Crypto: Mostly cosmetic changes

crypto/Kconfig

@@ -46,4 +46,8 @@ config CRYPTO_SW_AES
 		Enable the software AES library as described in
 		include/nuttx/crypto/aes.h
 
+		TODO: Adapt interfaces so that they are consistent with H/W AES
+		implemenations.  This needs to support up_aesinitialize() and
+		aes_cypher() per include/nuttx/crypto/crypto.h.
+
 endif # CRYPTO

crypto/aes.c

@@ -34,6 +34,11 @@
  *
  ****************************************************************************/
 
+/* TODO: Adapt interfaces so that they are consistent with H/W AES
+ * implemenations.  This needs to support up_aesinitialize() and
+ * aes_cypher() per include/nuttx/crypto/crypto.h.
+ */
+
 /****************************************************************************
  * Included Files
  ****************************************************************************/
@@ -582,7 +587,8 @@ void aes_encrypt(FAR uint8_t *state, FAR const uint8_t *key)
 
 void aes_decrypt(FAR uint8_t *state, FAR const uint8_t *key)
 {
-  expand_key(g_expanded_key, key);       /* Expand the key into 176 bytes */
+  /* Expand the key into 176 bytes */
+
+  expand_key(g_expanded_key, key);
   aes_decr(state, g_expanded_key);
 }
-

crypto/cryptodev.c

@@ -50,6 +50,16 @@
 #include <nuttx/crypto/crypto.h>
 #include <nuttx/crypto/cryptodev.h>
 
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifdef CONFIG_CRYPTO_AES
+#  define AES_CYPHER(mode) \
+  aes_cypher(op->dst, op->src, op->len, op->iv, ses->key, ses->keylen, \
+             mode, encrypt)
+#endif
+
 /****************************************************************************
  * Private Function Prototypes
  ****************************************************************************/
@@ -74,8 +84,13 @@ static const struct file_operations g_cryptodevops =
   cryptodev_read,     /* read   */
   cryptodev_write,    /* write  */
   0,                  /* seek   */
-  cryptodev_ioctl,    /* ioctl */
+  cryptodev_ioctl     /* ioctl  */
-  0,                  /* poll */
+#ifndef CONFIG_DISABLE_POLL
+  , 0                 /* poll   */
+#endif
+#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
+  , 0                 /* unlink */
+#endif
 };
 
 /****************************************************************************
@@ -110,6 +125,7 @@ static int cryptodev_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
       return OK;
     }
 
+#ifdef CONFIG_CRYPTO_AES
   case CIOCCRYPT:
     {
       FAR struct crypt_op *op    = (FAR struct crypt_op *)arg;
@@ -132,10 +148,6 @@ static int cryptodev_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
       switch (ses->cipher)
         {
-
-#if defined(CONFIG_CRYPTO_AES)
-#  define AES_CYPHER(mode) aes_cypher(op->dst, op->src, op->len, op->iv, ses->key, ses->keylen, mode, encrypt)
-
         case CRYPTO_AES_ECB:
           return AES_CYPHER(AES_MODE_ECB);
 
@@ -145,16 +157,14 @@ static int cryptodev_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
         case CRYPTO_AES_CTR:
           return AES_CYPHER(AES_MODE_CTR);
 
-#  undef AES_CYPHER
+        default:
+           return -EINVAL;
+        }
+    }
 #endif
 
   default:
-        return -EINVAL;
+    return -ENOTTY;
-      }
-    }
-
-  default:
-    return -EINVAL;
   }
 }