src/main/java/org/apache/xml/security/algorithms/implementations/SignatureDSA.java [166:233]:
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    @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);
        }
    }

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

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

    /**
     * Method engineSetHMACOutputLength
     *
     * @param HMACOutputLength
     * @throws XMLSignatureException
     */
    @Override
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src/main/java/org/apache/xml/security/algorithms/implementations/SignatureEDDSA.java [129:177]:
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    @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
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