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Spongy Castle is a package-rename (org.bouncycastle.* to org.spongycastle.*) of Bouncy Castle intended for Android.
Android ships with a stripped-down version of Bouncy Castle - this causes classloader collisions if you try to add
an alternative (updated/complete) Bouncy Castle jar.
This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5.
package org.spongycastle.operator;
/**
* Interface for ContentVerifiers that also support raw signatures that can be
* verified using the digest of the calculated data.
*/
public interface RawContentVerifier
{
/**
* Verify that the expected signature value was derived from the passed in digest.
*
* @param digest digest calculated from the content.
* @param expected expected value of the signature
* @return true if the expected signature is derived from the digest, false otherwise.
*/
boolean verify(byte[] digest, byte[] expected);
}