src/main/java/org/apache/xml/security/algorithms/implementations/SignatureECDSA.java [101:135]:
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        try {
            if (provider == null) {
                String providerId = JCEMapper.getProviderId();
                if (providerId == null) {
                    this.signatureAlgorithm = Signature.getInstance(algorithmID);

                } else {
                    this.signatureAlgorithm = Signature.getInstance(algorithmID, providerId);
                }

            } else {
                this.signatureAlgorithm = Signature.getInstance(algorithmID, provider);
            }

        } catch (NoSuchAlgorithmException | NoSuchProviderException ex) {
            Object[] exArgs = { algorithmID, ex.getLocalizedMessage() };
            throw new XMLSignatureException("algorithms.NoSuchAlgorithm", exArgs);
        }
    }

    /** {@inheritDoc} */
    @Override
    protected void engineSetParameter(AlgorithmParameterSpec params)
        throws XMLSignatureException {
        try {
            this.signatureAlgorithm.setParameter(params);
        } catch (InvalidAlgorithmParameterException ex) {
            throw new XMLSignatureException(ex);
        }
    }

    /** {@inheritDoc} */
    @Override
    protected boolean engineVerify(byte[] signature) throws XMLSignatureException {
        try {
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src/main/java/org/apache/xml/security/algorithms/implementations/SignatureEDDSA.java [62:96]:
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        try {
            if (provider == null) {
                String providerId = JCEMapper.getProviderId();
                if (providerId == null) {
                    this.signatureAlgorithm = Signature.getInstance(algorithmID);

                } else {
                    this.signatureAlgorithm = Signature.getInstance(algorithmID, providerId);
                }

            } else {
                this.signatureAlgorithm = Signature.getInstance(algorithmID, provider);
            }

        } catch (NoSuchAlgorithmException | NoSuchProviderException ex) {
            Object[] exArgs = { algorithmID, ex.getLocalizedMessage() };
            throw new XMLSignatureException("algorithms.NoSuchAlgorithm", exArgs);
        }
    }

    /** {@inheritDoc} */
    @Override
    protected void engineSetParameter(AlgorithmParameterSpec params)
        throws XMLSignatureException {
        try {
            this.signatureAlgorithm.setParameter(params);
        } catch (InvalidAlgorithmParameterException ex) {
            throw new XMLSignatureException(ex);
        }
    }

    /** {@inheritDoc} */
    @Override
    protected boolean engineVerify(byte[] signature) throws XMLSignatureException {
        try {
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