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encrypt.go
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encrypt.go
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package util
import (
"crypto/aes"
"crypto/cipher"
"crypto/rand"
"encoding/base64"
"io"
)
func EncryptDataBase64(key, data []byte) (string, error) {
b, err := EncryptData(key, data)
if err != nil {
return "", err
}
return base64.StdEncoding.EncodeToString(b), nil
}
func DecryptDataBase64(key []byte, data string) (string, error) {
b, err := base64.StdEncoding.DecodeString(data)
if err != nil {
return "", err
}
d, err := DecryptData(key, b)
if err != nil {
return "", err
}
return string(d), nil
}
func EncryptData(key, data []byte) ([]byte, error) {
block, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
gcm, err := cipher.NewGCM(block)
if err != nil {
return nil, err
}
nonce := make([]byte, gcm.NonceSize())
_, err = io.ReadFull(rand.Reader, nonce)
if err != nil {
return nil, err
}
return gcm.Seal(nonce, nonce, data, nil), nil
}
func DecryptData(key, data []byte) ([]byte, error) {
block, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
gcm, err := cipher.NewGCM(block)
if err != nil {
return nil, err
}
nonce := data[:gcm.NonceSize()]
data = data[gcm.NonceSize():]
return gcm.Open(nil, nonce, data, nil)
}