
		}

		// Encrypting twice with a DES weak
		// key should reproduce the original input
		result := encrypt(tt.in)
		result = encrypt(result)

		if !bytes.Equal(result, tt.in) {

// license that can be found in the LICENSE file.

package tls

import (
	"bytes"
	"container/list"
	"context"
	"crypto"
	"crypto/ecdsa"
	"crypto/ed25519"
	"crypto/elliptic"
	"crypto/rand"
	"crypto/rsa"
	"crypto/sha512"
	"crypto/x509"
	"errors"
	"fmt"
	"internal/godebug"
	"io"
	"net"
	"slices"
	"strings"
	"sync"
	"time"
	_ "unsafe" // for linkname
)

	"k8s.io/apiserver/pkg/features"
	"k8s.io/apiserver/pkg/storage/value"
	"k8s.io/apiserver/pkg/storage/value/encrypt/envelope"
	envelopekmsv2 "k8s.io/apiserver/pkg/storage/value/encrypt/envelope/kmsv2"
	kmstypes "k8s.io/apiserver/pkg/storage/value/encrypt/envelope/kmsv2/v2"
	"k8s.io/apiserver/pkg/storage/value/encrypt/envelope/metrics"
	utilfeature "k8s.io/apiserver/pkg/util/feature"

====

[[config_cache:secrets:generating_encryption_key]]
=== Generating an encryption key that is compatible with GRADLE_ENCRYPTION_KEY

For Gradle to encrypt the configuration cache using a user-specified encryption key,
you must run Gradle while having the GRADLE_ENCRYPTION_KEY environment variable set with a valid AES key, encoded as a Base64 string.

One way of generating a Base64-encoded AES-compatible key is by using a command like this:

golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package tls

import (
	"bytes"
	"context"
	"crypto"
	"crypto/ecdsa"
	"crypto/elliptic"
	"crypto/rand"
	"crypto/x509"
	"crypto/x509/pkix"
	"encoding/asn1"
	"encoding/json"
	"encoding/pem"
	"errors"
	"fmt"
	"internal/testenv"
	"io"
	"math"
	"math/big"
	"net"
	"os"
	"reflect"

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"archive/zip"
	"bufio"
	"bytes"
	"context"
	"crypto/ecdsa"
	"crypto/hmac"
	crand "crypto/rand"
	"crypto/rsa"
	"crypto/sha1"
	"crypto/tls"
	"crypto/x509"
	"crypto/x509/pkix"
	"encoding/base64"
	"encoding/hex"
	"encoding/pem"
	"encoding/xml"
	"errors"
	"flag"
	"fmt"
	"io"
	"math/big"
	"math/rand"

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package tls

import (
	"bytes"
	"context"
	"crypto/ecdsa"
	"crypto/elliptic"
	"crypto/rand"
	"crypto/rsa"
	"crypto/x509"
	"crypto/x509/pkix"
	"encoding/base64"
	"encoding/hex"
	"encoding/pem"
	"errors"
	"fmt"
	"internal/byteorder"
	"io"
	"math/big"
	"net"
	"os"
	"os/exec"