//
// All objects are encrypted with an unique and randomly generated 'ObjectKey'.
// The ObjectKey itself is never stored in plaintext. Instead it is only stored
// in a sealed from. The sealed 'ObjectKey' is created by encrypting the 'ObjectKey'
// with an unique key-encryption-key. Given the correct key-encryption-key the
// sealed 'ObjectKey' can be unsealed and the object can be decrypted.
//
// ## SSE-C
//

	"github.com/minio/sio"
)

// ObjectKey is a 256 bit secret key used to encrypt the object.
// It must never be stored in plaintext.
type ObjectKey [32]byte

// GenerateKey generates a unique ObjectKey from a 256 bit external key
// and a source of randomness. If random is nil the default PRNG of the
// system (crypto/rand) is used.
func GenerateKey(extKey []byte, random io.Reader) (key ObjectKey) {
	if random == nil {

	}
}

var decryptETagTests = []struct {
	ObjectKey  crypto.ObjectKey
	ObjectInfo ObjectInfo
	ShouldFail bool
	ETag       string
}{
	{
		ObjectKey:  [32]byte{},
		ObjectInfo: ObjectInfo{ETag: "20000f00f27834c9a2654927546df57f9e998187496394d4ee80f3d9978f85f3c7d81f72600cdbe03d80dc5a13d69354"},
		ETag:       "8ad3fe6b84bf38489e95c701c84355b6",
	},
	{
		ObjectKey:  [32]byte{},

func (i *Identifier) String() string {
	if i.Unquoted != nil {
		return *i.Unquoted
	}
	return string(*i.Quoted)
}

func (o *ObjectKey) String() string {
	if o.Lit != nil {
		return fmt.Sprintf("['%s']", string(*o.Lit))
	}
	return fmt.Sprintf(".%s", o.ID.String())
}

func (o *ObjectKey) keyString() string {
	if o.Lit != nil {
		return string(*o.Lit)
	}
	return o.ID.String()
}

            for (final S3Object s3Object : response.contents()) {
                final String objectKey = s3Object.key();
                // Skip directory markers (objects ending with /)
                if (!objectKey.endsWith("/")) {
                    final String fileName = getName(objectKey);
                    final ZonedDateTime lastModified =

	if k == nil {
		return nil, Errorf("KMS not configured")
	}

	if len(metadata) != len(buckets) || len(metadata) != len(objects) {
		return nil, Errorf("invalid metadata/object count: %d != %d != %d", len(metadata), len(buckets), len(objects))
	}
	keys := make([]ObjectKey, 0, len(metadata))
	for i := range metadata {

	// Remove enclosing parenthesis.
	n := len(values[0])
	r := values[0][1 : n-1]
	// Translate doubled quotes
	*ls = LiteralList(strings.Split(r, ","))
	return nil
}

// ObjectKey is a type for parsed strings occurring in key paths
type ObjectKey struct {
	Lit *LiteralString `parser:" \"[\" @LitString \"]\""`
	ID  *Identifier    `parser:"| \".\" @@"`
}

// QuotedIdentifier is a type for parsed strings that are double
// quoted.

	{PartID: 10000, PartKey: "f86e65c396ed52d204ee44bd1a0bbd86eb8b01b7354e67a3b3ae0e34dd5bd115"},
}

func TestDerivePartKey(t *testing.T) {
	var key ObjectKey
	for i, test := range derivePartKeyTest {
		expectedPartKey, err := hex.DecodeString(test.PartKey)
		if err != nil {
			t.Fatalf("Test %d failed to decode expected part-key: %v", i, err)
		}

	"net/url"
	"strings"
	"testing"
	"time"

	"github.com/dustin/go-humanize"
)

const (
	iso8601DateFormat = "20060102T150405Z"
)

func newPostPolicyBytesV4WithContentRange(credential, bucketName, objectKey string, expiration time.Time) []byte {
	t := UTCNow()
	// Add the expiration date.
	expirationStr := fmt.Sprintf(`"expiration": "%s"`, expiration.Format(iso8601TimeFormat))

// from the metadata using the SSE-C client key of the HTTP headers
// and returns the decrypted object key.
func (s3 ssec) UnsealObjectKey(h http.Header, metadata map[string]string, bucket, object string) (key ObjectKey, err error) {
	clientKey, err := s3.ParseHTTP(h)
	if err != nil {
		return key, err
	}
	return unsealObjectKey(clientKey[:], metadata, bucket, object)
}