1 files changed, 0 insertions, 44 deletions
diff --git a/src/pkg/crypto/cipher/ofb.go b/src/pkg/crypto/cipher/ofb.go
deleted file mode 100644
index 85e5f02b0..000000000
--- a/src/pkg/crypto/cipher/ofb.go
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2011 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.
-
-// OFB (Output Feedback) Mode.
-
-package cipher
-
-type ofb struct {
-	b       Block
-	out     []byte
-	outUsed int
-}
-
-// NewOFB returns a Stream that encrypts or decrypts using the block cipher b
-// in output feedback mode. The initialization vector iv's length must be equal
-// to b's block size.
-func NewOFB(b Block, iv []byte) Stream {
-	blockSize := b.BlockSize()
-	if len(iv) != blockSize {
-		return nil
-	}
-
-	x := &ofb{
-		b:       b,
-		out:     make([]byte, blockSize),
-		outUsed: 0,
-	}
-	b.Encrypt(x.out, iv)
-
-	return x
-}
-
-func (x *ofb) XORKeyStream(dst, src []byte) {
-	for i, s := range src {
-		if x.outUsed == len(x.out) {
-			x.b.Encrypt(x.out, x.out)
-			x.outUsed = 0
-		}
-
-		dst[i] = s ^ x.out[x.outUsed]
-		x.outUsed++
-	}
-}