cbc_ppc64x.go

     1  // Copyright 2021 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build (ppc64 || ppc64le) && !purego
     6  
     7  package aes
     8  
     9  // cryptBlocksChain invokes the cipher message identifying encrypt or decrypt.
    10  //
    11  //go:noescape
    12  func cryptBlocksChain(src, dst *byte, length int, key *uint32, iv *byte, enc int, nr int)
    13  
    14  const cbcEncrypt = 1
    15  const cbcDecrypt = 0
    16  
    17  func cryptBlocksEnc(b *Block, civ *[BlockSize]byte, dst, src []byte) {
    18  	if !supportsAES {
    19  		cryptBlocksEncGeneric(b, civ, dst, src)
    20  	} else {
    21  		cryptBlocksChain(&src[0], &dst[0], len(src), &b.enc[0], &civ[0], cbcEncrypt, b.rounds)
    22  	}
    23  }
    24  
    25  func cryptBlocksDec(b *Block, civ *[BlockSize]byte, dst, src []byte) {
    26  	if !supportsAES {
    27  		cryptBlocksDecGeneric(b, civ, dst, src)
    28  	} else {
    29  		cryptBlocksChain(&src[0], &dst[0], len(src), &b.dec[0], &civ[0], cbcDecrypt, b.rounds)
    30  	}
    31  }
    32
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