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Merge from 3.1: Issue #13703: add a way to randomize the hash values of basic types (str, bytes, datetime)

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in order to make algorithmic complexity attacks on (e.g.) web apps much more complicated.

The environment variable PYTHONHASHSEED and the new command line flag -R control this
behavior.
This commit is contained in:
Georg Brandl 2012-02-20 21:31:46 +01:00
commit 09a7c72cad
34 changed files with 676 additions and 162 deletions
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6
Python/sysmodule.c
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@ -1368,6 +1368,7 @@ static PyStructSequence_Field flags_fields[] = {
/* {"skip_first", "-x"}, */
{"bytes_warning", "-b"},
{"quiet", "-q"},
{"hash_randomization", "-R"},
{0}
};
@ -1376,9 +1377,9 @@ static PyStructSequence_Desc flags_desc = {
flags__doc__, /* doc */
flags_fields, /* fields */
#ifdef RISCOS
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#else
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#endif
};
@ -1412,6 +1413,7 @@ make_flags(void)
/* SetFlag(skipfirstline); */
SetFlag(Py_BytesWarningFlag);
SetFlag(Py_QuietFlag);
SetFlag(Py_HashRandomizationFlag);
#undef SetFlag
if (PyErr_Occurred()) {