src/main/java/org/apache/xml/security/algorithms/implementations/SignatureBaseRSA.java [117:192]:
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    @Override
    protected byte[] engineSign() throws XMLSignatureException {
        try {
            return this.signatureAlgorithm.sign();
        } catch (SignatureException ex) {
            throw new XMLSignatureException(ex);
        }
    }

    /** {@inheritDoc} */
    @Override
    protected void engineInitSign(Key privateKey, SecureRandom secureRandom)
        throws XMLSignatureException {
        engineInitSign(privateKey, secureRandom, this.signatureAlgorithm);
    }

    /** {@inheritDoc} */
    @Override
    protected void engineInitSign(Key privateKey) throws XMLSignatureException {
        engineInitSign(privateKey, (SecureRandom)null);
    }

    /** {@inheritDoc} */
    @Override
    protected void engineUpdate(byte[] input) throws XMLSignatureException {
        try {
            this.signatureAlgorithm.update(input);
        } catch (SignatureException ex) {
            throw new XMLSignatureException(ex);
        }
    }

    /** {@inheritDoc} */
    @Override
    protected void engineUpdate(byte input) throws XMLSignatureException {
        try {
            this.signatureAlgorithm.update(input);
        } catch (SignatureException ex) {
            throw new XMLSignatureException(ex);
        }
    }

    /** {@inheritDoc} */
    @Override
    protected void engineUpdate(byte[] buf, int offset, int len) throws XMLSignatureException {
        try {
            this.signatureAlgorithm.update(buf, offset, len);
        } catch (SignatureException ex) {
            throw new XMLSignatureException(ex);
        }
    }

    /** {@inheritDoc} */
    @Override
    protected String engineGetJCEAlgorithmString() {
        return this.signatureAlgorithm.getAlgorithm();
    }

    /** {@inheritDoc} */
    @Override
    protected String engineGetJCEProviderName() {
        return this.signatureAlgorithm.getProvider().getName();
    }

    /** {@inheritDoc} */
    @Override
    protected void engineSetHMACOutputLength(int HMACOutputLength)
        throws XMLSignatureException {
        throw new XMLSignatureException("algorithms.HMACOutputLengthOnlyForHMAC");
    }

    /** {@inheritDoc} */
    @Override
    protected void engineInitSign(
        Key signingKey, AlgorithmParameterSpec algorithmParameterSpec
    ) throws XMLSignatureException {
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src/main/java/org/apache/xml/security/algorithms/implementations/SignatureEDDSA.java [111:187]:
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    @Override
    protected byte[] engineSign() throws XMLSignatureException {
        try {
            return this.signatureAlgorithm.sign();
        } catch (SignatureException ex) {
            throw new XMLSignatureException(ex);
        }
    }

    /** {@inheritDoc} */
    @Override
    protected void engineInitSign(Key privateKey, SecureRandom secureRandom)
        throws XMLSignatureException {

        engineInitSign(privateKey, secureRandom, this.signatureAlgorithm);
    }

    /** {@inheritDoc} */
    @Override
    protected void engineInitSign(Key privateKey) throws XMLSignatureException {
        engineInitSign(privateKey, (SecureRandom)null);
    }

    /** {@inheritDoc} */
    @Override
    protected void engineUpdate(byte[] input) throws XMLSignatureException {
        try {
            this.signatureAlgorithm.update(input);
        } catch (SignatureException ex) {
            throw new XMLSignatureException(ex);
        }
    }

    /** {@inheritDoc} */
    @Override
    protected void engineUpdate(byte input) throws XMLSignatureException {
        try {
            this.signatureAlgorithm.update(input);
        } catch (SignatureException ex) {
            throw new XMLSignatureException(ex);
        }
    }

    /** {@inheritDoc} */
    @Override
    protected void engineUpdate(byte[] buf, int offset, int len) throws XMLSignatureException {
        try {
            this.signatureAlgorithm.update(buf, offset, len);
        } catch (SignatureException ex) {
            throw new XMLSignatureException(ex);
        }
    }

    /** {@inheritDoc} */
    @Override
    protected String engineGetJCEAlgorithmString() {
        return this.signatureAlgorithm.getAlgorithm();
    }

    /** {@inheritDoc} */
    @Override
    protected String engineGetJCEProviderName() {
        return this.signatureAlgorithm.getProvider().getName();
    }

    /** {@inheritDoc} */
    @Override
    protected void engineSetHMACOutputLength(int HMACOutputLength)
        throws XMLSignatureException {
        throw new XMLSignatureException("algorithms.HMACOutputLengthOnlyForHMAC");
    }

    /** {@inheritDoc} */
    @Override
    protected void engineInitSign(
        Key signingKey, AlgorithmParameterSpec algorithmParameterSpec
    ) throws XMLSignatureException {
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