Source file src/crypto/internal/fips140/aes/cbc_s390x.go

     1  // Copyright 2016 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 !purego
     6  
     7  package aes
     8  
     9  // cryptBlocksChain invokes the cipher message with chaining (KMC) instruction
    10  // with the given function code. The length must be a multiple of BlockSize (16).
    11  //
    12  //go:noescape
    13  func cryptBlocksChain(c code, iv, key, dst, src *byte, length int)
    14  
    15  func cryptBlocksEnc(b *Block, civ *[BlockSize]byte, dst, src []byte) {
    16  	if b.fallback != nil {
    17  		cryptBlocksEncGeneric(b, civ, dst, src)
    18  		return
    19  	}
    20  	cryptBlocksChain(b.function, &civ[0], &b.key[0], &dst[0], &src[0], len(src))
    21  }
    22  
    23  func cryptBlocksDec(b *Block, civ *[BlockSize]byte, dst, src []byte) {
    24  	if b.fallback != nil {
    25  		cryptBlocksDecGeneric(b, civ, dst, src)
    26  		return
    27  	}
    28  	// Decrypt function code is encrypt + 128.
    29  	cryptBlocksChain(b.function+128, &civ[0], &b.key[0], &dst[0], &src[0], len(src))
    30  }
    31  

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