first commit

.gitignore

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+# Created by .ignore support plugin (hsz.mobi)
+### Go template
+# Binaries for programs and plugins
+*.exe
+*.dll
+*.so
+*.dylib
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736
+.glide/
+### JetBrains template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff:
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/dictionaries
+
+# Sensitive or high-churn files:
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.xml
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+
+# Gradle:
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Mongo Explorer plugin:
+.idea/**/mongoSettings.xml
+
+## File-based project format:
+*.iws
+
+## Plugin-specific files:
+
+# IntelliJ
+/out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+

file_cipher.go

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+package file_cipher_go
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"os"
+	"io"
+)
+
+var KEY = []byte("qwerqwerqwerqwer")
+
+
+func Encrypt(filePath, destName string) string {
+
+	inFile, err := os.Open(filePath)
+	if err != nil {
+		panic(err)
+	}
+	defer inFile.Close()
+
+	block, err := aes.NewCipher(KEY)
+	if err != nil {
+		panic(err)
+	}
+
+	var iv [aes.BlockSize]byte
+	stream := cipher.NewOFB(block, iv[:])
+
+	outFile, err := os.OpenFile(destName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
+	if err != nil {
+		panic(err)
+	}
+	defer outFile.Close()
+
+
+	writer := &cipher.StreamWriter{S: stream, W: outFile}
+	if _, err := io.Copy(writer, inFile); err != nil {
+		panic(err)
+	}
+
+	return outFile.Name()
+}
+
+func Decrypt(filePath, destName string) string {
+	inFile, err := os.Open(filePath)
+	if err != nil {
+		panic(err)
+	}
+	defer inFile.Close()
+
+	block, err := aes.NewCipher(KEY)
+	if err != nil {
+		panic(err)
+	}
+
+	var iv [aes.BlockSize]byte
+	stream := cipher.NewOFB(block, iv[:])
+
+	outFile, err := os.OpenFile(destName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
+	if err != nil {
+		panic(err)
+	}
+	defer outFile.Close()
+
+	reader := &cipher.StreamReader{S: stream, R: inFile}
+	if _, err := io.Copy(outFile, reader); err != nil {
+		panic(err)
+	}
+
+	return outFile.Name()
+}

file_cipher_test.go

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+package file_cipher_go
+
+import "testing"
+
+func TestEncrypt(t *testing.T) {
+	Encrypt("/home/insanity/addressbook.proto", "/home/insanity/addressbook.enc")
+}
+
+func TestDecrypt(t *testing.T) {
+	Decrypt("/home/insanity/addressbook.enc", "/home/insanity/addressbook.dec")
+}