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The Bouncy Castle Java APIs for the TLS, including a JSSE provider. 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 and used appropriately.

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package org.bouncycastle.tls.crypto;

import java.io.IOException;

import org.bouncycastle.tls.SignatureAndHashAlgorithm;

/**
 * Base interface for a TLS signer that works on raw message digests.
 */
public interface TlsSigner
{
    /**
     * Generate an encoded signature based on the passed in hash.
     *
     * @param algorithm the signature algorithm to use.
     * @param hash the hash calculated for the signature.
     * @return an encoded signature.
     * @throws IOException in case of an exception processing the hash.
     */
    byte[] generateRawSignature(SignatureAndHashAlgorithm algorithm, byte[] hash)
        throws IOException;

    TlsStreamSigner getStreamSigner(SignatureAndHashAlgorithm algorithm) throws IOException;
}