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      unless required by applicable law (such as deliberate and grossly

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      risks associated with Your exercise of permissions under this License.

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      unless required by applicable law (such as deliberate and grossly

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      risks associated with Your exercise of permissions under this License.

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	ErrInvalidCustomerAlgorithm = Errorf("The SSE-C algorithm is not supported")

	// ErrMissingCustomerKey indicates that the HTTP headers contains no SSE-C client key.
	ErrMissingCustomerKey = Errorf("The SSE-C request is missing the customer key")

	// ErrMissingCustomerKeyMD5 indicates that the HTTP headers contains no SSE-C client key
	// MD5 checksum.
	ErrMissingCustomerKeyMD5 = Errorf("The SSE-C request is missing the customer key MD5")

	IsEncrypted(map[string]string) bool
}

// IsRequested returns true and the SSE Type if the HTTP headers
// indicate that some form server-side encryption is requested.
//
// If no SSE headers are present then IsRequested returns false
// and no Type.
func IsRequested(h http.Header) (Type, bool) {
	switch {
	case S3.IsRequested(h):
		return S3, true
	case S3KMS.IsRequested(h):
		return S3KMS, true
	case SSEC.IsRequested(h):