How to use the oscrypto._openssl._libcrypto.handle_openssl_error function in oscrypto

handle_openssl_error(signature_length)

        else:
            buffer_size = libcrypto.EVP_PKEY_size(private_key.evp_pkey)
            signature_buffer = buffer_from_bytes(buffer_size)
            signature_length = new(libcrypto, 'size_t *', buffer_size)

            evp_pkey_ctx_pointer_pointer = new(libcrypto, 'EVP_PKEY_CTX **')
            res = libcrypto.EVP_DigestSignInit(
                evp_md_ctx,
                evp_pkey_ctx_pointer_pointer,
                evp_md,
                null(),
                private_key.evp_pkey
            )
            handle_openssl_error(res)
            evp_pkey_ctx_pointer = unwrap(evp_pkey_ctx_pointer_pointer)

            if rsa_pss_padding:
                # Enable PSS padding
                res = libcrypto.EVP_PKEY_CTX_ctrl(
                    evp_pkey_ctx_pointer,
                    LibcryptoConst.EVP_PKEY_RSA,
                    -1,  # All operations
                    LibcryptoConst.EVP_PKEY_CTRL_RSA_PADDING,
                    LibcryptoConst.RSA_PKCS1_PSS_PADDING,
                    null()
                )
                handle_openssl_error(res)

                # Use the hash algorithm output length as the salt length
                res = libcrypto.EVP_PKEY_CTX_ctrl(

if cipher == 'rc2':
                res = libcrypto.EVP_CIPHER_CTX_ctrl(
                    evp_cipher_ctx,
                    LibcryptoConst.EVP_CTRL_SET_RC2_KEY_BITS,
                    len(key) * 8,
                    null()
                )
                handle_openssl_error(res)
            evp_cipher = null()

        res = libcrypto.EVP_EncryptInit_ex(evp_cipher_ctx, evp_cipher, null(), key, iv)
        handle_openssl_error(res)

        if padding is not None:
            res = libcrypto.EVP_CIPHER_CTX_set_padding(evp_cipher_ctx, int(padding))
            handle_openssl_error(res)

        buffer = buffer_from_bytes(buffer_size)
        output_length = new(libcrypto, 'int *')

        res = libcrypto.EVP_EncryptUpdate(evp_cipher_ctx, buffer, output_length, data, len(data))
        handle_openssl_error(res)

        output = bytes_from_buffer(buffer, deref(output_length))

        res = libcrypto.EVP_EncryptFinal_ex(evp_cipher_ctx, buffer, output_length)
        handle_openssl_error(res)

        output += bytes_from_buffer(buffer, deref(output_length))

        return output

try:
        evp_cipher_ctx = libcrypto.EVP_CIPHER_CTX_new()
        if is_null(evp_cipher_ctx):
            handle_openssl_error(0)

        evp_cipher, buffer_size = _setup_evp_encrypt_decrypt(cipher, data)

        if iv is None:
            iv = null()

        if cipher in set(['rc2', 'rc4']):
            res = libcrypto.EVP_DecryptInit_ex(evp_cipher_ctx, evp_cipher, null(), null(), null())
            handle_openssl_error(res)
            res = libcrypto.EVP_CIPHER_CTX_set_key_length(evp_cipher_ctx, len(key))
            handle_openssl_error(res)
            if cipher == 'rc2':
                res = libcrypto.EVP_CIPHER_CTX_ctrl(
                    evp_cipher_ctx,
                    LibcryptoConst.EVP_CTRL_SET_RC2_KEY_BITS,
                    len(key) * 8,
                    null()
                )
                handle_openssl_error(res)
            evp_cipher = null()

        res = libcrypto.EVP_DecryptInit_ex(evp_cipher_ctx, evp_cipher, null(), key, iv)
        handle_openssl_error(res)

        if padding is not None:
            res = libcrypto.EVP_CIPHER_CTX_set_padding(evp_cipher_ctx, int(padding))
            handle_openssl_error(res)

number_certs = libssl.sk_num(stack_pointer)
        else:
            number_certs = libssl.OPENSSL_sk_num(stack_pointer)

        self._intermediates = []

        for index in range(0, number_certs):
            if libcrypto_version_info < (1, 1):
                x509_ = libssl.sk_value(stack_pointer, index)
            else:
                x509_ = libssl.OPENSSL_sk_value(stack_pointer, index)
            buffer_size = libcrypto.i2d_X509(x509_, null())
            cert_buffer = buffer_from_bytes(buffer_size)
            cert_pointer = buffer_pointer(cert_buffer)
            cert_length = libcrypto.i2d_X509(x509_, cert_pointer)
            handle_openssl_error(cert_length)
            cert_data = bytes_from_buffer(cert_buffer, cert_length)

            cert = Asn1Certificate.load(cert_data)

            if index == 0:
                self._certificate = cert
            else:
                self._intermediates.append(cert)

if cipher == 'rc2':
                res = libcrypto.EVP_CIPHER_CTX_ctrl(
                    evp_cipher_ctx,
                    LibcryptoConst.EVP_CTRL_SET_RC2_KEY_BITS,
                    len(key) * 8,
                    null()
                )
                handle_openssl_error(res)
            evp_cipher = null()

        res = libcrypto.EVP_DecryptInit_ex(evp_cipher_ctx, evp_cipher, null(), key, iv)
        handle_openssl_error(res)

        if padding is not None:
            res = libcrypto.EVP_CIPHER_CTX_set_padding(evp_cipher_ctx, int(padding))
            handle_openssl_error(res)

        buffer = buffer_from_bytes(buffer_size)
        output_length = new(libcrypto, 'int *')

        res = libcrypto.EVP_DecryptUpdate(evp_cipher_ctx, buffer, output_length, data, len(data))
        handle_openssl_error(res)

        output = bytes_from_buffer(buffer, deref(output_length))

        res = libcrypto.EVP_DecryptFinal_ex(evp_cipher_ctx, buffer, output_length)
        handle_openssl_error(res)

        output += bytes_from_buffer(buffer, deref(output_length))

        return output

res = libcrypto.EVP_DecryptInit_ex(evp_cipher_ctx, evp_cipher, null(), null(), null())
            handle_openssl_error(res)
            res = libcrypto.EVP_CIPHER_CTX_set_key_length(evp_cipher_ctx, len(key))
            handle_openssl_error(res)
            if cipher == 'rc2':
                res = libcrypto.EVP_CIPHER_CTX_ctrl(
                    evp_cipher_ctx,
                    LibcryptoConst.EVP_CTRL_SET_RC2_KEY_BITS,
                    len(key) * 8,
                    null()
                )
                handle_openssl_error(res)
            evp_cipher = null()

        res = libcrypto.EVP_DecryptInit_ex(evp_cipher_ctx, evp_cipher, null(), key, iv)
        handle_openssl_error(res)

        if padding is not None:
            res = libcrypto.EVP_CIPHER_CTX_set_padding(evp_cipher_ctx, int(padding))
            handle_openssl_error(res)

        buffer = buffer_from_bytes(buffer_size)
        output_length = new(libcrypto, 'int *')

        res = libcrypto.EVP_DecryptUpdate(evp_cipher_ctx, buffer, output_length, data, len(data))
        handle_openssl_error(res)

        output = bytes_from_buffer(buffer, deref(output_length))

        res = libcrypto.EVP_DecryptFinal_ex(evp_cipher_ctx, buffer, output_length)
        handle_openssl_error(res)

)
                handle_openssl_error(res)
            evp_cipher = null()

        res = libcrypto.EVP_EncryptInit_ex(evp_cipher_ctx, evp_cipher, null(), key, iv)
        handle_openssl_error(res)

        if padding is not None:
            res = libcrypto.EVP_CIPHER_CTX_set_padding(evp_cipher_ctx, int(padding))
            handle_openssl_error(res)

        buffer = buffer_from_bytes(buffer_size)
        output_length = new(libcrypto, 'int *')

        res = libcrypto.EVP_EncryptUpdate(evp_cipher_ctx, buffer, output_length, data, len(data))
        handle_openssl_error(res)

        output = bytes_from_buffer(buffer, deref(output_length))

        res = libcrypto.EVP_EncryptFinal_ex(evp_cipher_ctx, buffer, output_length)
        handle_openssl_error(res)

        output += bytes_from_buffer(buffer, deref(output_length))

        return output

    finally:
        if evp_cipher_ctx:
            libcrypto.EVP_CIPHER_CTX_free(evp_cipher_ctx)

)
                handle_openssl_error(res)
            evp_cipher = null()

        res = libcrypto.EVP_DecryptInit_ex(evp_cipher_ctx, evp_cipher, null(), key, iv)
        handle_openssl_error(res)

        if padding is not None:
            res = libcrypto.EVP_CIPHER_CTX_set_padding(evp_cipher_ctx, int(padding))
            handle_openssl_error(res)

        buffer = buffer_from_bytes(buffer_size)
        output_length = new(libcrypto, 'int *')

        res = libcrypto.EVP_DecryptUpdate(evp_cipher_ctx, buffer, output_length, data, len(data))
        handle_openssl_error(res)

        output = bytes_from_buffer(buffer, deref(output_length))

        res = libcrypto.EVP_DecryptFinal_ex(evp_cipher_ctx, buffer, output_length)
        handle_openssl_error(res)

        output += bytes_from_buffer(buffer, deref(output_length))

        return output

    finally:
        if evp_cipher_ctx:
            libcrypto.EVP_CIPHER_CTX_free(evp_cipher_ctx)

buffer_length = libcrypto.i2d_DSA_PUBKEY(dsa, null())
            if buffer_length < 0:
                handle_openssl_error(buffer_length)
            buffer = buffer_from_bytes(buffer_length)
            result = libcrypto.i2d_DSA_PUBKEY(dsa, buffer_pointer(buffer))
            if result < 0:
                handle_openssl_error(result)
            public_key_bytes = bytes_from_buffer(buffer, buffer_length)

            buffer_length = libcrypto.i2d_DSAPrivateKey(dsa, null())
            if buffer_length < 0:
                handle_openssl_error(buffer_length)
            buffer = buffer_from_bytes(buffer_length)
            result = libcrypto.i2d_DSAPrivateKey(dsa, buffer_pointer(buffer))
            if result < 0:
                handle_openssl_error(result)
            private_key_bytes = bytes_from_buffer(buffer, buffer_length)

        finally:
            if dsa:
                libcrypto.DSA_free(dsa)

    elif algorithm == 'ec':
        ec_key = None

        try:
            curve_id = {
                'secp256r1': LibcryptoConst.NID_X9_62_prime256v1,
                'secp384r1': LibcryptoConst.NID_secp384r1,
                'secp521r1': LibcryptoConst.NID_secp521r1,
            }[curve]