From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001
From: upstream source tree <ports@midipix.org>
Date: Sun, 15 Mar 2015 20:14:05 -0400
Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified
 gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream
 tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.
---
 libgo/go/crypto/block/cipher.go | 57 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 libgo/go/crypto/block/cipher.go

(limited to 'libgo/go/crypto/block/cipher.go')

diff --git a/libgo/go/crypto/block/cipher.go b/libgo/go/crypto/block/cipher.go
new file mode 100644
index 000000000..e1099e9a1
--- /dev/null
+++ b/libgo/go/crypto/block/cipher.go
@@ -0,0 +1,57 @@
+// Copyright 2009 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.
+
+// The block package is deprecated, use cipher instead.
+// The block package implements standard block cipher modes
+// that can be wrapped around low-level block cipher implementations.
+// See http://csrc.nist.gov/groups/ST/toolkit/BCM/current_modes.html
+// and NIST Special Publication 800-38A.
+package block
+
+// A Cipher represents an implementation of block cipher
+// using a given key.  It provides the capability to encrypt
+// or decrypt individual blocks.  The mode implementations
+// extend that capability to streams of blocks.
+type Cipher interface {
+	// BlockSize returns the cipher's block size.
+	BlockSize() int
+
+	// Encrypt encrypts the first block in src into dst.
+	// Src and dst may point at the same memory.
+	Encrypt(dst, src []byte)
+
+	// Decrypt decrypts the first block in src into dst.
+	// Src and dst may point at the same memory.
+	Decrypt(dst, src []byte)
+}
+
+// Utility routines
+
+func shift1(dst, src []byte) byte {
+	var b byte
+	for i := len(src) - 1; i >= 0; i-- {
+		bb := src[i] >> 7
+		dst[i] = src[i]<<1 | b
+		b = bb
+	}
+	return b
+}
+
+func same(p, q []byte) bool {
+	if len(p) != len(q) {
+		return false
+	}
+	for i := 0; i < len(p); i++ {
+		if p[i] != q[i] {
+			return false
+		}
+	}
+	return true
+}
+
+func dup(p []byte) []byte {
+	q := make([]byte, len(p))
+	copy(q, p)
+	return q
+}
-- 
cgit v1.2.3