diff options
Diffstat (limited to 'vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/blowfish/cipher.go')
-rw-r--r-- | vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/blowfish/cipher.go | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/blowfish/cipher.go b/vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/blowfish/cipher.go deleted file mode 100644 index 2641dadd6..000000000 --- a/vendor/github.com/miekg/dns/vendor/golang.org/x/crypto/blowfish/cipher.go +++ /dev/null @@ -1,91 +0,0 @@ -// Copyright 2010 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. - -// Package blowfish implements Bruce Schneier's Blowfish encryption algorithm. -package blowfish // import "golang.org/x/crypto/blowfish" - -// The code is a port of Bruce Schneier's C implementation. -// See https://www.schneier.com/blowfish.html. - -import "strconv" - -// The Blowfish block size in bytes. -const BlockSize = 8 - -// A Cipher is an instance of Blowfish encryption using a particular key. -type Cipher struct { - p [18]uint32 - s0, s1, s2, s3 [256]uint32 -} - -type KeySizeError int - -func (k KeySizeError) Error() string { - return "crypto/blowfish: invalid key size " + strconv.Itoa(int(k)) -} - -// NewCipher creates and returns a Cipher. -// The key argument should be the Blowfish key, from 1 to 56 bytes. -func NewCipher(key []byte) (*Cipher, error) { - var result Cipher - if k := len(key); k < 1 || k > 56 { - return nil, KeySizeError(k) - } - initCipher(&result) - ExpandKey(key, &result) - return &result, nil -} - -// NewSaltedCipher creates a returns a Cipher that folds a salt into its key -// schedule. For most purposes, NewCipher, instead of NewSaltedCipher, is -// sufficient and desirable. For bcrypt compatibility, the key can be over 56 -// bytes. -func NewSaltedCipher(key, salt []byte) (*Cipher, error) { - if len(salt) == 0 { - return NewCipher(key) - } - var result Cipher - if k := len(key); k < 1 { - return nil, KeySizeError(k) - } - initCipher(&result) - expandKeyWithSalt(key, salt, &result) - return &result, nil -} - -// BlockSize returns the Blowfish block size, 8 bytes. -// It is necessary to satisfy the Block interface in the -// package "crypto/cipher". -func (c *Cipher) BlockSize() int { return BlockSize } - -// Encrypt encrypts the 8-byte buffer src using the key k -// and stores the result in dst. -// Note that for amounts of data larger than a block, -// it is not safe to just call Encrypt on successive blocks; -// instead, use an encryption mode like CBC (see crypto/cipher/cbc.go). -func (c *Cipher) Encrypt(dst, src []byte) { - l := uint32(src[0])<<24 | uint32(src[1])<<16 | uint32(src[2])<<8 | uint32(src[3]) - r := uint32(src[4])<<24 | uint32(src[5])<<16 | uint32(src[6])<<8 | uint32(src[7]) - l, r = encryptBlock(l, r, c) - dst[0], dst[1], dst[2], dst[3] = byte(l>>24), byte(l>>16), byte(l>>8), byte(l) - dst[4], dst[5], dst[6], dst[7] = byte(r>>24), byte(r>>16), byte(r>>8), byte(r) -} - -// Decrypt decrypts the 8-byte buffer src using the key k -// and stores the result in dst. -func (c *Cipher) Decrypt(dst, src []byte) { - l := uint32(src[0])<<24 | uint32(src[1])<<16 | uint32(src[2])<<8 | uint32(src[3]) - r := uint32(src[4])<<24 | uint32(src[5])<<16 | uint32(src[6])<<8 | uint32(src[7]) - l, r = decryptBlock(l, r, c) - dst[0], dst[1], dst[2], dst[3] = byte(l>>24), byte(l>>16), byte(l>>8), byte(l) - dst[4], dst[5], dst[6], dst[7] = byte(r>>24), byte(r>>16), byte(r>>8), byte(r) -} - -func initCipher(c *Cipher) { - copy(c.p[0:], p[0:]) - copy(c.s0[0:], s0[0:]) - copy(c.s1[0:], s1[0:]) - copy(c.s2[0:], s2[0:]) - copy(c.s3[0:], s3[0:]) -} |