lib/std/crypto.zig         |  16 ++
 lib/std/crypto/aes.zig     |  25 --
 lib/std/crypto/aes_siv.zig | 481 ++++++++++++++++++++++++++++++++
 lib/std/crypto/modes.zig   | 204 +++++++++++++-
 4 files changed, 689 insertions(+), 37 deletions(-)