Remove exist check from doLegacySignVerify

exist requires the keystore exist permission which callers of
sign/verify may not have. Instead log key not found if begin returns
::KEY_NOT_FOUND.

Bug: 21658885
Change-Id: I8c42f3a636a248e3fb1f0344bf32667fce57f667

1 files changed, 5 insertions, 5 deletions

diff --git a/keystore/keystore.cpp b/keystore/keystore.cpp
index 639866c..a838dee 100644
--- a/keystore/keystore.cpp
+++ b/keystore/keystore.cpp
@@ -2969,10 +2969,6 @@ private:
                               uint8_t** out, size_t* outLength, const uint8_t* signature,
                               size_t signatureLength, keymaster_purpose_t purpose) {
 
-        if (exist(name, IPCThreadState::self()->getCallingUid()) != ::NO_ERROR) {
-            ALOGW("Key not found");
-            return ::KEY_NOT_FOUND;
-        }
         std::basic_stringstream<uint8_t> outBuffer;
         OperationResult result;
         KeymasterArguments inArgs;
@@ -2982,7 +2978,11 @@ private:
 
         begin(appToken, name, purpose, true, inArgs, NULL, 0, &result);
         if (result.resultCode != ResponseCode::NO_ERROR) {
-            ALOGW("Error in begin: %d", result.resultCode);
+            if (result.resultCode == ::KEY_NOT_FOUND) {
+                ALOGW("Key not found");
+            } else {
+                ALOGW("Error in begin: %d", result.resultCode);
+            }
             return translateResultToLegacyResult(result.resultCode);
         }
         inArgs.params.clear();