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>

1 files changed, 13 insertions, 1 deletions

diff --git a/crypto/cipher-builtin.c b/crypto/cipher-builtin.c
index 9d258428b0..fd59a9e461 100644
--- a/crypto/cipher-builtin.c
+++ b/crypto/cipher-builtin.c
@@ -400,14 +400,26 @@ static int qcrypto_cipher_init_des_rfb(QCryptoCipher *cipher,
 }
 
 
-bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg)
+bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg,
+                             QCryptoCipherMode mode)
 {
     switch (alg) {
     case QCRYPTO_CIPHER_ALG_DES_RFB:
     case QCRYPTO_CIPHER_ALG_AES_128:
     case QCRYPTO_CIPHER_ALG_AES_192:
     case QCRYPTO_CIPHER_ALG_AES_256:
+        break;
+    default:
+        return false;
+    }
+
+    switch (mode) {
+    case QCRYPTO_CIPHER_MODE_ECB:
+    case QCRYPTO_CIPHER_MODE_CBC:
+    case QCRYPTO_CIPHER_MODE_XTS:
         return true;
+    case QCRYPTO_CIPHER_MODE_CTR:
+        return false;
     default:
         return false;
     }