AesCtr

README

AesCtr

• use the festest golang aes ctr implement with golang 1.9

performance on my computer (mac)

• go1.9.2 aes ctr (BenchmarkAESCTR1K_goAesCtr)

1000000	      2336 ns/op	 436.15 MB/s

• CL 51670 (BenchmarkAESCTR1K_thisAesCtr)

3000000	       467 ns/op	2178.83 MB/s

LICENSE

Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

how i get this package

• folk code from golang CL 51670 (https://go-review.googlesource.com/c/go/+/51670) (https://github.com/golang/go/issues/20967)
• change package name to AesCtr
• copy internal package from golang1.9.2
• add ctr test to this package. (aes_ctr_test.go)

Documentation

Overview

Package aes implements AES encryption (formerly Rijndael), as defined in U.S. Federal Information Processing Standards Publication 197.

The AES operations in this package are not implemented using constant-time algorithms. An exception is when running on systems with enabled hardware support for AES that makes these operations constant-time. Examples include amd64 systems using AES-NI extensions and s390x systems using Message-Security-Assist extensions. On such systems, when the result of NewCipher is passed to cipher.NewGCM, the GHASH operation used by GCM is also constant-time.

Index

• Constants
• func NewCipher(key []byte) (cipher.Block, error)
• type KeySizeError
  • func (k KeySizeError) Error() string

Constants

const BlockSize = 16

The AES block size in bytes.

Functions

func NewCipher

func NewCipher(key []byte) (cipher.Block, error)

NewCipher creates and returns a new cipher.Block. The key argument should be the AES key, either 16, 24, or 32 bytes to select AES-128, AES-192, or AES-256.

Types

type KeySizeError

type KeySizeError int

func (KeySizeError) Error

func (k KeySizeError) Error() string