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encrypto.go
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/
encrypto.go
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package gpgutils
import (
"fmt"
"io"
"os"
"github.com/ProtonMail/gopenpgp/v2/helper"
)
var encryptedFile *os.File
func EncryptMessageArmored(key, fileIn, fileOut string) error {
if _, err := os.Stat(key); os.IsNotExist(err) {
return fmt.Errorf("chave pública não encontrada")
}
keyFile, err := os.Open(key)
if err != nil {
fmt.Printf("failed reading file: %s", err)
return err
}
defer keyFile.Close()
keyBytesContent, err := io.ReadAll(keyFile)
if err != nil {
return err
}
keyStringContent := string(keyBytesContent)
fileToEncrypt, err := os.Open(fileIn)
if err != nil {
fmt.Printf("failed reading file: %s", err)
return err
}
defer fileToEncrypt.Close()
fileBytesContent, err := io.ReadAll(fileToEncrypt)
if err != nil {
return err
}
// fileStringContent := string(fileBytesContent)
// armor, err := helper.EncryptMessageArmored(keyStringContent, fileStringContent)
// if err != nil {
// return err
// }
armor, err := helper.EncryptBinaryMessageArmored(keyStringContent, fileBytesContent)
if err != nil {
return err
}
if fileOut == "" {
encryptedFile, err = os.Create(fileIn + ".gpg")
if err != nil {
return err
}
} else {
encryptedFile, err = os.Create(fileOut)
if err != nil {
return err
}
}
defer encryptedFile.Close()
_, err = encryptedFile.Write([]byte(armor))
if err != nil {
return err
}
fmt.Println("Arquivo criptografado com sucesso!")
return nil
}
func EncryptSignMessageArmored(pubkey, privkey, passphrase, fileIn, fileOut string) error {
if _, err := os.Stat(pubkey); os.IsNotExist(err) {
return fmt.Errorf("chave pública não encontrada")
}
if _, err := os.Stat(privkey); os.IsNotExist(err) {
return fmt.Errorf("chave privada não encontrada")
}
pubKeyFile, err := os.Open(pubkey)
if err != nil {
fmt.Printf("failed reading file: %s", err)
return err
}
defer pubKeyFile.Close()
pubKeyBytesContent, err := io.ReadAll(pubKeyFile)
if err != nil {
return err
}
pubKeyStringContent := string(pubKeyBytesContent)
privKeyFile, err := os.Open(privkey)
if err != nil {
fmt.Printf("failed reading file: %s", err)
return err
}
defer privKeyFile.Close()
keyBytesContent, err := io.ReadAll(privKeyFile)
if err != nil {
return err
}
privKeyStringContent := string(keyBytesContent)
fileToEncrypt, err := os.Open(fileIn)
if err != nil {
fmt.Printf("failed reading file: %s", err)
return err
}
defer fileToEncrypt.Close()
fileBytesContent, err := io.ReadAll(fileToEncrypt)
if err != nil {
return err
}
fileStringContent := string(fileBytesContent)
armor, err := helper.EncryptSignMessageArmored(pubKeyStringContent, privKeyStringContent, []byte(passphrase), fileStringContent)
if err != nil {
return err
}
if fileOut == "" {
encryptedFile, err = os.Create(fileIn + ".gpg")
if err != nil {
return err
}
} else {
encryptedFile, err = os.Create(fileOut + ".gpg")
if err != nil {
return err
}
}
defer encryptedFile.Close()
_, err = encryptedFile.Write([]byte(armor))
if err != nil {
return err
}
fmt.Println("Arquivo criptografado com sucesso!")
return nil
}