Hi,
I have followed Android's keystore mechanism defined
by http://developer.android.com/training/articles/keystore.html to generate
private key and then used the private key to sign the data. When I am using
same private key and same data, I am getting similar signature most of the
time. But this behaviour is not consistent. During a stress test, 1 out of
10 times, my application fails as *Android Signature API is giving
different result with same private key and same data. *Below is my code
look like.
Signature signatureObject = Signature.getInstance("SHA256withRSA");
if(null != signatureObject) {
signatureObject.initSign(existingKey);
signatureObject.update(dataByterray);
byte[] signatureByteArray = signatureObject.sign();
if(null != signatureByteArray && 0 < signatureByteArray.length) {
String signatureString = Base64.encodeToString(signatureByteArray,
Base64.DEFAULT);
//s_log.debug("db signature string = " + signatureString, s_CLASS);
result = signatureString.substring(0,31).toCharArray();
}
}
Please help me to find out the problem. I am using the result data to
encrypt my database, but as I am getting different result sometimes, I am
getting error in opening the database, thus lots of complains from users. This
is happening in most of Android devices >= 18. Please suggest what can be done.
Thanks.
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