kunt

golang IRC bot
git clone git://git.2f30.org/kunt.git
Log | Files | Refs | LICENSE

commit 70420c9c73cdd9b9439fb353686b6e5b932f094d
parent 90c6a197e5b4c24bd9a4ee0510e0f317b412a0a9
Author: sin <sin@2f30.org>
Date:   Tue Apr 30 15:13:42 +0100

add bdec and benc

Diffstat:
build | 2++
src/bdec/bdec.go | 48++++++++++++++++++++++++++++++++++++++++++++++++
src/benc/benc.go | 60++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
src/mapfs/mapfs.go | 1-
4 files changed, 110 insertions(+), 1 deletion(-)
diff --git a/build b/build @@ -4,3 +4,5 @@ export GOPATH=$PWD go get "code.google.com/p/go.crypto/blowfish" go get "code.google.com/p/go9p/p" go build -o src/kunt/kunt -v kunt +go build -o src/bdec/bdec -v bdec +go build -o src/benc/benc -v benc diff --git a/src/bdec/bdec.go b/src/bdec/bdec.go @@ -0,0 +1,48 @@ +package main + +import ( + "code.google.com/p/go.crypto/blowfish" + "flag" + "fmt" + "io/ioutil" + "log" + "os" +) + +func usage() { + fmt.Fprintf(os.Stderr, "usage: %s <pass> <encrypted-file>\n", + os.Args[0]) + os.Exit(2) +} + +func decryptBuf(c *blowfish.Cipher, a []byte) []byte { + pt := make([]byte, len(a)) + for i := 0; i < len(a); i += blowfish.BlockSize { + c.Decrypt(pt[i:i+blowfish.BlockSize], + a[i:i+blowfish.BlockSize]) + } + return pt +} + +func main() { + log.SetPrefix("bdec: ") + flag.Usage = usage + flag.Parse() + + args := flag.Args() + if len(args) < 2 { + usage() + } + + c, err := blowfish.NewCipher([]byte(args[0])) + if err != nil { + log.Fatal(err) + } + + b, err := ioutil.ReadFile(args[1]) + if err != nil { + log.Fatal(err) + } + + fmt.Fprintf(os.Stdout, "%s", decryptBuf(c, b)) +} diff --git a/src/benc/benc.go b/src/benc/benc.go @@ -0,0 +1,60 @@ +package main + +import ( + "code.google.com/p/go.crypto/blowfish" + "flag" + "fmt" + "io/ioutil" + "log" + "os" +) + +func usage() { + fmt.Fprintf(os.Stderr, "usage: %s <pass> <file>\n", + os.Args[0]) + os.Exit(2) +} + +func encryptBuf(c *blowfish.Cipher, a []byte) []byte { + padded := a + diff := len(a) % blowfish.BlockSize + if diff != 0 { + diff = blowfish.BlockSize - diff + } + for i := 0; i < diff; i++ { + padded = append(padded, byte(0x0)) + } + ct := make([]byte, len(padded)) + for i := 0; i < len(a); i += blowfish.BlockSize { + if i+blowfish.BlockSize > len(a) { + c.Encrypt(ct[i:], padded[i:]) + return ct + } + c.Encrypt(ct[i:i+blowfish.BlockSize], + padded[i:i+blowfish.BlockSize]) + } + return ct +} + +func main() { + log.SetPrefix("benc: ") + flag.Usage = usage + flag.Parse() + + args := flag.Args() + if len(args) < 2 { + usage() + } + + c, err := blowfish.NewCipher([]byte(args[0])) + if err != nil { + log.Fatal(err) + } + + b, err := ioutil.ReadFile(args[1]) + if err != nil { + log.Fatal(err) + } + + fmt.Fprintf(os.Stdout, "%s", encryptBuf(c, b)) +} diff --git a/src/mapfs/mapfs.go b/src/mapfs/mapfs.go @@ -82,7 +82,6 @@ func NewEncryptedMapfs(name string, path string, prefix string, key string) *Map encrypt: true, cipher: c, } - } // Sync dirty entries to disk