kunt

commit 70420c9c73cdd9b9439fb353686b6e5b932f094d
parent 90c6a197e5b4c24bd9a4ee0510e0f317b412a0a9
Author: sin <sin@2f30.org>
Date:   Tue, 30 Apr 2013 15:13:42 +0100

add bdec and benc

Diffstat:
M
build
 | 
2
++
A
src/bdec/bdec.go
 | 
48
++++++++++++++++++++++++++++++++++++++++++++++++
A
src/benc/benc.go
 | 
60
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
M
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