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aes.go
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/
aes.go
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package crypto
import (
"crypto/aes"
"crypto/cipher"
"crypto/rand"
)
func AESGCMEncrypt(data []byte, key []byte) ([]byte, error) {
nonce := make([]byte, 12)
if _, err := rand.Read(nonce); err != nil {
return nil, err
}
block, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
aead, err := cipher.NewGCM(block)
if err != nil {
return nil, err
}
ciphertext := aead.Seal(nil, nonce, data, nil)
return append(nonce, ciphertext...), nil
}
func AESGCMDecrypt(data []byte, key []byte) ([]byte, error) {
nonce := data[:12]
ciphertext := data[12:]
block, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
aead, err := cipher.NewGCM(block)
if err != nil {
return nil, err
}
plaintext, err := aead.Open(nil, nonce, ciphertext, nil)
if err != nil {
return nil, err
}
return plaintext, nil
}