You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
30 lines
817 B
30 lines
817 B
package encryption |
|
|
|
import ( |
|
"crypto/aes" |
|
"crypto/cipher" |
|
"fmt" |
|
) |
|
|
|
// Decrypts encrypted aes data with given key. |
|
// https://www.melvinvivas.com/how-to-encrypt-and-decrypt-data-using-aes/ - very grateful to the author, THANK YOU. |
|
func Decrypt(key, dataToDecrypt []byte) ([]byte, error) { |
|
block, err := aes.NewCipher(key) |
|
if err != nil { |
|
return nil, fmt.Errorf("could not create new AES cipher: %s", err) |
|
} |
|
|
|
aesGCM, err := cipher.NewGCM(block) |
|
if err != nil { |
|
return nil, fmt.Errorf("could not create new GCM: %s", err) |
|
} |
|
|
|
nonce, encryptedBytes := dataToDecrypt[:aesGCM.NonceSize()], dataToDecrypt[aesGCM.NonceSize():] |
|
|
|
decryptedData, err := aesGCM.Open(nil, nonce, encryptedBytes, nil) |
|
if err != nil { |
|
return nil, fmt.Errorf("could not decrypt given data: %s", err) |
|
} |
|
|
|
return decryptedData, nil |
|
}
|
|
|