Imports of package des

PathSynopsis
crypto/cipherPackage cipher implements standard block cipher modes that can be wrapped around low-level block cipher implementations.
crypto/internal/alias
internal/byteorderPackage byteorder provides functions for decoding and encoding little and big endian integer types from/to byte slices.
strconvPackage strconv implements conversions to and from string representations of basic data types.
syncPackage sync provides basic synchronization primitives such as mutual exclusion locks.