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
encoding/binaryPackage binary implements simple translation between numbers and byte sequences and encoding and decoding of varints.
strconvPackage strconv implements conversions to and from string representations of basic data types.
syncPackage sync provides basic synchronization primitives such as mutual exclusion locks.