LEFT | RIGHT |
(no file at all) | |
| 1 // Copyright 2012 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 // +build amd64 |
| 6 |
| 7 package aes |
| 8 |
| 9 // defined in asm_$GOARCH.s |
| 10 func hasAsm() bool |
| 11 func encryptBlockAsm(nr int, xk *uint32, dst, src *byte) |
| 12 func decryptBlockAsm(nr int, xk *uint32, dst, src *byte) |
| 13 func expandKeyAsm(nr int, key *byte, enc *uint32, dec *uint32) |
| 14 |
| 15 var useAsm = hasAsm() |
| 16 |
| 17 func encryptBlock(xk []uint32, dst, src []byte) { |
| 18 if useAsm { |
| 19 encryptBlockAsm(len(xk)/4-1, &xk[0], &dst[0], &src[0]) |
| 20 } else { |
| 21 encryptBlockGo(xk, dst, src) |
| 22 } |
| 23 } |
| 24 func decryptBlock(xk []uint32, dst, src []byte) { |
| 25 if useAsm { |
| 26 decryptBlockAsm(len(xk)/4-1, &xk[0], &dst[0], &src[0]) |
| 27 } else { |
| 28 decryptBlockGo(xk, dst, src) |
| 29 } |
| 30 } |
| 31 func expandKey(key []byte, enc, dec []uint32) { |
| 32 if useAsm { |
| 33 rounds := 10 |
| 34 switch len(key) { |
| 35 case 128 / 8: |
| 36 rounds = 10 |
| 37 case 192 / 8: |
| 38 rounds = 12 |
| 39 case 256 / 8: |
| 40 rounds = 14 |
| 41 } |
| 42 expandKeyAsm(rounds, &key[0], &enc[0], &dec[0]) |
| 43 } else { |
| 44 expandKeyGo(key, enc, dec) |
| 45 } |
| 46 } |
LEFT | RIGHT |