new function to set default max columns size for base64 encoding

src/main.c

@@ -14,6 +14,7 @@
 #include <xmlsec/xmlsec.h>
 #include <xmlsec/crypto.h>
 #include <xmlsec/errors.h>
+#include <xmlsec/base64.h>
 
 #define _PYXMLSEC_FREE_NONE 0
 #define _PYXMLSEC_FREE_XMLSEC 1
@@ -127,6 +128,34 @@ static PyObject* PyXmlSec_PyEnableDebugOutput(PyObject *self, PyObject* args, Py
     Py_RETURN_NONE;
 }
 
+static char PyXmlSec_PyBase64DefaultLineSize__doc__[] = \
+    "base64_default_line_size(size = None)\n"
+    "Configures the default maximum columns size for base64 encoding.\n\n"
+    "If ``size`` is not given, this function returns the current default size, acting as a getter. "
+    "If ``size`` is given, a new value is applied and this function returns nothing, acting as a setter.\n"
+    ":param size: new default size value (optional)\n"
+    ":type size: :class:`int` or :data:`None`";
+static PyObject* PyXmlSec_PyBase64DefaultLineSize(PyObject *self, PyObject *args, PyObject *kwargs) {
+    static char *kwlist[] = { "size", NULL };
+    PyObject *pySize = NULL;
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|O:base64_default_line_size", kwlist, &pySize)) {
+        return NULL;
+    }
+    if (pySize == NULL) {
+        return PyLong_FromLong(xmlSecBase64GetDefaultLineSize());
+    }
+    int size = (int)PyLong_AsLong(pySize);
+    if (PyErr_Occurred()) {
+        return NULL;
+    }
+    if (size < 0) {
+        PyErr_SetString(PyExc_ValueError, "size must be positive");
+        return NULL;
+    }
+    xmlSecBase64SetDefaultLineSize(size);
+    Py_RETURN_NONE;
+}
+
 static PyMethodDef PyXmlSec_MainMethods[] = {
     {
         "init",
@@ -146,6 +175,12 @@ static PyMethodDef PyXmlSec_MainMethods[] = {
         METH_VARARGS|METH_KEYWORDS,
         PyXmlSec_PyEnableDebugOutput__doc__
     },
+    {
+        "base64_default_line_size",
+        (PyCFunction)PyXmlSec_PyBase64DefaultLineSize,
+        METH_VARARGS|METH_KEYWORDS,
+        PyXmlSec_PyBase64DefaultLineSize__doc__
+    },
     {NULL, NULL} /* sentinel */
 };
 

src/xmlsec/__init__.pyi

@@ -1,5 +1,5 @@
 import sys
-from typing import AnyStr, IO, Iterable, Optional, Type, TypeVar, Union
+from typing import AnyStr, IO, Iterable, Optional, Type, TypeVar, Union, overload
 
 from lxml.etree import _Element
 
@@ -24,6 +24,10 @@ _K = TypeVar('_K', bound=Key)
 def enable_debug_trace(enabled: bool = ...) -> None: ...
 def init() -> None: ...
 def shutdown() -> None: ...
+@overload
+def base64_default_line_size() -> int: ...
+@overload
+def base64_default_line_size(size: int) -> None: ...
 
 class EncryptionContext:
     key: Optional[Key]

tests/test_main.py

@@ -0,0 +1,32 @@
+import xmlsec
+from tests import base
+
+
+class TestBase64LineSize(base.TestMemoryLeaks):
+    def tearDown(self):
+        xmlsec.base64_default_line_size(64)
+        super(TestBase64LineSize, self).tearDown()
+
+    def test_get_base64_default_line_size(self):
+        self.assertEqual(xmlsec.base64_default_line_size(), 64)
+
+    def test_set_base64_default_line_size_positional_arg(self):
+        xmlsec.base64_default_line_size(0)
+        self.assertEqual(xmlsec.base64_default_line_size(), 0)
+
+    def test_set_base64_default_line_size_keyword_arg(self):
+        xmlsec.base64_default_line_size(size=0)
+        self.assertEqual(xmlsec.base64_default_line_size(), 0)
+
+    def test_set_base64_default_line_size_with_bad_args(self):
+        size = xmlsec.base64_default_line_size()
+        for bad_size in (None, '', object()):
+            with self.assertRaises(TypeError):
+                xmlsec.base64_default_line_size(bad_size)
+        self.assertEqual(xmlsec.base64_default_line_size(), size)
+
+    def test_set_base64_default_line_size_rejects_negative_values(self):
+        size = xmlsec.base64_default_line_size()
+        with self.assertRaises(ValueError):
+            xmlsec.base64_default_line_size(-1)
+        self.assertEqual(xmlsec.base64_default_line_size(), size)