package aes

import "crypto/internal/fips140/aes"

Index

Constants

const BlockSize = 16

BlockSize is the AES block size in bytes.

Functions

func EncryptBlockInternal

func EncryptBlockInternal(c *Block, dst, src []byte)

EncryptBlockInternal applies the AES encryption function to one block.

It is an internal function meant only for the gcm package.

func EncryptionKeySchedule

func EncryptionKeySchedule(c *Block) []uint32

EncryptionKeySchedule is used from the GCM implementation to access the precomputed AES key schedule, to pass to the assembly implementation.

func RoundToBlock

func RoundToBlock(c *CTR)

RoundToBlock is used by CTR_DRBG, which discards the rightmost unused bits at each request. It rounds the offset up to the next block boundary.

Types

type Block

type Block struct {
	// contains filtered or unexported fields
}

A Block is an instance of AES using a particular key. It is safe for concurrent use.

func New
func New(key []byte) (*Block, error)

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

func (*Block) BlockSize
func (c *Block) BlockSize() int
func (*Block) Decrypt
func (c *Block) Decrypt(dst, src []byte)
func (*Block) Encrypt
func (c *Block) Encrypt(dst, src []byte)

type CBCDecrypter

type CBCDecrypter struct {
	// contains filtered or unexported fields
}
func NewCBCDecrypter
func NewCBCDecrypter(b *Block, iv [BlockSize]byte) *CBCDecrypter

NewCBCDecrypter returns a [cipher.BlockMode] which decrypts in cipher block chaining mode, using the given Block.

func (*CBCDecrypter) BlockSize
func (c *CBCDecrypter) BlockSize() int
func (*CBCDecrypter) CryptBlocks
func (c *CBCDecrypter) CryptBlocks(dst, src []byte)
func (*CBCDecrypter) SetIV
func (x *CBCDecrypter) SetIV(iv []byte)

type CBCEncrypter

type CBCEncrypter struct {
	// contains filtered or unexported fields
}
func NewCBCEncrypter
func NewCBCEncrypter(b *Block, iv [BlockSize]byte) *CBCEncrypter

NewCBCEncrypter returns a [cipher.BlockMode] which encrypts in cipher block chaining mode, using the given Block.

func (*CBCEncrypter) BlockSize
func (c *CBCEncrypter) BlockSize() int
func (*CBCEncrypter) CryptBlocks
func (c *CBCEncrypter) CryptBlocks(dst, src []byte)
func (*CBCEncrypter) SetIV
func (x *CBCEncrypter) SetIV(iv []byte)

type CTR

type CTR struct {
	// contains filtered or unexported fields
}
func NewCTR
func NewCTR(b *Block, iv []byte) *CTR
func (*CTR) XORKeyStream
func (c *CTR) XORKeyStream(dst, src []byte)
func (*CTR) XORKeyStreamAt
func (c *CTR) XORKeyStreamAt(dst, src []byte, offset uint64)

XORKeyStreamAt behaves like XORKeyStream but keeps no state, and instead seeks into the keystream by the given bytes offset from the start (ignoring any XORKetStream calls). This allows for random access into the keystream, up to 16 EiB from the start.

type KeySizeError

type KeySizeError int
func (KeySizeError) Error
func (k KeySizeError) Error() string

Directories

gcm