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crypto: assert cipher algorithm is always valid

Crypto routines 'qcrypto_cipher_get_block_len' and
'qcrypto_cipher_get_key_len' return non-zero cipher block and key
lengths from static arrays 'alg_block_len[]' and 'alg_key_len[]'
respectively. Returning 'zero(0)' value from either of them would
likely lead to an error condition.

Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Prasad J Pandit 8 년 전
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32c813e6c2
1개의 변경된 파일2개의 추가작업 그리고 6개의 파일을 삭제
  1. 2 6
      crypto/cipher.c

+ 2 - 6
crypto/cipher.c

@@ -63,18 +63,14 @@ static bool mode_need_iv[QCRYPTO_CIPHER_MODE__MAX] = {
 
 size_t qcrypto_cipher_get_block_len(QCryptoCipherAlgorithm alg)
 {
-    if (alg >= G_N_ELEMENTS(alg_key_len)) {
-        return 0;
-    }
+    assert(alg < G_N_ELEMENTS(alg_key_len));
     return alg_block_len[alg];
 }
 
 
 size_t qcrypto_cipher_get_key_len(QCryptoCipherAlgorithm alg)
 {
-    if (alg >= G_N_ELEMENTS(alg_key_len)) {
-        return 0;
-    }
+    assert(alg < G_N_ELEMENTS(alg_key_len));
     return alg_key_len[alg];
 }