commit f844836ddccf3dbcba142128da5dd8ee618f3e91
author Gonglei <arei.gonglei@huawei.com> Mon Sep 26 17:23:21 2016 +0800
committer Daniel P. Berrange <berrange@redhat.com> Wed Oct 19 10:09:24 2016 +0100
tree 91556d3ea8b8236cf10d16681dacf2d95dfb4232
parent e8ddc2eae5ccc41f0815e5c43e70cb04a7e67e2e

crypto: extend mode as a parameter in qcrypto_cipher_supports()

It can't guarantee all cipher modes are supported
if one cipher algorithm is supported by a backend.
Let's extend qcrypto_cipher_supports() to take both
the algorithm and mode as parameters.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

crypto/cipher-gcrypt.c

diff --git a/crypto/cipher-gcrypt.c b/crypto/cipher-gcrypt.c
index da3f4c7..05026c0 100644
--- a/crypto/cipher-gcrypt.c
+++ b/crypto/cipher-gcrypt.c
@@ -24,7 +24,8 @@
 #include <gcrypt.h>
 
 
-bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg)
+bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg,
+                             QCryptoCipherMode mode)
 {
     switch (alg) {
     case QCRYPTO_CIPHER_ALG_DES_RFB:
@@ -37,6 +38,16 @@
     case QCRYPTO_CIPHER_ALG_SERPENT_256:
     case QCRYPTO_CIPHER_ALG_TWOFISH_128:
     case QCRYPTO_CIPHER_ALG_TWOFISH_256:
+        break;
+    default:
+        return false;
+    }
+
+    switch (mode) {
+    case QCRYPTO_CIPHER_MODE_ECB:
+    case QCRYPTO_CIPHER_MODE_CBC:
+    case QCRYPTO_CIPHER_MODE_XTS:
+    case QCRYPTO_CIPHER_MODE_CTR:
         return true;
     default:
         return false;