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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified.

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package org.bouncycastle.operator;

import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

public interface SecretKeySizeProvider
{
    int getKeySize(AlgorithmIdentifier algorithmIdentifier);

    /**
     * Return the key size implied by the OID, if one exists.
     *
     * @param algorithm the OID of the algorithm of interest.
     * @return -1 if there is no fixed key size associated with the OID, or more information is required.
     */
    int getKeySize(ASN1ObjectIdentifier algorithm);
}