improve logs for pgp verifier

pgpverify/pgpverify.go

@@ -25,21 +25,21 @@ func (pgpv *PgpVerifier) Verify(signature string, publicKey string, targetPath s
 
 	verificationTarget, err := os.Open(targetPath)
 	if err != nil {
-		pgpv.Logger.Log("Open verification target: " + err.Error())
+		pgpv.Logger.Log("Failed to open verification target: " + err.Error())
 		return false
 	}
 
 	keyring, err := openpgp.ReadArmoredKeyRing(keyRingReader)
 	if err != nil {
-		pgpv.Logger.Log("Read Armored Key Ring: " + err.Error())
+		pgpv.Logger.Log("Failed to read armored key ring: " + err.Error())
 		return false
 	}
 	_, err = openpgp.CheckArmoredDetachedSignature(keyring, verificationTarget, signatureReader)
 	if err != nil {
-		pgpv.Logger.Log("Verification failed: " + err.Error())
+		pgpv.Logger.Log("Failed to verify the app download: " + err.Error())
 		return false
 	}
-	pgpv.Logger.Log("Successfully verified: entity.Identities")
+	pgpv.Logger.Log("Successfully verified downloaded app.")
 	return true
 }