| // Copyright 2016 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| //go:build !purego |
| |
| package aes |
| |
| // cryptBlocksChain invokes the cipher message with chaining (KMC) instruction |
| // with the given function code. The length must be a multiple of BlockSize (16). |
| // |
| //go:noescape |
| func cryptBlocksChain(c code, iv, key, dst, src *byte, length int) |
| |
| func cryptBlocksEnc(b *Block, civ *[BlockSize]byte, dst, src []byte) { |
| if b.fallback != nil { |
| cryptBlocksEncGeneric(b, civ, dst, src) |
| return |
| } |
| cryptBlocksChain(b.function, &civ[0], &b.key[0], &dst[0], &src[0], len(src)) |
| } |
| |
| func cryptBlocksDec(b *Block, civ *[BlockSize]byte, dst, src []byte) { |
| if b.fallback != nil { |
| cryptBlocksDecGeneric(b, civ, dst, src) |
| return |
| } |
| // Decrypt function code is encrypt + 128. |
| cryptBlocksChain(b.function+128, &civ[0], &b.key[0], &dst[0], &src[0], len(src)) |
| } |
