147 lines
2.7 KiB
Go
147 lines
2.7 KiB
Go
package main
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import (
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"errors"
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"flag"
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"io"
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"log"
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"os"
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"path"
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"git.trj.tw/root/go-pgp-tool/pgpcrypt"
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"golang.org/x/crypto/openpgp"
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"git.trj.tw/root/go-pgp-tool/libs"
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"git.trj.tw/root/go-pgp-tool/tools"
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)
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var (
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flags *libs.Flags
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)
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func init() {
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flags = new(libs.Flags)
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libs.RegFlag(flags)
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flag.Parse()
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}
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// args [0] is this
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func main() {
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// check flags value
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if !flags.Encrypt && !flags.Decrypt {
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showUsage()
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return
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}
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if flags.Decrypt && flags.Encrypt {
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showUsage()
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return
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}
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if len(flags.KeyFile) == 0 {
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log.Fatal("please input KeyFile path")
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}
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if len(flags.SrcFile) == 0 {
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log.Fatal("please input SrcFile path")
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}
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if len(flags.DstFile) == 0 {
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log.Fatal("please input DstFile path")
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}
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// check file exists
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if !tools.CheckExists(flags.KeyFile, false) {
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log.Fatal("KeyFile not exists")
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}
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if !tools.CheckExists(flags.SrcFile, false) {
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log.Fatal("SrcFile not exists")
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}
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dir := path.Dir(flags.DstFile)
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if !tools.CheckExists(dir, true) {
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log.Fatal("DstFile parent directory not exists")
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}
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if !flags.Override && tools.CheckExists(flags.DstFile, false) {
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log.Fatal("DstFile has Exists if override add flag -y ")
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}
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flags.KeyFile = tools.ParsePath(flags.KeyFile)
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flags.SrcFile = tools.ParsePath(flags.SrcFile)
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flags.DstFile = tools.ParsePath(flags.DstFile)
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if flags.Encrypt {
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// encryptAction()
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encrypt()
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}
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if flags.Decrypt {
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decrypt()
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}
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}
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func handleError(err error) {
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if err != nil {
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log.Fatal(err)
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}
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}
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func showUsage() {
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flag.Usage()
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}
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func decrypt() {
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keyFile, err := os.Open(flags.KeyFile)
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handleError(err)
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defer keyFile.Close()
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keyList, err := pgpcrypt.ReadKeyFile(keyFile)
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handleError(err)
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if len(keyList) == 0 {
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handleError(errors.New("key not found"))
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}
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key := keyList[0]
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passphraseByte := []byte(flags.Password)
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key.PrivateKey.Decrypt(passphraseByte)
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for _, sub := range key.Subkeys {
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sub.PrivateKey.Decrypt(passphraseByte)
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}
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dstFile, err := os.Create(flags.DstFile)
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handleError(err)
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defer dstFile.Close()
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srcFile, err := os.Open(flags.SrcFile)
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handleError(err)
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defer srcFile.Close()
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md, err := openpgp.ReadMessage(srcFile, keyList, nil, nil)
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_, err = io.Copy(dstFile, md.UnverifiedBody)
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handleError(err)
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}
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func encrypt() {
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keyFile, err := os.Open(flags.KeyFile)
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handleError(err)
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defer keyFile.Close()
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keyList, err := pgpcrypt.ReadKeyFile(keyFile)
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handleError(err)
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distFile, err := os.Create(flags.DstFile)
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handleError(err)
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defer distFile.Close()
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srcFile, err := os.Open(flags.SrcFile)
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handleError(err)
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defer srcFile.Close()
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fhint := &openpgp.FileHints{}
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fhint.IsBinary = true
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tmpWriter, err := openpgp.Encrypt(distFile, keyList, nil, fhint, nil)
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handleError(err)
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defer tmpWriter.Close()
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_, err = io.Copy(tmpWriter, srcFile)
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handleError(err)
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}
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