Documentation: http://docs.aws.amazon.com/AmazonS3/latest/dev/ServerSideEncryptionCustomerKeys.html
Documentation: http://docs.aws.amazon.com/AmazonS3/latest/dev/ServerSideEncryptionCustomerKeys.html
base64-encoded encryption key for Amazon S3 to use to encrypt or decrypt your data.
optional base64-encoded 128-bit MD5 digest of the encryption key according to RFC 1321.
Documentation: http://docs.aws.amazon.com/AmazonS3/latest/dev/UsingKMSEncryption.html
Documentation: http://docs.aws.amazon.com/AmazonS3/latest/dev/UsingKMSEncryption.html
amazon resource name in the "arn:aws:kms:my-region:my-account-id:key/my-key-id" format.
optional base64-encoded UTF-8 string holding JSON with the encryption context key-value pairs