Symmetric key generation for AndroidKeyStore.

This currently supports AES and HMAC with SHA-256.

Bug: 18088752
Change-Id: Ife55438cf4129b895295681bb35091cd37eb73fb

1 files changed, 28 insertions, 0 deletions

diff --git a/keystore/java/android/security/KeyStoreKeyConstraints.java b/keystore/java/android/security/KeyStoreKeyConstraints.java
index 01e6dcd2f705..47bb1ccbbeb7 100644
--- a/keystore/java/android/security/KeyStoreKeyConstraints.java
+++ b/keystore/java/android/security/KeyStoreKeyConstraints.java
@@ -290,6 +290,22 @@ public abstract class KeyStoreKeyConstraints {
                     throw new IllegalArgumentException("Unknown padding: " + padding);
             }
         }
+
+        /**
+         * @hide
+         */
+        public static String toString(@PaddingEnum int padding) {
+            switch (padding) {
+                case NONE:
+                    return "NONE";
+                case ZERO:
+                    return "ZERO";
+                case PKCS7:
+                    return "PKCS#7";
+                default:
+                    throw new IllegalArgumentException("Unknown padding: " + padding);
+            }
+        }
     }
 
     @Retention(RetentionPolicy.SOURCE)
@@ -425,5 +441,17 @@ public abstract class KeyStoreKeyConstraints {
                     throw new IllegalArgumentException("Unknown block mode: " + mode);
             }
         }
+
+        /**
+         * @hide
+         */
+        public static String toString(@BlockModeEnum int mode) {
+            switch (mode) {
+                case ECB:
+                    return "ECB";
+                default:
+                    throw new IllegalArgumentException("Unknown block mode: " + mode);
+            }
+        }
     }
 }