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fix garbage in arrays when doing stress test

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This commit is contained in:
stremovsky
2021-12-16 22:09:48 +02:00
parent 8ad25a69b6
commit 178ffa653d
1 changed files with 28 additions and 11 deletions
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39
src/cryptor.go
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@@ -30,12 +30,12 @@ func generateMasterKey() ([]byte, error) {
}
func decrypt(masterKey []byte, userKey []byte, data []byte) ([]byte, error) {
// Load your secret key from a safe place and reuse it across multiple
// Seal/Open calls. (Obviously don't use this example key for anything
// real.) If you want to convert a passphrase to a key, use a suitable
// package like bcrypt or scrypt.
// When decoded the key should be 16 bytes (AES-128) or 32 (AES-256).
key := append(masterKey, userKey...)
// DO NOT USE THE FOLLOWING LINE. It is broken!!!
//key := append(masterKey, userKey...)
la := len(masterKey)
key := make([]byte, la + len(userKey))
copy(key, masterKey)
copy(key[la:], userKey)
block, err := aes.NewCipher(key)
if err != nil {
@@ -49,6 +49,8 @@ func decrypt(masterKey []byte, userKey []byte, data []byte) ([]byte, error) {
ciphertext := data[0 : len(data)-12]
nonce := data[len(data)-12:]
plaintext, err := aesgcm.Open(nil, nonce, ciphertext, nil)
//fmt.Printf("full key: %x, mkey %x, ukey: %x, data: %x\n", key, masterKey, userKey, data)
//fmt.Printf("nonce: %x, ciphertext: %x\n", nonce, ciphertext)
return plaintext, err
}
@@ -56,7 +58,11 @@ func encrypt(masterKey []byte, userKey []byte, plaintext []byte) ([]byte, error)
// We use 32 byte key (AES-256).
// comprising 24 master key
// and 8 bytes record key
key := append(masterKey, userKey...)
la := len(masterKey)
key := make([]byte, la + len(userKey))
copy(key, masterKey)
copy(key[la:], userKey)
block, err := aes.NewCipher(key)
if err != nil {
return nil, err
@@ -70,17 +76,25 @@ func encrypt(masterKey []byte, userKey []byte, plaintext []byte) ([]byte, error)
if err != nil {
return nil, err
}
ciphertext := aesgcm.Seal(nil, nonce, plaintext, nil)
ciphertext0 := aesgcm.Seal(nil, nonce, plaintext, nil)
//fmt.Printf("%x\n", ciphertext)
// apppend random nonce bvalue to the end
ciphertext = append(ciphertext, nonce...)
//ciphertext := append(ciphertext0, nonce...)
la = len(ciphertext0)
ciphertext := make([]byte, la + len(nonce))
copy(ciphertext, ciphertext0)
copy(ciphertext[la:], nonce)
return ciphertext, nil
}
func basicStringEncrypt(plaintext string, masterKey []byte, code []byte) (string, error) {
//log.Printf("Going to encrypt %s", plaintext)
nonce := []byte("$DataBunker$")
key := append(masterKey, code...)
la := len(masterKey)
key := make([]byte, la + len(code))
copy(key, masterKey)
copy(key[la:], code)
block, err := aes.NewCipher(key)
if err != nil {
log.Printf("error in aes.NewCipher %s", err)
@@ -103,7 +117,10 @@ func basicStringDecrypt(data string, masterKey []byte, code []byte) (string, err
return "", err
}
nonce := []byte("$DataBunker$")
key := append(masterKey, code...)
la := len(masterKey)
key := make([]byte, la + len(code))
copy(key, masterKey)
copy(key[la:], code)
block, err := aes.NewCipher(key)
if err != nil {
return "", err